Solar cell and photovoltaic module

Abstract

The utility model discloses a solar cell and a photovoltaic module, and belongs to the technical field of solar cells. The solar cell comprises at least one cell module, the cell module comprises a plurality of sub-cells arranged along a first direction, the plurality of sub-cells arranged along the first direction are sequentially connected in series, two adjacent sub-cells are connected with each other through the first side edges of the sub-cells, and the first side edges of the sub-cells are connected with the second side edges of the sub-cells. The first side edge is arranged along a second direction intersected with the first direction, and the first side edge is arc-shaped. According to the solar cell, the first side edges of the adjacent positions of the sub-cells connected in series are arc-shaped, so that the series resistance between the sub-cells is effectively reduced, the solar cell is suitable for cell modules in different shapes, the use requirements of the solar cell in different scenes can be met, and the space utilization rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of solar cells, and in particular to a solar cell and a photovoltaic module. Background Art

[0002] Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. The battery module is composed of multiple sub-cells connected in series or in parallel to form a rectangular array. The modules and sub-cells are usually rectangular structures, which limits the use of solar cells in circular, elliptical and other special-shaped scenes, and cannot meet diverse usage needs. The space utilization rate is low, and the series resistance between sub-cells is relatively large, which affects the overall photoelectric conversion efficiency of the module. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a solar cell and a photovoltaic module that can meet the use requirements of different scenarios, effectively reduce the series resistance between sub-cells, and have high space utilization.

[0004] In a first aspect, the present application provides a solar cell, comprising:

[0005] At least one battery module, the battery module comprising a plurality of sub-batteries arranged along a first direction, the plurality of sub-batteries arranged along the first direction being connected in series in sequence, two adjacent sub-batteries being connected to each other via a first side edge of the sub-battery, the first side edge being arranged along a second direction intersecting the first direction and the first side edge being arc-shaped.

[0006] According to the solar cell of the present application, by setting the first side of the adjacent position of the series-connected sub-cells to an arc shape, the series resistance between the sub-cells is effectively reduced. It is suitable for battery modules of different shapes, can meet the different scene usage requirements of the solar cell, and has high space utilization.

[0007] According to an embodiment of the present application, shapes of the first side edges of two adjacent sub-batteries match each other.

[0008] According to an embodiment of the present application, two first side edges arranged opposite to each other on the sub-cell are both concave arcs or both convex arcs.

[0009] According to an embodiment of the present application, two first side edges arranged opposite to each other on the sub-battery are concave arcs on one side and convex arcs on the other side.

[0010] According to an embodiment of the present application, the sub-battery further includes a second side edge arranged along the first direction, and the second side edge is a straight line.

[0011] According to an embodiment of the present application, the photoelectric conversion area of ​​each of the sub-cells in the battery module is the same.

[0012] According to an embodiment of the present application, the solar cell includes a plurality of the battery modules, and the plurality of the battery modules are connected in series or in parallel.

[0013] According to one embodiment of the present application, the solar cell is a perovskite solar cell, a silicon-based solar cell or an organic solar cell.

[0014] According to an embodiment of the present application, the solar cell has an arc-shaped edge, and the third side of the sub-cell located at the arc-shaped edge close to the arc-shaped edge is arc-shaped.

[0015] In a second aspect, the present application provides a photovoltaic assembly, the photovoltaic assembly comprising:

[0016] At least one solar cell as described in the first aspect above.

[0017] According to the photovoltaic module of the present application, by setting the first side of the adjacent position of the series-connected sub-cells to an arc shape, the series resistance between the sub-cells is effectively reduced. It is suitable for battery modules of different shapes, can meet the different scene usage requirements of solar cells, and has high space utilization.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is one of the structural schematic diagrams of the battery module of the solar cell provided in the embodiment of the present application;

[0021] Figure 2 It is one of the structural schematic diagrams of the sub-battery of the battery module provided in the embodiment of the present application;

[0022] Figure 3 This is the second structural schematic diagram of the sub-battery of the battery module provided in the embodiment of the present application;

[0023] Figure 4 This is the second structural schematic diagram of the battery module of the solar cell provided in the embodiment of the present application;

[0024] Figure 5 This is the third structural schematic diagram of the battery module of the solar cell provided in the embodiment of the present application.

[0025] Reference numerals:

[0026] Battery module 100 , sub-battery 110 , first side 111 , second side 112 . DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] The embodiments of the present application provide a solar cell and a photovoltaic module including the solar cell, which can meet the use requirements of different scenarios, have high space utilization, and effectively reduce the series resistance between sub-cells 110.

[0029] Reference below Figure 1-Figure 5 A solar cell according to an embodiment of the present application is described.

[0030] The solar cell of the embodiment of the present application includes at least one battery module 100 . The battery module 100 includes a plurality of sub-batteries 110 arranged along a first direction. The plurality of sub-batteries 110 arranged along the first direction are sequentially connected in series.

[0031] In this embodiment, the solar cell includes one or more battery modules 100 , each of which includes a plurality of sub-batteries 110 connected in series. The plurality of sub-batteries 110 connected in series can increase the output voltage of the battery module 100 .

[0032] In the battery module 100 , the sub-cells 110 are arranged along a first direction, and two adjacent sub-cells 110 are connected to each other via first sides 111 of the sub-cells 110 .

[0033] It can be understood that each of the two adjacent sub-batteries 110 has a first side edge 111 , and the two first side edges 111 are located close to and connected to each other.

[0034] In this embodiment, the first side edge 111 is disposed along a second direction intersecting the first direction and the first side edge 111 is arc-shaped.

[0035] For example, Figure 1 As shown, the battery module 100 includes a plurality of sub-batteries 110 , which are arranged along a first direction D1 , and two adjacent sub-batteries 110 are connected to each other via a first side 111 along a second direction D2 , thereby realizing series connection of the plurality of sub-batteries 110 in the battery module 100 .

[0036] In actual implementation, the first direction and the second direction are two intersecting directions, and the first direction and the second direction may be perpendicular to each other.

[0037] It can be understood that two adjacent sub-batteries 110 are connected to each other through the first side edges 111 along the second direction, and two adjacent first side edges 111 of the two adjacent sub-batteries 110 form adjacent positions along the second direction.

[0038] In this embodiment, if Figure 2 He Ru Figure 3 As shown, the first side edges 111 of the adjacent sub-batteries 110 along the second direction are arc-shaped, and two adjacent sub-batteries 110 are connected to each other through the arc-shaped first side edges 111 to form a series connection relationship between the sub-batteries 110 .

[0039] It should be noted that the series resistance between the sub-batteries 110 can be calculated by the formula R=ρL / S, wherein R is the series resistance, ρ is the resistivity, L is the current flow length, S is the contact area between the sub-batteries 110, S=l*w, l is the line length of the contact edge between the sub-batteries 110, and w is the line width of the contact edge between the sub-batteries 110.

[0040] Among them, resistivity is related to the characteristics of battery materials.

[0041] In this embodiment, a plurality of sub-batteries 110 are arranged along a first direction, and two adjacent sub-batteries 110 are connected to each other through a first side edge 111 along a second direction. The current of the battery module 100 flows in the first direction. The first side edge 111 along the second direction on the sub-battery 110 is a contact edge between the sub-batteries 110. The first side edge 111 of the adjacent sub-battery 110 along the second direction is set to an arc shape. In the formula R=ρL / S=ρL / l*w, as l increases, the number of series electrons between the sub-batteries 110 decreases.

[0042] In the embodiment of the present application, the adjacent positions of two adjacent sub-batteries 110 are set to an arc shape along the first side 111 of the second direction, which can be matched with battery modules 100 of different shapes to meet the use requirements of solar cells in different scenarios and effectively improve space utilization.

[0043] For example, Figure 1 As shown, the battery module 100 with arc-shaped edges includes a plurality of sub-batteries 110, and the plurality of sub-batteries 110 are arranged along a first direction D1, and two adjacent sub-batteries 110 are connected to each other through a first side edge 111 along a second direction D2, and the first side edge 111 of the adjacent sub-batteries 110 along the second direction D2 is arc-shaped.

[0044] For example, Figure 4As shown, the fan-shaped battery module 100 includes a plurality of sub-batteries 110, and the plurality of sub-batteries 110 are arranged along a first direction D1, and two adjacent sub-batteries 110 are connected to each other through a first side edge 111 along a second direction D2, and the first side edge 111 of the adjacent sub-batteries 110 along the second direction D2 is arc-shaped.

[0045] In this embodiment, the first side 111 of the leftmost sub-cell 110 adjacent to another adjacent sub-cell 110 along the second direction D2 is set to be an arc shape, and the other side edges of the leftmost sub-cell 110 can be set to be an arc shape or other shapes.

[0046] For example, Figure 5 As shown, the battery module 100 with arc-shaped edges includes a plurality of sub-batteries 110, and the plurality of sub-batteries 110 are arranged along a first direction D1, and two adjacent sub-batteries 110 are connected to each other through a first side edge 111 along a second direction D2, and the first side edge 111 of the adjacent sub-batteries 110 along the second direction D2 is arc-shaped.

[0047] The solar cell of the embodiment of the present application includes a plurality of sub-cells 110 arranged along a first direction, and two adjacent sub-cells 110 are connected to each other via a first side edge 111 along a second direction. The first side edge 111 of the adjacent sub-cells 110 along the second direction is set to an arc shape, which effectively reduces the series resistance between the sub-cells 110 while meeting the requirements of use in different scenarios, and sets the battery module 100 to different shapes, thereby improving the space utilization of the battery module 100.

[0048] In actual implementation, the arc shape of the first side 111 of the sub-cell 110 can be obtained by drawing a line, that is, the sub-cell 110 is divided by an arc line, and the arc shape of the first side 111 is set according to the application scenario of the battery module 100 or the solar cell to make full use of the space.

[0049] According to the solar cell provided in the embodiment of the present application, by setting the first side 111 of the adjacent position of the series-connected sub-cells 110 to an arc shape, the series resistance between the sub-cells 110 is effectively reduced. It is suitable for battery modules 100 of different shapes, can meet the different scene usage requirements of the solar cell, and has high space utilization.

[0050] In some embodiments, the shapes of the first sides 111 of two adjacent sub-cells 110 match each other.

[0051] In this embodiment, the first side edges 111 at adjacent positions having shapes matching each other can make the arrangement of adjacent sub-batteries 110 more compact, thereby improving space utilization.

[0052] In actual implementation, the shapes of the first side edges 111 of two adjacent sub-batteries 110 adjacent to each other along the second direction can match each other, and the concave and convex characteristics of the first side edges 111 can match each other. The two first side edges 111 of two adjacent sub-batteries 110 at adjacent positions can be set to a concave arc on one side and a convex arc on the other side, that is, the concave arc is located on one sub-battery 110 and the convex arc is located on the other sub-battery 110.

[0053] For example, Figure 1 As shown, the battery module 100 having an arc-shaped edge includes a plurality of sub-cells 110 , and the plurality of sub-cells 110 are arranged along a first direction D1 .

[0054] From left to right, the concave-convex characteristics of the first side edges 111 adjacent to the first sub-cell 110 and the second sub-cell 110 along the second direction D2 match each other, the first side edge 111 on the right side of the first sub-cell 110 is a convex arc, and the first side edge 111 on the left side of the second sub-cell 110 is a concave arc, and the concave-convex characteristics of the first side edges 111 adjacent to the second sub-cell 110 and the third sub-cell 110 along the second direction D2 match each other, the first side edge 111 on the right side of the second sub-cell 110 is a concave arc, and the first side edge 111 on the left side of the third sub-cell 110 is a convex arc, the convex arc and the concave arc match each other, and the spatial positions of the multiple sub-cells 110 are compact.

[0055] For example, Figure 4 As shown, the fan-shaped battery module 100 includes a plurality of sub-cells 110 , and the plurality of sub-cells 110 are arranged along a first direction D1 .

[0056] From left to right, the concave-convex characteristics of the first side edges 111 adjacent to the first sub-cell 110 and the second sub-cell 110 along the second direction D2 match each other, the first side edge 111 on the right side of the first sub-cell 110 is a convex arc, and the first side edge 111 on the left side of the second sub-cell 110 is a concave arc, and the concave-convex characteristics of the first side edges 111 adjacent to the second sub-cell 110 and the third sub-cell 110 along the second direction D2 match each other, the first side edge 111 on the right side of the second sub-cell 110 is a convex arc, and the first side edge 111 on the left side of the third sub-cell 110 is a concave arc, the convex arc and the concave arc match each other, and the spatial positions of the multiple sub-cells 110 are compact.

[0057] In some embodiments, two first side edges 111 of the sub-battery 110 that are opposite to each other are both concave arcs or both are convex arcs.

[0058] In this embodiment, the sub-battery 110 has two first side edges 111 arranged opposite to each other, and the concave-convex characteristics of the two first side edges 111 can be consistent. The two first side edges 111 of the sub-battery 110 along the second direction can both be concave arcs, or the two first side edges 111 of the sub-battery 110 along the second direction can both be convex arcs.

[0059] For example, Figure 1 As shown, the battery module 100 includes a plurality of sub-batteries 110 , and the two first sides 111 of the sub-batteries 110 along the second direction have consistent concave-convex characteristics. The plurality of sub-batteries 110 of the battery module 100 are divided into two categories.

[0060] like Figure 2 As shown, two first side edges 111 of a type of sub-battery 110 along the second direction are configured as concave arcs, such as Figure 3 As shown, another type of sub-battery 110 is configured as convex arcs along two first side edges 111 in the second direction. The two types of sub-batteries 110 are arranged at intervals along the first direction D1 from left to right. The convex arcs and the concave arcs match each other, and the spatial positions of the multiple sub-batteries 110 are compact.

[0061] In some embodiments, two first side edges 111 of the sub-cell 110 are oppositely disposed, one of which is a concave arc and the other of which is a convex arc.

[0062] In this embodiment, the sub-cell 110 has two first side edges 111 arranged opposite to each other. The two first side edges 111 have different concave-convex characteristics. One first side edge 111 of the sub-cell 110 along the second direction is set as a concave arc, and the other first side edge 111 is set as a convex arc.

[0063] For example, Figure 4 As shown, the fan-shaped battery module 100 includes a plurality of sub-cells 110. Starting from the second sub-cell 110, the two first side edges 111 of each sub-cell 110 along the second direction have different concave-convex characteristics. The first side edge 111 on the left side of the sub-cell 110 is set to a concave arc, and the first side edge 111 on the right side is set to a convex arc.

[0064] It can be understood that in the battery module 100, multiple sub-batteries 110 are arranged along the first direction, two adjacent sub-batteries 110 are connected to each other through the first side 111 in the second direction, different sub-batteries 110 have no connection relationship along the second side 112 in the first direction, and the shape of the second side 112 of the sub-battery 110 along the first direction does not affect the series resistance between the sub-batteries 110. The second side 112 of the sub-battery 110 along the first direction can be set to a straight line or other special shapes such as an arc or a wave.

[0065] It should be noted that the sub-battery 110 of the battery module 100 is not circular, and can be adapted to a circular battery module 100 by setting the side shapes of the sub-battery 110 along the first direction and the second direction.

[0066] In some embodiments, the sub-battery 110 further includes a second side 112 disposed along the first direction, and the second side 112 is a straight line.

[0067] In this embodiment, the straight line design of the second side 112 can indicate the direction of current between the sub-cells 110 in the battery module 100 , and is suitable for different solar cell application scenarios.

[0068] For example, Figure 1 As shown, the battery module 100 includes a plurality of sub-batteries 110. The plurality of sub-batteries 110 of the battery module 100 are divided into two categories, such as Figure 2 As shown, two first side edges 111 of a type of sub-battery 110 along the second direction are set as concave arcs, and the second side edges 112 along the first direction are straight lines; Figure 3 As shown, the two first side edges 111 of another type of sub-battery 110 along the second direction are configured as convex arcs, and the second side edges 112 along the first direction are configured as straight lines.

[0069] In this embodiment, the two types of sub-batteries 110 are arranged at intervals along a first direction D1 from left to right, so as to form a special-shaped battery module 100 that is straight in the vertical direction and arc-shaped in the horizontal direction.

[0070] In some embodiments, the photoelectric conversion regions of each sub-cell 110 in the battery module 100 are the same in area.

[0071] In this embodiment, the battery module 100 is composed of a plurality of sub-batteries 110 connected in series, and the photoelectric conversion area of ​​each sub-battery 110 can be set to the same area, so that the photoelectric conversion effect of the photoelectric conversion area of ​​each sub-battery 110 is consistent, and each sub-battery 110 has the same output characteristics, thereby improving the stability of the battery module 100.

[0072] It can be understood that the photoelectric conversion area of ​​each sub-cell 110 in the battery module 100 is the same, and the shapes of two adjacent sub-cells 110 may be different.

[0073] For example, Figure 1 As shown, the battery module 100 includes a plurality of sub-cells 110 . The photoelectric conversion area of ​​each sub-cell 110 in the battery module 100 is the same. The plurality of sub-cells 110 in the battery module 100 are divided into two categories.

[0074] like Figure 2 As shown, a type of sub-battery 110 has two first side edges 111 along the second direction set as concave arcs, which can be called a concave sub-battery 110. Figure 3 As shown, another type of sub-cell 110 is configured with two first side edges 111 along the second direction as convex arcs, which may be referred to as a convex sub-cell 110 .

[0075] The two types of sub-cells 110 are arranged at intervals along the first direction D1 from left to right, the convex arcs and the concave arcs match each other, the length of the second side 112 of the convex sub-cell 110 is less than the length of the second side 112 of the concave sub-cell 110, the photoelectric conversion area of ​​the convex sub-cell 110 and the concave sub-cell 110 is the same, and the output characteristics of the sub-cell 110 remain consistent.

[0076] In some embodiments, the solar cell includes a plurality of battery modules 100 , and the plurality of battery modules 100 are connected in series.

[0077] In this embodiment, multiple battery modules 100 connected in series can effectively increase the voltage of the solar cell. The sub-cell 110 with the arc-shaped first side 111 in the battery module 100 can reduce the series resistance between the sub-cells 110, so that the solar cell can increase the battery voltage when the series resistance is small.

[0078] In some embodiments, the solar cell includes a plurality of battery modules 100 , and the plurality of battery modules 100 are connected in parallel.

[0079] In this embodiment, multiple battery modules 100 are connected in parallel to increase the current of the solar cell. The sub-cell 110 with the arc-shaped first side 111 in the battery module 100 can reduce the series resistance between the sub-cells 110, so that the total output power of the solar cell is improved when the series resistance in the module is small.

[0080] In some embodiments, the solar cell includes a plurality of battery modules 100 , and the connection modes of the plurality of battery modules 100 may include parallel connection and series connection to meet different output requirements of the solar cell.

[0081] For example, the solar cell includes 15 battery modules 100, and five battery modules 100 can be connected in series to form a battery group, and then three battery groups can be connected in parallel.

[0082] In some embodiments, the solar cell may be a perovskite solar cell.

[0083] Perovskite solar cells are solar cells that use perovskite-type organic metal halide semiconductors as light-absorbing materials and belong to the third generation of solar cells.

[0084] In this embodiment, the sub-cells 110 in the battery module 100 are divided by arcs, and the component appearance of the perovskite solar cell may include an arc shape, which broadens the use scenarios of the component and fully utilizes the space. The arc design reduces the series resistance between the sub-cells 110.

[0085] In some embodiments, the solar cell may be a silicon-based solar cell.

[0086] In some embodiments, the solar cell may be an organic solar cell.

[0087] In some embodiments, the solar cell has an arc-shaped edge, and the third side of the sub-cell 110 located at the arc-shaped edge close to the arc-shaped edge is arc-shaped.

[0088] The solar cell can be circular or elliptical. The sub-cell 110 located at the arc edge has only one first side 111 connected to the adjacent sub-cell 110. For the sub-cell 110 located at the arc edge, the third side close to the arc edge can be set to an arc shape that matches the arc edge shape of the solar cell, so that the sub-cell 110 of the battery module 100 can fit the circular edge of the solar cell, thereby improving the space utilization of the solar cell.

[0089] It should be noted that the third side of the sub-cell 110 located at the arc edge and close to the arc edge is not adjacent to other sub-cells 110 .

[0090] For example, Figure 1 As shown, the first side 111 on the right side of the leftmost sub-cell 110 in the battery module 100 is adjacent to another sub-cell 110, and the third side on the left side is not adjacent to other sub-cells 110. The third side on the left side can be set to an arc shape and arranged at the edge of the circular solar cell.

[0091] For example, Figure 4 As shown, the first side 111 on the left side of the rightmost sub-cell 110 in the battery module 100 is adjacent to another sub-cell 110, and the third side on the right side is not adjacent to other sub-cells 110. The third side on the right side can be set to an arc shape and arranged at the edge of a circular solar cell. Multiple fan-shaped battery modules 100 can be arranged in the solar cell to improve space utilization.

[0092] A specific embodiment is described below.

[0093] When the photovoltaic installation location includes a rectangular area and a cylindrical area, a rectangular battery array can be arranged in the rectangular area, and a solar cell including a sub-cell 110 with an arc-shaped first side 111 and an arc-shaped third side can be arranged in the cylindrical area. The arc-shaped line design can completely fill the cylindrical area and make full use of the space.

[0094] An embodiment of the present application further provides a photovoltaic component, which includes: at least one solar cell as described above.

[0095] According to the photovoltaic assembly provided in the embodiment of the present application, by setting the first side 111 of the adjacent position of the series-connected sub-cells 110 to an arc shape, the series resistance between the sub-cells 110 is effectively reduced. It is suitable for battery modules 100 of different shapes, can meet the different scene usage requirements of solar cells, and has high space utilization.

[0096] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0097] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0098] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0099] In the description of the present application, “plurality” means two or more.

[0100] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0101] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0102] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0103] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A solar cell, characterized in that: include: At least one battery module, the battery module comprising a plurality of sub-batteries arranged along a first direction, the plurality of sub-batteries arranged along the first direction being connected in series in sequence, two adjacent sub-batteries being connected to each other via a first side edge of the sub-battery, the first side edge being arranged along a second direction intersecting the first direction and the first side edge being arc-shaped.

2. The solar cell according to claim 1, characterized in that The shapes of the first side edges of two adjacent sub-batteries match each other.

3. The solar cell according to claim 2, characterized in that: The two first side edges opposite to each other on the sub-cell are both concave arcs or both convex arcs.

4. The solar cell according to claim 2, characterized in that: The two first side edges arranged opposite to each other on the sub-battery have one side being a concave arc and the other side being a convex arc.

5. The solar cell according to claim 1, characterized in that: The sub-cell further includes a second side edge arranged along the first direction, and the second side edge is a straight line.

6. The solar cell according to claim 1, characterized in that The photoelectric conversion regions of the sub-cells in the battery module are the same in area.

7. The solar cell according to any one of claims 1 to 6, characterized in that: The solar cell includes a plurality of battery modules, and the plurality of battery modules are connected in series or in parallel.

8. The solar cell according to any one of claims 1 to 6, characterized in that: The solar cell is a perovskite solar cell, a silicon-based solar cell or an organic solar cell.

9. The solar cell according to any one of claims 1 to 6, characterized in that: The solar cell has an arc-shaped edge, and the third side edge of the sub-cell located at the arc-shaped edge close to the arc-shaped edge is arc-shaped.

10. A photovoltaic module, characterized in that: include: At least one solar cell according to any one of claims 1 to 9.

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