Solar cell electrode, solar cell and photovoltaic module

Abstract

Disclosed in the present application are a photovoltaic module and a preparation method therefor. The photovoltaic module comprises a back sheet and a cell unit, wherein the cell unit is paved on the back sheet; the cell unit comprises a first string group, a second string group, and a plurality of first connecting pieces which are disposed between the first string group and the second string group and are spaced apart from each other in a first direction; a cell in each cell string that is close to one end of the first connecting piece is set to be an aligned cell, and an electrode component on the aligned cell is connected to the first connecting piece by means of a second connecting piece; there is a first gap between every two adjacent first connecting pieces, and there is a second gap between every two adjacent aligned cells; and lead holes are provided at the positions, which correspond to the first gaps, of the back sheet, and the center line of each lead hole in the first direction is staggered with the adjacent second gap, and the difference between a distance from the center line of the lead hole to the second connecting piece, which is connected to an end portion of one of the first connecting pieces, and a distance from the center line of the lead hole to the second connecting piece, which is connected to an end portion of the other first connecting piece, is within a preset range.

Description

Solar cell electrodes, solar cells and photovoltaic modules

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 20, 2024, with application number 202410323565.7 and invention name “A photovoltaic module and its preparation method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of photovoltaic technology, and specifically relates to a photovoltaic module and a preparation method thereof. Background Art

[0003] Solar cells convert sunlight into electricity. They utilize the photovoltaic principle to generate charge carriers, which are then extracted using electrodes, ultimately converting solar energy into electricity. Back-contact solar cells have garnered increasing attention in recent years. Because their metal electrodes are located on the back of the cell, leaving the front unobstructed by metal electrodes, they offer higher short-circuit currents. Furthermore, these unobstructed front-facing cells are aesthetically pleasing and easier to assemble.

[0004] In the photovoltaic module manufacturing process, multiple cells are arranged according to a specific structure to form a battery string. These strings are then connected to busbars to form battery cells. Lead wires are provided in the battery cells to connect them to the junction box outside the photovoltaic module. In related art, due to the limitations of the cell layout, the lead holes on the backsheet are usually located in the middle of the backsheet to allow the lead wires to pass through the lead holes. However, when the photovoltaic module is subjected to external loads, stress concentration in the center of the backsheet can easily lead to cracking. Summary of the Invention

[0005] The present application aims to provide a photovoltaic module and a preparation method thereof, which can solve the problem that when the photovoltaic module is subjected to external loads, stress concentration in the center of the backboard of the photovoltaic module layout structure in the related art may easily lead to cracking.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a photovoltaic module, comprising: a backsheet and a battery unit, wherein the battery unit is laid on the backsheet;

[0008] The battery unit includes a first string group, a second string group, and a plurality of first connectors arranged between the first string group and the second string group and spaced apart along a first direction; the first string group and the second string group include a plurality of battery strings spaced apart along the first direction; the battery string includes a plurality of battery cells spaced apart along a second direction;

[0009] The battery cell in the battery string close to one end of the first connector is set as an aligned battery cell, and the electrode component on the aligned battery cell is connected to the first connector via a second connector; a first gap exists between two adjacent first connectors, and a second gap exists between two adjacent aligned battery cells; the back plate is provided with a lead hole at a position corresponding to the first gap, and the center line of the lead hole is staggered with the adjacent second gap along the first direction, and the staggered means that the projection of the center line of the lead hole along the second direction does not overlap with the projection of the adjacent second gap along the second direction; and the difference between the distance from the center line of the lead hole to the second connector connected to one end of the first connector and the distance from the center line of the lead hole to the other second connector connected to the other end of the first connector is within a preset range.

[0010] Optionally, two electrode components with opposite conductivity types are provided on the surface of the battery cell, and the two electrode components with opposite conductivity types are arranged alternately in sequence along the first direction; the arrangement structure of the electrode components on the two adjacent opposing battery cells along the first direction is opposite, and the conductivity types of the electrode components connected to the first connecting member of the two adjacent opposing battery cells are opposite.

[0011] Optionally, along the second direction, the electrode components on the aligned battery cells on two opposite sides of the first connector have the same arrangement structure.

[0012] Optionally, along the second direction, the arrangement structures of the electrode components on two adjacent battery cells in the battery string are opposite.

[0013] Optionally, along the first direction, the electrode components of two adjacent battery cells at positions close to one side edge of each other have the same conductivity type.

[0014] Optionally, the two electrode members of opposite conductivity types include a first electrode member and a second electrode member, the two adjacent battery cells in the battery string are a first battery cell and a second battery cell, the first battery cell is provided with the first electrode member and the second electrode member alternately arranged along the first direction, and the second battery cell is provided with the second electrode member and the first electrode member alternately arranged along the first direction;

[0015] The first electrode component of the first battery cell is connected to the second electrode component of the second battery cell via a second connector, and / or the second electrode component of the first battery cell is connected to the first electrode component of the second battery cell via a second connector.

[0016] Optionally, the preset range is: -10mm-10mm.

[0017] Optionally, the battery unit further includes a plurality of third connectors, and the electrode components at one end of the battery string away from the first connector are connected to the third connectors via the second connectors.

[0018] Optionally, a bending portion is provided in the second connecting member, and the bending portion is connected to the end portion of the third connecting member.

[0019] Optionally, along the first direction, the distance between the end of the third connector connected to the bent portion of the second connector and the end of another adjacent third connector connected to another adjacent second connector is greater than twice the distance between two adjacent electrode components on the battery cell.

[0020] Optionally, two adjacent battery cells in the battery string are rotationally symmetrical along the second direction; and / or, the battery cells are sliced ​​battery cells; and / or, the battery cells are back-contact batteries; and / or, the electrode components include at least one of metal grid lines and pads.

[0021] Optionally, the lead hole is staggered with the center of the back plate; and / or the lead hole is at least one of a circular hole, a waist-shaped hole, an elliptical hole and a polygonal hole; and / or the photovoltaic module can withstand a mechanical load greater than or equal to 2400Pa.

[0022] In a second aspect, an embodiment of the present application provides a method for preparing a photovoltaic module, which is used to prepare any of the photovoltaic modules described above, comprising:

[0023] Providing a battery cell, wherein the battery cell is provided with an electrode component;

[0024] Prepare a first string group and a second string group; each of the first string group and the second string group includes a plurality of battery strings spaced apart along a first direction; the battery strings include a plurality of battery cells spaced apart along a second direction;

[0025] The first string group and the second string group are connected to form a battery unit by at least a first connector, the battery cell in the battery string near one end of the first connector is set as an aligned battery cell, and the electrode member on the aligned battery cell is connected to the first connector by a second connector; a first gap exists between two adjacent first connectors, and a second gap exists between two adjacent aligned battery cells;

[0026] The battery cell is laid on a back plate, and a lead hole is provided on the back plate at a position corresponding to the first gap. The center line of the lead hole is staggered with the adjacent second gap along the first direction. The staggered means that the projection of the center line of the lead hole along the second direction does not overlap with the projection of the adjacent second gap along the second direction; and the difference between the distance from the center line of the lead hole to the second connector connected to one end of the first connector and the distance from the center line of the lead hole to the other second connector connected to the other end of the first connector is within a preset range.

[0027] Optionally, the preparation of the first string group and the second string group includes at least: arranging and connecting a plurality of the battery cells to form a first battery string, a second battery string, a third battery string and a fourth battery string respectively; arranging a plurality of the first battery strings, the second battery strings, the third battery strings and the fourth battery strings along the first direction and along the second direction to form the first string group and the second string group.

[0028] Optionally, the plurality of battery cells include a first battery cell and a second battery cell, and the electrode arrangement structures on the first battery cell and the second battery cell are opposite; and arranging and connecting the plurality of battery cells to form a first battery string, a second battery string, a third battery string, and a fourth battery string, respectively, includes:

[0029] A plurality of the first battery cells and the second battery cells are connected to form the first battery string and the second battery string respectively, and the first battery string and the second battery string are arranged along a first direction; a plurality of the first battery cells and the second battery cells are connected to form the third battery string and the fourth battery string respectively, and the third battery string and the fourth battery string are arranged along the first direction.

[0030] Optionally, the plurality of battery cells include a first battery cell and a second battery cell, and the electrode arrangement structures on the first battery cell and the second battery cell are opposite; and arranging and connecting the plurality of battery cells to form a first battery string, a second battery string, a third battery string, and a fourth battery string, respectively, includes:

[0031] A plurality of the first battery cells and the second battery cells are connected to form the first battery string and the third battery string respectively, and the first battery string and the third battery string are arranged along the second direction; a plurality of the first battery cells and the second battery cells are connected to form the second battery string and the fourth battery string respectively, and the second battery string and the fourth battery string are arranged along the second direction.

[0032] Optionally, the first battery cell is provided with first electrode components and second electrode components alternately arranged along the first direction, and the second battery cell is provided with second electrode components and first electrode components alternately arranged along the first direction.

[0033] Optionally, the number of battery cells in each battery string is an odd number or an even number.

[0034] In an embodiment of the present application, a plurality of battery cells are rationally arranged to form a first string group and a second string group, and the first string group and the second string group are connected to form a battery cell using at least a first connector. A first gap is formed between two adjacent first connectors in the battery cell, and a second gap is formed between two adjacent aligned battery cells. A lead hole is provided on the backsheet at a position corresponding to the first gap, so that the center line of the lead hole is offset from the adjacent second gap, and the difference between the distance from the center line of the lead hole to the second connector connected to the end of one of the first connectors and the distance from the center line of the lead hole to the second connector connected to the end of the other first connector is within a preset range. The photovoltaic module structure of the present application can ensure that the lead hole provided in the backsheet is offset from the center position of the backsheet, thereby reducing stress concentration on the backsheet at the lead hole. At the same time, it can also ensure that there is sufficient space at the ends of the two first connectors for the lead wires to be provided, thereby avoiding interference between the lead wires and the second connectors.

[0035] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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:

[0037] FIG1 is a schematic diagram of a photovoltaic module according to an embodiment of the present application;

[0038] FIG2 is a partial structural diagram of a plurality of aligned battery cells connected to a first connector according to an embodiment of the present application;

[0039] FIG3 is a schematic diagram of preparing a first battery string when the number of battery cells is odd according to an embodiment of the present application;

[0040] FIG4 is a schematic diagram of preparing a second battery string when the number of battery cells is odd according to an embodiment of the present application;

[0041] FIG5 a is a schematic diagram of preparing a third battery string when the number of battery cells is odd according to an embodiment of the present application;

[0042] FIG5 b is a schematic diagram of another preparation method of a third battery string when the number of battery cells is odd according to an embodiment of the present application.

[0043] FIG6 a is a schematic diagram of preparing a fourth battery string when the number of battery cells is odd according to an embodiment of the present application;

[0044] FIG6b is a schematic diagram of another preparation method of a fourth battery string when the number of battery cells is odd according to an embodiment of the present application.

[0045] FIG7 is a schematic diagram of another photovoltaic assembly according to an embodiment of the present application;

[0046] FIG8 is a schematic diagram of preparing a first battery string when the number of battery cells is even according to an embodiment of the present application;

[0047] FIG9 is a schematic diagram of preparing a second battery string when the number of battery cells is even according to an embodiment of the present application;

[0048] FIG10 is a schematic diagram of preparing a third battery string when the number of battery cells is even according to an embodiment of the present application;

[0049] FIG11 is a schematic diagram of preparing a fourth battery string when the number of battery cells is even according to an embodiment of the present application;

[0050] FIG12 is a schematic diagram of another photovoltaic assembly according to an embodiment of the present application;

[0051] FIG13 is a schematic diagram of another photovoltaic assembly according to an embodiment of the present application;

[0052] FIG14 is a schematic diagram of a connection structure between a battery string and a third connector according to an embodiment of the present application;

[0053] FIG15 is a schematic diagram of a connection structure between another battery string and a third connector according to an embodiment of the present application;

[0054] FIG16 is a schematic diagram of a connection structure between another battery string and a third connector according to an embodiment of the present application;

[0055] FIG17 is a schematic diagram of a backsheet in a photovoltaic module according to an embodiment of the present application;

[0056] FIG18 is a flow chart of a method for preparing a photovoltaic module according to an embodiment of the present application.

[0057] Figure markings: 10: back plate; 10a: lead hole; 20: battery cell; 21: first string group; 22: second string group; 23: first connector; 24: second connector; 24a: bending portion; 25: third connector; 211: first battery string; 212: second battery string; 221: third battery string; 222: fourth battery string; 200: battery cell; 200a: aligned battery cell; 201: first battery cell; 202: second battery cell; 301: first electrode member; 302: second electrode member; M1: first gap; M2: second gap; X: first direction; Y: second direction; O: center line of the lead hole. Specific embodiments

[0058] The embodiments of the present application will be described in detail below. 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 are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0059] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. In the description of this application, unless otherwise specified, "repeated" means one or more repetitions, and "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the connected objects.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships 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.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0062] The photovoltaic module and the preparation method thereof provided in the embodiments of the present application are described in detail below with reference to specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0063] As shown in Figures 1, 2 and 17, photovoltaic modules according to some embodiments of the present application include: a backplane 10 and a battery cell 20, the battery cell 20 is laid on the backplane 10; the battery cell 20 includes a first string group 21, a second string group 22 and a plurality of first connectors 23 arranged between the first string group 21 and the second string group 22 and arranged at intervals along the first direction X; the first string group 21 and the second string group 22 each include a plurality of battery strings arranged at intervals along the first direction X; the battery string includes a plurality of battery cells 200 arranged at intervals along the second direction Y, and the battery cells 200 are provided with electrode components.

[0064] Furthermore, the battery cell 200 near one end of the first connector 23 in the battery string is set as an aligned battery cell 200a, and the electrode component on the aligned battery cell 200a is connected to the first connector 23 via the second connector 24; a first gap M1 is provided between two adjacent first connectors 23, and a second gap M2 is provided between two adjacent aligned battery cells 200a; the backplane 10 is provided with a lead hole 10a at a position corresponding to the first gap M1, and the center line O of the lead hole 10a is staggered with the adjacent second gap M2 along the first direction X, wherein the staggering means that the projection of the center line O of the lead hole 10a along the second direction Y does not overlap with the projection of the adjacent second gap M2 along the second direction Y; and the difference between the distance from the center line O of the lead hole 10a to the second connector 24 connected to the end of one of the first connectors 23 and the distance from the center line O of the lead hole 10a to the other second connector 24 connected to the end of the other first connector 23 is within a preset range.

[0065] In an embodiment of the present application, a plurality of battery cells 200 are rationally structurally arranged to form a first string group 21 and a second string group 22, and the first connector 23 is used to connect the first string group 21 and the second string group 22 in parallel to form a battery unit 20. A first gap M1 is formed between two adjacent first connectors 23 in the battery unit 20, and a second gap M2 is formed between two adjacent aligned battery cells 200a. The back plate 10 is provided with a lead hole 10a at a position corresponding to the first gap M1, so that the center line O of the lead hole 10a is staggered with the adjacent second gap M2, and the difference between the distance from the center line O of the lead hole 10a to the second connector 24 connected to the end of one of the first connectors 23 and the distance from the center line O of the lead hole 10a to the other second connector 24 connected to the end of the other first connector 23 is within a preset range. By adopting the photovoltaic module structure in the present application, it is possible to ensure that the lead hole 10a set in the back panel 10 deviates from the center position of the back panel 10, thereby reducing the stress concentration of the back panel 10 at the lead hole 10a. At the same time, it is also possible to ensure that there is sufficient space at the ends of the two first connecting members 23 for setting the lead wires, thereby avoiding interference between the lead wires and the second connecting member 24.

[0066] Specifically, the photovoltaic assembly has a first direction X and a second direction Y intersecting each other. Preferably, the first direction X and the second direction Y are perpendicular to each other. The photovoltaic assembly includes a first string group 21 and a second string group 22 spaced apart along the second direction Y. A plurality of first connectors 23 spaced apart along the first direction X are disposed between the first string group 21 and the second string group 22. The first connectors 23 extend along the first direction X. At least the first connectors 23 are connected to the battery strings in the first string group 21 and the second string group 22, respectively, to connect the first string group 21 and the second string group 22 to form a battery unit 20.

[0067] For example, the first connector 23 may be a busbar, and the second connector 24 may be a welding ribbon. The second connector 24 may be used to connect the aligned battery cells 200a in the battery string to the first connector 23, or may be used to connect the electrode components on two adjacent battery cells 200 in the battery string. Of course, the first connector 23 and the second connector 24 may also be other conductive structural members, and multiple first connectors 23 may be completely different or partially the same, which is not limited in this embodiment of the present application.

[0068] Among them, the first string group 21 and the second string group 22 each include a plurality of battery strings arranged at intervals along the first direction X and connected in sequence, and the battery string includes a plurality of battery cells 200 arranged at intervals along the second direction Y and connected in sequence, and the plurality of battery cells 200 in the same battery string are connected in series in sequence.

[0069] The first battery string group 21 includes first battery strings 211 and second battery strings 212 arranged alternately along the first direction X, and the second battery string group 22 includes third battery strings 221 and fourth battery strings 222 arranged alternately along the first direction X. The first battery string 211 and the third battery string 221 are arranged opposite each other along the second direction Y, and are connected by the same first connector; the second battery string 212 and the fourth battery string 222 are arranged opposite each other along the second direction Y, and are connected by another first connector 23.

[0070] Specifically, the battery cells 200 near one end of the first connector 23 in the first battery string 211, the second battery string 212, the third battery string 221 and the fourth battery string 222 are set as aligned battery cells 200a, and the aligned battery cells 200a are provided with alternatingly arranged first electrode components 301 and second electrode components 302, and the conductivity types of the first electrode components 301 and the second electrode components 302 are opposite.

[0071] For example, as shown in FIG1 , the first direction X is set to be from left to right, and the second direction Y is set to be from top to bottom. Of course, the first direction X can also be set to be from right to left, and the second direction Y can be set to be from bottom to top. It should be noted that the following embodiments will be explained using the example of the first direction X being from left to right and the second direction Y being from top to bottom. When the first direction X and the second direction Y are other directions, the same can be applied accordingly, and the embodiments of the present application are not limited thereto.

[0072] Specifically, as shown in FIG1 , a battery string near the left edge of the first battery string group 21 is a first battery string 211 , and the battery string adjacent to the right of the first battery string 211 is a second battery string 212 . Furthermore, the first battery strings 211 and the second battery strings 212 are arranged alternately along the first direction X. The aligned battery cells 200 a of the first battery string 211 near the end of the first connector 23 are provided with first electrode members 301 and second electrode members 302 arranged alternately along the first direction X; the aligned battery cells 200 a of the second battery string 212 near the end of the first connector 23 are provided with second electrode members 302 and first electrode members 301 arranged alternately along the first direction X.

[0073] Correspondingly, the cell string near the left edge of the second cell string group 22 is a third cell string 221. A fourth cell string 222 is provided to the right of the third cell string 221. Furthermore, the third cell string 221 and the fourth cell string 222 are arranged alternately along the first direction X. Specifically, the aligned cell sheets 200a of the third cell string 221 near the end of the first connector 23 are provided with first electrode members 301 and second electrode members 302 arranged alternately along the first direction X. The aligned cell sheets 200a of the fourth cell string 222 near the end of the first connector 23 are provided with second electrode members 302 and first electrode members 301 arranged alternately along the first direction X.

[0074] Furthermore, the first electrode components 301 on the aligned battery cells 200a in the first battery string 211 and the third battery string 221 are connected to a corresponding first connector through the second connector 24, and the second electrode components 302 on the aligned battery cells 200a in the second battery string 212 and the fourth battery string 222 are connected to another corresponding first connector 23.

[0075] Among them, the first electrode component 301 at the rightmost end of the aligned battery cell 200a of the first battery string 211 is connected to the right end of a first connector 23 through the second connector 24, and the second electrode component 302 at the leftmost end of the aligned battery cell 200a of the second battery string 212 is connected to the left end of another first connector 23 through the second connector 24. At this time, a position for the second electrode component 302 is reserved at the rightmost edge of the first battery string 211 and is not connected to the first connector 23.

[0076] As shown in Figures 1 and 2, the rightmost end of the first connector 23 between the first battery string 211 and the third battery string 221 is connected to a second connector 24, serving as the first-second connector. The leftmost end of the first connector 23 between the second battery string 212 and the fourth battery string 222 is also connected to a second connector 24, serving as the second-second connector. A first gap M1 is formed between the two first connectors 23. The backplane 10 is provided with at least one lead hole 10a, corresponding to each first gap M1. Furthermore, the centerline O of the lead hole 10a can be offset toward the first battery string 211 so that the centerline O of the lead hole 10a is offset from the second gap M2 between the two most adjacent aligned battery cells 200a. As shown in Figure 2, the first gap M1 is offset from the most adjacent second gap M2 above it and also from the most adjacent second gap M2 below it. At the same time, the distance from the center line O of the lead hole 10a to the first and second connectors is set to D10, and the distance from the center line O of the lead hole 10a to the second connector is set to D11, so that the difference between D10 and D11 is within a preset range.

[0077] The staggered center line O of the lead hole 10a and the adjacent second gap M2 along the first direction X means that the projection of the center line O of the lead hole 10a along the second direction Y and the projection of the adjacent second gap M2 along the second direction Y do not overlap.

[0078] It is understood that a lead wire is typically provided at the end of the first connector 23. The backsheet 10 has a lead hole 10a at a position corresponding to the first gap M1 between the two first connectors 23. This allows the lead wire to pass through the lead hole 10a in the backsheet 10 and then connect to the junction box outside the photovoltaic module, thereby conducting the current collected by the first connector 23 to the junction box. However, the first gap M1 between the two first connectors 23 affects the location of the lead hole 10a.

[0079] At the same time, due to the limitation of the size of the first gap M1 between the two first connectors 23, if the gap between the lead wires set at the ends of the two first connectors 23 is too small, a short circuit is likely to occur. Moreover, since the ends of the first connectors 23 need to be connected to the second connector 24 and need to be bent to form lead wires to connect to the junction box, mutual interference between the lead wires and the second connector 24 is likely to occur, which is inconvenient for the welding operation of the second connector 24 and the lead wires.

[0080] In the embodiment of the present application, by properly arranging the multiple battery cells 200 in the battery unit 20, a portion of the second electrode member 302 is reserved at the rightmost edge of the first battery string 211 and is not connected to the first connector 23. This allows the lead hole 10a to be offset toward the first battery string 211, and the centerline O of the lead hole 10a is offset from the second gap M2 between the two adjacent aligned battery cells 200a. At the same time, the distances from the centerline O of the lead hole 10a to the second connectors 24 connected to the ends of the two first connectors 23 are equal or similar. This ensures that both ends of the first connectors 23 have a certain amount of blank space for arranging the lead wires and the second connector 24, thus avoiding interference between the lead wires and the second connector 24.

[0081] At the same time, as shown in Figures 1 and 17, the photovoltaic module structure of the embodiment of the present application can be used to offset the opening position of the lead hole 10a in the backsheet 10 from the center of the backsheet 10, thereby avoiding the problem of the backsheet 10 being cracked due to stress concentration at the center of the backsheet 10 when subjected to external loads. It should be noted that, as shown in Figure 17, the dotted line in the figure represents the position of the lead hole in a traditional backsheet, and the solid line in the figure represents the position of the lead hole in the backsheet of the embodiment of the present application.

[0082] In some embodiments, at least one lead hole 10a is provided in the back plate 10, forming a first gap M1 between the two first connectors 23. A lead hole 10a is provided at each location of the first gap M1. For example, the lead hole 10a can be a circular hole, an elliptical hole, a waist-shaped hole, a hole with a partial elliptical arc or a partial circular arc, a triangular hole, a square hole, a rectangular hole, or other polygonal hole in the back plate 10. The lead hole 10a has a centerline.

[0083] In some embodiments, the photovoltaic module structure of the embodiments of the present application can improve the load resistance of the photovoltaic module. Specifically, the photovoltaic module can withstand a mechanical load greater than or equal to 2400 Pa. The mechanical load is a static mechanical load.

[0084] Optionally, the preset range of the difference between D10 and D11 is: -10mm-10mm. In the embodiment of the present application, by setting a reasonable value range for the difference between D10 and D11, the lead hole 10a is located near the middle between the two second connectors 24. This ensures that there is sufficient space between the two first connectors 23 for the lead hole 10a, and also ensures that there is sufficient space at the ends of the two first connectors 23 for the lead wires, thereby avoiding interference between the lead wires and the second connectors 24.

[0085] Specifically, the preset range can be set to: -10mm, -9mm, -8mm, -7mm, -6mm, -5mm, -4mm, -3mm, -2mm, -1mm, 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm or any other value or the range between any two values.

[0086] In some embodiments, the battery cell 200 can be configured as a sliced ​​battery. For example, a sliced ​​battery is a half-cell battery, which can also be understood as a half-cell battery or a two-cell battery; or a sliced ​​battery can be a three-cell battery, a four-cell battery, or an eight-cell battery.

[0087] In other embodiments, a plurality of electrode members are provided on the surface of the cell 200, including a first electrode member 301 and a second electrode member 302 of opposite conductivity types. Preferably, the number of first electrode members 301 and second electrode members 302 on the cell 200 is equal. The electrode members may be metal busbars provided on the surface of the cell 200, or may be solder pads or solder joints provided on the surface of the cell 200 and arranged along a straight line.

[0088] Of course, the number of the first electrode components 301 and the second electrode components 302 may also be set to be unequal. The number of the first electrode components 301 and the second electrode components 302 may be flexibly set according to actual conditions, and this embodiment of the present application does not limit this.

[0089] Furthermore, the battery cell 200 can be a back-contact battery, the battery cell 200 has a light-receiving surface and a backlight surface, the first electrode component 301 and the second electrode component 302 are both arranged on the backlight surface of the battery cell 200, and the first electrode component 301 and the second electrode component 302 are arranged alternately in sequence.

[0090] In some embodiments, the number of battery cells 200 in a battery string can be an odd number or an even number.

[0091] In some embodiments, the shape of the battery cell 200 may be rectangular, square, polygonal, etc. In order to improve space utilization, the battery cell 200 may be configured as a rectangle or a nearly rectangular shape.

[0092] In some embodiments, the cell 200 may be a monocrystalline silicon solar cell, a polycrystalline silicon solar cell, an amorphous silicon solar cell, or a multi-compound solar cell, etc. Specifically, the multi-compound solar cell may be a cadmium sulfide solar cell, a gallium arsenide solar cell, a copper indium selenide solar cell, or a perovskite solar cell, etc.

[0093] Optionally, as shown in Figure 1, two electrode components with opposite conductivity types are provided on the surface of the battery cell 200, and the two electrode components with opposite conductivity types are arranged alternately in sequence along the first direction X; the arrangement structure of the electrode components on two adjacent aligned battery cells 200a along the first direction X is opposite, and the conductivity types of the electrode components connected to the first connecting member 23 of the two adjacent aligned battery cells 200a are opposite.

[0094] In the embodiment of the present application, the electrode components on two adjacent aligned battery cells 200a along the first direction X are arranged in opposite configurations, and the electrode components connected to the first connectors 23 of the two adjacent aligned battery cells 200a have opposite conductivity types. Thus, electrode components of different conductivity types on two adjacent aligned battery cells 200a are connected to corresponding first connectors 23. Furthermore, the electrode components on two adjacent aligned battery cells 200a along the first direction X are arranged in opposite configurations, allowing for a sufficient space between two adjacent first connectors 23 for flexible placement of lead holes 10a when the battery cells 200 are laid out.

[0095] Specifically, the two electrode members of opposite conductivity types may be a first electrode member 301 and a second electrode member 302. For example, the first electrode member 301 may be a positive electrode member and the second electrode member 302 may be a negative electrode member; or, the first electrode member 301 may be a negative electrode member and the second electrode member 302 may be a positive electrode member. The first electrode members 301 and the second electrode members 302 are arranged in an alternating structure on the battery cell 200, and the alternating arrangement direction of the first electrode members 301 and the second electrode members 302 is consistent with the arrangement direction of the multiple battery strings in the first string group 21 and / or the multiple battery strings in the second string group 22, and are all arranged along the first direction X.

[0096] It should be noted that the electrode component arrangement structure refers to the alternating arrangement structure of the first electrode components 301 and the second electrode components 302 of opposite conductive types on the surface of the battery cell 200. The first electrode components 301 and the second electrode components 302 on the battery cell 200 are arranged alternately, but different starting electrode components will form different arrangement structures.

[0097] Among them, the same arrangement structure of the electrode components means that the electrode components on the two battery cells 200 along the first direction X are arranged according to the structure of "first electrode component 301-second electrode component 302-first electrode component 301-second electrode component 302..."; or, they are arranged according to the structure of "second electrode component 302-first electrode component 301-second electrode component 302-first electrode component 301..."

[0098] Correspondingly, the opposite arrangement structure of the electrode components means that along the first direction X, the electrode components on one of the battery cells 200 are arranged according to the structure of "first electrode component 301-second electrode component 302-first electrode component 301-second electrode component 302...", while the electrode components on the other battery cell 200 are arranged according to the structure of "second electrode component 302-first electrode component 301-second electrode component 302-first electrode component 301..."

[0099] Optionally, as shown in FIG. 1 , the electrode components on the aligned battery cells 200 a on two opposite sides of the first connecting member 23 along the second direction Y have the same arrangement structure.

[0100] In the embodiment of the present application, the electrode component arrangement structure on the opposite battery cells 200a along the second direction Y is the same by setting the first connecting member 23, so that the two battery strings on the opposite sides can be connected together by using the first connecting member 23, and at the same time, the regularity of the layout structure of the battery cell 200 can be improved.

[0101] Optionally, as shown in FIG1 , the arrangement structures of the electrode components on two adjacent battery cells 200 in the battery string along the second direction Y are opposite.

[0102] In the embodiment of the present application, the electrode components on two adjacent battery cells 200 along the second direction Y in each battery string are arranged in opposite structures so that the electrode components on the two battery cells 200 can be connected by the second connecting member 24, so that a battery string is formed by connecting multiple battery cells 200 in series.

[0103] Furthermore, the positions of the electrode members on two adjacent battery cells 200 can be arranged to correspond one to one. That is, the first electrode member 301 on one of the two adjacent battery cells 200 corresponds to the second electrode member 302 on the other battery cell 200, and the second electrode member 302 on one battery cell 200 corresponds to the first electrode member 301 on the other battery cell 200. This facilitates the series connection between the two battery cells 200, shortens the wiring distance of the second connector 24 between the two battery cells 200, and improves the regularity of the arrangement of the battery cells 200 in the same battery string.

[0104] Optionally, as shown in FIG1 , the electrode components of two adjacent battery cells 200 along the first direction X that are close to each other's edges have the same conductivity type.

[0105] In the embodiment of the present application, by arranging the electrode members of two battery cells 200 adjacent to each other along the first direction X to have the same conductivity type at their edges, the electrical isolation distance between the two corresponding battery cells 200 can be appropriately increased.

[0106] For example, taking the two battery cells 200 adjacent to each other along the first direction X in the upper left corner of FIG. 1 , the battery cell 200 on the left is the first battery cell 201, on which the first electrode members 301 and the second electrode members 302 are arranged alternately along the first direction X. The battery cell 200 on the right is the second battery cell 202, on which the second electrode members 302 and the first electrode members 301 are arranged alternately along the first direction X. The second electrode member 302 is provided on a side edge of the first battery cell 201 close to the second battery cell 202, that is, on the right side edge of the first battery cell 201; correspondingly, the second electrode member 302 is also provided on a side edge of the second battery cell 202 close to the first battery cell 201, that is, on the left side edge of the second battery cell 202.

[0107] Of course, the edge positions of the side where two adjacent battery cells 200 are close to each other can both be set as the first electrode member 301. Those skilled in the art can flexibly set it according to actual conditions, and the embodiment of the present application does not limit this.

[0108] Optionally, as shown in Figure 1, two adjacent battery cells 200 in the battery string are a first battery cell 201 and a second battery cell 202, and the first battery cell 201 is provided with a first electrode member 301 and a second electrode member 302 arranged alternately along the first direction X, and the second battery cell 202 is provided with a second electrode member 302 and a first electrode member 301 arranged alternately along the first direction X; the first electrode member 301 of the first battery cell 201 is connected to the second electrode member 302 of the second battery cell 202 through the second connecting member 24, or the second electrode member 302 of the first battery cell 201 is connected to the first electrode member 301 of the second battery cell 202 through the second connecting member 24.

[0109] Specifically, in a battery string, the first electrode member 301 of the first battery cell 201 of two adjacent battery cells 200 is connected to the second electrode member 302 of the second battery cell 202 via the second connector 24, or the second electrode member 302 of the first battery cell 201 of two adjacent battery cells 200 is connected to the first electrode member 301 of the second battery cell 202. Multiple battery cells 200 can then be connected in series to form a battery string using the second connector 24. Furthermore, the electrode members on the first battery cell 201 and the second battery cell 202 correspond one-to-one, facilitating the actual connection operation.

[0110] Optionally, as shown in FIG1 , the battery cell 20 further includes a third connector 25, and the electrode member at one end of the battery string away from the first connector 23 is connected to the third connector 25 via the second connector 24. A plurality of third connectors 25 may be provided, and the plurality of third connectors 25 are spaced apart along the first direction X.

[0111] In the embodiment of the present application, the electrode component (first electrode component 301 or second electrode component 302) on the battery cell 200 at one end of the battery string away from the first connector 23 can be connected to the third connector 25 through the second connector 24. Furthermore, multiple battery strings can be connected using the third connector 25 and the first connector 23.

[0112] Optionally, as shown in FIG. 14 to FIG. 16 , a bending portion 24 a is provided in the second connecting member 24 , and the bending portion 24 a is connected to an end portion of the third connecting member 25 .

[0113] Specifically, the third connecting member 25 is connected to the second connecting member 24 at its end along the first direction X. The second connecting member 24 is provided with a bending portion 24a. The second connecting member 24 is connected to the third connecting member 25 through the bending portion 24a. In this way, it is convenient to flexibly adjust the connection position of the second connecting member 24 and the third connecting member 25.

[0114] In some embodiments, the bent portion 24a at least partially overlaps with the battery cell 200, and the battery cell 200 is provided with an insulating layer at a position corresponding to the bent portion 24a to insulate the bent portion 24a from the battery cell 200 to prevent the second connector from short-circuiting with parts of the battery cell 200 other than the electrode component.

[0115] It should be noted that the bending structure of the bending portion 24a can be flexibly set according to actual conditions, and the embodiment of the present application does not limit this.

[0116] Optionally, as shown in Figure 14, along the first direction X, the distance between the end of the third connecting member 25 connected to the bent portion 24a of the second connecting member 24 and the end of another adjacent third connecting member 25 connected to another adjacent second connecting member 24 is greater than twice the distance between two adjacent electrode components on the battery cell 200.

[0117] In the embodiment of the present application, the second connector 24 to which the end of the third connector 25 is connected is provided with a bending portion 24a, so that the end spacing along the first direction X between the end of the third connector 25 connected to the bending portion 24a of the second connector 24 and the end of another adjacent third connector 25 connected to another adjacent second connector 24 (which does not have a bending portion 24a) is greater than twice the spacing between the two adjacent electrode components on the battery cell 200, thereby increasing the electrical insulation distance between the two adjacent second connectors 24 connected to the two adjacent third connectors 25.

[0118] In some embodiments, the photovoltaic module further includes an encapsulating film layer and a front panel. The front panel is disposed on the side of the battery cell facing away from the back panel 10. The encapsulating film layer is sandwiched between the front panel and the back panel 10. The battery cell 20 is embedded in the encapsulating film layer. The encapsulating film layer can be made of an encapsulating film material such as EVA or POE. The encapsulating film layer can be used to encapsulate and protect the battery cell 20. The front panel and back panel 10 can be made of glass or plastic.

[0119] In some embodiments, the photovoltaic module of the present application has a certain length, width and thickness. Depending on the specific application scenario, the required size specifications of the photovoltaic module are also different, and the corresponding length, width and thickness dimensions are also different.

[0120] For example, the length dimension of the photovoltaic module can be set to: 1741mm-1780mm, or the length dimension of the photovoltaic module can be set to: 1781mm-1820mm, or the length dimension of the photovoltaic module can be set to: 1971mm-2020mm, or the length dimension of the photovoltaic module can be set to: 2161mm-2210mm, or the length dimension of the photovoltaic module can be set to: 2361mm-2400mm, etc.

[0121] For example, the width of the photovoltaic module may be 1120 mm to 1150 mm, or the width of the photovoltaic module may be 1290 mm to 1330 mm.

[0122] Optionally, as shown in FIG18 , the embodiment of the present application further provides a method for preparing a photovoltaic module, which is used to prepare any of the photovoltaic modules in the above embodiments. The specific steps of the preparation method include:

[0123] Step 101: Provide a battery cell 200 , wherein an electrode component is provided on the battery cell 200 .

[0124] Specifically, the cell 200 can be configured as a sliced ​​cell, which can be obtained by cutting a large cell into equal parts to obtain the sliced ​​cells required for typesetting. For example, a sliced ​​cell is a half-cell cell, which can also be understood as a half-cell cell or a two-cell cell; alternatively, a sliced ​​cell can be a three-cell cell, a four-cell cell, or an eight-cell cell, etc.

[0125] Furthermore, a first electrode member 301 and a second electrode member 302 of opposite conductivity types are provided on the surface of the cell 200. For example, the cell 200 in this application is a back-contact cell, and the first electrode members 301 and the second electrode members 302 are alternately arranged on the backlight surface of the cell 200.

[0126] Step 102 : Prepare a first string group 21 and a second string group 22 ; each of the first string group 21 and the second string group 22 includes a plurality of battery strings spaced apart along the first direction X; and the battery strings include a plurality of battery cells 200 spaced apart along the second direction Y.

[0127] In some embodiments, a plurality of battery cells 200 may be arranged in sequence along the second direction Y, and the plurality of battery cells 200 may be connected using a second connector 24 to form a battery string. Furthermore, the plurality of battery strings may be arranged in sequence along the first direction X to form a first string group 21 and a second string group 22.

[0128] Step 103: Connect the first string group 21 and the second string group 22 to form a battery unit 20 via at least a first connector 23; set the battery cell 200 in the battery string near one end of the first connector 23 as an aligned battery cell 200a, and the electrode member on the aligned battery cell 200a is connected to the first connector 23 via a second connector 24; a first gap M1 exists between two adjacent first connectors 23, and a second gap M2 exists between two adjacent aligned battery cells 200a.

[0129] In some embodiments, the first string group 21 and the second string group 22 may be arranged at intervals along the second direction Y, and a plurality of first connectors 23 may be provided between the first string group 21 and the second string group 22, and the plurality of first connectors 23 may be arranged at intervals along the first direction X. Each battery string is provided with an aligned battery cell 200a at one end near the first connector 23, and then, the second connector 24 is used to connect the electrode members on the aligned battery cells 200a in each battery string to the corresponding first connector 23, thereby achieving connection between the first string group 21 and the second string group 22.

[0130] During the arrangement and connection of the battery cells 200 , there is a certain gap between two adjacent first connectors 23 , which is set as the first gap M1 , and there is also a certain gap between two adjacent aligned battery cells 200 a , which is set as the second gap M2 .

[0131] Step 104: Lay the battery cell 20 on the backplate 10. The backplate 10 is provided with a lead hole 10a at a position corresponding to the first gap M1. The center line of the lead hole 10a is staggered with the adjacent second gap M2 along the first direction X. The staggered means that the projection of the center line of the lead hole 10a along the second direction Y and the projection of the adjacent second gap M2 along the second direction Y do not overlap; the difference between the distance from the center line of the lead hole 10a to the second connector 24 connected to the end of one of the first connectors 23 and the distance from the center line of the lead hole 10a to the second connector 24 connected to the end of the other first connector 23 is within a preset range.

[0132] Specifically, at least one lead hole 10a is provided in the back plate 10. When the battery cell 20 is laid on the back plate 10, the lead hole 10a corresponds exactly to the position of the first gap M1 between two adjacent first connectors 23 in the battery cell 20, so that a lead wire can be set at the end of the first connector 23 and pass through the lead hole 10a.

[0133] At the same time, the difference between the distance from the center line of the lead hole 10a to the second connector 24 connected to one end of the first connector 23 and the distance from the center line of the lead hole 10a to the second connector 24 connected to the other end of the first connector 23 is within a preset range.

[0134] In some embodiments, a plurality of battery cells 200 are arranged to form a first string group 21 and a second string group 22, and the first string group 21 and the second string group 22 are connected using at least a first connector 23 to form a battery unit 20. A first gap M1 is formed between two adjacent first connectors 23 in the battery unit 20, and a second gap M2 is formed between two adjacent aligned battery cells 200a. The backplane 10 is provided with a lead hole 10a at a position corresponding to the first gap M1, so that the center line of the lead hole 10a is staggered with the adjacent second gap M2, and the difference between the distance from the axis of the lead hole 10a to the second connector 24 connected to the end of one of the first connectors 23 and the distance from the center line of the lead hole 10a to the second connector 24 connected to the end of the other first connector 23 is within a preset range.

[0135] The photovoltaic module structural design in the present application can ensure that the lead hole 10a set in the back panel 10 deviates from the center position of the back panel 10, thereby reducing the stress concentration of the back panel 10 at the lead hole 10a. At the same time, it can also ensure that there is enough space at the ends of the two first connecting members 23 for setting the lead wires, thereby avoiding interference between the lead wires and the second connecting member 24.

[0136] Optionally, the plurality of battery cells 200 include or consist of a plurality of sequentially arranged first battery cells 201 and second battery cells 202. A single initial battery cell can be cut into two halves to form the first battery cell 201 and the second battery cell 202. The first and second electrode components 301, 302 of opposite conductivity types are provided on the first and second battery cells 201, 202, and the electrode components are arranged in opposite structures on the first and second battery cells 201, 202. Furthermore, the first and second battery cells 201, 202 are connected in a certain layout to form a battery string, thereby forming the battery cell 20.

[0137] In some embodiments, the first battery cell 201 is provided with first electrode members 301 and second electrode members 302 alternately arranged along the first direction X, and the second battery cell 202 is provided with second electrode members 302 and first electrode members 301 alternately arranged along the first direction X.

[0138] Optionally, the preparation of the first string group 21 and the second string group 22 in step 102 includes:

[0139] Step S11, arranging and connecting the plurality of battery cells to form a first battery string, a second battery string, a third battery string, and a fourth battery string respectively;

[0140] Step S12: Arrange the first battery string, the second battery string, the third battery string, and the fourth battery string along the first direction and along the second direction to form the first battery string group and the second battery string group.

[0141] It should be noted that the number of battery cells 200 in each battery string can be an even number or an odd number, and a corresponding preparation method can be set according to the number of battery cells 200 in the battery string.

[0142] In some embodiments, as shown in FIG7 , when the number of battery cells 200 in a battery string is an even number, the preparation method of the embodiments of the present application can be used to form a battery string by connecting multiple battery cells 200 in series, and to form a battery string group or battery unit by connecting multiple battery strings. Furthermore, the arrangement structure of the battery cells 200 in the first string group 21 and the second string group 22 can be such that the electrode component arrangement structure of two adjacent battery cells 200 along the first direction X is opposite, and the electrode component arrangement structure of two adjacent battery cells 200 along the second direction Y is opposite.

[0143] At the same time, the conductivity types of the electrode components connected to the corresponding first connectors 23 of two adjacent aligned battery cells 200a in the same battery string group can be opposite, and the electrode component arrangement structure on the aligned battery cells 200a in the battery string located on opposite sides of the first connector 23 along the second direction Y can be the same.

[0144] In some embodiments, as shown in FIG. 7 to FIG. 11 , the number of battery cells 200 in the battery string is an even number. The specific steps for preparing the first battery string 211 in step S11 are as follows:

[0145] SA1101, place the second battery cell 202 at the beginning of the battery string, followed by the first battery cell 201, the second battery cell 202, and repeat this process until the first battery cell 201 is placed at the end of the battery string;

[0146] SA1102, place multiple second connectors 24 on the second electrode members 302 of the first-end second battery sheet 202, so that one end of the second connector 24 is connected to the corresponding second electrode member 302 and the other end extends outward from the outer edge of the first-end second battery sheet 202;

[0147] SA1103: Place and connect multiple second connectors 24 on the first electrode member 131 of the second battery cell 202 and the second electrode member 302 of the opposite first battery cell 201, and place and connect multiple second connectors 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of another second battery cell 202;

[0148] SA1104. At least partially repeat step SA1103 until multiple second connectors 24 are placed and connected to the first electrode member 131 of the second battery cell 202 and the second electrode member 302 of the opposite end first battery cell 201, and multiple second connectors 24 are placed on the first electrode member 301 of the end first battery cell 201, and one end of the second connector 24 is connected to the corresponding first electrode member 301, and the other end extends outward from the outer edge of the end first battery cell 201. In this way, the preparation of the first battery string 211 can be completed.

[0149] It should be noted that at least partially repeating a step means (the same below): only part of the content in the step can be repeated, or the entire content in the step can be repeated once or multiple times, or the entire content in the step can be repeated once or multiple times and then part of the content in the step can be repeated. Those skilled in the art can make reasonable understandings based on the actual situation between multiple steps or the overall situation, and the embodiments of the present application are not limited to this.

[0150] During the preparation of the first battery string 211, the first battery cells 201 and the second battery cells 202 may be arranged in order, and then all the second connectors 24 may be laid out sequentially or simultaneously and connected to the corresponding electrode members to connect the first battery cells 201 and the second battery cells 202 in series to form the first battery string 211. The specific steps include the following:

[0151] SA1101a, place the second battery cell 202 at the beginning of the battery string, followed by the first battery cell 201 and the second battery cell 202, and repeat this process until the first battery cell 201 is placed at the end of the battery string;

[0152] SA1102a, place multiple second connectors 24 on the second electrode member 302 of the first-end second battery cell 202, so that the second connectors 24 extend upward beyond the outer edge of the first-end second battery cell 202; place multiple second connectors 24 on the first electrode member 131 of the second battery cell 202 and the second electrode member 302 of the opposite first battery cell 201, and place multiple second connectors 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of another second battery cell 202, ..., until multiple second connectors 24 are placed on the first electrode member 131 of the second battery cell 202 and the second electrode member 302 of the opposite end first battery cell 201, and multiple second connectors 24 are placed on the first electrode member 301 of the end first battery cell 201, so that the second connectors 24 extend downward beyond the outer edge of the end first battery cell 201;

[0153] SA1103a , connect the second connecting member 24 to the corresponding first electrode member 301 and second electrode member 302 respectively to complete the preparation of the first battery string 211 .

[0154] For example, as shown in FIG9 , the number of battery cells 200 in the battery string is an even number, and the specific steps of preparing the second battery string 212 in step S11 are as follows:

[0155] SA1105: Place the first battery cell 201 at the beginning of the second battery string 212, followed by the second battery cell 202. Repeat this process until the second battery cell 202 is placed at the end of the battery string.

[0156] SA1106. Place multiple second connectors 24 on the first electrode members 301 of the first battery cell 201 at the head end, so that one end of the second connector 24 is connected to the corresponding first electrode member 301 and the other end extends outward from the outer edge of the first battery cell 202 at the head end;

[0157] SA1107: Place and connect multiple second connectors 24 on the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of the opposite second battery cell 202, and place and connect multiple second connectors 24 on the second electrode member 302 of the second battery cell 202 and the first electrode member 301 of another first battery cell 201;

[0158] SA1108. At least partially repeat step SA1107 until multiple second connectors 24 are placed and connected to the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of the opposite end second battery cell 202, and multiple second connectors 24 are placed on the second electrode member 302 of the end second battery cell 202, and one end of the second connector 24 is connected to the corresponding second electrode member 302, and the other end extends outward from the outer edge of the end second battery cell 202. In this way, the preparation of the second battery string 212 can be completed.

[0159] It should be noted that, during the preparation of the second battery string 212, the first battery cells 201 and the second battery cells 202 can be arranged in order, and then all the second connectors 24 can be laid out sequentially or simultaneously to connect the second battery cells 202 and the first battery cells 201 to form the second battery string 212. The specific steps can be performed with reference to the aforementioned steps SA1101a to SA1103a, with adaptive adjustments being made, and will not be further described in detail in this embodiment of the present application.

[0160] In some embodiments, the third battery string 221 may be prepared with reference to steps SA1105 to SA1108 , and the fourth battery string 222 may be prepared with reference to steps SA1101 to SA1104 . For specific steps, please refer to the aforementioned content, and the embodiments of the present application will not be repeated here.

[0161] In some embodiments, as shown in FIG13 , the number of battery cells 200 in a battery string is an even number. The specific steps for preparing the first battery string 211 in step S11 are as follows:

[0162] SB1101, place the first battery cell 201 at the beginning of the battery string, followed by the second battery cell 202, and repeat this process until the second battery cell 202 is placed at the end of the battery string;

[0163] SB1102, place multiple second connectors 24 on the second electrode members 302 of the first battery cell 201 at the head end, so that one end of the second connector 24 is connected to the corresponding second electrode member 302 and the other end extends outward from the outer edge of the first battery cell 201 at the head end;

[0164] SB1103, placing and connecting a plurality of second connectors 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of the opposite second battery cell 202, and placing and connecting a plurality of second connectors 24 on the first electrode member 301 of the second battery cell 202 and the second electrode member 302 of another first battery cell 201;

[0165] SB1104. At least partially repeat step SB1103 until multiple second connectors 24 are placed and connected to the first electrode component 301 of the first battery cell 201 and the second electrode component 302 of the opposite end second battery cell 202, and multiple second connectors 24 are placed on the first electrode component 301 of the end second battery cell 202, and one end of the second connector 24 is connected to the corresponding first electrode component 301, and the other end extends outward from the outer edge of the end second battery cell 202. In this way, the preparation of the first battery string 211 can be completed.

[0166] It should be noted that, during the preparation of the first battery string 211, the first battery cells 201 and the second battery cells 202 may be arranged in order, and then all the second connectors 24 may be laid out sequentially or simultaneously and connected to the corresponding electrode members to connect the first battery cells 201 and the second battery cells 202 in series to form the first battery string 211. The specific steps include the following:

[0167] SB1101a, place the first battery cell 201 at the beginning of the battery string, followed by the second battery cell 202, and repeat this process until the second battery cell 202 is placed at the end of the battery string;

[0168] SB1102a, placing multiple second connectors 24 on the second electrode member 302 of the first battery cell 201 at the head end, so that the second connectors 24 extend upward beyond the outer edge of the first battery cell 201 at the head end; placing multiple second connectors 24 on the first electrode member 131 of the first battery cell 201 and the second electrode member 302 of the opposite second battery cell 202, and placing multiple second connectors 24 on the first electrode member 301 of the second battery cell 202 and the second electrode member 302 of another first battery cell 201, ..., until multiple second connectors 24 are placed on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of the opposite end second battery cell 202, and placing multiple second connectors 24 on the first electrode member 301 of the end second battery cell 202, so that the second connectors 24 extend downward beyond the outer edge of the end second battery cell 202;

[0169] SB1103a, connect the second connecting member 24 to the corresponding first electrode member 301 and second electrode member 302 respectively to complete the preparation of the first battery string 211.

[0170] Exemplarily, the number of battery cells 200 in the battery string is an even number, and the specific steps of preparing the second battery string 212 in step S11 are as follows:

[0171] SB1105. Place the second battery cell 202 at the beginning of the second battery string 212, followed by the first battery cell 201. Repeat this process in sequence, placing the second battery cell 202, the first battery cell 201, and so on. Finally, place the first battery cell 201 at the end of the battery string.

[0172] SB1106. Place multiple second connectors 24 on the first electrode members 301 of the first-end second battery cell 202, so that one end of the second connector 24 is connected to the corresponding first electrode member 301 and the other end extends outward from the outer edge of the first-end second battery cell 202;

[0173] SB1107. Place and connect a plurality of second connectors 24 on the second electrode member 302 of the second battery cell 202 and the first electrode member 301 of the opposite first battery cell 201, and place and connect a plurality of second connectors 24 on the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of another second battery cell 202.

[0174] SB1108. At least partially repeat step SB1107 until multiple second connectors 24 are placed and connected to the second electrode component 302 of the second battery cell 202 and the first electrode component 301 of the opposite end first battery cell 201, and multiple second connectors 24 are placed on the second electrode component 302 of the end first battery cell 201, and one end of the second connector 24 is connected to the corresponding second electrode component 302, and the other end extends outward from the outer edge of the end first battery cell 201. In this way, the preparation of the second battery string 212 can be completed.

[0175] It should be noted that, during the preparation of the second battery string 212, the first battery cells 201 and the second battery cells 202 can be arranged in order, and then all the second connectors 24 can be laid out to connect the second battery cells 202 and the first battery cells 201 in series to form the second battery string 212. The specific steps can be performed with reference to the aforementioned steps SB1101a to SB1103a, with adaptive adjustments. The embodiments of the present application will not be further described here.

[0176] In some embodiments, the third battery string 221 may be prepared with reference to steps SB1105 to SB1108 , and the fourth battery string 222 may be prepared with reference to steps SB1101 to SB1104 . Specific steps may refer to the aforementioned content, and will not be repeated herein in the embodiments of the present application.

[0177] In other embodiments, as shown in Figures 3 to 6b, when the number of battery cells 200 in a battery string is an odd number, the preparation method in the embodiments of the present application can be used to form a battery string by connecting multiple battery cells 200 in series, and to form a battery string group by multiple battery strings.

[0178] Furthermore, the arrangement structure of the battery cells 200 in the first string group 21 and the second string group 22 can be configured to satisfy the requirement that the electrode component arrangement structures of two adjacent battery cells 200 along the first direction X are opposite, and the electrode component arrangement structures of two adjacent battery cells 200 along the second direction Y are opposite. At the same time, the conductivity types of the electrode components connected to the corresponding first connectors 23 of two adjacent aligned battery cells 200a in the same battery string group can be opposite, and the electrode component arrangement structures of aligned battery cells 200a in the battery strings located on opposite sides of the first connector 23 along the second direction Y can be the same.

[0179] Optionally, step S11: arranging and connecting the plurality of battery cells 200 to form a first battery string 211, a second battery string 212, a third battery string 221, and a fourth battery string 222, respectively, includes:

[0180] A plurality of first battery cells 201 and a plurality of second battery cells 202 are connected to form a first battery string 211 and a second battery string 212, respectively, and the first battery string 211 and the second battery string 212 are arranged along the second direction Y; a plurality of first battery cells 201 and a plurality of second battery cells 202 are connected to form a third battery string 221 and a fourth battery string 222, respectively, and the third battery string 221 and the fourth battery string 222 are arranged along the second direction Y.

[0181] For example, as shown in FIG3 , the specific steps of preparing the first battery string 211 in step S11 are as follows:

[0182] SA2101: Place the first cell 201 at the beginning of the battery string, followed by the second cell 202. Repeat this process until the first cell 201 is placed at the end of the battery string. Meanwhile, temporarily store the remaining second cell 202 to be used in the preparation of another battery string.

[0183] SA2102, place multiple second connectors 24 on the second electrode members 302 of the first battery cell 201 at the head end, so that one end of the second connector 24 is connected to the corresponding second electrode member 302 and the other end extends outward from the outer edge of the first battery cell 201 at the head end;

[0184] SA2103, placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of the opposite second battery cell 202, and placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the second battery cell 202 and the second electrode member 302 of another first battery cell 201;

[0185] SA2104. At least partially repeat step SA2103 until multiple second connectors 24 are placed on the first electrode component 301 of the terminal first battery cell 201, and one end of the second connector 24 is connected to the corresponding first electrode component 301, and the other end extends outward from the outer edge of the terminal first battery cell 201. In this way, the preparation of the first battery string 211 can be completed.

[0186] It should be noted that during the preparation of the first battery string 211, the first battery cells 201 and the second battery cells 202 can be arranged in order, and then all the second connectors 24 can be laid out to connect the first battery cells 201 and the second battery cells 202 in series to form the first battery string 211. The specific steps can be performed with reference to the aforementioned steps SA1101a to SA1103a, with adaptive adjustments. The embodiments of the present application will not be repeated here.

[0187] For example, as shown in FIG4 , the specific steps of preparing the second battery string 212 in step S11 are as follows:

[0188] SA2105: Place the second battery cell 202 at the head end of the battery string, followed by the first battery cell 201. Repeat this process until the second battery cell 202 is placed at the very end of the battery string. The second battery cell 202 placed at the head end is the second battery cell 202 temporarily stored in step SA2101.

[0189] SA2106. Place multiple second connectors 24 on the first electrode members 301 of the first-end second battery cell 202, with one end of the second connector 24 connected to the corresponding first electrode member 301 and the other end extending outward from the outer edge of the first-end second battery cell 202;

[0190] SA2107, placing and connecting a plurality of second connecting members 24 on the second electrode member 302 of the second battery cell 202 and the first electrode member 301 of the opposite first battery cell 201, and placing and connecting a plurality of second connecting members 24 on the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of another second battery cell 202;

[0191] SA2108. At least partially repeat step SA2107 until multiple second connectors 24 are placed on the second electrode member 302 of the terminal second battery cell 202, and one end of the second connector 24 is connected to the corresponding second electrode member 302, and the other end extends outward from the outer edge of the terminal second battery cell 202. In this way, the preparation of the second battery string 212 is completed.

[0192] It should be noted that during the assembly of the second battery string 212, the first battery cells 201 and the second battery cells 202 can be arranged in order, and then all the second connectors 24 can be laid out to connect the first battery cells 201 and the second battery cells 202 in series to form the second battery string 212. The specific steps can be performed with reference to the aforementioned steps SA1101a to SA1103a, with adaptive adjustments. The embodiments of the present application will not be repeated here.

[0193] For example, as shown in FIG5 a , the specific steps of preparing the third battery string 221 in step S11 are as follows:

[0194] SA2201: Place the first cell 201 at the beginning of the battery string, followed by the second cell 202. Repeat this process until the first cell 201 is placed at the end of the battery string. Meanwhile, temporarily store the remaining second cell 202 to be used in the preparation of another battery string.

[0195] SA2202, place multiple second connectors 24 on the first electrode member 301 of the first battery cell 201 at the head end, so that one end of the second connector 24 is connected to the corresponding first electrode member 301 and the other end extends outward from the outer edge of the first battery cell 201 at the head end;

[0196] SA2203, placing and connecting a plurality of second connecting members 24 on the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of the opposite second battery cell 202, and placing and connecting a plurality of second connecting members 24 on the second electrode member 302 of the second battery cell 202 and the first electrode member 301 of another first battery cell 201;

[0197] SA2204. At least partially repeat step SA2203 until multiple second connectors 24 are placed on the second electrode component 302 of the terminal first battery cell 201, and one end of the second connector 24 is connected to the corresponding second electrode component 302, and the other end extends outward from the outer edge of the terminal first battery cell 201. In this way, the preparation of the third battery string 221 can be completed.

[0198] It should be noted that, during the preparation of the third battery string 221, the first battery cells 201 and the second battery cells 202 can be arranged in sequence, and then all the second connectors 24 can be laid out to connect the first battery cells 201 and the second battery cells 202 in series to form the third battery string 221. The specific steps can be performed with reference to the aforementioned steps SA1101a to SA1103a, with adaptive adjustments. The present embodiment will not be further described here.

[0199] For example, as shown in FIG6 a , the specific steps of preparing the fourth battery string 222 in step S11 are as follows:

[0200] SA2205: Place the second battery cell 202 at the head end of the battery string, followed by the first battery cell 201. Repeat this process until the second battery cell 202 is placed at the very end of the battery string. The second battery cell 202 placed at the head end is the second battery cell 202 temporarily stored in step SA2201.

[0201] SA2206. Place multiple second connectors 24 on the second electrode members 302 of the first-end second battery sheet 202, so that one end of the second connector 24 is connected to the corresponding second electrode member 302 and the other end extends outward from the outer edge of the first-end second battery sheet 202;

[0202] SA2207, placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the second battery cell 202 and the second electrode member 302 of the opposite first battery cell 201, and placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of another second battery cell 202;

[0203] SA2208. At least partially repeat step SA2207 until multiple second connectors 24 are placed on the first electrode component 301 of the terminal second battery cell 202, and one end of the second connector 24 is connected to the corresponding first electrode component 301, and the other end extends outward from the outer edge of the terminal second battery cell 202. In this way, the preparation of the fourth battery string 222 is completed.

[0204] It should be noted that, during the preparation of the fourth battery string 222, the first battery cells 201 and the second battery cells 202 can be arranged in sequence, and then all the second connectors 24 can be laid out to connect the second battery cells 202 and the first battery cells 201 in series to form the fourth battery string 222. The specific steps can be performed with reference to the aforementioned steps SA1101a to SA1103a, with adaptive adjustments being made, and will not be further described in detail in this embodiment of the present application.

[0205] In some embodiments, the second battery string 212 may be obtained by rotating the first battery string 211 by 180°, or the first battery string 211 may be obtained by rotating the second battery string 212 by 180°.

[0206] Likewise, the fourth battery string 222 can be obtained by rotating the third battery string 221 by 180°, or the third battery string 221 can be obtained by rotating the fourth battery string 222 by 180°.

[0207] Optionally, step S11: arranging and connecting the plurality of battery cells 200 to form a first battery string 211, a second battery string 212, a third battery string 221, and a fourth battery string 222, respectively, includes:

[0208] The first battery cells 201 and the second battery cells 202 are connected to form the first battery string 211 and the third battery string 221, respectively, and the first battery string 211 and the third battery string 221 are arranged along the second direction Y; the first battery cells 201 and the second battery cells 202 are connected to form the second battery string 212 and the fourth battery string 222, respectively, and the second battery string 212 and the fourth battery string 222 are arranged along the second direction Y.

[0209] In some embodiments, when the number of battery cells in a battery string is an odd number, after the first battery string 211 is prepared, the third battery string 221 can be prepared.

[0210] The specific steps of preparing the first battery string 211 in step S11 are as follows:

[0211] SB2101. Place the first battery cell 201 at the beginning of the battery string, followed by the second battery cell 202. Repeat this process until the first battery cell 201 is placed at the end of the battery string. Meanwhile, the remaining second battery cell 202 is temporarily stored for use in preparing another battery string.

[0212] SB2102, place multiple second connectors 24 on the second electrode members 302 of the first battery cell 201 at the head end, so that one end of the second connector 24 is connected to the corresponding second electrode member 302 and the other end extends outward from the outer edge of the first battery cell 201 at the head end;

[0213] SB2103, placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of the opposite second battery cell 202, and placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the second battery cell 202 and the second electrode member 302 of another first battery cell 201;

[0214] SB2104. At least partially repeat step SB2103 until multiple second connectors 24 are placed on the first electrode component 301 of the end first battery cell 201, and one end of the second connector 24 is connected to the corresponding first electrode component 301, and the other end extends outward from the outer edge of the end first battery cell 201. In this way, the preparation of the first battery string 211 can be completed.

[0215] The specific steps of preparing the third battery string 213 in step S11 are as follows:

[0216] SB2105. Place the first battery cell 201 at the beginning of the battery string, followed by the second battery cell 202. Repeat this process until the second battery cell 202, which has been rotated 180 degrees in step SB2101 and has been temporarily stored at the end of the battery string (i.e., it has essentially become the first battery cell).

[0217] SB2106. Place multiple second connectors 24 on the first electrode members 301 of the first battery cell 201 at the head end, so that one end of the second connector 24 is connected to the corresponding first electrode member 301 and the other end extends outward from the outer edge of the first battery cell 201 at the head end;

[0218] SB2107, placing and connecting a plurality of second connectors 24 on the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of the opposite second battery cell 202, and placing and connecting a plurality of second connectors 24 on the second electrode member 302 of the second battery cell 202 and the first electrode member 301 of another first battery cell 201;

[0219] SB2108. At least partially repeat step SB2107 until multiple second connectors 24 are placed on the second electrode component 302 of the temporarily stored second battery cell 202 (that is, it actually becomes the first battery cell) after the end is rotated 180 degrees, and one end of the second connector 24 is connected to the corresponding second electrode component 302, and the other end extends outward from the outer edge of the end second battery cell 202. In this way, a third battery string 213 can be prepared.

[0220] Alternatively, as shown in FIG5b , the steps for preparing the third battery string 221 in step S11 are as follows:

[0221] SB2105a, placing the second battery cell 202 temporarily stored in step SB2101 at the beginning of the battery string, followed by the first battery cell 201, and repeating this process until the second battery cell 202 is placed at the end of the battery string;

[0222] SB2106a, placing multiple second connectors 24 on the second electrode members 302 of the first-end second battery sheet 202, with one end of the second connector 24 connected to the corresponding second electrode member 302 and the other end extending outward from the outer edge of the first-end second battery sheet 202;

[0223] SB2107a, placing and connecting a plurality of second connectors 24 on the first electrode member 301 of the second battery cell 202 and the second electrode member 302 of the opposite first battery cell 201, and placing and connecting a plurality of second connectors 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of another second battery cell 202;

[0224] S2B108a: Repeat step SB2107a at least partially until multiple second connectors 24 are placed on the first electrode members 301 of the second terminal cell 202, with one end of each second connector 24 connected to the corresponding first electrode member 301 and the other end extending outward from the outer edge of the second terminal cell 202. This completes the first predetermined battery string. The first predetermined battery string is then rotated 180° to obtain the third battery string 221.

[0225] In other embodiments, the second battery string 212 may be prepared first, and then the fourth battery string 222 may be prepared. As shown in FIG4 , the specific steps for preparing the second battery string 212 are as follows:

[0226] SB2201: Place the second battery cell 202 at the beginning of the battery string, followed by the first battery cell 201. Repeat this process until the second battery cell 202 is placed at the end of the battery string. The remaining first battery cell 201 is temporarily stored for use in preparing the fourth battery string 222.

[0227] SB2202, place multiple second connectors 24 on the first electrode members 301 of the first-end second battery cell 202, so that one end of the second connector 24 is connected to the corresponding first electrode member 301 and the other end extends outward from the outer edge of the first-end second battery cell 202;

[0228] SB2203, placing and connecting a plurality of second connectors 24 on the second electrode member 302 of the second battery cell 202 and the first electrode member 301 of the opposite first battery cell 201, and placing and connecting a plurality of second connectors 24 on the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of another second battery cell 202;

[0229] SB2204. At least partially repeat step SB2203 until multiple second connectors 24 are placed on the second electrode component 302 of the terminal second battery cell 202, and one end of the second connector 24 is connected to the corresponding second electrode component 302, and the other end extends outward from the outer edge of the terminal second battery cell 202. In this way, the preparation of the second battery string 212 is completed.

[0230] The specific steps of preparing the fourth battery string 214 in step S11 are as follows:

[0231] SB2205: Place the temporarily stored first battery cell 201 rotated 180 degrees (i.e., converted into the second battery cell) at the beginning of the battery string, followed by the first battery cell 201. Repeat this process in sequence, placing the second battery cell 202, the first battery cell 201, and so on, until the second battery cell 202 is placed at the end of the battery string.

[0232] SB2206. Place multiple second connectors 24 on the second electrode member 302 of the temporarily stored first battery cell 201 (i.e., converted into the second battery cell) after the head end is rotated 180 degrees, so that one end of the second connector 24 is connected to the corresponding second electrode member 302 and the other end extends outward from the outer edge of the temporarily stored first battery cell 201 (i.e., converted into the second battery cell) after the head end is rotated 180 degrees.

[0233] SB2207, placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the temporarily stored first battery cell 201 rotated 180 degrees and the second electrode member 302 of the opposite first battery cell 201, and placing and connecting a plurality of second connecting members 24 on the first electrode member 301 of the first battery cell 201 and the second electrode member 302 of another second battery cell 202;

[0234] SB2208. At least partially repeat step SB2207 until multiple second connectors 24 are placed on the first electrode component 301 of the terminal second battery cell 202, and one end of the second connector 24 is connected to the corresponding second electrode component 301, and the other end extends outward from the outer edge of the terminal second battery cell 202. In this way, the preparation of the fourth battery string 214 can be completed.

[0235] Alternatively, as shown in FIG6b , a fourth battery string 222 is prepared. The specific preparation steps are as follows:

[0236] SB2205a, placing the first battery cell 201 at the beginning of the battery string, followed by the second battery cell 202, and repeating this process until the first battery cell 201 temporarily stored in step SB2201 is placed at the end of the battery string;

[0237] SB2206a, place multiple second connectors 24 on the first electrode member 301 of the first battery cell 201 at the head end, so that one end of the second connector 24 is connected to the corresponding first electrode member 301 and the other end extends outward from the outer edge of the first battery cell 201 at the head end;

[0238] SB2207a, placing and connecting a plurality of second connectors 24 on the second electrode member 302 of the first battery cell 201 and the first electrode member 301 of the opposite second battery cell 202, and placing and connecting a plurality of second connectors 24 on the second electrode member 302 of the second battery cell 202 and the first electrode member 301 of another first battery cell 201;

[0239] SB2208a: At least partially repeat step SB2207a until multiple second connectors 24 are placed on the second electrode members 302 of the terminal first battery cell 201, with one end of each second connector 24 connected to the corresponding second electrode member 302 and the other end extending outward from the outer edge of the terminal first battery cell 201. In this way, a second predetermined battery string is prepared. The second predetermined battery string is then rotated 180° to obtain a fourth battery string 222.

[0240] It can be understood that the use of the preparation method in the above embodiment of the present application to prepare the first battery string 211, the second battery string 212, the third battery string 221 and the fourth battery string 222 respectively can effectively simplify the process steps that need to be performed by the processing equipment and shorten the moving range of the equipment, thereby greatly improving production efficiency.

[0241] In other embodiments, as shown in FIG12 , a battery cell 200 includes a first battery cell 201 and a second battery cell 202 . The first battery cell 201 and the second battery cell 202 can be obtained by cutting the same initial battery cell into two halves. The first battery cell 201 is provided with second electrode members 302 and first electrode members 301 arranged alternately along a first direction X, and the second battery cell 202 is provided with first electrode members 301 and second electrode members 302 arranged alternately along the first direction X. The first battery cell 201 and the second battery cell 202 are then arranged to form a battery cell. Adaptive adjustments need only be made based on the actual arrangement of the first electrode members 301 and second electrode members 302 on the battery cell 200. The steps for preparing the first, second, third, and fourth battery strings in the odd-numbered case can still be referred to. The specific steps can be adapted as described above, and are not limited in this regard.

[0242] In some embodiments, step 103 may further include:

[0243] A plurality of third connectors 25 are provided at intervals on one side of the first string group 21 away from the second string group 22 , and each battery string in the first string group 21 is connected to a corresponding third connector 25 via a second connector 24 ;

[0244] A plurality of spaced third connectors 25 are provided on a side of the second string group 22 facing away from the first string group 21 , and each battery string in the second string group 22 is connected to a corresponding third connector 25 via a second connector 24 .

[0245] In this way, the electrode components on the battery cells at one end of each battery string facing away from the first connector 23 are connected to the corresponding third connector 25 through the second connector 25. Then, by utilizing the cooperation between the third connector 25 and the first connector 23, the connection between multiple battery strings can be achieved, thereby forming a battery unit 20.

[0246] Furthermore, the second connector to which the end of the third connector is connected is bent to form a bent portion, which is then connected to the third connector. The bent portion of the second connector is bent away from another adjacent third connector to increase the distance between the second connectors to which the ends of two adjacent third connectors are connected, thereby preventing the second connectors from being too close to each other and causing a short circuit.

[0247] It can be understood that the preparation method of each battery string in the embodiment of the present application can refer to the specific steps in the above embodiment to prepare the first battery string 211, the second battery string 212, the third battery string 221 and the fourth battery string 222 in sequence, and only needs to be adaptively adjusted according to the actual arrangement structure of the first electrode component 301 and the second electrode component 302 on the battery cell 200. The embodiment of the present application will not be repeated here.

[0248] Throughout this specification, reference to terms such as "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 illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0249] 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized in that: include: a back plate and a battery cell, wherein the battery cell is laid on the back plate; The battery unit includes a first string group, a second string group, and a plurality of first connectors arranged between the first string group and the second string group and spaced apart along a first direction; the first string group and the second string group include a plurality of battery strings spaced apart along the first direction; the battery string includes a plurality of battery cells spaced apart along a second direction; The battery cell in the battery string close to one end of the first connector is set as an aligned battery cell, and the electrode component on the aligned battery cell is connected to the first connector via a second connector; a first gap exists between two adjacent first connectors, and a second gap exists between two adjacent aligned battery cells; the back plate is provided with a lead hole at a position corresponding to the first gap, and the center line of the lead hole is staggered with the adjacent second gap along the first direction, and the staggered means that the projection of the center line of the lead hole along the second direction does not overlap with the projection of the adjacent second gap along the second direction; and the difference between the distance from the center line of the lead hole to the second connector connected to one end of the first connector and the distance from the center line of the lead hole to the other second connector connected to the other end of the first connector is within a preset range.

2. The photovoltaic module according to claim 1, characterized in that Two electrode components of opposite conductivity types are provided on the surface of the battery cell, and the two electrode components of opposite conductivity types are alternately arranged in sequence along the first direction; the arrangement structure of the electrode components on two adjacent aligned battery cells along the first direction is opposite, and the conductivity types of the electrode components connected to the first connecting member of the two adjacent aligned battery cells are opposite.

3. The photovoltaic module according to claim 2, characterized in that Along the second direction, the electrode components on the aligned battery cells on two opposite sides of the first connecting member have the same arrangement structure.

4. The photovoltaic module according to any one of claims 1 to 3, characterized in that: Along the second direction, the arrangement structures of the electrode components on two adjacent battery cells in the battery string are opposite.

5. The photovoltaic module according to claim 2, characterized in that: Along the first direction, the electrode components of two adjacent battery cells at positions close to one edge of each other have the same conductivity type.

6. The photovoltaic module according to claim 2, characterized in that: The two electrode members of opposite conductivity types include a first electrode member and a second electrode member, the two adjacent battery cells in the battery string are a first battery cell and a second battery cell, the first battery cell is provided with the first electrode member and the second electrode member arranged alternately along the first direction, and the second battery cell is provided with the second electrode member and the first electrode member arranged alternately along the first direction; The first electrode component of the first battery cell is connected to the second electrode component of the second battery cell via a second connector, and / or the second electrode component of the first battery cell is connected to the first electrode component of the second battery cell via a second connector.

7. The photovoltaic module according to claim 1, characterized in that The preset range is: -10mm-10mm.

8. The photovoltaic module according to claim 1, characterized in that The battery unit further includes a plurality of third connectors, and the electrode members at one end of the battery string away from the first connector are connected to the third connectors via the second connectors.

9. The photovoltaic module according to claim 8, characterized in that: A bending portion is provided in the second connecting member, and the bending portion is connected to the end portion of the third connecting member.

10. The photovoltaic module according to claim 9, characterized in that: Along the first direction, the distance between the end of the third connector connected to the bent portion of the second connector and the end of another adjacent third connector connected to another adjacent second connector is greater than twice the distance between two adjacent electrode components on the battery cell.

11. The photovoltaic module according to claim 1, characterized in that: Two adjacent battery cells in the battery string are rotationally symmetrical along the second direction; and / or the battery cells are sliced ​​battery cells; and / or the battery cells are back-contact batteries; and / or the electrode components include at least one of metal grid lines and pads.

12. The photovoltaic module according to claim 1, characterized in that The lead hole is staggered with the center of the back plate; and / or the lead hole is at least one of a circular hole, a waist-shaped hole, an elliptical hole and a polygonal hole; and / or the photovoltaic module can withstand a mechanical load greater than or equal to 2400Pa.

13. A method for preparing a photovoltaic module, for preparing the photovoltaic module according to any one of claims 1 to 12, characterized in that: include: Providing a battery cell, wherein the battery cell is provided with an electrode component; Prepare a first string group and a second string group; each of the first string group and the second string group includes a plurality of battery strings spaced apart along a first direction; the battery strings include a plurality of battery cells spaced apart along a second direction; The first string group and the second string group are connected to form a battery unit by at least a first connector, the battery cell in the battery string near one end of the first connector is set as an aligned battery cell, and the electrode member on the aligned battery cell is connected to the first connector by a second connector; a first gap exists between two adjacent first connectors, and a second gap exists between two adjacent aligned battery cells; The battery cell is laid on a back plate, and a lead hole is provided on the back plate at a position corresponding to the first gap. The center line of the lead hole is staggered with the adjacent second gap along the first direction. The staggered means that the projection of the center line of the lead hole along the second direction does not overlap with the projection of the adjacent second gap along the second direction; and the difference between the distance from the center line of the lead hole to the second connector connected to one end of the first connector and the distance from the center line of the lead hole to the other second connector connected to the other end of the first connector is within a preset range.

14. The method for preparing a photovoltaic module according to claim 13, wherein: The preparation of the first and second string groups includes at least: arranging and connecting a plurality of the battery cells to form a first battery string, a second battery string, a third battery string, and a fourth battery string, respectively; and arranging a plurality of the first battery strings, the second battery strings, the third battery strings, and the fourth battery strings along the first direction and along the second direction to form the first and second string groups.

15. The method for preparing a photovoltaic module according to claim 14, characterized in that: The plurality of battery cells include a first battery cell and a second battery cell, and the electrode arrangement structures on the first battery cell and the second battery cell are opposite; and arranging and connecting the plurality of battery cells to form a first battery string, a second battery string, a third battery string, and a fourth battery string, respectively, includes: A plurality of the first battery cells and the second battery cells are connected to form the first battery string and the second battery string respectively, and the first battery string and the second battery string are arranged along a first direction; a plurality of the first battery cells and the second battery cells are connected to form the third battery string and the fourth battery string respectively, and the third battery string and the fourth battery string are arranged along the first direction.

16. The method for preparing a photovoltaic module according to claim 14, wherein: The plurality of battery cells include a first battery cell and a second battery cell, and the electrode arrangement structures on the first battery cell and the second battery cell are opposite; and arranging and connecting the plurality of battery cells to form a first battery string, a second battery string, a third battery string, and a fourth battery string, respectively, includes: A plurality of the first battery cells and the second battery cells are connected to form the first battery string and the third battery string respectively, and the first battery string and the third battery string are arranged along the second direction; a plurality of the first battery cells and the second battery cells are connected to form the second battery string and the fourth battery string respectively, and the second battery string and the fourth battery string are arranged along the second direction.

17. The method for preparing a photovoltaic module according to claim 15 or 16, characterized in that: The first battery cell is provided with first electrode components and second electrode components alternately arranged along the first direction, and the second battery cell is provided with second electrode components and first electrode components alternately arranged along the first direction.

18. The method for preparing a photovoltaic module according to claim 15 or 16, characterized in that: The number of cells in each battery string is an odd number or an even number.

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