Battery piece, battery string, photovoltaic module and photovoltaic power generation system

Abstract

The utility model discloses a battery piece, a battery string, a photovoltaic assembly and a photovoltaic power generation system. The battery piece comprises a battery piece body, a plurality of grid lines and at least one first reinforcing connecting piece. The plurality of grid lines are arranged on the surface of at least one side of the battery piece body, the first reinforcing connecting pieces are arranged on the sides, away from the battery piece body, of the grid lines, and the first reinforcing connecting pieces wrap the grid lines in the width direction of the grid lines. The plurality of grid lines are arranged on the surface of at least one side of the battery piece body, and the first reinforcing connecting piece completely covers the grid lines in the width direction of the grid lines, so that the contact area between the first reinforcing connecting piece and the grid lines is increased, the contact system of the battery piece can be optimized, the current on the grid lines can be conveniently collected, and the current on the grid lines can be conveniently led out; meanwhile, relative displacement between the grid lines and the battery piece is avoided, and the current transmission efficiency of the grid lines is improved, so that the working efficiency of the battery piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of solar cell technology, and in particular to a solar cell, a solar cell string, a photovoltaic module, and a photovoltaic power generation system. Background Technology

[0002] In the existing technology, the pad point size between the solder ribbon and the grid line in TOPCon cells is small, the current transmission efficiency of the grid line is low, and the working efficiency of the cell is low. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a battery cell that can improve the working efficiency of the battery cell.

[0004] The second objective of this invention is to provide a battery string comprising multiple battery cells and multiple interconnecting structural components, wherein the battery cells are any one of the battery cells described in the first aspect of the embodiments above.

[0005] The third objective of this invention is to provide a photovoltaic module comprising a cell according to any one of the embodiments of the first aspect above, or a cell string as described in the embodiments of the second aspect above.

[0006] The fourth objective of this utility model is to provide a photovoltaic power generation system, including the battery cell described in any one of the first aspect embodiments, the battery string described in the second aspect embodiments, or the photovoltaic module described in the third aspect embodiments.

[0007] According to a first aspect of the present invention, the battery cell includes: a battery cell body, a plurality of grid lines and at least one first reinforcing connector, wherein the plurality of grid lines are disposed on at least one side surface of the battery cell body, and the first reinforcing connector is disposed on the side of the grid lines away from the battery cell body, and the first reinforcing connector covers the grid lines in the width direction of the grid lines.

[0008] According to the embodiments of the present invention, the battery cell has multiple grid lines disposed on at least one side surface of the battery cell body, and the first reinforcing connector completely covers the grid lines in the width direction of the grid lines, thereby increasing the contact area between the first reinforcing connector and the grid lines. This can optimize the contact system of the battery cell, facilitate the collection of current on the grid lines, facilitate the output of current on the grid lines, and at the same time avoid relative displacement between the grid lines and the battery cell, improve the current transmission efficiency of the grid lines, and thus improve the working efficiency of the battery cell.

[0009] In some embodiments, at least one of the gate lines is a conductive polymer gate line.

[0010] In some embodiments, the gate line is a structural conductive polymer gate line; and / or, the gate line is a composite conductive polymer gate line.

[0011] In some embodiments, the grid lines are transparent.

[0012] In some embodiments, a groove is formed on at least one side surface of the battery cell body, and at least a portion of the grid lines are disposed within the groove.

[0013] In some embodiments, the width of the gate line is L, where L satisfies: 20μm≤L≤80μm.

[0014] In some embodiments, the first reinforcing connector includes: at least one first reinforcing member disposed at the end of the grid line, the length of the first reinforcing member in the length direction of the grid line being L1, wherein L1 satisfies: 2mm≤L1≤3mm; and / or, the width of the first reinforcing member in the width direction of the grid line being L2, wherein L2 satisfies: 1mm≤L2≤1.5mm.

[0015] In some embodiments, the first reinforcing connector includes: at least one second reinforcing member, the second reinforcing member being disposed between the two ends of the grid line in the length direction, the length of the second reinforcing member in the length direction of the grid line being L3, wherein L3 satisfies: 1mm≤L3≤1.5mm; and / or, the width of the second reinforcing member in the width direction of the grid line being L4, wherein L4 satisfies: 0.8mm≤L4≤1mm.

[0016] In some embodiments, the plurality of gate lines include: a plurality of first gate lines and a plurality of second gate lines, wherein the plurality of first gate lines are spaced apart along a first direction and all of the plurality of first gate lines extend along a second direction, the first direction and the second direction being perpendicular; the plurality of second gate lines are spaced apart along the second direction and all of the plurality of second gate lines extend along the first direction, the width of the second gate line is smaller than the width of the first gate line, and at least one of the second gate line and the first gate line is a conductive polymer gate line.

[0017] According to a second aspect embodiment of the present invention, the battery string includes: a plurality of battery cells and a plurality of interconnecting structures, wherein the battery cells are any one of the battery cells described in the first aspect embodiment; adjacent two battery cells are electrically connected through the interconnecting structures.

[0018] In some embodiments, the battery cell further includes at least one second reinforcing connector adapted to connect the battery cell and the corresponding interconnect structure.

[0019] A photovoltaic module according to a third aspect of the present invention includes the solar cells described in any one of the first aspect embodiments, or the solar strings described in the second aspect embodiments.

[0020] A photovoltaic power generation system according to a fourth aspect embodiment of the present invention includes the battery cell described in any one of the first aspect embodiments, the battery string described in the second aspect embodiment, or the photovoltaic module described in the third aspect embodiment.

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

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a cross-sectional view of the location where the first reinforcing connector is provided according to an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional view of the part where the first reinforcing connector is not provided in the embodiment of this utility model.

[0025] Figure label:

[0026] 100. Battery cells;

[0027] 10. Battery cell body;

[0028] 20. Grid lines;

[0029] 30. First reinforcing connector;

[0030] 40. Interconnection structural components. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figures 1-2 The battery cell 100 according to an embodiment of the present utility model includes: a battery cell body 10, a plurality of grid lines 20 and at least one first reinforcing connector 30.

[0032] Specifically, such as Figure 1 As shown, a plurality of grid lines 20 are disposed on at least one side surface of the cell body 10, and a first reinforcing connector 30 is disposed on the side of the grid lines 20 away from the cell body 10, and the first reinforcing connector 30 completely covers the grid lines 20 in the width direction of the grid lines 20.

[0033] That is, multiple grid lines 20 are disposed along the thickness direction of the cell body 10 on at least one side surface of the cell body 10. The grid lines 20 are suitable for collecting and transmitting photogenerated carriers, thereby converting solar energy into electrical energy. A first reinforcing connector 30 is disposed along the thickness direction of the cell body 10 on the side of the grid lines 20 away from the cell body 10, and the first reinforcing connector 30 completely covers the grid lines 20 along the width direction of the grid lines 20. The first reinforcing connector 30 is suitable for increasing the conductivity of the grid lines 20 and improving the structural strength of the grid lines 20. In this embodiment, the first reinforcing connector 30 is a pad point and can be made of pure silver paste.

[0034] According to the embodiment of the present invention, the battery cell 100 has multiple grid lines 20 disposed on at least one side surface of the battery cell body 10, and the first reinforcing connector 30 completely covers the grid lines 20 in the width direction, which increases the contact area between the first reinforcing connector 30 and the grid lines 20. This can optimize the contact system of the battery cell 100, facilitate the collection of current on the grid lines 20, facilitate the output of current on the grid lines 20, and at the same time avoid relative displacement between the grid lines 20 and the battery cell 100, improve the current transmission efficiency of the grid lines 20, and thus improve the working efficiency of the battery cell 100.

[0035] According to some embodiments of the present invention, at least one gate line 20 is a conductive polymer gate line.

[0036] That is, at least one grid line 20 uses a conductive polymer paste. Conductive polymers have good mechanical stability and flexibility, while also being low in cost and simple to process. Therefore, by using at least one grid line 20 as a conductive polymer grid line, and replacing the traditional pure silver paste with a conductive polymer paste, the production cost of the solar cell 100 can be effectively reduced. At the same time, the processing technology of conductive polymer grid lines is simpler, which can improve the processing efficiency of the grid line 20, thereby improving the processing efficiency of the solar cell 100.

[0037] According to some embodiments of the present invention, the gate line 20 is a conductive polymer gate line structure type conductive polymer gate line; or, the gate line 20 is a conductive polymer gate line composite type conductive polymer gate line; or, some gate lines 20 are conductive polymer gate line structure type conductive polymer gate lines, and some gate lines 20 are conductive polymer gate line composite type conductive polymer gate lines.

[0038] For example, grid line 20 is a conductive polymer grid line. The conductive polymer grid line is a structural conductive polymer grid line, that is, the conductive polymer slurry is a structural conductive polymer material. Structural conductive polymer materials are generally made by doping a highly delocalized conjugated polymer with appropriate electron acceptors or donors. Among them, the conjugated polymer can be polyacetylene, polypyrrole, polythiophene, polyaniline, etc., the electron acceptor can be halogen, AsF5, PF5, and the donor can be alkali metals such as Li, Na, K, etc.

[0039] Optionally, the grid line 20 can also be a conductive polymer grid line or a composite conductive polymer grid line. That is, the conductive polymer slurry can be a composite conductive polymer material. The composite conductive polymer material is composed of a polymer matrix and a considerable amount of conductive substances. The polymer can be polyethylene, polypropylene, polystyrene, epoxy resin, or phenolic resin, and the conductive substances can be carbon black, carbon nanotubes, graphene, metals, or metal oxides.

[0040] In this embodiment, the conductivity and work function of the grid line 20 can be adjusted by changing the doping level of the polymer to better match the structure of the cell 100, thereby optimizing the collection and transport of charge carriers.

[0041] Therefore, the grid line 20 is a conductive polymer grid line structure type conductive polymer grid line; or, the grid line 20 is a conductive polymer grid line composite type conductive polymer grid line; or, some grid lines 20 are conductive polymer grid line structure type conductive polymer grid lines, and some grid lines 20 are conductive polymer grid line composite type conductive polymer grid lines. This can improve the mechanical stability and conductivity of the grid line 20, avoid stress concentration during the connection between the grid line 20 and the battery cell 100, improve the structural strength of the grid line 20, extend the service life of the grid line 20, and at the same time, improve the working efficiency of the battery cell 100, and improve the stability and reliability of the battery cell 100.

[0042] According to some embodiments of this utility model, the grid line 20 is a transparent part.

[0043] In this embodiment, the conductive polymer grid line is a transparent part, that is, the conductive polymer grid line has a high light transmittance, which can reduce the shading area of ​​the grid line 20 on the cell body 10, reduce the light loss caused by the shading of the cell body 10, and thus improve the photoelectric conversion efficiency of the cell 100.

[0044] According to some embodiments of the present invention, at least one side surface of the battery cell body 10 is formed with a groove, and at least a portion of the grid line 20 is disposed in the groove.

[0045] That is, at least one side surface of the cell body 10 is etched according to the grid design of the grid line 20 to form a groove, and a conductive polymer paste is sprayed onto the groove so that some of the conductive polymer grid lines fit into the groove.

[0046] Therefore, a groove is formed on at least one side surface of the cell body 10, and at least a portion of the grid line 20 is disposed in the groove. This can increase the contact area between the conductive polymer grid line and the cell body 10, thereby increasing the connection strength between the conductive polymer grid line and the cell body 10, preventing relative displacement between the conductive polymer grid line and the cell body 10, improving the photoelectric conversion efficiency of the cell 100, and simultaneously improving the structural strength and reliability of the cell 100.

[0047] According to some embodiments of the present invention, the width of the gate line 20 is L, and L satisfies: 20μm≤L≤80μm.

[0048] When the width of the grid line 20 is less than 20 μm, the width of the grid line 20 is too small, which may lead to an increase in the resistance of the grid line 20, and at the same time, the structural strength of the grid line 20 is low. When the width of the grid line 20 is greater than 80 μm, the width of the grid line 20 is too large, which may lead to a reduction in the number of grid lines 20 on the cell body 10, and at the same time increase the production cost. For example, L=50 μm.

[0049] Therefore, by limiting the width range of the grid line 20, the current transmission capacity of the grid line 20 can be maximized, while the structural strength of the grid line 20 can be improved, preventing the grid line 20 from breaking, extending the service life of the solar cell 100, improving the reliability of the solar cell 100, and reducing the production cost of the solar cell 100.

[0050] According to some embodiments of the present invention, the first reinforcing connector 30 includes: at least one first reinforcing member, the first reinforcing member being disposed at the end of the grid line 20, the length of the first reinforcing member in the length direction of the grid line 20 being L1, L1 satisfying: 2mm≤L1≤3mm; or, the width of the first reinforcing member in the width direction of the grid line 20 being L2, L2 satisfying: 1mm≤L2≤1.5mm, or, L1 satisfying: 2mm≤L1≤3mm, while L2 satisfies: 1mm≤L2≤1.5mm.

[0051] In this embodiment, the first reinforcing members are respectively disposed at both ends of the grid line 20 along its length. When the length of the first reinforcing member in the length direction of the grid line 20 is less than 2mm, the length of the first reinforcing member in the length direction of the grid line 20 is too small, which may result in an insufficient contact area between the first reinforcing member and the grid line 20, making it easy for the grid line 20 and the battery cell 100 to shift relative to each other. When the length of the first reinforcing member in the length direction of the grid line 20 is greater than 3mm, the length of the first reinforcing member in the length direction of the grid line 20 is too large, which may increase the cost of the first reinforcing member. For example, L1 = 2.5mm.

[0052] Optionally, if the width of the first reinforcing member in the width direction of the grid line 20 is less than 1 mm, the width of the first reinforcing member in the width direction of the grid line 20 is too small, which may also lead to an insufficient contact area between the first reinforcing member and the grid line 20, making it easy for the grid line 20 and the battery cell 100 to shift relative to each other. If the width of the first reinforcing member in the width direction of the grid line 20 is greater than 1.5 mm, the width of the first reinforcing member in the width direction of the grid line 20 is too large, which may increase the cost of the first reinforcing member. For example, L2 = 1 mm.

[0053] Therefore, by limiting the length range of the first reinforcing member in the length direction of the grid line 20 and the width range of the first reinforcing member in the width direction of the grid line 20, the contact area between the grid line 20 and the first reinforcing member is maximized, thereby improving the collection and transport efficiency of charge carriers, improving the photoelectric conversion efficiency of the solar cell 100, and reducing the production cost of the solar cell 100.

[0054] According to some embodiments of the present invention, the first reinforcing connector 30 includes at least one second reinforcing member, which is disposed between the two ends of the grid line 20 in the length direction. The length of the second reinforcing member in the length direction of the grid line 20 is L3, and L3 satisfies: 1mm≤L3≤1.5mm; or, the width of the second reinforcing member in the width direction of the grid line 20 is L4, and L4 satisfies: 0.8mm≤L4≤1mm; or, L3 satisfies: 1mm≤L3≤1.5mm, and L4 satisfies: 0.8mm≤L4≤1mm.

[0055] That is, the second reinforcing member is disposed between the first reinforcing members at both ends of the grid line 20 along its length. When the length of the second reinforcing member in the grid line 20 is less than 1 mm, the length of the second reinforcing member in the grid line 20 is too small, which may result in an insufficient contact area between the second reinforcing member and the grid line 20, making it easy for the grid line 20 and the battery cell 100 to shift relative to each other. When the length of the second reinforcing member in the grid line 20 is greater than 1.5 mm, the length of the second reinforcing member in the grid line 20 is too large, which may increase the cost of the second reinforcing member. For example, L3 = 1 mm.

[0056] Optionally, if the width of the second reinforcing member in the width direction of the grid line 20 is less than 0.8 mm, the width of the second reinforcing member in the width direction of the grid line 20 is too small, which may also lead to an insufficient contact area between the second reinforcing member and the grid line 20, making it easy for the grid line 20 and the battery cell 100 to shift relative to each other. If the width of the second reinforcing member in the width direction of the grid line 20 is greater than 1 mm, the width of the second reinforcing member in the width direction of the grid line 20 is too large, which may increase the cost of the second reinforcing member. For example, L4 = 1 mm.

[0057] Therefore, by limiting the length range of the second reinforcing member in the length direction of the grid line 20 and the width range of the second reinforcing member in the width direction of the grid line 20, the contact area between the grid line 20 and the second reinforcing member is maximized, while the connection strength between the grid line 20 and the first reinforcing connector 30 is further improved, the collection and transmission efficiency of charge carriers on the grid line 20 is improved, the photoelectric conversion efficiency of the solar cell 100 is improved, and the production cost of the solar cell 100 is reduced.

[0058] According to some embodiments of the present invention, the plurality of gate lines 20 include: a plurality of first gate lines and a plurality of second gate lines, wherein the plurality of first gate lines are arranged at intervals along a first direction and all of the plurality of first gate lines extend along a second direction, and the first direction and the second direction are perpendicular; the plurality of second gate lines are arranged at intervals along the second direction and all of the plurality of second gate lines extend along the first direction, the width of the second gate lines is smaller than the width of the first gate lines, and at least one of the second gate lines and the first gate lines is a conductive polymer gate line.

[0059] In this embodiment, a plurality of first gate lines are main gates, the plurality of first gate lines are arranged at intervals along a first direction, and the plurality of first gate lines extend along a second direction; a plurality of second gate lines are fine gates, the plurality of second gate lines are arranged at intervals along a second direction, and the plurality of second gate lines extend along a first direction, and both the first gate lines and the second gate lines are conductive polymer gate lines.

[0060] Therefore, the width of the second grid line is smaller than the width of the first grid line, and at least one of the second grid line and the first grid line is a conductive polymer grid line, which can significantly reduce the shading area of ​​the first grid line and the second grid line on the cell body 10, improve the photoelectric conversion efficiency of the cell 100, and at the same time reduce the production cost of the first grid line and the second grid line.

[0061] According to the second aspect of the present invention, the battery string, such as Figure 1 As shown, the battery string includes: a plurality of battery cells 100 and a plurality of interconnecting structures 40, wherein the battery cells 100 are any of the battery cells 100 in the first aspect embodiment described above; adjacent two battery cells 100 are electrically connected through the interconnecting structures 40.

[0062] That is, multiple interconnecting structures 40 extend along the second direction and are disposed on the side of the grid line 20 away from the battery cell 100 along the thickness direction of the battery cell body 10. The multiple interconnecting structures 40 are adapted to electrically connect two adjacent battery cells 100. In this embodiment, the interconnecting structures 40 may be solder strips.

[0063] Thus, two adjacent battery cells 100 are electrically connected through the interconnection structure 40 to form a battery string. Part of the current collected on the grid lines 20 of the two adjacent battery strings is transmitted to the interconnection structure 40 through the first reinforcing connector 30, which can improve the current collection efficiency, improve the working efficiency of the battery string, and improve the reliability of the battery string.

[0064] According to some embodiments of this utility model, such as Figure 1 As shown, the battery cell 100 further includes at least one second reinforcing connector adapted to connect the battery cell 100 and the corresponding interconnect structure 40.

[0065] That is, the second reinforcing connector is disposed along the thickness direction of the cell body 10 on the side of the grid line 20 away from the cell 100, and the second reinforcing connector covers the grid line 20 and the interconnecting structure 40 along the thickness direction of the cell body 10. In this embodiment, there are multiple second reinforcing connectors, which are spaced apart between the two ends of the grid line 20 along its length direction, and the second reinforcing connectors can be adhesive dots.

[0066] Therefore, the second reinforcing connector is suitable for connecting the battery cell 100 and the corresponding interconnect structure 40, which can improve the efficiency of current transmission to the interconnect structure 40 at the location on the grid line 20 where the first reinforcing connector 30 is not provided, effectively improving the current transmission efficiency on the grid line 20, thereby improving the current conversion efficiency and reliability of the battery cell 100.

[0067] A photovoltaic module according to a third aspect of the present invention includes a cell 100 of any one of the first aspect embodiments described above, or a cell string of the second aspect embodiments described above.

[0068] In this embodiment, by forming conductive polymer grid lines on multiple solar cells 100, providing multiple first reinforcing connectors 30 between the conductive polymer grid lines and the interconnecting structure 40, and providing multiple second reinforcing connectors to cover the grid lines 20 and the interconnecting structure 40, and connecting adjacent solar cells 100 to form a solar cell string through the multiple interconnecting structure 40, the photoelectric conversion efficiency of the photovoltaic module can be effectively improved, while the reliability of the photovoltaic module can be improved and the production cost of the photovoltaic module can be reduced.

[0069] A photovoltaic power generation system according to a fourth aspect embodiment of the present invention includes a solar cell 100 of any one of the first aspect embodiments, a solar cell string of the second aspect embodiment, or a photovoltaic module of the third aspect embodiment.

[0070] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0071] In the description of this utility model, "first feature" and "second feature" may include one or more of the features. In the description of this utility model, "multiple" means two or more. In the description of this utility model, "above" or "below" the second feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A type of battery cell, characterized in that, include: The battery cell itself; Multiple grid lines are disposed on at least one side surface of the battery cell body, at least one of the grid lines is a conductive polymer grid line, and the grid line is a transparent element; At least one first reinforcing connector is disposed on the side of the grid line away from the cell body, and the first reinforcing connector covers the grid line in the width direction of the grid line.

2. The battery cell according to claim 1, characterized in that, The gate line is a structural conductive polymer gate line; and / or The gate line is a composite conductive polymer gate line.

3. The battery cell according to claim 1, characterized in that, A groove is formed on at least one side surface of the battery cell body, and at least a portion of the grid lines are disposed within the groove.

4. The battery cell according to claim 1, characterized in that, The width of the gate line is L, and L satisfies: 20μm≤L≤80μm.

5. The battery cell according to claim 1, characterized in that, The first reinforcing connector includes: At least one first reinforcing member is provided at the end of the grid line. The length of the first reinforcing member in the direction of the grid line is L1, wherein L1 satisfies: 2mm ≤ L1 ≤ 3mm; and / or, The width of the first reinforcing member in the width direction of the grid line is L2, and L2 satisfies: 1mm≤L2≤1.5mm.

6. The battery cell according to claim 1, characterized in that, The first reinforcing connector includes: At least one second reinforcing member is disposed between the two ends of the grid line along its length. The second reinforcing member has a length L3 in the direction of the grid line length, wherein L3 satisfies: 1mm ≤ L3 ≤ 1.5mm; and / or, The width of the second reinforcing member in the direction of the grid line width is L4, and L4 satisfies: 0.8mm≤L4≤1mm.

7. The battery cell according to any one of claims 1-6, characterized in that, The plurality of said gate lines include: A plurality of first grid lines are arranged at intervals along a first direction, and all of the plurality of first grid lines extend along a second direction, wherein the first direction and the second direction are perpendicular to each other. Multiple second gate lines are arranged at intervals along the second direction, and all of the multiple second gate lines extend along the first direction. The width of the second gate line is smaller than the width of the first gate line, and at least one of the second gate line and the first gate line is a conductive polymer gate line.

8. A battery string, characterized in that, include: A plurality of solar cells, wherein the solar cells are solar cells according to any one of claims 1-7; Multiple interconnecting structural components, with adjacent two of the battery cells electrically connected through the interconnecting structural components.

9. The battery string according to claim 8, characterized in that, Also includes: At least one second reinforcing connector, the second reinforcing connector being adapted to connect the battery cell and the corresponding interconnect structure.

10. A photovoltaic module, characterized in that, Includes the battery cell according to any one of claims 1-7, or the battery string according to claim 8 or 9.

11. A photovoltaic power generation system, characterized in that, It includes the solar cell according to any one of claims 1-7, or the solar string according to claim 8 or 9, or the photovoltaic module according to claim 10.

Images