Photovoltaic module and photovoltaic system

Abstract

Disclosed are a photovoltaic module and a photovoltaic system. The photovoltaic module comprises: a battery laminated member and a frame, wherein the frame covers at least part or all of a circumferential side wall of the battery laminated member; and an adhesive film layer is provided in the battery laminated member, with part or all of the edge of the adhesive film layer extending between the frame and the battery laminated member. The bonding and fixing between the frame and the battery laminated member can be realized by using the adhesive film layer, such that it is convenient to bond and fix the frame during lamination forming or hot pressing forming of the battery laminated member, thereby helping to simplify a processing process and improve the production efficiency; and the frame is bonded and fixed by using the adhesive film layer in the battery laminated member, such that the connection firmness of the frame can be improved, thereby prolonging the service life of the photovoltaic module.

Description

Photovoltaic module and photovoltaic system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese application No. 2023224628182 filed on September 11, 2023, the contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic module and a photovoltaic system. Background Art

[0004] With the development of industry, new energy sources are gaining increasing attention, and the use of solar energy is becoming increasingly common. As the core component of solar power generation, solar photovoltaic modules mainly consist of solar cell laminates and frames. The edges of the solar cell laminates are accommodated in the notches of the frame, and the photovoltaic modules are mounted on the bracket through their frame.

[0005] In traditional photovoltaic module manufacturing, the front glass, film layer, solar cells, and back glass are first heat-pressed to form a laminate. A frame is then bonded to the outer edges of the laminate using a sealant to protect the laminate. However, this traditional photovoltaic module manufacturing method involves numerous steps and suffers from poor adhesion between the frame and the laminate.

[0006] Application Contents

[0007] The present application aims to provide a photovoltaic module and a photovoltaic system, which can at least solve the problem that the traditional photovoltaic module processing method has many steps and poor bonding effect between the frame and the laminate.

[0008] In order to solve the above technical problems, this application is implemented as follows:

[0009] In a first aspect, the present application provides a photovoltaic module comprising: a cell stack and a frame;

[0010] The frame at least covers part or all of the circumferential side wall of the battery stack; the battery stack is provided with a film layer, and part or all of the edges of the film layer extend between the frame and the battery stack.

[0011] Optionally, the battery stack includes a front plate, battery cells and a back plate stacked in sequence; the adhesive film layer includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is connected between the front plate and the back plate, the battery cells are embedded in the first connecting portion, the second connecting portion is provided between the frame and the battery stack, and the frame is connected to the battery stack through the second connecting portion.

[0012] Optionally, the second connecting portion includes a first extension portion connected to the first connecting portion, the frame includes a first side portion, and the first side portion surrounds and covers the outside of part or all of the circumferential side wall; part or all of the edge of the film layer extends between the first side portion and the circumferential side wall to form the first extension portion.

[0013] Optionally, the second connecting portion also includes a second extension portion connected to the first extension portion, and the frame also includes a second side portion connected to the first side portion, and the second side portion covers the four edges of the back panel; part or all of the edge of the film layer extends between the second side portion and the back panel to form the second extension portion.

[0014] Optionally, the second connecting portion also includes a third extension portion connected to the first extension portion, and the frame also includes a third side portion, the third side portion is connected to the side of the first side portion facing away from the second side portion, the third side portion covers the four edges of the front panel, and part or all of the edge of the film layer extends between the third side portion and the front panel to form a third extension portion.

[0015] Optionally, the frame includes a plurality of connecting members, which enclose the frame and enclose the first side portion and the second side portion; or, the first side portion and the second side portion are integrally formed.

[0016] Optionally, the frame includes a plurality of connecting members, which are combined to form the frame, and the plurality of connecting members are combined to form the first side portion, the second side portion and the third side portion; or, the third side portion is integrally formed.

[0017] Optionally, an orthographic projection of the third side portion on the front panel and an orthographic projection of the battery cell on the front panel are staggered.

[0018] Optionally, an orthographic projection of the second side portion on the back panel and an orthographic projection of the battery cell on the back panel are staggered.

[0019] Optionally, the first side portion, the second side portion, and the third side portion have the same thickness and are all a preset thickness H mm, satisfying: 0.3≤H≤3.

[0020] Optionally, the first extension portion and the first connection portion are integrally formed.

[0021] Optionally, the first extending portion, the second extending portion and the first connecting portion are integrally formed.

[0022] Optionally, the first extending portion, the second extending portion, the third extending portion and the first connecting portion are integrally formed.

[0023] Optionally, the one-piece molding is hot pressing one-piece molding.

[0024] Optionally, the first extension portion, the second extension portion and the third extension portion are made of at least one of POE, EVA and PVB; and / or the first side portion, the second side portion and the third side portion are all in a quadrilateral frame structure.

[0025] Optionally, the photovoltaic module is formed by laminating at least the cell stack and the adhesive film layer.

[0026] Optionally, the photovoltaic module is formed by laminating at least the cell stack, the adhesive film layer and the frame.

[0027] In a second aspect, the present application proposes a photovoltaic system, comprising a support member and the photovoltaic assembly described in any one of the first aspects above, wherein the support member is connected to the frame.

[0028] In an embodiment of the present application, a frame is wrapped around at least part or all of the circumferential sidewalls of the battery stack. A film layer is provided in the battery stack to extend between the frame and the battery stack, so that the film layer can be used to achieve adhesive fixation between the frame and the battery stack. This facilitates adhesive fixation of the frame while laminating or hot pressing the battery stack, helping to simplify the processing process and improve production efficiency. Furthermore, using the film layer in the battery stack to adhesively fix the frame can improve the frame's connection security and extend the service life of the photovoltaic module.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] FIG1 is a schematic diagram of a partial structure of a photovoltaic assembly according to an embodiment of the present application;

[0032] FIG2 is a schematic diagram of a partial structure of a photovoltaic module before lamination according to an embodiment of the present application;

[0033] FIG3 is a schematic diagram of a partial structure of another photovoltaic assembly according to an embodiment of the present application;

[0034] FIG4 is a schematic diagram of a partial structure of another photovoltaic module before lamination according to an embodiment of the present application;

[0035] FIG5 is a schematic diagram of a partial structure of another photovoltaic assembly according to an embodiment of the present application;

[0036] FIG6 is a schematic diagram of a partial structure of another photovoltaic module before lamination according to an embodiment of the present application;

[0037] FIG7 is a schematic structural diagram of a battery stack according to an embodiment of the present application;

[0038] FIG8 is a schematic diagram of a partial structure of another photovoltaic assembly according to an embodiment of the present application;

[0039] FIG9 is a schematic diagram of a photovoltaic system according to an embodiment of the present application.

[0040] Reference numerals:

[0041] 100: Battery stack; 110: Adhesive film layer; 111: First connecting portion; 112: Second connecting portion; 112a: First extension portion; 112b: Second extension portion; 112c: Third extension portion; 113: First film layer; 114: Second film layer; 120: Front plate; 130: Battery cell; 140: Back plate; 200: Frame; 210: First side portion; 220: Second side portion; 230: Third side portion; 300: Support member. DETAILED DESCRIPTION

[0042] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0046] The photovoltaic module provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0047] As shown in Figure 1, a photovoltaic module in some embodiments of the present application includes a cell stack 100 and a frame 200; the frame 200 at least covers part or all of the circumferential side wall of the cell stack 100; a film layer 110 is provided in the cell stack 100, and part or all of the edges of the film layer 110 extend between the frame 200 and the cell stack 100.

[0048] In an embodiment of the present application, the frame 200 is at least covered on part or all of the circumferential side walls of the battery stack 100, and the adhesive film layer 110 in the battery stack 100 is extended between the frame 200 and the battery stack 100 so that the adhesive film layer 110 can be used to achieve bonding and fixing between the frame 200 and the battery stack 100. This facilitates bonding and fixing the frame 200 while performing lamination or hot pressing of the battery stack 100, which helps to simplify the processing process and improve production efficiency. In addition, using the adhesive film layer 110 in the battery stack 100 to bond and fix the frame 200 can improve the connection firmness of the frame 200 and increase the service life of the photovoltaic module. It should be noted that the at least covering in this application includes partial covering or full covering; the extension includes extending upward and / or downward to achieve matching of the connection between the adhesive film layer and the frame. The specific meaning can also be understood according to actual conditions, and the embodiment of the present application does not limit this.

[0049] Specifically, the photovoltaic module may include a cell stack 100 and a frame 200, wherein the cell stack 100 has a circumferential side wall, and the frame 200 is arranged around the cell stack 100, and the frame 200 at least covers part or all of the circumferential side wall of the cell stack 100, so as to protect part or all of the circumferential side wall of the cell stack 100 through the frame 200.

[0050] It should be noted that, in addition to covering the circumferential side walls of the battery stack 100 , the frame 200 can also cover other parts of the battery stack 100 close to the edges. The specific structure of the frame 200 can be flexibly set according to actual needs, and the embodiment of the present application does not limit this.

[0051] Among them, the battery stack 100 is provided with a film layer 110, and the film layer 110 can be used to achieve the bonding and fixation of various components in the battery stack 100. At the same time, part or all of the edges of the film layer 110 are extended between the battery stack 100 and the frame 200, so that the extended part of the film layer 110 can be used to bond and fix the frame 200 and the battery stack 100.

[0052] In a specific application, taking all edges as an example, as shown in FIG7 , the adhesive film layer 110 in the battery stack 100 is stacked and assembled with other components, and all edges around the adhesive film layer 110 can be lengthened so that all edges around the adhesive film layer 110 extend beyond other components to obtain a stacked structure. Furthermore, the frame 200 is wrapped around part or all of the circumferential side walls of the stacked structure so that the extended portion of the adhesive film layer 110 is between the frame 200 and the stacked structure. Then, the stacked structure and the frame 200 are placed together in a laminating device for hot pressing. After the adhesive film layer 110 is softened by heat, the stacked components can be bonded together to form a photovoltaic module. At the same time, the softened adhesive film layer 110 can also bond and fix the frame 200 to the battery stack 100. It should be noted that after the hot pressing forming is completed in the laminating equipment, the film layer can also be subjected to post-processing such as trimming to make the film layer match the battery stack 100, and it can also reduce the film layer's excessive length that affects the appearance of the photovoltaic module or blocks the photovoltaic module cell.

[0053] Optionally, the photovoltaic module is formed by laminating at least a battery stack 100 and an adhesive film layer 110. The lamination of the battery stack 100 and the adhesive film layer 110 is achieved through a single lamination process. Specifically, the photovoltaic module is formed by hot pressing at least the battery stack 100 and the adhesive film layer 110 in a lamination device. Compared to the traditional method of first laminating the laminated components and then gluing and fixing the frame 200, this method can simplify the processing steps and improve production efficiency. It should be noted that the aforementioned lamination process may include subsequent integral molding of the first connecting portion and / or the second connecting portion of the adhesive film layer 110.

[0054] Optionally, the photovoltaic module is formed by laminating at least a battery stack 100, a film layer 110, and a frame 200. In the embodiment of the present application, the photovoltaic module is formed by hot pressing at least a battery stack 100, a film layer 110, and a frame 200 in a laminating device through a one-time lamination process, thereby achieving the lamination of the battery stack 100, the film layer 110, and the frame 200. Thus, while laminating the battery stack 100 and the film layer 110, the connection and fixation between the frame 200 and the battery stack 100 can be achieved. Compared with the traditional method of first laminating the laminate and then gluing and fixing the frame 200, the processing procedure can be greatly simplified, which helps to improve production efficiency. It should be noted that the above-mentioned lamination formation may also include the subsequent integral molding of the first connecting portion and / or the second connecting portion of the film layer 110.

[0055] In addition, in the photovoltaic module of the embodiment of the present application, the adhesive film layer 110 located between the frame 200 and the edge portion of the battery stack 100 is an integrated structure with the adhesive film layer 110 inside the battery stack 100, thereby improving the overall connection strength of the photovoltaic module and increasing the service life of the photovoltaic module.

[0056] Optionally, the adhesive film layer 110 can be formed by thermoforming at least two film layers. Specifically, the adhesive film layer 110 can be formed by thermoforming at least two film layers in a laminating device. For example, as shown in FIG7 , the adhesive film layer 110 can include a first film layer 113 and a second film layer 114 , with portions or all of the edges of the first film layer 113 and / or the second film layer 114 extending between the frame 200 and the battery stack 100 .

[0057] In a specific application, taking all edges as an example, as shown in Figure 7, the front panel 120, the first film layer 113, the battery cell 130, the second film layer 114 and the back panel 140 can be stacked together in sequence, wherein all edges around the first film layer 113 and / or the second film layer 114 are provided with extended portions, and the extended portions of the first film layer 113 and / or the second film layer 114 are bent toward the position corresponding to the frame 200, and then the frame 200 is wrapped around the battery stack 100, so that the extended portions of the first film layer 113 and / or the second film layer 114 are clamped between the frame 200 and the battery stack 100.

[0058] Then, the battery stack 100 and the frame 200 are placed together in a lamination device for forward or reverse hot pressing, so that the first film layer 113 and the second film layer 114 are softened by heat, thereby achieving bonding and fixing between the battery cell 130 and the front panel 120 and the back panel 140, as well as bonding and fixing between the frame 200 and the battery stack 100.

[0059] The first film layer 113 and the second film layer 114 can be made of the same material or different materials.

[0060] For example, the first film layer 113 and the second film layer 114 can be made of at least one of polyolefin elastomer (POE), ethylene-vinyl acetate copolymer (EVA), and polyvinyl butyral (PVB).

[0061] Of course, the specific materials used to make the first film layer 113 and the second film layer 114 can be set according to the performance requirements of the photovoltaic module, and this embodiment of the present application does not limit this.

[0062] It should be noted that in the production process of photovoltaic modules, the film layer 110 can be formed by hot pressing one or more film layers. The composition structure of the film layer 110 can be flexibly set according to actual needs, and the embodiments of the present application do not limit this.

[0063] Optionally, as shown in Figure 1, the battery stack 100 includes a front plate 120, a battery cell 130 and a back plate 140 stacked in sequence; the film layer 110 includes a first connecting portion 111 and a second connecting portion 112 connected to each other, the first connecting portion 111 is connected between the front plate 120 and the back plate 140, the battery cell 130 is embedded in the first connecting portion 111, and the second connecting portion 112 is arranged between the frame 200 and the battery stack 100, and the frame 200 is connected to the battery stack 100 through the second connecting portion 112.

[0064] In the embodiment of the present application, the battery stack 100 includes a front plate 120, a battery cell 130, and a back plate 140. The first connecting portion 111 of the adhesive film layer 110 is connected between the front plate 120 and the back plate 140. The battery cell 130 is embedded in the first connecting portion 111. The first connecting portion 111 enables adhesive fixation between the battery cell 130 and the front plate 120 and the back plate 140. At the same time, the second connecting portion 112 is connected between the frame 200 and the battery stack 100. The second connecting portion 112 enables adhesive fixation between the frame 200 and the battery stack 100.

[0065] Specifically, the first connecting portion 111 and the second connecting portion 112 of the adhesive film layer 110 are integrally formed, and the second connecting portion 112 can be connected between the frame 200 and a portion of the circumferential sidewalls of the front panel 120 or all of the circumferential sidewalls, and between the frame 200 and a portion of the circumferential sidewalls of the back panel 140 or all of the circumferential sidewalls. The integrally formed structure of the first connecting portion 111 and the second connecting portion 112 provides better bonding performance, thereby improving the overall connection strength of the photovoltaic module.

[0066] It is understandable that the structure and size of the second connection portion 112 can be set according to the matching structure between the frame 200 and the battery stack 100, and the embodiment of the present application does not limit this.

[0067] In some embodiments, the front panel 120 may be made of a light-transmitting material. For example, the front panel 120 may be made of inorganic glass or organic glass, so that light can pass through the front panel 120 and illuminate the surface of the battery cell 130 .

[0068] The back plate 140 can be made of the same material as the front plate 120, or a different material from the front plate 120. The specific materials of the front plate 120 and the back plate 140 can be flexibly selected according to the specific structural design of the photovoltaic module, and the embodiments of the present application do not limit this.

[0069] Optionally, as shown in Figure 3, the second connecting portion 112 includes a first extension portion 112a connected to the first connecting portion 111, the frame 200 includes a first side portion 210, the battery stack 100 has a circumferential side wall, and the first side portion 210 surrounds and wraps around the outside of part or all of the circumferential side wall; part or all of the edge of the film layer 110 extends between the first side portion 210 and the circumferential side wall to form the first extension portion 112a.

[0070] In an embodiment of the present application, the frame 200 includes a first side portion 210, which surrounds and covers the outer side of part or all of the circumferential side walls of the battery stack 100 to protect the battery stack 100 on all sides, and extends part or all of the edges of the adhesive film layer 110 to form a first extension portion 112a between the first side portion 210 and the side wall, so as to utilize the first extension portion 112a to bond and fix the frame 200 and the battery stack 100.

[0071] In a specific application, taking the entire edge as an example, as shown in FIG4 , the adhesive film layer 110 can be formed by hot-pressing and integrally molding at least a first film layer 113 and a second film layer 114. During the production process, the front panel 120, the first film layer 113, the solar cell 130, the second film layer 114, and the back panel 140 can be sequentially stacked together to form a laminate. The first film layer 113 and the second film layer 114 are provided with extensions along all edges. The extensions of the first film layer 113 are bent toward the front panel 120, and the extensions of the second film layer 114 are bent toward the back panel 140. The first side portion 210 of the frame 200 is then wrapped around the outside of the extensions of the first film layer 113 and the second film layer 114. A photovoltaic module can then be obtained through lamination or hot-pressing.

[0072] It can be considered that the first side portion 210 is connected around the circumferential side wall of the battery stack 100, which not only protects the periphery of the battery stack 100 and prevents the periphery of the battery stack 100 from being damaged by collisions, but also seals the battery stack 100, thereby reducing the infiltration of moisture and the like into the battery stack 100.

[0073] Optionally, the first extension portion 112a and the first connection portion 111 are integrally formed. Specifically, the first extension portion 112a and the first connection portion 111 can be integrally formed by hot pressing, that is, the first extension portion 112a and the first connection portion 111 are formed into one piece after hot pressing, which can be included in the above two lamination forming methods.

[0074] In the embodiment of the present application, the first extending portion 112 a and the first connecting portion 111 are formed in an integrally formed manner, which can simplify the processing steps and improve the connection strength between the first extending portion 112 a and the first connecting portion 111 .

[0075] The first extension portion 112a and the first connection portion 111 can be made of at least one of POE, EVA, and PVB. Of course, the first extension portion 112a and the first connection portion 111 can also be made of other materials, which is not limited in this embodiment of the present application.

[0076] Optionally, as shown in Figure 1, the second connecting portion 112 also includes a second extension portion 112b connected to the first extension portion 112a, and the frame 200 also includes a second side portion 220 connected to the first side portion 210, and the second side portion 220 covers the four edges of the back panel 140; part or all of the edge of the film layer 110 extends between the second side portion 220 and the back panel 140 to form the second extension portion 112b.

[0077] In the embodiment of the present application, the first side portion 210 and the second side portion 220 are connected to form a frame 200. The first side portion 210 and the second side portion 220 are used to surround and cover the battery stack 100 to protect the battery stack 100. The frame 200 is bonded and fixed to the battery stack 100 by the first extension portion 112a and the second extension portion 112b. The use of the frame 200 structure in the embodiment of the present application can improve the strength of the frame 200, thereby improving the protection of the battery stack 100. At the same time, the second side portion 220 is provided to cover the edges of the back plate 140 to reduce the second side portion 220 from blocking the light-receiving surface of the photovoltaic module, thereby ensuring the photovoltaic conversion performance of the photovoltaic module.

[0078] Furthermore, during the use of the photovoltaic module, the photovoltaic module is placed with the side of the front plate 120 facing upward. Impurities are usually deposited on one side of the front plate 120, and the surface of the photovoltaic module needs to be regularly cleaned. By wrapping the frame 200 around the circumferential side walls of the cell stack 100 and the edges of the back plate 140, the cell stack 100 is protected while avoiding the impact of impurity removal on the front of the photovoltaic module. It should be noted that the edges of the back plate 140 include the edges of the bottom surface of the back plate 140, which are also clearly shown in the figure.

[0079] Specifically, the frame 200 includes a first side portion 210 and a second side portion 220. The first side portion 210 and the second side portion 220 are connected to each other to form an L-shaped groove in cross section. The four edges of the battery stack 100 are located in the L-shaped groove, and part of the edge or all of the four edges of the adhesive film layer 110 in the battery stack 100 extend into the L-shaped groove to bond and fix the frame 200.

[0080] In a specific application, taking the entire edge as an example, as shown in FIG2 , the adhesive film layer 110 can be formed by hot pressing at least a first film layer 113 and a second film layer 114. During the production process, the front panel 120, the first film layer 113, the battery cell 130, the second film layer 114, and the back panel 140 are stacked together in sequence, and then the extended portion of the first film layer 113 or the second film layer 114 is bent generally toward the back panel 140. Then, the L-shaped groove of the frame 200 is wrapped around the four edges of the battery stack 100. Then, a photovoltaic module with a frame 200 can be obtained by forward or reverse hot pressing in a laminating device. Forward hot pressing is hot pressing with the front panel as the front face, and reverse hot pressing is hot pressing with the back panel as the front face.

[0081] It is understood that the dimensions of the extended portions of the first film layer 113 and the second film layer 114 can be adapted to the dimensions of the frame 200, so that after forward or reverse hot pressing, the first film layer 113 and / or the second film layer 114 can fully flow and fill between the frame 200 and the battery stack 100, thereby achieving a bonding and fixing effect on the frame 200. It should be noted that forward or reverse hot pressing is performed according to actual needs and is not limited in this embodiment of the present application.

[0082] Optionally, the first extension portion 112a, the second extension portion 112b, and the first connecting portion 111 are integrally formed. Specifically, the first extension portion 112a, the second extension portion 112b, and the first connecting portion 111 are integrally formed by hot pressing, that is, the first extension portion 112a, the second extension portion 112b, and the first connecting portion 111 are formed into one piece after hot pressing, which can be included in the above two lamination methods.

[0083] In the embodiment of the present application, the first extension portion 112a, the second extension portion 112b and the first connection portion 111 are formed in an integrated manner, which can not only simplify the processing process but also improve the connection strength of the first extension portion 112a, the second extension portion 112b and the first connection portion 111.

[0084] The second extension portion 112b can be made of at least one of POE, EVA, and PVB. Of course, the second extension portion 112b can also be made of other materials, which is not limited in this embodiment of the present application.

[0085] Optionally, the frame includes a plurality of connectors, and the plurality of connectors are combined to form the frame, and the plurality of connectors are combined to form the first side portion and the second side portion. As shown in FIG1 , the frame may include four connectors, and the four connectors are all L-shaped connectors. The lengths of the four L-shaped connectors may be equal or unequal to each other. The four L-shaped connectors are combined to form the frame 200 of the photovoltaic module, and the frame 200 has a protective effect on the photovoltaic module as a whole. After the four L-shaped connectors are combined to form the frame 200, a first side portion surrounding and covering the outer side of the circumferential side wall of the battery stack 100 and a second side portion covering the four edges of the back plate 140 are generated. Overall, the first side portion 210 of the frame 200 is connected to the second side portion 220.

[0086] In other embodiments, the first side portion 210 and the second side portion 220 are integrally formed, which facilitates actual processing and assembly, and can also increase the connection strength between the first side portion 210 and the second side portion 220. Overall, the first side portion 210 and the second side portion 220 both have a quadrilateral frame structure.

[0087] In some embodiments, the first side portion 210 and the second side portion 220 may be set to have equal thickness, thereby ensuring relatively uniform mechanical strength of various parts of the frame 200 and improving the uniformity of the frame 200's protection of the edges of the battery stack 100.

[0088] In some examples, the first side portion 210 and the second side portion 220 have the same thickness, and the thickness can be set to 0.3 mm-3 mm. Specifically, the thickness can be set to any value such as 0.3 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, or 3 mm.

[0089] The thicknesses of the first side portion 210 and the second side portion 220 are equal and can be measured using a vernier caliper or other measuring tools, which is not limited in this embodiment of the present application.

[0090] Optionally, as shown in Figure 5, the second connecting portion 112 also includes a third extension portion 112c connected to the first extension portion 112a, and the frame 200 also includes a third side portion 230, the third side portion 230 is connected to the side of the first side portion 210 away from the second side portion 220, the third side portion 230 covers the four edges of the front panel 120, and part or all of the edge of the film layer 110 extends between the third side portion 230 and the front panel 120 to form the third extension portion 112c.

[0091] In the embodiment of the present application, by respectively providing a second side portion 220 and a third side portion 230 on both sides of the first side portion 210, the frame 200 is used to simultaneously protect the four side walls of the battery stack 100, the four edges of the front plate 120, and the four edges of the back plate 140. At the same time, part or all of the edges of the adhesive film layer 110 extend between the frame 200 and the battery stack 100 to bond and fix the frame 200 to the battery stack 100. In this way, the protective effect of the frame 200 on the four sides of the battery stack 100 can be improved, thereby preventing water vapor and the like from penetrating into the battery stack 100, and avoiding damage such as bumps on the edge portions of the battery stack 100. It should be noted that the four edges of the front plate 120 include the four edges of the top surface of the front plate 120, which is also clear in the figure.

[0092] Specifically, the second side portion 220 and the third side portion 230 are respectively connected to the two sides of the first side portion 210, and the first side portion 210, the second side portion 220 and the third side portion 230 are enclosed to form a C-shaped groove in cross section. The four edges of the battery stack 100 will be located in the C-shaped groove, and part or all of the edges of the film layer 110 will extend into the C-shaped groove to bond and fix the frame 200 to the battery stack 100.

[0093] In a specific application, taking the entire edge as an example, as shown in FIG6 , the adhesive film layer 110 can be formed by thermoforming at least the first film layer 113 and the second film layer 114. Specifically, the adhesive film layer 110 can be formed by thermoforming at least the first film layer 113 and the second film layer 114 in a laminating device. During the production process, the front panel 120, the first film layer 113, the battery cell 130, the second film layer 114, and the back panel 140 are stacked together in sequence, wherein the first film layer 113 and the second film layer 114 are both provided with an extension portion. The extension portion of the first film layer 113 is bent toward the front panel 120, and the extension portion of the second film layer 114 is bent toward the back panel 140, thereby wrapping the frame 200 around the four edges of the battery stack 100. Then, a photovoltaic module having the frame 200 can be obtained by thermoforming in the laminating device.

[0094] It can be understood that the size of the extended parts of the first film layer 113 and the second film layer 114 can be adapted to the size of the frame 200, so that after hot pressing, the extended parts of the first film layer 113 and the second film layer 114 can fully fill and flow between the frame 200 and the battery stack 100, thereby achieving the bonding and fixing effect on the frame 200.

[0095] Optionally, the first extension portion 112a, the second extension portion 112b, the third extension portion 112c, and the first connecting portion 111 are integrally formed. Specifically, the first extension portion 112a, the second extension portion 112b, the third extension portion 112c, and the first connecting portion 111 can be integrally formed by hot pressing, that is, the first extension portion 112a, the second extension portion 112b, the third extension portion 112c, and the first connecting portion 111 are formed into one piece after hot pressing, which can be included in the above two lamination forming methods.

[0096] In the embodiment of the present application, the first extension portion 112a, the second extension portion 112b, the third extension portion 112c and the first connection portion 111 are formed by one-piece molding, which can not only simplify the processing process, but also improve the connection strength of the first extension portion 112a, the second extension portion 112b, the third extension portion 112c and the first connection portion 111.

[0097] The third extension portion 112c can be made of at least one of POE, EVA, and PVB. Of course, the third extension portion 112c can also be made of other materials, which is not limited in this embodiment of the present application.

[0098] Optionally, the frame includes a plurality of connectors, and the plurality of connectors enclose the frame, and the plurality of connectors enclose to form the first side portion, the second side portion and the third side portion. As shown in FIG5 , the frame may include four connectors, and the four connectors are all C-shaped connectors. The lengths of the four C-shaped connectors may be equal or unequal to each other. The four C-shaped connectors enclose the frame 200 of the photovoltaic module, and the frame 200 protects the photovoltaic module as a whole. After the four C-shaped connectors are enclosed to form the frame, a first side portion surrounding and covering the outer side of the circumferential side wall of the battery stack 100, a second side portion covering the four edges of the back plate 140, and a third side portion covering the four edges of the front plate 120 are generated. Overall, the first side portion 210 of the frame 200 is connected to the second side portion 220 and the third side portion 230.

[0099] It is understood that, as shown in FIG8 , the frame 200 in the present application includes a first side portion 210 and a third side portion 230. The first side portion 210 and the third side portion 230 are in a quadrilateral frame structure, and the second side portion 220 is also in a quadrilateral frame structure, which can be used to facilitate connection of the photovoltaic module with other components through the frame 200. The specific structure of the frame 200 can be set according to actual needs and is not limited in this embodiment of the present application.

[0100] In other embodiments, the third side portion 230 is integrally formed, and the first side portion 210 and the second side portion 220 are integrally formed; or, the second side portion 220 is integrally formed, and the first side portion 210 and the third side portion 230 are integrally formed, which facilitates actual processing and assembly and also increases the connection strength of the third side portion 230.

[0101] Optionally, the first side portion 210 , the second side portion 220 and the third side portion 230 have the same thickness and are all a preset thickness H mm, satisfying: 0.3≤H≤3.

[0102] In the embodiment of the present application, the first side portion 210, the second side portion 220, and the third side portion 230 are all quadrilateral frame structures, or they can all be plate-like structures. By setting the thickness of the first side portion 210, the second side portion 220, and the third side portion 230 to be equal, the mechanical strength of each part of the frame 200 is ensured to be relatively uniform, thereby improving the uniformity of the frame 200's protection of the edges of the battery stack 100. Furthermore, by setting a reasonable range of thickness, while ensuring the mechanical strength of the frame 200, material waste is reduced, saving processing costs.

[0103] It is understood that if the thickness of the first side portion 210, the second side portion 220, and the third side portion 230 is too thin, the mechanical strength of the frame 200 will be reduced, and the edges of the battery stack 100 will not be effectively protected. If the thickness of the first side portion 210, the second side portion 220, and the third side portion 230 is too thick, the loss of processing materials will increase, and the processing cost will also be increased. At the same time, if the thickness is too thick, it will also affect the heat conduction during the hot pressing process and affect the bonding effect of the adhesive film layer 110.

[0104] In some embodiments, the thickness H of the first side portion 210 , the second side portion 220 and the third side portion 230 can be set to any value such as 0.3 mm, 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, or a range between any two values.

[0105] Optionally, as shown in FIG. 5 , the orthographic projection of the third side portion 230 on the front panel 120 and the orthographic projection of the battery cell 130 on the front panel 120 are staggered.

[0106] In an embodiment of the present application, the orthographic projection of the third side portion 230 on the front panel 120 is staggered from the orthographic projection of the battery cell 130 on the front panel 120 so that during the use of the photovoltaic module, the obstruction of the frame 200 on the side of the battery cell 130 facing the front panel 120 can be reduced, thereby improving the conversion efficiency of the photovoltaic module while ensuring the protective effect of the frame 200.

[0107] In practical applications, the side of the photovoltaic module where the front panel 120 is mounted is typically the light-receiving surface. When sunlight strikes the light-receiving surface of the photovoltaic module, the light passes through the front panel 120 and reaches the surface of the cell 130, causing the cell 130 to generate a photoelectric conversion effect and generate electricity. If there is an overlap between the orthographic projection of the third side portion 230 on the front panel 120 and the orthographic projection of the cell 130 on the front panel 120, the third side portion 230 corresponding to the overlapped area will block the cell 130, affecting the cell 130's ability to receive light.

[0108] The orthographic projection of the third side portion 230 on the front panel 120 refers to the projection area of ​​the third side portion 230 on the front panel 120 in a direction perpendicular to the plane of the front panel 120. The orthographic projection of the battery cell 130 on the front panel 120 refers to the projection area of ​​the battery cell 130 on the front panel 120 in a direction perpendicular to the plane of the front panel 120.

[0109] In some embodiments, the width of the third side portion 230 can be set to 6 mm-20 mm. Specifically, the width of the third side portion 230 can be set to any value such as 6 mm, 8 mm, 10 mm, 12 mm, 15 mm, 17 mm, or 20 mm.

[0110] Of course, the width of the third side portion 230 can be determined according to the structure of the solar cell 130 in the photovoltaic module, and those skilled in the art can set it according to actual needs.

[0111] Optionally, as shown in FIG. 1 and FIG. 5 , the orthographic projection of the second side portion 220 on the back plate 140 and the orthographic projection of the battery cell 130 on the back plate 140 are staggered.

[0112] In an embodiment of the present application, the orthographic projection of the second side portion 220 on the back panel 140 is staggered with the orthographic projection of the battery cell 130 on the back panel 140 so that during the use of the photovoltaic module, the obstruction of the frame 200 on the side of the battery cell 130 facing the back panel 140 can be reduced.

[0113] It is understood that a photovoltaic module can generate electricity by receiving light from a single side or from both sides simultaneously. When both sides of a photovoltaic module receive light, sunlight shines on the backsheet 140, and the light can pass through the backsheet 140 and reach the surface of the solar cell 130, generating a photoelectric conversion effect.

[0114] By setting the orthographic projection of the second side portion 220 on the back plate 140 to be staggered with the orthographic projection of the battery cell 130 on the back plate 140, the obstruction of the second side portion 220 on the side of the battery cell 130 facing the back plate 140 can be reduced, thereby increasing the amount of light received by the battery cell 130 from the side of the back plate 140.

[0115] The orthographic projection of the second side portion 220 on the back plate 140 refers to the projection area of ​​the second side portion 220 on the back plate 140 in a direction perpendicular to the plane of the back plate 140. The orthographic projection of the battery cell 130 on the back plate 140 refers to the projection area of ​​the battery cell 130 on the back plate 140 in a direction perpendicular to the plane of the back plate 140.

[0116] In some embodiments, the width of the second side portion 220 can be set to 6 mm-20 mm. Specifically, the width of the second side portion 220 can be set to any value such as 6 mm, 7 mm, 10 mm, 13 mm, 15 mm, 18 mm, or 20 mm.

[0117] Of course, the width of the second side portion 220 can be determined according to the structure of the solar cell 130 in the photovoltaic module, and those skilled in the art can set it according to actual needs.

[0118] Optionally, as shown in FIG9 , an embodiment of the present application further provides a photovoltaic system, comprising a support member 300 and the photovoltaic assembly in any of the above embodiments, wherein the support member 300 is connected to the frame 200 .

[0119] In the embodiment of the present application, there are multiple support members 300, for example, four support members 300, and the four support members 300 are respectively connected to the frame 200 to support the photovoltaic module.

[0120] In the embodiment of the present application, the frame 200 is at least covered over part or all of the circumferential sidewalls of the battery stack 100. By providing the adhesive film layer 110 in the battery stack 100 to extend between the frame 200 and the battery stack 100, the adhesive film layer 110 can be used to achieve adhesive fixation between the frame 200 and the battery stack 100. This facilitates adhesive fixation of the frame 200 while laminating or hot pressing the battery stack 100, helping to simplify the processing process and improve production efficiency. In addition, using the adhesive film layer 110 in the battery stack 100 to adhesively fix the frame 200 can improve the connection firmness of the frame 200 and extend the service life of the photovoltaic module.

[0121] Among them, the support member 300 is used to install and fix the photovoltaic component on the target object, which can be the ground, roof, workbench, etc. The specific structure of the support member 300 can be set according to the specific application scenario, and the embodiment of this application is not limited.

[0122] It should be noted that the photovoltaic system in the embodiment of the present application includes the photovoltaic module in any of the above embodiments. The specific structure of the photovoltaic module can be found in the above content, and the embodiment of the present application will not be repeated here.

[0123] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0124] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, comprising: battery stack and frame; The frame at least covers part or all of the circumferential side wall of the battery stack; The battery stack is provided with an adhesive film layer, and part of or all of the edges of the adhesive film layer extend between the frame and the battery stack.

2. The photovoltaic module according to claim 1, wherein the battery stack comprises a front plate, a battery sheet and a back plate stacked in sequence; The adhesive film layer includes a first connecting portion and a second connecting portion which are connected to each other, wherein the first connecting portion is connected between the front plate and the back plate, the battery cell is embedded in the first connecting portion, and the second connecting portion is disposed between the frame and the battery stack, and the frame is connected to the battery stack via the second connecting portion.

3. According to the photovoltaic module of claim 2, the second connecting portion includes a first extension portion connected to the first connecting portion, the frame includes a first side portion, and the first side portion surrounds and covers the outer side of part or all of the circumferential side wall; part or all of the edge of the film layer extends between the first side portion and the circumferential side wall to form the first extension portion.

4. According to the photovoltaic module of claim 3, the second connecting portion also includes a second extension portion connected to the first extension portion, the frame also includes a second side portion connected to the first side portion, and the second side portion covers the four edges of the back plate; part of the edge or the entire edge of the film layer extends between the second side portion and the back plate to form the second extension portion.

5. According to the photovoltaic module of claim 4, the second connecting portion also includes a third extension portion connected to the first extension portion, the frame also includes a third side portion, the third side portion is connected to a side of the first side portion away from the second side portion, the third side portion covers the four edges of the front panel, and part or all of the edge of the film layer extends between the third side portion and the front panel to form the third extension portion.

6. The photovoltaic assembly according to claim 4, wherein the frame comprises a plurality of connectors, the plurality of connectors enclose the frame, and the plurality of connectors enclose to form the first side portion and the second side portion; or the first side portion and the second side portion are integrally formed.

7. The photovoltaic assembly according to claim 5, wherein the frame comprises a plurality of connectors, the plurality of connectors are enclosed to form the frame, the plurality of connectors are enclosed to form the first side portion, the second side portion and the third side portion; or the third side portion is integrally formed. 8 . The photovoltaic assembly according to claim 5 , wherein an orthographic projection of the third side portion on the front panel and an orthographic projection of the solar cell on the front panel are staggered. 9 . The photovoltaic assembly according to claim 4 , wherein an orthographic projection of the second side portion on the back plate and an orthographic projection of the solar cell on the back plate are staggered with each other. 10 . The photovoltaic module according to claim 5 , wherein the first side portion, the second side portion and the third side portion have the same thickness and are all a preset thickness H mm, satisfying: 0.3≤H≤3. 11 . The photovoltaic assembly according to claim 3 , wherein the first extension portion and the first connection portion are integrally formed. 12 . The photovoltaic assembly according to claim 4 , wherein the first extending portion, the second extending portion, and the first connecting portion are integrally formed. 13 . The photovoltaic assembly according to claim 5 , wherein the first extending portion, the second extending portion, the third extending portion, and the first connecting portion are integrally formed.

14. The photovoltaic module according to claim 11, 12 or 13, wherein the integral molding is hot pressing integral molding.

15. According to the photovoltaic assembly shown in claim 5, the first extension portion, the second extension portion and the third extension portion are composed of at least one of POE, EVA, and PVB; and / or the first side portion, the second side portion and the third side portion are all in a quadrilateral frame structure. 16 . The photovoltaic module according to claim 1 , wherein the photovoltaic module is formed by laminating at least the cell stack and the adhesive film layer. 17 . The photovoltaic module according to claim 1 , wherein the photovoltaic module is formed by laminating at least the battery stack, the adhesive film layer and the frame.

18. A photovoltaic system, comprising a support member and the photovoltaic assembly according to any one of claims 1 to 17, wherein the support member is connected to the frame.

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