阅读说明：本技术 一种太阳能电池组件及其制备方法 (Solar cell module and preparation method thereof ) 是由 李令先 陈道远 王樱 于 2021-06-18 设计创作，主要内容包括：本发明公开了一种太阳能电池组件及其制备方法。该组件包括：多个电池串,其中,电池串包括多个串联的电池片、设置于每相邻两个电池片之间的导电结构以及支撑传热块；电池串的每相邻两个电池片中,第一电池片的背面与第二电池片的正面之间存在重叠区域；导电结构的一部分或者全部位于重叠区域的部分区域,用于串联相邻两个电池片；支撑传热块的一部分或全部设置于重叠区域内未设置导电结构的区域,为电池片散热。该组件有效地保证太阳能电池组件的稳定性,防止隐裂损坏；提高组件的热传导效率,降低由于热斑效应导致的高温,防止电池板过热烧毁或隐裂损坏而过度消耗组件能量,进而提高组件的发电效率。(The invention discloses a solar cell module and a preparation method thereof. The assembly includes: the battery string comprises a plurality of battery pieces connected in series, a conductive structure arranged between every two adjacent battery pieces and a supporting heat transfer block; in every two adjacent battery pieces of the battery string, an overlapping area exists between the back surface of the first battery piece and the front surface of the second battery piece; a part or all of the conductive structure is positioned in a partial area of the overlapping area and is used for connecting two adjacent battery pieces in series; and a part or all of the supporting heat transfer blocks are arranged in the region without the conductive structure in the overlapping region to dissipate heat of the battery piece. The component effectively ensures the stability of the solar cell component and prevents hidden crack damage; the heat conduction efficiency of the assembly is improved, the high temperature caused by the hot spot effect is reduced, the energy of the assembly is prevented from being excessively consumed due to overheating burning or hidden cracking damage of the battery plate, and the power generation efficiency of the assembly is improved.)

1. A solar cell module, comprising: a plurality of battery strings (10), wherein,

the battery string (10) comprises a plurality of battery pieces (11) connected in series, a conductive structure (12) arranged between every two adjacent battery pieces (11) and a supporting heat transfer block (13);

in every two adjacent battery slices (11) of the battery string (10), an overlapping area exists between the back surface of the first battery slice and the front surface of the second battery slice;

a part or all of the conductive structure (12) is positioned in a partial area of the overlapping area and is used for connecting two adjacent battery slices (11) in series;

and a part or all of the supporting heat transfer block (13) is arranged in the region which is not provided with the conductive structure (12) in the overlapping region, so as to radiate heat of the battery piece (11).

2. Solar cell module according to claim 1, characterized in that for the case where a part of the supporting heat transfer block (13) is provided in the overlap region,

the rest part of the supporting heat transfer block (13) is positioned on the back surface of the first battery piece.

3. The solar cell module according to claim 1 or 2,

the battery string (10) is a stitch-welded battery string or a shingled battery string.

4. The solar cell module according to claim 3, characterized in that for the case where the cell string (10) is the stitch-bonded cell string,

the supporting heat transfer blocks (13) and the conductive structures (12) are arranged alternately.

5. Solar module according to claim 3, characterized in that, for the case where the cell string (10) is the shingled cell string,

the supporting heat transfer block (13) is arranged on at least one side of the conductive structure (12).

6. The solar cell module according to any one of claims 1-2 and 4-5,

the supporting heat transfer block (13) comprises: any one or more polymers of silicone, polyolefin, polyurethane, epoxy, and acrylic glue, and any one or more thermally conductive materials of metal, polymer matrix, graphite, and ceramic materials.

7. The solar cell module according to claim 1, wherein the support heat transfer block (13) includes support portions (131) and heat transfer portions (132), and the support portions (131) and the heat transfer portions (132) are alternately arranged in an overlapping direction of two adjacent cell pieces (11).

8. A method for manufacturing a solar cell module, comprising:

a1: providing a battery piece (11) with a plurality of supporting heat transfer blocks (13) on the surface;

a2: the battery plates (11) are connected in series through a conductive structure (12), an overlapping area exists between every two adjacent battery plates (11), a part or all of the conductive structure (12) is located in a partial area of the overlapping area, and a part or all of the supporting heat transfer block (13) is located in an area where the conductive structure (12) is not arranged in the overlapping area.

9. The manufacturing method according to claim 8, wherein the battery piece (11) is a full-sheet battery piece, and step a1 includes:

a11: determining a position on the battery piece where the supporting heat transfer block (13) is to be arranged;

a12: the supporting heat transfer blocks (13) are formed on the battery cells (11) according to the positions where the supporting heat transfer blocks (13) are to be arranged.

10. The method for preparing a battery cell as claimed in claim 8, wherein the battery cell is a sliced battery cell, and step a1 includes:

a11': providing a whole battery piece;

a12': determining the position of the support heat transfer block (13) to be arranged on the whole battery piece according to the position of the support heat transfer block (13) on the whole battery piece;

a13': forming the supporting heat transfer blocks (13) on the full cell sheets according to the position to be arranged;

a14': and cutting the whole battery piece formed with the supporting heat transfer blocks (13) to obtain a sliced battery piece with the supporting heat transfer blocks (13).

Technical Field

The invention relates to a solar cell module and a preparation method thereof.

Background

The solar cell module is generally formed by connecting a plurality of cell strings in series, parallel or a combination of series and parallel, and each cell string may be formed by overlapping and connecting a plurality of cells in series, such as a lap-welded cell string, a shingled cell string, etc. The cell sheets which are mutually overlapped and connected in series can be fixed through the conductive structure.

Due to the existence of the conductive structure, the overlapped areas of the cells cannot be completely attached to each other and are stressed unevenly, so that the edges of the cells are cracked or even split in the processes of lamination, transportation and the like, and further, the cracked parts generate a hot spot effect, so that the solar cell panel is burnt due to local overheating and sharp rise of temperature.

Disclosure of Invention

In view of the above, the technical problem to be solved by the present invention is to provide a solar cell module and a method for manufacturing the same, which can effectively ensure the stability of the solar cell module and prevent hidden crack damage; the heat conduction efficiency of the assembly is improved, the high temperature caused by the hot spot effect is reduced, the energy of the assembly is prevented from being excessively consumed due to overheating burning or hidden cracking damage of the battery plate, and the power generation efficiency of the assembly is improved.

In order to solve the technical problems, the invention provides the following technical scheme:

in a first aspect, the present invention provides a solar cell module comprising:

a plurality of battery strings, wherein,

the battery string comprises a plurality of battery pieces connected in series, a conductive structure arranged between every two adjacent battery pieces and a supporting heat transfer block;

in every two adjacent battery pieces of the battery string, an overlapping area exists between the back surface of the first battery piece and the front surface of the second battery piece;

a part or all of the conductive structure is positioned in the overlapping area and is used for connecting two adjacent battery pieces in series;

and a part or all of the supporting heat transfer blocks are arranged in the overlapping area and used for filling the area, which is not provided with the conductive structure, in the overlapping area and radiating heat for the battery piece.

In a second aspect, the present invention provides a method for manufacturing a solar cell module, including:

a1: providing a battery piece with a plurality of supporting heat transfer blocks on the surface;

a2: the battery pieces are connected in series through a conductive structure, an overlapping area exists between every two adjacent battery pieces, a part or all of the conductive structure is located in a partial area of the overlapping area, and a part or all of the supporting heat transfer block is located in an area, in which the conductive structure is arranged, in the overlapping area.

The technical scheme of the first aspect of the invention has the following advantages or beneficial effects: arranging a part or all of the conductive structure in the overlapping area of two adjacent battery pieces for serially connecting the battery pieces; a part or all of the supporting heat transfer blocks are arranged in the overlapping area of two adjacent battery pieces and used for filling the area without the conductive structure in the overlapping area and radiating the heat of the battery pieces, so that the stability of the solar battery assembly can be effectively ensured, and hidden crack damage can be prevented; the heat conduction efficiency of the assembly is improved, the high temperature caused by the hot spot effect is reduced, the energy of the assembly is prevented from being excessively consumed due to overheating burning or hidden cracking damage of the battery plate, and the power generation efficiency of the assembly is improved.

Drawings

FIG. 1 is a first schematic diagram of a solar module according to an embodiment of the present invention;

FIG. 2 is a second schematic diagram of a solar module according to an embodiment of the present invention;

FIG. 3 is a third schematic diagram of a solar module according to an embodiment of the invention;

FIG. 4 is a fourth schematic diagram of a solar module according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a circuit diagram of a solar module according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of another circuit diagram of a solar module according to an embodiment of the invention;

FIG. 7 is a first schematic diagram of a solar module according to another embodiment of the present invention;

FIG. 8 is a second schematic diagram of a solar module according to another embodiment of the present invention;

FIG. 9 is a third schematic diagram of a solar module according to another embodiment of the invention;

FIG. 10 is a fourth schematic diagram of a solar module according to another embodiment of the present invention;

FIG. 11 is a fifth schematic view of a solar module according to another embodiment of the present invention;

FIG. 12 is a fifth schematic view of a solar module according to an embodiment of the present invention;

FIG. 13 is a sixth schematic view of a solar module according to another embodiment of the present invention;

fig. 14 is a first schematic diagram of a method of fabricating a solar cell module according to an embodiment of the present invention;

FIG. 15 is a second schematic diagram of a method of fabricating a solar module according to one embodiment of the invention;

fig. 16 is a first schematic diagram of a method of fabricating a solar cell module according to another embodiment of the present invention;

FIG. 17 is a second schematic diagram of a method of fabricating a solar cell module according to another embodiment of the present invention;

the reference numbers are as follows:

10 battery cluster 11 battery piece 12 conducting structure

13 support heat transfer block 14 back plate 15 cover plate

16 front packaging layer/adhesive film

17 rear packaging layer/adhesive film

Detailed Description

As shown in fig. 1, fig. 1 is a schematic diagram of a cell string of a solar cell module according to an embodiment of the present invention, the solar cell module including a plurality of cell strings 10, wherein:

each battery string 10 includes a plurality of battery cells 11 connected in series, an electrically conductive structure 12 disposed between each adjacent two of the battery cells 11, and a supporting heat transfer block 13.

In every two adjacent battery pieces 11 of the battery string 10, an overlapping area exists between the back surface of the first battery piece and the front surface of the second battery piece; the light receiving surface of the cell is the front surface of the cell, and the backlight surface of the cell is the back surface of the cell. Any one of the battery pieces 11 in the battery string 10 can be used as a first battery piece, and the battery piece 11 adjacent to the first battery piece and having an overlapping region between the front surface and the back surface of the first battery piece is a second battery piece; correspondingly, any one of the battery pieces 11 in the battery string 10 can be used as a second battery piece, and the battery piece 11 adjacent to the second battery piece and having the back surface overlapping with the front surface of the second battery piece is the first battery piece.

A part or all of the conductive structure 12 is located in a partial area of the overlapping area for connecting two adjacent battery pieces 11 in series, and the conductive structure 12 may be a conductive adhesive tape or a metal solder strip. As shown in fig. 1 to 4, two adjacent battery pieces use solder strips as the conductive structures 12, and a part of the conductive structures 12 is located in a partial region of the overlapping region; as shown in fig. 7 to 11, two adjacent battery sheets have a conductive adhesive tape as a conductive structure, and the whole of the conductive structure 12 is located in a partial region of the overlapping region.

A part or all of the supporting heat transfer block 13 is arranged in the area without the conductive structure 12 in the overlapping area to support the area without the conductive structure in the overlapping area, so that incomplete attaching of the overlapping area caused by the existence of the conductive structure, hidden cracking even hot spot damage caused by uneven stress of the cell and excessive consumption of assembly energy due to hidden cracking even hot spot effect are prevented, and the stability and the power generation efficiency of the solar cell assembly are improved; accordingly, the supporting heat transfer blocks 13 can dissipate heat from the battery cells 11, thereby improving the heat conduction efficiency of the solar battery module, reducing the high temperature effect, and improving the power generation efficiency of the module.

In the embodiment of the present invention, the supporting heat transfer block 13 may fill all or only a part of the region in the overlapping region where the conductive structure 12 is not disposed.

In an embodiment of the invention, the supporting heat transfer block comprises one or more composite systems of polymers, high heat conductivity materials, additives and the like to realize a supporting function on the overlapping area; any one or more of a metal, a polymer matrix, graphite, and a ceramic material may also be included to provide heat dissipation. Wherein, the polymer system can be any one or more of organic silicon, polyolefin, polyurethane, epoxy resin and acrylic glue; the heat transfer coefficient of the supporting heat transfer block may be greater than 1W/(m.k); the supporting heat transfer block may be an electrical conductor or a non-electrical conductor. Exemplarily, the heat conduction coefficient of the supporting heat transfer block can be set according to actual needs, and in areas with sufficient sunlight, a heat conduction material with a high heat conduction coefficient is selected; in areas with less sun exposure, a thermally conductive material with a low thermal conductivity is selected. Whether the supporting heat transfer block is conductive or not can be set according to actual needs, and proper materials can be selected according to needs.

In the embodiment of the present invention, when the support heat transfer blocks 13 are provided, the support heat transfer blocks 13 may be provided on the rear surface of the battery cell 11. As shown in fig. 1, when a portion of the support heat transfer block 13 is disposed in a region where the conductive structure 12 is not disposed in the overlapping region, the remaining portion of the support heat transfer block 13 is located on the back surface of the first battery cell of the adjacent two battery cells 11. The supporting heat transfer blocks are arranged on the back of the cell, so that when one part of the supporting heat transfer blocks is arranged in the overlapping area, the shielding of the supporting heat transfer blocks on the light receiving area of the cell can be reduced, and the power generation efficiency of the solar cell module is improved.

In the embodiment of the present invention, as shown in fig. 1, 2, and 3, the battery string 10 is a stitch-welded battery string, the battery string 10 includes a plurality of conductive structures 12 and a plurality of supporting heat transfer blocks 13, the plurality of supporting heat transfer blocks 13 are alternately arranged with the plurality of conductive structures 12, and the conductive structures 12 are metal solder strips, that is, the plurality of supporting heat transfer blocks 13 are alternately arranged with the plurality of metal solder strips. The support heat transfer blocks and the metal welding strips are arranged alternately, so that the support heat transfer blocks can fill the regions, which are not provided with the metal welding strips, in the overlapping regions among the battery pieces, the regions, which are not provided with the metal welding strips, in the overlapping regions are supported, the phenomena of incomplete attachment of the overlapping regions, hidden cracking of the battery pieces and even hot spots of the battery pieces, which are caused by the existence of the metal welding strips, are prevented, and the stability and the power generation efficiency of the solar battery assembly are improved; furthermore, the supporting heat transfer block can dissipate heat of the battery piece, so that the heat conduction efficiency of the solar battery assembly is improved, the influence of high temperature on the battery piece is prevented, and the power generation efficiency of the assembly is improved.

In the embodiment of the present invention, as shown in fig. 1, 2 and 3, when the battery string 10 is a stitch-welded battery string, a part of the conductive structure 12, i.e., the metal welding strip, is located in a partial region of the overlapping region, and is used for connecting two adjacent battery plates 11 in series. Alternatively, the entire partial region of the metal solder strip in the overlap region may also be selectively provided, as long as the current-guiding effect of the conductive structure is achieved.

In the embodiment of the present invention, as shown in fig. 1, 2 and 4, the length of the support heat transfer block 13 in the current flowing direction of the conductive structure 12 is not less than the width of the overlapping region, and when the battery string 10 is a stitch-welded battery string, i.e., in the current flowing direction of the metal solder ribbon (the first direction shown in fig. 2), the length L of the support heat transfer block 13 is not less than the width W of the overlapping region. As shown in fig. 1, when the length L of the support heat transfer block 13 is greater than the width W of the overlapping region, a part of the support heat transfer block 13 is disposed in the region where no metal solder strip is disposed in the overlapping region to dissipate heat from the battery cell 11; as shown in fig. 4, when the length L of the support heat transfer block 13 is equal to the width W of the overlapping area, the entire support heat transfer block 13 is disposed in the area where no metal solder strip is disposed in the overlapping area, and dissipates heat to the battery cell 11. Under the normal condition, the length of the supporting heat transfer block is equal to the width of the overlapping area, so that the technical effects of supporting the area without the metal welding strip in the overlapping area and ensuring the complete bonding of adjacent battery pieces so as to improve the stability and the power generation efficiency of the solar battery assembly can be met; further, in order to obtain a better technical effect of assembly stability, the length of the supporting heat transfer block can be set to be larger than the width of the overlapping area, so that the area, which is not provided with the metal welding strip, in the overlapping area is ensured to be fully filled, the battery pieces are completely attached, and the power generation efficiency of the battery assembly is improved.

In the embodiment of the present invention, when the battery string is a stitch-welded battery string, a portion or all of the metal solder strip may be selectively disposed in a partial region of the overlapping region, while a portion or all of the support heat transfer block is disposed in a region of the overlapping region where no metal solder strip is disposed.

In the embodiment of the present invention, the conductive structures 12 and the supporting heat transfer blocks 13 have the same height in the overlapping direction of the battery cells 11 (the second direction as shown in fig. 4), i.e., the metal solder strips and the supporting heat transfer blocks 13 have the same height. Through setting up the conducting structure and supporting the highly the same of heat transfer block, set up the metal solder strip promptly and support the highly the same of heat transfer block, can ensure that the region that does not set up the metal solder strip in the overlap region is filled for the battery piece is laminated completely, prevents that incomplete laminating from leading to the battery piece to produce latent splitting or even hot spot phenomenon, thereby improves solar module's stability and generating efficiency.

In an embodiment of the present invention, further comprising: when the battery string 10 is a stitch-welding battery string, the conductive structure 12 is a metal welding strip, the front surface of each battery piece 11 is provided with a front main grid line, the back surface of each battery piece 11 is provided with a back main grid line, the front main grid line of the second battery piece in two adjacent battery pieces 11 is connected with the back main grid line of the first battery piece through the metal welding strip, and the metal welding strip collects current generated by the battery pieces 11; the metal welding strip can be a circular welding strip, a triangular welding strip, a flat welding strip or a special-shaped welding strip. The battery plates are connected in series through the metal welding strips to form a battery string, so that the connection stability of the battery plates can be ensured.

In the embodiment of the invention, when the cell string 10 is a stitch-bonded cell string, a six-in-three-string circuit diagram of the solar cell module is shown in fig. 5, and a five-in-two-string circuit diagram of the solar cell module is shown in fig. 6; wherein: each battery string 10 includes a plurality of battery cells 11 connected in series, a conductive structure 12 (i.e., a metal solder strip) disposed between each adjacent two battery cells 11, and supporting heat transfer blocks 13 arranged alternately with the metal solder strip.

In the embodiment of the present invention, as shown in fig. 7, 8, 9, 10, and 11, the battery string 10 is a shingled battery string, the battery string 10 includes a conductive structure 12 and a supporting heat transfer block 13, the supporting heat transfer block 13 is disposed on at least one side of the conductive structure 12, the conductive structure 12 is a conductive adhesive tape, that is, the supporting heat transfer block 13 is disposed on at least one side of the conductive adhesive tape; in fig. 8 to 11, the dotted boxes represent the overlapping regions of two adjacent battery pieces.

As shown in fig. 7 and 8, the conductive adhesive tape is disposed in the middle of the overlapping area, and correspondingly, two supporting heat transfer blocks 13 are respectively disposed on two sides of the conductive adhesive tape, the supporting heat transfer block far away from the edge of the back surface of the first battery piece is a first supporting heat transfer block, the supporting heat transfer block close to the edge of the back surface of the first battery piece is a second supporting heat transfer block, and the edge of the second supporting heat transfer block far away from the conductive adhesive tape is flush with the edge of the back surface of the first battery piece; or, as shown in fig. 9, the conductive adhesive tape is disposed at the edge of the back surface of the first battery piece, and one side edge of the conductive adhesive tape is flush with the edge of the back surface of the first battery piece, and accordingly, the supporting heat transfer block 13 is disposed at the other side of the conductive adhesive tape away from the edge of the back surface of the first battery piece. According to different arrangement positions of the conductive adhesive strips, the support heat transfer blocks are arranged on at least one side of the conductive adhesive strips, so that the support heat transfer blocks can fill the areas, which are not provided with the conductive adhesive strips, in the overlapping areas, the areas, which are not provided with the conductive adhesive strips, in the overlapping areas are supported, the phenomena of incomplete attaching of the overlapping areas, hidden cracking of the battery pieces and even hot spots caused by the existence of the conductive adhesive strips are prevented, and the stability and the power generation efficiency of the solar battery assembly are improved; furthermore, the supporting heat transfer block can dissipate heat of the battery piece, so that the heat conduction efficiency of the solar battery assembly is improved, the influence of high temperature on the battery piece is prevented, and the power generation efficiency of the assembly is improved.

In the embodiment of the present invention, as shown in fig. 8 and 9, when the battery string 10 is a shingled battery string, the whole conductive structure 12, i.e., the conductive adhesive tape, is located in a partial region of the overlapping region, and is used for connecting two adjacent battery sheets 11 in series. Alternatively, a partial region of the strip of conductive glue, which is located in the overlap region, may also be provided selectively, as long as the draining action of the conductive structure is achieved.

In the embodiment of the present invention, as shown in fig. 7, 8 and 9, the sum of the width of the conductive structure 12 and the width of the support heat transfer block 13 is not less than the width W of the overlapping region, and when the battery string 10 is a shingled battery string, that is, the sum of the width of the conductive adhesive tape and the width of the support heat transfer block 13 is not less than the width W of the overlapping region. When the sum of the width of the conductive adhesive tape and the width of the support heat transfer blocks 13 is greater than the width W of the overlapping area, as shown in fig. 8, two support heat transfer blocks 13 are respectively arranged at two sides of the conductive adhesive tape, a part of the first support heat transfer block is arranged in the area where the conductive adhesive tape is not arranged in the overlapping area, and the whole second support heat transfer block is arranged in the area where the conductive adhesive tape is not arranged in the overlapping area, so that the first support heat transfer block and the second support heat transfer block fill the area where the conductive adhesive tape is not arranged in the overlapping area and dissipate heat for the battery piece 11; as shown in fig. 9, the heat conductive adhesive tape is disposed on the edge of the back surface of the first battery piece, the support heat transfer block 13 is disposed on the other side of the heat conductive adhesive tape away from the edge of the back surface of the first battery piece, and a part of the support heat transfer block 13 is disposed in the overlapping region where the heat conductive adhesive tape is not disposed.

When the sum of the width of the conductive adhesive tape and the width of the support heat transfer blocks 13 is equal to the width W of the overlapping area, as shown in fig. 10, two support heat transfer blocks 13 are respectively arranged at two sides of the conductive adhesive tape, and all of the first support heat transfer blocks and all of the second support heat transfer blocks are arranged in the area where the conductive adhesive tape is not arranged in the overlapping area, so that the first support heat transfer blocks and the second support heat transfer blocks fill the area where the conductive adhesive tape is not arranged in the overlapping area and dissipate heat for the battery piece 11; as shown in fig. 11, the heat conductive adhesive tape is disposed on the edge of the back surface of the first battery piece, the support heat transfer block 13 is disposed on the other side of the heat conductive adhesive tape away from the edge of the back surface of the first battery piece, and all of the support heat transfer blocks 13 are disposed in the overlapping region where the heat conductive adhesive tape is not disposed.

Under the normal condition, the sum of the width of the conductive adhesive tape and the width of the supporting heat transfer block is equal to the width of the overlapping area, so that the technical effects of supporting the area without the conductive adhesive tape in the overlapping area and ensuring the complete bonding of adjacent cells so as to improve the stability and the power generation efficiency of the solar cell module can be met; further, in order to obtain a better technical effect of assembly stability, the sum of the width of the conductive adhesive tape and the width of the support heat transfer block can be set to be larger than the width of the overlapping area, so that the area, which is not provided with the conductive adhesive tape, in the overlapping area is fully filled, the battery pieces are completely attached, and the power generation efficiency of the battery assembly is improved.

In the embodiment of the present invention, when the battery string is a shingled battery string, a portion or all of the conductive adhesive tape may be selectively disposed in the overlapping region, while a portion or all of the support heat transfer block is disposed in the overlapping region.

In the embodiment of the present invention, the heights of the conductive structures 12 and the supporting heat transfer blocks 13 are the same, that is, the heights of the conductive adhesive tapes and the supporting heat transfer blocks 13 are the same, in the overlapping direction of the battery cells 11. Through setting up conductive structure and supporting the highly the same of heat transfer piece, set up conductive adhesive tape promptly and support the highly the same of heat transfer piece, can ensure that the region that does not set up conductive adhesive tape in the overlap region is filled for the battery piece is laminated completely, prevents that incomplete laminating from leading to the battery piece to produce latent crack or even hot spot phenomenon, thereby improves solar module's stability and generating efficiency.

In the embodiment of the present invention, when the battery string 10 is a shingled battery string, the length of the supporting heat transfer block 13 is the same as the length of the conductive structure 12, and the length of the conductive structure 12 is not less than the length of the overlapping area, that is, the length of the supporting heat transfer block 13 is the same as the length of the conductive adhesive tape, and the length of the conductive adhesive tape is not less than the length of the overlapping area. The length of supporting the heat transfer block is the same as that of the conductive structure, namely the length of supporting the heat transfer block is the same as that of the conductive adhesive tape, and the length of the supporting heat transfer block and the length of the conductive adhesive tape are not smaller than that of the overlapping area, so that the overlapping area can be fully filled with the supporting heat transfer block and the conductive adhesive tape, complete lamination of the cell is ensured, the phenomenon that the cell is hidden or even hot spots is generated due to incomplete lamination is prevented, and the stability and the power generation efficiency of the solar cell module are improved.

In an embodiment of the present invention, as shown in fig. 12, when the battery string 10 is a stitch-welded battery string, the support heat transfer block 13 may include support portions 131 and heat transfer portions 132, the support portions 131 and the heat transfer portions 132 being alternately arranged in an overlapping direction of two adjacent battery cells 11. The material of the supporting portion 131 may be any one or more polymers selected from silicone, polyolefin, polyurethane, epoxy resin, and acrylic glue, and the material of the heat transfer portion 132 may be any one or more heat conductive materials selected from metal, polymer base material, graphite, and ceramic material.

In an embodiment of the present invention, as shown in fig. 13, when the battery string 10 is a shingled battery string, the support heat transfer block 13 may include support portions 131 and heat transfer portions 132, the support portions 131 and the heat transfer portions 132 being alternately arranged in an overlapping direction of two adjacent battery cells 11. The material of the supporting portion 131 may be any one or more polymers selected from silicone, polyolefin, polyurethane, epoxy resin, and acrylic glue, and the material of the heat transfer portion 132 may be any one or more heat conductive materials selected from metal, polymer base material, graphite, and ceramic material.

In the embodiment of the present invention, the support heat transfer blocks 13 alternately arranged on the support portions 131 and the heat transfer portions 132 are used to directly and alternately print the support portions and the heat transfer portions on the whole cell without the step of mixing the support material and the heat transfer material to form the support heat transfer blocks, so that on one hand, the production process of the solar cell module can be simplified; on the other hand, the heat transfer material is directly exposed to the air, so that the heat conduction efficiency of the supporting heat transfer block can be further improved, and the stability and the power generation efficiency of the solar cell module are improved.

As shown in fig. 14 and fig. 15, an embodiment of the present invention provides a method for manufacturing a solar cell module, where a cell 11 of the solar cell module is a full cell, and the method for manufacturing the solar cell module may include the following steps:

step S1401: the position where the heat transfer block 13 is to be arranged on the battery cell 11 is determined.

Step S1402: the support heat transfer blocks 13 are formed on the battery cell 11 according to positions where the support heat transfer blocks 13 are to be arranged.

In the embodiment of the present invention, the supporting heat transfer blocks 13 may be formed on the battery cells 11 by screen printing or dispensing.

Step S1403: a plurality of battery pieces 11 are connected in series through the conductive structures 12, an overlapping area exists between every two adjacent battery pieces 11, a part or all of the conductive structures 12 are located in a part of the overlapping area, and a part or all of the support heat transfer blocks 13 are located in an area, where no conductive structure 12 is arranged, in the overlapping area.

When a plurality of battery pieces 11 are connected in series to form a stitch-welded battery string through the conductive structure, the conductive structure 12 is a metal solder strip, a part of the metal solder strip is located in a partial area of the overlapping area, and a part or all of the support heat transfer block 13 is located in an area where no metal solder strip is located in the overlapping area. When the plurality of battery pieces 11 are connected in series to form the shingled battery string through the conductive structure, the conductive structure 12 is a conductive adhesive tape, the whole conductive adhesive tape is located in a partial area of the overlapping area, and a part or the whole of the support heat transfer block 13 is located in an area where the conductive adhesive tape is not located in the overlapping area.

Step S1404: the photovoltaic back plate 50, the rear packaging adhesive film 40, the solar cell string 10, the front packaging adhesive film 30 and the cover plate glass 20 are sequentially placed.

Step S1405: and laminating the placed assemblies to obtain the solar cell assembly.

As shown in fig. 16 and 17, an embodiment of the present invention provides a method for manufacturing a solar cell module, where a cell 11 of the solar cell module is a sliced cell, and the method for manufacturing the solar cell module may include the following steps:

step S1601: and providing a whole battery piece.

Step S1602: the position of the support heat transfer block 13 to be arranged on the full cell is determined according to the position of the support heat transfer block 13 on the full cell.

Step S1603: the support heat transfer blocks 13 are formed on the entire battery cells according to the positions where the support heat transfer blocks 13 are to be arranged.

In the embodiment of the present invention, the supporting heat transfer blocks 13 may be formed on the entire battery cells by screen printing or dispensing.

Step S1604: the whole battery piece formed with the supporting heat transfer blocks 13 is cut to obtain a sliced battery piece having the supporting heat transfer blocks 13, i.e., a battery piece 11.

Step S1605: a plurality of battery pieces 11 are connected in series through the conductive structures 12, an overlapping area exists between every two adjacent battery pieces 11, a part or all of the conductive structures 12 are located in a part of the overlapping area, and a part or all of the support heat transfer blocks 13 are located in an area, where no conductive structure 12 is arranged, in the overlapping area.

When a plurality of battery pieces 11 are connected in series to form a stitch-welded battery string through the conductive structure, the conductive structure 12 is a metal solder strip, a part of the metal solder strip is located in a partial area of the overlapping area, and a part or all of the support heat transfer block 13 is located in an area where no metal solder strip is located in the overlapping area. When the plurality of battery pieces 11 are connected in series to form the shingled battery string through the conductive structure, the conductive structure 12 is a conductive adhesive tape, the whole conductive adhesive tape is located in a partial area of the overlapping area, and a part or the whole of the support heat transfer block 13 is located in an area where the conductive adhesive tape is not located in the overlapping area.

Step S1606: the photovoltaic back plate 50, the rear packaging adhesive film 40, the solar cell string 10, the front packaging adhesive film 30 and the cover plate glass 20 are sequentially placed.

Step S1607: and laminating the placed assemblies to obtain the solar cell assembly.

The embodiment of the invention provides the following technical scheme:

technical scheme 1, a solar module, its characterized in that includes: a plurality of battery strings 10, wherein,

the battery string 10 comprises a plurality of battery pieces 11 connected in series, a conductive structure 12 arranged between every two adjacent battery pieces 11 and a supporting heat transfer block 13;

in every two adjacent battery pieces 11 of the battery string 10, an overlapping area exists between the back surface of the first battery piece and the front surface of the second battery piece;

a part or all of the conductive structure 12 is located in a partial region of the overlapping region and is used for connecting two adjacent battery pieces 11 in series;

a part or all of the supporting heat transfer blocks 13 are disposed in the overlapping region where the conductive structures 12 are not disposed, so as to dissipate heat from the battery cells 11.

Claim 2 and the solar cell module according to claim 1, wherein in the case where a part of the support heat transfer block 13 is provided in the overlapping region,

the remaining portion of the support heat transfer block 13 is located at the rear surface of the first battery cell.

The solar cell module according to claim 3 or 1 or 2, wherein the solar cell module further comprises a solar cell module,

the battery string 10 is a stitch-welded battery string or a shingled battery string.

Claim 4 and claim 3 are also directed to the solar cell module, wherein, in the case where the cell string 10 is the stitch-bonded cell string,

the supporting heat transfer blocks 13 are alternately arranged with the conductive structures 12.

The assembly according to claim 5 or 4, wherein,

the length of the supporting heat transfer block 13 is not less than the width of the overlapping area along the flow direction of the conductive structure 12.

The solar cell module according to claim 6 or 3, wherein, in the case where the cell string 10 is the shingled cell string,

the supporting heat transfer block 13 is disposed on at least one side of the conductive structure 12.

The assembly of claim 7 or 6, wherein the sum of the width of the conductive structure 12 and the width of the support heat transfer block 13 is not less than the width of the overlapping region.

Technical means 8, the assembly according to technical means 2, further comprising:

the conductive structure 12 and the supporting heat transfer block 13 have the same height.

Technical scheme 9, according to any one of technical scheme 1, 2, 4 ~ 8 solar module, its characterized in that, conducting structure 12 is the conducting strip or metal solder strip.

Technical solution 10 and the solar cell module according to any one of technical solutions 1, 2, 4 to 8, characterized in that,

the support heat transfer block 13 includes: any one or more polymers of silicone, polyolefin, polyurethane, epoxy, and acrylic glue, and any one or more thermally conductive materials of metal, polymer matrix, graphite, and ceramic materials.

Technical means 11 and the solar cell module according to technical means 1, further comprising:

the solar cell module comprises cover glass 20, a front packaging adhesive film 30, a rear packaging adhesive film 40 and a photovoltaic back panel 50, wherein the solar cell module is formed by sequentially assembling the cover glass 20, the front packaging adhesive film 30, the cell string 10, the rear packaging adhesive film 40 and the photovoltaic back panel 50.

The solar cell module according to claim 12 or 1, wherein the support heat transfer block 13 includes support portions 131 and heat transfer portions 132, and the support portions 131 and the heat transfer portions 132 are alternately arranged in an overlapping direction of two adjacent cells 11.

The solar cell module according to claim 13 or 12, wherein,

the support portion 131 includes: any one or more polymers of organic silicon, polyolefin, polyurethane, epoxy resin and acrylic glue;

the heat transfer portion 132 includes: any one or more of a metal, a polymer matrix, graphite, and a ceramic material.

Technical solution 14, a method for manufacturing a solar cell module, comprising:

a1: providing a battery cell 11 having a plurality of supporting heat transfer blocks 13 on a surface thereof;

a2: the plurality of battery pieces 11 are connected in series through the conductive structure 12, an overlapping area exists between every two adjacent battery pieces 11, a part or all of the conductive structure 12 is located in a partial area of the overlapping area, and a part or all of the supporting heat transfer block 13 is located in an area where the conductive structure 12 is not located in the overlapping area.

Technical solution 15 and the manufacturing method according to technical solution 14 are characterized in that the battery piece 11 is a full-sheet battery piece, and step a1 includes:

a11: determining the position of the supporting heat transfer block 13 to be arranged on the battery piece;

a12: the support heat transfer blocks 13 are formed on the battery cell 11 according to the positions where the support heat transfer blocks 13 are to be arranged.

The manufacturing method according to claim 16 or 14, wherein the battery piece is a sliced battery piece, and step a1 includes:

a11': providing a whole battery piece;

a12': determining the position of the support heat transfer block 13 to be arranged on the whole battery piece according to the position of the support heat transfer block 13 on the whole battery piece;

a13': forming the supporting heat transfer blocks 13 on the whole battery plates according to the positions to be arranged;

a14': and cutting the whole battery piece formed with the supporting heat transfer blocks 13 to obtain a sliced battery piece with the supporting heat transfer blocks 13.

The manufacturing method according to claim 17 or 15 or 16, characterized in that the support heat transfer block 13 is formed by screen printing or dispensing.

The above description is only for the purpose of facilitating an understanding of the structure, method and core concepts of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the principles of the invention, and these changes and modifications also fall within the scope of the appended claims.