阅读说明：本技术 一种光伏组件 (Photovoltaic module ) 是由 郭志球 陶武松 李婷婷 张延炎 王路闯 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种光伏组件,包括太阳能电池片和用以导通相邻两块所述太阳能电池片的互联条,相邻两块太阳能电池片中至少一块设有用以为互联条让位的让位槽。太阳能电池片上设有为互联条让位的让位槽。当两块太阳能电池片相连时,二者边缘重叠,互联条位于让位槽中,因而两块太阳能电池片的边缘能够相互贴合,上方的太阳能电池片通过下方的太阳能电池片支撑,二者间支撑面积增大,避免了应力集中现象,进而避免了太阳能电池片产生隐裂,提高了光伏组件的良率。(The invention discloses a photovoltaic module which comprises solar cells and an interconnection strip for conducting two adjacent solar cells, wherein at least one of the two adjacent solar cells is provided with a yielding groove for yielding for the interconnection strip. The solar cell is provided with a yielding groove for yielding the interconnection strips. When two solar cells are connected, the edges of the two solar cells are overlapped, and the interconnection strip is positioned in the abdicating groove, so that the edges of the two solar cells can be mutually attached, the solar cell above the solar cell is supported by the solar cell below the solar cell, the supporting area between the two solar cells is increased, the stress concentration phenomenon is avoided, the solar cell is prevented from generating hidden cracks, and the yield of the photovoltaic module is improved.)

1. The utility model provides a photovoltaic module, its characterized in that includes solar wafer (1) and is used for switching on adjacent two interconnection strip (2) of solar wafer (1), adjacent two at least one is equipped with in solar wafer (1) and is used for the groove of stepping down (3) that interconnection strip (2) stepped down.

2. The photovoltaic module according to claim 1, wherein the relief groove (3) is U-shaped and extends from the edge of the solar cell sheet (1) to the inside along the axial direction of the interconnection bar (2) by a predetermined length.

3. The photovoltaic module according to claim 2, wherein the preset length is 1-20 mm, and the width of the abdicating groove (3) is 0.1-20 mm.

4. The photovoltaic module according to claim 1, characterized in that at least 5 of said solar cells (1) are connected in series to form a string.

5. Photovoltaic module according to claim 4, characterized in that the solar cell sheet (1) has a length not less than 150mm and a width not less than 10 mm.

6. The photovoltaic module according to any one of claims 1 to 5, wherein the receding groove (3) is formed at both ends of the solar cell (1) corresponding to the interconnection bar (2).

7. Photovoltaic module according to any of claims 1 to 5, characterized in that the length of the interconnection bar (2) is greater than the length of the solar cell sheet (1).

8. Photovoltaic module according to any of claims 1 to 5, characterized in that a protective cover is embedded in the relief groove (3) to protect the interconnection bar (2).

Technical Field

The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic module.

Background

With the development of solar photovoltaic cells and module technologies, the market demand for high-efficiency modules is more and more urgent. Under the current photovoltaic large environment, how to improve the unit area power generation amount is called as a focus of attention of a photovoltaic enterprise. In order to increase the power generation amount per unit area, the power generation efficiency of the photovoltaic cell can be improved, and the effective power generation area can be increased.

The photovoltaic module is composed of a plurality of battery pieces, the battery pieces are connected in series through the interconnection strip, and the interconnection strip passes through the upper part of one battery piece and enters the lower part of the next battery piece to be sequentially connected with the battery pieces. In order to eliminate the gaps between the battery pieces, the edges of the battery pieces in the prior art are usually arranged in an overlapping manner, that is, the battery pieces are alternately distributed above and below the interconnection bars, and the edges of the battery pieces are overlapped. Because the interconnection strip has a certain diameter, the edges of two adjacent battery pieces are overlapped, and the interconnection strip is positioned between the two, so that a gap is formed between the edges of the two. Gravity, wind pressure and other external pressure act on the surfaces of the cells to generate pressure on the surfaces of the cells, and the pressure at the positions of the interconnection strips is concentrated and distributed, so that the cells are prone to being hidden and cracked, and the yield of the photovoltaic module is reduced.

Therefore, how to avoid the subfissure of the battery piece is a technical problem expected in the art.

Disclosure of Invention

The invention aims to provide a photovoltaic module, wherein the solar cells are provided with the interconnection strips which are positioned in the abdicating grooves, so that the edges of two adjacent solar cells can be mutually attached without the support of the interconnection strips, and the solar cells are prevented from being hidden and cracked.

In order to achieve the above purpose, the present invention provides a photovoltaic module, which includes a solar cell and an interconnection bar for conducting two adjacent solar cells, wherein at least one of the two adjacent solar cells is provided with a yielding groove for yielding for the interconnection bar.

Preferably, the shape of the abdicating groove is U-shaped, and extends a preset length inwards from the edge of the solar cell along the axial direction of the interconnection bar.

Preferably, the preset length is 1-20 mm, and the width of the abdicating groove is 0.1-20 mm.

Preferably, at least 5 solar cells are connected in series to form a cell string.

Preferably, the length of the solar cell piece is not less than 150mm, and the width of the solar cell piece is not less than 10 mm.

Preferably, the two ends of the solar cell corresponding to the interconnection bars are provided with the abdicating grooves.

Preferably, the length of the interconnection bar is greater than the length of the solar cell sheet.

Preferably, a protective cover for protecting the interconnection strip is embedded in the concession groove.

The photovoltaic module provided by the invention comprises solar cells and an interconnection strip for conducting two adjacent solar cells, wherein at least one of the two adjacent solar cells is provided with a yielding groove for yielding the interconnection strip.

The solar cell is provided with a yielding groove for yielding the interconnection strips. When two solar cells are connected, the edges of the two solar cells are overlapped, and the interconnection strip is positioned in the abdicating groove, so that the edges of the two solar cells can be mutually attached, the solar cell above the solar cell is supported by the solar cell below the solar cell, the supporting area between the two solar cells is increased, the stress concentration phenomenon is avoided, the solar cell is prevented from generating hidden cracks, and the yield of the photovoltaic module is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a photovoltaic module provided by the present invention;

wherein the reference numerals in fig. 1 are:

the solar cell comprises a solar cell 1, interconnection bars 2 and abdicating grooves 3.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a photovoltaic device provided in the present invention.

The photovoltaic module provided by the invention comprises a solar cell 1 and an interconnection bar 2, wherein the solar cell 1 is provided with a fine grid for collecting charges generated by each part, and the interconnection bar 2 is vertical to the fine grid and used for guiding out the charges collected by the fine grid, as shown in fig. 1. Two solar cells 1 adjacent in the length direction are connected in series through the interconnection bar 2 to form a cell string, generally, the number of the solar cells 1 in the cell string is greater than or equal to 5, and the solar cells 1 are alternately distributed above and below the interconnection bar 2. In order to increase the effective power generation area, the edges of the adjacent solar cells 1 are overlapped with each other, so as to eliminate the gap between the two. The interconnection bars 2 are located between the overlapping portions of the solar cell pieces 1, and the interconnection bars 2 in the prior art occupy a certain height in the vertical direction, so that the edge of the solar cell piece 1 located above is supported by the interconnection bars 2, which causes the edge of the solar cell piece 1 to be easily subjected to a stress concentration phenomenon. In order to eliminate the space occupied by the interconnection strips 2 in the vertical direction, the solar cell piece 1 is provided with a abdicating groove 3 positioned on the periphery of the intersection point of the interconnection strips 2 and the side edge of the solar cell piece 1, and the length of the abdicating groove 3 is longer than the width of the overlapped part of the two solar cell pieces 1. After the solar cell pieces 1 are installed, the interconnection strips 2 enter the abdicating groove 3 before reaching the overlapping parts of the two solar cell pieces 1, so that the phenomenon that the edges of the upper solar cell piece 1 and the lower solar cell piece 1 are mutually attached to form obstruction by the interconnection strips 2 is avoided, the contact area between the upper solar cell piece 1 and the lower solar cell piece 1 is increased, and the stress concentration phenomenon is avoided. Of course, the interconnection bar 2 and the fine grid may extend in other directions, and are not limited herein.

Optionally, the receding groove 3 is located on the side of the solar cell 1 intersecting with the interconnection bar 2, and the solar cell 1 is generally rectangular. In a specific embodiment of the present application, the receding groove 3 is disposed on one width side of the solar cell 1, and the receding groove 3 is not disposed on the other side. When two solar wafer 1 link to each other, the width side that is equipped with the groove of stepping down 3 links to each other with the width side that does not establish the groove of stepping down 3, and the side that does not set up the groove of stepping down 3 is the overlap joint usually in the side top that is equipped with the groove of stepping down 3. The specific embodiment can further increase the effective power generation area of the photovoltaic module.

In another embodiment of this application, two width sides of solar wafer 1 all are equipped with the groove of stepping down 3, need not to adjust the direction of solar wafer 1 when installing photovoltaic module, have improved photovoltaic module's installation effectiveness.

Optionally, the shape of the abdicating groove 3 is U-shaped, as shown in fig. 1, the abdicating groove 3 extends from the edge of the solar cell piece 1 to the inner side of the solar cell piece 1 along the axial direction of the interconnection strip 2 by a preset length, thin grids are arranged between the periphery of the abdicating groove 3 and the abdicating groove 3, so that charges generated in the area between the abdicating grooves 3 can be effectively collected, and further the area between the abdicating grooves 3 can be effectively utilized. The optional range of the preset length of the yielding groove 3 is 1-20 mm, and the optional range of the width of the yielding groove 3 is 0.1-20 mm. Of course, the user can also set the preset length and the width of the abdicating groove 3 according to the requirement, and can also select abdicating grooves 3 with other shapes, such as rectangle, triangle or trapezoid.

In this embodiment, the solar wafer 1 is provided with the abdicating groove 3, and the interconnection bar 2 is arranged in the abdicating groove 3 without additionally occupying the space in the vertical direction, so that the side edges of the solar wafer 1 can be mutually attached, the stress concentration phenomenon is avoided, and the problem of hidden cracking of the solar wafer 1 is avoided.

Optionally, the length of the solar cell piece 1 is not less than 150mm, the width of the solar cell piece 1 is not less than 10mm, and the length of the interconnection bar 2 is greater than or equal to the length of the solar cell piece 1. When the interconnecting strips 2 are connected, tensile stress cannot be generated in the length direction, so that the pressure on the overlapped part of the two solar cell pieces 1 cannot be increased, and the risk of hidden cracking of the solar cell pieces 1 is reduced.

In addition, in order to further improve the stress bearing capacity of the solar cell 1, a wedge-shaped inclined plane can be arranged on one side edge of the abdicating groove 3, namely the cross section of the edge of the solar cell 1 is wedge-shaped, so that an inclined plane is generated above or below the edge of the solar cell 1, and the inclined planes on the two opposite sides are respectively positioned on the upper surface and the lower surface of the solar cell 1. When the two solar cells 1 are connected, the two wedge-shaped inclined planes are attached to each other, so that the contact area between the two solar cells 1 is further increased, the pressure on the contact surface is reduced, and the solar cells 1 are prevented from being hidden and cracked. In addition, for avoiding interconnection strip 2 to be corroded by rainwater etc., still inlayed the protection casing in the groove of stepping down 3, the protection casing can specifically be made for materials such as thermosetting plastics, and the protection casing cover is established in interconnection strip 2 top, avoids interconnection strip 2 to rust and leads to the resistance to increase.

In this embodiment, the length of the interconnection bar 2 is greater than or equal to the length of the solar cell piece 1, so that stress generated after the interconnection bar 2 is welded is prevented from acting on the solar cell piece 1. Meanwhile, the edge of the solar cell piece 1 is provided with the wedge-shaped inclined plane, if the interconnection strip 2 generates stress action due to expansion with heat and contraction with cold and the like, the solar cell piece 1 can move along the wedge-shaped inclined plane, the stress is prevented from directly acting on the solar cell piece 1, and the risk that the solar cell piece 1 is hidden and cracked is avoided.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The photovoltaic module provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.