Photovoltaic module

Abstract

The application relates to the photovoltaic field and provides a photovoltaic module which can at least improve the reliability of the photovoltaic module. The photovoltaic module comprises a plurality of cell strings, a plurality of first bus bars, at least one jumper wire and a diaphragm. Two adjacent cell strings have a first area or a second area, the cell string comprises a plurality of cell pieces arranged in a first direction; the plurality of first bus bars are respectively located at opposite ends of the cell string and are electrically connected with the cell string; the jumper wire extends in the first direction and is electrically connected with two oppositely arranged first bus bars; at least part of the projection of the jumper wire in the thickness direction of the cell piece is located on the first area; and at least part of the diaphragm is located in the second area.

Description

Technical Field

[0001] This application relates to the field of photovoltaics, and in particular to a photovoltaic module. Background Technology

[0002] With the rapid development of the photovoltaic industry, photovoltaic modules, as the core component of solar power generation systems, have undergone continuous optimization in structural design and manufacturing processes. Currently, photovoltaic modules typically consist of multiple cells connected in series via solder strips to form a cell string, and then multiple cell strings are connected in parallel or series via busbars. Simultaneously, to address issues such as circuit continuity during the parallel / series connection of cell strings, jumpers are introduced into photovoltaic modules to optimize circuit connections.

[0003] However, the introduction of jumpers can cause collisions or even parallel connection between some adjacent cell strings, which means that the reliability of photovoltaic modules needs to be improved. Summary of the Invention

[0004] This application provides a photovoltaic module that can at least improve the reliability of the photovoltaic module.

[0005] This application provides a photovoltaic module, comprising: a plurality of cell strings, with a first region or a second region between adjacent cell strings, each cell string including a plurality of cells arranged along a first direction; a plurality of first busbars, each first busbar being located at opposite ends of the cell strings and electrically connected to the cell strings; at least one jumper wire, the jumper wire extending along the first direction and electrically connected to two oppositely arranged first busbars, at least a portion of the jumper wire's projection in the thickness direction of the cell being located on the first region; and a film, at least a portion of the film being located within the second region.

[0006] Optionally, the photovoltaic module further includes a first adhesive, which is connected to at least one adjacent cell string in the first region.

[0007] Optionally, the photovoltaic module further includes a second adhesive, which is connected to at least one adjacent cell string in the second region.

[0008] Optionally, the diaphragm is spaced apart from the second adhesive member.

[0009] Optionally, the number of first adhesive members adjacent to the first region is greater than the number of second adhesive members adjacent to the second region.

[0010] Optionally, the first adhesive connects to a plurality of the battery cells, and the second adhesive connects to a plurality of the battery cells, wherein the number of battery cells connected to the first adhesive is greater than the number of battery cells connected to the second adhesive.

[0011] Optionally, the diaphragm includes: a first part located in the second region; and a second part connected to the first part and located on at least one battery string adjacent to the jumper.

[0012] Optionally, a channel extending in the first direction is formed between the surface of the second part facing the battery string and the battery string.

[0013] Optionally, the photovoltaic module further includes: an encapsulating film layer covering the surface of the battery string; wherein the material of the film is the same as the material of the encapsulating film layer.

[0014] Optionally, the photovoltaic module further includes: an isolation layer, at least a portion of which is located between the jumper and the battery string; wherein the isolation layer includes: an adhesive portion and an isolation portion, the adhesive portion being connected to the battery string adjacent to the jumper; the isolation portion being located on the side of the adhesive portion facing the jumper.

[0015] Optionally, the thickness of the diaphragm is 0.1 mm to 1 mm.

[0016] The technical solution provided in this application has at least the following advantages:

[0017] In the photovoltaic module provided in this application, there is a first region or a second region between two adjacent cell strings. At least part of the film is located in the second region, which can prevent the two adjacent cell strings in the second region from colliding or being connected in parallel, thereby improving the reliability of the photovoltaic module. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this application or in the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a partial structure of a photovoltaic module in related technologies;

[0020] Figure 2 This is a schematic diagram of another partial structure of a photovoltaic module in related technologies;

[0021] Figure 3 This is a schematic diagram of a partial structure of a photovoltaic module's battery pack;

[0022] Figure 4 This is a schematic diagram of a photovoltaic module provided in an embodiment of this application;

[0023] Figure 5 A circuit diagram of a photovoltaic module provided in an embodiment of this application;

[0024] Figure 6 A partial cross-sectional view of a photovoltaic module provided in an embodiment of this application;

[0025] Figure 7 Another partial cross-sectional view of the photovoltaic module provided in the embodiments of this application;

[0026] Figure 8 This is a schematic diagram of a possible assembly structure of a cell string and a diaphragm in a photovoltaic module provided in an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of another possible combination structure between the cell string and the film in a photovoltaic module provided in an embodiment of this application;

[0028] Figure 10 Another partial cross-sectional view of a photovoltaic module provided in an embodiment of this application;

[0029] Figure 11 This is a partial structural schematic diagram of a photovoltaic module provided in an embodiment of this application;

[0030] Figure 12 This is a schematic diagram of a possible assembly structure of a photovoltaic module, including a cell string, an isolation layer, and jumpers, provided in an embodiment of this application.

[0031] Figure 13 This is a schematic diagram of another possible assembly structure of the cell string, the isolation layer, and the jumper wire in a photovoltaic module provided in an embodiment of this application.

[0032] Figure 14 This is a schematic diagram of a possible assembly structure of the cell string, separator, reflective film, and jumper wire in a photovoltaic module provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Battery pack; 101. First region; 102. Second region; 103. Battery substrate; 11. Wire; 12. Encapsulating film; 13. Encapsulation cover plate; 20. Battery string; 201. First region; 202. Second region; 203. Battery cell; 204. Solder ribbon; 205. First sub-cell string; 206. Second sub-cell string; 207. First side; 208. Second side; 21. First busbar; 211. Second busbar; 22. Jumper wire; 23. Diaphragm; 231. First part; 232. Second part; 2322. Channel; 24. Adhesive film layer; 25. First adhesive component; 26. Second adhesive component; 27. Separator layer; 271. Adhesive part; 272. Separator part; 273. Main body part; 274. Protrusion; 28. Reflective film; 29. ​​Cover plate. Detailed Implementation

[0035] Figure 1 This is a schematic diagram of a partial structure of a photovoltaic module in related technologies. Figure 2 This is a schematic diagram of another partial structure of a photovoltaic module in related technologies. Figure 3 This is a schematic diagram of a partial structure of a photovoltaic module's battery pack. Among them, Figure 1 This is a schematic diagram of a partial structure of a photovoltaic module before lamination. Figure 2 This is a schematic diagram of a partial structure of a photovoltaic module during the lamination process in related technologies. Figure 2 This illustration shows a situation where, during the lamination process of a photovoltaic module, the high stress on the conductors causes the movement of two adjacent cell strings. Figure 2 The arrows in the diagram indicate the direction of the pressure applied to the wire. Additionally, Figure 2 The image only briefly illustrates the position of the encapsulating film before lamination. In reality, during the lamination process, the encapsulating film becomes a molten flow dynamic and comes into contact with the battery string.

[0036] refer to Figures 1 to 3 The photovoltaic module includes multiple battery packs 10, wires 11, encapsulating film 12, and encapsulation cover plate 13. Adjacent battery packs 10 have a first region 101 or a second region 102. Each battery pack 10 includes multiple battery substrates 103. The wires 11 are located on two adjacent battery packs 10, and the projection of the wires 11 in the thickness direction of the battery substrate 103 covers the first region 101. The encapsulating film 12 is located on the surface of the battery packs 10 and the wires 11, and the encapsulation cover plate 13 is located on the side of the encapsulating film 12 facing away from the battery packs 10.

[0037] Among them, the wire 11 is used as a jumper, and the projection of the wire 11 in the thickness direction of the battery substrate 103 is far away from the second region 102.

[0038] During the lamination process of photovoltaic modules, the position of the conductor 11 is higher than that of the battery pack 10. The conductor 11 will be subjected to greater stress during lamination, which may cause the battery pack 10 adjacent to the conductor 11 to move away from the position of the conductor 11 to both sides. This may cause the two battery packs 10 adjacent to the second region 102 to collide or even be connected in parallel, affecting the reliability of the photovoltaic module.

[0039] Therefore, this application provides a photovoltaic module with a first region or a second region between two adjacent cell strings. At least part of the film is located in the second region, which can prevent the cell strings adjacent to the jumper from moving away from the jumper location during the lamination process of the photovoltaic module. This avoids the cell strings adjacent to the second region from colliding or being connected in parallel, thereby improving the reliability of the photovoltaic module.

[0040] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0043] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0044] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0046] In the description of the embodiments of this application, "electrically connected to one component" means that both components are made of conductive materials, and the two components are in direct contact and connected or connected via other conductive materials. Therefore, when the photovoltaic module is generating electricity, there is current transfer between the two components. "Electrically contacting one component to another" means that the two components are not only in contact, but also, because both components are made of conductive materials, there is current transfer between the two components when the photovoltaic module is generating electricity.

[0047] In the accompanying drawings corresponding to the embodiments of this application, the thickness and area of ​​the layers are enlarged for better understanding and ease of description. When describing a component (such as a layer, film, region, or substrate) on or on the surface of another component, the component may be "directly" located on the surface of the other component, or there may be a third component between the two components. Conversely, when describing a component on the surface of another component, or when another component is formed or disposed on the surface of a component, it indicates that there is no third component between the two components. Furthermore, when describing a component as being "generally" formed on another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor is it formed on a portion of the edge of the entire surface.

[0048] In the description of the embodiments of this application, when a component "includes" another component, other components are not excluded unless otherwise stated, and other components may be further included. Furthermore, when a component such as a layer, film, region, or plate is referred to as being "on / located" on another component, it can be "directly on" the other component (i.e., located on the surface of the other component with no other components between them), or another component may be present therein. Moreover, when a component such as a layer, film, region, or plate is "directly located" on another component, or when a component such as a layer, film, region, or plate is located on the surface of another component, it indicates that no other components are located therein.

[0049] The embodiments of this application will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this application to facilitate a better understanding of the application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0050] Figure 4 This is a schematic diagram of a photovoltaic module provided in an embodiment of this application. Figure 5 This is a circuit diagram of a photovoltaic module provided in an embodiment of this application. Figure 6 This is a partial cross-sectional view of a photovoltaic module provided in an embodiment of this application. Figure 7 This is another partial cross-sectional view of the photovoltaic module provided in an embodiment of this application. Wherein, Figure 6 The membrane is not shown in the image.

[0051] refer to Figures 4 to 7 The photovoltaic module includes: multiple cell strings 20, multiple first busbars 21, at least one jumper 22, and a film 23. A first region 201 or a second region 202 is provided between adjacent cell strings 20. Each cell string 20 includes multiple cells 203 arranged along a first direction X. The multiple first busbars 21 are located at opposite ends of the cell strings 20 and are electrically connected to them. The jumper 22 extends along the first direction X and is electrically connected to two oppositely arranged first busbars 21. At least a portion of the jumper 22's projection in the thickness direction of the cell 203 lies on the first region 201. At least a portion of the film 23 is located within the second region 202.

[0052] Photovoltaic modules are used to convert solar energy into electrical energy.

[0053] In some embodiments, the distance between two adjacent battery strings 20 along the second direction Y is 0.1mm to 1mm, for example, 0.1mm, 0.3mm, 0.5mm, 0.8mm, or 1mm. This relatively small distance between adjacent battery strings 20 is beneficial for improving the space utilization rate of photovoltaic modules.

[0054] The first direction X is the arrangement direction of the multiple battery cells 203 in the battery string 20, and the second direction Y is the arrangement direction of the multiple battery strings 20.

[0055] There is a first region 201 or a second region 202 between two adjacent battery strings 20. The projection of the jumper 22 in the thickness direction of the battery cell 203 covers the first region 201 and is away from the second region 202.

[0056] In some embodiments, the battery string 20 includes a solder strip 204 for connecting adjacent battery cells 203.

[0057] The solar cell 203 can be one or any combination of PERC (Passivated Emitter Rear Cell), IBC (Interdigitated Back Contact), TOPCON (Tunnel Oxide Passivated Contact), heterojunction, thin-film solar cells, and tandem solar cells. Thin-film solar cells include, but are not limited to, perovskite thin-film solar cells, copper indium selenide (CIGS) thin-film solar cells, gallium arsenide (GaAs) thin-film solar cells, and cadmium sulfide (CdS) thin-film solar cells. Tandem solar cells include, but are not limited to, perovskite cells stacked with crystalline silicon cells, perovskite cells stacked with perovskite cells, and perovskite cells stacked with thin-film cells. Figure 4 Taking TOPCON battery cell 203 as an example.

[0058] Solar cell 203 can be a cell with a main grid, which shortens the current conduction path and reduces internal losses, thereby increasing the power of the photovoltaic module. Solar cell 203 can also be a cell without a main grid, in which case solder ribbon 204 is used to replace the original main grid and is directly connected to the fine grid, which can significantly reduce the consumption of silver paste, thereby reducing the cost of the photovoltaic module.

[0059] The solar cell 203 can be a whole cell or a sliced ​​cell. A sliced ​​cell refers to a cell formed by cutting a complete cell. Sliced ​​cells can be two-piece sliced ​​cells, three-piece sliced ​​cells, or four-piece sliced ​​cells, etc.

[0060] The battery string 20 includes a first sub-battery string 205 and a second sub-battery string 206 arranged along a first direction X. A first busbar 21 is located on the side of the first sub-battery string 205 opposite to the second sub-battery string 206, and also on the side of the second sub-battery string 206 opposite to the first sub-battery string 205. The first busbar 21 is an end busbar used for electrical connection with the battery string 20.

[0061] The jumper 22 extends along the first direction X and is electrically connected to the first busbar 21.

[0062] Jumper 22 is used to connect to a bypass diode, allowing the bypass diode to be connected in reverse parallel to the battery string 20. When part of the battery string 20 is shaded or malfunctions, the bypass diode can conduct in reverse, allowing the current to bypass the shaded or faulty battery string, without affecting the power generation of other normal battery strings 20, thereby improving the reliability of the photovoltaic module.

[0063] In some embodiments, the photovoltaic module further includes a second busbar 211, which is located between the first sub-cell string 205 and the second sub-cell string 206 and is electrically connected to the first sub-cell string 205 and the second sub-cell string 206.

[0064] The diaphragm 23 can provide a buffering force for two adjacent battery strings 20 in the second region 202, preventing collisions and parallel connection of adjacent battery strings 20 in the second region 202.

[0065] Figure 8 This is a schematic diagram of a possible assembly structure of a cell string and a diaphragm in a photovoltaic module provided in an embodiment of this application.

[0066] refer to Figure 6 and Figure 8 In some embodiments, the diaphragm 23 includes a first part 231 and a second part 232, the first part 231 being located in the second region 202; the second part 232 being connected to the first part 231 and located on at least one battery string 20 adjacent to the jumper 22.

[0067] The first part 231 is located within the second zone 202 and can serve as a buffer layer between two adjacent battery strings 20 in the second zone 202 to prevent collisions or parallel connections between them. The second part 232 is located on the surface of the battery string 20 adjacent to the jumper 22 and can prevent misalignment of two adjacent battery strings 20 in the second zone 202 along the thickness direction of the battery cell 203.

[0068] The battery string 20 may have a first surface 207 and a second surface 208. The second part 232 may be located on the first surface 207 of one of the two adjacent battery strings 20 and on the second surface 208 of the other of the two adjacent battery strings 20. In this case, the diaphragm 23 is Z-shaped, which can prevent the adjacent battery strings 20 from being misaligned along the thickness direction of the battery sheet 203.

[0069] In other embodiments, the second part 232 may be located simultaneously on the first surface 207 and the second surface 208 of two adjacent battery strings 20. In this case, the diaphragm 23 is H-shaped, which can more effectively prevent adjacent battery strings 20 from being misaligned along the thickness direction of the battery sheet 203.

[0070] Figure 9 This is a schematic diagram of another possible combination structure of the cell string and the film in a photovoltaic module provided in an embodiment of this application.

[0071] refer to Figure 6 and Figure 9 In some embodiments, a channel 2322 extending along the first direction X is formed between the surface of the second part 232 facing the battery string 20 and the battery string 20. With this configuration, hot air in the hot air blowing process can pass through the channel 2322 to locally heat the surface of the second part 232 facing the battery string 20, so that the second part 232 can be fixed to the surface of the battery string 20, which is beneficial to improving the reliability of the photovoltaic module.

[0072] In some embodiments, the surface of the second part 232 facing the battery string 20 is uneven, such that a channel 2322 can be formed between the surface of the second part 232 facing the battery string 20 and the battery string 20.

[0073] In some embodiments, the surface of the second part 232 facing the battery string 20 may be serrated.

[0074] Understandable, Figure 9 The illustration shows a second surface facing the battery string 20 with two channels 2322. In practice, the number of channels between the second surface facing the battery string can be 1, 3, 4, or other values. Figure 9 The illustration shows a triangular cross-section of the channel. In reality, the cross-section of the channel can also be other shapes such as a semicircle, square, or ellipse. This application does not limit this to any particular shape.

[0075] In some embodiments, after placing the diaphragm 23 between the battery strings 20 adjacent to the first region 201, the second part 232 can be heated by using a soldering iron tip to locally heat the second part 232, so that the second part 232 can be fixed on the surface of the battery string 20, which is beneficial to improving the reliability of the photovoltaic module.

[0076] In some embodiments, the thickness of the diaphragm 23 is 0.1 mm to 1 mm, for example, 0.1 mm, 0.3 mm, 0.5 mm, 0.8 mm, or 1 mm. A thickness within this range provides sufficient buffering force for adjacent battery strings 20, preventing collisions or parallel connections between them.

[0077] In some embodiments, the photovoltaic module includes a plurality of films 23 arranged at intervals along a first direction X. Each film 23 may be in contact with 1 to 5 solar cells 203 in a solar cell string 20.

[0078] In some embodiments, the length of the diaphragm 23 along the first direction X can be 50mm to 100mm, for example, 50mm, 60mm, 70mm, 80mm, 90mm or 100mm. The width of the diaphragm 23 along the second direction Y can be 5mm to 10mm, for example, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm.

[0079] Figure 10 This is another partial cross-sectional view of a photovoltaic module provided in an embodiment of this application.

[0080] refer to Figure 4 and Figure 10 In some embodiments, the photovoltaic module further includes an encapsulant layer 24 covering the surface of the cell string 20; wherein the material of the film 23 is the same as the material of the encapsulant layer 24. The fact that the material of the film 23 is the same as the material of the encapsulant layer 24 facilitates compatibility during lamination and avoids incompatibility between the film 23 and the encapsulant layer 24 due to different materials, which could lead to poor contact and negative effects such as bubbles. This also helps improve the reliability of the photovoltaic module.

[0081] The encapsulation layer 24 includes a first encapsulation film and a second encapsulation film. The first encapsulation film covers one of the front and back sides of the battery cell 203, and the second encapsulation film covers the other of the front and back sides of the battery cell 203. Specifically, at least one of the first and second encapsulation films can be organic encapsulation films such as polyvinyl butyral (PVB) film, ethylene-vinyl acetate copolymer (EVA) film, polyvinyl octene coelastomer (POE) film, or polyethylene terephthalate (PET) film. Alternatively, at least one of the first and second encapsulation films can also be films such as EP film, EPE film, or PVP film. Among them, EP film refers to a co-extruded film composed of stacked EVA film and POE film; EPE film refers to a co-extruded film formed by sequentially stacking EVA film, POE film, and EVA film; and PVP film refers to a co-extruded film formed by stacking POE film, EVA film, and POE film. Co-extruded films can be prepared by sequentially extruding one or more raw materials onto another pre-made film during the film processing, or by bonding different types of pre-made films together.

[0082] In some cases, the first and second encapsulant films have a boundary line before lamination. After lamination to form the photovoltaic module, the concept of a first and second encapsulant film no longer exists; that is, the first and second encapsulant films have formed a single encapsulant layer 24. Figure 10The illustration shows the encapsulant layer 24 of the photovoltaic module after lamination, that is, the encapsulant layer 24 in which the first encapsulant and the second encapsulant have formed an integral encapsulant layer.

[0083] Figure 11 This is a partial structural schematic diagram of a photovoltaic module provided in an embodiment of this application. Figure 4 and Figure 11 The illustration shows the first adhesive 25 and the jumper 22 located on the same surface of the battery string 20. In reality, the first adhesive 25 and the jumper 22 can also be located on different surfaces of the battery string 20.

[0084] Specifically, refer to Figure 4 , Figure 8 and Figure 11 The first adhesive 25 may be located on one of the first surface 207 and the second surface 208, and the jumper 22 may be located on the other of the first surface 207 and the second surface 208. This application does not limit this.

[0085] refer to Figure 4 , 6 and Figure 11 In some embodiments, the photovoltaic module further includes a first adhesive 25, which is connected to at least one adjacent cell string 20 in the first region 201.

[0086] The jumper 22 may be subjected to pressure during the lamination process, which could cause the adjacent cell strings 20 in the first zone 201 to move away from the location of the first zone 201. Therefore, by connecting the first adhesive 25 to the adjacent cell strings 20 in the first zone 201, the risk of the adjacent cell strings 20 in the first zone 201 moving to the sides can be reduced, that is, the spacing between the adjacent cell strings 20 in the first zone 201 can be prevented from increasing during the lamination process, thereby improving the reliability of the photovoltaic module.

[0087] The first adhesive member 25 can be directly connected to two battery strings 20 adjacent to the first region 201 to fix the two battery strings 20 adjacent to the first region 201. The first adhesive member 25 may also include a first sub-adhesive member and a second sub-adhesive member. The first sub-adhesive member is connected to one of the two adjacent battery strings 20, and the second sub-adhesive member is connected to the other of the two adjacent battery strings 20. The first sub-adhesive member and the second sub-adhesive member are connected to fix the two battery strings 20 adjacent to the first region 201.

[0088] The first adhesive component 25 can be tape.

[0089] In some embodiments, the photovoltaic module further includes a second adhesive 26, which is connected to at least one adjacent cell string 20 in the second region 202. The second adhesive 26 is used to connect adjacent cell strings 20 in the second region 202 to prevent the adjacent cell strings 20 in the first region 201 from shifting during the lamination process, thereby increasing the string spacing and improving the reliability of the photovoltaic module.

[0090] The second adhesive member 26 can be directly connected to the two battery strings 20 adjacent to the second zone 202 to fix the two battery strings 20 adjacent to the second zone 202. The second adhesive member 26 may also include a third sub-adhesive member and a fourth sub-adhesive member. The third sub-adhesive member is connected to one of the two adjacent battery strings 20, and the fourth sub-adhesive member is connected to the other of the two adjacent battery strings 20. The connection between the third sub-adhesive member and the fourth sub-adhesive member is used to fix the two battery strings 20 adjacent to the second zone 202.

[0091] The second adhesive component 26 can be an adhesive tape.

[0092] In some embodiments, the diaphragm 23 and the second adhesive member 26 are spaced apart. This avoids contact between the diaphragm 23 and the second adhesive member 26, which would affect the adhesive performance of the second adhesive member 26, and thus also helps to improve the reliability of the photovoltaic module.

[0093] In some embodiments, the photovoltaic module includes a plurality of films 23 arranged at intervals along a first direction X. At least one second adhesive member 26 is disposed between adjacent films 23, and / or at least one film 23 is disposed between adjacent second adhesive members 26. This arrangement, in which the films 23 and the second adhesive members 26 are relatively dispersedly arranged in the first region 201, can provide a more uniform buffering force for adjacent cell strings 20 in the first region 201, as well as a force to fix two adjacent cell strings 20.

[0094] In other embodiments, the diaphragm 23 extends along a first direction X and contacts a plurality of battery cells 203 in the battery string 20. That is, the diaphragm 23 can be provided as a whole and contact a plurality of battery cells 203 in the battery string 20, so that the diaphragm 23 can provide a more effective buffering effect between adjacent battery strings 20.

[0095] In some embodiments, the number of first adhesive members 25 adjacent to the first region 201 is greater than the number of second adhesive members 26 adjacent to the second region 202. The presence of jumper wires 22 increases the risk of increased spacing between adjacent cell strings 20 in the first region 201 compared to adjacent cell strings 20 in the second region 202 during lamination. Increasing the number of first adhesive members 25 adjacent to the first region 201 is more beneficial in reducing the risk of displacement of adjacent cell strings 20 in the first region 201. Conversely, decreasing the number of second adhesive members 26 adjacent to the second region 202 helps save on the manufacturing cost of photovoltaic modules.

[0096] In some embodiments, a first adhesive 25 connects multiple battery cells 203, and a second adhesive 26 connects multiple battery cells 203. The number of battery cells 203 connected by the first adhesive 25 is greater than the number of battery cells 203 connected by the second adhesive 26. The presence of jumper wires 22 makes the risk of increased spacing between adjacent battery strings 20 in the first region 201 greater than the risk of increased spacing between adjacent battery strings 20 in the second region 202 during lamination. Connecting more battery cells 203 with the first adhesive 25 is more beneficial in reducing the risk of displacement of adjacent battery strings 20 in the first region 201, while connecting fewer battery cells 203 with the second adhesive 26 is beneficial in saving the amount of second adhesive 26 used.

[0097] Figure 12 This is a schematic diagram of a possible arrangement of cell strings, isolation layer and jumper wires in a photovoltaic module provided in an embodiment of this application.

[0098] refer to Figure 12 In some embodiments, the photovoltaic module further includes an isolation layer 27, at least a portion of which is located between the jumper 22 and the battery string 20; wherein the isolation layer 27 includes an adhesive portion 271 and an isolation portion 272, the adhesive portion 271 being connected to the battery string 20 adjacent to the jumper 22; and the isolation portion 272 being located on the side of the adhesive portion 271 facing the jumper 22.

[0099] The isolation layer 27 is located between the jumper 22 and the battery string 20, which can prevent the jumper 22 and the battery string 20 from directly contacting each other and causing a short circuit.

[0100] The adhesive layer is used to connect the battery string 20 adjacent to the jumper 22. On the one hand, it can help the isolation part 272 to connect with the battery string 20. On the other hand, the adhesive properties of the adhesive layer can also help fix the two battery strings 20 adjacent to the jumper 22, reduce the risk of increased string spacing between the battery strings 20 adjacent to the jumper 22, and also help improve the reliability of the photovoltaic module.

[0101] Figure 13 This is a schematic diagram of another possible arrangement of the cell string, the isolation layer, and the jumper wire in a photovoltaic module provided in an embodiment of this application.

[0102] refer to Figure 13 In some embodiments, the photovoltaic module further includes an isolation layer 27, at least a portion of which is located between the jumper 22 and the battery string 20. The isolation layer 27 includes a main body 273 and a protrusion 274. The main body 273 is located between the jumper 22 and the battery string 20; the protrusion 274 is located on the side of the main body 273 facing away from the jumper 22 and is located within the first region 201. With this configuration, the protrusion 274 of the isolation layer 27 can provide a buffering force for adjacent battery strings 20 in the first region 201, preventing collisions or parallel connections between adjacent battery strings 20.

[0103] Figure 14 This is a schematic diagram of a possible assembly structure of the cell string, separator, reflective film, and jumper wire in a photovoltaic module provided in an embodiment of this application.

[0104] refer to Figure 14 In some embodiments, the photovoltaic module further includes a reflective film 28, located between the film 23 and the jumper 22. The reflective film 28 can reflect more sunlight onto the surface of the cell string 20, increasing the amount of light received and thus improving the photoelectric conversion efficiency.

[0105] Continue to refer to Figure 10 In some embodiments, the photovoltaic module also includes a cover plate 29 located on the surface of the encapsulant layer 24 opposite to the cell string 20.

[0106] In some embodiments, the cover plate 29 can be a glass cover plate, a plastic cover plate, or other cover plate with light-transmitting function. Specifically, the surface of the cover plate 29 facing the adhesive film layer 24 can be an uneven surface or a textured surface containing multiple raised structures, thereby increasing the utilization rate of incident light. The cover plate 29 includes a first cover plate and a second cover plate, the first cover plate being opposite to the first adhesive film, and the second cover plate being opposite to the second adhesive film.

[0107] Those skilled in the art will understand that the above embodiments are specific examples of implementing this application, and in practical applications, various changes in form and detail can be made without departing from the spirit and scope of this application. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this application; therefore, the scope of protection of this application should be determined by the scope defined in the claims.

Claims

1. A photovoltaic module, characterized in that, include: Multiple battery strings, with a first region or a second region between two adjacent battery strings, the battery strings comprising multiple battery cells arranged along a first direction; Multiple first busbars are located at opposite ends of the battery string and are electrically connected to the battery string. At least one jumper wire extends along the first direction and is electrically connected to two opposing first busbars, wherein at least a portion of the jumper wire's projection in the thickness direction of the solar cell lies on the first region; A diaphragm, at least a portion of which is located within the second region; A first adhesive element is connected to at least one adjacent battery string in the first region; A second adhesive element is connected to at least one adjacent battery string in the second region; The number of first adhesive pieces adjacent to the first region is greater than the number of second adhesive pieces adjacent to the second region.

2. The photovoltaic module according to claim 1, characterized in that, The diaphragm is spaced apart from the second adhesive component.

3. The photovoltaic module according to claim 1, characterized in that, The first adhesive connects to a plurality of the battery cells, and the second adhesive connects to a plurality of the battery cells, wherein the number of battery cells connected to the first adhesive is greater than the number of battery cells connected to the second adhesive.

4. The photovoltaic module according to claim 1, characterized in that, The membrane includes: Part One, Part One is located in Section Two; The second part is connected to the first part and is located on at least one battery string adjacent to the jumper.

5. The photovoltaic module according to claim 4, characterized in that, The second part has a channel extending in the first direction between its surface facing the battery string and the battery string.

6. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module also includes: An adhesive film layer that covers the surface of the battery string; The material of the diaphragm is the same as the material of the adhesive film layer.

7. The photovoltaic module according to claim 1, characterized in that, The photovoltaic module also includes: An insulating layer, at least a portion of which is located between the jumper and the battery string; wherein the insulating layer includes an adhesive portion and an insulating portion, the adhesive portion being connected to the battery string adjacent to the jumper; the insulating portion being located on the side of the adhesive portion facing the jumper.

8. The photovoltaic module according to claim 1, characterized in that, The thickness of the diaphragm is 0.1 mm to 1 mm.

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