Photovoltaic module

Abstract

The present application relates to the technical field of photovoltaics. Provided is a photovoltaic module. The photovoltaic module comprises one or more battery strings, wherein each battery string comprises at least one series unit. The series unit comprises at least one conductive interconnect, and a first battery piece and a second battery piece that are adjacent to each other in the extension direction of the conductive interconnect, wherein the conductive interconnect is electrically connected to a front electrode pad of the first battery piece and a back electrode pad of the second battery piece. The distance between a first piece edge and a front electrode pad closely adjacent to the first piece edge is D1, the distance between a second piece edge and a front electrode pad closely adjacent to the second piece edge is D3, the distance between a fourth piece edge and a back electrode pad closely adjacent to the fourth piece edge is D2, and the distance between a third piece edge and a back electrode pad closely adjacent to the third piece edge is D4; and the sum of D1 and D2 is less than the sum of D3 and D4.

Description

Photovoltaic panels

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on February 27, 2024, with application number 202420365700.X and titled “A Battery String and Photovoltaic Module,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic module. Background Art

[0004] Solar cells or cells can convert solar energy into electrical energy. They utilize clean energy and therefore have broad application prospects.

[0005] Because a single cell outputs a low voltage, a certain number of cells are typically connected in series to form a battery string to expand its application scenarios. However, existing battery strings suffer from issues such as cell edge warping, a high risk of cell cracking and fragmentation, and poor performance. Summary of the Invention

[0006] The present application provides a photovoltaic module, which aims to solve the problems of the existing photovoltaic module, such as the edges of the battery cells of the battery string are easy to warp, the risk of hidden cracks and fragments of the battery cells is high, and the performance is poor.

[0007] A photovoltaic module comprising one or more cell strings;

[0008] The battery string includes: at least one series-connected cell;

[0009] The series unit includes: at least one conductive interconnection member, and a first battery cell and a second battery cell adjacent to each other in an extension direction of the conductive interconnection member;

[0010] The first battery cell and the second battery cell respectively include: a battery body and an electrode structure; wherein the battery body includes: two opposite battery edges, and opposite first and second surfaces; wherein the electrode structure includes: a plurality of front electrode disks and a plurality of back electrode disks, wherein the plurality of front electrode disks are located on the first surface, and the plurality of back electrode disks are located on the second surface;

[0011] The conductive interconnect is electrically connected to the front electrode disk of the first battery cell and the back electrode disk of the second battery cell, and in the extension direction of the conductive interconnect, the first edge and the second edge of the first battery cell, and the third edge and the fourth edge of the second battery cell are arranged in sequence;

[0012] Among them, in the extension direction of the conductive interconnection:

[0013] The distance between the edge of the first sheet and the front electrode disk next to the edge of the first sheet is D1,

[0014] The distance between the second edge and the front electrode pad adjacent to the second edge is D3.

[0015] The distance between the fourth edge and the back electrode disk adjacent to the fourth edge is D2.

[0016] The distance between the edge of the third sheet and the back electrode disk adjacent to the edge of the third sheet is D4.

[0017] Furthermore, the sum of D1 and D2 is smaller than the sum of D3 and D4.

[0018] In the present application, in the series unit, the conductive interconnect is electrically connected to the front electrode disk of the first cell and the back electrode disk of the second cell. Thus, along the extension direction of a conductive interconnect, the conductive interconnect mainly extends to cover: the front electrode disk adjacent to the edge of the first cell, to the edge of the second cell, to the edge of the third cell, to the back electrode disk adjacent to the edge of the fourth cell. Here, the disk edge of the front electrode disk adjacent to the edge of the first cell is roughly the starting conductive interconnection point of the conductive interconnect, and the disk edge of the back electrode disk adjacent to the edge of the fourth cell is roughly the ending conductive interconnection point of the conductive interconnect. In other words, along the extension direction of the conductive interconnect, the conductive interconnect mainly needs to cover: the sum of the sizes of the first cell and the second cell, minus the distance D1 between the edge of the first cell and the front electrode disk adjacent to the edge of the first cell, and minus the distance D2 between the edge of the fourth cell and the back electrode disk adjacent to the edge of the fourth cell. That is, the conductive interconnect needs to pass through: the distance D3 between the second sheet edge and the front electrode disk adjacent to the second sheet edge, and the distance D4 between the third sheet edge and the back electrode disk adjacent to the third sheet edge; but does not need to pass through: the distance D1 between the first sheet edge and the front electrode disk adjacent to the first sheet edge, and the distance D2 between the fourth sheet edge and the back electrode disk adjacent to the fourth sheet edge. In the present application, the sum of D1 and D2 is less than the sum of D3 and D4. By increasing the sum of D3 and D4, the bending freedom of the conductive interconnect is increased, the problem of warping of the edge of the cell caused by the welding process is reduced, and the stress of the conductive interconnect on the edge of the cell during the lamination process is reduced, the risk of hidden cracks and fragments of the cell is reduced, and the reliability of the photovoltaic module is improved; in order to avoid the problem of a decrease in the welding area between the conductive interconnect (such as the welding ribbon) and the cell due to the increase in the sum of D3 and D4, thereby causing an increase in contact resistance, the sum of D1 and D2 is also reduced, thereby ensuring that the welding area between the conductive interconnect and the cell remains unchanged or increases, maintaining or reducing the contact resistance, improving the conductive performance of the conductive interconnect, and improving the power of the photovoltaic module.

[0019] Optionally, the first sheet edge is a chamfered edge having a chamfer, and the second sheet edge is an edge without a chamfer; or, the first sheet edge is an edge without a chamfer, and the second sheet edge is a chamfered edge; and

[0020] The third sheet edge is a chamfered edge, and the fourth sheet edge is an edge without chamfers; or, the third sheet edge is an edge without chamfers, and the fourth sheet edge is a chamfered edge.

[0021] Optionally, a ratio of the sum of D3 and D4 to the sum of D1 and D2 is greater than 1 and less than 2.5.

[0022] Optionally, a ratio of the sum of D3 and D4 to the sum of D1 and D2 is greater than 1.5 and less than 2.

[0023] Optionally, the electrode structure further comprises:

[0024] a plurality of parallel distributed front collector grid lines, the front collector grid lines being located on the first surface and electrically connected to the front electrode pads; and

[0025] A plurality of parallel distributed back collector grid lines, the back collector grid lines are located on the second surface and are electrically connected to the back electrode disk;

[0026] There is a second distance between two adjacent front collector grid lines, and a third distance between two adjacent back collector grid lines;

[0027] wherein D1 is greater than 2 times the second spacing and less than 11 times the second spacing; and / or,

[0028] D3 is greater than 2 times the second spacing and less than 11 times the second spacing; and / or,

[0029] D2 is greater than 2 times the third spacing and less than 11 times the third spacing; and / or,

[0030] D4 is greater than 2 times the third distance and less than 11 times the third distance.

[0031] Optionally, D1 is 2 mm to 15 mm; and / or,

[0032] D2 is 2 mm to 15 mm; and / or,

[0033] D3 is 2 mm to 15 mm; and / or,

[0034] D4 is 2mm to 15mm.

[0035] Optionally, D3 is greater than D1.

[0036] Optionally, the difference between D3 and D1 is 1 mm to 10 mm; and / or,

[0037] The electrode structure also includes: a plurality of parallel distributed front collector grid lines, the front collector grid lines are located on the first surface and are electrically connected to the front electrode disk; wherein, there is a second spacing between two adjacent front collector grid lines, and wherein, the difference between D3 and D1 is greater than 1 times the second spacing and less than 6 times the second spacing.

[0038] Optionally, D4 is greater than D2.

[0039] Optionally, the difference between D4 and D2 is 0.5 mm to 10 mm; and / or,

[0040] The electrode structure also includes: a plurality of parallel distributed back collector grid lines, which are located on the second surface and electrically connected to the back electrode disk; wherein, there is a third spacing between two adjacent back collector grid lines, and wherein the difference between D4 and D2 is greater than 1 times the third spacing and less than 6 times the third spacing.

[0041] Optionally, in the extension direction of the conductive interconnect:

[0042] The distance between the starting conductive interconnection point of the conductive interconnection piece and the edge of the first sheet is D5,

[0043] The distance between the termination conductive interconnection point of the conductive interconnection piece and the edge of the fourth sheet is D6.

[0044] Furthermore, D5 and D6 are not equal.

[0045] Optionally, D5 is greater than D6.

[0046] Optionally, the electrode structure further comprises:

[0047] a plurality of parallel distributed front collector grid lines, the front collector grid lines being located on the first surface and electrically connected to the front electrode pads; and

[0048] A plurality of parallel distributed back collector grid lines, the back collector grid lines are located on the second surface and are electrically connected to the back electrode disk;

[0049] There is a second distance between two adjacent front collector grid lines, and a third distance between two adjacent back collector grid lines;

[0050] in,

[0051] D5 is greater than 1 times the second spacing and less than 11 times the second spacing; and / or,

[0052] D6 is greater than 1 times the third spacing and less than 11 times the third spacing; and / or,

[0053] D5 is 0.5 mm to 15 mm; and / or,

[0054] D6 is 0.5mm to 15mm.

[0055] Optionally, in the extension direction of the conductive interconnect:

[0056] The distance between the starting conductive interconnection point of the conductive interconnection member and the front electrode pad adjacent to the edge of the first sheet is D7.

[0057] The distance between the termination conductive interconnection point of the conductive interconnection piece and the back electrode pad adjacent to the edge of the fourth sheet is D8.

[0058] Furthermore, D7 and D8 are not equal.

[0059] Optionally, D7 is smaller than D8.

[0060] Optionally, the electrode structure further comprises:

[0061] a plurality of parallel distributed front collector grid lines, the front collector grid lines being located on the first surface and electrically connected to the front electrode pads; and

[0062] A plurality of parallel distributed back collector grid lines, the back collector grid lines are located on the second surface and are electrically connected to the back electrode disk;

[0063] There is a second distance between two adjacent front collector grid lines, and a third distance between two adjacent back collector grid lines;

[0064] in,

[0065] D7 is greater than 1 times the second spacing and less than 5 times the second spacing; and / or,

[0066] D8 is greater than 1 times the third spacing and less than 5 times the third spacing; and / or,

[0067] D7 is 0 to 15 mm; and / or,

[0068] D8 is 0 to 15mm.

[0069] Optionally, in an extension direction of the conductive interconnect, there is a first distance between the first battery cell and the second battery cell;

[0070] The sum of D3 and D4 is greater than 1.5 times the first spacing and less than 20 times the first spacing.

[0071] Optionally, the length of the battery body is greater than or equal to the width of the battery body; and the first sheet edge, the second sheet edge, the third sheet edge, and the fourth sheet edge at least have a portion intersecting with the direction of the width of the battery body;

[0072] and / or,

[0073] A plurality of front electrode disk arrays are arranged to form a front electrode disk array, wherein the number of columns in the front electrode disk array is 6-8, the number of rows is 15-20, and the first edge, the second edge, the third edge, and the fourth edge have at least a portion that intersects with the direction in which the rows of the front electrode disk array are located; and a plurality of back electrode disk arrays are arranged to form a back electrode disk array, wherein the number of columns in the back electrode disk array is 6-8, the number of rows is 15-20, and the first edge, the second edge, the third edge, and the fourth edge have at least a portion that intersects with the direction in which the rows of the back electrode disk array are located;

[0074] and / or,

[0075] The front electrode disk includes a first inner surface facing the first surface and a first outer surface facing away from the first surface. The area of ​​the first outer surface is 0.01 mm 2 Up to 250,000 mm 2 and the back electrode disk comprises: a second inner surface facing the second surface, and a second outer surface away from the second surface, the area of ​​the second outer surface is 0.01mm 2 Up to 640000mm 2 . BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0077] FIG1 shows a schematic diagram of series connection of series units in an embodiment of the present application;

[0078] FIG2 is a schematic diagram showing the positional arrangement of cells in a series unit according to an embodiment of the present application;

[0079] FIG3 shows a schematic diagram of the positional arrangement of cells in another series-connected unit in an embodiment of the present application.

[0080] FIG4 is a schematic diagram of a front electrode disk in an embodiment of the present application.

[0081] FIG5 is a schematic diagram of a back electrode disk in an embodiment of the present application.

[0082] FIG6 is a partially enlarged schematic diagram of a series unit.

[0083] FIG7 is a schematic block diagram of a photovoltaic module in an embodiment of the present application.

[0084] Explanation of the accompanying drawings: 300-photovoltaic module, 301-cell string, 310-series cell, 1-conductive interconnection, E-extension direction of the conductive interconnection, 2-cell, 400-first cell, 500-second cell, 200-cell body, 611-first surface, 612-second surface, 621-first cell edge, 622-second cell edge, 623-third cell edge, 624-fourth cell edge, 700-electrode structure, 21-front electrode disk, 710-disk edge of the front electrode disk, 771-first inner surface, 781-first outer surface, 22-back electrode disk, 720-disk edge of the back electrode disk, 772-second inner surface, 782-second outer surface, 703-front collector grid line, 704-back collector grid line, 705-front electrode disk array, 706-back electrode disk array, 23 - edge without chamfer, 24 - chamfered edge, L1 - first distance, L2 - second distance, L3 - third distance. DETAILED DESCRIPTION

[0085] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0086] Figure 1 shows a schematic diagram of the series connection of a series unit 310 in an embodiment of the present application. Figure 2 shows a schematic diagram of the position arrangement of the battery cells 2 in a series unit 310 in an embodiment of the present application. Figure 3 shows a schematic diagram of the position arrangement of the battery cells 2 in another series unit 310 in an embodiment of the present application. Figures 1 to 3 are not schematic diagrams of a certain surface of the actual battery string 301. In order to facilitate the understanding of this application, two battery cells 2 are shown in Figures 1 to 3, where the left side shows the first surface 611 of the first battery cell 400 and the right side shows the second surface 612 of the second battery cell 500. It should be noted that all dimensions in Figure 1 are only marked for illustration and do not represent the relationship between their relative sizes. The relationship between relative sizes is subject to the text description.

[0087] FIG7 is a schematic block diagram of a photovoltaic module 300 in an embodiment of the present application. The photovoltaic module 300 includes one or more battery strings 301; each battery string 301 includes at least one series cell 310. The number of battery strings 301 included in the photovoltaic module 300 is not specifically limited. The number of series cells 310 included in a battery string 301 is not specifically limited. Within a battery string 301, adjacent series cells 310 are electrically connected. This electrical connection can be in series or in parallel, and is not specifically limited.

[0088] 1 , the series cell 310 includes at least one conductive interconnect 1, and a first cell 400 and a second cell 500 adjacent to each other in the extension direction E of the conductive interconnect 1. The conductive interconnect 1 may be a soldering ribbon, etc., and is not specifically limited thereto. The extension direction E of the conductive interconnect 1 may be the direction along which the conductive interconnect 1 extends.

[0089] Referring to Figure 1 , the first cell 400 and the second cell 500 each include a battery body 200 and an electrode structure 700 . The electrode structure 700 is used to conduct current from the cell 2. The battery body 200 refers to the portion of the cell 2 excluding the electrode structure 700 . During normal operation, the battery body 200 generates and separates charge carriers, which are holes and electrons.

[0090] The battery body 200 includes two opposing cell edges and opposing first and second surfaces 611 and 612. The first surface 611 is the surface of the cell 2 that primarily absorbs light during normal operation; the second surface 612 is opposite the first surface 611. The cell edge refers to the edge of the battery body 200 and can be an unchamfered edge 23, such as a cut edge, or a chamfered edge 24.

[0091] The electrode structure 700 includes: a plurality of front electrode disks 21 and a plurality of back electrode disks 22, wherein the plurality of front electrode disks 21 are located on the first surface 611, and the plurality of back electrode disks 22 are located on the second surface 612. Both the front electrode disks 21 and the back electrode disks 22 are used to conduct the current of the battery body 200 outward. In the electrode structure 700, the total number of the front electrode disks 21 is not specifically limited, and the total number of the back electrode disks 22 is not specifically limited. In the electrode structure 700, whether the total number of the front electrode disks 21 is equal to the total number of the back electrode disks 22 is not specifically limited. For example, the total number of the front electrode disks 21 may be equal to the total number of the back electrode disks 22, or the total number of the front electrode disks 21 may not be equal to the total number of the back electrode disks 22. In addition, it should be noted that, here, the front electrode disk 21 may be the electrode disk corresponding to the positive electrode grid line, or the electrode disk corresponding to the negative electrode grid line, and the back electrode disk 22 is the other of the two.

[0092] 1 , the conductive interconnect 1 is electrically connected to the front electrode pad 21 of the first cell 400 and the back electrode pad 22 of the second cell 500. Furthermore, in the extension direction E of the conductive interconnect 1, the first cell edge 621 and the second cell edge 622 of the first cell 400, and the third cell edge 623 and the fourth cell edge 624 of the second cell 500 are arranged in sequence. For ease of description, the cell 2 on the left is referred to as the first cell 400, and the cell 2 on the right is referred to as the second cell 500. The two cell edges of the first cell 400 are referred to as the first cell edge 621 and the second cell edge 622, and the two cell edges of the second cell 500 are referred to as the third cell edge 623 and the fourth cell edge 624. Thus, in the extension direction E of the conductive interconnect 1, the first cell edge 621 and the second cell edge 622 of the first cell 400, and the third cell edge 623 and the fourth cell edge 624 of the second cell 500 are arranged in sequence. It can be understood that in practical applications, the relative positions of the first battery cell 400 and the second battery cell 500 in the series unit 310 can be interchanged.

[0093] Continuing with reference to Figure 1, in the extension direction E of the conductive interconnect 1: the distance between the first sheet edge 621 and the front electrode disk 21 adjacent to the first sheet edge 621 is D1, the distance between the second sheet edge 622 and the front electrode disk 21 adjacent to the second sheet edge 622 is D3, the distance between the fourth sheet edge 624 and the back electrode disk 22 adjacent to the fourth sheet edge 624 is D2, the distance between the third sheet edge 623 and the back electrode disk 22 adjacent to the third sheet edge 623 is D4, and the sum of D1 and D2 is less than the sum of D3 and D4.

[0094] The “front electrode disk 21 adjacent to the first cell edge 621” can also be described as the front electrode disk 21 in the first cell 400 that is farthest from the second cell 500; the “front electrode disk 21 adjacent to the second cell edge 622” can also be described as the front electrode disk 21 in the first cell 400 that is closest to the second cell 500; the “back electrode disk 22 adjacent to the fourth cell edge 624” can also be described as the back electrode disk 22 in the second cell 500 that is farthest from the first cell 400; the “back electrode disk 22 adjacent to the third cell edge 623” can also be described as the back electrode disk 22 in the second cell 500 that is closest to the first cell 400.

[0095] D1, D2, D3, and D4 are all distances in the extension direction E of the conductive interconnect 1. Generally, D1 can be the distance between the first sheet edge 621 and the disk edge 710 of the front electrode disk 21 adjacent to the first sheet edge 621; D3 can be the distance between the second sheet edge 622 and the disk edge 710 of the front electrode disk 21 adjacent to the second sheet edge 622; D2 can be the distance between the fourth sheet edge 624 and the disk edge 720 of the back electrode disk 22 adjacent to the fourth sheet edge 624; and D4 can be the distance between the third sheet edge 623 and the disk edge 720 of the back electrode disk 22 adjacent to the third sheet edge 623.

[0096] In the extension direction E of the conductive interconnect 1, the front electrode disk 21 itself has two disk edges 710. With reference to the sheet edge immediately adjacent to the front electrode disk 21, one disk edge is close to the sheet edge, and the other disk edge is away from the sheet edge. Similarly, in the extension direction E of the conductive interconnect 1, the back electrode disk 22 itself has two disk edges 720. With reference to the sheet edge immediately adjacent to the back electrode disk 22, one disk edge is close to the sheet edge, and the other disk edge is away from the sheet edge. In this article, when referring to the disk edge of a certain electrode disk, it can refer to the disk edge of the electrode disk close to the sheet edge or the disk edge of the electrode disk away from the sheet edge. However, for D1, D2, D3, and D4, when calculating the distance, the corresponding disk edges selected for the four should be consistent. Taking Figure 1 as an example, D1 can be the distance between the first sheet edge 621 and the disk edge on the left side of the front electrode disk 21 adjacent to the first sheet edge 621 (that is, the disk edge close to the first sheet edge 621). At this time, D3 is the distance between the second sheet edge 622 and the disk edge on the right side of the front electrode disk 21 adjacent to the second sheet edge 622 (that is, the disk edge close to the second sheet edge 622). D2 is the distance between the fourth sheet edge 624 and the disk edge on the right side of the back electrode disk 22 adjacent to the fourth sheet edge 624 (that is, the disk edge close to the fourth sheet edge 624). D4 is the distance between the third sheet edge 623 and the disk edge on the left side of the back electrode disk 22 adjacent to the third sheet edge 623 (that is, the disk edge close to the third sheet edge 623). Alternatively, D1 can be the distance between the first sheet edge 621 and the disk edge on the right side of the front electrode disk 21 adjacent to the first sheet edge 621 (i.e., the disk edge away from the first sheet edge 621), in which case D3 can be the distance between the second sheet edge 622 and the disk edge on the left side of the front electrode disk 21 adjacent to the second sheet edge 622 (i.e., the disk edge away from the second sheet edge 622), D2 is the distance between the fourth sheet edge 624 and the disk edge on the left side of the back electrode disk 22 adjacent to the fourth sheet edge 624 (i.e., the disk edge away from the fourth sheet edge 624), and D4 can be the distance between the third sheet edge 623 and the disk edge on the right side of the back electrode disk 22 adjacent to the third sheet edge 623 (i.e., the disk edge away from the third sheet edge 623).

[0097] In the embodiment of the present application, in the series cell 310, the conductive interconnect 1 is electrically connected to the front electrode pad 21 of the first cell 400 and the back electrode pad 22 of the second cell 500. Thus, along the extension direction E of the conductive interconnect 1 (for example, from left to right in FIG1 ), the conductive interconnect 1 primarily extends from the front electrode pad 21 adjacent to the first cell edge 621 to the second cell edge 622, to the third cell edge 623, and to the back electrode pad 22 adjacent to the fourth cell edge 624. Here, the pad edge 710 of the front electrode pad 21 adjacent to the first cell edge 621 is roughly the starting point of the conductive interconnect 1, and the pad edge 720 of the back electrode pad 22 adjacent to the fourth cell edge 624 is roughly the ending point of the conductive interconnect 1. It will be appreciated that when the extension direction E of the conductive interconnect 1 is reversed (for example, from right to left in FIG1 ), the starting and ending points of the conductive interconnect are interchanged. In other words, along the extension direction E of the conductive interconnect 1, the conductive interconnect 1 primarily needs to cover: the sum of the dimensions of the first cell 400 and the second cell 500, minus the distance D1 between the first cell edge 621 and the front electrode pad 21 adjacent to the first cell edge 621, and minus the distance D2 between the fourth cell edge 624 and the back electrode pad 22 adjacent to the fourth cell edge 624. In other words, the conductive interconnect 1 needs to pass through: the distance D3 between the second cell edge 622 and the front electrode pad 21 adjacent to the second cell edge 622, and the distance D4 between the third cell edge 623 and the back electrode pad 22 adjacent to the third cell edge 623; but does not need to pass through: the distance D1 between the first cell edge 621 and the front electrode pad 21 adjacent to the first cell edge 621, and the distance D2 between the fourth cell edge 624 and the back electrode pad 22 adjacent to the fourth cell edge 624. In the embodiment of the present application, the sum of D1 and D2 is less than the sum of D3 and D4. By increasing the sum of D3 and D4, the bending freedom of the conductive interconnect is increased, the problem of warping of the edge of the cell caused by the welding process is reduced, and the stress of the conductive interconnect on the edge of the cell during the lamination process is reduced, the risk of hidden cracks and fragments of the cell is reduced, and the reliability of the photovoltaic module is improved; in order to avoid the problem of a reduction in the welding area between the conductive interconnect (such as a welding ribbon) and the cell due to an increase in the sum of D3 and D4, thereby causing an increase in contact resistance, the sum of D1 and D2 is also reduced, thereby ensuring that the welding area between the conductive interconnect and the cell remains unchanged or increases, maintaining or reducing the contact resistance, improving the conductive performance of the conductive interconnect, and improving the power of the photovoltaic module.

[0098] For example, in FIG1 , the extension direction E of the conductive interconnect 1 is generally from left to right. For the first cell 400, the distance between the first cell edge 621 and the leftmost front electrode pad 21 is D1, and the distance between the second cell edge 622 and the rightmost front electrode pad 21 is D3. For the second cell 500, the distance between the fourth cell edge 624 and the rightmost back electrode pad 22 is D2, and the distance between the third cell edge 623 and the leftmost back electrode pad 22 is D4. Furthermore, the sum of D1 and D2 is less than the sum of D3 and D4. The pad edge 710 of the leftmost front electrode pad 21 is generally the starting point of the conductive interconnect 1, and the pad edge 720 of the rightmost back electrode pad 22 is generally the ending point of the conductive interconnect 1. By increasing the sum of D3 and D4, the bending freedom of the conductive interconnect is increased, the problem of warping of the cell edge caused by the welding process is reduced, and the stress of the conductive interconnect on the cell edge during the lamination process is reduced, reducing the risk of hidden cracks and fragments in the cell, and improving the reliability of the photovoltaic module; in order to avoid the problem of increased contact resistance caused by a decrease in the welding area between the conductive interconnect (such as the welding ribbon) and the cell due to the increase in the sum of D3 and D4, the sum of D1 and D2 is also reduced, thereby ensuring that the welding area between the conductive interconnect and the cell remains unchanged or increases, maintaining or reducing the contact resistance, improving the conductive performance of the conductive interconnect, and improving the power of the photovoltaic module.

[0099] The two opposite edges of the battery body 200 may include an edge 23 without chamfers and a chamfered edge 24. In the series unit 310, the arrangement of the first battery cell 400 and the second battery cell 500 is flexible and diverse.

[0100] Optionally, the first sheet edge 621 is a chamfered edge 24 with a chamfer, and the second sheet edge 622 is an edge 23 without a chamfer; or, the first sheet edge 621 is an edge 23 without a chamfer, and the second sheet edge 622 is a chamfered edge 24; and the third sheet edge 623 is a chamfered edge 24, and the fourth sheet edge 624 is an edge 23 without a chamfer; or, the third sheet edge 623 is an edge 23 without a chamfer, and the fourth sheet edge 624 is a chamfered edge 24. Specifically, the first sheet edge 621 is a chamfered edge 24, and the second sheet edge 622 is an edge 23 without chamfering, and the third sheet edge 623 is a chamfered edge 24, and the fourth sheet edge 624 is an edge 23 without chamfering; or, the first sheet edge 621 is a chamfered edge 24, and the second sheet edge 622 is an edge 23 without chamfering, and the third sheet edge 623 is an edge 23 without chamfering, and the fourth sheet edge 624 is a chamfered edge 24; or, the first sheet edge 621 is an edge 23 without chamfering, and the second sheet edge 622 is a chamfered edge 24, and the third sheet edge 623 is a chamfered edge 24, and the fourth sheet edge 624 is an edge 23 without chamfering; or, the first sheet edge 621 is an edge 23 without chamfering, and the second sheet edge 622 is a chamfered edge 24, and the third sheet edge 623 is an edge 23 without chamfering, and the fourth sheet edge 624 is a chamfered edge 24. 1 , in the series cell 310, the chamfered edge 24 of the first cell 400 is adjacent to the non-chamfered edge 23 of the second cell 500. Referring to FIG2 , in the series cell 310, the non-chamfered edge 23 of the first cell 400 is adjacent to the non-chamfered edge 23 of the second cell 500. Referring to FIG3 , in the series cell 310, the chamfered edge 24 of the first cell 400 is adjacent to the chamfered edge 24 of the second cell 500.

[0101] Optionally, the ratio of the sum of D3 and D4 to the sum of D1 and D2 is greater than 1 and less than 2.5. The locations where D1 and D2 are located are not covered by the conductive interconnect 1. Although the locations where D3 and D4 are located are covered by the conductive interconnect 1, the cell and the conductive interconnect 1 are not welded. The presence of D1, D2, D3, and D4 can reduce the thermal stress introduced by the conductive interconnect 1 and the cell during the welding process due to the difference in their respective thermal expansion coefficients, effectively reducing the warping of the cell edges. Moreover, between D3 and D4, the conductive interconnect 1 bends from the front of the first cell 400 to the back of the second cell 500. When the ratio of the sum of D3 and D4 to the sum of D1 and D2 is within the aforementioned range, the warping degree of the second cell edge 622 of the first cell 400 and the third cell edge 623 of the second cell 500 is further reduced, and the risk of hidden cracks in the cell at the bend of the conductive interconnect 1 during the lamination process is also reduced, thereby improving the reliability of the photovoltaic module.

[0102] For example, the ratio of the sum of D3 and D4 to the sum of D1 and D2 can be: 1.01, or 1.1, or 1.2, or 1.3, or 1.4, or 1.5, or 1.6, or 1.71, or 1.75, or 1.8, or 1.9, or 2, or 2.1, or 2.2, or 2.3, or 2.4, or 2.499.

[0103] Optionally, the ratio of the sum of D3 and D4 to the sum of D1 and D2 is greater than 1.5 and less than 2. The locations where D1 and D2 are located are not covered by the conductive interconnect 1, and the locations where D3 and D4 are located are covered by the conductive interconnect 1, but the cell and conductive interconnect 1 are not welded. The presence of D1, D2, D3, and D4 can reduce the thermal stress introduced by the conductive interconnect 1 and the cell during the welding process due to the difference in their respective thermal expansion coefficients, effectively reducing cell edge warping. Furthermore, between D3 and D4, the conductive interconnect 1 bends from the front of the first cell 400 to the back of the second cell 500. When the ratio of the sum of D3 and D4 to the sum of D1 and D2 is within the aforementioned range, the degree of warping of the second cell edge 622 of the first cell 400 and the third cell edge 623 of the second cell 500 is further reduced, and the risk of hidden cracking of the cell at the bend of the conductive interconnect 1 during the lamination process is also reduced, thereby improving the reliability of the photovoltaic module.

[0104] For example, the ratio of the sum of D3 and D4 to the sum of D1 and D2 can be: 1.51, or 1.6, or 1.62, or 1.66, or 1.73, or 1.74, or 1.75, or 1.8, or 1.83, or 1.85, or 1.88, or 1.9, or 1.93, or 1.97, or 1.999.

[0105] Optionally, referring to Figures 1 to 3, in the extension direction E of the conductive interconnect 1, there is a first spacing L1 between the first battery cell 400 and the second battery cell 500; that is, there is a first spacing L1 between the second cell edge 622 and the third cell edge 623; wherein the sum of D3 and D4 is greater than the sum of D1, D2, and the first spacing L1.

[0106] Optionally, referring to Figures 1 to 3 , a first spacing L1 is defined between the first cell 400 and the second cell 500 in the extension direction E of the conductive interconnect 1, and the first spacing L1 is in the range of 0.5 mm to 5 mm. Thus, the first spacing L1 is appropriately sized, minimizing the risk of cell paralleling (i.e., avoiding the problem of cell breakage due to insufficient space and significant bending of the solder ribbons) and fully utilizing the space within the cell string 301.

[0107] For example, in the extension direction E of the conductive interconnect 1, there is a first spacing L1 between the first battery cell 400 and the second battery cell 500, and the first spacing L1 can be 0.5 mm, or 0.61 mm, or 0.72 mm, or 1 mm, or 1.1 mm, or 1.7 mm, or 2 mm, or 2.5 mm, or 3 mm, or 3.41 mm, or 4 mm, or 4.5 mm, or 5 mm.

[0108] Optionally, the electrode structure 700 may further include: a plurality of parallel distributed front-side collector gridlines 703. See FIG6 , which is a partially enlarged schematic diagram of FIG3 , illustrating several front-side collector gridlines 703. The front-side collector gridlines 703 are used to collect carriers from the battery body 200. The front-side collector gridlines 703 are located on the first surface 611 of the battery body 200 and are electrically connected to the front-side electrode disk 21.

[0109] 6 , there is a second distance L2 between two adjacent front collector grid lines 703 . The direction of the second distance L2 is perpendicular to the extending direction of each front collector grid line 703 .

[0110] Optionally, D1 is greater than 2 times the second spacing L2 and less than 11 times the second spacing L2. When D1 is less than 2 times the second spacing L2, the distance between the conductive interconnect 1 and the first edge 621 of the first cell 400 is too close. Although the current collection capability can be improved, the cell is severely warped and stress is concentrated, which can easily cause cell fragmentation. In addition, the amount of conductive interconnect 1 used is greater, and the material cost and manufacturing difficulty increase. When D1 is greater than 11 times the second spacing L2, the current collection capability of the conductive interconnect 1 for the cell edge is reduced. When D1 is greater than 2 times the second spacing L2 and less than 11 times the second spacing L2, it can not only ensure the effective collection of current at the cell edge, but also effectively reduce the warping of the cell edge, improve welding quality and the reliability of the cell string, reduce the possibility of cell cracks and fragments, and improve the reliability of photovoltaic modules.

[0111] For example, D1 can be 2.001 times the second spacing, or 2.008 times the second spacing, or 2.1 times the second spacing, or 2.73 times the second spacing, or 3 times the second spacing, or 3.71 times the second spacing, or 4 times the second spacing, or 4.5 times the second spacing, or 5 times the second spacing, or 5.17 times the second spacing, or 6 times the second spacing, or 6.5 times the second spacing, or 6.87 times the second spacing, or 7 times the second spacing, or 7.3 times the second spacing, or 8 times the second spacing, or 8.47 times the second spacing, or 9 times the second spacing, or 9.42 times the second spacing, or 10 times the second spacing, or 10.33 times the second spacing, or 10.5 times the second spacing, or 10.99 times the second spacing.

[0112] Optionally, D3 is greater than 2 times the second spacing L2 and less than 11 times the second spacing L2. When D3 is less than 2 times the second spacing L2, the distance between the conductive interconnect 1 and the second edge 622 of the first cell 400 is too close. Although the current collection capability can be improved, the cell is severely warped, stress is concentrated, and cell fragments are easily formed. When D3 is greater than 11 times the second spacing L2, the current collection capability of the conductive interconnect 1 for the cell edge is reduced. When D3 is greater than 2 times the second spacing L2 and less than 11 times the second spacing L2, it can not only ensure the effective collection of current at the cell edge, but also effectively reduce the warping of the cell edge, improve welding quality and the reliability of the cell string, reduce the possibility of cell cracks and fragments, and improve the reliability of photovoltaic modules.

[0113] For example, D3 can be 2.001 times the second spacing, or 2.007 times the second spacing, or 2.1 times the second spacing, or 2.73 times the second spacing, or 3 times the second spacing, or 3.71 times the second spacing, or 4 times the second spacing, or 4.5 times the second spacing, or 5 times the second spacing, or 5.17 times the second spacing, or 6 times the second spacing, or 6.5 times the second spacing, or 6.87 times the second spacing, or 7 times the second spacing, or 7.3 times the second spacing, or 8 times the second spacing, or 8.47 times the second spacing, or 9 times the second spacing, or 9.42 times the second spacing, or 10 times the second spacing, or 10.33 times the second spacing, or 10.5 times the second spacing, or 10.99 times the second spacing.

[0114] Optionally, the electrode structure 700 may further include: a plurality of parallel-distributed backside collector gridlines 704. Referring to FIG. 6 , FIG. 6 is a partially enlarged schematic diagram of FIG. 3 , illustrating several backside collector gridlines 704. The backside collector gridlines 704 are used to collect carriers from the battery body 200. The backside collector gridlines 704 are located on the second surface 612 of the battery body 200 and are electrically connected to the backside electrode disk 22.

[0115] 6 , there is a third distance L3 between two adjacent back-side collecting grid lines 704 . The direction of the third distance L3 is perpendicular to the extending direction of each back-side collecting grid line 704 .

[0116] Optionally, D2 is greater than 2 times the third spacing L3 and less than 11 times the third spacing L3. When D2 is less than 2 times the third spacing L3, the distance between the conductive interconnect 1 and the fourth edge 624 of the second cell 500 is too close. Although the current collection capability can be improved, the cell is severely warped, stress is concentrated, and cell fragments are easily formed. In addition, the amount of conductive interconnect 1 used is greater, and the material cost and manufacturing difficulty increase. When D2 is greater than 11 times the third spacing L3, the current collection capability of the conductive interconnect 1 for the cell edge is reduced. When D2 is greater than 2 times the third spacing L3 and less than 11 times the third spacing L3, it can not only ensure the effective collection of current at the cell edge, but also effectively reduce the warping of the cell edge, improve welding quality and the reliability of the cell string, reduce the possibility of cell cracks and fragments, and improve the reliability of photovoltaic modules.

[0117] For example, D2 can be 2.001 times the third spacing, or 2.008 times the third spacing, or 2.1 times the third spacing, or 2.46 times the third spacing, or 3 times the third spacing, or 3.71 times the third spacing, or 4 times the third spacing, or 4.5 times the third spacing, or 5 times the third spacing, or 5.33 times the third spacing, or 6 times the third spacing, or 6.5 times the third spacing, or 6.87 times the third spacing, or 7 times the third spacing, or 7.3 times the third spacing, or 8 times the third spacing, or 8.47 times the third spacing, or 9 times the third spacing, or 9.42 times the third spacing, or 10 times the third spacing, or 10.33 times the third spacing, or 10.5 times the third spacing, or 10.99 times the third spacing.

[0118] Optionally, D4 is greater than 2 times the third spacing L3 and less than 11 times the third spacing L3. When D4 is less than 2 times the third spacing L3, the distance between the conductive interconnect 1 and the third edge 623 of the second cell 500 is too close. Although the current collection capability can be improved, the cell is severely warped, stress is concentrated, and cell fragments are easily formed. When D4 is greater than 11 times the third spacing L3, the current collection capability of the conductive interconnect 1 for the cell edge is reduced. When D4 is greater than 2 times the third spacing L3 and less than 11 times the third spacing L3, it can ensure the effective collection of current at the cell edge, effectively reduce the warping of the cell edge, improve welding quality and the reliability of the cell string, reduce the possibility of hidden cracks and fragments of the cell, and improve the reliability of the photovoltaic module.

[0119] For example, D4 ​​can be 2.001 times the third spacing, or 2.008 times the third spacing, or 2.1 times the third spacing, or 2.46 times the third spacing, or 3 times the third spacing, or 3.71 times the third spacing, or 4 times the third spacing, or 4.5 times the third spacing, or 5 times the third spacing, or 5.33 times the third spacing, or 6 times the third spacing, or 6.5 times the third spacing, or 6.87 times the third spacing, or 7 times the third spacing, or 7.3 times the third spacing, or 8 times the third spacing, or 8.5 times the third spacing, or 9 times the third spacing, or 9.42 times the third spacing, or 10 times the third spacing, or 10.33 times the third spacing, or 10.5 times the third spacing, or 10.99 times the third spacing.

[0120] Optionally, D1 is 2 mm to 15 mm. Thus, the appropriate size of D1 can ensure effective collection of current at the cell edge, effectively reduce cell edge warping, improve welding quality and cell string reliability, reduce the possibility of cell cracking and fragmentation, and improve the reliability of photovoltaic modules.

[0121] For example, D1 can be 2mm, or 2.1mm, or 2.7mm, or 3mm, or 3.41mm, or 4mm, or 4.62mm, or 5mm, or 5.5mm, or 5.72mm, or 6mm, or 6.4mm, or 7mm, or 7.28mm, or 8mm, or 8.5mm or 8.6mm, or 9mm, or 9.7mm, or 10mm, or 10.2mm, or 10.5mm, or 11mm, or 11.3mm, or 12mm, or 12.7mm, or 13mm, or 13.5mm, or 14mm, or 14.2mm, or 15mm.

[0122] Optionally, D2 is 2mm to 15mm. Thus, the size of D2 is appropriately set, which can not only ensure the effective collection of current at the cell edge, but also effectively reduce cell edge warping, improve welding quality and cell string reliability, reduce the possibility of cell cracking and fragmentation, and improve the reliability of photovoltaic modules.

[0123] For example, D2 can be 2mm, or 2.1mm, or 2.7mm, or 3mm, or 3.41mm, or 4mm, or 4.62mm, or 5mm, or 5.5mm, or 5.72mm, or 6mm, or 6.4mm, or 7mm, or 7.1mm, or 8mm, or 8.5mm or 8.6mm, or 9mm, or 9.7mm, or 10mm, or 10.2mm, or 10.5mm, or 11mm, or 11.3mm, or 12mm, or 12.7mm, or 13mm, or 13.5mm, or 14mm, or 14.2mm, or 15mm.

[0124] Optionally, D3 is 2mm to 15mm. Thus, the appropriate size of D3 can ensure effective collection of current at the cell edge, effectively reduce cell edge warping, improve welding quality and cell string reliability, reduce the possibility of cell cracking and fragmentation, and improve the reliability of photovoltaic modules.

[0125] For example, D3 can be 2mm, or 2.1mm, or 2.7mm, or 3mm, or 3.41mm, or 4mm, or 4.5mm, or 5mm, or 5.5mm, or 5.72mm, or 6mm, or 6.4mm, or 7mm, or 7.1mm, or 8mm, or 8.5mm or 8.6mm, or 9mm, or 9.7mm, or 10mm, or 10.2mm, or 10.5mm, or 11mm, or 11.3mm, or 12mm, or 12.7mm, or 13mm, or 13.5mm, or 14mm, or 14.2mm, or 15mm.

[0126] Optionally, D4 is 2mm to 15mm. Thus, the appropriate size of D4 can ensure effective collection of current at the cell edge, effectively reduce cell edge warping, improve welding quality and cell string reliability, reduce the possibility of cell cracking and fragmentation, and improve the reliability of photovoltaic modules.

[0127] For example, D4 ​​can be 2mm, or 2.1mm, or 2.7mm, or 3mm, or 3.5mm, or 4mm, or 4.62mm, or 5mm, or 5.5mm, or 5.72mm, or 6mm, or 6.4mm, or 7mm, or 7.1mm, or 8mm, or 8.5mm or 8.6mm, or 9mm, or 9.7mm, or 10mm, or 10.2mm, or 10.5mm, or 11mm, or 11.3mm, or 12mm, or 12.7mm, or 13mm, or 13.5mm, or 14mm, or 14.2mm, or 15mm.

[0128] Optionally, D3 is greater than D1. Given a fixed size for the first surface 611, limiting D3 to a value greater than D1 can free up more space for D3, reducing the problem of cell edge warping caused by the welding process. It also reduces the stress of the conductive interconnects on the cell edges during the lamination process, lowering the risk of cell cracking and fragmentation, and improving the reliability of the photovoltaic module.

[0129] Optionally, D3 is greater than D1, and the difference between D3 and D1 is 1 mm to 10 mm. Thus, the difference between the two is set more reasonably, and for various types of batteries, various sizes of batteries, and different first spacings L1, it can effectively reduce the edge warping of the battery cell and ensure the effective collection of the current at the edge of the battery cell.

[0130] For example, D3 is greater than D1, and the difference between D3 and D1 can be 1 mm, or 1.1 mm, or 1.7 mm, or 2 mm, or 2.5 mm, or 3 mm, or 3.5 mm, or 4 mm, or 4.5 mm, or 5 mm, or 5.5 mm, or 5.72 mm, or 6 mm, or 6.4 mm, or 7 mm, or 7.28 mm, or 8 mm, or 8.6 mm, or 9 mm, or 9.7 mm, or 10 mm.

[0131] Optionally, the electrode structure 700 further includes: a plurality of parallel distributed front collector grid lines 703, the front collector grid lines 703 are located on the first surface 611 of the battery body 200 and are electrically connected to the front electrode disk 21, and there is a second spacing L2 between two adjacent front collector grid lines 703, wherein the difference between D3 and D1 is greater than 1 times the second spacing L2 and less than 6 times the second spacing L2. With regard to the front collector grid lines 703 and the second spacing L2, reference can be made to the relevant records above. In this way, the difference between the two is set more reasonably, and for various types of batteries, various sizes of batteries, and different first spacings L1, it can not only effectively reduce the warping of the battery cell edge, but also ensure the effective collection of the battery cell edge current.

[0132] For example, D3 is greater than D1, and the difference between D3 and D1 can be 1.001 times the second spacing, or 1.1 times the second spacing, or 1.37 times the second spacing, or 1.79 times the second spacing, or 2 times the second spacing, or 2.5 times the second spacing, or 2.71 times the second spacing, or 3 times the second spacing, or 3.27 times the second spacing, or 3.8 times the second spacing, or 4 times the second spacing, or 4.33 times the second spacing, or 4.5 times the second spacing, or 5 times the second spacing, or 5.17 times the second spacing, or 5.83 times the second spacing, or 5.99 times the second spacing.

[0133] Optionally, D4 is greater than D2. Given a certain size for the second surface 612, limiting D4 to a value greater than D2 can free up more space for D4, reducing the problem of cell edge warping caused by the welding process. It also reduces the stress of the conductive interconnects on the cell edges during the lamination process, lowering the risk of cell cracking and fragmentation, and improving the reliability of the photovoltaic module.

[0134] Optionally, D4 is greater than D2, and the difference between D4 and D2 is 0.5 mm to 10 mm. This allows for a reasonable difference between the two, effectively reducing cell edge warpage and ensuring effective current collection at the cell edges for various battery types, sizes, and different first spacings L1.

[0135] For example, D4 ​​is greater than D2, and the difference between D4 and D2 can be 0.5 mm, or 0.62 mm, or 1 mm, or 1.1 mm, or 1.7 mm, or 2 mm, or 2.5 mm, or 3 mm, or 3.5 mm, or 4 mm, or 4.5 mm, or 5 mm, or 5.5 mm, or 5.72 mm, or 6 mm, or 6.4 mm, or 7 mm, or 7.28 mm, or 8 mm, or 8.6 mm, or 9 mm, or 9.7 mm, or 10 mm.

[0136] Optionally, the electrode structure 700 further includes: a plurality of parallel distributed back collector grid lines 704, the back collector grid lines 704 are located on the second surface 612 of the battery body 200 and are electrically connected to the back electrode disk 22, and there is a third spacing L3 between two adjacent back collector grid lines 704, wherein the difference between D4 and D2 is greater than 1 times the third spacing L3 and less than 6 times the third spacing L3. With regard to the back collector grid lines 704 and the third spacing L3, reference can be made to the relevant records above. In this way, the difference between the two is set more reasonably, and for various types of batteries, various sizes of batteries, and different first spacings L1, it can not only effectively reduce the warping of the battery cell edge, but also ensure the effective collection of the battery cell edge current.

[0137] For example, D4 ​​is greater than D2, and the difference between D4 and D2 can be 1.001 times the third spacing, or 1.1 times the third spacing, or 1.37 times the third spacing, or 1.79 times the third spacing, or 2 times the third spacing, or 2.5 times the third spacing, or 2.71 times the third spacing, or 3 times the third spacing, or 3.27 times the third spacing, or 3.8 times the third spacing, or 4 times the third spacing, or 4.33 times the third spacing, or 4.5 times the third spacing, or 5 times the third spacing, or 5.17 times the third spacing, or 5.83 times the third spacing, or 5.99 times the third spacing.

[0138] Alternatively, referring to FIG1 , in the extension direction E of the conductive interconnect 1 , the distance between the starting conductive interconnect point of the conductive interconnect 1 and the first sheet edge 621 is D5, and the distance between the ending conductive interconnect point of the conductive interconnect 1 and the fourth sheet edge 624 is D6, and D5 and D6 are not equal. The configuration of the conductive interconnect 1 is flexible and diverse.

[0139] Optionally, D5 is greater than D6. That is, at the first edge 621, the conductive interconnect 1 is more indented. Since the first edge 621 is the edge of the front surface of the first battery cell 400, the front shading of the conductive interconnect 1 is reduced.

[0140] Optionally, the electrode structure 700 further includes: a plurality of parallel distributed front collector grid lines 703, the front collector grid lines 703 being located on the first surface 611 of the battery body 200 and electrically connected to the front electrode disk 21, and a second spacing L2 being provided between two adjacent front collector grid lines 703, wherein D5 is greater than 1 times the second spacing L2 and less than 11 times the second spacing L2. With regard to the front collector grid lines 703 and the second spacing L2, reference may be made to the relevant records above. In this way, the size of D5 is appropriately set, achieving a good balance in reducing warping of the cell edge and reducing front shading of the conductive interconnect 1.

[0141] For example, D5 can be 1.001 times the second spacing, 2 times the second spacing, or 2.008 times the second spacing, or 2.1 times the second spacing, or 2.46 times the second spacing, or 3 times the second spacing, or 3.71 times the second spacing, or 4 times the second spacing, or 4.5 times the second spacing, or 5 times the second spacing, or 5.33 times the second spacing, or 6 times the second spacing, or 6.5 times the second spacing, or 6.87 times the second spacing, or 7 times the second spacing, or 7.3 times the second spacing, or 8 times the second spacing, or 8.5 times the second spacing, or 9 times the second spacing, or 9.42 times the second spacing, or 10 times the second spacing, or 10.33 times the second spacing, or 10.5 times the second spacing, or 10.99 times the second spacing.

[0142] Optionally, the electrode structure 700 further includes: a plurality of parallel distributed back collector grid lines 704, the back collector grid lines 704 being located on the second surface 612 of the battery body 200 and electrically connected to the back electrode disk 22, and a third spacing L3 being provided between two adjacent back collector grid lines 704, wherein D6 is greater than 1 times the third spacing L3 and less than 11 times the third spacing L3. With regard to the back collector grid lines 704 and the third spacing L3, reference may be made to the relevant records above. In this way, the size of D6 is appropriately set, achieving a good balance in reducing warping of the cell edge and reducing front shading of the conductive interconnect 1.

[0143] For example, D6 can be 1.001 times the third spacing, 2 times the third spacing, or 2.008 times the third spacing, or 2.1 times the third spacing, or 2.46 times the third spacing, or 3 times the third spacing, or 3.71 times the third spacing, or 4 times the third spacing, or 4.5 times the third spacing, or 5 times the third spacing, or 5.33 times the third spacing, or 6 times the third spacing, or 6.5 times the third spacing, or 6.87 times the third spacing, or 7 times the third spacing, or 7.3 times the third spacing, or 8 times the third spacing, or 8.5 times the third spacing, or 9 times the third spacing, or 9.42 times the third spacing, or 10 times the third spacing, or 10.33 times the third spacing, or 10.5 times the third spacing, or 10.99 times the third spacing.

[0144] Optionally, D5 is 0.5 mm to 15 mm. In this way, the size of D5 is set appropriately, achieving a good balance in reducing the warping of the edge of the cell and reducing the front shading of the conductive interconnect 1.

[0145] For example, D5 can be 0.5mm, or 0.52mm, or 0.82mm, or 0.99mm, or 1mm, or 1.21mm, or 1.5mm, or 2mm, or 2.1mm, or 2.5mm, or 3mm, or 3.5mm, or 4mm, or 4.5mm, or 5mm, or 5.5mm, or 5.72mm, or 6mm, or 6.4mm, or 7mm, or 7.28mm, or 7.75mm, or 8mm, or 8.6mm, or 9mm, or 9.7mm, or 10mm, or 10.5mm, or 11mm, or 11.5mm, or 12mm, or 12.5mm, or 13mm, or 13mm, or 14mm, or 14.5mm, or 15mm.

[0146] Optionally, D6 is 0.5 mm to 15 mm. In this way, the size of D6 is set appropriately, achieving a good balance in reducing the warping of the edge of the cell and reducing the front shading of the conductive interconnect 1.

[0147] For example, D6 can be 0.5mm, or 0.51mm, or 0.82mm, or 0.99mm, or 1mm, or 1.22mm, or 1.5mm, or 2mm, or 2.1mm, or 2.5mm, or 3mm, or 3.5mm, or 4mm, or 4.5mm, or 5mm, or 5.5mm, or 5.72mm, or 6mm, or 6.4mm, or 7mm, or 7.28mm, or 7.75mm, or 8mm, or 8.6mm, or 9mm, or 9.7mm, or 10mm, or 10.5mm, or 11mm, or 11.5mm, or 12mm, or 12.5mm, or 13mm, or 13mm, or 14mm, or 14.5mm, or 15mm.

[0148] Alternatively, referring to Figure 1 , in the extension direction E of the conductive interconnect 1, the distance between the starting conductive interconnect point of the conductive interconnect 1 and the front electrode pad 21 adjacent to the first sheet edge 621 is D7, and the distance between the ending conductive interconnect point of the conductive interconnect 1 and the back electrode pad 22 adjacent to the fourth sheet edge 624 is D8. Furthermore, D7 and D8 are not equal. This unequal distance between D7 and D8 allows for flexible and diverse layout of the solar cells 2 and the conductive interconnect 1.

[0149] Similar to D1, D2, D3, and D4, D7 and D8 are both distances along the extension direction E of the conductive interconnect 1. Typically, D7 can be the distance between the starting conductive interconnect point of the conductive interconnect 1 and the pad edge 710 of the front electrode pad 21 adjacent to the first sheet edge 621, and D8 can be the distance between the ending conductive interconnect point of the conductive interconnect 1 and the pad edge 720 of the back electrode pad 22 adjacent to the fourth sheet edge 624. Similarly, the pad edge can refer to the pad edge of the electrode pad close to the sheet edge or the pad edge of the electrode pad away from the sheet edge; however, when calculating the distances for D7 and D8, the corresponding pad edges selected for both should remain consistent. Taking FIG1 as an example, D7 may be the distance between the starting conductive interconnection point of the conductive interconnect 1 and the left-side disk edge of the front electrode pad 21 adjacent to the first sheet edge 621 (i.e., the disk edge close to the first sheet edge 621). In this case, D8 is the distance between the ending conductive interconnection point of the conductive interconnect 1 and the right-side disk edge of the back electrode pad 22 adjacent to the fourth sheet edge 624 (i.e., the disk edge close to the fourth sheet edge 624). Alternatively, D7 may be the distance between the starting conductive interconnection point of the conductive interconnect 1 and the right-side disk edge of the front electrode pad 21 adjacent to the first sheet edge 621 (i.e., the disk edge away from the first sheet edge 621). In this case, D8 is the distance between the ending conductive interconnection point of the conductive interconnect 1 and the left-side disk edge of the back electrode pad 22 adjacent to the fourth sheet edge 624 (i.e., the disk edge away from the fourth sheet edge 624).

[0150] It should be noted that when D7 is greater than 0, it is to ensure a reliable electrical connection between the conductive interconnect 1 and the front electrode pad 21 adjacent to the first sheet edge 621. When D8 is greater than 0, it is to ensure a reliable electrical connection between the conductive interconnect 1 and the back electrode pad 22 adjacent to the fourth sheet edge 624.

[0151] Optionally, D7 is smaller than D8. In this way, the front side shading of the conductive interconnection member 1 is reduced.

[0152] Optionally, the electrode structure 700 further includes: a plurality of parallel distributed front collector grid lines 703, the front collector grid lines 703 are located on the first surface 611 of the battery body 200 and are electrically connected to the front electrode disk 21, and there is a second spacing L2 between two adjacent front collector grid lines 703, wherein D7 is greater than 1 times the second spacing L2 and less than 5 times the second spacing L2. With regard to the front collector grid lines 703 and the second spacing L2, reference can be made to the relevant records above. In this way, the size of D7 is set more appropriately, the electrical connection between the conductive interconnect 1 and the front electrode disk 21 adjacent to the first sheet edge 621 is more reliable, the effect of reducing the front shading of the conductive interconnect 1 is also better, and basically no waste of the conductive interconnect 1 will be caused. Optionally, D7 and D8 here can also satisfy that D7 is less than D8.

[0153] For example, D7 can be 1.001 times the second spacing, 2 times the second spacing, or 2.008 times the second spacing, or 2.1 times the second spacing, or 2.46 times the second spacing, or 3 times the second spacing, or 3.71 times the second spacing, or 4 times the second spacing, or 4.5 times the second spacing, or 4.99 times the second spacing.

[0154] Optionally, the electrode structure 700 also includes: a plurality of parallel distributed back collector grid lines 704, the back collector grid lines 704 are located on the second surface 612 of the battery body 200 and are electrically connected to the back electrode disk 22, and there is a third spacing L3 between two adjacent back collector grid lines 704, wherein D8 is greater than 1 times the third spacing L3 and less than 5 times the third spacing L3. With regard to the back collector grid lines 704 and the third spacing L3, reference can be made to the relevant records above. In this way, the size of D8 is set more appropriately, the electrical connection between the conductive interconnect 1 and the back electrode disk 22 adjacent to the fourth sheet edge 624 is more reliable, the effect of reducing the shading of the conductive interconnect 1 is also better, and basically no waste of the conductive interconnect 1 will be caused. Optionally, D7 and D8 here can also satisfy that D7 is less than D8.

[0155] For example, D8 can be 1.001 times the third spacing, 2 times the third spacing, or 2.008 times the third spacing, or 2.1 times the third spacing, or 2.46 times the third spacing, or 3 times the third spacing, or 3.71 times the third spacing, or 4 times the third spacing, or 4.5 times the third spacing, or 4.99 times the third spacing.

[0156] Optionally, D7 is 0 to 15 mm. This provides a suitable size for D7, ensuring a reliable electrical connection between the conductive interconnect 1 and the front electrode pad 21 adjacent to the first sheet edge 621, effectively reducing frontal light shading of the conductive interconnect 1, and substantially eliminating waste of the conductive interconnect 1. Alternatively, D7 and D8 can also satisfy the requirement that D7 is smaller than D8.

[0157] For example, D7 can be 0, or 0.1 mm, or 0.25 mm, or 0.5 mm, or 0.51 mm, or 0.82 mm, or 0.99 mm, or 1 mm, or 1.22 mm, or 1.5 mm, or 2 mm, or 2.1 mm, or 2.5 mm, or 3 mm, or 3.5 mm, or 4 mm, or 4.5 mm, or 5 mm, or 5.5 mm, or 5.72 mm, or 6 mm, or 6.4 mm, or 7 mm, or 7.28 mm, or 7.75 mm, or 8 mm, or 8.6 mm, or 9 mm, or 9.7 mm, or 10 mm, or 10.5 mm, or 11 mm, or 11.5 mm, or 12 mm, or 12.5 mm, or 13 mm, or 13 mm, or 14 mm, or 14.5 mm, or 15 mm.

[0158] Optionally, D8 is 0 to 15 mm. In this way, the size of D8 is appropriately set, and the electrical connection between the conductive interconnect 1 and the back electrode pad 22 adjacent to the fourth sheet edge 624 is more reliable. The effect of reducing light blocking of the conductive interconnect 1 is also better, and there is basically no waste of the conductive interconnect 1. Optionally, D7 and D8 here can also satisfy that D7 is smaller than D8.

[0159] For example, D8 can be 0, or 0.1 mm, or 0.25 mm, or 0.5 mm, or 0.51 mm, or 0.82 mm, or 0.9 mm, or 1 mm, or 1.22 mm, or 1.5 mm, or 2 mm, or 2.1 mm, or 2.5 mm, or 3 mm, or 3.5 mm, or 4 mm, or 4.5 mm, or 5 mm, or 5.5 mm, or 5.72 mm, or 6 mm, or 6.4 mm, or 7 mm, or 7.28 mm, or 7.75 mm, or 8 mm, or 8.6 mm, or 9 mm, or 9.7 mm, or 10 mm, or 10.5 mm, or 11 mm, or 11.5 mm, or 12 mm, or 12.5 mm, or 13 mm, or 13 mm, or 14 mm, or 14.5 mm, or 15 mm.

[0160] Optionally, referring to Figures 1 to 3 , a first spacing L1 is defined between the first cell 400 and the second cell 500 in the extension direction E of the conductive interconnect 1. The sum of D3 and D4 is greater than 1.5 times the first spacing L1 and less than 20 times the first spacing L1. This optimal sum of D3 and D4 reduces the generation of black edges between adjacent cells 2 in the battery string 301, effectively resolving the blackening issue.

[0161] For example, the sum of D3 and D4 may be 1.501 times the first spacing, or 2 times the first spacing, or 2.008 times the first spacing, or 2.1 times the first spacing, or 2.46 times the first spacing, or 3 times the first spacing, or 3.71 times the first spacing, or 4 times the first spacing, or 4.5 times the first spacing, or 5 times the first spacing, or 5.33 times the first spacing, or 6 times the first spacing, or 6.5 times the first spacing, or 6.87 times the first spacing, or 7 times the first spacing, or 7.3 times the first spacing, or 8 times the first spacing, or 8.5 times the first spacing, or 9 times the first spacing, or 9.42 times the first spacing, or 10 times the first spacing, or 10.33 times the first spacing, or 10.5 times the first spacing, or 10.75 times the first spacing, or 10.99 times the first spacing, or 11 times the first spacing, or 12.5 times the first spacing, or 13 times the first spacing, or 14.5 times the first spacing, or 15 times the first spacing, or 16.5 times the first spacing, or 17.5 times the first spacing, or 18.9 times the first spacing, or 19.99 times the first spacing.

[0162] Optionally, referring to Figures 1 to 3, the length of the battery body 200 is greater than or equal to the width of the battery body 200. Here, the difference between the length and width of the battery body 200 is not specifically limited. The extension direction E of the conductive interconnect 1 can intersect with the direction in which the length of the battery body 200 is located. Optionally, the edge of the sheet has at least a portion that intersects with the direction in which the width of the battery body 200 is located, that is, the first sheet edge 621, the second sheet edge 622, the third sheet edge 623, and the fourth sheet edge 624 have a portion that intersects with the direction in which the width of the battery body 200 is located, that is, D1, D2, D3, and D4 are all roughly along the extension direction E of the conductive interconnect 1, thereby achieving the effect of saving the conductive interconnect 1, reducing costs, and reducing splits and hidden cracks.

[0163] It should be noted that when two things intersect in this article, there is no specific limitation on the angle between the two things, for example, they can be perpendicular.

[0164] Optionally, referring to Figures 1 to 3, a plurality of front electrode disks 21 are arranged in an array to form a front electrode disk array 705, wherein the number of columns in the front electrode disk array 705 is 6-8, the number of rows is 15-20, and the first sheet edge 621, the second sheet edge 622, the third sheet edge 623, and the fourth sheet edge 624 have at least a portion that intersects with the direction of the rows of the front electrode disk array 705. In this way, the arrangement of the front electrode disks 21 in the solar cell 2 is more reasonable, which is conducive to current conduction, and the performance of the subsequently formed photovoltaic module 300 is better.

[0165] Optionally, referring to Figures 1 to 3, a plurality of back electrode disks 22 are arranged in an array to form a back electrode disk array 706, wherein the number of columns in the back electrode disk array 706 is 6-8, the number of rows is 15-20, and the first sheet edge 621, the second sheet edge 622, the third sheet edge 623, and the fourth sheet edge 624 at least have a portion that is oriented in the direction of and intersects with the rows of the back electrode disk array 706. In this way, the arrangement of the back electrode disks 22 in the cell 2 is more reasonable, which is conducive to current conduction, and the performance of the subsequently formed photovoltaic module 300 is better.

[0166] Optionally, referring to FIG4 , the front electrode disk 21 includes: a first inner surface 771 facing the first surface 611 , and a first outer surface 781 facing away from the first surface 611 , and the area of ​​the first outer surface 781 is 0.01 mm 2 Up to 250,000 mm 2 5, the back electrode disk 22 includes: a second inner surface 772 facing the second surface 612, and a second outer surface 782 away from the second surface 612, the area of ​​the second outer surface 782 is 0.01mm 2 Up to 640000mm 2 In this way, the sizes of the front electrode disk 21 and the back electrode disk 22 are more appropriate, which is conducive to the conduction of current.

[0167] It should be noted that the shape of the first outer surface 781 of the front electrode disk 21 is not specifically limited. For example, the first outer surface 781 can be rectangular, or a rectangle with rounded or chamfered corners, or a circle. It should be noted that the shape of the second outer surface 782 of the back electrode disk 22 is not specifically limited. For example, the second outer surface 782 can be rectangular, or a rectangle with rounded or chamfered corners, or a circle. The rectangle mentioned herein has equal length and width, or has a length greater than width, and this is not specifically limited.

[0168] For example, the front electrode disk 21 includes a first outer surface 781 facing away from the first surface 611 , and the area of ​​the first outer surface 781 may be 0.01 mm 2, or 0.05mm 2 , or 0.3mm 2 , or 0.89mm 2 , or 1mm 2 , or 15mm 2 , or 23mm 2 , or 100mm 2 , or 500mm 2 , or 1000mm 2 , or 8500mm 2 , or 10000mm 2 , or 35000mm 2 , or 80000mm 2 , or 100000mm 2 , or 100800mm 2 , or 125000mm 2 , or 172000mm 2 , or 200000mm 2 , or 250000mm 2 .

[0169] For example, the back electrode disk 22 includes a second outer surface 782 facing away from the second surface 612. The area of ​​the second outer surface 782 may be 0.01 mm 2 , or 0.05mm 2 , or 0.3mm 2 , or 0.89mm 2 , or 1mm 2 , or 15mm 2 , or 23mm 2 , or 100mm 2 , or 500mm 2 , or 1000mm 2 , or 8500mm 2 , or 10000mm 2 , or 35000mm 2 , or 80000mm 2 , or 100000mm 2 , or 100800mm 2 , or 172000mm 2 , or 200000mm 2 , or 250000mm 2 , or 300500mm 2 , or 320000mm 2 , or 423200mm 2 , or 574000mm2 , or 640000mm 2 .

[0170] In summary, the present application increases the bending freedom of the conductive interconnection by increasing the sum of D3 and D4, thereby reducing the problem of warping of the edge of the cell caused by the welding process, and at the same time reducing the stress of the conductive interconnection on the edge of the cell during the lamination process, reducing the risk of hidden cracks and fragments of the cell, and improving the reliability of the photovoltaic module; in order to avoid the problem of increased contact resistance caused by the increase in the sum of D3 and D4 resulting in a reduction in the welding area between the conductive interconnection (such as the welding ribbon) and the cell, the sum of D1 and D2 is also reduced, thereby ensuring that the welding area between the conductive interconnection and the cell remains unchanged or increases, maintaining or reducing the contact resistance, improving the conductive performance of the conductive interconnection, and improving the power of the photovoltaic module. More specifically, for battery cells 200 with a thickness of 50 to 150 microns, the improvements of this application, when the conductive interconnect 1 is a solder ribbon, achieve a welding force greater than or equal to 1.5 Newtons, still meeting welding requirements. The reliability of the battery string or photovoltaic module is improved by 5% or more, and the CTM (Cell to Module, the percentage of the photovoltaic module output power to the total cell power, indicating the degree of photovoltaic module power loss; a higher CTM value indicates a lower degree of photovoltaic module packaging power loss) of the resulting photovoltaic module is increased by approximately 6%, the yield is increased by approximately 5%, and the power of the photovoltaic module is increased by approximately 10W to 15W. The welding positions are staggered along the thickness of the battery cell 200, on the first surface 611 and the second surface 612, to ensure more uniform welding heat distribution, avoid cold joints and the concentration of mechanical stress, and improve the overall welding yield by 8% to 15%.

[0171] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present application are not limited by the order of the actions described, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

[0172] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0173] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are protected by this application.

Claims

1. A photovoltaic module (300), comprising at least one conductive interconnection member (1), and a first cell (400) and a second cell (500) adjacent to each other in an extension direction (E) of the conductive interconnection member (1); in, The first battery cell (400) and the second battery cell (500) respectively comprise: a battery body (200) and an electrode structure (700); wherein the battery body (200) comprises: two opposite edges, and opposite first surfaces (611) and second surfaces (612); wherein the electrode structure (700) comprises: a plurality of front electrode disks (21) and a plurality of back electrode disks (22), wherein the plurality of front electrode disks (21) are located on the first surface (611), and the plurality of back electrode disks (22) are located on the second surface (612); The conductive interconnection member (1) is electrically connected to the front electrode disk (21) of the first battery cell (400) and the back electrode disk (22) of the second battery cell (500), and in the extension direction (E) of the conductive interconnection member (1), the first edge (621) and the second edge (622) of the first battery cell (400), and the third edge (623) and the fourth edge (624) of the second battery cell (500) are arranged in sequence; Wherein, in the extension direction (E) of the conductive interconnection member (1): The distance between the first sheet edge (621) and the front electrode disk (21) adjacent to the first sheet edge (621) is D1, The distance between the second sheet edge (622) and the front electrode disk (21) adjacent to the second sheet edge (622) is D3, The distance between the fourth sheet edge (624) and the back electrode disk (22) adjacent to the fourth sheet edge (624) is D2, The distance between the third sheet edge (623) and the back electrode disk (22) adjacent to the third sheet edge (623) is D4, Furthermore, the sum of D1 and D2 is smaller than the sum of D3 and D4.

2. The photovoltaic assembly (300) according to claim 1, wherein: The first sheet edge (621) is a chamfered edge with a chamfer, and the second sheet edge (622) is an edge without a chamfer; or, the first sheet edge (621) is an edge without a chamfer, and the second sheet edge (622) is a chamfered edge; and The third sheet edge (623) is a chamfered edge, and the fourth sheet edge (624) is an edge without chamfers; or, the third sheet edge (623) is an edge without chamfers, and the fourth sheet edge (624) is a chamfered edge.

3. The photovoltaic assembly (300) according to claim 1, wherein: The ratio of the sum of D3 and D4 to the sum of D1 and D2 is greater than 1 and less than 2.

5.

4. The photovoltaic assembly (300) according to claim 3, wherein: The ratio of the sum of D3 and D4 to the sum of D1 and D2 is greater than 1.5 and less than 2.

5. The photovoltaic assembly (300) according to claim 1, wherein: The electrode structure (700) further comprises: a plurality of parallel distributed front collector grid lines (703), the front collector grid lines (703) being located on the first surface (611) and electrically connected to the front electrode disk (21); and a plurality of parallel distributed backside collector grid lines (704), the backside collector grid lines (704) being located on the second surface (612) and electrically connected to the backside electrode disk (22); There is a second distance (L2) between two adjacent front collector grid lines (703), and a third distance (L3) between two adjacent back collector grid lines (704); wherein D1 is greater than 2 times the second distance (L2) and less than 11 times the second distance (L2); and / or, D3 is greater than 2 times the second distance (L2) and less than 11 times the second distance (L2); and / or, D2 is greater than 2 times the third distance (L3) and less than 11 times the third distance (L3); and / or, D4 is greater than 2 times the third distance (L3) and less than 11 times the third distance (L3).

6. The photovoltaic assembly (300) according to any one of claims 1 to 5, wherein: D1 is 2 mm to 15 mm; and / or, D2 is 2 mm to 15 mm; and / or, D3 is 2 mm to 15 mm; and / or, D4 is 2mm to 15mm.

7. The photovoltaic assembly (300) according to any one of claims 1 to 5, wherein: D3 is greater than D1.

8. The photovoltaic assembly (300) according to claim 7, wherein: The difference between D3 and D1 is 1mm to 10mm; and / or, The electrode structure (700) further comprises: a plurality of parallel distributed front collector grid lines (703), wherein the front collector grid lines (703) are located on the first surface (611) and are electrically connected to the front electrode disk (21); wherein a second spacing (L2) is provided between two adjacent front collector grid lines (703), and wherein a difference between D3 and D1 is greater than 1 times the second spacing (L2) and less than 6 times the second spacing (L2).

9. The photovoltaic assembly (300) according to any one of claims 1 to 5, wherein: D4 is greater than D2.

10. The photovoltaic assembly (300) according to claim 9, wherein: The difference between D4 and D2 is 0.5mm to 10mm; and / or, The electrode structure (700) further includes: a plurality of parallel distributed back collector grid lines (704), wherein the back collector grid lines (704) are located on the second surface (612) and are electrically connected to the back electrode disk (22); wherein a third spacing (L3) is provided between two adjacent back collector grid lines (704), and wherein a difference between D4 and D2 is greater than 1 times the third spacing (L3) and less than 6 times the third spacing (L3).

11. The photovoltaic assembly (300) according to any one of claims 1 to 5, wherein: In the extension direction (E) of the conductive interconnection member (1): The distance between the starting conductive interconnection point of the conductive interconnection member (1) and the first sheet edge (621) is D5, The distance between the termination conductive interconnection point of the conductive interconnection member (1) and the fourth sheet edge (624) is D6, Furthermore, D5 and D6 are not equal.

12. The photovoltaic assembly (300) according to claim 11, wherein: D5 is greater than D6.

13. The photovoltaic assembly (300) according to claim 11, wherein: The electrode structure (700) further comprises: a plurality of parallel distributed front collector grid lines (703), the front collector grid lines (703) being located on the first surface (611) and electrically connected to the front electrode disk (21); and a plurality of parallel distributed backside collector grid lines (704), the backside collector grid lines (704) being located on the second surface (612) and electrically connected to the backside electrode disk (22); There is a second distance (L2) between two adjacent front collector grid lines (703), and a third distance (L3) between two adjacent back collector grid lines (704); in, D5 is greater than 1 times the second distance (L2) and less than 11 times the second distance (L2); and / or, D6 is greater than 1 times the third distance (L3) and less than 11 times the third distance (L3); and / or, D5 is 0.5 mm to 15 mm; and / or, D6 is 0.5mm to 15mm.

14. The photovoltaic assembly (300) according to any one of claims 1 to 5, wherein: In the extension direction (E) of the conductive interconnection member (1): The distance between the starting conductive interconnection point of the conductive interconnection member (1) and the front electrode disk (21) adjacent to the first sheet edge (621) is D7, The distance between the terminating conductive interconnection point of the conductive interconnection member (1) and the back electrode pad (22) adjacent to the fourth sheet edge (624) is D8, Furthermore, D7 and D8 are not equal.

15. The photovoltaic assembly (300) according to claim 14, wherein: D7 is smaller than D8.

16. The photovoltaic assembly (300) according to claim 14, wherein: The electrode structure (700) further comprises: a plurality of parallel distributed front collector grid lines (703), the front collector grid lines (703) being located on the first surface (611) and electrically connected to the front electrode disk (21); and a plurality of parallel distributed backside collector grid lines (704), the backside collector grid lines (704) being located on the second surface (612) and electrically connected to the backside electrode disk (22); There is a second distance (L2) between two adjacent front collector grid lines (703), and a third distance (L3) between two adjacent back collector grid lines (704); in, D7 is greater than 1 times the second distance (L2) and less than 5 times the second distance (L2); and / or, D8 is greater than 1 times the third distance (L3) and less than 5 times the third distance (L3); and / or, D7 is 0 to 15 mm; and / or, D8 is 0 to 15mm.

17. The photovoltaic assembly (300) according to any one of claims 1 to 5, wherein: In the extension direction (E) of the conductive interconnection member (1), there is a first distance (L1) between the first battery cell (400) and the second battery cell (500); The sum of D3 and D4 is greater than 1.5 times the first distance (L1) and less than 20 times the first distance (L1).

18. The photovoltaic assembly (300) according to any one of claims 1 to 5, wherein: The length of the battery body (200) is greater than or equal to the width of the battery body (200); and the first sheet edge (621), the second sheet edge (622), the third sheet edge (623), and the fourth sheet edge (624) at least have a portion intersecting with the direction in which the width of the battery body (200) is located; and / or, The plurality of front electrode disks (21) are arranged in an array to form a front electrode disk array (705), wherein, in the front electrode disk array (705), the number of columns is 6-8, the number of rows is 15-20, and the first edge (621), the second edge (622), the third edge (623), and the fourth edge (624) at least have a portion intersecting with the direction in which the rows of the front electrode disk array (705) are located; and the plurality of back electrode disks (22) are arranged in an array to form a back electrode disk array (706), wherein, in the back electrode disk array (706), the number of columns is 6-8, the number of rows is 15-20, and the first edge (621), the second edge (622), the third edge (623), and the fourth edge (624) at least have a portion intersecting with the direction in which the rows of the back electrode disk array (706) are located; and / or, The front electrode disk (21) comprises: a first inner surface (771) facing the first surface, and a first outer surface (781) facing away from the first surface, wherein the area of ​​the first outer surface (781) is 0.01 mm 2 Up to 250,000 mm 2 and the back electrode disk (22) includes: a second inner surface (772) facing the second surface, and a second outer surface (782) facing away from the second surface, the area of ​​the second outer surface (782) is 0.01mm 2 Up to 640000mm 2 .

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