Electrode structure for solar cells, solar cells and photovoltaic modules
By setting alternating current collector grid structures and auxiliary current collector grids at the edge of the solar cell, the short circuit problem caused by the solder ribbon piercing the insulating adhesive is solved, achieving stable carrier collection and efficient operation of the battery module.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGWEI SOLAR ENERGY (CHENGDU) CO LID
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-23
Smart Images
Figure CN224402018U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic technology, and more specifically, to the electrode structure of a solar cell, a solar cell, and a photovoltaic module. Background Technology
[0002] High-performance and aesthetically pleasing back-contact (BC) cells are currently one of the mainstream technologies. Because the P / N regions of BC cells are located on the same side of the cell and are arranged in an interlaced pattern, special attention must be paid to the short circuit problem between different polarity areas during module soldering. Currently, the opposite polarity grid lines are masked by printing insulating adhesive. However, the edge busbars and pads are generally designed separately. This results in the edge solder ribbon's tail being on top of the alternating fine grids, and the solder ribbon's tail can pierce the insulating adhesive, causing a short circuit upon contact with the opposite polarity grid.
[0003] Therefore, there is an urgent need to improve the edge grid structure to avoid short circuits caused by solder strips piercing the insulating adhesive, while not affecting the carrier collection range.
[0004] Therefore, this application is hereby submitted. Utility Model Content
[0005] The purpose of this invention is to provide an electrode structure for a solar cell, a solar cell, and a photovoltaic module that can avoid short circuits caused by solder ribbon piercing the insulating adhesive without reducing the carrier collection range.
[0006] The embodiments of this utility model can be implemented as follows:
[0007] In a first aspect, the present invention provides an electrode structure for a solar cell, comprising a plurality of first current collector lines, a plurality of second current collector lines, a first current bus line for connecting the plurality of first current collector lines, and a second current bus line for connecting the plurality of second current collector lines. Both the first and second current collector lines extend along a first direction and are alternately distributed along a second direction intersecting the first direction. Both the first and second current bus lines extend along the second direction and are alternately distributed along the first direction.
[0008] The outermost edge in the first direction is a first edge busbar. Near the first edge busbar, multiple first edge interconnect nodes are spaced along the second direction. Each first edge interconnect node is connected to two or more first edge busbars. First edge solder strips are provided on the multiple first edge interconnect nodes. The first edge interconnect nodes are connected to the first edge busbars through first edge busbar connecting lines.
[0009] The electrode structure of the solar cell has a first end and a second end opposite to the first end in a second direction. The second current collector line near the second end and located on both sides of the first edge solder strip is disconnected. A second auxiliary current collector line is provided near the second end and located between the first edge current collector line and the first edge solder strip. The disconnected second current collector line is connected by the second auxiliary current collector line. The second auxiliary current collector line is connected to the adjacent second current collector line through a second current collector line connecting line.
[0010] In an optional implementation, a first auxiliary busbar is provided between the first edge interconnect node and the second end, and the first auxiliary busbar is connected to the first collector busbar located between the first edge interconnect node and the second end.
[0011] In an optional implementation, the first auxiliary bus gate is not connected to the first edge interconnect node, the width of the first auxiliary bus gate is D1, the width of the first collector gate is d1, and the width of the first bus gate is D3, where D1, d1, and D3 satisfy d1≤D1≤D3.
[0012] In an optional implementation, there are two or more secondary current collector wires, and the secondary current collector wires are either adjacent current collector wires or non-adjacent current collector wires.
[0013] In an optional implementation, the width of the secondary auxiliary busbar is D2, the width of the secondary collector busbar is d2, and the width of the secondary busbar is D4, wherein D2, d2, and D4 satisfy d2≤D2≤D4.
[0014] And / or, the width of the secondary collector grid connection line is d, and the width of the secondary collector grid line is d2, where d and d2 satisfy d2 ≤ d ≤ 3d2.
[0015] In an optional embodiment, the first edge solder strip extends out from the first end;
[0016] And / or, electrode structures with secondary auxiliary busbars and secondary current collector connecting lines are provided at two or four corners of the solar cell.
[0017] In an optional embodiment, multiple first interconnect nodes are spaced apart on each of the first primary busbars except for the edge busbars, and each first interconnect node is connected to two or more first primary busbars. First primary solder strips extending in the second direction are provided on the multiple first interconnect nodes.
[0018] Multiple secondary interconnect nodes are spaced apart on the secondary current collector lines except for the edge current collector lines. Each secondary interconnect node is connected to more than two secondary current collector lines. Secondary solder strips extending along the second direction are provided on the multiple secondary interconnect nodes.
[0019] The width of the first-type solder strip or the first-type edge solder strip is H1, the width of the first-type busbar is D3, the partition width of the second-type busbar near the second end and located on both sides of the first-type edge solder strip is G2, and the width of the first-type interconnect node or the first-type edge interconnect node in the first direction is W. H1, D3, G2, and W satisfy: D3 ≤ H1 <G2<W。
[0020] In an optional implementation, the first edge interconnect node, the first interconnect node, and the second interconnect node are all pads, and the first edge solder strip, the first solder strip, and the second solder strip are all solder strips.
[0021] Secondly, this utility model provides a solar cell, including the electrode structure of any of the solar cells described in the foregoing embodiments.
[0022] Thirdly, this utility model provides a photovoltaic module, including the solar cell of the aforementioned embodiments.
[0023] The beneficial effects of the electrode structure, solar cell, and photovoltaic module provided by this utility model embodiment include: by changing the grid line structure at the edge of the silicon wafer, disconnecting the second current collector grid line at the end in the second direction and located on both sides of the first edge solder strip, short circuits are avoided; the disconnected second current collector grid line is connected by a second auxiliary current collector grid line, and the second auxiliary current collector grid line is connected to the adjacent second current collector grid line through a second current collector grid line connecting line, ultimately achieving grid line bypass. The electrode structure provided by this utility model can avoid short circuits caused by solder strip piercing the insulating adhesive without reducing the carrier collection range. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the overall structure of the electrode structure of the solar cell provided in this embodiment;
[0026] Figure 2 for Figure 1 A schematic diagram after the solder strips have been removed;
[0027] Figure 3 for Figure 1 A schematic diagram of the first structure at the middle edge;
[0028] Figure 4 for Figure 3 A schematic diagram after the solder strips have been removed;
[0029] Figure 5 A schematic diagram of a structure without a primary auxiliary busbar;
[0030] Figure 6 This is a schematic diagram of the second structure at the edge of the electrode structure of a solar cell;
[0031] Figure 7 A schematic diagram of a structure with multiple adjacent secondary current collector lines connected together;
[0032] Figure 8 A schematic diagram of a structure with multiple non-adjacent secondary current collector lines;
[0033] Figure 9 A schematic diagram of the structure in which the first auxiliary busbar is connected;
[0034] Figure 10 This is a schematic diagram of a structure where the first auxiliary busbars are not connected.
[0035] Icons: 100 - Electrode structure of solar cell; 001 - First end; 002 - Second end; 003 - Distribution area of solder ribbon tail; 111 - Primary current collector line; 112 - Primary current collector line; 113 - Primary edge current collector line; 114 - Primary edge interconnect node; 115 - Primary edge solder ribbon; 116 - Primary auxiliary current collector line; 117 - Primary interconnect node; 118 - Primary solder ribbon; 119 - Primary current collector line connection line; 121 - Secondary current collector line; 122 - Secondary current collector line; 123 - Secondary auxiliary current collector line; 124 - Secondary current collector line connection line; 125 - Secondary interconnect node; 126 - Secondary solder ribbon. Detailed Implementation
[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0039] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not 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.
[0040] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0041] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0042] In addition, for ease of understanding, the technical terms involved in the embodiments of this utility model are explained as follows:
[0043] Sub-grid: These are densely packed fine metal wires that cover the surface of the cell and are responsible for collecting photogenerated carriers and conducting them to the main grid.
[0044] Busbar (main grid): This is a wide metal wire on the surface of the battery. Its main function is to collect the current gathered by the secondary grid and conduct it to the external circuit. It is the "main channel" for current confluence.
[0045] The following describes in detail the overall structure, working principle, and technical effects of the electrode structure 100 of the solar cell provided by this utility model through embodiments and in conjunction with the accompanying drawings.
[0046] Please refer to Figure 1 and Figure 2This utility model embodiment provides an electrode structure 100 for a solar cell, including a plurality of first current collector grid lines 111, a plurality of first current combiner grid lines 112, a plurality of second current collector grid lines 121, and a second current combiner grid line 122. The first current collector grid lines 111 and the second current collector grid lines 121 both extend along a first direction and are alternately distributed along a second direction that intersects the first direction. The first current combiner grid lines 112 are used to connect the plurality of first current collector grid lines 111, and the second current combiner grid lines 122 are used to connect the plurality of second current collector grid lines 121. The first current combiner grid lines 112 and the second current combiner grid lines 122 both extend along the second direction and are alternately distributed along the first direction.
[0047] In other words, along the second direction, the first current collector 111 and the second current collector 121 are alternately distributed, with the second current collector 121 on both sides of the first current collector 111 and the first current collector 111 on both sides of the second current collector 121. Along the first direction, the first current collector 112 and the second current collector 122 are alternately distributed, with the second current collector 122 on both sides of the first current collector 112 and the first current collector 112 on both sides of the second current collector 122.
[0048] Multiple first-type interconnect nodes 117 (such as pads) are spaced apart on each first-type bus gate 112. Each first-type interconnect node 117 connects to two or more first-type bus gates 111, such as two, three, or more, with no limit on the specific number. First-type solder strips 118 (such as solder strips) extending along a second direction are provided on the multiple first-type interconnect nodes 117. The positions of the first-type solder strips 118 correspond to the first-type bus gates 112 and can be parallel to the first-type bus gates 112.
[0049] Similarly, multiple secondary interconnect nodes 125 (such as pads) are spaced apart on each secondary bus gate 122. Each secondary interconnect node 125 connects to two or more secondary bus gates 121, such as two, three, or more, with no limit on the specific number. Secondary solder strips 126 extending along the second direction are provided on the multiple secondary interconnect nodes 125. The positions of the secondary solder strips 126 correspond to the secondary bus gates 122 and can be parallel to the secondary bus gates 122.
[0050] At the edges, the primary bus gate 112 and the secondary bus gate 122 are generally designed separately from the pads. This results in the edge solder ribbon tail being on top of alternating fine gates, and the solder ribbon tail can pierce the insulating adhesive, causing a short circuit upon contact with the opposite-polarity fine gate. Therefore, this invention improves the structure of the outermost gate lines as follows:
[0051] Please combine Figure 1 , Figure 3 and Figure 4 The outermost edge of the first direction is a first edge busbar 113. Near the first edge busbar 113, multiple first edge interconnect nodes 114 (such as pads) are spaced apart along the second direction. Each first edge interconnect node 114 connects to two or more first edge busbars 111, such as two, three, or more; the specific number is unlimited. First edge solder strips 115 (such as solder strips) are provided on the multiple first edge interconnect nodes 114. The first edge interconnect nodes 114 are connected to the first edge busbar 113 via first edge busbar connecting lines 119. The electrode structure 100 of the solar cell has a first end 001 and a second end 002 opposite to the first end 001 in the second direction. The first edge solder strips 115 or other first solder strips 118 can all extend from the first end 001. The second edge busbars 121 near the second end 002 and located on both sides of the first edge solder strips 115 are disconnected; the number of disconnected strips is unlimited, and can be as follows: Figures 3-4 In this way, the secondary current collector line 121 is disconnected from the position of the primary edge interconnect node 114 near the first end 001 to the second end 002, so as to avoid the presence of a different polarity electrode in the area at the tail end of the solder strip, and further avoid the solder strip piercing the insulating glue and causing a short circuit.
[0052] Furthermore, a second auxiliary busbar 123 is provided near the second end 002 and between the first edge busbar 113 and the first edge solder strip 115, and the disconnected second collector busbar 121 is connected by the second auxiliary busbar 123. That is, all disconnected second collector busbars 121 are connected to the second auxiliary busbar 123. Figure 3 In the middle, the secondary auxiliary busbar 123 is divided into two segments by the primary busbar connecting line 119.
[0053] Furthermore, the secondary auxiliary busbar 123 is connected to the adjacent secondary busbar 122 via the secondary collector busbar connection line 124, and the current collected by the edge secondary collector busbar 121 is aggregated by the secondary auxiliary busbar 123 and the secondary collector busbar connection line 124.
[0054] In some embodiments, such as Figure 4 As shown, a first auxiliary busbar 116 is provided between the first edge interconnect node 114 and the second end 002. The first auxiliary busbar 116 is connected to the first collector busbar 111 located between the first edge interconnect node 114 and the second end 002 to aggregate the current collected by this part of the first collector busbar 111.
[0055] In another embodiment, such as Figure 5As shown, the first auxiliary busbar 116 can also be omitted, which can reduce the metallization area on the back of the battery, thereby reducing costs and increasing the bifaciality.
[0056] The positional relationship between the first edge solder strip 115 and the first auxiliary busbar 116 is not limited; the first edge solder strip 115 may cover part of the first auxiliary busbar 116, such as... Figure 3 As shown.
[0057] In some embodiments, the secondary current collector line connection 124 can be a single line, such as... Figure 4 As shown. The secondary current collector wire connection 124 can also have two or more wires, such as... Figure 7 and Figure 8 As shown, there can be 2, 3, or more. The number of secondary collector grid connection lines 124 depends on the length of the solder ribbon tail, which means that the primary auxiliary collector grid line 116 will not be connected to the primary edge interconnect node 114. The secondary collector grid connection lines 124 can be adjacent collector grid lines, such as... Figure 7 As shown; the secondary collector line connection 124 can also be a non-adjacent collector line, such as Figure 8 As shown.
[0058] The length of the primary auxiliary busbar 116 in the second direction is determined by the number of breaks in the secondary collector busbar 121. The primary auxiliary busbar 116 can be continuous at its second end 002, such as... Figure 9 As shown; the first auxiliary busbar 116 can also be non-continuous at the second end 002, such as... Figure 10 As shown.
[0059] In some embodiments, such as Figure 6 As shown, the first auxiliary bus gate 116 is not connected to the first edge interconnect node 114. The width of the first auxiliary bus gate 116 is D1, the width of the first collector gate 111 is d1, and the width of the first edge bus gate 113 or the first bus gate 112 is D3 (the widths of the first edge bus gate 113 and the first bus gate 112 in the middle region can be the same). D1, d1, and D3 satisfy d1≤D1≤D3. That is, the width D1 of the first auxiliary bus gate 116 can be greater than or equal to the width d1 of the first collector gate 111, while satisfying that it is less than or equal to the width D3 of the first edge bus gate 113 or the first bus gate 112. The width D1 of the first auxiliary current collector 116 is preferably within the above range, which can better collect the current of the first current collector 111 at the edge, while reducing the metallization area on the back of the battery, so as to achieve the purpose of fully collecting carriers and increasing the bifaciality of the battery.
[0060] In some embodiments, such as Figure 6 As shown, the width of the second auxiliary current - collecting grid line 123 is D2, the width of the second current - collecting grid line 121 is d2, and the width of the second current - collecting grid line 122 is D4 (not shown in the figure). D2, d2, and D4 satisfy d2 ≤ D2 ≤ D4. That is to say, the width D2 of the second auxiliary current - collecting grid line 123 is greater than or equal to the width d2 of the second current - collecting grid line 121 and less than or equal to the width D4 of the second current - collecting grid line 122. It is appropriate that the width D2 of the second auxiliary current - collecting grid line 123 is within the above range, which can better collect the current of the second current - collecting grid line 121 at the edge, achieve stable collection of carriers, make full use of the space on the back of the battery, and improve the battery efficiency.
[0061] In some embodiments, as Figure 6 shown, the width of the second current - collecting grid line connecting line 124 is d, and the width of the second current - collecting grid line 121 is d2. d and d2 satisfy d2 ≤ d ≤ 3d2. That is to say, the width d of the second current - collecting grid line connecting line 124 is greater than or equal to the width d2 of the second current - collecting grid line 121 and less than or equal to 3 times the width d2 of the second current - collecting grid line 121. When the width d of the second current - collecting grid line connecting line 124 is within the above range, it can have a larger volume of carrier transmission channels on the premise of connecting the same - pole main grids, so as to reduce the loss of carriers during transmission.
[0062] In some embodiments, as Figure 6 shown, the width of the first solder tape 118 or the first edge solder tape 115 is H1, and the first solder tape 118 and the first edge solder tape 115 can be the same. The width of the first current - collecting grid line 112 or the first edge current - collecting grid line 113 is D3, and their widths can be the same. The隔断 width of the second current - collecting grid line 121 near the second end 002 and on both sides of the first edge solder tape 115 is G2, and the width of the first interconnection node 117 or the first edge interconnection node 114 in the first direction is W. H1, D3, G2, W satisfy: D3 ≤ H1 < G2 < W. Controlling G2 and H1 within the above range can ensure that there is enough space for the solder tape to be placed between the two second current - collecting grid line partitions, avoiding lap - joint short - circuit.
[0063] In some embodiments, as Figure 3 and Figure 6As shown, the length L1 of the distribution area 003 of the solder ribbon end in the first direction is greater than or equal to the width D1 of the first auxiliary current collecting grid line 116 and less than the width G2 of the second current collecting grid line隔断 on both sides of the first auxiliary current collecting grid line 116, that is, D1 ≤ L1 < G2, which can ensure that the solder ribbon will not lap and short-circuit with the second current collecting grid line. The length L2 of the distribution area 003 of the solder ribbon end in the second direction is determined by the number of disconnections of the异性副栅 and is always greater than the length l1 of the first auxiliary current collecting grid line 116. L1 and L2 are not shown in the figure. L1 refers to the distance that the distribution area 003 of the solder ribbon end extends in the first direction, and L2 refers to the distance that the distribution area 003 of the solder ribbon end extends in the second direction.
[0064] In some embodiments, electrode structures with second auxiliary current collecting grid lines 123 and second current collecting grid line connection lines 124 are provided at two or four corners of the solar cell. Figure 1 and Figure 2 The improved grid line structure is provided at two diagonal corners. In other embodiments, similar structures can also be provided at all four corners, which are all within the protection scope of the present utility model.
[0065] The embodiment of the present utility model further provides a solar cell, including the electrode structure 100 of the solar cell provided by the embodiment of the present utility model, and may further include a silicon wafer. An antireflection layer and a surface passivation layer can be provided on the front surface of the silicon wafer, and a passivation layer and other structures can be formed on the back surface of the n-type silicon wafer to form a complete solar cell structure.
[0066] After testing, by improving the electrode structure at the edge, disconnecting the second current collecting grid lines at the ends in the second direction and on both sides of the first edge solder ribbon, the occurrence of short-circuit phenomena can be avoided; by connecting the disconnected second current collecting grid lines through the second auxiliary current collecting grid lines, and connecting the second auxiliary current collecting grid lines to the second current collecting grid line closest to them through the second current collecting grid line connection line, grid line bypassing is finally achieved. Compared with the prior art without disconnection and without setting the second auxiliary current collecting grid lines and the second current collecting grid line connection lines, the risk of short-circuit of the battery module is reduced by 20%.
[0067] The embodiment of the present utility model further provides a photovoltaic module, including the above solar cell, forming a battery string by using multiple such solar cells, and then assembling them into a photovoltaic module by using structures such as bus bars.
[0068] The above is only the specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model.
Claims
1. An electrode structure for a solar cell, characterized in that, It includes a plurality of first current collector lines, a plurality of second current collector lines, a first current bus line for connecting the plurality of first current collector lines, and a second current bus line for connecting the plurality of second current collector lines. The first current collector lines and the second current collector lines both extend along a first direction and are alternately distributed along a second direction intersecting the first direction. The first current bus line and the second current bus line both extend along the second direction and are alternately distributed along the first direction. The outermost edge in the first direction is a first edge busbar. Near the first edge busbar, a plurality of first edge interconnect nodes are arranged at intervals along the second direction. Each first edge interconnect node is connected to two or more first edge busbars. First edge solder strips are provided on the plurality of first edge interconnect nodes. The first edge interconnect nodes are connected to the first edge busbars through first edge busbar connecting lines. The electrode structure of the solar cell has a first end and a second end opposite to the first end in the second direction. The second current collector line near the second end and located on both sides of the first edge solder strip is disconnected. A second auxiliary current collector line is provided near the second end and located between the first edge current collector line and the first edge solder strip. The disconnected second current collector line is connected by the second auxiliary current collector line. The second auxiliary current collector line is connected to the adjacent second current collector line through a second current collector line connecting line.
2. The electrode structure of the solar cell according to claim 1, characterized in that, A first auxiliary busbar is provided between the first edge interconnect node and the second end, and the first auxiliary busbar is connected to the first collector busbar located between the first edge interconnect node and the second end.
3. The electrode structure of the solar cell according to claim 2, characterized in that, The first auxiliary bus gate is not connected to the first edge interconnect node. The width of the first auxiliary bus gate is D1, the width of the first collector gate is d1, and the width of the first bus gate is D3. D1, d1, and D3 satisfy d1≤D1≤D3.
4. The electrode structure of the solar cell according to claim 1, characterized in that, The second type of current collector line connection line has two or more wires, and the second type of current collector line connection line can be adjacent current collector lines or non-adjacent current collector lines.
5. The electrode structure of the solar cell according to claim 1, characterized in that, The width of the second auxiliary busbar is D2, the width of the second current collector is d2, and the width of the second busbar is D4. D2, d2, and D4 satisfy d2≤D2≤D4. And / or, the width of the second current collector line connection line is d, and the width of the second current collector line is d2, where d and d2 satisfy d2 ≤ d ≤ 3d2.
6. The electrode structure of the solar cell according to claim 1, characterized in that, The first edge solder strip extends from the first end; And / or, electrode structures with secondary auxiliary busbars and secondary current collector connecting lines are provided at two or four corners of the solar cell.
7. The electrode structure of the solar cell according to claim 1, characterized in that, Multiple first-type interconnect nodes are spaced apart on each of the first-type busbars except for the edge busbars. Each first-type interconnect node is connected to two or more first-type busbars. First-type solder strips extending along the second direction are provided on the multiple first-type interconnect nodes. Multiple second-type interconnect nodes are provided at intervals on the second-type busbars except for the edge busbars. Each second-type interconnect node is connected to more than two second-type busbars. Second-type solder strips extending along the second direction are provided on the multiple second-type interconnect nodes. The width of the first linear solder strip or the first linear edge solder strip is H1, the width of the first linear busbar is D3, the spacing width of the second linear busbar near the second end and located on both sides of the first linear edge solder strip is G2, and the width of the first linear interconnect node or the first linear edge interconnect node in the first direction is W. H1, D3, G2, and W satisfy: D3 ≤ H1 <G2<W。 8. The electrode structure of the solar cell according to claim 7, characterized in that, The first edge interconnect node, the first interconnect node, and the second interconnect node are all pads, and the first edge solder strip, the first solder strip, and the second solder strip are all solder strips.
9. A solar cell, characterized in that, The electrode structure of the solar cell is included in any one of claims 1-8.
10. A photovoltaic module, characterized in that, Includes the solar cell as described in claim 9.