Bus bar, solar cell module and photovoltaic system

Abstract

The utility model is suitable for the technical field of solar cells, and provides a bus bar, a solar cell module and a photovoltaic system, and the bus bar comprises a first main body part which comprises a first end and a second end which are oppositely arranged; the first connecting part is connected with the first end and extends from the first end to the second end; the second connecting part is connected with the second end and extends from the second end to the first end; a first lead portion connected to the first connection portion; the second lead part is connected with the second connecting part, the second lead part is bent in the direction away from the first main body part relative to the second connecting part, and the distance from the first lead part to the outer end of the first connecting part is larger than that from the second lead part to the outer end of the second connecting part. The bus bar provided by the utility model can reduce the risk of short circuit caused by lap joint of the lead part and the adjacent line, and can reduce the risk of breaking of the bus bar.

Description

Technical Field

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

[0002] Solar cells, also known as photovoltaic cells, are devices that directly convert light energy into direct current using the photovoltaic effect. In related technologies, multiple solar cells are connected in series, laminated, and encapsulated to form a solar module. A solar module consists of multiple cell strings. Busbars are typically located in the middle or at the edge of the module to weld the solder strips of two cell strings together, connecting them in parallel or series. The busbars are connected to a junction box.

[0003] In related technologies, to extract current from the cell strings of a solar cell module, the ends of the busbar are bent to form lead portions for insertion into junction boxes on the backplane. The busbar in these technologies includes a main body and two lead portions connected to one end of the main body and bent relative to it. These two lead portions are typically perpendicular to the edge of the main body and are connected to different junction boxes. Because the two lead portions are located at the edges of the main body, they are prone to short-circuiting with adjacent lines (such as opposite polarity solder strips on adjacent cell strings) due to their small distance, resulting in poor reliability of the solar cell module. Utility Model Content

[0004] This invention provides a busbar designed to solve the problem that the busbar of existing solar cell modules is prone to short circuits due to contact between the lead portion and adjacent lines, resulting in poor reliability of the solar cell module.

[0005] This invention is implemented by providing a busbar for a solar cell module, comprising:

[0006] A first main body portion, the first main body portion including a first end and a second end disposed opposite to each other;

[0007] A first connecting portion connected to the first end, the first connecting portion extending from the first end toward the second end;

[0008] A second connecting portion connected to the second end, the second connecting portion extending from the second end toward the first end;

[0009] A first lead portion connected to the first connecting portion is bent away from the first main body portion relative to the first connecting portion; and

[0010] The second lead portion is connected to the second connecting portion. The second lead portion is bent away from the first main body portion relative to the second connecting portion. The distance from the first lead portion to the outer end of the first connecting portion is greater than the distance from the second lead portion to the outer end of the second connecting portion.

[0011] Preferably, the first connecting portion includes:

[0012] The first bent portion connected to the first end; and

[0013] A first inclined portion is connected to the first bent portion, the first lead portion is connected to the first inclined portion, the first inclined portion is bent towards the first main body portion, the first inclined portion is inclined relative to the first main body portion, and a first cavity is formed between the first main body portion, the first bent portion, and the first inclined portion.

[0014] Preferably, the second connecting portion includes:

[0015] The second bend connected to the second end; and

[0016] The second inclined portion is connected to the second bent portion, the second lead portion is connected to the second inclined portion, the second inclined portion is bent towards the first main body portion, the second inclined portion is inclined relative to the first main body portion, and a second cavity is formed between the first main body portion, the second bent portion, and the second inclined portion.

[0017] Preferably, the first cavity is provided with a first support portion for supporting the first inclined portion on the first main body portion; and / or, the second cavity is provided with a second support portion for supporting the second inclined portion on the first main body portion.

[0018] Preferably, the first inclined portion and / or the second inclined portion are spaced apart from the first main body portion. Preferably, a portion of the first inclined portion contacts the first main body portion, and / or a portion of the second inclined portion contacts the first main body portion.

[0019] Preferably, the first inclined portion is spaced apart from the first main body portion; and / or, the second inclined portion is spaced apart from the first main body portion.

[0020] Preferred options also include:

[0021] The first contact portion, the first lead portion is connected to the first inclined portion through the first contact portion, and the first contact portion is in contact with the first main body portion.

[0022] Preferably, the first contact portion is arranged parallel to the first main body portion.

[0023] Preferred options also include:

[0024] The second contact portion is connected to the second inclined portion via the second contact portion, and the second contact portion is in contact with the first main body portion.

[0025] Preferably, the second contact portion is arranged parallel to the first main body portion.

[0026] Preferably, the distance from the first contact portion to the outer end of the first connecting portion is greater than the distance from the second contact portion to the outer end of the second connecting portion.

[0027] Preferably, both the first bend and the second bend are arc-shaped.

[0028] Preferably, the first bent portion and the second bent portion are arranged perpendicular to the first main body portion.

[0029] Preferred options also include:

[0030] The first arc-shaped portion, the first lead portion is connected to the first connecting portion through the first arc-shaped portion.

[0031] Preferred options also include:

[0032] The second arc-shaped portion, the second lead portion is connected to the second connecting portion through the second arc-shaped portion.

[0033] Preferably, the length of the first lead portion is less than the length of the second lead portion.

[0034] This utility model provides a solar cell module, comprising:

[0035] A plurality of battery string units are arranged at intervals along a second direction. Each battery string unit includes a first battery string and a second battery string arranged along a first direction. The second direction intersects with the first direction. Both the first battery string and the second battery string include a plurality of battery cells connected in series along the first direction.

[0036] Multiple busbars are provided, wherein the busbars are used to connect the first battery string and the second battery string of the battery string unit in parallel or to connect adjacent first battery strings or adjacent second battery strings in series, and at least one of the busbars is one of the above-mentioned busbars.

[0037] This utility model provides a solar cell module, comprising:

[0038] A plurality of battery string units are arranged at intervals along a second direction. Each battery string unit includes a first battery string and a second battery string arranged along a first direction. The second direction intersects with the first direction. Both the first and second battery strings include a plurality of battery cells connected in series along the first direction. Each battery string unit includes a first battery string unit, a second battery string unit, a third battery string unit, a fourth battery string unit, a fifth battery string unit, and a sixth battery string unit arranged at intervals along the second direction.

[0039] A plurality of intermediate busbars are arranged at intervals along the second direction. The intermediate busbars include a first intermediate busbar, a second intermediate busbar, a third intermediate busbar, and a fourth intermediate busbar arranged at intervals along the second direction. The first intermediate busbar is used to connect the first battery string and the second battery string of the first battery string unit in parallel. The second intermediate busbar is used to connect the first battery string and the second battery string of the second battery string unit and the third battery string unit in parallel. The third intermediate busbar is used to connect the first battery string and the second battery string of the fourth battery string unit and the fifth battery string unit in parallel. The fourth intermediate busbar is used to connect the first battery string and the second battery string of the sixth battery string unit in parallel.

[0040] The second intermediate busbar and the third intermediate busbar are the busbars described above, and the first lead portion of the second intermediate busbar is disposed close to the second lead portion of the third intermediate busbar.

[0041] Preferably, both the first intermediate busbar and the fourth intermediate busbar include:

[0042] The second main body includes a third end and a fourth end disposed opposite to each other;

[0043] A third connecting portion connected to the third end, the third connecting portion extending from the third end toward the fourth end; and

[0044] The third lead portion connected to the third connecting portion is bent away from the second main body portion relative to the third connecting portion;

[0045] The third lead portion of the first intermediate busbar is disposed close to the second lead portion of the second intermediate busbar, and the third lead portion of the fourth intermediate busbar is disposed close to the first lead portion of the third intermediate busbar.

[0046] Preferably, the distance from the third lead portion of the first intermediate busbar to the outer end of the third connecting portion, the distance from the first lead portion of the second intermediate busbar to the outer end of the first connecting portion of the second intermediate busbar, and the distance from the first lead portion of the third intermediate busbar to the outer end of the first connecting portion of the third intermediate busbar are equal.

[0047] The distance from the second lead portion of the second intermediate busbar to the outer end of the second connecting portion of the second intermediate busbar, the distance from the second lead portion of the third intermediate busbar to the outer end of the second connecting portion of the third intermediate busbar, and the distance from the third lead portion of the fourth intermediate busbar to the outer end of the third connecting portion of the fourth intermediate busbar are equal.

[0048] The distance from the third lead portion of the first intermediate busbar to the outer end of the third connecting portion is greater than the distance from the second lead portion of the second intermediate busbar to the outer end of the second connecting portion of the second intermediate busbar.

[0049] This invention also provides a photovoltaic system, including the aforementioned solar cell module.

[0050] This utility model provides a busbar with a first connecting portion and a second connecting portion. The first connecting portion extends from a first end to a second end, and the second connecting portion extends from a second end to a first end. This ensures that neither the first lead portion nor the second lead portion is located at the outermost edge of the first main body. This reduces the risk of short circuits caused by the first lead portion contacting adjacent lines, and also reduces the risk of short circuits caused by the second lead portion contacting adjacent lines, thus improving the operational reliability of the solar cell module. Simultaneously, since the distance from the first lead portion to the outer end of the first connecting portion is greater than the distance from the second lead portion to the outer end of the second connecting portion, the deformation space of the first lead portion on the first main body is increased, thereby improving the stress buffering effect of the first lead portion, facilitating stress release of the busbar, preventing breakage, and thus improving the structural reliability of the busbar. Furthermore, it increases the creepage distance between the first lead portion of the busbar and the second lead portion of adjacent busbars, improving the electrical isolation effect between the first lead portion of the busbar and the second lead portion of adjacent busbars, further enhancing the operational reliability of the solar cell module. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of the first type of busbar provided in Embodiment 1 of this utility model;

[0052] Figure 2 This is a schematic diagram of the structure of the second type of busbar provided in Embodiment 1 of this utility model;

[0053] Figure 3This is a schematic diagram of the structure of the third type of busbar provided in Embodiment 1 of this utility model;

[0054] Figure 4 This is a schematic diagram of the structure of the fourth type of busbar provided in Embodiment 1 of this utility model;

[0055] Figure 5 This is a plan view of the solar cell module provided in Embodiment 2 of this utility model;

[0056] Figure 6 yes Figure 5 Enlarged diagram of point IV in the middle;

[0057] Figure 7 This is a schematic diagram of the intermediate busbars of the solar cell module provided in Embodiment 2 of this utility model;

[0058] Figure 8 This is a schematic diagram of the first intermediate busbar of the solar cell module provided in Embodiment 2 of this utility model. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, and should not be construed as limiting the present utility model. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0060] In the description of this utility model, it should be understood that the terms "upper", "lower", "back", "front", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0063] Example 1

[0064] Please refer to Figure 1 This utility model provides a busbar for a solar cell module, comprising:

[0065] The first main body 21 includes a first end 211 and a second end 212 disposed opposite to each other;

[0066] A first connecting portion 30 is connected to the first end 211, and the first connecting portion 30 extends from the first end 211 toward the second end 212;

[0067] A second connecting portion 31 is connected to the second end 212, and the second connecting portion 31 extends from the second end 212 toward the first end 211;

[0068] The first lead portion 24, which is connected to the first connecting portion 30, is bent away from the first main body portion 21 relative to the first connecting portion 30; and

[0069] The second lead portion 34 is connected to the second connecting portion 31. The second lead portion 34 is bent away from the first main body portion 21 relative to the second connecting portion 31. The distance L1 from the first lead portion 24 to the outer end 220 of the first connecting portion 30 is greater than the distance L2 from the second lead portion 34 to the outer end 320 of the second connecting portion 31.

[0070] The busbar of this embodiment can be used as a middle busbar or an edge busbar of a solar cell module. The first lead portion 24 and the second lead portion 34 of the busbar are respectively inserted into the corresponding junction box of the solar cell module. The first main body portion 21 is generally straight, and the specific shapes of the first connecting portion 30 and the second connecting portion 31 are not limited; they can be formed by one or more bends. The structures of the first connecting portion 30 and the second connecting portion 31 can be the same or different.

[0071] In this embodiment of the present invention, the outer end 220 of the first connecting portion 30 is the end of the first connecting portion 30 furthest from the first lead portion 24 along the length Z of the first main body portion 21, and the outer end 320 of the second connecting portion 31 is the end furthest from the second lead portion 34 along the length Z of the first main body portion 21. The distance L1 from the first lead portion 24 to the outer end 220 of the first connecting portion 30 is the distance between the first lead portion 24 and the outer end 220 of the first connecting portion 30 along the length Z of the first main body portion 21, and the distance between the second lead portion 34 and the outer end 320 of the second connecting portion 31 is the distance between the second lead portion 34 and the outer end 320 of the second connecting portion 31 along the length Z of the first main body portion 21, and L1 is greater than L2. The outer end 220 of the first connecting portion 30 may or may not be flush with the first end 211. The outer end 320 of the second connecting portion 31 may or may not be flush with the second end 212.

[0072] This utility model provides a busbar that, by providing a first connecting portion 30 extending from a first end 211 towards a second end 212, ensures that the first lead portion 24 is not located at the outermost edge of the first main body portion 21, thereby reducing the risk of short circuits caused by the first lead portion 24 overlapping with adjacent lines (such as opposite polarity solder strips); by providing a second connecting portion 31 extending from the second end 212 towards the first end 211, ensures that the second lead portion 34 is not located at the outermost edge of the first main body portion 21, thereby reducing the risk of short circuits caused by the second lead portion 34 overlapping with adjacent lines (such as opposite polarity solder strips); simultaneously, because the first lead portion 24 to the first connecting portion... The distance L1 from the outer end 220 of the first lead 24 to the outer end 320 of the second connecting part 31 is greater than the distance L2 from the second lead 21 to the outer end 320 of the second connecting part 31. After the first lead 24 and the second lead 34 are respectively connected to the corresponding junction boxes, the deformation space of the first lead 24 can be increased, thereby improving the stress buffering effect of the first lead 24, which is conducive to the stress release of the busbar and avoids the breakage of the busbar, thereby improving the structural reliability of the busbar. Moreover, since L1 is greater than L2, the creepage distance between the first lead 24 of the busbar and the second lead 34 of the adjacent busbar can be increased, improving the electrical isolation effect between the first lead 24 of the busbar and the second lead 34 of the adjacent busbar, and improving the working reliability of the solar cell module.

[0073] In practical applications, the specific difference between the distance L1 from the first lead portion 24 to the outer end 220 of the first connecting portion 30 and the distance L2 from the second lead portion 34 to the outer end 320 of the second connecting portion 31 is not limited; preferably, the difference between L1 and L2 can be 0.1 to 1 mm. More preferably, the difference between L1 and L2 is 0.2 to 0.5 mm. For example, L1 is 1.8 mm and L2 is 1.5 mm; or, for example, L1 is 1.5 mm and L2 is 1.3 mm.

[0074] As one embodiment of this utility model, the first connecting part 30 includes:

[0075] The first bent portion 22 connected to the first end 211; and

[0076] The first inclined portion 23 is connected to the first bent portion 22, and the first lead portion 24 is connected to the first inclined portion 23. The first inclined portion 23 is bent towards the first main body portion 21. The first inclined portion 23 is inclined relative to the first main body portion 21. A first cavity 26 is formed between the first main body portion 21, the first bent portion 22, and the first inclined portion 23.

[0077] In this embodiment, due to the presence of the first bending portion 22 and the first tilting portion 23, the force generated by the first lead portion 24 during the lamination process of the solar cell module can be offset by the first bending portion 22 and the first tilting portion 23, preventing the end of the first main body portion 21 connected to the first lead portion 24 from lifting up, thereby ensuring the welding reliability of the solder strip to the first main body portion 21.

[0078] In this embodiment, the upper and lower surfaces of the first inclined portion 23 are two parallel planes. The first inclined portion 23 is inclined relative to the first main body portion 21, meaning that the length direction Z of the first inclined portion 23 and the first main body portion 21 are not parallel. This reduces the force transmitted from the first lead portion 24 to the first main body portion 21, preventing the end of the first main body portion 21 connected to the first lead portion 24 from lifting, thereby ensuring the welding reliability between the solder strip and the first main body portion 21. Furthermore, because the first inclined portion 23 is inclined relative to the first main body portion 21, the contact area between the first inclined portion 23 and the first main body portion 21 during the lamination process is reduced, providing a good buffering effect.

[0079] As an embodiment of this utility model, the second connecting part 31 includes:

[0080] The second bend 32 connected to the second end 212; and

[0081] The second inclined portion 33 is connected to the second bent portion 32, and the second lead portion 34 is connected to the second inclined portion 33. The second inclined portion 33 is bent towards the first main body portion 21. The second inclined portion 33 is inclined relative to the first main body portion 21, and a second cavity 36 is formed between the first main body portion 21, the second bent portion 32, and the second inclined portion 33.

[0082] In this embodiment, the second connecting part 31 is configured to include a second bending part 32 and a second inclined part 33. Since the second inclined part 33 is inclined relative to the first main body part 21, the first main body part 21, the second bending part 32 and the second inclined part 33 form a second cavity 36. The second cavity 36 plays a buffering role during the lamination process, which can prevent the second bending part 32 and the second inclined part 33 from being broken, thereby improving the reliability of the busbar structure.

[0083] In this embodiment, the outer end 220 of the first connecting portion 30 is specifically the end of the first bent portion 22 that is furthest from the first lead portion 24 along the length direction Z of the first main body portion 21, and the outer end 320 of the second connecting portion 31 is the end of the second bent portion 32 that is furthest from the second lead portion 34 along the length direction Z of the first main body portion 21.

[0084] As an embodiment of the present invention, the first cavity 26 is provided with a first support portion 27 for supporting the first inclined portion 23 on the first main body portion 21.

[0085] In this embodiment, by providing a first support portion 27 in the first cavity 26 and fixing the first support portion 27 in the first cavity 26, the first inclined portion 23 is supported on the first main body portion 21 by the first support portion 27, so that the inclined shape of the first inclined portion 23 is maintained during the lamination process of the solar cell module, and the first inclined portion 23 plays a good stress buffering role.

[0086] In one embodiment of this utility model, the first support portion 27 can be a conductive support portion or an insulating support portion. The hardness of the first support portion 27 is less than that of the first inclined portion 23, allowing the first support portion 27 to provide better cushioning. Furthermore, the specific structure of the first support portion 27 is not limited; it can be a plastic bracket or a metal spring.

[0087] As an embodiment of the present invention, the second cavity 36 is provided with a second support portion 37 for supporting the second inclined portion 33 on the first main body portion 21.

[0088] In this embodiment, by providing a second support portion 37 within the second cavity 36, the second support portion 37 supports the second inclined portion 33, thereby maintaining the good structure of the second cavity 36 during the lamination process of the solar cell module, thus enabling the second cavity 36 to play a good buffering role. The structure of the second support portion 37 can be the same as that of the first support portion 27. Of course, the structure of the second support portion 37 can also be different from that of the first support portion 27.

[0089] As an embodiment of the present invention, a portion of the first inclined portion 23 contacts the first main body portion 21, and / or a portion of the second inclined portion 33 contacts the first main body portion 21.

[0090] In this embodiment, a portion of the first inclined portion 23 may contact the first main body portion 21, or a portion of the second inclined portion 33 may contact the first main body portion 21. Alternatively, a portion of the first inclined portion 23 may contact the first main body portion 21, and a portion of the second inclined portion 33 may contact the first main body portion 21.

[0091] In this embodiment, since a portion of the first inclined portion 23 contacts the first main body portion 21, the first main body portion 21 can support a portion of the first inclined portion 23, preventing deformation of the first inclined portion 23 during lamination and maintaining its good shape. Specifically, the end of the first inclined portion 23 closest to the first lead portion 24 contacts the main body portion 21. Similarly, since a portion of the second inclined portion 33 contacts the first main body portion 21, the first main body portion 21 can support a portion of the second inclined portion 33, preventing deformation of the second inclined portion 33 during lamination and maintaining its good shape.

[0092] In another embodiment of the present invention, the first inclined portion 23 is spaced apart from the first main body portion 21; and / or, the second inclined portion 33 is spaced apart from the first main body portion 21.

[0093] In this embodiment, the first inclined portion 23 may be spaced apart from the first main body portion 21, or the second inclined portion 33 may be spaced apart from the first main body portion 21. Alternatively, the first inclined portion 23 may be spaced apart from the first main body portion 21, and the second inclined portion 33 may be spaced apart from the first main body portion 21.

[0094] In this embodiment, the first inclined portion 23 is completely out of contact with the main body portion 21, which increases the buffering effect of the first inclined portion 23 and further prevents the first bent portion 22 from breaking, thereby improving the reliability of the busbar structure. Similarly, the second inclined portion 33 is completely out of contact with the main body portion 21, which increases the buffering effect of the second inclined portion 33 and further prevents the second bent portion 32 from breaking, thereby improving the reliability of the busbar structure. In practical applications, the distance between the first inclined portion 23 and the second inclined portion 33 and the first main body portion 21 is not limited; for example, the distance between the first inclined portion 23 and the second inclined portion 33 and the main body portion 21 can be 0.05~0.1 mm.

[0095] Please refer to Figure 2 As one embodiment of this utility model, it also includes:

[0096] The first contact portion 28 and the first lead portion 24 are connected to the first inclined portion 23 through the first contact portion 28, and the first contact portion 28 is in contact with the first main body portion 21.

[0097] In this embodiment, the first inclined portion 23 and the first lead portion 24 are connected by the first contact portion 28. Since the first contact portion 28 is in contact with the first main body portion 21, the structural strength of the first main body portion 21 can be increased, the deformation of the first main body portion 21 during the lamination of the solar cell module can be avoided, and the reliability of the busbar during the lamination process can be improved.

[0098] In one embodiment of this utility model, the first contact portion 28 is arranged in parallel with the first main body portion 21.

[0099] In this embodiment, the first contact portion 28 is parallel to and attached to the first main body portion 21, and the length direction of the first contact portion 28 is the same as the length direction Z of the first main body portion 21. During the lamination process of the solar cell module, the first main body portion 21 supports the first contact portion 28, making the lamination process more reliable and facilitating the processing of the busbar. The first contact portion 28 is generally straight, meaning that the contact surfaces of the first contact portion 28 and the first main body portion 21 are parallel to each other.

[0100] As one embodiment of this utility model, it also includes:

[0101] The second contact portion 38 and the second lead portion 34 are connected to the second inclined portion 33 through the second contact portion 38, and the second contact portion 38 is in contact with the first main body portion 21.

[0102] In this embodiment, the second inclined portion 33 and the second lead portion 34 are connected by the second contact portion 38. Since the second contact portion 38 is in contact with the first main body portion 21, the structural strength of the first main body portion 21 can be increased, the deformation of the first main body portion 21 during the lamination process can be avoided, and the reliability of the lamination process can be improved.

[0103] In one embodiment of this utility model, the second contact portion 38 is arranged parallel to the first main body portion 21.

[0104] In this embodiment, the second contact portion 38 is parallel to and attached to the first main body portion 21. During the lamination process, the first main body portion 21 can support the second contact portion 38, making the lamination process more reliable and facilitating the processing of the busbar. The second contact portion 38 is generally straight.

[0105] In one embodiment of the present invention, the distance from the first contact portion 28 to the outer end 220 of the first connecting portion 30 is greater than the distance from the second contact portion 38 to the outer end 320 of the second connecting portion 31.

[0106] The distance from the first contact portion 28 to the outer end 220 of the first connecting portion 30 is the distance from the end of the first contact portion 28 near the first end 211 along the length direction Z of the first main body portion 21 to the outer end 220 of the first connecting portion 30. Similarly, the distance from the second contact portion 38 to the outer end 320 of the second connecting portion 31 is the distance from the end of the second contact portion 38 near the second end 212 along the length direction Z of the first main body portion 21 to the outer end 320 of the second connecting portion 31. Because the distance from the first contact portion 28 to the outer end 220 of the first connecting portion 30 is greater than the distance from the second contact portion 38 to the outer end 320 of the second connecting portion 31, the stress buffering effect of the first connecting portion 30 can be further improved, preventing the busbar from breaking.

[0107] Please refer to Figure 1 and Figure 2 In one embodiment of this utility model, the first bending portion 22 and the second bending portion 32 are arc-shaped. The outer surface contours of the first bending portion 22 and the second bending portion 32 are arc-shaped, and the inner surface contours of the first bending portion 22 and the second bending portion 32 are also arc-shaped. This reduces the stress at the connection points between the first inclined portion 23 and the first main body portion 21, and between the second inclined portion 33 and the first main body portion 21, preventing breakage at these points and improving the reliability of the busbar structure.

[0108] Please refer to Figure 3 As an embodiment of the present invention, the first bending portion 22 and the second bending portion 32 are straight, and the first bending portion 22 and the second bending portion 32 are arranged perpendicular to the first main body portion 21.

[0109] In this embodiment, the first bending portion 22 is straight and is arranged perpendicularly to the first main body portion 21, which facilitates the bending process of the first bending portion 22.

[0110] Please refer to Figure 1 , Figure 3 and Figure 4 As one embodiment of this utility model, the busbar further includes:

[0111] The first arc-shaped portion 25 and the first lead portion 24 are connected to the first connecting portion 30 through the first arc-shaped portion 25.

[0112] In this embodiment, the first lead portion 24 is connected to the first inclined portion 23 via the first arc-shaped portion 25. Due to the arrangement of the first arc-shaped portion 25, the first lead portion 24 can be prevented from being broken to a certain extent, thus improving the reliability of the busbar structure. Of course, the first lead portion 24 and the first inclined portion 23 can also be directly connected.

[0113] As one embodiment of this utility model, it also includes:

[0114] The second arc-shaped portion 35 and the second lead portion 34 are connected to the second connecting portion 31 through the second arc-shaped portion 35.

[0115] In this embodiment, the second arc-shaped portion 35 helps to reduce the bending force of the second lead portion 34 on the first main body portion 21, which can prevent the second lead portion 34 from being broken during the bending process and improve the reliability of the busbar structure.

[0116] In this embodiment, the outer surface contour of the second arc-shaped portion 35 is arc-shaped, and the inner surface contour of the second arc-shaped portion 35 is also arc-shaped. This arc shape can be a standard arc shape or a non-standard arc shape. That is, the outer surface contour of the second arc-shaped portion 35 can be an arc shape with a single radius or it can be formed by connecting multiple arc shapes with different radii. Of course, in some possible embodiments, the second arc-shaped portion 35 may not be necessary, and the second lead portion 34 and the second inclined portion 33 can be directly connected.

[0117] In one embodiment of this utility model, the length of the first lead portion 24 is less than the length of the second lead portion 34. In this embodiment, the length of the first lead portion 24 is the distance from the end of the first lead portion 24 away from the first main body portion 21 to the end of the first lead portion 24 close to the first main body portion 21, and the length of the second lead portion 34 is the distance from the end of the second lead portion 34 away from the first main body portion 21 to the end of the second lead portion 34 close to the first main body portion 21.

[0118] In this embodiment, the length of the first lead portion 24 is less than the length of the second lead portion 34, which can increase the creepage distance between the first lead portion 24 and the second lead portion 34 of adjacent busbars, increase the isolation effect between the first lead portion 24 and the second lead portion 34 of adjacent busbars, and improve the working reliability of the solar cell module.

[0119] Please refer to Figures 1-3 As an embodiment of the present invention, the first inclined portion 23 and the first main body portion 21 form a first included angle A1, the first included angle A1 being 2°~60°.

[0120] In this embodiment, under the premise that the first inclined part 23 is inclined relative to the first main body part 21, the angle between the first inclined part 23 and the first main body part 21 is controlled to be 2°~60°. This allows the angle A1 between the first inclined part 23 and the first main body part 21 to be set within a more suitable range, which can effectively prevent the first inclined part 23 from breaking and prevent the first main body part 21 from warping and causing poor welding.

[0121] In one embodiment of the present invention, the second inclined portion 33 and the first main body portion 21 form a second included angle A2, and the first included angle A1 is smaller than the second included angle A2.

[0122] In this embodiment, the first included angle A1 is smaller than the second included angle A2, that is, the included angle between the first inclined portion 23 and the first main body portion 21 is smaller than the included angle between the second inclined portion 33 and the first main body portion 21, so that the inclination angles of the second inclined portion 33 and the first inclined portion 23 are different, which facilitates the assembly and connection between the busbar and the junction box; moreover, the first included angle A1 is smaller than the second included angle A2, which helps to increase the distance from the first lead portion 24 to the outer end of the first bending portion 22, thereby improving the buffering effect of the first lead portion 24, which is conducive to stress release of the busbar and can reduce the risk of busbar breakage.

[0123] In one embodiment of this utility model, the second included angle A2 is 3°~62°.

[0124] In this embodiment, controlling the second included angle A2 to be 3°~62° allows the included angle A2 between the second inclined part 33 and the first main body part 21 to be set within a more suitable range, which can effectively prevent the second inclined part 33 from breaking and prevent the first main body part 21 from warping, resulting in poor welding.

[0125] Please refer to Figure 4 In another embodiment of this utility model, the first connecting part 30 includes:

[0126] The first arc segment 301 connected to the first end 211; and

[0127] The first straight section 302 is connected to the first arc section 301, the first lead section 24 is connected to the first straight section 23, and both the first arc section 301 and the first straight section 302 are attached to the first main body section 21.

[0128] In this embodiment, the first connecting part 30 is configured to include a first arc segment 301 and a first straight segment 302. The first arc segment 301 and the first straight segment 302 are both attached to the first main body part 21. The first main body part 21 fully supports the first arc segment 301 and the first straight segment 302, which facilitates the lamination process of the solar cell module.

[0129] As an embodiment of this utility model, the second connecting part 31 includes:

[0130] The second arc segment 311 connected to the second end 212; and

[0131] The second straight section 312 is connected to the second arc section 311, and the second lead part 34 is connected to the second straight section 312. Both the second arc section 311 and the second straight section 312 are attached to the first main body part 21.

[0132] In this embodiment, the outer end 220 of the first connecting portion 30 is the end of the first arc segment 301 that is furthest from the first lead portion 24 along the length direction Z of the first main body portion 21, and the second connecting portion 31 is the end of the second arc segment 311 that is furthest from the second lead portion 34 along the length direction Z of the first main body portion 21.

[0133] In this embodiment, the second connecting part 31 is configured to include a second arc segment 311 and a second straight segment 312. Both the second arc segment 311 and the second straight segment 312 are attached to the first main body part 21. The first main body part 21 fully supports the second arc segment 311 and the second straight segment 312, which facilitates the lamination process of the solar cell module.

[0134] Example 2

[0135] Please see Figures 5-6 This utility model provides a solar cell module 100, which includes a plurality of solar cells 110. The solar cells 110 can be back contact solar cells, Topcon solar cells, or other types, and are not limited here.

[0136] like Figure 5 As shown, the solar cell module 100 includes:

[0137] A plurality of battery string units 10 are arranged at intervals along a second direction X. Each battery string unit 10 includes a first battery string 11 and a second battery string 12 arranged along a first direction Y. The second direction X intersects with the first direction Y. Both the first battery string 11 and the second battery string 12 include a plurality of battery cells 110 connected in series along the first direction Y.

[0138] Multiple busbars are used to connect the first battery string 11 and the second battery string 12 of the battery string unit 10 in parallel or to connect adjacent first battery strings 11 or adjacent second battery strings 12 in series. At least one busbar is the busbar of the above embodiment 1.

[0139] In practical applications, multiple busbars may include a middle busbar 20, a first edge busbar 40, and a second edge busbar 50. The middle busbar 20 is located between the first battery string 11 and the second battery string 12. The middle busbar 20 is used to connect the first battery string 11 and the second battery string 12 of the battery string unit 10 in parallel. The first edge busbar 40 is used to connect the first battery string 11 of the adjacent battery string unit 10 in series. The second edge busbar 50 is used to connect the second battery string 12 of the adjacent battery string unit 10 in series.

[0140] Specifically, the solar cell module 100 also includes a plurality of intermediate busbars 20 arranged sequentially at intervals along the second direction X. The intermediate busbars 20 are used to connect the first battery string 11 and the second battery string 12 of each battery string unit 10 in parallel. At least one intermediate busbar 20 is the busbar of the above embodiment 1.

[0141] Furthermore, among the multiple intermediate busbars 20, the intermediate busbar 20 located in the middle position is the busbar of the above embodiment 1, and the intermediate busbar 20 located at the edge position is a busbar of other structures.

[0142] In this embodiment of the invention, multiple solar cells 110 in the solar cell module 100 can be connected in series to form multiple cell strings. These cell strings can be combined in series and parallel to achieve current collection and output. For example, the connection between the individual solar cells 110 can be achieved by welding solder strips, and the series and parallel connections between the cell strings can be achieved by a central busbar 20, a first edge busbar 40, and a second edge busbar 50. The cell strings can form a solar cell array, which is then encapsulated together with a front panel, a front encapsulant film, a rear encapsulant film, and a back panel to form the solar cell module 100.

[0143] like Figure 5 and Figure 6 As shown, the solar cell module 100 also includes a junction box 300. An intermediate busbar 20 is used to connect the first battery string 11 and the second battery string 12 in parallel. That is, both the first battery string 11 and the second battery string 12 are connected to the intermediate busbar 20, and the polarities of the first battery string 11 and the second battery string 12 are the same. The junction box 300 is disposed on the back panel of the solar cell module 100, and a bypass diode is provided inside the junction box 300.

[0144] At least one intermediate busbar 20 in the solar cell module of this utility model embodiment is the busbar of the above embodiment one. It can reduce the risk of short circuit caused by the intermediate busbar 20 overlapping with adjacent lines (such as opposite polarity solder strips), and can ensure the welding reliability of the solder strip and the main body 21 during the lamination process of the solar cell module. It can also prevent the intermediate busbar 20 from being broken, thereby improving the structural reliability of the intermediate busbar 20 and improving the reliability of the solar cell module.

[0145] like Figure 5As shown, in the solar cell module 100, the solar cell module 100 may have multiple battery string units 10, which are arranged along a second direction X. The first direction Y may be the longitudinal direction of the solar cell module 100, and the second direction X may be the transverse direction of the solar cell module 100. In the multiple battery string units 10, adjacent first battery strings 11 are connected in pairs via first edge busbars 40, and adjacent second battery strings 12 are connected in pairs via second edge busbars 50. Adjacent first battery strings 11 not connected by the first edge busbars 40 are connected in pairs via intermediate busbars 20, and adjacent second battery strings 12 not connected by the second edge busbars 50 are connected in pairs via intermediate busbars 20. In some embodiments, the first battery strings 11 and the second battery strings 12 may be symmetrical about the centerline of the solar cell module 100 in the first direction Y.

[0146] Specifically, Figure 5 The diagram shows a case where the number of battery string units 10 is six, meaning that the battery string unit 10 includes a first battery string unit 101, a second battery string unit 102, a third battery string unit 103, a fourth battery string unit 104, a fifth battery string unit 105, and a sixth battery string unit 106 arranged sequentially at intervals along the second direction X. In this case, as... Figure 5 and Figure 6 As shown, there are 3 first edge busbars 40, 3 second edge busbars 50, 4 intermediate busbars 20, and 3 junction boxes 300. A junction box 300 is provided between each pair of adjacent intermediate busbars 20. In each pair of adjacent intermediate busbars 20, one busbar 20 is connected to the positive terminal of the junction box 300, and the other is connected to the negative terminal of the junction box 300. Figure 5 and Figure 6 As shown, among the four intermediate busbars 20, the two intermediate busbars 20 located at the two edges of the second direction X are short intermediate busbars, and the two intermediate busbars 20 located in the middle are long intermediate busbars. The short intermediate busbars are connected to the positive or negative terminal of a junction box 300 at only one end, while the long intermediate busbars are connected to the positive terminal of a junction box 300 at one end and to the negative terminal of another junction box 300 at the other end.

[0147] Please refer to Figures 5-7As an embodiment of this utility model, the battery string unit 10 includes a first battery string unit 101, a second battery string unit 102, a third battery string unit 103, a fourth battery string unit 104, a fifth battery string unit 105, and a sixth battery string unit 106 arranged sequentially at intervals along the second direction X; the intermediate bus bar 20 includes a first intermediate bus bar 201, a second intermediate bus bar 202, a third intermediate bus bar 203, and a fourth intermediate bus bar 204 arranged sequentially at intervals along the second direction X. Busbar 201 connects the first battery string 11 and the second battery string 12 of the first battery string unit 101 in parallel; the second intermediate busbar 202 connects the first battery string 11 and the second battery string 12 of the second battery string unit 102 and the third battery string unit 103 in parallel; the third intermediate busbar 203 connects the first battery string 11 and the second battery string 12 of the fourth battery string unit 104 and the fifth battery string unit 105 in parallel; and the fourth intermediate busbar 204 connects the first battery string 11 and the second battery string 12 of the sixth battery string unit 106 in parallel.

[0148] The second intermediate busbar 202 and the third intermediate busbar 203 are the busbars of the above embodiment 1; the first lead portion 24 of the second intermediate busbar 202 is disposed close to the second lead portion 34 of the third intermediate busbar 203.

[0149] In this embodiment, the second intermediate busbar 202 and the third intermediate busbar 203 in the solar cell module are configured as the busbars in the first embodiment described above. This reduces the risk of short circuits caused by the second intermediate busbar 202 and the third intermediate busbar 203 overlapping with adjacent lines (e.g., opposite polarity solder strips). It also ensures the welding reliability of the solder strips to the second intermediate busbar 202 and the third intermediate busbar 203 during the lamination process of the solar cell module. Furthermore, it prevents the second intermediate busbar 202 and the third intermediate busbar 203 from being broken, thereby improving the structural reliability of the second intermediate busbar 202 and the third intermediate busbar 203 and improving the reliability of the solar cell module.

[0150] Please refer to the reference. Figure 8 As an embodiment of this utility model, both the first intermediate busbar 201 and the fourth intermediate busbar 204 include:

[0151] The second main body 51 includes a third end 511 and a fourth end 512 disposed opposite to each other.

[0152] A third connecting portion 52 is connected to the third end 511, and the third connecting portion 52 extends from the third end 511 toward the fourth end 512; and

[0153] The third lead portion 54, which is connected to the third connecting portion 52, is bent away from the second main body portion 51 relative to the third connecting portion 52.

[0154] The third lead portion 54 of the first intermediate busbar 201 is disposed near the second lead portion 34 of the second intermediate busbar 202, the third lead portion 54 of the fourth intermediate busbar 204 is disposed near the first lead portion 24 of the third intermediate busbar 203, and the first lead portion 24 of the second intermediate busbar 202 is disposed near the second lead portion 34 of the third intermediate busbar 203.

[0155] In this embodiment, the first intermediate busbar 201 and the fourth intermediate busbar 204 have the same structure, and each has only one lead portion. By providing a third lead portion 54, the first intermediate busbar 201 and the fourth intermediate busbar 204 are not located at the outermost edge of the second main body 51, thereby reducing the risk of short circuit caused by the third lead portion 54 overlapping with adjacent lines.

[0156] As one embodiment of this utility model, the third connecting part 52 includes:

[0157] The third bend 521 connected to the third end 511; and

[0158] The third inclined portion 522 is connected to the third bending portion 32, and the third lead portion 54 is connected to the third inclined portion 522. The third inclined portion 522 is bent towards the second main body portion 51. The third inclined portion 522 is inclined relative to the second main body portion 51. A third cavity 56 is formed between the second main body portion 51, the third bending portion 521, and the third inclined portion 522.

[0159] In this embodiment, the third connecting part 52 is configured to include a third bending part 521 and a third inclined part 522. Since the third inclined part 522 is inclined relative to the second main body part 51, the third cavity 56 formed between the second main body part 51, the third bending part 521, and the third inclined part 522 plays a buffering role during the lamination process, which can prevent the third bending part 521 and the third inclined part 522 from being broken, thereby improving the structural reliability of the first intermediate busbar 201 and the fourth intermediate busbar 204.

[0160] Please refer to this again. Figure 7 As an embodiment of the present utility model, the distance S1 from the third lead portion 54 of the first intermediate busbar 201 to the outer end of the third connecting portion 52, the distance S2 from the first lead portion 24 of the second intermediate busbar 202 to the outer end of the first connecting portion 30 of the second intermediate busbar 202, and the distance S3 from the first lead portion 24 of the third intermediate busbar 203 to the outer end of the first connecting portion 30 of the third intermediate busbar 203 are equal;

[0161] The distance S4 from the second lead portion 34 of the second intermediate busbar 202 to the outer end of the second connecting portion 31 of the second intermediate busbar 202, the distance S5 from the second lead portion 34 of the third intermediate busbar 203 to the outer end of the second connecting portion 31 of the third intermediate busbar 203, and the distance S6 from the third lead portion 54 of the fourth intermediate busbar 204 to the outer end of the third lead portion 54 of the fourth intermediate busbar 204 are equal;

[0162] The distance S1 from the third lead portion 54 of the first intermediate busbar 201 to the outer end of the third connecting portion 52 is greater than the distance S4 from the second lead portion 34 of the second intermediate busbar 202 to the outer end of the second connecting portion 31 of the second intermediate busbar 202.

[0163] In this embodiment, the distances from the third lead portion 54 of the first intermediate busbar 201 to the outer end of the third connecting portion 52, the distances from the first lead portion 24 of the second intermediate busbar 202 to the outer end of the first connecting portion 30 of the second intermediate busbar 202, and the distances from the first lead portion 24 of the third intermediate busbar 203 to the outer end of the first connecting portion 30 of the third intermediate busbar 203 are respectively S1, S2, and S3; the distances from the second lead portion 34 of the second intermediate busbar 202 to the outer end of the second intermediate busbar 203 are respectively S1, S2, and S3. The distances from the outer end of the second connecting portion 31 of the third intermediate busbar 202, the distances from the second lead portion 34 of the third intermediate busbar 203 to the outer end of the second connecting portion 31 of the third intermediate busbar 203, and the distances from the third lead portion 54 of the fourth intermediate busbar 204 to the outer end of the third connecting portion 52 of the fourth intermediate busbar 204 are S4, S5, and S6, respectively. Wherein, S1, S2, and S3 are all equal, S4, S5, and S6 are all equal, and S1, S2, and S3 are all greater than S4, S5, and S6. The difference between S1 and S4 can be 0.1 to 1 mm, that is, the differences between S1 and S4, S2 and S5, and S3 and S6 are all 0.1 to 1 mm.

[0164] In this embodiment, the junction box 300 includes a first junction box 3001, a second junction box 3002, and a third junction box 3003. The third lead portion 54 of the first intermediate busbar 201 and the second lead portion 34 of the second intermediate busbar 202 are inserted into the first junction box 3001. The first lead portion 24 of the second intermediate busbar 202 and the second lead portion 34 of the third intermediate busbar 203 are inserted into the second junction box 3002. The first lead portion 24 of the third intermediate busbar 203 and the third lead portion 54 of the fourth intermediate busbar 204 are inserted into the third junction box 3003. Since S1 is greater than S4, the deformation buffer space of the third lead portion 54 of the first intermediate busbar 201 can be increased, improving the stress buffering effect of the first lead portion 24 of the first intermediate busbar 201. This facilitates stress release after the first lead portion 24 of the first intermediate busbar 201 and the second lead portion 34 of the second intermediate busbar 202 are inserted into the first junction box 3001, reducing the risk of breakage of the first intermediate busbar 201 and the second intermediate busbar 202. Furthermore, it can increase the creepage distance between the third lead portion 54 of the first intermediate busbar 201 and the second lead portion 34 of the second intermediate busbar 202, increasing the electrical isolation effect between the third lead portion 54 of the first intermediate busbar 201 and the second lead portion 34 of the second intermediate busbar 202, and improving the operational reliability of the solar cell module.

[0165] When the first lead portion 24 of the second intermediate busbar 202 and the second lead portion 34 of the third intermediate busbar 203 are inserted into the second junction box 3002, and S2 is greater than S5, the deformation buffer space of the first lead portion 24 of the second intermediate busbar 202 can be increased, the stress buffering effect of the first lead portion 24 of the second intermediate busbar 202 can be improved, the breakage of the second intermediate busbar 202 and the third intermediate busbar 203 can be avoided, and the electrical isolation effect between the first lead portion 24 of the second intermediate busbar 202 and the second lead portion 34 of the third intermediate busbar 203 can be increased, thereby improving the working stability of the solar cell module.

[0166] The first lead portion 24 of the third intermediate busbar 203 and the third lead portion 54 of the fourth intermediate busbar 204 are inserted into the third junction box 3003, and S3 is greater than S6. This can increase the deformation buffer space of the first lead portion 24 of the third intermediate busbar 203, improve the stress buffering effect of the first lead portion 24 of the third intermediate busbar 203, reduce the risk of breakage of the third intermediate busbar 203 and the fourth intermediate busbar 204, and increase the electrical isolation effect between the first lead portion 24 of the third intermediate busbar 203 and the third lead portion 54 of the fourth intermediate busbar 204, thereby improving the working stability of the solar cell module.

[0167] Of course, in some other embodiments, the distance S1 from the third lead portion 54 of the first intermediate busbar 201 to the outer end of the third connecting portion 52 may be less than the distance S4 from the second lead portion 34 of the second intermediate busbar 202 to the outer end of the second connecting portion 31 of the second intermediate busbar 202. That is, S1, S2, and S3 are all equal, S4, S5, and S6 are all equal, and S1, S2, and S3 are all less than S4, S5, and S6. Similarly, the difference between S4 and S1 can be 0.1 to 1 mm, that is, the difference between S4 and S1, the difference between S5 and S2, and the difference between S6 and S3 are all 0.1 to 1 mm.

[0168] Example 3

[0169] This utility model embodiment also provides a photovoltaic system, which includes the solar cell module of the above embodiment. It should be noted that the photovoltaic system has the same or similar beneficial effects as the solar cell module described above, and the related parts between the two can be referred to each other. To avoid repetition, they will not be described again here.

[0170] In this embodiment, the photovoltaic system can be applied in photovoltaic power plants, such as ground-mounted power plants, rooftop power plants, and floating power plants. It can also be applied to equipment or devices that utilize solar energy to generate electricity, such as user solar power supplies, solar streetlights, solar cars, and solar buildings. Of course, it is understood that the application scenarios of the photovoltaic system are not limited to these; that is, the photovoltaic system can be applied in all fields that require solar energy to generate electricity. Taking a photovoltaic power generation system grid as an example, the photovoltaic system may include a photovoltaic array, a combiner box, and an inverter. The photovoltaic array may be an array combination of multiple back-contact solar cell modules. For example, multiple back-contact solar cell modules can form multiple photovoltaic arrays. The photovoltaic array is connected to the combiner box, which can collect the current generated by the photovoltaic array. The collected current flows through the inverter and is converted into AC power required by the mains power grid before being connected to the mains power grid to achieve solar power supply.

[0171] In the description of this specification, the references to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0172] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A busbar for use in a solar cell module, characterized in that, include: A first main body portion, the first main body portion including a first end and a second end disposed opposite to each other; A first connecting portion connected to the first end, the first connecting portion extending from the first end toward the second end; A second connecting portion connected to the second end, the second connecting portion extending from the second end toward the first end; A first lead portion connected to the first connecting portion is bent away from the first main body portion relative to the first connecting portion; and The second lead portion is connected to the second connecting portion. The second lead portion is bent away from the first main body portion relative to the second connecting portion. The distance from the first lead portion to the outer end of the first connecting portion is greater than the distance from the second lead portion to the outer end of the second connecting portion.

2. The busbar according to claim 1, characterized in that, The first connecting part includes: The first bent portion connected to the first end; and A first inclined portion is connected to the first bent portion, the first lead portion is connected to the first inclined portion, the first inclined portion is bent towards the first main body portion, the first inclined portion is inclined relative to the first main body portion, and a first cavity is formed between the first main body portion, the first bent portion, and the first inclined portion.

3. The busbar according to claim 2, characterized in that, The second connecting part includes: The second bend connected to the second end; and The second inclined portion is connected to the second bent portion, the second lead portion is connected to the second inclined portion, the second inclined portion is bent towards the first main body portion, the second inclined portion is inclined relative to the first main body portion, and a second cavity is formed between the first main body portion, the second bent portion, and the second inclined portion.

4. The busbar according to claim 3, characterized in that, The first cavity is provided with a first support portion for supporting the first inclined portion on the first main body portion; and / or, the second cavity is provided with a second support portion for supporting the second inclined portion on the first main body portion.

5. The busbar according to claim 3, characterized in that, A portion of the first inclined portion contacts the first main body portion, and / or a portion of the second inclined portion contacts the first main body portion.

6. The busbar according to claim 3, characterized in that, The first inclined portion is spaced apart from the first main body portion; and / or, the second inclined portion is spaced apart from the first main body portion.

7. The busbar according to claim 3, characterized in that, Also includes: The first contact portion, the first lead portion is connected to the first inclined portion through the first contact portion, and the first contact portion is in contact with the first main body portion.

8. The busbar according to claim 7, characterized in that, The first contact portion is arranged parallel to the first main body portion.

9. The busbar according to claim 7, characterized in that, Also includes: The second contact portion is connected to the second inclined portion via the second contact portion, and the second contact portion is in contact with the first main body portion.

10. The busbar according to claim 9, characterized in that, The second contact portion is arranged parallel to the first main body portion.

11. The busbar according to claim 9, characterized in that, The distance from the first contact portion to the outer end of the first connecting portion is greater than the distance from the second contact portion to the outer end of the second connecting portion.

12. The busbar according to claim 3, characterized in that, Both the first bend and the second bend are arc-shaped.

13. The busbar according to claim 3, characterized in that, The first bent portion and the second bent portion are arranged perpendicular to the first main body portion.

14. The busbar according to claim 1, characterized in that, Also includes: The first arc-shaped portion, the first lead portion is connected to the first connecting portion through the first arc-shaped portion.

15. The busbar according to claim 1, characterized in that, Also includes: The second arc-shaped portion, the second lead portion is connected to the second connecting portion through the second arc-shaped portion.

16. The busbar according to claim 1, characterized in that, The length of the first lead portion is less than the length of the second lead portion.

17. A solar cell module, characterized in that, include: A plurality of battery string units are arranged at intervals along a second direction. Each battery string unit includes a first battery string and a second battery string arranged along a first direction. The second direction intersects with the first direction. Both the first battery string and the second battery string include a plurality of battery cells connected in series along the first direction. and Multiple busbars are provided, wherein the busbars are used to connect the first battery string and the second battery string of the battery string unit in parallel or to connect adjacent first battery strings or adjacent second battery strings in series, and at least one of the busbars is a busbar as described in any one of claims 1 to 16.

18. A solar cell module, characterized in that, include: A plurality of battery string units are arranged at intervals along a second direction. Each battery string unit includes a first battery string and a second battery string arranged along a first direction. The second direction intersects with the first direction. Both the first and second battery strings include a plurality of battery cells connected in series along the first direction. Each battery string unit includes a first battery string unit, a second battery string unit, a third battery string unit, a fourth battery string unit, a fifth battery string unit, and a sixth battery string unit arranged at intervals along the second direction. A plurality of intermediate busbars are arranged at intervals along the second direction. The intermediate busbars include a first intermediate busbar, a second intermediate busbar, a third intermediate busbar, and a fourth intermediate busbar arranged at intervals along the second direction. The first intermediate busbar is used to connect the first battery string and the second battery string of the first battery string unit in parallel. The second intermediate busbar is used to connect the first battery string and the second battery string of the second battery string unit and the third battery string unit in parallel. The third intermediate busbar is used to connect the first battery string and the second battery string of the fourth battery string unit and the fifth battery string unit in parallel. The fourth intermediate busbar is used to connect the first battery string and the second battery string of the sixth battery string unit in parallel. Wherein, the second intermediate busbar and the third intermediate busbar are busbars as described in any one of claims 1 to 16, and the first lead portion of the second intermediate busbar is disposed close to the second lead portion of the third intermediate busbar.

19. The solar cell module according to claim 18, characterized in that, Both the first intermediate bus bar and the fourth intermediate bus bar include: The second main body includes a third end and a fourth end disposed opposite to each other; A third connecting portion connected to the third end, the third connecting portion extending from the third end toward the fourth end; and The third lead portion connected to the third connecting portion is bent away from the second main body portion relative to the third connecting portion; The third lead portion of the first intermediate busbar is disposed close to the second lead portion of the second intermediate busbar, and the third lead portion of the fourth intermediate busbar is disposed close to the first lead portion of the third intermediate busbar.

20. The solar cell module according to claim 19, characterized in that, The distance from the third lead portion of the first intermediate busbar to the outer end of the third connecting portion, the distance from the first lead portion of the second intermediate busbar to the outer end of the first connecting portion of the second intermediate busbar, and the distance from the first lead portion of the third intermediate busbar to the outer end of the first connecting portion of the third intermediate busbar are equal. The distance from the second lead portion of the second intermediate busbar to the outer end of the second connecting portion of the second intermediate busbar, the distance from the second lead portion of the third intermediate busbar to the outer end of the second connecting portion of the third intermediate busbar, and the distance from the third lead portion of the fourth intermediate busbar to the outer end of the third connecting portion of the fourth intermediate busbar are equal. The distance from the third lead portion of the first intermediate busbar to the outer end of the third connecting portion is greater than the distance from the second lead portion of the second intermediate busbar to the outer end of the second connecting portion of the second intermediate busbar.

21. A photovoltaic system, characterized in that, Includes the solar cell module according to any one of claims 17 to 20.

Images