Photovoltaic module

Abstract

The utility model discloses a photovoltaic module which comprises a first battery piece and a second battery piece which are arranged adjacently, the first battery piece is a slice battery and is provided with a cut end, and the cut end is an edge end where a slice section is located; the second battery piece is a slice battery or a non-slice battery and is provided with a non-cut end, and the non-cut end is an edge end without a slice section; the non-cut end of the second battery piece is overlapped with the cut end of the first battery piece, the non-cut end is arranged on the light receiving side of the photovoltaic module, and the cut end is arranged on the non-light receiving side of the photovoltaic module. According to the photovoltaic module provided by the utility model, the non-cut end of the second battery piece is overlapped with the cut end of the first battery piece, and the non-cut end is positioned on the light receiving side of the photovoltaic module, so that the power loss caused by the existence of the cut end is reduced, and the power of the photovoltaic module is improved.

Description

Technical Field

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

[0002] In related technologies, to reduce the power loss of the module caused by current loss on the solder ribbon, photovoltaic modules are often manufactured by cutting the cells in half and then connecting them in series and parallel to keep the total current of the photovoltaic module constant. However, the current of a single cell is only half that of the whole cell. Although the electrical loss on the solder ribbon is reduced, the efficiency of the photovoltaic module will also decrease due to the damage caused by the cutting of the cell. For example, each cut of the cell reduces the efficiency of the photovoltaic module by 0.1% to 0.3%, which will lead to a power loss of 3W to 5W. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a photovoltaic module that helps reduce power loss caused by the presence of cut-out ends and improves the power output of the photovoltaic module.

[0004] A photovoltaic module according to a first aspect of the present invention includes: a first solar cell and a second solar cell arranged adjacent to each other, wherein the first solar cell is a sliced ​​solar cell with a cut-out end, the cut-out end being the edge end where the slice cross-section is located; the second solar cell is a sliced ​​solar cell or a non-sliced ​​solar cell with a non-cut-out end, the non-cut-out end being the edge end without a slice cross-section; the non-cut-out end of the second solar cell is superimposed on the cut-out end of the first solar cell, and the non-cut-out end is located on the light-receiving side of the photovoltaic module, while the cut-out end is located on the non-light-receiving side of the photovoltaic module.

[0005] According to the photovoltaic module of this utility model embodiment, the non-cut end of the second cell is stacked with the cut end of the first cell, wherein the non-cut end is located on the light-receiving side of the photovoltaic module, which helps to reduce the power loss caused by the presence of the cut end and improve the power of the photovoltaic module.

[0006] According to some embodiments of the present invention, along the arrangement direction from the first battery cell to the second battery cell, the width of the overlapping area of ​​the first battery cell and the second battery cell is W, wherein W satisfies: 0.1mm≤W≤1.5mm.

[0007] According to some embodiments of the present invention, the side of the first battery cell facing the light-receiving side includes a first grid line area, and the side of the second battery cell facing the light-receiving side includes a second grid line area. Along the arrangement direction from the first battery cell to the second battery cell, the minimum distance between the second grid line area and the non-cut end is less than the minimum distance between the first grid line area and the cut end.

[0008] According to some embodiments of the present invention, the cut end of the first battery cell is provided with a passivation film.

[0009] According to some embodiments of the present invention, the first battery cell and the second battery cell are connected by an interconnection structure.

[0010] According to some embodiments of the present invention, the interconnection structure includes: a first connecting segment connected to the light-receiving side of the first battery cell; a second connecting segment connected to the non-light-receiving side of the second battery cell; and a third connecting segment connected between the first connecting segment and the second connecting segment, at least a portion of the third connecting segment being located in the overlapping area of ​​the first battery cell and the second battery cell, the thickness of the third connecting segment being less than the thickness of the first connecting segment, and the thickness of the third connecting segment being less than the thickness of the second connecting segment.

[0011] According to some embodiments of the present invention, the thickness of the first connecting segment is T1, wherein T1 satisfies: 0.1mm≤T1≤0.35mm; and / or the thickness of the second connecting segment is T2, wherein T2 satisfies: 0.1mm≤T2≤0.35mm; and / or the thickness of the third connecting segment is T3, wherein T3 satisfies: 0.05mm≤T3≤0.15mm.

[0012] According to some embodiments of the present invention, along the arrangement direction from the first battery cell to the second battery cell, the length of the third connecting segment is greater than the width of the stacked area of ​​the first battery cell and the second battery cell.

[0013] According to some embodiments of the present invention, along the arrangement direction from the first battery cell to the second battery cell, the width of the stacked area of ​​the first battery cell and the second battery cell is W, and the length of the third connecting segment is L, wherein W and L satisfy: 2≤L / W≤4.

[0014] According to some embodiments of the present invention, the interconnection structure is connected to the non-light-receiving side surfaces of the first and second battery cells.

[0015] According to some embodiments of the present invention, the interconnection structure includes a fourth connecting segment, a fifth connecting segment, and a sixth connecting segment. The fourth connecting segment and the fifth connecting segment are respectively connected to the non-light-receiving surfaces of the first battery cell and the second battery cell, and the sixth connecting segment connects the fourth connecting segment and the fifth connecting segment.

[0016] According to some embodiments of the present invention, multiple battery packs are provided, each battery pack including a first battery cell and a second battery cell connected by the interconnection structure, wherein, along the arrangement direction from the first battery cell to the second battery cell, the minimum distance between the free end of the fifth connecting segment of any battery pack and the cross-section of the adjacent battery pack is D, wherein D satisfies: 1mm≤D≤5mm.

[0017] According to some embodiments of the present invention, the thickness T4 of the interconnect structure is such that 0.1mm≤T4≤0.35mm.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of a photovoltaic module according to an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of a photovoltaic module according to an embodiment of the present utility model from another angle;

[0022] Figure 3 This is a schematic diagram of the interconnection structure of a photovoltaic module according to an embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of a photovoltaic module according to another embodiment of the present invention;

[0024] Figure 5 yes Figure 4 A schematic diagram of the photovoltaic module from another angle;

[0025] Figure 6 This is a schematic diagram of the formation of a photovoltaic module according to an embodiment of the present utility model.

[0026] Figure label:

[0027] 100: Photovoltaic modules;

[0028] 1: Battery pack; 10: First battery cell; 11: Cut-out end; 13: First grid area; 20: Second battery cell; 12: Non-cut-out end; 14: Second grid area; 3: Interconnection structure; 31: First connecting segment; 32: Second connecting segment; 33: Third connecting segment; 34: Fourth connecting segment; 35: Fifth connecting segment; 36: Sixth connecting segment. Detailed Implementation

[0029] The following is for reference. Figures 1-6 A photovoltaic module 100 according to a first aspect embodiment of the present invention is described.

[0030] like Figures 1-6 As shown, the photovoltaic module 100 according to a first aspect embodiment of the present invention includes a first solar cell 10 and a second solar cell 20 arranged adjacent to each other. In the description of the present invention, "a plurality of" means two or more.

[0031] Specifically, the first solar cell 10 is a sliced ​​solar cell with a cut-out end 11, which is the edge end where the slice cross-section is located; the second solar cell 20 is either a sliced ​​solar cell or a non-sliced ​​solar cell with a non-cut-out end 12, which is the edge end without a slice cross-section. The non-cut-out end 12 of the second solar cell 20 is stacked with the cut-out end 11 of the first solar cell 10, and the non-cut-out end 12 is located on the light-receiving side of the photovoltaic module 100, while the cut-out end 11 is located on the non-light-receiving side of the photovoltaic module 100.

[0032] Along the arrangement direction of the first solar cell 10 to the second solar cell 20 (e.g., Figure 2 The first and second battery cells 10 and 20 are arranged in a left-right direction, with their ends adjacent to each other in the thickness direction (e.g., ...). Figure 2 The first and second battery cells are stacked vertically (in the vertical direction), with the non-cut end 12 of the second battery cell 20 located above the cut end 11 of the first battery cell 10. The first battery cell 10 and the second battery cell 20 can be single-sided or back-contact battery cells.

[0033] For example, in Figure 1 , Figure 2 , Figure 4 and Figure 5 In the example, the cells are stacked along the arrangement direction from the first cell 10 to the second cell 20 to achieve series connection of the first cell 10 and the second cell 20. Silver paste easily forms a suspension element at the cut-out end 11 of the first cell 10. When light shines on the upper surface of the photovoltaic module 100, the charge carriers generated easily recombine with this suspension element. When the first cell 10 and the second cell 20 are stacked, with the ends of the second cell 20 and the first cell 10 stacked in the thickness direction, the non-cut-out end 12 of the second cell 20 is located above the cut-out end 11 of the first cell 10. Therefore, by using the non-cut-out end 12 to block the suspension element at the cut-out end 11, it is beneficial to reduce the recombination between the suspension element and the charge carriers, thereby reducing the power loss caused by the presence of the cut-out end 11 and increasing the power of the photovoltaic module 100.

[0034] According to the photovoltaic module 100 of this utility model embodiment, the non-cut end 12 of the second cell 20 is stacked with the cut end 11 of the first cell 10, wherein the non-cut end 12 is located on the light-receiving side of the photovoltaic module 100, which helps to reduce the power loss caused by the presence of the cut end 11 and improve the power of the photovoltaic module 100.

[0035] According to some embodiments of this utility model, refer to Figure 2 and Figure 3 Along the arrangement direction from the first solar cell 10 to the second solar cell 20, the stacking width of the first solar cell 10 and the second solar cell 20 is W, where W satisfies: 0.1mm ≤ W ≤ 1.5mm. When the stacking width of the first solar cell 10 and the second solar cell 20 is less than 0.1mm along the arrangement direction, the non-cut end 12 of the second solar cell 20 cannot guarantee that it will completely block the suspension of the cut end 11 of the first solar cell 10, thus limiting the power improvement effect on the photovoltaic module 100. When the stacking width of the first solar cell 10 and the second solar cell 20 is greater than 1.5mm, the non-cut end 12 of the second solar cell 20 blocks a large area of ​​the cut end 11 of the first solar cell 10, resulting in partial waste of the first solar cell 10 and reducing the power of the photovoltaic module 100. Therefore, by setting the stacking width of the first solar cell 10 and the second solar cell 20 along the arrangement direction from the first solar cell 10 to the second solar cell 20 to 0.1mm≤W≤1.5mm, it is beneficial to ensure that the non-cut end 12 of the second solar cell 20 blocks the suspension member of the cut end 11 of the first solar cell 10 as much as possible, so as to reduce the impact of the suspension member on the power of the photovoltaic module 100, and at the same time avoid the second solar cell 20 from excessively blocking the cut end 11, causing a decrease in the power of the photovoltaic module 100, thereby helping to ensure the power of the photovoltaic module 100.

[0036] According to some embodiments of this utility model, refer to Figure 6The first solar cell 10 includes a first grid area 13 on the side facing the light-receiving side, and the second solar cell 20 includes a second grid area 14 on the side facing the light-receiving side. Along the arrangement direction from the first solar cell 10 to the second solar cell 20, the minimum distance between the second grid area 14 and the non-cut end 12 is less than the minimum distance between the first grid area 13 and the cut end 11. The first grid area 13 is a conductive region of the first solar cell 10 used for collecting and transmitting current, and is a key structural region for the electrical performance of the first solar cell 10; the second grid area 14 is a conductive region of the second solar cell 20 used for collecting and transmitting current, and is also a key structural region for the electrical performance of the first solar cell 10. During the fabrication of the first solar cell 10 and the second solar cell 20, the corresponding first grid area 13 and second grid area 14 can be formed by laying silver paste or the like on at least one side of the thickness direction of the first solar cell 10 and the second solar cell 20. The first grid area 13 and the second grid area 14 are used to collect and transmit the photocurrent on the surface of the corresponding solar cell. To reduce the impact of the suspension element generated by the cut-out end 11 of the first solar cell 10 on the power of the photovoltaic module 100, the minimum distance between the first grid area 13 and the cut-out end 11 in the arrangement direction from the first solar cell 10 to the second solar cell 20 is relatively large, while the non-cut-out end 12 is passivated to the point where there is no suspension element. Therefore, the minimum distance between the non-cut-out end 12 and the second grid area 14 in the arrangement direction from the first solar cell 10 to the second solar cell 20 is relatively small. Thus, by limiting the above-mentioned distance, the impact of the suspension element of the cut-out end 11 on the power of the photovoltaic module 100 is reduced, while ensuring as much conductive area as possible (i.e., the effective area of ​​the first grid area 13 and the second grid area 14 corresponding to the light-receiving side) to improve the conductive power of the photovoltaic module 100.

[0037] According to some embodiments of the present invention, the cut end 11 of the first solar cell 10 is provided with a passivation film. By covering the cut end 11 with the passivation film, the number of hanging elements at the cut end 11 is effectively reduced, thereby helping to reduce the loss of photocurrent due to the hanging elements at the cut end 11, and thus improving the power of the photovoltaic module 100. At the same time, since the passivation film has a limited covering effect on the cut end 11, a small number of hanging elements may remain, thus allowing the non-cut end 12 of the second solar cell 20 to be stacked on the light-receiving side of the cut end 11 of the first solar cell 10, so as to maximize the power of the photovoltaic module 100.

[0038] According to some specific embodiments of this utility model, refer to Figures 1-5The first solar cell 10 and the second solar cell 20 are connected by an interconnecting structure 3. The interconnecting structure 3 connects the first solar cell 10 and the second solar cell 20, improving the overall structural integrity of the photovoltaic module 100 and facilitating its use. The interconnecting structure 3 can be a solder strip; no specific limitation is made here. This facilitates electrical conduction and mechanical fixation between the first solar cell 10 and the second solar cell 20, improving the conductivity of the photovoltaic module 100, enhancing its reliability, and extending its long-term service life.

[0039] Furthermore, referring to Figures 1-3 The interconnecting structure 3 includes a first connecting segment 31, a second connecting segment 32, and a third connecting segment 33. The first connecting segment 31 is connected to the light-receiving side of the first solar cell 10. The second connecting segment 32 is connected to the non-light-receiving side of the second solar cell 20. The third connecting segment 33 is connected between the first connecting segment 31 and the second connecting segment 32, with at least a portion of the third connecting segment 33 located in the overlapping area of ​​the first solar cell 10 and the second solar cell 20. The thickness of the third connecting segment 33 is less than the thickness of the first connecting segment 31, and the thickness of the third connecting segment 33 is less than the thickness of the second connecting segment 32. The first solar cell 10 and the second solar cell 20 can be single-sided solar cells. The first connecting segment 31, the third connecting segment 33, and the second connecting segment 32 are connected sequentially along the arrangement direction from the first solar cell 10 to the second solar cell 20. The first connecting segment 31 and the second connecting segment 32 are respectively connected to the surface of the corresponding first battery cell 10 or second battery cell 20. The third connecting segment 33 is disposed in the overlapping area of ​​the first battery cell 10 and the second battery cell 20 to connect the first connecting segment 31 and the second connecting segment 32. By controlling the thickness of the third connecting segment 33 to be less than the thickness of the first connecting segment 31 and the second connecting segment 32, it is beneficial to ensure that the third connecting segment 33 connects the first connecting segment 31 and the second connecting segment 32, while avoiding a large height in the thickness direction of the overlapping area of ​​the first battery cell 10 and the second battery cell 20, which would result in a large tilt angle of the second battery cell 20 facing the light-receiving side, increasing the difficulty of connecting the first connecting segment 31 and the second connecting segment 32. Therefore, it helps to reduce the difficulty of the third connecting segment 33 connecting the first connecting segment 31 and the third connecting segment 32, and improves the efficiency and accuracy of the first connecting segment 31 and the second connecting segment 32 connecting the corresponding battery cells.

[0040] Furthermore, referring to Figure 3The thickness of the first connecting segment 31 is T1, where T1 satisfies: 0.1mm ≤ T1 ≤ 0.35mm. Therefore, the thickness of the first connecting segment 31 is reasonably set, which helps to ensure the structural strength of the first connecting segment 31 and the reliability of its connection with the first solar cell 10. At the same time, it helps to ensure the resistance of the first connecting segment 31, minimizing current transmission loss in the first connecting segment 31, reducing power loss of the photovoltaic module 100, and increasing the power of the photovoltaic module 100.

[0041] The thickness of the second connecting segment 32 is T2, where T2 satisfies: 0.1mm ≤ T2 ≤ 0.35mm. Therefore, the thickness of the second connecting segment 32 is reasonably set, which helps ensure the structural strength of the second connecting segment 32 and the reliability of its connection with the second solar cell 20. Simultaneously, it helps to ensure the resistance of the second connecting segment 32, minimizing current transmission losses in the second connecting segment 32, reducing power loss of the photovoltaic module 100, and increasing the power of the photovoltaic module 100.

[0042] The thickness of the third connecting segment 33 is T3, where T3 satisfies: 0.05mm ≤ T3 ≤ 0.15mm. Therefore, the thickness of the third connecting segment 33 is reasonable, ensuring that while connecting the first connecting segment 31 and the second connecting segment 32, it reduces the pressure on the third connecting segment 33 in the stacking area of ​​the first battery cell 10 and the second battery cell 20. This improves the reliability of the connection between the first connecting segment 31 and the second connecting segment 32 and the corresponding battery cell surfaces, thus enhancing the performance of the interconnecting structure 3.

[0043] According to some embodiments of this utility model, along the arrangement direction from the first solar cell 10 to the second solar cell 20, the length of the third connecting segment 33 is greater than the width of the stacking area of ​​the first solar cell 10 and the second solar cell 20. By reasonably extending the length of the third connecting segment 33 along the arrangement direction from the first solar cell 10 to the second solar cell 20, large-angle tilting of the solar cells connected to the first connecting segment 31 and the second connecting segment 32 at their corresponding positions in the stacking area is avoided. This improves the connection stability between the positions of the first connecting segment 31 and the second connecting segment 32 adjacent to the stacking area and the corresponding solar cell connection positions, thereby enhancing the operational stability of the photovoltaic module 100.

[0044] Furthermore, referring to Figure 2 and Figure 3Along the arrangement direction from the first battery cell 10 to the second battery cell 20, the width of the overlapping area of ​​the first battery cell 10 and the second battery cell 20 is W, and the length of the third connecting segment 33 is L, where W and L satisfy: 2≤L / W≤4. Therefore, in the arrangement direction from the first battery cell 10 to the second battery cell 20, the ratio of the length of the third connecting segment 33 to the width of the overlapping area of ​​the first battery cell 10 and the second battery cell 20 is 2 to 4. Thus, the size of the third connecting segment 33 is reasonably set, ensuring that its size is suitable for meeting the requirements, while reducing the minimum distance between the connection point of the first connecting segment 31 and the first battery cell 10 and the overlapping area along the arrangement direction from the first battery cell 10 to the second battery cell 20. This facilitates the connection between the first connecting segment 31 and the light-receiving side of the first battery cell 10, and simultaneously reduces the minimum distance between the connection point of the second connecting segment 32 and the second battery cell 20 and the overlapping area, facilitating the connection between the second connecting segment 32 and the non-light-receiving side of the second battery cell 20.

[0045] According to some embodiments of this utility model, refer to Figure 4 and Figure 5 The interconnecting structure 3 is connected to the non-light-receiving surface of the first battery cell 10 and the second battery cell 20. The first battery cell 10 and the second battery cell 20 can be back-contact battery cells, and the interconnecting structure 3 is disposed on the non-light-receiving side of the first battery cell 10 and the second battery cell 20 to connect the first battery cell 10 and the second battery cell 20.

[0046] Furthermore, referring to Figure 5 The interconnecting structure 3 includes a fourth connecting segment 34, a fifth connecting segment 35, and a sixth connecting segment 36. The fourth connecting segment 34 and the fifth connecting segment 35 are respectively connected to the non-light-receiving surfaces of the first solar cell 10 and the second solar cell 20. The sixth connecting segment 36 connects the fourth connecting segment 34 and the fifth connecting segment 35. The sixth connecting segment 36 may at least correspond to the stacked area of ​​the first solar cell 10 and the second solar cell 20. Because of the presence of a step-like structure at the stacking point, when the structural strength of the interconnecting structure 3 is high, it is difficult for the fourth connecting segment 34 and the fifth connecting segment 35 of the interconnecting structure 3 to adhere and connect with the corresponding solar cells in the adjacent stacking area. Therefore, by designing the sixth connecting segment 36 to be at an acute or obtuse angle relative to the fourth connecting segment 34 and the fifth connecting segment 35, or by making the sixth connecting segment 36 bent, or by making the sixth connecting segment 36 abut against the cut end 11, it is beneficial for the fourth connecting segment 34 to maintain a close fit and connection with most of the non-light-receiving surface of the first solar cell 10, and for the fifth connecting segment 35 to maintain a close fit and connection with most of the non-light-receiving surface of the second solar cell 20. This is beneficial for improving the assembly efficiency of the photovoltaic module 100, improving the structural stability of the photovoltaic module 100, and extending the service life of the photovoltaic module 100.

[0047] According to some embodiments of this utility model, refer to Figure 5 The system comprises multiple battery packs 1, each battery pack 1 including a first battery cell 10 and a second battery cell 20 connected by an interconnecting structure 3. Along the arrangement direction of the first battery cell 10 to the second battery cell 20, the minimum distance D between the free end of the fifth connecting segment 35 of any battery pack 1 and the cross-section of its adjacent battery pack 1 is given by D, where D satisfies: 1mm ≤ D ≤ 5mm. Therefore, along the arrangement direction of the first battery cell 10 to the second battery cell 20, more battery cells can be stacked within the same photovoltaic module 100 mounting area. The free end of the fifth connecting segment 35 is spaced apart from the cross-section of its adjacent battery pack 1 to avoid interference between the interconnecting structure 3 and the cut end 11 of another battery pack 11, and to prevent the interconnecting structure 3 from connecting multiple battery cells. The minimum distance between the free end of the fifth connection segment 35 of any battery pack 1 and the cross-section of the adjacent battery pack 1 is set at 1mm≤D≤5mm, which makes the length of the interconnection structure 3 more reasonable. This helps to ensure that the interconnection structure 3 of any battery pack 1 is spaced apart from the cut end 11 of the adjacent battery pack 1, avoiding electrical interference, while ensuring the connection stability and reliability of the interconnection structure 3 connecting the two battery cells.

[0048] According to some embodiments of this utility model, refer to Figure 5 The thickness T4 of the interconnecting structure 3 satisfies the following condition: 0.1mm ≤ T4 ≤ 0.35mm. Therefore, the thickness of the interconnecting structure 3 is reasonably set, meeting the connection requirements between the interconnecting structure 3 and the first solar cell 10 and the second solar cell 20 while reducing the weight of the interconnecting structure 3. This helps ensure the stability and reliability of the interconnecting structure 3 on the non-light-receiving side of the first solar cell 10 and the second solar cell 20. Furthermore, it helps to ensure the resistance of the interconnecting structure 3, minimizing current transmission losses in the interconnecting structure 3, reducing the power loss of the photovoltaic module 100, and increasing the power of the photovoltaic module 100.

[0049] When a photovoltaic power generation system includes the aforementioned photovoltaic module 100, it helps to improve the power generation efficiency and overall economic benefits of the photovoltaic power generation system.

[0050] Other configurations and operations of the photovoltaic module 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0051] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, characterized in that, include: The first and second battery cells are arranged adjacent to each other, wherein the first battery cell is a sliced ​​battery with a cut end, the cut end being the edge end where the slice cross-section is located; the second battery cell is a sliced ​​battery or a non-sliced ​​battery with a non-cut end, the non-cut end being the edge end without a slice cross-section. The non-cut end of the second solar cell is stacked with the cut end of the first solar cell, and the non-cut end is located on the light-receiving side of the photovoltaic module, while the cut end is located on the non-light-receiving side of the photovoltaic module.

2. The photovoltaic module according to claim 1, characterized in that, Along the arrangement direction from the first battery cell to the second battery cell, the width of the overlapping area of ​​the first battery cell and the second battery cell is W, wherein W satisfies: 0.1mm≤W≤1.5mm.

3. The photovoltaic module according to claim 1, characterized in that, The first solar cell includes a first grid line region on the side facing the light-receiving side, and the second solar cell includes a second grid line region on the side facing the light-receiving side. Along the arrangement direction from the first battery cell to the second battery cell, the minimum distance between the second grid line area and the non-cut end is less than the minimum distance between the first grid line area and the cut end.

4. The photovoltaic module according to claim 1, characterized in that, The cut end of the first battery cell is provided with a passivation film.

5. The photovoltaic module according to any one of claims 1-4, characterized in that, The first battery cell and the second battery cell are connected by an interconnecting structure.

6. The photovoltaic module according to claim 5, characterized in that, The interconnection structure includes: The first connecting segment is connected to the light-receiving side of the first battery cell; The second connecting segment is connected to the non-light-receiving side of the second battery cell; A third connecting segment is connected between the first connecting segment and the second connecting segment. At least a portion of the third connecting segment is located in the stacked area of ​​the first and second battery cells. The thickness of the third connecting segment is less than the thickness of the first connecting segment and the thickness of the second connecting segment.

7. The photovoltaic module according to claim 6, characterized in that, The thickness of the first connecting segment is T1, wherein T1 satisfies: 0.1mm ≤ T1 ≤ 0.35mm; and / or The thickness of the second connecting segment is T2, wherein T2 satisfies: 0.1mm ≤ T2 ≤ 0.35mm; and / or The thickness of the third connecting segment is T3, wherein T3 satisfies: 0.05mm≤T3≤0.15mm.

8. The photovoltaic module according to claim 6, characterized in that, Along the arrangement direction from the first battery cell to the second battery cell, the length of the third connecting segment is greater than the width of the stacked area of ​​the first battery cell and the second battery cell.

9. The photovoltaic module according to claim 8, characterized in that, Along the arrangement direction from the first battery cell to the second battery cell, the width of the stacked area of ​​the first battery cell and the second battery cell is W, and the length of the third connecting segment is L, wherein W and L satisfy: 2≤L / W≤4.

10. The photovoltaic module according to claim 5, characterized in that, The interconnect structure is connected to the non-light-receiving side surfaces of the first and second solar cells.

11. The photovoltaic module according to claim 10, characterized in that, The interconnection structure includes a fourth connection segment, a fifth connection segment, and a sixth connection segment. The fourth connection segment and the fifth connection segment are respectively connected to the non-light-receiving surfaces of the first battery cell and the second battery cell, and the sixth connection segment connects the fourth connection segment and the fifth connection segment.

12. The photovoltaic module according to claim 11, characterized in that, include: Multiple battery packs, each battery pack including a first battery cell and a second battery cell connected via the interconnection structure, Wherein, along the arrangement direction from the first battery cell to the second battery cell, the minimum distance between the free end of the fifth connecting segment of any battery pack and the cross-section of the adjacent battery pack is D, wherein D satisfies: 1mm≤D≤5mm.

13. The photovoltaic module according to claim 10, characterized in that, The thickness T4 of the interconnect structure is such that 0.1mm ≤ T4 ≤ 0.35mm.

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