Photovoltaic module

Abstract

The utility model discloses a photovoltaic module, photovoltaic module includes: cell piece and interconnect structure spare. Cell piece includes cell piece body and connecting electrode, and connecting electrode is established on the at least one side surface of cell piece body, and connecting electrode includes grid line and connecting point, and grid line and connecting point electricity are connected, and interconnect structure spare is established in the side of connecting electrode away from cell piece body, and interconnect structure spare with the at least partial electricity of connecting electrode is connected, and the orthographic projection of interconnect structure spare and grid line on cell piece body at least partial does not coincide. Thus, make the end of grid line adjacent connecting point not with interconnect structure spare complete contact, can ensure that the end of grid line adjacent connecting point is not by interconnect structure spare surface tin layer complete consumption, thereby reduce the possibility that the end of grid line adjacent connecting point appears broken grid, ensure the normal collection of current on cell piece body, prolong the service life of grid line, improve the reliability of photovoltaic module.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic module technology, and in particular to a photovoltaic module. Background Technology

[0002] In existing technologies, during the welding process between the grid lines and the solder strip, some of the grid lines are consumed by the solder strip to form an alloy. The temperature at the solder joint is the highest during welding, resulting in the most welding alloy near the solder joint. This reduces the thickness of the main grid at the connection point with the solder joint, which can easily lead to grid breakage, affecting current collection and thus reducing the reliability of the photovoltaic module. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the purpose of the present invention is to provide a photovoltaic module that can improve the reliability of photovoltaic modules.

[0004] According to an embodiment of the present invention, a photovoltaic module includes: a solar cell and an interconnect structure. The solar cell includes a solar cell body and a connecting electrode. The connecting electrode is disposed on at least one side surface of the solar cell body and includes a grid line and a connection point. The grid line and the connection point are electrically connected. The interconnect structure is disposed on the side of the connecting electrode away from the solar cell body. The interconnect structure is electrically connected to at least a portion of the connecting electrode. The orthographic projections of the interconnect structure and the grid line on the solar cell body are at least partially non-overlapping.

[0005] According to the photovoltaic module of this utility model, by designing that at least a portion of the grid line does not completely overlap with the orthographic projection of the interconnect structure on the cell body, one end of the grid line near the connection point does not completely contact the interconnect structure. This ensures that the one end of the grid line near the connection point is not completely consumed by the tin layer on the surface of the interconnect structure, thereby reducing the possibility of grid breakage at the one end of the grid line near the connection point, ensuring normal current collection on the cell body, extending the service life of the grid line, and improving the reliability of the photovoltaic module.

[0006] In some embodiments, at least a portion of the gate line extends along a first direction, and the interconnect structure extends along the first direction; at least a portion of the gate line and the interconnect structure are spaced apart along a second direction, wherein the first direction and the second direction are different.

[0007] In some embodiments, the grid line includes a straight portion and a bent portion, the straight portion extending along a first direction, the bent portion bending toward the connection point, the bent portion having a first end connected to the straight portion and a second end connected to the connection point, and at least a portion of the bent portion deviating from the straight portion along a second direction.

[0008] In some embodiments, the bending portion includes a first grid line segment and a second grid line segment, one end of the first grid line segment is the first end, one end of the second grid line segment is electrically connected to the other end of the first grid line segment, and the other end of the second grid line segment is the second end.

[0009] In some embodiments, at least one of the first gate segment and the second gate segment extends along the first direction and deviates from the interconnect structure along the second direction.

[0010] In some embodiments, both the straight portion and the second gate segment extend along the first direction, and the first gate segment is vertically connected between the adjacent ends of the straight portion and the second gate segment.

[0011] In some embodiments, the gate line includes a plurality of bends, one end of each bend being electrically connected to an end of the straight portion adjacent to the connection point, and the other end of each bend extending along the first direction and deviating from the straight portion on both sides of the interconnect structure along the second direction.

[0012] In some embodiments, the grid line includes a plurality of straight portions and a plurality of bent portions. The plurality of straight portions extend along a first direction and are spaced apart along a second direction. One end of each of the plurality of bent portions is electrically connected to one end of each of the plurality of straight portions adjacent to the connection point. The other end of each of the plurality of bent portions extends along the first direction and deviates from the straight portions along the second direction in a direction away from each other.

[0013] In some embodiments, the distance between the other ends of the plurality of bends along the second direction is greater than the width of the interconnect structure along the second direction.

[0014] In some embodiments, the distance between the plurality of bent portions gradually increases along the direction from the straight portion toward the connection point.

[0015] In some embodiments, a plurality of the bent portions are symmetrically arranged about the straight portions.

[0016] In some embodiments, the photovoltaic module further includes: an insulating element disposed between the grid lines and the interconnect structure, the insulating element being spaced apart from the connection point.

[0017] In some embodiments, the distance along the second direction between the intersection of the plurality of the bends and the edge of the insulating member adjacent to the connection point is greater than the distance along the second direction between the interconnecting structure members.

[0018] In some embodiments, the insulating element at least covers the junction of the straight portion and the bent portion.

[0019] In some embodiments, the height of the connection point is H1, and the height of the bent portion in the thickness direction of the battery cell body is H2, wherein H2 and H1 satisfy: H2≥H1.

[0020] In some embodiments, the connection electrode includes a first connection electrode and a second connection electrode, the first connection electrode and the second connection electrode having opposite polarities, and at least one of the first connection electrode and the second connection electrode includes the gate line.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a partial schematic diagram of a photovoltaic module according to an embodiment of the present utility model; Figure 2 This is a schematic diagram showing at least a portion of the gate lines and the interconnect structure members spaced apart along a second direction according to an embodiment of the present invention. Figure 3 This is a schematic diagram showing that the grid lines according to an embodiment of the present invention include multiple straight sections and multiple bent sections; Figure 4 yes Figure 3 Enlarged schematic diagram of region P in the middle; Figure 5 This is a schematic diagram of a grid line according to an embodiment of the present invention, comprising a straight portion and multiple bent portions.

[0023] Figure label: 100. Photovoltaic modules; 10. Solar cell body; 11. First grid line; 12. Second grid line; 20. Connecting electrode; 21. Grid line; 211. Straight section; 212. Second grid line segment; 213. First grid line segment; 214. Bending section; 22. Connection point; 23. First connecting electrode; 231. First main grid line; 232. First connection point; 24. Second connecting electrode; 241. Second main grid line; 242. Second connection point; 30. Interconnecting structural components; 31. Insulating components; A. First direction; B. Second direction. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-5 A photovoltaic module 100 according to an embodiment of the present utility model is described. The photovoltaic module 100 includes: solar cells and interconnect structure 30.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the solar cell includes a solar cell body 10 and a connecting electrode 20. The connecting electrode 20 is disposed on at least one side surface of the solar cell body 10. The connecting electrode 20 includes grid lines 21 and connection points 22, which are electrically connected. An interconnecting structure 30 is disposed on the side of the connecting electrode 20 away from the solar cell body 10. The interconnecting structure 30 is electrically connected to at least a portion of the connecting electrode 20. The orthographic projections of the interconnecting structure 30 and the grid lines 21 on the solar cell body 10 do not overlap at least partially.

[0026] The grid line 21 and the connection point 22 are disposed on at least one side surface of the cell body 10 along the thickness direction of the cell body 10. The grid line 21 is an intermittent grid line, and the connection point 22 is disposed at the discontinuity of the grid line 21 and electrically connected to the grid line 21, so that the grid line 21 becomes a continuous conductive whole. The interconnect structure 30 is disposed on the side surface of the grid line 21 and the connection point 22 away from the cell body 10 along the thickness direction of the cell body 10, and the interconnect structure 30 is welded to at least a portion of the grid line 21 and the connection point 22 to form an electrical connection. The current on the cell body 10 is suitable to be collected on the connecting electrode 20 and led to the external circuit through the interconnect structure 30. In this application, along the thickness direction of the cell body 10, at least a portion of the end of the grid line 21 near the connection point 22 is misaligned with the projection of the interconnect structure 30 on the cell body 10 to prevent the end of the grid line 21 near the connection point 22 from making complete contact with the interconnect structure 30.

[0027] According to the photovoltaic module 100 of this utility model embodiment, by designing that at least a portion of the grid line 21 does not completely overlap with the orthographic projection of the interconnect structure 30 on the cell body 10, one end of the grid line 21 near the connection point 22 does not completely contact the interconnect structure 30. This ensures that one end of the grid line 21 near the connection point 22 is not completely consumed by the tin layer on the surface of the interconnect structure 30, thereby reducing the possibility of grid breakage at one end of the grid line 21 near the connection point 22, ensuring normal current collection on the cell body 10, extending the service life of the grid line 21, and improving the reliability of the photovoltaic module 100.

[0028] Optionally, the grid lines 21 and the connection points 22 are printed using silver paste or silver-copper paste.

[0029] Optionally, the interconnect structure 30 may be a solder strip.

[0030] According to some embodiments of this utility model, such as Figure 2As shown, at least a portion of the gate line 21 extends along a first direction A, and the interconnect structure 30 extends along the first direction A; at least a portion of the gate line 21 and the interconnect structure 30 are spaced apart along a second direction B, and the first direction A and the second direction B are different.

[0031] The end of the grid line 21 away from the connection point 22 extends along a first direction A. At least a portion of the end of the grid line 21 adjacent to the connection point 22 is spaced apart from the interconnecting structure 30 along a second direction B. In the thickness direction of the cell body 10, at least a portion of the end of the grid line 21 adjacent to the connection point 22 is not covered by the interconnecting structure 30. Therefore, by spaced apart from the interconnecting structure 30 along the second direction B, the contact area between the end of the grid line 21 adjacent to the connection point 22 and the interconnecting structure 30 can be reduced, thereby ensuring that the end of the grid line 21 adjacent to the connection point 22 is not completely consumed by the interconnecting structure 30, avoiding grid breakage at the end of the grid line 21 adjacent to the connection point 22, achieving normal current collection, and improving the reliability of the photovoltaic module 100.

[0032] According to some embodiments of this utility model, such as Figure 2 As shown, the grid line 21 includes a straight portion 211 and a bent portion 214. The straight portion 211 extends along a first direction A, and the bent portion 214 bends toward the connection point 22. The bent portion 214 has a first end connected to the straight portion 211 and a second end connected to the connection point 22. At least a portion of the bent portion 214 deviates from the straight portion 211 along a second direction B.

[0033] The straight portion 211 and the connection point 22 are spaced apart along the first direction A. The bent portion 214 is disposed between the straight portion 211 and the connection point 22. The bent portion 214 is connected to the straight portion 211 at its first end along the first direction A and to the connection point 22 at its second end along the first direction A. At least a portion of the bent portion 214 deviates from the straight portion 211 along the second direction B, such that at least a portion of the bent portion 214 and the interconnecting structure 30 are spaced apart along the second direction B.

[0034] Therefore, by bending the bend 214 toward the connection point 22, and by deviating at least a portion of the bend 214 from the straight portion 211 along the second direction B, the structure of the bend 214 is optimized. In the thickness direction of the cell body 10, at least a portion of the bend 214 is not covered by the interconnect structure 30, thereby reducing the contact area between the bend 214 and the interconnect structure 30, preventing the bend 214 from being completely consumed by the interconnect structure 30, reducing the possibility of grid breakage in the bend 214, extending the service life of the bend 214, and ensuring normal current collection.

[0035] According to some embodiments of this utility model, such as Figure 2As shown, the bending portion 214 includes a first grid line segment 213 and a second grid line segment 212. One end of the first grid line segment 213 is the first end, and one end of the second grid line segment 212 is electrically connected to the other end of the first grid line segment 213. The other end of the second grid line segment 212 is the second end.

[0036] The first grid segment 213 is disposed adjacent to and connected to the straight portion 211, and the second grid segment 212 is disposed adjacent to and connected to the connection point 22. One end of the first grid segment 213 connected to the straight portion 211 is the first end of the bent portion 214, and the other end of the first grid segment 213 is connected to the end of the second grid segment 212 away from the connection point 22. The other end of the second grid segment 212 connected to the connection point 22 is the second end of the bent portion 214. Thus, by providing the first grid segment 213 and the second grid segment 212, it is convenient for the straight portion 211 to form an electrical connection with the connection point 22 through the first grid segment 213 and the second grid segment 212, which facilitates the formation of a complete current loop. At the same time, it is convenient for at least a portion of the bent portion 214 to deviate from the straight portion 211 along the second direction B, making the design of the bent portion 214 more flexible.

[0037] According to some embodiments of the present invention, at least one of the first gate segment 213 and the second gate segment 212 extends along a first direction A and deviates from the interconnect structure 30 along a second direction B.

[0038] For example, one end of the first gate line segment 213 is connected to the straight section 211, and the other end of the first gate line segment 213 extends obliquely along the first direction A toward the second gate line segment 212 and along the second direction B toward the direction away from the interconnect structure 30 and is connected to the end of the second gate line segment 212 away from the connection point 22. The other end of the second gate line segment 212 extends along the first direction A toward the connection point 22 and is connected to the connection point 22.

[0039] Optionally, one end of the first gate segment 213 is connected to the straight section 211, and the other end of the first gate segment 213 extends along the first direction A toward the second gate segment 212 and is connected to the end of the second gate segment 212 away from the connection point 22. The other end of the second gate segment 212 extends obliquely along the first direction A toward the connection point 22 and along the second direction B toward the direction away from the interconnection structure 30 and is connected to the connection point 22.

[0040] Therefore, by having at least one of the first grid segment 213 and the second grid segment 212 extend along the first direction A and deviate from the interconnect structure 30 along the second direction B, it is convenient to make at least a portion of the bent portion 214 deviate from the interconnect structure 30 along the second direction B, so that at least a portion of the bent portion 214 and the interconnect structure 30 are spaced apart along the second direction B. In the thickness direction of the cell body 10, at least a portion of the bent portion 214 is not covered by the interconnect structure 30, thereby reducing the contact area between the bent portion 214 and the interconnect structure 30, avoiding the complete consumption of the bent portion 214 by the interconnect structure 30, reducing the possibility of grid breakage in the bent portion 214, extending the service life of the bent portion 214, and ensuring normal current collection.

[0041] Optionally, both the first gate segment 213 and the second gate segment 212 extend along the first direction A and deviate from the interconnect structure 30 along the second direction B.

[0042] According to some embodiments of this utility model, such as Figure 2 As shown, the straight section 211 and the second gate line segment 212 both extend along the first direction A, and the first gate line segment 213 is perpendicularly connected between the adjacent ends of the straight section 211 and the second gate line segment 212.

[0043] One end of the first grid segment 213 is connected to the straight section 211, and the other end of the first grid segment 213 extends along the second direction B in a direction away from the interconnect structure 30 and connects to the end of the second grid segment 212 away from the connection point 22. The two ends of the first grid segment 213 along the second direction B are perpendicularly connected to the straight section 211 and the second grid segment 212, respectively. Thus, by perpendicularly connecting the first grid segment 213 between the adjacent ends of the straight section 211 and the second grid segment 212, it is convenient to deviate the second grid segment 212 from the interconnect structure 30 along the second direction B, preventing the second grid segment 212 from contacting the interconnect structure 30. This avoids the second grid segment 212 being consumed by the interconnect structure 30, prevents the bent section 214 from being completely consumed by the interconnect structure 30, prevents the second grid segment 212 from breaking, ensures normal current collection, and improves the reliability of the photovoltaic module 100.

[0044] According to some embodiments of this utility model, such as Figure 5 As shown, the gate line 21 includes a plurality of bends 214. One end of each bend 214 is electrically connected to one end of the straight section 211 adjacent to the connection point 22. The other end of each bend 214 extends in a first direction A and deviates from the straight section 211 on both sides of the interconnect structure 30 along a second direction B.

[0045] In this application, the grid line 21 includes two bends 214. One end of each bend 214 adjacent to a straight section 211 is electrically connected to one end of the straight section 211 adjacent to a connection point 22. The other ends of the two bends 214 are respectively connected along... Figure 5 The second direction B extends in a direction away from each other and extends obliquely along the first direction A toward the connection point 22 and is electrically connected to the connection point 22.

[0046] Therefore, by electrically connecting one end of the multiple bends 214 to one end of the straight section 211 near the connection point 22, the connection strength between the multiple bends 214 and the straight section 211 can be improved. By having the other ends of the multiple bends 214 extend in the first direction A and deviate from the straight section 211 on both sides of the interconnecting structure 30 along the second direction B, it is easier to avoid the other ends of the multiple bends 214 contacting the interconnecting structure 30, thereby avoiding excessive consumption of the multiple bends 214 by the interconnecting structure 30, preventing the multiple bends 214 from breaking, extending the service life of the multiple bends 214, and ensuring normal current collection.

[0047] According to some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the gate line 21 includes a plurality of straight portions 211 and a plurality of bent portions 214. The plurality of straight portions 211 extend along the first direction A and along... Figure 4 The multiple bends 214 are spaced apart along the second direction B. One end of each bend 214 is electrically connected to one end of a connection point 22 adjacent to a multiple straight section 211. The other ends of the multiple bends 214 extend along the first direction A and along... Figure 3 The second direction B in the middle deviates from the straight line 211 in the direction away from each other.

[0048] In this application, the gate line 21 includes two straight portions 211 and two bent portions 214, and both straight portions 211 extend along the first direction A. Figure 4 The two bent portions 214 are spaced apart in the second direction B. The ends of the two bent portions 214 that are away from the connection point 22 are electrically connected to the ends of the corresponding straight portions 211 that are adjacent to the connection point 22. The other ends of the two bent portions 214 are respectively along... Figure 3 The second direction B extends in a direction away from each other and extends obliquely along the first direction A toward the connection point 22 and is electrically connected to the connection point 22.

[0049] Therefore, by including multiple straight portions 211 and multiple bent portions 214 in the grid line 21, the current transmission efficiency of the grid line 21 can be improved, and the output power of the photovoltaic module 100 can be increased. The multiple straight portions 211 extend along the first direction A and... Figure 4The second direction B spacing in the photovoltaic module 100 can avoid interference between multiple straight sections 211, thus improving the safety of the module. One end of each of the multiple bent sections 214 is electrically connected to one end of the adjacent connection point 22 of each of the multiple straight sections 211. The other end of each bent section 214 extends along the first direction A and along... Figure 3 The second direction B in the photovoltaic module 100 deviates from the straight section 211 in a direction away from each other, so as to avoid excessive consumption of multiple bends 214 by the interconnect structure 30, avoid grid breakage of multiple bends 214, extend the service life of multiple bends 214, ensure normal current collection, and improve the reliability of the photovoltaic module 100.

[0050] Optionally, the orthographic projection shape of the plurality of bends 214 on the battery cell body 10 can be arc-shaped.

[0051] According to some embodiments of this utility model, such as Figures 3-5 As shown, the distance between the other ends of the multiple bends 214 adjacent to the connection point 22 along the second direction B is greater than the width of the interconnect structure 30 along the second direction B. This prevents the other ends of the multiple bends 214 adjacent to the connection point 22 from being covered by the interconnect structure 30, thus avoiding excessive consumption of the other ends of the multiple bends 214 adjacent to the connection point 22 by the interconnect structure 30, preventing grid breakage at the other ends of the multiple bends 214 adjacent to the connection point 22, and ensuring normal current collection.

[0052] According to some embodiments of this utility model, such as Figures 3-5 As shown, the distance between the multiple bends 214 gradually increases along the direction from the straight section 211 toward the connection point 22. That is, along the first direction A from the straight section 211 to the connection point 22, the distance between the multiple bends 214 gradually increases. Figure 4 The spacing in the second direction B gradually increases. Therefore, by designing that the distance between the multiple bends 214 gradually increases from the straight section 211 towards the connection point 22, the structure of the multiple bends 214 is optimized, reducing the contact area between the other end of the multiple bends 214 near the connection point 22 and the interconnecting structure 30. This avoids excessive consumption of the other end of the multiple bends 214 near the connection point 22 by the interconnecting structure 30, thereby preventing grid breakage at the other end of the multiple bends 214 near the connection point 22, ensuring normal current collection, and improving the reliability of the photovoltaic module 100.

[0053] According to some embodiments of this utility model, such as Figure 5 As shown, multiple bends 214 are symmetrically arranged about the straight section 211. In this embodiment, the grid line 21 includes one straight section 211 and two bends 214, with the two bends 214 symmetrically arranged about the straight section 211. This improves the uniformity of current transmission and enhances the aesthetics of the photovoltaic module 100.

[0054] Optionally, combined Figure 3 The grid line 21 includes two straight sections 211 and two bent sections 214, and the two straight sections 211 and the two bent sections 214 are symmetrically arranged about the first direction A.

[0055] According to some embodiments of this utility model, such as Figures 2-5 As shown, the photovoltaic module 100 further includes an insulating member 31, which is disposed between the grid line 21 and the interconnect structure member 30, and the insulating member 31 is spaced apart from the connection point 22.

[0056] An insulating component 31 is disposed between the grid line 21 and the interconnect structure 30 along the thickness direction of the cell body 10. The insulating component 31 can cover part of the grid line 21, and the insulating component 31 and the connection point 22 are spaced apart along the first direction A. The insulating component 31 has high insulation properties. Therefore, by disposing of the insulating component 31 between the grid line 21 and the interconnect structure 30, the contact area between the grid line 21 and the interconnect structure 30 can be further reduced, thereby reducing the degree to which the grid line 21 is consumed by the interconnect structure 30. At the same time, by spaced the insulating component 31 and the connection point 22, during the welding process, as the curing temperature rises, the insulating component 31 can be prevented from diffusing between the connection point 22 and the interconnect structure 30, thereby avoiding poor welding at the connection point 22, improving the welding strength between the connection point 22 and the interconnect structure 30, and improving the reliability of the photovoltaic module 100.

[0057] According to some embodiments of this utility model, such as Figure 4 As shown, the distance along the second direction B between the intersection of the multiple bends 214 and the edge of the insulating member 31 near the connection point 22 is greater than the distance along the second direction B between the interconnecting structure member 30 and the interconnecting structure member 30.

[0058] In this embodiment, there are two bends 214. The ends of the two bends 214 away from the connection point 22 along the first direction A form two intersection points with the side of the insulating member 31 adjacent to the connection point 22. The two intersection points are along... Figure 4 The distance in the second direction B is greater than that along the interconnect structure 30. Figure 4 The width of the second direction B, i.e. at the connection point 22 of the two bends 214 and the insulating member 31, means that the interconnecting structure 30 will not contact the two bends 214.

[0059] Therefore, since the distance along the second direction B between the intersection of the multiple bends 214 and the edge of the insulating member 31 near the connection point 22 is greater than the distance along the second direction B between the interconnecting structure 30 and the bends 214 connected to the insulating member 31 near the connection point 22 can be avoided from being consumed by the interconnecting structure 30. Furthermore, since the distance between the multiple bends 214 gradually increases along the direction from the straight portion 211 toward the connection point 22, the bends 214 can be prevented from contacting the interconnecting structure 30, thereby reducing the contact area between the end of the grid line 21 near the connection point 22 and the interconnecting structure 30, preventing the grid line 21 near the connection point 22 from breaking, and ensuring the output power and reliability of the photovoltaic module 100.

[0060] According to some embodiments of this utility model, such as Figures 2-5 As shown, the insulating member 31 at least covers the connection between the straight portion 211 and the bent portion 214. That is, the connection between the straight portion 211 and the bent portion 214 does not contact the interconnecting structure member 30. This prevents the connection between the straight portion 211 and the bent portion 214 from being excessively worn down by the interconnecting structure member 30 and causing grid breakage, thereby improving the reliability and stability of the connection between the straight portion 211 and the bent portion 214, extending the service life of the grid line 21, ensuring normal current collection, and improving the reliability of the photovoltaic module 100.

[0061] According to some embodiments of the present invention, the height of the connection point 22 is H1, and the height of the bent portion 214 in the thickness direction of the battery cell body 10 is H2, wherein H2 and H1 satisfy: H2≥H1.

[0062] That is, the height of the bent portion 214 in the thickness direction of the cell body 10 is greater than or equal to the height of the connection point 22 in the thickness direction of the cell body 10. When the height of the bent portion 214 in the thickness direction of the cell body 10 is less than the height of the connection point 22 in the thickness direction of the cell body 10, part of the bent portion 214 will be consumed when it comes into contact with the interconnect structure 30. This can easily lead to the part of the bent portion 214 that comes into contact with the interconnect structure 30 having a smaller and smaller height in the thickness direction of the cell body 10, which can easily lead to the broken grid of the bent portion 214. Therefore, by making the height of the bending portion 214 in the thickness direction of the cell body 10 greater than or equal to the height of the connection point 22 in the thickness direction of the cell body 10, the height of the bending portion 214 in the thickness direction of the cell body 10 is optimized. Even if part of the bending portion 214 comes into contact with the interconnect structure 30 and is consumed during the welding process, the bending portion 214 can still maintain a certain height in the thickness direction of the cell body 10, thereby avoiding grid breakage of the bending portion 214, ensuring normal current collection, extending the service life of the bending portion 214, and improving the reliability of the photovoltaic module 100.

[0063] According to some embodiments of this utility model, such as Figure 1 As shown, the connecting electrode 20 includes a first connecting electrode 23 and a second connecting electrode 24, the first connecting electrode 23 and the second connecting electrode 24 have opposite polarities, and at least one of the first connecting electrode 23 and the second connecting electrode 24 includes a gate line 21.

[0064] In this embodiment, the first connecting electrode 23 and the second connecting electrode 24 are disposed on at least one side surface of the battery cell body 10 along the thickness direction of the battery cell body 10. Figure 1 The cells are arranged alternately along the second direction B. Connection point 22 includes first connection point 232 and second connection point 242. First connection electrode 23 includes first main grid line 231, first sub-grid line 11 and first connection point 232. Second connection electrode 24 includes second main grid line 241, second sub-grid line 12 and second connection point 242. The cell also includes first sub-grid line 11 and second sub-grid line 12. First sub-grid line 11 and second sub-grid line 12 both extend along the second direction B and are alternately spaced along the first direction A. First main grid line 231 and second main grid line 241 both extend along the first direction A and are alternately spaced along the second direction B. Second sub-grid line 12 adjacent to first main grid line 231 is intermittently arranged. First main grid line 231 is located at the discontinuity of second sub-grid line 12 and is spaced apart from second sub-grid line 12 along the second direction B.

[0065] Taking the first connecting electrode 23 as an example, the first connecting point 232 is electrically connected to the first main grid line 231. The first sub-grid line 11 can be electrically connected to the first main grid line 231 or to the first connecting point 232. The first main grid line 231 can be intermittently or continuously arranged along the first direction A. When the first main grid line 231 is intermittently arranged along the first direction A, the first connecting point 232 is located at the discontinuity of the first main grid line 231 and is electrically connected to the first main grid line 231. When the first main grid line 231 is intermittently arranged along the first direction A, the first connecting point 232 is located at the discontinuity of the first main grid line 231 and is electrically connected to the first main grid line 231. When 231 is continuously arranged along the first direction A, the first connection point 232 is located on the surface of the first main grid line 231 away from the battery cell body 10 along the thickness direction of the battery cell body 10. The interconnecting structure 30 is located on the surface of the first main grid line 231 and the first connection point 232 away from the battery cell body 10 along the thickness direction of the battery cell body 10, and is welded to the first main grid line 231 and the first connection point 232 respectively to form an electrical connection. The first main grid line 231 is the grid line 21 mentioned above. The second connecting electrode 24 is similar and will not be described in detail here.

[0066] Therefore, by setting the first connecting electrode 23 and the second connecting electrode 24, it is convenient to collect currents of different polarities on the cell body 10. At least one of the first connecting electrode 23 and the second connecting electrode 24 includes a grid line 21, so that one end of the grid line 21 near the connection point 22 does not completely contact the interconnect structure 30. This ensures that one end of the grid line 21 near the connection point 22 is not completely consumed by the tin layer on the surface of the interconnect structure 30, avoids grid breakage at one end of the grid line 21 near the connection point 22, ensures normal operation of the connecting electrode 20, thereby ensuring normal current collection and improving the reliability of the photovoltaic module 100.

[0067] Optionally, the insulating element 31 is also provided at the end of the second sub-grid line 12 adjacent to the first main grid line 231 and at the end of the first sub-grid line 11 adjacent to the second main grid line 241, thereby preventing the first connecting electrode 23 and the second connecting electrode 24 of different polarities from being connected, avoiding short circuits, and improving the safety and reliability of the photovoltaic module 100.

[0068] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0069] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized in that, include: A solar cell, comprising a solar cell body and a connecting electrode, wherein the connecting electrode is disposed on at least one side surface of the solar cell body, and the connecting electrode includes grid lines and connection points, wherein the grid lines and the connection points are electrically connected. An interconnecting structure is disposed on the side of the connecting electrode away from the cell body, the interconnecting structure is electrically connected to at least a portion of the connecting electrode, and the orthographic projections of the interconnecting structure and the grid lines on the cell body do not at least partially overlap.

2. The photovoltaic module according to claim 1, characterized in that, At least a portion of the gate line extends along a first direction, and the interconnect structure extends along the first direction; At least a portion of the gate lines are spaced apart from the interconnect structure along a second direction, the first direction and the second direction being different.

3. The photovoltaic module according to claim 1, characterized in that, The grid line includes a straight portion and a bent portion. The straight portion extends along a first direction, and the bent portion bends toward the connection point. The bent portion has a first end connected to the straight portion and a second end connected to the connection point. At least a portion of the bent portion deviates from the straight portion along a second direction.

4. The photovoltaic module according to claim 3, characterized in that, The bent portion includes: The first gate line segment, one end of the first gate line segment is the first end; The second gate segment has one end electrically connected to the other end of the first gate segment, and the other end of the second gate segment is the second end.

5. The photovoltaic module according to claim 4, characterized in that, At least one of the first gate segment and the second gate segment extends along the first direction and deviates from the interconnect structure along the second direction.

6. The photovoltaic module according to claim 4, characterized in that, Both the straight section and the second gate segment extend along the first direction, and the first gate segment is vertically connected between the adjacent ends of the straight section and the second gate segment.

7. The photovoltaic module according to claim 3, characterized in that, The grid line includes a plurality of bends, one end of each bend is electrically connected to one end of the straight section adjacent to the connection point, and the other end of each bend extends along the first direction and deviates from the straight section on both sides of the interconnect structure along the second direction.

8. The photovoltaic module according to claim 3, characterized in that, The grid line includes multiple straight sections and multiple bent sections. The multiple straight sections extend along the first direction and are spaced apart along the second direction. One end of each of the multiple bent sections is electrically connected to one end of each of the multiple straight sections near the connection point. The other end of each of the multiple bent sections extends along the first direction and deviates from the straight sections along the second direction in a direction away from each other.

9. The photovoltaic module according to claim 7 or 8, characterized in that, The distance between the other ends of the plurality of the bends along the second direction is greater than the width of the interconnecting structure along the second direction.

10. The photovoltaic module according to claim 7 or 8, characterized in that, The distance between the plurality of the bending portions gradually increases in the direction from the straight portion toward the connection point.

11. The photovoltaic module according to claim 7 or 8, characterized in that, The multiple bent portions are symmetrically arranged about the straight portion.

12. The photovoltaic module according to claim 7 or 8, characterized in that, Further includes: An insulating element is disposed between the grid line and the interconnecting structure, and the insulating element is spaced apart from the connection point.

13. The photovoltaic module according to claim 12, characterized in that, The distance along the second direction between the intersection of the plurality of the bent portions and the edge of the insulating member adjacent to the connection point is greater than the distance along the second direction between the interconnecting structure members.

14. The photovoltaic module according to claim 12, characterized in that, The insulating element at least covers the junction of the straight portion and the bent portion.

15. The photovoltaic module according to claim 3, characterized in that, The height of the connection point is H1, and the height of the bent portion in the thickness direction of the battery cell body is H2, wherein H2 and H1 satisfy: H2≥H1.

16. The photovoltaic module according to claim 1, characterized in that, The connection electrode includes a first connection electrode and a second connection electrode, the first connection electrode and the second connection electrode having opposite polarities, and at least one of the first connection electrode and the second connection electrode includes the gate line.

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