阅读说明：本技术 一种电连接结构、光伏组件及其制备方法 (Electric connection structure, photovoltaic module and preparation method thereof ) 是由 丁佳卫 陈宏月 商林太 于 2021-07-21 设计创作，主要内容包括：本发明涉及一种电连接结构、光伏组件及其制备方法,属于太阳能发电技术领域。该电连接结构包括一个集流部、汇流部以及连接所述集流部和所述汇流部的连接部,其中,所述集流部、所述汇流部和所述连接部一体成型,所述汇流部的长度大于所述集流部的长度。使用该电连接结构制备的光伏组件的焊点较少,不仅可以简化光伏组件的制备工序而且还可以提高光伏组件的良率。(The invention relates to an electric connection structure, a photovoltaic module and a preparation method of the photovoltaic module, and belongs to the technical field of solar power generation. The electric connection structure comprises a current collecting part, a bus part and a connecting part for connecting the current collecting part and the bus part, wherein the current collecting part, the bus part and the connecting part are integrally formed, and the length of the bus part is greater than that of the current collecting part. The photovoltaic module prepared by the electric connection structure has fewer welding spots, so that the preparation process of the photovoltaic module can be simplified, and the yield of the photovoltaic module can be improved.)

1. An electrical connection structure, characterized in that,

the electrical connection structure comprises a current collecting part (11), a bus bar part (12) and a connecting part (13) connecting the current collecting part (11) and the bus bar part (12),

wherein the collecting part (11), the bus bar part (12) and the connecting part (13) are integrally formed,

the length of the confluence part (12) is larger than that of the current collecting part (11).

2. An electrical connection structure, characterized in that,

the electrical connection structure includes a first current collecting portion (111), a second current collecting portion (112), a bus bar portion (12), and a connection portion (13) connecting the first current collecting portion (111) and the second current collecting portion (112) to the bus bar portion (12),

wherein the first current collecting part (111), the second current collecting part (112), the bus bar part (12), and the connecting part (13) are integrally formed,

the first current collecting portion (111) and the second current collecting portion (112) are located on the same side of the bus bar portion (12), and the first current collecting portion (111) is close to the bus bar portion (12) with respect to the second current collecting portion (112), and the second current collecting portion (112) is far from the bus bar portion (12) with respect to the first current collecting portion (111).

3. The electrical connection structure according to claim 2,

the connection portion (13) includes a first connection portion (131) connecting the first current collecting portion (111) and the bus bar portion (12), and a second connection portion (132) connecting the second current collecting portion (112) and the first current collecting portion (111).

4. The electrical connection structure according to claim 3,

the second connection portion (132) extends from an end of the first connection portion (131) connected to the first current collecting portion (111) to the second current collecting portion (112).

5. The electrical connection structure according to claim 4,

the first collecting part (111) and the bus bar part (12) are in the same plane,

the first current collecting part (111) and the second current collecting part (112) are in different planes.

6. The electrical connection structure according to claim 2,

the connection portion (13) includes a third connection portion (133) connecting the first current collecting portion (111) and the bus bar portion (12), and a fourth connection portion (134) connecting the second current collecting portion (112) and the bus bar portion (12).

7. The electrical connection structure according to claim 6,

the first current collecting part (111), the second current collecting part (112) and the bus bar part (12) are positioned on the same plane,

the first current collecting portion (111) is formed with a penetration portion (14) through which the fourth connecting portion (134) passes.

8. A photovoltaic module, characterized in that it comprises a first (2001) and a second (2002) electrical connection structure and a first (1001) and a second (1002) cell connected in parallel by said first (2001) and second (2002) electrical connection structure,

wherein each of the first and second electrical connection structures (2001, 2002) includes one current collecting portion (11), a bus bar portion (12), and a connection portion (13) connecting the current collecting portion (11) and the bus bar portion (12), the current collecting portion (11), the bus bar portion (12), and the connection portion (13) are integrally molded,

wherein the first cell tab (1001) is electrically connected to the current collecting portion (11) of the first electrical connection structure (2001), the second cell tab (1002) is electrically connected to the current collecting portion (11) of the second electrical connection structure (2002), and the bus portion (12) of the first electrical connection structure (2001) is electrically connected to the bus portion (12) of the second electrical connection structure (2002).

9. The photovoltaic module of claim 8,

the first cell sheet (1001) is electrically connected to the current collecting part (11) of the first electrical connection structure (2001) through a conductive material,

the second battery piece (1002) is electrically connected to the current collecting part (11) of the second electrical connection structure (2002) through a conductive material,

the bus bar portion (12) of the first electrical connection structure (2001) is electrically connected to the bus bar portion (12) of the second electrical connection structure (2002) by soldering.

10. The photovoltaic module of claim 8,

the sum of the lengths of the bus bar (12) of the first electrical connection structure (2001) and the bus bar (12) of the second electrical connection structure (2002) is greater than the sum of the lengths of the current collecting portion (11) of the first electrical connection structure (2001) and the current collecting portion (11) of the second electrical connection structure (2002).

Technical Field

The invention relates to the technical field of solar power generation, in particular to an electric connection structure, a photovoltaic module and a preparation method of the photovoltaic module.

Background

In the field of solar power generation, a photovoltaic module is formed by connecting a whole cell or a stack of cells in parallel and/or in series through a solder ribbon and a bus ribbon. The laminated cell string is formed by firstly cutting a whole cell into half or smaller cells, then laminating a front main grid of a front cut cell with a back main grid of a back cut cell through a conductive material (such as conductive adhesive), then connecting the cut cells through curing the conductive material to form the laminated cell string, and then connecting the laminated cell string in parallel and/or in series through a welding strip and a bus strip to form the photovoltaic module. And the whole cell does not need to be cut, and the photovoltaic module is directly formed by connecting the welding strips and the bus bars in parallel and/or in series.

Taking a laminated cell string as an example, fig. 1 is a schematic diagram of the connection of the laminated cell string and a welding strip, and fig. 2 is a schematic diagram of the connection of the laminated cell string and the welding strip through a bus bar. Referring to fig. 1 and 2, the back surface of a first cell 2 at the left end of a shingled cell string 1 is connected with a first welding strip 3 through conductive adhesive, the front surface of a second cell 4 at the right end is connected with a second welding strip 5 through conductive adhesive, and currents of the positive electrode and the negative electrode of the shingled cell string 1 are led out through two protruding parts 6 of the first welding strip 3 and the second welding strip 5. As shown in fig. 2, the shingled cell string 1 is laid out after being electrically connected to the first and second solder ribbons 3 and 5, and the plurality of shingled cell strings 1 are connected in series and/or in parallel by placing the bus bar 7 in the longitudinal direction and soldering the bus bar 7 to the protruding portions 6 of the first and second solder ribbons 3 and 5, thereby forming the photovoltaic module.

As can be seen from fig. 2, the two protruding portions 6 at the left end of each row of battery strings arranged transversely need to be connected with the bus bar 7 through 2 welding points, the four protruding portions 6 in the middle need to be connected with the bus bar 7 through 4 welding points, and the two protruding portions 6 at the right end need to be connected with the bus bar 7 through 2 welding points. With the increase of the number of the battery strings, the number of the welding points is multiplied, which not only causes the manufacturing process of the photovoltaic module to be complicated, but also causes the yield of the photovoltaic module to be low due to welding missing or hidden cracks or splinters generated in the welding area.

Disclosure of Invention

In view of the foregoing analysis, the present invention is directed to an electrical connection structure, a photovoltaic module and a method for manufacturing the same, so as to solve the problems of complicated process and low yield caused by many solder joints in the prior art.

The purpose of the invention is mainly realized by the following technical scheme:

in a first aspect, the present invention provides an electrical connection structure, including a current collecting portion, a bus bar portion, and a connecting portion connecting the current collecting portion and the bus bar portion, wherein the current collecting portion, the bus bar portion, and the connecting portion are integrally formed, and a length of the bus bar portion is greater than a length of the current collecting portion.

In a second aspect, the present invention provides an electrical connection structure including a first current collecting portion, a second current collecting portion, a bus portion, and a connecting portion connecting the first current collecting portion and the second current collecting portion to the bus portion, wherein the first current collecting portion, the second current collecting portion, the bus portion, and the connecting portion are integrally formed, the first current collecting portion and the second current collecting portion are located on the same side of the bus portion, and the first current collecting portion is close to the bus portion with respect to the second current collecting portion, and the second current collecting portion is far from the bus portion with respect to the first current collecting portion.

In a third aspect, the present invention provides a photovoltaic module comprising a first electrical connection structure and a second electrical connection structure, and a first cell piece and a second cell piece connected in parallel by the first electrical connection structure and the second electrical connection structure, wherein each of the first electrical connection structure and the second electrical connection structure comprises a current collecting portion, a bus portion, and a connection portion connecting the current collecting portion and the bus portion, the current collecting portion, the bus portion, and the connection portion are integrally formed,

wherein the first cell piece is electrically connected to the current collecting part of the first electrical connection structure, the second cell piece is electrically connected to the current collecting part of the second electrical connection structure, and the bus bar part of the first electrical connection structure is electrically connected to the bus bar part of the second electrical connection structure.

In a fourth aspect, the present invention provides a method for preparing a photovoltaic module, comprising:

providing a first battery piece and a second battery piece;

preparing a first electrical connection structure and a second electrical connection structure, wherein each of the first electrical connection structure and the second electrical connection structure includes one current collecting portion, a bus bar portion, and a connection portion connecting the current collecting portion and the bus bar portion, the current collecting portion, the bus bar portion, and the connection portion being integrally formed;

electrically connecting the first cell tab to the current collecting portion of the first electrical connection structure, and electrically connecting the second cell tab to the current collecting portion of the second electrical connection structure;

electrically connecting the bus bar portion of the first electrical connection structure to the bus bar portion of the second electrical connection structure.

In a fifth aspect, the present invention provides a photovoltaic module comprising a third electrical connection structure and a fourth electrical connection structure, and a third cell and a fourth cell connected in series via the third electrical connection structure and the fourth electrical connection structure, wherein each of the third electrical connection structure and the fourth electrical connection structure comprises a current collecting portion, a bus portion, and a connection portion connecting the current collecting portion and the bus portion, the current collecting portion, the bus portion, and the connection portion are integrally formed,

the third cell piece is electrically connected to the current collecting portion of the third electrical connection structure, the fourth cell piece is electrically connected to the current collecting portion of the fourth electrical connection structure, the electrode polarity of the connection position of the third cell piece and the current collecting portion of the third electrical connection structure is opposite to the electrode polarity of the connection position of the fourth cell piece and the current collecting portion of the fourth electrical connection structure, and the current collecting portion of the fourth electrical connection structure is electrically connected to the connection portion of the third electrical connection structure.

In a sixth aspect, the present invention provides a method for preparing a photovoltaic module, comprising:

providing a third battery piece and a fourth battery piece;

preparing a third electrical connection structure and a fourth electrical connection structure, wherein each of the third electrical connection structure and the fourth electrical connection structure comprises a current collecting portion, a bus portion and a connection portion connecting the current collecting portion and the bus portion, and the current collecting portion, the bus portion and the connection portion are integrally formed;

electrically connecting the third cell tab to the current collecting portion of the third electrical connection structure, electrically connecting the fourth cell tab to the current collecting portion of the fourth electrical connection structure, wherein the polarity of the electrode at the connection of the third cell tab to the current collecting portion of the third electrical connection structure is opposite to the polarity of the electrode at the connection of the fourth cell tab to the current collecting portion of the fourth electrical connection structure, and electrically connecting the bus bar portion of the fourth electrical connection structure to the connection portion of the third electrical connection structure.

In a seventh aspect, the present invention provides a photovoltaic module, including a fifth electrical connection structure, a sixth electrical connection structure, a seventh electrical connection structure, and an eighth electrical connection structure, and a fifth cell, a sixth cell, a seventh cell, and an eighth cell connected in series and parallel via the fifth electrical connection structure, the sixth electrical connection structure, the seventh electrical connection structure, and the eighth electrical connection structure, wherein each of the fifth electrical connection structure, the sixth electrical connection structure, the seventh electrical connection structure, and the eighth electrical connection structure includes a current collecting portion, and a connection portion connecting the current collecting portion and the current collecting portion, and the connection portion are integrally formed,

wherein the fifth cell piece is electrically connected to the current collecting part of the fifth electrical connection structure, the sixth cell piece is electrically connected to the current collecting part of a sixth electrical connection structure, the polarity of the electrode at the connection of the fifth cell piece and the current collecting part of the fifth electrical connection structure is opposite to the polarity of the electrode at the connection of the sixth cell piece and the current collecting part of the sixth electrical connection structure, and the current collecting part of the sixth electrical connection structure is electrically connected to the connection part of the fifth electrical connection structure;

the seventh cell piece is electrically connected to the current collecting part of the seventh electrical connection structure, the eighth cell piece is electrically connected to the current collecting part of the eighth electrical connection structure, the polarity of the electrode at the connection position of the seventh cell piece and the current collecting part of the seventh electrical connection structure is opposite to the polarity of the electrode at the connection position of the eighth cell piece and the current collecting part of the eighth electrical connection structure, and the bus part of the eighth electrical connection structure is electrically connected to the connection part of the seventh electrical connection structure;

the bus bar portion of the fifth electrical connection structure is electrically connected to the bus bar portion of the seventh electrical connection structure, and the bus bar portion of the sixth electrical connection structure is electrically connected to the bus bar portion of the eighth electrical connection structure.

In an eighth aspect, the present invention provides a method for preparing a photovoltaic module, comprising:

providing a fifth battery piece, a sixth battery piece, a seventh battery piece and an eighth battery piece;

preparing a fifth electrical connection structure, a sixth electrical connection structure, a seventh electrical connection structure, and an eighth electrical connection structure, wherein each of the fifth electrical connection structure, the sixth electrical connection structure, the seventh electrical connection structure, and the eighth electrical connection structure includes one current collecting portion, one bus bar portion, and a connection portion connecting the current collecting portion and the bus bar portion, the current collecting portion, the bus bar portion, and the connection portion being integrally molded;

electrically connecting the fifth cell tab to the current collecting portion of the fifth electrical connection structure, electrically connecting the sixth cell tab to the current collecting portion of the sixth electrical connection structure, wherein a polarity of an electrode at a connection of the fifth cell tab to the current collecting portion of the fifth electrical connection structure is opposite to a polarity of an electrode at a connection of the sixth cell tab to the current collecting portion of the sixth electrical connection structure, and electrically connecting the bus bar portion of the sixth electrical connection structure to the connection portion of the fifth electrical connection structure;

electrically connecting the seventh cell tab to a current collecting portion of a seventh electrical connection structure, electrically connecting the eighth cell tab to a current collecting portion of an eighth electrical connection structure, wherein a polarity of an electrode at a connection of the seventh cell tab to the current collecting portion of the seventh electrical connection structure and a polarity of an electrode at a connection of the eighth cell tab to the current collecting portion of the eighth electrical connection structure are opposite, and electrically connecting a bus bar portion of the eighth electrical connection structure to a connection portion of the seventh electrical connection structure;

electrically connecting the bus bar portion of the fifth electrical connection structure to the bus bar portion of the seventh electrical connection structure, and electrically connecting the bus bar portion of the sixth electrical connection structure to the bus bar portion of the eighth electrical connection structure.

In a ninth aspect, the present invention provides a photovoltaic module, comprising a ninth electrical connection structure, and a ninth cell piece and a tenth cell piece connected in series through the ninth electrical connection structure, wherein the ninth electrical connection structure comprises a current collecting portion, a bus portion, and a connecting portion connecting the current collecting portion and the bus portion, the current collecting portion, the bus portion, and the connecting portion are integrally formed,

wherein the ninth cell tab is electrically connected to the first face of the current collecting portion of the ninth electrical connection structure, the tenth cell tab is electrically connected to the second face of the current collecting portion of the ninth electrical connection structure opposite to the first face, and the electrode polarity at the junction of the ninth cell tab and the first face of the current collecting portion of the ninth electrical connection structure is opposite to the electrode polarity at the junction of the tenth cell tab and the second face of the current collecting portion of the ninth electrical connection structure.

In a tenth aspect, the present invention provides a method for preparing a photovoltaic module, comprising:

providing a ninth battery piece and a tenth battery piece;

preparing a ninth electrical connection structure, wherein the ninth electrical connection structure comprises a current collecting portion, a bus bar portion and a connection portion connecting the current collecting portion and the bus bar portion, and the current collecting portion, the bus bar portion and the connection portion are integrally formed;

electrically connecting the ninth cell tab to a first face of the current collector of the ninth electrical connection structure and electrically connecting the tenth cell tab to a second face of the current collector of the ninth electrical connection structure opposite the first face, wherein the polarity of the electrode at the junction of the ninth cell tab with the first face of the current collector of the ninth electrical connection structure is opposite the polarity of the electrode at the junction of the tenth cell tab with the second face of the current collector of the ninth electrical connection structure.

In an eleventh aspect, the present invention provides a photovoltaic module comprising tenth and eleventh electrical connection structures and eleventh, twelfth, thirteenth and fourteenth battery cells connected in series-parallel through the tenth and eleventh electrical connection structures, wherein each of the tenth and eleventh electrical connection structures comprises one current collecting portion, a bus bar portion, and a connection portion connecting the current collecting portion and the bus bar portion, the current collecting portion, the bus bar portion and the connection portion being integrally formed,

wherein the eleventh cell tab is electrically connected to a first face of the current collecting part of the tenth electrical connection structure, a twelfth cell tab is electrically connected to a second face of the current collecting part of the tenth electrical connection structure opposite to the first face, and a polarity of an electrode at a connection of the eleventh cell tab with the first face of the current collecting part of the tenth electrical connection structure is opposite to a polarity of an electrode at a connection of the twelfth cell tab with the second face of the current collecting part of the tenth electrical connection structure,

wherein a thirteenth cell tab is electrically connected to a first face of the current collecting part of the eleventh electrical connection structure, the fourteenth cell tab is electrically connected to a second face of the current collecting part of the eleventh electrical connection structure opposite to the first face, a polarity of an electrode at a connection of the thirteenth cell tab with the first face of the current collecting part of the eleventh electrical connection structure is opposite to a polarity of an electrode at a connection of the fourteenth cell tab with the second face of the current collecting part of the eleventh electrical connection structure,

the bus bar portion of the tenth electrical connection structure is electrically connected to the bus bar portion of the eleventh electrical connection structure.

In a twelfth aspect, the present invention provides a method for preparing a photovoltaic module, comprising:

providing an eleventh battery piece, a twelfth battery piece, a thirteenth battery piece and a fourteenth battery piece;

preparing a tenth electrical connection structure and an eleventh electrical connection structure, wherein each of the tenth and eleventh electrical connection structures includes one current collecting portion, a bus bar portion, and a connection portion connecting the current collecting portion and the bus bar portion, the current collecting portion, the bus bar portion, and the connection portion being integrally molded;

electrically connecting the eleventh cell tab to a first face of the current collecting part of the tenth electrical connection structure, electrically connecting a twelfth cell tab to a second face of the current collecting part of the tenth electrical connection structure opposite to the first face, wherein a polarity of an electrode at a connection of the eleventh cell tab to the first face of the current collecting part of the tenth electrical connection structure is opposite to a polarity of an electrode at a connection of the twelfth cell tab to the second face of the current collecting part of the tenth electrical connection structure,

electrically connecting the thirteenth cell tab to a first face of the current collector of the eleventh electrical connection structure, electrically connecting the fourteenth cell tab to a second face of the current collector of the eleventh electrical connection structure opposite to the first face, wherein a polarity of an electrode at a connection of the thirteenth cell tab to the first face of the current collector of the eleventh electrical connection structure is opposite to a polarity of an electrode at a connection of the fourteenth cell tab to the second face of the current collector of the eleventh electrical connection structure,

electrically connecting the bus bar portion of the tenth electrical connection structure to the bus bar portion of the eleventh electrical connection structure.

In a thirteenth aspect, the present invention provides a photovoltaic module, including a twelfth electrical connection structure, and a fifteenth cell and a sixteenth cell connected in series through the twelfth electrical connection structure, wherein the twelfth electrical connection structure includes a first current collecting portion, a second current collecting portion, a bus portion, and a connection portion connecting the first current collecting portion and the second current collecting portion to the bus portion, the first current collecting portion, the second current collecting portion, the bus portion, and the connection portion are integrally formed, the first current collecting portion and the second current collecting portion are located on the same side of the bus portion, and the first current collecting portion is close to the bus portion relative to the second current collecting portion, and the second current collecting portion is far from the bus portion relative to the first current collecting portion,

wherein the fifteenth cell piece is electrically connected to the first current collecting portion of the twelfth electrical connection structure, the sixteenth cell piece is electrically connected to the second current collecting portion of the twelfth electrical connection structure, and the electrode polarity of the connection position of the fifteenth cell piece and the first current collecting portion of the twelfth electrical connection structure is opposite to the electrode polarity of the connection position of the sixteenth cell piece and the second current collecting portion of the twelfth electrical connection structure.

In a fourteenth aspect, the present invention provides a method for preparing a photovoltaic module, comprising:

providing a fifteenth battery piece and a sixteenth battery piece;

preparing a twelfth electrical connection structure, wherein the twelfth electrical connection structure includes a first current collecting portion, a second current collecting portion, a bus portion, and a connecting portion connecting the first current collecting portion and the second current collecting portion to the bus portion, the first current collecting portion, the second current collecting portion, the bus portion, and the connecting portion are integrally formed, the first current collecting portion and the second current collecting portion are located on the same side of the bus portion, and the first current collecting portion is close to the bus portion with respect to the second current collecting portion, and the second current collecting portion is far from the bus portion with respect to the first current collecting portion;

and electrically connecting the fifteenth cell piece to the first current collecting part of the twelfth electrical connection structure, and electrically connecting the sixteenth cell piece to the second current collecting part of the twelfth electrical connection structure, wherein the polarity of the electrode at the connection position of the fifteenth cell piece and the first current collecting part of the twelfth electrical connection structure is opposite to the polarity of the electrode at the connection position of the sixteenth cell piece and the second current collecting part of the twelfth electrical connection structure.

In a fifteenth aspect, the present invention provides a photovoltaic module including a thirteenth electrical connection structure and a fourteenth electrical connection structure, and a seventeenth cell, an eighteenth cell, a nineteenth cell, and a twentieth cell connected in series-parallel via the thirteenth electrical connection structure and the fourteenth electrical connection structure, each of the thirteenth electrical connection structure and the fourteenth electrical connection structure including a first current collecting portion, a second current collecting portion, a current collecting portion, and a connecting portion connecting the first current collecting portion and the second current collecting portion to the current collecting portion, the first current collecting portion, the second current collecting portion, the current collecting portion, and the connecting portion being integrally formed, the first current collecting portion and the second current collecting portion being located on the same side of the current collecting portion, and with respect to the second current collecting portion, the first current collecting portion being close to the current collecting portion, with respect to the first current collecting portion, the second current collecting portion is away from the bus portion,

wherein the seventeenth battery tab is electrically connected to the first current collecting part of the thirteenth electrical connection structure, the eighteenth battery tab is electrically connected to the second current collecting part of the thirteenth electrical connection structure, the electrode polarity of the connection of the seventeenth battery tab with the first current collecting part of the thirteenth electrical connection structure is opposite to the electrode polarity of the connection of the eighteenth battery tab with the second current collecting part of the thirteenth electrical connection structure,

wherein the nineteenth cell piece is electrically connected to the first current collecting part of the fourteenth electrical connection structure, the twentieth cell piece is electrically connected to the second current collecting part of the fourteenth electrical connection structure, the polarity of the electrode at the connection of the nineteenth cell piece with the first current collecting part of the fourteenth electrical connection structure is opposite to the polarity of the electrode at the connection of the twentieth cell piece with the second current collecting part of the fourteenth electrical connection structure,

wherein the bus bar portion of the thirteenth electrical connection structure is electrically connected to the bus bar portion of the fourteenth electrical connection structure.

In a sixteenth aspect, the present invention provides a method for preparing a photovoltaic module, comprising:

providing a seventeenth battery piece, an eighteenth battery piece, a nineteenth battery piece and a twentieth battery piece;

preparing a thirteenth electrical connection structure and a fourteenth electrical connection structure, wherein each of the thirteenth and fourteenth electrical connection structures includes a first current collecting portion, a second current collecting portion, a bus bar portion, and a connection portion connecting the first and second current collecting portions to the bus bar portion, the first, second, and bus bar portions and the connection portion are integrally formed, the first and second current collecting portions are located on the same side of the bus bar portion, and the first current collecting portion is close to the bus bar portion, and the second current collecting portion is far from the bus bar portion;

electrically connecting the seventeenth battery tab to the first current collecting part of the thirteenth electrical connection structure, and electrically connecting the eighteenth battery tab to the second current collecting part of the thirteenth electrical connection structure, wherein a polarity of an electrode at a connection of the seventeenth battery tab to the first current collecting part of the thirteenth electrical connection structure is opposite to a polarity of an electrode at a connection of the eighteenth battery tab to the second current collecting part of the thirteenth electrical connection structure;

electrically connecting the nineteenth cell tab to the first current collecting portion of the fourteenth electrical connection structure, and electrically connecting the twentieth cell tab to the second current collecting portion of the fourteenth electrical connection structure, wherein the polarity of the electrode at the connection of the nineteenth cell tab to the first current collecting portion of the fourteenth electrical connection structure is opposite to the polarity of the electrode at the connection of the twentieth cell tab to the second current collecting portion of the fourteenth electrical connection structure;

electrically connecting the bus bar portion of the thirteenth electrical connection structure to the bus bar portion of the fourteenth electrical connection structure.

Compared with the prior art, the electric connection structure, the photovoltaic module and the preparation method thereof provided by the invention can realize at least one of the following beneficial effects:

1. according to the invention, the electric connection structure is integrally formed, so that welding points in the series connection and/or parallel connection process of the battery pieces are reduced, the probability of welding missing is avoided, and fine burrs generated in the welding process are reduced, so that the risks of hidden cracking and splitting caused by welding are reduced, and the qualification rate of the assembly is improved;

2. according to the photovoltaic module, the integrally formed electric connection structure is used, and the connection mode with the battery piece is combined, so that the preparation process of the photovoltaic module is simpler, the manufacturing time is reduced, the realization of automatic production is facilitated, and the production efficiency is increased.

3. According to the photovoltaic module, the integrally formed electric connection structure is used, so that welding spots of the photovoltaic module are reduced, the use of soldering flux is reduced, the material consumption is reduced, and the cost is reduced.

Drawings

Fig. 1 is a schematic diagram of electrical connection of a stack of cells to a solder ribbon provided in the prior art;

FIG. 2 is a schematic diagram of the electrical connection of a stack of shingled cells to solder and bus strips as provided by the prior art;

fig. 3 is a schematic view of an electrical connection structure according to a first embodiment of the present invention;

fig. 4 is a schematic view of an electrical connection structure according to a second embodiment of the present invention;

fig. 5 is a schematic view of an electrical connection structure according to a third embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along L-L of FIG. 5;

fig. 7 is a schematic view of an electrical connection structure according to a fourth embodiment of the present invention;

fig. 8 is a schematic diagram of parallel connection of cells of a photovoltaic module according to a fifth embodiment of the present invention;

FIG. 9 is a flow chart of a method of making the photovoltaic module shown in FIG. 8;

fig. 10 is a schematic view of a photovoltaic module according to a sixth embodiment of the present invention, in which cells are connected in series;

FIG. 11 is a cross-sectional view taken along A-A of FIG. 10;

FIG. 12 is a flow chart of a method of making the photovoltaic module shown in FIG. 10;

fig. 13 is a schematic diagram of series-parallel connection of cells of a photovoltaic module according to a seventh embodiment of the invention;

FIG. 14 is a flow chart of a method of making the photovoltaic module shown in FIG. 13;

fig. 15 is a schematic view of a photovoltaic module according to an eighth embodiment of the present invention, wherein the photovoltaic module comprises cells connected in series;

FIG. 16 is a cross-sectional view taken along B-B of FIG. 15;

FIG. 17 is a flow chart of a method of making the photovoltaic module of FIG. 15;

fig. 18 is a schematic diagram of series-parallel connection of cells of a photovoltaic module according to a ninth embodiment of the present invention;

FIG. 19 is a flow chart of a method of making the photovoltaic module shown in FIG. 18;

fig. 20 is a schematic view of a photovoltaic module according to a tenth embodiment of the present invention, in which cells are connected in series;

FIG. 21 is a cross-sectional view taken along C-C of FIG. 20;

FIG. 22 is a flow chart of a method of making the photovoltaic module shown in FIG. 20;

fig. 23 is a schematic diagram of series-parallel connection of cells of a photovoltaic module according to an eleventh embodiment of the invention.

Fig. 24 is a flow chart of a method of making the photovoltaic module shown in fig. 23.

Reference numerals:

< Prior Art >

1-a shingled battery string; 2-a first cell; 3-a first conventional solder strip; 4-a second cell piece; 5-a second conventional solder strip; 6-a protrusion; 7-conventional bus bars;

< present invention >

11-a current collector; 111-a first header; 112-a second header; 12-a junction; 13-a connecting part; 131-a first connection; 132-a second connecting portion; 133-a third connecting portion; 134-a fourth connection; 21-a first part; 22-a second part; 23-a third portion; 14-a penetration; 40-a conductive material; 1001-first battery piece; 1002-a second cell; 1003-third cell slice; 1004-a fourth cell; 1005-a fifth battery piece; 1006-sixth cell; 1007-seventh cell; 1008-an eighth cell slice; 1009-ninth cell; 1010-tenth cell; 1011-eleventh cell; 1012-twelfth battery piece; 1013-a thirteenth cell; 1014-a fourteenth cell piece; 1015-a fifteenth cell piece; 1016-sixteenth cell piece; 1017-seventeenth battery piece; 1018-eighteenth cell; 1019-nineteenth cell; 1020-a twentieth cell; 2001-first electrical connection structure; 2002-a second electrical connection structure; 2003-a third electrical connection structure; 2004-a fourth electrical connection structure; 2005-a fifth electrical connection structure; 2006-a sixth electrical connection structure; 2007-a seventh electrical connection structure; 2008-an eighth electrical connection structure; 2009-ninth electrical connection structure; 2010-tenth electrical connection structure; 2011-eleventh electrical connection structure; 2012-a twelfth electrical connection structure; 2013-a thirteenth electrical connection; 2014-a fourteenth electrical connection structure; 3001-a first battery string; 3002-a second battery string; 3003-a third battery string; 3004-a fourth battery string; 3005-a fifth battery string; 3006-sixth battery string; 3007-a seventh battery string; 3008-eighth battery string; 3009-ninth battery string; 3010-tenth battery string; 3011-an eleventh battery string; 3012-a twelfth battery string; 3013-a thirteenth battery string; 3014-a fourteenth battery string; 3015-a fifteenth battery string; 3016-a sixteenth battery string; 3017-a seventeenth battery string; 3018-an eighteenth battery string; 3019-a nineteenth battery string; 3020-twentieth battery string; 200-edge cell pieces; 100-edge electrical connection structure.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The embodiment of the invention provides an electric connection structure, a photovoltaic assembly and a preparation method of the photovoltaic assembly.

First, an electrical connection structure provided by the present invention is described in detail, and the electrical connection structure according to an embodiment of the present invention includes one or two current collecting portions, a bus bar portion, and a connection portion connecting the one or two current collecting portions and the bus bar portion to each other. The current collecting part is electrically connected with the cell pieces of the photovoltaic module, and the bus part is electrically connected with the bus part and/or the connecting part of the adjacent electric connection structure electrically connected with the adjacent cell pieces of the photovoltaic module so as to realize series connection and/or parallel connection of the cell pieces of the photovoltaic module. The current collecting portion, the current collecting portion and the connecting portion are integrally formed.

In particular, the current collector may be electrically connected to a main gate on the front or back side of a cell of the photovoltaic module to collect and draw current from the cell to achieve series and/or parallel connection with other cells. For example, the current collecting part may be electrically connected to the battery cell through a conductive material. The conductive material may be, for example, a conductive paste, a conductive tape, a solder paste, or the like.

In order to facilitate electrical connection of the current collecting part to the battery cell, the current collecting part may be formed in a shape corresponding to the edge of the battery cell, for example, the current collecting part may be formed in a bar shape to better suitably make electrical connection with the edge of the battery cell.

In addition, the bus bar portion may be formed in a stripe shape. The strip-shaped bus portions are not only beneficial to the arrangement of the battery pieces in a transverse and longitudinal alignment manner during typesetting, but also beneficial to the connection of the battery pieces during series connection and/or parallel connection.

Specifically, one or two current collecting portions may be located at one side of the long side of the bus bar portion. Because the current collecting part is used for being electrically connected with the battery pieces, one or two current collecting parts are arranged on one side of the current collecting part, and the gap between the adjacent battery pieces can be reduced, so that the illumination area of the photovoltaic module is increased, and the efficiency of the photovoltaic module is improved.

In addition, since the battery cell is electrically connected to the current collecting part and then connected in series and/or in parallel with other battery cells through the current collecting part, the current passing through the current collecting part is generally greater than that of the current collecting part. Therefore, the width of the bus bar portion is set to be greater than or equal to the width of the current collecting portion, and the thickness of the bus bar portion (i.e., the thickness of the base material) is greater than or equal to the thickness of the current collecting portion, thereby sufficiently improving the material utilization rate on the premise of ensuring a normal circuit.

It should be noted that the term "cell" as used herein includes a whole cell and a sliced cell formed by slicing a whole cell, such as an end cell of a stack of cells in a stack assembly, which is not distinguished in the present invention, and is collectively referred to as a "cell". In addition, in the following detailed description, the end cell of the stack string in the stack assembly is described as an example.

Specific embodiments of the electrical connection structure provided by various embodiments of the present invention are described in detail below with reference to fig. 3 to 7.

Fig. 3 is a schematic view of an electrical connection structure according to a first embodiment of the present invention. Referring to fig. 3, the electrical connection structure according to the first embodiment of the present invention includes one current collecting part 11, a bus bar part 12, and a connection part 13 connecting the current collecting part 11 and the bus bar part 12.

The current collecting portion 11 and the bus bar portion 12 are formed in long shapes. As described above, the current collecting portion 11 formed in the elongated shape may facilitate electrical connection with the battery sheet. The bus bar 12 is formed in a long bar shape to facilitate the arrangement of the battery pieces to realize the series connection and/or the parallel connection. However, the present invention is not particularly limited to the specific shapes of the current collecting part 11 and the bus bar part 12, and the shapes of the current collecting part 11 and the bus bar part 12 may be adjusted and changed according to the shape of the battery sheet and the arrangement of the battery sheet.

The current collecting portion 11 and the bus bar portion 12 are arranged substantially in parallel. When the cell pieces are arranged, the cell pieces are generally considered to be arranged in an aligned mode so as to increase the aesthetic property of the photovoltaic module. Based on this, the current collecting part 11 and the bus bar part 12 are arranged basically in parallel, and the serial connection and/or the parallel connection of the arranged battery pieces can be adapted. However, the present invention is not particularly limited to the specific relative positional relationship of the current collecting portion 11 and the bus bar portion 12, and for example, the current collecting portion 11 and the bus bar portion 12 may be provided not parallel to each other.

The connection portion 13 includes a plurality of connection portions 13 parallel to each other connecting the current collecting portion 11 and the bus bar portion 12. On the one hand, the connecting portion 13 is used to electrically connect the current collecting portion 11 and the bus bar portion 12, and on the other hand, the total area of the connecting portion 13 also directly affects the overall mechanical performance and the magnitude of the resistance of the electrical connection structure. Therefore, the number and size of the connection portions 13 can be appropriately adjusted by comprehensive consideration to select the total area of the connection portions 13. For example, as shown in fig. 3, 6 connection portions 13 are provided between the current collecting portion 11 and the bus bar portion 12, and the area of each connection portion 13 is small. Whereas, in the electrical connection structure provided by the second embodiment of the present invention shown in fig. 4, 2 connection portions are provided between the current collecting portion 11 and the bus bar portion 12, and the area of each connection portion 13 is large (to be described in detail later).

The connection portion 13 is disposed substantially perpendicular to the current collecting portion 11 and the bus bar portion 12. And the intervals between the plurality of connection parts 13 are equal to each other to contribute to the overall stability of the electrical connection structure. However, the present invention is not limited thereto.

Additionally, in one embodiment, the length of the bus bar portion 12 is greater than the length of the current collecting portion 11. When the battery pieces are connected in parallel with each other through the electrical connection structure, a portion of the bus bar portion 12 longer than the current collecting portion 11 may overlap with a bus bar portion of an adjacent electrical connection structure to form an overlapping portion, and electrical connection is achieved by welding the overlapping portion. In addition, the length of the bus bar portion of the adjacent another electrical connection structure may be equal to or less than the length of its own current collecting portion, as long as the adjacent two bus bar portions can be overlapped with each other and then electrically connected by soldering.

Fig. 4 is a schematic view of an electrical connection structure according to a second embodiment of the present invention. The electrical connection structure shown in fig. 4 is substantially similar to that shown in fig. 3 except that the structure of the connection portion 13 is different. The same structure will not be described repeatedly below, and the connecting portion 13 different in structure will be described in detail.

Specifically, in the electrical connection structure shown in fig. 4, two connection portions 13 are provided between the current collecting portion 11 and the bus bar portion 12, and the area of each connection portion 13 shown in fig. 4 is larger than the area of each connection portion 13 shown in fig. 3. Specifically, the area of each of the connection portions 13 shown in fig. 4 is substantially equal to 3 times the area of each of the connection portions 13 shown in fig. 3, so that the total area of the connection portions 13 shown in fig. 4 is substantially equal to the total area of the connection portions 13 shown in fig. 3.

Fig. 5 is a schematic view of an electrical connection structure according to a third embodiment of the present invention. Referring to fig. 5, the electrical connection structure provided by the third embodiment of the present invention includes two current collecting portions 11, a bus bar portion 12, and a connection portion 13. The two current collecting portions 11 are a first current collecting portion 111 and a second current collecting portion 112, respectively.

The first and second current collecting portions 111 and 112 and the bus bar portion 12 are formed in an elongated shape. As described above, the first current collecting portion 111 and the second current collecting portion 112 may be formed in the shape of long bars so as to be electrically connected to the battery sheet. The bus bar 12 may be formed in a long shape to facilitate the arrangement of the battery cells for series and/or parallel connection. However, the present invention is not particularly limited to the specific shapes of the first and second current collecting parts 111 and 112 and the bus bar part 12, and the shapes of the first and second current collecting parts 111 and 112 and the bus bar part 12 may be adjusted and changed according to the shape of the battery cell and the arrangement of the battery cell.

The first current collecting portion 111 and the second current collecting portion 112 are located on one side of the long side of the bus bar portion 12. Since the first current collecting portion 111 and the second current collecting portion 112 electrically connect different battery pieces, respectively (to be described in detail later), the first current collecting portion 111 and the second current collecting portion 112 are both disposed at one side of the long side of the bus bar portion 12, which may facilitate the arrangement and beauty of the battery pieces. However, the present invention is not limited thereto, and the relative positional relationship of the first and second collecting parts 111 and 112 and the bus bar part 12 may be adjusted and changed according to actual needs. In this case, the first current collecting portion 111 is closer to the bus bar portion 12 than the second current collecting portion 112. That is, the first current collecting portion 111 is closer to the bus bar portion 12, and the second current collecting portion 112 is farther from the bus bar portion 12. That is, the first current collecting portion 111 is located between the second current collecting portion 112 and the bus bar portion 12.

The first and second current collecting portions 111 and 112 and the bus bar portion 12 are arranged substantially in parallel. When the cell pieces are arranged, the cell pieces are generally considered to be arranged in an aligned mode so as to increase the aesthetic property of the photovoltaic module. Based on this, the first current collecting part 111, the second current collecting part 112 and the bus bar part 12 are arranged substantially in parallel, and the series connection and/or the parallel connection can be performed after the arrangement of the battery pieces is adapted. However, the present invention is not particularly limited to the specific relative positional relationship of the first and second current collecting portions 111 and 112 and the bus bar portion 12, and the first and second current collecting portions 111 and 112 and the bus bar portion 12 may also be disposed so as not to be parallel to each other.

The connection portion 13 includes a plurality of first connection portions 131 connecting the first current collecting portion 111 and the bus bar portion 12 and a plurality of second connection portions 132 connecting the first current collecting portion 111 and the second current collecting portion 112. That is, the first current collecting part 111 is directly connected to the bus bar part 12 through the plurality of first connection parts 131, and the second current collecting part 112 is directly connected to the first current collecting part 111 through the plurality of second connection parts 132, and then is indirectly connected to the bus bar part 12 through the first current collecting part 111 and the first connection parts 131.

Specifically, the second connection portion 132 extends from an end portion where the first connection portion 131 is connected to the first current collecting portion 111 to the second current collecting portion 112. That is, the first and second connection portions 131 and 132 are aligned with each other. However, the present invention is not limited thereto, and the first connection portion 131 and the second connection portion 132 may be disposed to be offset from each other.

In the embodiment shown in fig. 5, 6 first connection portions 131 are provided between the first collecting portion 111 and the bus bar portion 12. Likewise, 6 second connection portions 132, each aligned with the first connection portion 131, are also provided between the first and second current collecting portions 111 and 112. The first and second connection parts 131 and 132 have the same length and are equal to half the length of the connection part 13 shown in fig. 3 and 4. Each of the first connection portions 131 and each of the second connection portions 132 has the same width, and is equal to the width of each of the connection portions 13 shown in fig. 3 and equal to 1/3 of the width of each of the connection portions 13 shown in fig. 4. That is, the sum of the areas of each first connection portion 131 and each second connection portion 132 is equal to the area of each connection portion 13 shown in fig. 3 and equal to 1/3 of the area of each connection portion 13 shown in fig. 4. So that the total area of the connection portions 13 shown in fig. 5 is equal to the total area of the connection portions 13 shown in fig. 3 and 4. However, the present invention is not limited thereto, and the number and area of the connection parts 13 may be changed and adjusted according to the performance requirements of the photovoltaic module.

In addition, as described above, the first and second connection parts 131 and 132 shown in fig. 5 are shorter in length than the connection part 13 of fig. 3 and 4, and thus cause a large stress to the electrical connection structure shown in fig. 5, which is easily broken during transportation and assembly. Therefore, in the embodiment shown in fig. 5, the first current collecting portion 111 and the bus bar portion 12 may be disposed on the same plane, and the second current collecting portion 112 and the first current collecting portion 111 may be disposed on different planes. Specifically, as shown in fig. 6, the second current collecting portion 112 and the first current collecting portion 111 are formed in a step. Thereby, stress of the electrical connection structure shown in fig. 5 can be removed, thereby increasing mechanical properties of the electrical connection structure.

Specifically, as shown in fig. 5 and 6, a bend may be formed at a portion of the second connection portion 132 such that the second connection portion 132 is divided into a first portion 21 that is in the same plane as the first current collector 111, a second portion 22 that is in the same plane as the second current collector 112, and a third portion 23 that connects the first portion 21 and the second portion 22. In other embodiments, the second connection portion 132 may be integrally stepped such that only an end portion of the second connection portion 132 connected to the first collecting portion 111 is in the same plane as the first collecting portion 111, only an end portion connected to the second collecting portion 112 is in the same plane as the second collecting portion 112, and portions other than the two end portions are in different planes from both the first collecting portion 111 and the second collecting portion 112. However, the present invention is not limited thereto.

The first and second connection parts 131 and 132 are disposed substantially perpendicular to the first and second current collecting parts 111 and 112 and the bus bar part 12. And intervals between the plurality of first connection parts 131 and intervals between the plurality of second connection parts 132 are equal to each other. However, the present invention is not limited thereto.

Fig. 7 is a schematic view of an electrical connection structure according to a fourth embodiment of the present invention. Referring to fig. 7, an electrical connection structure provided by a fourth embodiment of the present invention includes two current collecting portions 11, a bus bar portion 12, and a connection portion 13. The two current collecting portions 11 are a first current collecting portion 111 and a second current collecting portion 112, respectively. The electrical connection structure shown in fig. 7 is substantially the same as the electrical connection structure shown in fig. 5 and 6, except that the first current collecting portion 111 and the connection portion 13 are different. The same structure will not be described repeatedly below, and the first current collecting portion 111 and the connection portion 13, which are different in structure, will be described in detail.

Specifically, the connection part 13 includes a third connection part 133 connecting the first current collecting part 111 and the bus bar part 12 and a fourth connection part 134 connecting the second current collecting part 112 and the bus bar part 12. And the first collecting portion 111 is formed with the penetration portion 14 through which the fourth connection portion 134 passes. That is, the first current collecting part 111 is directly connected to the bus bar part 12 through the third connection part 133, and the second current collecting part 112 is directly connected to the bus bar part 12 through the fourth connection part 134.

The first current collecting portion 111 is in the same plane as the bus bar portion 12 and the second current collecting portion 112 is in the same plane as the first current collecting portion 111. That is, the first collecting portion 111, the second collecting portion 112, and the bus bar portion 12 all lie on the same plane. In this case, the penetrating portion 14 formed on the first current collecting portion 111 may be a through hole penetrating the first current collecting portion 111, or the first current collecting portion 111 may be formed in a segmented form, and the penetrating portion 14 may be a gap between the segmented portions. The present invention is not limited thereto, and the penetration portion 14 may have any structure as long as the fourth connection portion 134 may pass therethrough to be directly connected with the bus bar portion 12.

In the electrical connection structure shown in fig. 7, because the length of the fourth connection portion 134 is relatively long, stress in the electrical connection structure can be well eliminated, and it is ensured that the electrical connection structure is not easily broken due to bending in the assembling and transporting processes, and therefore, the overall mechanical performance of the electrical connection structure can be enhanced. In this case, stress relief by providing the first and second current collecting parts 111 and 112 in a non-flush step structure in the electrical connection structure of fig. 5 and 6 may not be employed. However, the present invention is not limited thereto, and in other embodiments, the electrical connection structure shown in fig. 7 may also be provided with a stress-relief step structure shown in fig. 5 and 6 to further improve the mechanical performance of the electrical connection structure.

In the electrical connection structure shown in fig. 7, the third connection parts 133 and the fourth connection parts 134 are alternately disposed. That is, the third connection part 133, the fourth connection part 134, the third connection part 133, and the fourth connection part 134 are arranged in line in the length direction of the bus bar part 12 in this order, so that the connection force between the first and second current collecting parts 111 and 112 and the bus bar part 12 is uniformly distributed along the length direction of the bus bar part 12, thereby improving the overall mechanical properties and stability of the electrical connection structure shown in fig. 7.

A photovoltaic module according to an embodiment of the present invention includes the electrical connection structure provided in any of the above embodiments, and a plurality of cells connected in series and/or in parallel by a plurality of electrical connection structures. The photovoltaic module may have different embodiments based on the electrical connection structure provided by the different embodiments. The details are as follows.

Specific embodiments of the photovoltaic module provided by the present invention are described in detail below with reference to fig. 8 to 17.

Fig. 8 is a schematic diagram of parallel connection of cells of a photovoltaic module according to a fifth embodiment of the present invention.

Referring to fig. 8, a photovoltaic module according to a fifth embodiment of the present invention includes first and second electrical connection structures 2001 and 2002 and first and second cell strings 3001 and 3002 connected in parallel through the first and second electrical connection structures 2001 and 2002. Where the first battery string 3001 is a shingled battery string and includes a first cell sheet 1001 at an end and the second battery string 3002 is a shingled battery string and includes a second cell sheet 1002 at an end.

Wherein the first electrical connection structure 2001 and the second electrical connection structure 2002 may adopt any one or two of the electrical connection structure provided by the first embodiment of the present invention described above with reference to fig. 3, the electrical connection structure provided by the second embodiment of the present invention described with reference to fig. 4, the electrical connection structure provided by the third embodiment of the present invention described with reference to fig. 5 and 6, and the electrical connection structure provided by the fourth embodiment of the present invention described with reference to fig. 7. It is preferable to adopt the electrical connection structure provided in the first embodiment of the present invention and the electrical connection structure provided in the second embodiment of the present invention.

In the present embodiment, each of the first electrical connection structure 2001 and the second electrical connection structure 2002 adopts the electrical connection structure provided in the first embodiment of the present invention described above with reference to fig. 3, and the description will not be repeated here.

Among them, the first cell tab 1001 is electrically connected to the current collecting portion 11 of the first electrical connection structure 2001, the second cell tab 1002 is electrically connected to the current collecting portion 11 of the second electrical connection structure 2002, and the bus portion 12 of the first electrical connection structure 2001 is electrically connected to the bus portion 12 of the second electrical connection structure 2002, so that the first cell tab 1001 and the second cell tab 1002 are connected in parallel with each other, that is, the first cell tab 1001 and the second cell tab 1002 are connected in parallel with each other through the first electrical connection structure 2001 and the second electrical connection structure 2002, so that the first cell string 3001 and the second cell string 3002 are connected in parallel with each other.

In order to electrically connect the bus bar portion 12 of the first electrical connection structure 2001 to the bus bar portion 12 of the second electrical connection structure 2002, the sum of the lengths of the bus bar portion 12 of the first electrical connection structure 2001 and the bus bar portion 12 of the second electrical connection structure 2002 is greater than the sum of the lengths of the current collecting portion 11 of the first electrical connection structure 2001 and the current collecting portion 11 of the second electrical connection structure 2002. Specifically, the length of the bus bar portion 12 of either one or both of the first electrical connection structure 2001 and the second electrical connection structure 2002 is greater than the length of the corresponding current collecting portion 11, so that the bus bar portion 12 of the first electrical connection structure 2001 and the bus bar portion 12 of the second electrical connection structure 2002 can be overlapped with each other to be soldered for electrical connection. For example, the length of the bus bar portion 12 of the first electrical connection structure 2001 is greater than the length of the current collecting portion 11 of the first electrical connection structure 2001, and the length of the bus bar portion 12 of the second electrical connection structure 2002 is less than or equal to the length of the current collecting portion 11 of the second electrical connection structure 2002. In this way, the bus bar portion 12 of the first electrical connection structure 2001 may partially overlap the bus bar portion 12 of the second electrical connection structure 2002 by extending the current collecting portion 11, and the overlapping portion may be electrically connected by soldering.

The first cell tab 1001 is electrically connected to the current collecting part 11 of the first electrical connection structure 2001 through a conductive material, and the second cell tab 1002 is electrically connected to the current collecting part 11 of the second electrical connection structure 2002 through a conductive material. The conductive material can be conductive adhesive, conductive adhesive tape, solder paste, etc. The bus bar portion 12 of the first electrical connection structure 2001 may be electrically connected to the bus bar portion 12 of the second electrical connection structure 2002 by soldering.

Fig. 9 is a flow chart of a method of making the photovoltaic module shown in fig. 8. Referring to fig. 9, the method of manufacturing a photovoltaic module includes:

s101: first and second battery sheets 1001 and 1002 are provided, and in the present embodiment, first and second battery strings 3001 and 3002 are provided, the first battery string 3001 being a shingled battery string and including the first battery sheet 1001 at an end portion, and the second battery string 3002 being a shingled battery string and including the second battery sheet 1002 at an end portion.

S102: the first electrical connection structure 2001 and the second electrical connection structure 2002 are prepared, and the first electrical connection structure 2001 and the second electrical connection structure 2002 may adopt any one or two of the electrical connection structure provided in the first embodiment of the present invention described above with reference to fig. 3, the electrical connection structure provided in the second embodiment of the present invention described with reference to fig. 4, the electrical connection structure provided in the third embodiment of the present invention described with reference to fig. 5 and 6, and the electrical connection structure provided in the fourth embodiment of the present invention described with reference to fig. 7, and in this embodiment, the first electrical connection structure 2001 and the second electrical connection structure 2002 adopt the electrical connection structure provided in the first embodiment of the present invention described above with reference to fig. 3. Specifically, each of the first and second electrical connection structures 2001 and 2002 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, and the current collecting portion 11, the bus bar portion 12, and the connection portion 13 are integrally molded.

S103: the first battery tab 1001 is electrically connected to the current collecting portion 11 of the first electrical connection structure 2001, the second battery tab 1002 is electrically connected to the current collecting portion 11 of the second electrical connection structure 2002, and the bus portion 12 of the first electrical connection structure 2001 is electrically connected to the bus portion 12 of the second electrical connection structure 2002, so that the first battery tab 1001 and the second battery tab 1002 are connected in parallel with each other, that is, the first battery tab 1001 and the second battery tab 1002 are connected in parallel with each other through the first electrical connection structure 2001 and the second electrical connection structure 2002, so that the first battery string 3001 and the second battery string 3002 are connected in parallel with each other.

The first cell tab 1001 is electrically connected to the current collecting portion 11 of the first electrical connection structure 2001 through the conductive material 40, and the second cell tab 1002 is electrically connected to the current collecting portion 11 of the second electrical connection structure 2002 through the conductive material 40. The conductive material 40 may be conductive paste, conductive tape, solder paste, or the like. The bus bar portion 12 of the first electrical connection structure 2001 may be electrically connected to the bus bar portion 12 of the second electrical connection structure 2002 by soldering.

Fig. 10 is a schematic view of a photovoltaic module according to a sixth embodiment of the present invention, in which cells are connected in series; fig. 11 is a cross-sectional view along a-a of fig. 10.

Referring to fig. 10 to 11, the photovoltaic module may include third and fourth electrical connection structures 2003 and 2004 and third and fourth cell strings 3003 and 3004 connected in series through the third and fourth electrical connection structures 2003 and 2004. Wherein the third cell string 3003 is a shingled cell string and includes a third cell segment 1003 at an end, the fourth cell string 3004 is a shingled cell string and includes a fourth cell segment 1004 at an end,

wherein the third electrical connection structure 2003 and the fourth electrical connection structure 2004 may employ the electrical connection structure provided by the second embodiment of the present invention described above with reference to fig. 4. Specific structures of the third electrical connection structure 2003 and the fourth electrical connection structure 2004 may refer to the detailed description with reference to fig. 4 above, and a description thereof will not be repeated.

Specifically, the third cell 1003 is electrically connected to the current collecting portion 11 of the third electrical connection structure 2003, the fourth cell 1004 is electrically connected to the current collecting portion 11 of the fourth electrical connection structure 2004, and the bus bar portion 12 of the fourth electrical connection structure 2004 is electrically connected to the connection portion 13 of the third electrical connection structure 2003, wherein the polarity of the electrode electrically connected to the current collecting portion 11 of the third electrical connection structure 2003 through the third cell 1003 is opposite to the polarity of the electrode electrically connected to the current collecting portion 11 of the fourth electrical connection structure 2004 through the fourth cell 1004, so that the third cell 1003 and the fourth cell 1004 are connected in series with each other, that is, the third cell string 3003 and the fourth cell string 3004 are connected in series with each other.

In the present embodiment, the third electrical connection structure 2003 may be structurally different from the fourth electrical connection structure 2004.

For example, the length of the connection part 13 of the third electrical connection structure 2003 is greater than the length of the connection part 13 of the fourth electrical connection structure 2004, so that the bus bar part 12 of the fourth electrical connection structure 2004 may contact the connection part 13 of the third electrical connection structure 2003 after the third battery cell 1003 and the fourth battery cell 1004 are connected in series, and thus, electrical connection with each other may be achieved. Thereby, the bus bar portion 12 of the third electrical connection structure 2003 and the bus bar portion 12 of the fourth electrical connection structure 2004 are offset from each other, specifically, the bus bar portion 12 of the third electrical connection structure 2003 is closer to the fourth cell plate 1004 and the bus bar portion 12 of the fourth electrical connection structure 2004 is closer to the third cell plate 1003.

In addition, in order to prevent the connection portion 13 of the third electrical connection structure 2003 and the connection portion 13 of the fourth electrical connection structure 2004 from overlapping each other when the third electrical connection structure 2003 and the fourth electrical connection structure 2004 are electrically connected, so that the thickness of the assembly is increased, which is disadvantageous for stacking, the interval between the two connection portions 13 of the third electrical connection structure 2003 is not equal to the interval between the two connection portions 13 of the fourth electrical connection structure 2004. For example, the interval between the two connection parts 13 of the third electrical connection structure 2003 is greater than the interval between the two connection parts 13 of the fourth electrical connection structure 2004, so that the connection parts 13 of the third electrical connection structure 2003 and the connection parts of the fourth electrical connection structure 2004 are offset from each other when the series connection is formed.

The rear surface of the third cell 1003 is electrically connected to the front surface of the current collecting portion 11 of the third electrical connection structure 2003 through the conductive material 40, the front surface of the fourth cell 1004 is electrically connected to the rear surface of the current collecting portion 11 of the fourth electrical connection structure 2004 through the conductive material 40, and the front surface of the bus bar portion 12 of the fourth electrical connection structure 2004 is in contact with the rear surface of the connection portion 13 of the third electrical connection structure 2003 and is electrically connected by soldering or a conductive material.

The photovoltaic module of the embodiment can reduce welding spots required by the series connection of the cells, simplify the preparation process and improve the yield of the photovoltaic module.

Fig. 12 is a flow chart of a method of making the photovoltaic module shown in fig. 10. Referring to fig. 12, the method of manufacturing a photovoltaic module includes:

s201: a third cell 1003 and a fourth cell 1004 are provided, in this embodiment, a third cell string 3003 and a fourth cell string 3004 are provided, the third cell string 3003 being a shingled cell string and including the third cell 1003 at an end, the fourth cell string 3004 being a shingled cell string and including the fourth cell 1004 at an end.

S202: the third and fourth electrical connection structures 2003 and 2004 are prepared, and the third and fourth electrical connection structures 2003 and 2004 adopt the electrical connection structure provided in the second embodiment of the present invention described above with reference to fig. 4, and thus, a detailed description of the third and fourth electrical connection structures 2003 and 2004 is omitted herein.

S203: the third cell 1003 is electrically connected to the current collecting portion 11 of the third electrical connection structure 2003, the fourth cell 1004 is electrically connected to the current collecting portion 11 of the fourth electrical connection structure 2004, and the bus bar portion 12 of the fourth electrical connection structure 2004 is electrically connected to the connection portion 13 of the third electrical connection structure 2003, wherein the polarity of the electrode electrically connected to the current collecting portion 11 of the third electrical connection structure 2003 through the third cell 1003 and the polarity of the electrode electrically connected to the current collecting portion 11 of the fourth electrical connection structure 2004 through the fourth cell 1004 are opposite, so that the third cell 1003 and the fourth cell 1004 are connected in series with each other, that is, the third cell string 3003 and the fourth cell string 3004 are connected in series with each other.

The rear surface of the third cell 1003 is electrically connected to the front surface of the current collecting portion 11 of the third electrical connection structure 2003 through the conductive material 40, the front surface of the fourth cell 1004 is electrically connected to the rear surface of the current collecting portion 11 of the fourth electrical connection structure 2004 through the conductive material 40, and the front surface of the bus bar portion 12 of the fourth electrical connection structure 2004 is in contact with the rear surface of the connection portion 13 of the third electrical connection structure 2003 and is electrically connected by soldering or a conductive material.

Fig. 13 is a schematic diagram of series-parallel connection of cells of a photovoltaic module according to a seventh embodiment of the invention.

Referring to fig. 13, a photovoltaic module according to a seventh embodiment of the present invention includes a fifth electrical connection structure 2005, a sixth electrical connection structure 2006, a seventh electrical connection structure 2007 and an eighth electrical connection structure 2008, and a fifth cell string 3005, a sixth cell string 3006, a seventh cell string 3007 and an eighth cell string 3008 connected in series and parallel through the fifth electrical connection structure 2005, the sixth electrical connection structure 2006 and the seventh electrical connection structure 2007. The fifth battery string 3005 is a shingled battery string and includes a fifth battery tab 1005 at an end, the sixth battery string 3006 is a shingled battery string and includes a sixth battery tab 1006 at an end, the seventh battery string 3007 is a shingled battery string and includes a seventh battery tab 1007 at an end, and the eighth battery string 3008 is a shingled battery string and includes an eighth battery tab 1008 at an end.

Among them, the fifth electrical connection structure 2005, the sixth electrical connection structure 2006, the seventh electrical connection structure 2007 and the eighth electrical connection structure 2008 may adopt the electrical connection structure provided in the second embodiment of the present invention described above with reference to fig. 4, and a description thereof will not be repeated.

The fifth cell piece 1005 is electrically connected to the current collecting portion 11 of the fifth electrical connection structure 2005, the sixth cell piece 1006 is electrically connected to the current collecting portion 11 of the sixth electrical connection structure 2006, and the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the connection portion 13 of the fifth electrical connection structure 2005, wherein the polarity of the electrode electrically connected to the current collecting portion 11 of the fifth electrical connection structure 2005 of the fifth cell piece 1005 is opposite to the polarity of the electrode electrically connected to the current collecting portion 11 of the sixth electrical connection structure 2006, so that the fifth cell piece 1005 and the sixth cell piece 1006 are connected in series with each other, that is, the fifth cell string 3005 and the sixth cell string 3006 are connected in series with each other to form a new cell string_a。

The seventh cell piece 1007 is electrically connected to the current collecting portion 11 of the seventh electrical connection structure 2007, the eighth cell piece 1008 is electrically connected to the current collecting portion 11 of the eighth electrical connection structure 2008, and the bus bar portion 12 of the eighth electrical connection structure 2008 is electrically connected to the connection portion 13 of the seventh electrical connection structure 2007, wherein the polarity of the electrode electrically connected to the current collecting portion 11 of the seventh electrical connection structure 2007 of the seventh cell piece 1007 and the polarity of the electrode electrically connected to the current collecting portion 11 of the eighth electrical connection structure 2008 of the eighth cell piece 1008 are opposite, so that the seventh cell piece 1007 and the eighth cell piece 1008 are connected in series with each other, that is, the seventh cell string 3007 and the eighth cell string 3008 are connected in series with each other to form a new cell string b.

The bus bar portion 12 of the fifth electrical connection structure 2005 is electrically connected to the bus bar portion 12 of the seventh electrical connection structure 2007, and the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the bus bar portion 12 of the eighth electrical connection structure 2008, so that the battery string_aAnd the battery string b are connected in parallel with each other.

Specifically, the rear surface of the fifth cell sheet 1005 is electrically connected to the front surface of the current collecting portion 11 of the fifth electrical connection structure 2005 through the conductive material 40, the front surface of the sixth cell sheet 1006 is electrically connected to the rear surface of the current collecting portion 11 of the sixth electrical connection structure 2006 through the conductive material 40, and the front surface of the bus bar portion 12 of the sixth electrical connection structure 2006 is in contact with the rear surface of the connection portion 13 of the fifth electrical connection structure 2005 and is electrically connected by soldering or a conductive material.

The rear surface of the seventh cell sheet 1007 is electrically connected to the front surface of the current collecting portion 11 of the seventh electrical connection structure 2007 through the conductive material 40, the front surface of the eighth cell sheet 1008 is electrically connected to the rear surface of the current collecting portion 11 of the eighth electrical connection structure 2008 through the conductive material 40, and the front surface of the bus bar portion 12 of the eighth electrical connection structure 2008 is in contact with the rear surface of the connection portion 13 of the seventh electrical connection structure 2007 and is electrically connected by welding or a conductive material.

The sum of the lengths of the bus bar portion 12 of the fifth electrical connection structure 2005 and the bus bar portion 12 of the seventh electrical connection structure 2007 is greater than the sum of the lengths of the current collecting portion 11 of the fifth electrical connection structure 2005 and the current collecting portion 11 of the seventh electrical connection structure 2007.

Taking the electrical connection between the bus bar portion 12 of the fifth electrical connection structure 2005 and the bus bar portion 12 of the seventh electrical connection structure 2007 as an example, the length of the bus bar portion 12 of the fifth electrical connection structure 2005 may be greater than the length of the current collecting portion 11 of the fifth electrical connection structure 2005, and the length of the bus bar portion 12 of the seventh electrical connection structure 2007 may be less than or equal to the length of the current collecting portion 11 of the seventh electrical connection structure 2007, so that the bus bar portion 12 of the fifth electrical connection structure 2005 may be lapped on the bus bar portion 12 of the seventh electrical connection structure 2007 to form an overlapping portion, and then the electrical connection is achieved by soldering. However, the present invention is not limited thereto, and for example, the length of the bus bar part 12 of the fifth electrical connection structure 2005 may be less than or equal to the length of the current collecting part 11 of the fifth electrical connection structure 2005, and the length of the bus bar part 12 of the seventh electrical connection structure 2007 may be greater than the length of the current collecting part 11 of the seventh electrical connection structure 2007, as long as the bus bar parts of two electrical connection structures adjacent in parallel may overlap each other and then be electrically connected by soldering. The length relationship between the bus bar portion 12 of the sixth electrical connection structure 2006 and the bus bar portion 12 of the eighth electrical connection structure 2008 can refer to the length relationship between the bus bar portion 12 of the fifth electrical connection structure 2005 and the bus bar portion 12 of the seventh electrical connection structure 2007, which are described above, as long as the bus bar portion 12 of the sixth electrical connection structure 2006 and the bus bar portion 12 of the eighth electrical connection structure 2008 can be overlapped with each other, so that electrical connection is achieved by soldering.

In addition, in the present embodiment, the fifth electrical connection structure 2005 may be different in structure from the sixth electrical connection structure 2006.

For example, the length of the connection part 13 of the fifth electrical connection structure 2005 is greater than the length of the connection part 13 of the sixth electrical connection structure 2006, so that the bus bar part 12 of the sixth electrical connection structure 2006 may contact the connection part 13 of the fifth electrical connection structure 2005 after the fifth and sixth battery sheets 1005 and 1006 are connected in series, thereby being electrically connected to each other. Thereby, the bus bar portion 12 of the fifth electrical connection structure 2005 and the bus bar portion 12 of the sixth electrical connection structure 2006 are offset from each other, and specifically, the bus bar portion 12 of the fifth electrical connection structure 2005 is closer to the sixth cell sheet 1006, and the bus bar portion 12 of the sixth electrical connection structure 2006 is closer to the fifth cell sheet 1005.

In addition, in order to prevent the connection part 13 of the fifth electrical connection structure 2005 and the connection part 13 of the sixth electrical connection structure 2006 from overlapping each other when the fifth electrical connection structure 2005 and the sixth electrical connection structure 2006 are electrically connected, so that the thickness of the assembly is increased, which is disadvantageous for lamination, an interval between the two connection parts 13 of the fifth electrical connection structure 2005 and an interval between the two connection parts 13 of the sixth electrical connection structure 2006 are not equal. For example, the interval between the two connection parts 13 of the fifth electrical connection structure 2005 is greater than the interval between the two connection parts 13 of the sixth electrical connection structure 2006.

The seventh electrical connection structure 2007 corresponds to the fifth electrical connection structure 2005, and the eighth electrical connection structure 2008 corresponds to the sixth electrical connection structure 2006. The description will not be repeated here.

After the fifth battery string 3005, the sixth battery string 3006, the seventh battery string 3007, and the eighth battery string 3008 are connected in series-parallel by the series-parallel method, edges of the fifth battery string 3005, the sixth battery string 3006, the seventh battery string 3007, and the eighth battery string 3008 also need to be connected in parallel with each other. Specifically, the edge cell piece 200 of the fifth cell string 3005 and the edge cell piece 200 of the seventh cell string 3007 are connected in parallel to each other through the two edge electrical connection structures 100. The edge cell piece 200 of the sixth cell string 3006 and the edge cell piece 200 of the eighth cell string 3008 are connected in parallel with each other through the two edge electrical connection structures 100. The parallel connection mode of the edge cell pieces 200 can refer to the parallel connection mode of the photovoltaic module provided by the fifth embodiment of the invention in the above fig. 8. Specifically, the left side edge cell piece 200 of the fifth cell string 3005 is electrically connected to the current collecting portion 11 of the edge electrical connection structure 100, the right side edge cell piece 200 of the sixth cell string 3006 is electrically connected to the current collecting portion 11 of the edge electrical connection structure 100, the left side edge cell piece 200 of the seventh cell string 3007 is electrically connected to the current collecting portion 11 of the edge electrical connection structure 100, the right side edge cell piece 200 of the eighth cell string 3008 is electrically connected to the current collecting portion 11 of the edge electrical connection structure 100, then the bus portion 12 of the left side edge electrical connection structure 100 of the fifth cell piece is electrically connected to the bus portion 12 of the left side edge electrical connection structure 100 of the seventh cell piece, and the bus portion 12 of the right side edge electrical connection structure 100 of the sixth cell piece is electrically connected to the bus portion 12 of the right side edge electrical connection structure 100 of the eighth cell piece.

The edge electrical connection structure 100 may employ any one of the electrical connection structures provided above with reference to the first embodiment of the present invention in fig. 3, the electrical connection structure provided with reference to the second embodiment of the present invention in fig. 4, the electrical connection structure provided with reference to the third embodiment of the present invention in fig. 5, and the electrical connection structure provided with reference to the fourth embodiment of the present invention in fig. 7. In this embodiment, the edge electrical connection structure 100 may adopt the electrical connection structure provided above with reference to fig. 4 according to the second embodiment of the present invention.

More specifically, in the present embodiment, the edge electrical connection structure 100 on the right side of the sixth cell string 3006 and the edge electrical connection structure 100 on the right side of the eighth cell string 3008 may have the same structure as the fifth electrical connection structure 2005 and the seventh electrical connection structure 2007, and the edge electrical connection structure 100 on the left side of the fifth cell string 3005 and the edge electrical connection structure 100 on the left side of the seventh cell string 3007 may have the same structure as the sixth electrical connection structure 2006 and the eighth electrical connection structure 2008.

The above illustrates an example in which the photovoltaic module includes four cell strings. The present invention is not limited thereto and the photovoltaic module may further include more than four cell strings, and the more than four cell strings may be connected in series and/or in parallel in the manner described with reference to the present embodiment.

The fifth cell tab 1005 is electrically connected to the current collecting portion 11 of the fifth electrical connection structure 2005 by the conductive material 40, the sixth cell tab 1006 is electrically connected to the current collecting portion 11 of the sixth electrical connection structure 2006 by the conductive material 40, the seventh cell tab 1007 is electrically connected to the current collecting portion 11 of the seventh electrical connection structure 2007 by the conductive material 40, the eighth cell tab 1008 is electrically connected to the current collecting portion 11 of the eighth electrical connection structure 2009 by the conductive material 40, the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the connection portion 13 of the fifth electrical connection structure 2005 by welding and/or the conductive material, the bus bar portion 12 of the eighth electrical connection structure 2008 is electrically connected to the connection portion 13 of the seventh electrical connection structure 2007 by welding and/or the conductive material, the bus bar portion 12 of the fifth electrical connection structure is electrically connected to the bus bar portion 12 of the seventh electrical connection structure 2007 by welding, and the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the bus bar portion 12 of the eighth electrical connection structure 2008 by welding.

Comparing fig. 2 and 13, the end of the photovoltaic module is reduced from four welding spots to one welding spot, and the middle position is reduced from eight welding spots to six welding spots. Therefore, the photovoltaic module provided by the embodiment of the invention can reduce welding spots, thereby reducing the possibility of hidden cracks and splinters and improving the production efficiency and the production quality.

Fig. 14 is a flow chart of a method of making the photovoltaic module shown in fig. 13. Referring to fig. 14, the method of manufacturing a photovoltaic module includes:

s301: a fifth cell 1005, a sixth cell 1006, a seventh cell 1007, and an eighth cell 1008 are provided, in this embodiment, a fifth cell string 3005, a sixth cell string 3006, a seventh cell string 3007, and an eighth cell string 3008 are provided, wherein the fifth cell string 3005 is a shingled cell string and includes the fifth cell 1005 at an end, the sixth cell string 3006 is a shingled cell string and includes the sixth cell 1006 at an end, the seventh cell string 3007 is a shingled cell string and includes the seventh cell 1007 at an end, and the eighth cell string 3008 is a shingled cell string and includes the eighth cell 1008 at an end.

S302: the fifth, sixth, seventh and eighth electrical connection structures 2005, 2006, 2007 and 2008 are prepared, the fifth, sixth, seventh and eighth electrical connection structures 2005, 2006, 2007 and 2008 employ the electrical connection structure provided by the second embodiment of the present invention described above with reference to fig. 4, and specifically, the structure described above with reference to fig. 13 may be referred to, and thus, a detailed description thereof is omitted herein.

S303: electrically connecting the fifth cell piece 1005 with the current collecting part 11 of the fifth electrical connection structure 2005, electrically connecting the sixth cell piece 1006 with the current collecting part 11 of the sixth electrical connection structure 2006, and electrically connecting the bus bar part 12 of the sixth electrical connection structure 2006 with the connection part 13 of the fifth electrical connection structure 2005, wherein the polarity of the electrode electrically connecting the fifth cell piece 1005 with the current collecting part 11 of the fifth electrical connection structure 2005 is opposite to the polarity of the electrode electrically connecting the sixth cell piece 1006 with the current collecting part 11 of the sixth electrical connection structure 2006, such that the fifth cell piece 1005 and the sixth cell piece 1006 are connected in series with each other, i.e., the fifth cell string 3005 and the sixth cell string 3006 are connected in series with each other to form a new cell string_a。

S304: the seventh cell piece 1007 is electrically connected with the current collecting portion 11 of the seventh electrical connection structure 2007, the eighth cell piece 1008 is electrically connected with the current collecting portion 11 of the eighth electrical connection structure 2008, and the bus bar portion 12 of the eighth electrical connection structure 2008 is electrically connected with the connection portion 13 of the seventh electrical connection structure 2007, wherein the polarity of the electrode of the seventh cell piece 1007 electrically connected with the current collecting portion 11 of the seventh electrical connection structure 2007 is opposite to the polarity of the electrode of the eighth cell piece 1008 electrically connected with the current collecting portion 11 of the eighth electrical connection structure 2008, so that the seventh cell piece 1007 and the eighth cell piece 1008 are connected in series with each other, that is, the seventh cell string 3007 and the eighth cell string 3008 are connected in series with each other to form a new cell string b.

S305: the bus bar portion 12 of the fifth electrical connection structure 2005 is electrically connected to the bus bar portion 12 of the seventh electrical connection structure 2007, and the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the bus bar portion 12 of the eighth electrical connection structure 2008.

Fig. 15 is a schematic view of a photovoltaic module according to an eighth embodiment of the present invention, wherein the photovoltaic module comprises cells connected in series; fig. 16 is a cross-sectional view taken along B-B of fig. 15.

Referring to fig. 15 to 16, the photovoltaic module may include a ninth electrical connection structure 2009 and a ninth cell string 3009 and a tenth cell string 3010 connected in series by the ninth electrical connection structure 2009. Ninth cell string 3009 is a laminated cell string and includes ninth cell plate 1009 at the end, and tenth cell string 3010 is a laminated cell string and includes tenth cell plate 1010 at the end.

The ninth electrical connection structure 2009 may employ the electrical connection structure provided by the first embodiment of the present invention described above with reference to fig. 3 or the electrical connection structure provided by the second embodiment of the present invention described above with reference to fig. 4. In the present embodiment, the ninth electrical connection structure 2009 is the electrical connection structure provided by the first embodiment of the present invention described above with reference to fig. 3, and the specific structure thereof will not be described repeatedly.

The ninth cell tab 1009 is electrically connected to the first face of the current collector 11 of the ninth electrical connection structure 2009, the tenth cell tab 1010 is electrically connected to the second face of the current collector 11 of the ninth electrical connection structure 2009 opposite to the first face, and the electrode polarity at the electrical connection of the ninth cell tab 1009 to the first face of the current collector 11 of the ninth electrical connection structure 2009 and the electrode polarity at the electrical connection of the tenth cell tab 1010 to the second face of the current collector 11 of the tenth electrical connection structure 2010 are opposite, so that the ninth cell tab 1009 and the tenth cell tab 1010 are connected in series with each other.

Specifically, the rear surface of the ninth cell sheet 1009 is electrically connected to the first surface (front surface) of the current collecting portion 11 of the ninth electrical connection structure 2009 through the conductive material 40, and the front surface of the tenth cell sheet 1010 is electrically connected to the second surface (rear surface) of the current collecting portion 11 of the ninth electrical connection structure 2009 through the wire material 40.

According to the photovoltaic module provided by the embodiment, the welding spots are reduced, the preparation process of the photovoltaic module is simplified, and the yield of the photovoltaic module is improved.

In addition, according to the photovoltaic module provided by the embodiment, through the electric connection structure, a negative distance can be formed between the battery pieces which are connected in series, so that the attractiveness of the photovoltaic module is improved.

Fig. 17 is a flow chart of a method of making the photovoltaic module shown in fig. 15. Referring to fig. 17, the method of manufacturing a photovoltaic module includes:

s401: a ninth cell 1009 and a tenth cell 1010 are provided, in this embodiment a ninth cell string 3009 and a tenth cell string 3010 are provided, the ninth cell string 3009 being a shingled cell string and including the ninth cell 1009 at an end, the tenth cell string 3010 being a shingled cell string and including the tenth cell 1010 at an end.

S402: a ninth electrical connection structure 2009 is prepared, and the ninth electrical connection structure 2009 may adopt the electrical connection structure provided by the first embodiment of the present invention described above with reference to fig. 3, and thus, a detailed description thereof is omitted herein.

S403: electrically connecting the ninth cell plate 1009 with the first face of the ninth electrical connection structure 2009, and electrically connecting the tenth cell plate 1010 with the second face of the ninth electrical connection structure 2009 opposite to the first face, wherein the polarity of the electrode where the ninth cell plate 1009 is electrically connected with the first face of the ninth electrical connection structure 2009 is opposite to the polarity of the electrode where the tenth cell plate 1010 is electrically connected with the second face of the tenth electrical connection structure 2010, so that the ninth cell plate 1009 and the tenth cell plate 1010 are connected in series with each other.

Fig. 18 is a schematic diagram of series-parallel connection of cells of a photovoltaic module according to a ninth embodiment of the invention.

Referring to fig. 18, the photovoltaic module includes tenth and eleventh electrical connection structures 2010 and 2011 and eleventh, twelfth, thirteenth and fourteenth battery strings 3011, 3012, 3013 and 3014 connected in series and parallel through the tenth and eleventh electrical connection structures 2010 and 2011, the eleventh battery string 3011 being a shingled battery string and including an eleventh cell 1011 at an end, the twelfth battery string 3012 being a shingled battery string and including a twelfth cell 1012 at an end, the thirteenth battery string 3013 being a shingled battery string and including a thirteenth cell 1013 at an end, the fourteenth battery string 3014 being a shingled battery string and including a fourteenth cell 1014 at an end.

The tenth electrical connection structure 2010 and the eleventh electrical connection structure 2011 may employ the electrical connection structure provided by the first embodiment of the present invention described above with reference to fig. 3 or the electrical connection structure provided by the second embodiment of the present invention described above with reference to fig. 4. In the present embodiment, the tenth electrical connection structure 2010 and the eleventh electrical connection structure 2011 are the electrical connection structures provided in the first embodiment of the present invention described above with reference to fig. 3, and the specific structures thereof are not described repeatedly.

The eleventh cell tab 1011 is electrically connected to the first face of the current collecting portion 11 of the tenth electrical connection structure 2010, the twelfth cell tab 1012 is electrically connected to the second face of the current collecting portion 11 of the tenth electrical connection structure 2010, and the polarity of the electrode at the electrical connection site of the eleventh cell tab 1011 and the first face of the current collecting portion 11 of the tenth electrical connection structure 2010 is opposite to the polarity of the electrode at the electrical connection site of the twelfth cell tab 1012 and the second face of the current collecting portion 11 of the tenth electrical connection structure 2010, such that the eleventh cell string 3011 and the twelfth cell string 3012 are connected in series to form a new cell string_c。

The thirteenth cell sheet 1013 is electrically connected to the first surface of the current collecting portion 11 of the eleventh electrical connection structure 2011, the fourteenth cell sheet 1014 is electrically connected to the second surface of the current collecting portion 11 of the eleventh electrical connection structure 2011, and the polarity of the electrode at the electrical connection position of the thirteenth cell sheet 1013 to the first surface of the current collecting portion 11 of the eleventh electrical connection structure 2011 is opposite to the polarity of the electrode at the electrical connection position of the fourteenth cell sheet 1014 to the second surface of the current collecting portion 11 of the eleventh electrical connection structure 2011, so that the thirteenth cell string 3013 and the fourteenth cell string 3014 are connected in series to each other to form a new cell string d.

The bus part 12 of the tenth electrical connection structure 2010 is electrically connected with the bus part 12 of the eleventh electrical connection structure 2011 such that the battery string_cAnd the battery string d in parallel.

Specifically, the rear surface of the eleventh battery sheet 1011 is electrically connected to the first surface (front surface) of the current collecting part 11 of the tenth electrical connection structure 2010 through the conductive material 40, and the front surface of the twelfth battery sheet 1012 is electrically connected to the second surface (rear surface) of the current collecting part 11 of the tenth electrical connection structure 2010 through the conductive material 40. The back surface of the thirteenth cell 1013 is electrically connected to the first surface (front surface) of the current collecting portion 11 of the eleventh electrical connection structure 2011 through the conductive material 40, and the front surface of the fourteenth cell 1014 is electrically connected to the second surface (back surface) of the current collecting portion 11 of the eleventh electrical connection structure 2011 through the conductive material 40. The bus bar part 12 of the tenth electrical connection structure 2010 is electrically connected to the bus bar part 12 of the eleventh electrical connection structure 2011 by soldering.

The sum of the lengths of the bus portion 12 of the tenth electrical connection structure 2010 and the bus portion of the eleventh electrical connection structure 2011 is greater than the sum of the lengths of the current collecting portion 11 of the tenth electrical connection structure 2010 and the current collecting portion 11 of the eleventh electrical connection structure 2011.

For example, the length of the bus bar part 12 of the tenth electrical connection structure 2010 may be greater than the length of the current collecting part 11 of the tenth electrical connection structure 2010, and the length of the bus bar part 12 of the eleventh electrical connection structure 2011 may be less than or equal to the length of the current collecting part 11 of the eleventh electrical connection structure 2011, so that the bus bar part 12 of the tenth electrical connection structure 2010 may be overlapped on the bus bar part 12 of the eleventh electrical connection structure 2011 to form an overlapped portion, and then electrical connection is achieved by soldering. However, the present invention is not limited thereto, for example, the length of the bus bar part 12 of the tenth electrical connection structure 2010 may be less than or equal to the length of the current collecting part 11 of the tenth electrical connection structure 2010, and the length of the bus bar part 12 of the eleventh electrical connection structure 2011 may be greater than the length of the current collecting part 11 of the eleventh electrical connection structure 2011, as long as the bus bar parts of two electrical connection structures adjacent in parallel may overlap each other and then be electrically connected by soldering.

After the eleventh cell string 3011, the twelfth cell string 3012, the thirteenth cell string 3013 and the fourteenth cell string 3014 are connected in series and parallel in the above-described manner, edges of the eleventh cell string 3011, the twelfth cell string 3012, the thirteenth cell string 3013 and the fourteenth cell string 3014 also need to be connected in parallel with each other. Specifically, the edge cell piece 200 of the eleventh cell string 3011 and the edge cell piece 200 of the thirteenth cell string 3013 are connected in parallel to each other through two edge electrical connection structures 100. The edge cell piece 200 of the twelfth cell string 3012 and the edge cell piece 200 of the fourteenth cell string 3014 are connected in parallel to each other through two edge electrical connection structures 100. The parallel connection mode of the edge cells 200 can be the parallel connection mode of the photovoltaic module provided by the fifth embodiment of the invention in the above fig. 8 or the parallel connection mode of the edge cells of the photovoltaic module provided by the seventh embodiment of the invention in the above fig. 13, and the description is not repeated here.

The edge electrical connection structure may employ any one of the electrical connection structure provided in the first embodiment of the present invention with reference to fig. 3, the electrical connection structure provided in the second embodiment of the present invention with reference to fig. 4, the electrical connection structure provided in the third embodiment of the present invention with reference to fig. 5, and the electrical connection structure provided in the fourth embodiment of the present invention with reference to fig. 7. In this embodiment, the edge electrical connection structure 100 may adopt the electrical connection structure provided above with reference to fig. 4 according to the second embodiment of the present invention.

The above illustrates an example in which the photovoltaic module includes four cell strings. The present invention is not limited thereto and the photovoltaic module may further include more than four cell strings, and the more than four cell strings may be connected in series and/or in parallel in the manner described with reference to the present embodiment.

Comparing fig. 2 and 18, the end of the photovoltaic module is reduced from four welding points to one welding point, and the middle position is reduced from eight welding points to one welding point. Therefore, the photovoltaic module provided by the embodiment of the invention can reduce welding spots, thereby reducing the possibility of hidden cracks and splinters and improving the production efficiency and the production quality.

In addition, according to the photovoltaic module provided by the embodiment, through the electric connection structure, a negative distance can be formed between the battery pieces which are connected in series, so that the attractiveness of the photovoltaic module is improved.

Fig. 19 is a flow chart of a method of making the photovoltaic module described in fig. 18. Referring to fig. 19, the method of manufacturing a photovoltaic module includes:

s501: an eleventh cell 1011, a twelfth cell 1012, a thirteenth cell 1013, and a fourteenth cell 1014 are provided, and in the present embodiment, an eleventh cell string 3011, a twelfth cell string 3012, a thirteenth cell string 3013, and a fourteenth cell string 3014 are provided, the eleventh cell string 3011 being a shingled cell string and including the eleventh cell 1011 at an end portion, the twelfth cell string 3012 being a shingled cell string and including the twelfth cell 1012 at an end portion, the thirteenth cell string 3013 being a shingled cell string and including the thirteenth cell 1013 at an end portion, and the fourteenth cell string 3014 being a shingled cell string and including the fourteenth cell 1014 at an end portion.

S502: the tenth and eleventh electrical connection structures 2010 and 2011, which are prepared, may employ the electrical connection structure provided in the first embodiment of the present invention described above with reference to fig. 3, and thus, a detailed description thereof is omitted herein.

S503: the eleventh cell 1011 is electrically connected to the first side of the current collecting part 11 of the tenth electrical connection structure 2010, and the twelfth cell 1012 is electrically connected to the second side of the current collecting part 11 of the tenth electrical connection structure 2010, wherein the polarity of the electrode at the electrical connection site of the eleventh cell 1011 to the first side of the current collecting part 11 of the tenth electrical connection structure 2010 is opposite to the polarity of the electrode at the electrical connection site of the twelfth cell 1012 to the second side of the current collecting part 11 of the tenth electrical connection structure 2010.

S504: a thirteenth cell sheet 1013 is electrically connected to the first surface of the current collecting portion 11 of the eleventh electrical connection structure 2011, and a fourteenth cell sheet 1014 is electrically connected to the second surface of the current collecting portion 11 of the eleventh electrical connection structure 2011, wherein the polarity of the electrode at the electrical connection position of the thirteenth cell sheet 1013 and the first surface of the current collecting portion 11 of the eleventh electrical connection structure 2011 is opposite to the polarity of the electrode at the electrical connection position of the fourteenth cell sheet 1014 and the second surface of the current collecting portion 11 of the eleventh electrical connection structure 2011.

S505: the bus part 12 of the tenth electrical connection structure 2010 is electrically connected with the bus part 12 of the eleventh electrical connection structure 2011.

Specifically, the rear surface of the eleventh battery sheet 1011 is electrically connected to the first surface (front surface) of the current collecting part 11 of the tenth electrical connection structure 2010 through the conductive material 40, and the front surface of the twelfth battery sheet 1012 is electrically connected to the second surface (rear surface) of the current collecting part 11 of the tenth electrical connection structure 2010 through the conductive material 40. The back surface of the thirteenth cell 1013 is electrically connected to the first surface (front surface) of the current collecting portion 11 of the eleventh electrical connection structure 2011 through the conductive material 40, and the front surface of the fourteenth cell 1014 is electrically connected to the second surface (back surface) of the current collecting portion 11 of the eleventh electrical connection structure 2011 through the conductive material 40. The bus bar part 12 of the tenth electrical connection structure 2010 is electrically connected to the bus bar part 12 of the eleventh electrical connection structure 2011 by soldering.

Fig. 20 is a schematic diagram of series connection of cells of a photovoltaic module according to a tenth embodiment of the present invention. Fig. 21 is a cross-sectional view taken along C-C of fig. 20.

Referring to fig. 20 to 21, the photovoltaic module includes a twelfth electrical connection structure 2012 and a fifteenth cell string 3015 and a sixteenth cell string 3016 connected in series by the twelfth electrical connection structure 2012. The fifteenth cell string 3015 is a shingled cell string and includes a fifteenth cell sheet 1015 at an end, and the sixteenth cell string 3016 is a shingled cell string and includes a sixteenth cell sheet 1016 at an end.

The twelfth electrical connection structure 2012 employs the electrical connection structure provided by the third embodiment of the present invention described above with reference to fig. 5 and 6 or the electrical connection structure provided by the fourth embodiment of the present invention described above with reference to fig. 7. In this embodiment, the twelfth electrical connection structure 2012 is the electrical connection structure provided by the third embodiment of the present invention described above with reference to fig. 5 and 6, and the specific structure thereof will not be described repeatedly.

The fifteenth cell 1015 is electrically connected to the first current collecting portion 111 of the twelfth electrical connection structure 2012, the sixteenth cell 1016 is electrically connected to the second current collecting portion 112 of the twelfth electrical connection structure 2012, and the morning electrode polarity at the electrical connection position of the fifteenth cell 1015 and the first current collecting portion 111 of the twelfth electrical connection structure 2012 is opposite to the electrode polarity at the electrical connection position of the sixteenth cell 1016 and the second current collecting portion 112 of the twelfth electrical connection structure 2012.

Specifically, the back surface of the fifteenth cell 1015 is electrically connected to the front surface of the first current collector 111 of the twelfth electrical connection structure 2012 through the conductive material 40, and the front surface of the sixteenth cell 1016 is electrically connected to the back surface of the second current collector 112 of the twelfth electrical connection structure 2012 through the conductive material 40.

According to the photovoltaic module provided by the embodiment, the welding spots are reduced, the preparation process of the photovoltaic module is simplified, and the yield of the photovoltaic module is improved.

Fig. 22 is a flow chart of a method of making the photovoltaic module shown in fig. 20. Referring to fig. 21, the method of manufacturing a photovoltaic module includes:

s601: a fifteenth cell 1015 and a sixteenth cell 1016 are provided, and in this embodiment, a fifteenth cell string 3015 and a sixteenth cell string 3016 are provided, wherein the fifteenth cell string 3015 is a shingled cell string and includes the fifteenth cell 1015 at an end portion, and the sixteenth cell string 3016 is a shingled cell string and includes the sixteenth cell 1016 at an end portion.

S602: preparing the twelfth electrical connection structure 2012, the twelfth electrical connection structure 2012 may adopt the electrical connection structure provided by the third embodiment of the present invention described above with reference to fig. 5 and 6 or the electrical connection structure provided by the fourth embodiment of the present invention described above with reference to fig. 7. In this embodiment, the twelfth electrical connection structure 2012 is the electrical connection structure provided by the third embodiment of the present invention described above with reference to fig. 5 and 6, and the specific structure thereof will not be described repeatedly.

S603: and electrically connecting the fifteenth cell 1015 with the first current collecting portion 111 of the twelfth electrical connection structure 2012, and electrically connecting the sixteenth cell 1016 with the second current collecting portion 112 of the twelfth electrical connection structure 2012, wherein the electrode polarity at the electrical connection position of the fifteenth cell 1015 with the first current collecting portion 111 of the twelfth electrical connection structure 2012 is opposite to the electrode polarity at the electrical connection position of the sixteenth cell 1016 with the second current collecting portion 112 of the twelfth electrical connection structure 2012.

Specifically, the back surface of the fifteenth cell 1015 is electrically connected to the front surface of the first current collector 111 of the twelfth electrical connection structure 2012 through the conductive material 40, and the front surface of the sixteenth cell 1016 is electrically connected to the back surface of the second current collector 112 of the twelfth electrical connection structure 2012 through the conductive material 40.

Fig. 22 is a schematic diagram of series-parallel connection of cells of a photovoltaic module according to an eleventh embodiment of the invention.

Referring to fig. 22, the photovoltaic module includes thirteenth and fourteenth electrical connection structures 2013 and 2014 and seventeenth, eighteenth, nineteenth and twentieth cell strings 3017, 3018, 3019 and 3020 connected in series and parallel through the thirteenth and fourteenth electrical connection structures 2013 and 2014, wherein the seventeenth cell string 3017 is a shingled cell string and includes a seventeenth cell tab 1017 at an end, the eighteenth cell string 3018 is a shingled cell string and includes an eighteenth cell tab 1018 at an end, the nineteenth cell string 3019 is a shingled cell string and includes a nineteenth cell tab 1019 at an end, and the twentieth cell string 3020 is a shingled cell string and includes a twentieth cell tab 1020 at an end.

The thirteenth electrical connection structure 2013 and the fourteenth electrical connection structure 2014 may employ the electrical connection structure provided by the first embodiment of the present invention described above with reference to fig. 3 or the electrical connection structure provided by the second embodiment of the present invention described above with reference to fig. 4. In the present embodiment, the thirteenth electrical connection structure 2013 and the fourteenth electrical connection structure 2014 are the electrical connection structures provided in the first embodiment of the present invention described above with reference to fig. 3, and specific structures thereof are not described repeatedly.

The seventeenth cell 1017 is electrically connected to the first current collecting portion 111 of the thirteenth electrical connection structure 2013, the eighteenth cell 1018 is electrically connected to the second current collecting portion 112 of the thirteenth electrical connection structure 2013, and the polarity of the electrode at the electrical connection position of the seventeenth cell 1017 to the first current collecting portion 111 of the thirteenth electrical connection structure 2013 is opposite to the polarity of the electrode at the electrical connection position of the eighteenth cell 1018 to the second current collecting portion 112 of the thirteenth electrical connection structure 2013, so that the seventeenth cell 3017 and the eighteenth cell 3018 are connected in series to each other to form a new cell string_e。

The nineteenth cell tab 1019 is electrically connected to the first current collecting portion 111 of the fourteenth electrical connection structure 2014, the twentieth cell tab 1020 is electrically connected to the second current collecting portion 112 of the fourteenth electrical connection structure 2014, the electrode polarity at the electrical connection position of the nineteenth cell tab 1019 and the first current collecting portion 111 of the fourteenth electrical connection structure 2014, and the twentieth cell tab 1020 and the fourteenth electrical connection structureThe electrodes at the electrical connection of the second current collector 112 of the structure 2014 are of opposite polarity such that the nineteenth 3019 and twentieth 3020 battery strings are connected in series with each other to form a new battery string_e。

The bus bar part 12 of the thirteenth electrical connection structure 2013 is electrically connected with the bus bar part 12 of the fourteenth electrical connection structure 2014, so that the battery string_eAnd the battery string f in parallel.

Specifically, the back surface of the seventeenth cell 1017 is electrically connected to the front surface of the first current collecting portion 111 of the thirteenth electrical connection structure 2013 through the conductive material 40, the front surface of the eighteenth cell 1018 is electrically connected to the back surface of the second current collecting portion 112 of the thirteenth electrical connection structure 2013, the back surface of the nineteenth cell 1019 is electrically connected to the front surface of the first current collecting portion 111 of the fourteenth electrical connection structure 2014, the front surface of the twentieth cell 1020 is electrically connected to the back surface of the second current collecting portion 112 of the fourteenth electrical connection structure 2014, and the bus bar portion 12 of the thirteenth electrical connection structure 2013 is electrically connected to the bus bar portion 12 of the fourteenth electrical connection structure 2014 by soldering.

The sum of the lengths of the bus bar portion 12 of the thirteenth electrical connection structure 2013 and the bus bar portion 12 of the fourteenth electrical connection structure 2014 is greater than the sum of the lengths of the first current collecting portion 111 of the thirteenth electrical connection structure 2013 and the first current collecting portion 111 of the fourteenth electrical connection structure 2014 or greater than the sum of the lengths of the second current collecting portion 112 of the thirteenth electrical connection structure 2013 and the second current collecting portion 112 of the fourteenth electrical connection structure 2014.

For example, the length of the bus bar part 12 of the thirteenth electrical connection structure 2013 may be greater than the length of the first current collecting part 111 or the second current collecting part 112 of the thirteenth electrical connection structure 2013, and the length of the bus bar part 12 of the fourteenth electrical connection structure 2014 may be less than or equal to the length of the first current collecting part 111 or the second current collecting part 112 of the fourteenth electrical connection structure 2014, so that the bus bar part 12 of the thirteenth electrical connection structure 2013 may be lapped on the bus bar part 12 of the fourteenth electrical connection structure 2014 to form an overlapping portion, and then electrical connection is achieved by soldering. However, the present invention is not limited thereto, and for example, the length of the bus bar part 12 of the thirteenth electrical connection structure 2013 may be less than or equal to the length of the first current collecting part 111 or the second current collecting part 112 of the thirteenth electrical connection structure 2013, and the length of the bus bar part 12 of the fourteenth electrical connection structure 2024 may be greater than the length of the first current collecting part 111 or the second current collecting part 112 of the fourteenth electrical connection structure 2024, as long as the bus bar parts of two electrical connection structures adjacent in parallel may overlap each other and then be electrically connected by soldering.

After the seventeenth battery string 3017, the eighteenth battery string 3018, the nineteenth battery string 3019, and the twentieth battery string 3020 are connected in series and parallel in the above-described manner, edges of the seventeenth battery string 3017, the eighteenth battery string 3018, the nineteenth battery string 3019, and the twentieth battery string 3020 also need to be connected in parallel with each other. Specifically, the edge cell tabs 200 of the seventeenth battery string 3017 and the edge cell tabs 200 of the nineteenth battery string 3019 are connected in parallel to each other through two edge electrical connection structures 100. The edge cell tab 200 of the eighteenth cell string 3018 and the edge cell tab 200 of the twentieth cell string 3020 are connected in parallel to each other through the two edge electrical connection structures 100. The parallel connection mode of the edge cells 200 can be the parallel connection mode of the photovoltaic module provided by the fifth embodiment of the invention in the above fig. 8 or the parallel connection mode of the edge cells of the photovoltaic module provided by the seventh embodiment of the invention in the above fig. 13, and the description is not repeated here.

The edge electrical connection structure may employ any one of the electrical connection structure provided in the first embodiment of the present invention with reference to fig. 3, the electrical connection structure provided in the second embodiment of the present invention with reference to fig. 4, the electrical connection structure provided in the third embodiment of the present invention with reference to fig. 5, and the electrical connection structure provided in the fourth embodiment of the present invention with reference to fig. 7. In this embodiment, the edge electrical connection structure 100 may adopt the electrical connection structure provided above with reference to fig. 4 according to the second embodiment of the present invention.

The above illustrates an example in which the photovoltaic module includes four cell strings. The present invention is not limited thereto and the photovoltaic module may further include more than four cell strings, and the more than four cell strings may be connected in series and/or in parallel in the manner described with reference to the present embodiment.

Comparing fig. 2 and 22, the end of the photovoltaic module is reduced from four welding points to one welding point, and the middle position is reduced from eight welding points to one welding point. Therefore, the photovoltaic module provided by the embodiment of the invention can reduce welding spots, thereby reducing the possibility of hidden cracks and splinters and improving the production efficiency and the production quality.

Fig. 23 is a flow chart of a method of making the photovoltaic module shown in fig. 22. Referring to fig. 22, the method of manufacturing a photovoltaic module includes:

s701: a seventeenth cell tab 1017, an eighteenth cell tab 1018, a nineteenth cell tab 1019 and a twentieth cell tab 1020 are provided, in this embodiment, a seventeenth cell string 3017, an eighteenth cell string 3018, a nineteenth cell string 3019 and a twentieth cell string 3020 are provided, the seventeenth cell string 3017 is a shingled cell string and includes the seventeenth cell tab 1017 at an end, the eighteenth cell string 3018 is a shingled cell string and includes the eighteenth cell tab 1018 at an end, the nineteenth cell string 3019 is a shingled cell string and includes the nineteenth cell tab 1019 at an end, and the twentieth cell string 3020 is a shingled cell string and includes the twentieth cell tab 1020 at an end.

S702: the thirteenth electrical connection structure 2013 and the fourteenth electrical connection structure 2014 may be prepared using the electrical connection structure provided in the first embodiment of the present invention described above with reference to fig. 3 or the electrical connection structure provided in the second embodiment of the present invention described above with reference to fig. 4. In the present embodiment, the thirteenth electrical connection structure 2013 and the fourteenth electrical connection structure 2014 are the electrical connection structures provided in the first embodiment of the present invention described above with reference to fig. 3, and specific structures thereof are not described repeatedly.

S703: electrically connecting the seventeenth cell 1017 with the first current collector 111 of the thirteenth electrical connection structure 2013, and electrically connecting the eighteenth cell 1018 with the second current collector 112 of the thirteenth electrical connection structure 2013, wherein the polarity of the electrode at the electrical connection of the seventeenth cell 1017 with the first current collector 111 of the thirteenth electrical connection structure 2013 is opposite to the polarity of the electrode at the electrical connection of the eighteenth cell 1018 with the second current collector 112 of the thirteenth electrical connection structure 2013, such that the seventeenth cell 3017 and the eighteenth cell 3018 are connected in series with each other to form a new cell string_e。

S704: the nineteenth cell sheet 1019 is electrically connected with the first current collecting part 111 of the fourteenth electrical connection structure 2014And electrically connecting the twentieth cell tab 1020 with the second current collecting part 112 of the fourteenth electrical connection structure 2014, wherein the polarity of the electrode at the electrical connection between the nineteenth cell tab 1019 and the first current collecting part 111 of the fourteenth electrical connection structure 2014 is opposite to the polarity of the electrode at the electrical connection between the twentieth cell tab 1020 and the second current collecting part 112 of the fourteenth electrical connection structure 2014, so that the nineteenth cell string 3019 and the twentieth cell string 3020 are connected in series with each other to form a new cell string_e。

S705: the bus bar part 12 of the thirteenth electrical connection structure 2013 is electrically connected with the bus bar part 12 of the fourteenth electrical connection structure 2014, so that the battery string_eAnd the battery string f in parallel.

Specifically, the back surface of the seventeenth cell 1017 is electrically connected to the front surface of the first current collecting portion 111 of the thirteenth electrical connection structure 2013 through the conductive material 40, the front surface of the eighteenth cell 1018 is electrically connected to the back surface of the second current collecting portion 112 of the thirteenth electrical connection structure 2013, the back surface of the nineteenth cell 1019 is electrically connected to the front surface of the first current collecting portion 111 of the fourteenth electrical connection structure 2014, the front surface of the twentieth cell 1020 is electrically connected to the back surface of the second current collecting portion 112 of the fourteenth electrical connection structure 2014, and the bus bar portion 12 of the thirteenth electrical connection structure 2013 is electrically connected to the bus bar portion 12 of the fourteenth electrical connection structure 2014 by soldering.

The sum of the lengths of the bus bar portion 12 of the thirteenth electrical connection structure 2013 and the bus bar portion 12 of the fourteenth electrical connection structure 2014 is greater than the sum of the lengths of the first current collecting portion 111 of the thirteenth electrical connection structure 2013 and the first current collecting portion 111 of the fourteenth electrical connection structure 2014 or greater than the sum of the lengths of the second current collecting portion 112 of the thirteenth electrical connection structure 2013 and the second current collecting portion 112 of the fourteenth electrical connection structure 2014.

For example, the length of the bus bar part 12 of the thirteenth electrical connection structure 2013 may be greater than the length of the first current collecting part 111 or the second current collecting part 112 of the thirteenth electrical connection structure 2013, and the length of the bus bar part 12 of the fourteenth electrical connection structure 2014 may be less than or equal to the length of the first current collecting part 111 or the second current collecting part 112 of the fourteenth electrical connection structure 2014, so that the bus bar part 12 of the thirteenth electrical connection structure 2013 may be lapped on the bus bar part 12 of the fourteenth electrical connection structure 2014 to form an overlapping portion, and then electrical connection is achieved by soldering. However, the present invention is not limited thereto, for example, the length of the bus bar part 12 of the thirteenth electrical connection structure 2013 may be less than or equal to the length of the first current collecting part 111 or the second current collecting part 112 of the thirteenth electrical connection structure 2013, and the length of the bus bar part 12 of the fourteenth electrical connection structure 2014 may be greater than the length of the first current collecting part 111 or the second current collecting part 112 of the fourteenth electrical connection structure 2014, as long as the bus bars of two electrical connection structures adjacent in parallel may overlap each other and then be electrically connected by soldering.

After the seventeenth battery string 3017, the eighteenth battery string 3018, the nineteenth battery string 3019, and the twentieth battery string 3020 are connected in series and parallel in the above-described manner, edges of the seventeenth battery string 3017, the eighteenth battery string 3018, the nineteenth battery string 3019, and the twentieth battery string 3020 also need to be connected in parallel with each other. Specifically, the edge cell tabs 200 of the seventeenth battery string 3017 and the edge cell tabs 200 of the nineteenth battery string 3019 are connected in parallel to each other through two edge electrical connection structures 100. The edge cell tab 200 of the eighteenth cell string 3018 and the edge cell tab 200 of the twentieth cell string 3020 are connected in parallel to each other through the two edge electrical connection structures 100. The parallel connection mode of the edge cells 200 can be the parallel connection mode of the photovoltaic module provided by the fifth embodiment of the invention in the above fig. 8 or the parallel connection mode of the edge cells of the photovoltaic module provided by the seventh embodiment of the invention in the above fig. 13, and the description is not repeated here.

The edge electrical connection structure may employ any one of the electrical connection structure provided in the first embodiment of the present invention with reference to fig. 3, the electrical connection structure provided in the second embodiment of the present invention with reference to fig. 4, the electrical connection structure provided in the third embodiment of the present invention with reference to fig. 5, and the electrical connection structure provided in the fourth embodiment of the present invention with reference to fig. 7. In this embodiment, the edge electrical connection structure 100 may adopt the electrical connection structure provided above with reference to fig. 4 according to the second embodiment of the present invention.

The conductive material in all the above embodiments may be conductive adhesive, conductive tape, or solder paste.

The electrical connection structure provided according to various embodiments of the present invention is formed as a metal strip that is entirely or partially coated with solder to facilitate electrical connection by soldering.

The surface of the electrical connection structure provided according to various embodiments of the present invention may be provided with a patterned colored coating, such as a black coating, to reduce reflections.

Technical solution 1, an electrical connection structure,

the electrical connection structure includes one current collecting part 11, a bus bar part 12, and a connection part 13 connecting the current collecting part 11 and the bus bar part 12,

wherein the collecting portion 11, the bus portion 12 and the connecting portion 13 are integrally formed,

the length of the bus bar portion 12 is greater than the length of the current collecting portion 11.

Technical solution 2, an electrical connection structure,

the electrical connection structure includes a first current collecting part 111, a second current collecting part 112, a bus bar part 12, and a connection part 13 connecting the first current collecting part (111) and the second current collecting part 112 to the bus bar part 12,

wherein the first collecting part 111, the second collecting part 112, the bus bar part 12 and the connecting part 13 are integrally formed,

the first current collecting portion 111 and the second current collecting portion 112 are located on the same side of the bus bar portion 12, and the first current collecting portion 111 is close to the bus bar portion 12 with respect to the second current collecting portion 112, and the second current collecting portion 112 is far from the bus bar portion 12 with respect to the first current collecting portion 111.

Claim 3, according to the electrical connection structure of claim 2,

the connection portion 13 includes a first connection portion 131 connecting the first current collecting portion 111 and the bus bar portion 12 and a second connection portion 132 connecting the second current collecting portion 112 and the first current collecting portion 111.

Claim 4, according to the electrical connection structure described in claim 3,

the second connection portion 132 extends from an end portion of the first connection portion 131 connected to the first current collecting portion 111 to the second current collecting portion 112.

Claim 5, according to the electrical connection structure of claim 4,

the first collecting portion 111 is in the same plane as the bus bar portion 12,

the first collecting portion 111 and the second collecting portion 112 are in different planes.

Claim 6, according to the electrical connection structure of claim 2,

the connection portion 13 includes a third connection portion 133 connecting the first current collecting portion 111 and the bus bar portion 12 and a fourth connection portion 134 connecting the second current collecting portion 112 and the bus bar portion 12.

Claim 7, according to the electrical connection structure described in claim 6,

the first collecting part 111, the second collecting part 112 and the bus bar part 12 are on the same plane,

the first collecting portion 111 is formed with a penetration portion 14 through which the fourth connection portion 134 passes.

Technical solution 8, a photovoltaic module includes a first electrical connection structure 2001 and a second electrical connection structure 2002, and a first cell 1001 and a second cell 1002 connected in parallel by the first electrical connection structure 2001 and the second electrical connection structure 2002,

wherein each of the first and second electrical connection structures 2001 and 2002 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, the current collecting portion 11, the bus bar portion 12, and the connection portion 13 being integrally formed,

wherein the first cell sheet 1001 is electrically connected to the current collecting portion 11 of the first electrical connection structure 2001, the second cell sheet 1002 is electrically connected to the current collecting portion 11 of the second electrical connection structure 2002, and the bus portion 12 of the first electrical connection structure 2001 is electrically connected to the bus portion 12 of the second electrical connection structure 2002.

Claim 9, the photovoltaic module according to claim 8,

the first cell tab 1001 is electrically connected to the current collecting part 11 of the first electrical connection structure 2001 by a conductive material,

the second cell sheet 1002 is electrically connected to the current collecting part 11 of the second electrical connection structure 2002 by a conductive material,

the bus bar portion 12 of the first electrical connection structure 2001 is electrically connected to the bus bar portion 12 of the second electrical connection structure 2002 by soldering.

Claim 10, the photovoltaic module according to claim 8,

the sum of the lengths of the bus bar portion 12 of the first electrical connection structure 2001 and the bus bar portion 12 of the second electrical connection structure 2002 is greater than the sum of the lengths of the current collecting portion 11 of the first electrical connection structure 2001 and the current collecting portion 11 of the second electrical connection structure 2002.

Technical solution 11, a method for manufacturing a photovoltaic module, comprising:

providing a first cell sheet 1001 and a second cell sheet 1002;

preparing a first electrical connection structure 2001 and a second electrical connection structure 2002, wherein each of the first electrical connection structure 2001 and the second electrical connection structure 2002 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, and the current collecting portion 11, the bus bar portion 12, and the connection portion 13 are integrally molded;

electrically connecting the first battery tab 1001 to the current collecting portion 11 of the first electrical connection structure 2001, and electrically connecting the second battery tab 1002 to the current collecting portion 11 of the second electrical connection structure 2002;

electrically connecting the bus bar portion 12 of the first electrical connection structure 2001 to the bus bar portion 12 of the second electrical connection structure 2002.

Technical solution 12, a photovoltaic module comprising a third electrical connection structure 2003 and a fourth electrical connection structure 2004 and a third cell 1003 and a fourth cell 1004 connected in series via the third electrical connection structure 2003 and the fourth electrical connection structure 2004,

wherein each of the third and fourth electrical connection structures 2003 and 2004 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, the current collecting portion 11, the bus bar portion 12, and the connection portion 13 being integrally formed,

wherein the third cell 1003 is electrically connected to the current collecting portion 11 of the third electrical connection structure 2003, the fourth cell 1004 is electrically connected to the current collecting portion 11 of the fourth electrical connection structure 2004, the polarity of the electrode at the connection of the third cell 1003 with the current collecting portion 11 of the third electrical connection structure 2003 is opposite to the polarity of the electrode at the connection of the fourth cell 1004 with the current collecting portion 11 of the fourth electrical connection structure 2004, and the bus bar 12 of the fourth electrical connection structure 2004 is electrically connected to the connection portion 13 of the third electrical connection structure 2003.

Claim 13, the photovoltaic module according to claim 12,

the third cell 1003 is electrically connected to the current collecting part 11 of the third electrical connection structure 2003 through a conductive material,

the fourth cell piece 1004 is electrically connected to the current collecting part 11 of the fourth electrical connection structure 2004 through a conductive material,

the bus bar portion 12 of the fourth electrical connection structure 2004 is electrically connected to the connection portion 13 of the third electrical connection structure 2003 by soldering and/or a conductive material.

Technical solution 14, a method for manufacturing a photovoltaic module, comprising:

providing a third battery slice 1003 and a fourth battery slice 1004;

preparing a third electrical connection structure 2003 and a fourth electrical connection structure 2004, wherein each of the third electrical connection structure 2003 and the fourth electrical connection structure 2004 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, the current collecting portion 11, the bus bar portion 12, and the connection portion 13 being integrally molded;

electrically connecting the third cell 1003 to the current collector 11 of the third electrical connection structure 2003, electrically connecting the fourth cell 1004 to the current collector 11 of the fourth electrical connection structure 2004, wherein the polarity of the electrode at the connection of the third cell 1003 to the current collector 11 of the third electrical connection structure 2003 is opposite to the polarity of the electrode at the connection of the fourth cell 1004 to the current collector 11 of the fourth electrical connection structure 2004, and electrically connecting the bus bar 12 of the fourth electrical connection structure 2004 to the connection portion 12 of the third electrical connection structure 2003.

Technical solution 15, a photovoltaic module includes a fifth electrical connection structure 2005, a sixth electrical connection structure 2006, a seventh electrical connection structure 2007 and an eighth electrical connection structure 2008, and a fifth cell 1005, a sixth cell 1006, a seventh cell 1007 and an eighth cell 1008 connected in series and in parallel through the fifth electrical connection structure 2005, the sixth electrical connection structure 2006, the seventh electrical connection structure 2007 and the eighth electrical connection structure 2008,

wherein each of the fifth, sixth, seventh and eighth electrical connection structures 2005, 2006, 2007 and 2008 includes one current collecting portion 11, a bus bar portion 12 and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, the current collecting portion 11, the bus bar portion 12 and the connection portion 13 are integrally molded,

wherein the fifth cell piece 1005 is electrically connected to the current collecting portion 11 of the fifth electrical connection structure 2005, the sixth cell piece 1006 is electrically connected to the current collecting portion 11 of the sixth electrical connection structure 2006, the electrode polarity at the connection of the fifth cell piece 1005 and the current collecting portion 11 of the fifth electrical connection structure 2005 is opposite to the electrode polarity at the connection of the sixth cell piece 1006 and the current collecting portion 11 of the sixth electrical connection structure 2006, and the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the connection portion 13 of the fifth electrical connection structure 2005;

the seventh cell piece 1007 is electrically connected to the current collecting portion 11 of the seventh electrical connection structure 2007, the eighth cell piece 1008 is electrically connected to the current collecting portion 11 of the eighth electrical connection structure 2008, the polarity of the electrode at the connection of the seventh cell piece 1007 with the current collecting portion 11 of the seventh electrical connection structure 2007 is opposite to the polarity of the electrode at the connection of the eighth cell piece 1008 with the current collecting portion 11 of the eighth electrical connection structure 2008, and the bus bar 12 of the eighth electrical connection structure 2008 is electrically connected to the connection portion 13 of the seventh electrical connection structure 2007;

the bus bar portion 12 of the fifth electrical connection structure 2005 is electrically connected to the bus bar portion 12 of the seventh electrical connection structure 2007, and the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the bus bar portion 12 of the eighth electrical connection structure 2008.

Claim 16, the photovoltaic module according to claim 15,

the fifth battery tab 1005 is electrically connected to the current collecting part 11 of the fifth electrical connection structure 2005 by a conductive material,

the sixth cell piece 1006 is electrically connected to the current collecting part 11 of the sixth electrical connection structure 2006 through a conductive material,

the seventh cell 1007 is electrically connected to the current collecting part 11 of the seventh electrical connection structure 2007 through a conductive material,

the eighth cell tab 1008 is electrically connected to the current collecting part 11 of the eighth electrical connection structure 2008 by a conductive material,

the bus bar part 12 of the sixth electrical connection structure 2006 is electrically connected to the connection part 13 of the fifth electrical connection structure 2005 by soldering and/or a conductive material,

the bus bar part 12 of the eighth electrical connection structure 2008 is electrically connected to the connection part 13 of the seventh electrical connection structure 2007 by soldering and/or a conductive material,

the bus bar part 12 of the fifth electrical connection structure 2005 is electrically connected to the bus bar part 12 of the seventh electrical connection structure 2007 by soldering,

the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the bus bar portion 12 of the eighth electrical connection structure 2008 by soldering.

Claim 17, the photovoltaic module according to claim 15,

the sum of the lengths of the bus bar portion 12 of the fifth electrical connection structure 2005 and the bus bar portion 12 of the seventh electrical connection structure 2007 is greater than the sum of the lengths of the current collecting portion 11 of the fifth electrical connection structure 2005 and the current collecting portion 11 of the seventh electrical connection structure 2007;

the sum of the lengths of the bus bar portion 12 of the sixth electrical connection structure 2006 and the bus bar portion 12 of the eighth electrical connection structure 2008 is greater than the sum of the lengths of the current collecting portion 11 of the sixth electrical connection structure 2006 and the current collecting portion 11 of the eighth electrical connection structure 2008.

Technical solution 18, a method for manufacturing a photovoltaic module, comprising:

providing a fifth cell piece 1005, a sixth cell piece 1006, a seventh cell piece 1007, and an eighth cell piece 1008;

preparing a fifth electrical connection structure 2005, a sixth electrical connection structure 2006, a seventh electrical connection structure 2007 and an eighth electrical connection structure 2008, wherein each of the fifth electrical connection structure 2005, the sixth electrical connection structure 2006, the seventh electrical connection structure 2007 and the eighth electrical connection structure 2008 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, the current collecting portion 11, the bus bar portion 12, and the connection portion 13 being integrally molded;

electrically connecting the fifth cell tab 1005 to the current collector 11 of the fifth electrical connection structure 2005, electrically connecting the sixth cell tab 1006 to the current collector 11 of the sixth electrical connection structure 2006, wherein a polarity of an electrode at a connection of the fifth cell tab 1005 with the current collector 11 of the fifth electrical connection structure 2005 and a polarity of an electrode at a connection of the sixth cell tab 1006 with the current collector 11 of the sixth electrical connection structure 2006 are opposite, and electrically connecting the bus bar 12 of the sixth electrical connection structure 2006 to the connection portion 13 of the fifth electrical connection structure 2005;

electrically connecting the seventh cell tab 1007 to the current collector 11 of the seventh electrical connection structure 2007, electrically connecting the eighth cell tab 1008 to the current collector 11 of the eighth electrical connection structure 2008, wherein the polarity of the electrode at the connection of the seventh cell tab 1007 to the current collector 11 of the seventh electrical connection structure 2007 and the polarity of the electrode at the connection of the eighth cell tab 1008 to the current collector 11 of the eighth electrical connection structure 2008 are opposite, and electrically connecting the bus bar 12 of the eighth electrical connection structure 2008 to the connection portion 13 of the seventh electrical connection structure 2007;

the bus bar portion 12 of the fifth electrical connection structure 2005 is electrically connected to the bus bar portion 12 of the seventh electrical connection structure 2007, and the bus bar portion 12 of the sixth electrical connection structure 2006 is electrically connected to the bus bar portion 12 of the eighth electrical connection structure 2008.

Technical solution 19, a photovoltaic module, comprising a ninth electrical connection structure 2009, and a ninth cell piece 1009 and a tenth cell piece 1010 connected in series through the ninth electrical connection structure 2009,

wherein the ninth electrical connection structure 2009 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, the current collecting portion 11, the bus bar portion 12, and the connection portion 13 are integrally formed,

wherein the ninth cell sheet 1009 is electrically connected to a first face of the current collector 11 of the ninth electrical connection structure 2009, the tenth cell sheet 1010 is electrically connected to a second face of the current collector 11 of the ninth electrical connection structure 2009, which is opposite to the first face, and the electrode polarity at the connection of the ninth cell sheet 1009 and the first face of the current collector 11 of the ninth electrical connection structure 2009 is opposite to the electrode polarity at the connection of the tenth cell sheet 1010 and the second face of the current collector 11 of the ninth electrical connection structure 2009.

Claim 20, the photovoltaic module according to claim 19,

the ninth cell piece 1009 is electrically connected to the first surface of the current collecting part 11 of the ninth electrical connection structure 2009 through a conductive material,

the tenth cell piece 1010 is electrically connected to the second face of the current collecting portion 11 of the ninth electrical connection structure 2009 through a conductive material.

Technical solution 21, a method for manufacturing a photovoltaic module, comprising:

providing a ninth cell 1009 and a tenth cell 1010;

preparing a ninth electrical connection structure 2009, wherein the ninth electrical connection structure 2009 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, and the current collecting portion 11, the bus bar portion 12, and the connection portion 13 are integrally formed;

electrically connecting the ninth cell tab 1009 to the first side of the current collector 11 of the ninth electrical connection structure 2009, and electrically connecting the tenth cell tab 1010 to the second side of the current collector 11 of the ninth electrical connection structure 2009, which is opposite to the first side, wherein the polarity of the electrode at the connection of the ninth cell tab 1009 with the first side of the current collector 11 of the ninth electrical connection structure 2009 is opposite to the polarity of the electrode at the connection of the tenth cell tab 1010 with the second side of the current collector 11 of the ninth electrical connection structure 2009.

Technical solution 22, a photovoltaic module, comprising a tenth electrical connection structure 2010 and an eleventh electrical connection structure 2011, and an eleventh cell 1011, a twelfth cell 1012, a thirteenth cell 1013 and a fourteenth cell 1014 connected in series and parallel through the tenth electrical connection structure 2010 and the eleventh electrical connection structure 2011,

wherein each of the tenth electrical connection structure 2010 and the eleventh electrical connection structure 2011 includes one current collecting part 11, a bus bar part 12, and a connection part 13 connecting the current collecting part 11 and the bus bar part 12, the current collecting part 11, the bus bar part 12, and the connection part 13 are integrally formed,

wherein the eleventh cell tab 1011 is electrically connected to a first face of the current collecting part 11 of the tenth electrical connection structure 2010, the twelfth cell tab 1012 is electrically connected to a second face of the current collecting part 11 of the tenth electrical connection structure 2010 opposite to the first face, the electrode polarity at the connection of the eleventh cell tab 1011 and the first face of the current collecting part 11 of the tenth electrical connection structure 2010 is opposite to the electrode polarity at the connection of the twelfth cell tab 1012 and the second face of the current collecting part 11 of the tenth electrical connection structure 2010,

wherein, the thirteenth cell sheet 1013 is electrically connected to the first surface of the current collecting part 11 of the eleventh electrical connection structure 2011, the fourteenth cell sheet 1014 is electrically connected to the second surface of the current collecting part 11 of the eleventh electrical connection structure 2011, the electrode polarity at the connection position of the thirteenth cell sheet 1013 and the first surface of the current collecting part 11 of the eleventh electrical connection structure 2011 is opposite to the electrode polarity at the connection position of the fourteenth cell sheet 1014 and the second surface of the current collecting part 11 of the eleventh electrical connection structure 2011,

the bus part 12 of the tenth electrical connection structure 2010 is electrically connected to the bus part 12 of the eleventh electrical connection structure 2011.

Claim 23, the photovoltaic module according to claim 22,

the eleventh and twelfth battery sheets 1011 and 1012 are electrically connected to the first and second sides of the current collecting part 11 of the tenth electrical connection structure 2010 through a conductive material,

the thirteenth cell sheet 1013 and the fourteenth cell sheet 1014 are electrically connected to the first and second faces of the current collecting part 11 of the eleventh electrical connection structure 2011 by a conductive material,

the bus bar part 12 of the tenth electrical connection structure 2010 is electrically connected to the bus bar part 12 of the eleventh electrical connection structure 2011 by soldering.

Claim 24, the photovoltaic module according to claim 22,

the sum of the lengths of the bus bar part 12 of the tenth electrical connection structure 2010 and the bus bar part 12 of the eleventh electrical connection structure 2011 is greater than the sum of the lengths of the current collecting part 11 of the tenth electrical connection structure 2010 and the current collecting part 11 of the eleventh electrical connection structure 2011.

Technical solution 25, a method for manufacturing a photovoltaic module, comprising:

providing an eleventh cell 1011) a twelfth cell 1012, a thirteenth cell 1013, and a fourteenth cell 1014;

preparing a tenth electrical connection structure 2010 and an eleventh electrical connection structure 2011, wherein each of the tenth electrical connection structure 2010 and the eleventh electrical connection structure 2011 includes one current collecting portion 11, a bus bar portion 12, and a connection portion 13 connecting the current collecting portion 11 and the bus bar portion 12, and the current collecting portion 11, the bus bar portion 12, and the connection portion 13 are integrally molded;

electrically connecting the eleventh cell tab 1011 to a first face of the current collecting part 11 of the tenth electrical connection structure 2010, electrically connecting the twelfth cell tab 1012 to a second face of the current collecting part 11 of the tenth electrical connection structure 2010 opposite to the first face, wherein the electrode polarity at the connection of the eleventh cell tab 1011 to the first face of the current collecting part 11 of the tenth electrical connection structure 2010 is opposite to the electrode polarity at the connection of the twelfth cell tab 1012 to the second face of the current collecting part 11 of the tenth electrical connection structure 2010,

electrically connecting the thirteenth cell sheet 1013 to a first face of the current collecting part 11 of the eleventh electrical connection structure 2011, and electrically connecting the fourteenth cell sheet 1014 to a second face of the current collecting part 11 of the eleventh electrical connection structure 2011, which is opposite to the first face, wherein the electrode polarity at the connection of the thirteenth cell sheet 1013 with the first face of the current collecting part 11 of the eleventh electrical connection structure 2011 and the electrode polarity at the connection of the fourteenth cell sheet 1014 with the second face of the current collecting part 11 of the eleventh electrical connection structure 2011 are opposite,

the bus part 12 of the tenth electrical connection structure 2010 is electrically connected to the bus part 12 of the eleventh electrical connection structure 2011.

Technical solution 26, a photovoltaic module, includes a twelfth electrical connection structure 2012 and a fifteenth cell 1015 and a sixteenth cell 1016 connected in series through the twelfth electrical connection structure 2012,

wherein the twelfth electrical connection structure 2012 includes a first current collecting portion 111, a second current collecting portion 112, a current collecting portion 12, and a connecting portion 13 connecting the first current collecting portion 111 and the second current collecting portion 112 to the current collecting portion 12, the first current collecting portion 111, the second current collecting portion 112, the current collecting portion 12, and the connecting portion 13 are integrally formed, the first current collecting portion 111 and the second current collecting portion 112 are located on the same side of the current collecting portion 12, and with respect to the second current collecting portion 112, the first current collecting portion 111 is close to the current collecting portion 12, and with respect to the first current collecting portion 111, the second current collecting portion 112 is far from the current collecting portion 12,

wherein the fifteenth cell 1015 is electrically connected to the first current collecting portion 111 of the twelfth electrical connection structure 2012, the sixteenth cell 1016 is electrically connected to the second current collecting portion 112 of the twelfth electrical connection structure 2012, and the electrode polarity at the connection of the fifteenth cell 1015 and the first current collecting portion 111 of the twelfth electrical connection structure 2012 is opposite to the electrode polarity at the connection of the sixteenth cell 1016 and the second current collecting portion 112 of the twelfth electrical connection structure 2012.

Claim 27, the photovoltaic module according to claim 26,

the fifteenth cell 1015 is electrically connected to the first current collector 111 of the twelfth electrical connection structure 2012 through a conductive material, and the sixteenth cell 1016 is electrically connected to the second current collector 112 of the twelfth electrical connection structure 2012 through a conductive material.

Technical solution 28, a method for manufacturing a photovoltaic module, comprising:

providing a fifteenth cell 1015 and a sixteenth cell 1016;

preparing a twelfth electrical connection structure 2012, wherein the twelfth electrical connection structure 2012 includes a first current collecting portion 111, a second current collecting portion 112, a bus portion 12, and a connecting portion 13 connecting the first current collecting portion 111 and the second current collecting portion 112 to the bus portion 12, the first current collecting portion 111, the second current collecting portion 112, the bus portion 12, and the connecting portion 13 are integrally formed, the first current collecting portion 111 and the second current collecting portion 112 are located on the same side of the bus portion 12, and the first current collecting portion 111 is close to the bus portion 12 with respect to the second current collecting portion 112, and the second current collecting portion 112 is far from the bus portion 12 with respect to the first current collecting portion (111);

electrically connecting the fifteenth cell 1015 to the first current collecting portion 111 of the twelfth electrical connection structure 2012, and electrically connecting the sixteenth cell 1016 to the second current collecting portion 112 of the twelfth electrical connection structure 2012, wherein the electrode polarity at the connection of the fifteenth cell 1015 to the first current collecting portion 111 of the twelfth electrical connection structure 2012 is opposite to the electrode polarity at the connection of the sixteenth cell 1016 to the second current collecting portion 112 of the twelfth electrical connection structure 2012.

Technical solution 29, a photovoltaic module, comprising a thirteenth electrical connection structure 2013 and a fourteenth electrical connection structure 2014, and a seventeenth cell (1017), an eighteenth cell 1018, a nineteenth cell 1019 and a twentieth cell 1020 connected in series and in parallel through the thirteenth electrical connection structure 2013 and the fourteenth electrical connection structure 2014,

each of the thirteenth electrical connection structure 2013 and the fourteenth electrical connection structure 2014 includes a first current collecting portion 111, a second current collecting portion 112, a bus bar portion 12, and a connection portion 13 connecting the first current collecting portion 111 and the second current collecting portion 112 to the bus bar portion 12, the first current collecting portion 111, the second current collecting portion 112, the bus bar portion 12, and the connection portion 13 are integrally formed, the first current collecting portion 111 and the second current collecting portion 112 are located on the same side of the bus bar portion 12, and the first current collecting portion 111 is close to the bus bar portion 12 with respect to the second current collecting portion 112, and the second current collecting portion 112 is far from the bus bar portion 12 with respect to the first current collecting portion 111,

wherein the seventeenth cell 1017 is electrically connected to the first current collector 111 of the thirteenth electrical connection structure 2013, the eighteenth cell 1018 is electrically connected to the second current collector 112 of the thirteenth electrical connection structure 2013, the electrode polarity at the connection of the seventeenth cell 1017 with the first current collector 111 of the thirteenth electrical connection structure 2013 is opposite to the electrode polarity at the connection of the eighteenth cell 1018 with the second current collector 112 of the thirteenth electrical connection structure 2013,

wherein the nineteenth cell tab 1019 is electrically connected to the first current collecting portion 111 of the fourteenth electrical connection structure 2014, the twentieth cell tab 1020 is electrically connected to the second current collecting portion 112 of the fourteenth electrical connection structure 2014, the polarity of the electrode at the connection of the nineteenth cell tab 1019 with the first current collecting portion 111 of the fourteenth electrical connection structure 2014 is opposite to the polarity of the electrode at the connection of the twentieth cell tab 1020 with the second current collecting portion 112 of the fourteenth electrical connection structure 2014,

wherein the bus bar part 12 of the thirteenth electrical connection structure 2013 is electrically connected to the bus bar part 12 of the fourteenth electrical connection structure 2014.

Claim 30, the photovoltaic module according to claim 29,

the seventeenth battery sheet 1017 is electrically connected to the first current collector 111 of the thirteenth electrical connection structure 2013 through a conductive material, the eighteenth battery sheet 1018 is electrically connected to the second current collector 112 of the thirteenth electrical connection structure 2013 through a conductive material,

the nineteenth cell tab 1019 is electrically connected to the first current collecting part 111 of the fourteenth electrical connection structure 2014 through a conductive material, the twentieth cell tab 1020 is electrically connected to the second current collecting part 112 of the fourteenth electrical connection structure 2014 through a conductive material,

the bus bar portion 12 of the thirteenth electrical connection structure 2013 is electrically connected to the bus bar portion 12 of the fourteenth electrical connection structure 2014 by soldering.

Claim 31, the photovoltaic module according to claim 29,

the sum of the lengths of the bus bar portion 12 of the thirteenth electrical connection structure 2013 and the bus bar portion 12 of the fourteenth electrical connection structure 2014 is greater than the sum of the lengths of the first current collecting portion 111 of the thirteenth electrical connection structure 2013 and the first current collecting portion 111 of the fourteenth electrical connection structure 2014 and greater than the sum of the lengths of the second current collecting portion 112 of the thirteenth electrical connection structure 2013 and the second current collecting portion 112 of the fourteenth electrical connection structure 2014.

Technical solution 32, a method for manufacturing a photovoltaic module, comprising:

providing a seventeenth cell 1017, an eighteenth cell 1018, a nineteenth cell 1019, and a twentieth cell 1020;

preparing a thirteenth electrical connection structure 2013 and a fourteenth electrical connection structure 2014, wherein each of the thirteenth electrical connection structure 2013 and the fourteenth electrical connection structure 2014 includes a first current collecting portion 111, a second current collecting portion 112, a bus portion 12, and a connection portion 13 connecting the first current collecting portion 111 and the second current collecting portion 112 to the bus portion 12, the first current collecting portion 111, the second current collecting portion 112, the bus portion 12, and the connection portion 13 are integrally molded, the first current collecting portion 111 and the second current collecting portion 112 are located on the same side of the bus portion 12 with respect to the second current collecting portion 112, the first current collecting portion 111 is close to the bus portion 12, and the second current collecting portion 112 is far from the bus portion 12 with respect to the first current collecting portion 111;

electrically connecting the seventeenth cell 1017 to the first current collector 111 of the thirteenth electrical connection structure 2013 and electrically connecting the eighteenth cell 1018 to the second current collector 112 of the thirteenth electrical connection structure 2013, wherein the electrode polarity at the connection of the seventeenth cell 1017 to the first current collector 111 of the thirteenth electrical connection structure 2013 is opposite to the electrode polarity at the connection of the eighteenth cell 1018 to the second current collector 112 of the thirteenth electrical connection structure 2013;

electrically connecting the nineteenth cell tab 1019 to the first current collecting portion 111 of the fourteenth electrical connection structure 2014, and electrically connecting the twentieth cell tab 1020 to the second current collecting portion 112 of the fourteenth electrical connection structure 2014, wherein the polarity of the electrode at the connection of the nineteenth cell tab 1019 with the first current collecting portion 111 of the fourteenth electrical connection structure 2014 is opposite to the polarity of the electrode at the connection of the twentieth cell tab 1020 with the second current collecting portion 112 of the fourteenth electrical connection structure 2014;

electrically connecting the bus bar part 12 of the thirteenth electrical connection structure 2013 to the bus bar part 12 of the fourteenth electrical connection structure 2014.

Compared with the prior art, the photovoltaic module provided by the invention can realize the following beneficial effects:

1. according to the electric connection structure, the whole body is integrally formed, conventional bus bars are not needed among the battery pieces, 65% of the bus bars can be reduced on the whole, the battery pieces are overlapped through the bus portions, welding points in the serial connection and/or parallel connection process of the battery pieces are reduced, the probability of welding missing is avoided, and the welding yield is increased by 66%;

2. according to the electric connection structure, the whole body is integrally formed, welding points in the series connection and/or parallel connection process of the battery pieces are reduced, and fine burrs generated in the welding process are reduced, so that the risks of hidden cracks and splinters caused by welding are reduced, and the qualification rate and the production quality of the assembly are improved;

3. according to the electric connection structure, the whole body is integrally formed, welding points in the series connection and/or parallel connection process of the battery pieces are reduced, soldering flux is avoided, materials are reduced, the manufacturing time is reduced, typesetting is simplified, the working procedures are reduced, and the cost is reduced;

4. according to the photovoltaic module, the integrally formed electric connection structure is used, and the connection mode with the battery piece is combined, so that the lamination process of the module is simpler, the manufacturing time is reduced, the realization of automatic production is facilitated, and the production efficiency is increased.

5. According to the electrical connection structure of the present invention, the length of the bus bar portion is increased and the thickness of the current collecting portion is reduced, compared to the bus bar and the solder bar of the related art, so that the electrical connection structure is more easily folded from the front surface of the battery cell to the back surface of the battery cell.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.