Photovoltaic module

Abstract

The utility model relates to a photovoltaic module which comprises a laminated part and a frame, the laminated part is provided with a first surface deviating from sunlight and a second surface intersecting with the first surface, the frame is arranged on the first surface, and a part of structure of the frame protrudes out of the second surface in the direction away from the laminated part. When the frame is connected with the clamp, the frame protrudes out of the laminated piece, so that the laminated piece avoids the clamp, the possibility that the laminated piece is bent, deformed and even broken due to interference between the laminated piece and the clamp is reduced, the service life of the whole photovoltaic module is prolonged, and normal and stable work of the photovoltaic module is guaranteed. Meanwhile, the frame is located on the backlight side of the laminated piece, so that the possibility that the light receiving surface of the laminated piece is shielded is reduced, and the efficiency of the photovoltaic module is improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cells, and in particular to a photovoltaic module. Background Art

[0002] Photovoltaic modules can convert the received solar energy into electrical energy. When photovoltaic modules are installed on buildings, glass and other components in the photovoltaic modules are prone to interfere with the clamps, causing them to deform, break or even be damaged, which not only affects the normal installation of the photovoltaic modules, but also affects the service life of the photovoltaic modules. Utility Model Content

[0003] In view of this, the present application provides a photovoltaic assembly to solve the problem in the prior art that components in the photovoltaic assembly are prone to interfere with the clamp.

[0004] An embodiment of the present application provides a photovoltaic module, comprising: a laminate and a frame, wherein the laminate has a first surface facing away from sunlight and a second surface intersecting with the first surface; the frame is arranged on the first surface, and a partial structure of the frame protrudes from the second surface in a direction away from the laminate.

[0005] In a possible implementation, the frame has a first side wall; the first side wall protrudes from the second surface in a direction away from the laminate, and a distance D between an outer surface of the first side wall and the second surface satisfies: 0<D≤1mm.

[0006] In a possible implementation, the frame is disposed on both sides of the laminate along its own width direction; and / or the frame is disposed on both sides of the laminate along its own length direction.

[0007] In a possible implementation manner, the frame is connected to the first surface via an adhesive.

[0008] In a possible implementation, the laminate is provided with an edge binding structure; the edge binding structure is located on the second surface and extends in a direction away from the laminate.

[0009] In a possible implementation, a portion of the edge-binding structure protrudes from the frame in a direction away from the laminate.

[0010] In a possible implementation, the width W of the edge binding structure satisfies: 1 mm≤W≤2.5 mm.

[0011] In a possible implementation, along the thickness direction of the laminate, a cross-section of the edge binding structure is C-shaped.

[0012] In a possible implementation, the edging structure is connected to the frame via an adhesive.

[0013] In a possible implementation, the laminate includes a battery cell and a cover plate; the battery cell and the cover plate are connected via an adhesive film, and the adhesive film overflows in a direction away from the battery cell to form the edge wrapping structure.

[0014] The embodiment of the present application provides a photovoltaic module, including: a laminate and a frame, the laminate having a first surface facing away from sunlight and a second surface intersecting with the first surface, the frame being arranged on the first surface, and a part of the structure of the frame protruding from the second surface in a direction away from the laminate. The embodiment of the present application designs the installation position of the frame so that it exceeds the edge of the laminate. When the frame is connected to the clamp, since the frame protrudes from the laminate, the laminate avoids the clamp, reducing the possibility of interference between the laminate and the clamp causing the laminate to bend, deform or even break, thereby helping to extend the service life of the entire photovoltaic module and ensuring the normal and stable operation of the photovoltaic module. At the same time, the frame is located on the backlight side of the laminate, reducing the possibility of blocking the light-receiving surface of the laminate, so as to improve the efficiency of the photovoltaic module.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of a photovoltaic module provided in the first embodiment of the present application.

[0018] Figure 2 A schematic diagram of a photovoltaic module provided in accordance with the second embodiment of the present application.

[0019] Figure 3 A schematic diagram of a photovoltaic assembly provided in the third embodiment of the present application.

[0020] Reference numerals:

[0021] 1-Laminate;

[0022] 1a-first surface;

[0023] 1b-second surface;

[0024] 11-battery cell;

[0025] 12-cover plate;

[0026] 121- first cover plate;

[0027] 122- second cover plate;

[0028] 13-adhesive film;

[0029] 131-first adhesive film;

[0030] 132- second adhesive film;

[0031] 2-Border;

[0032] 21- a first side wall;

[0033] 21a-outer surface;

[0034] 3- Adhesive parts;

[0035] 4-Edge structure. DETAILED DESCRIPTION

[0036] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0039] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] like Figure 1 As shown, an embodiment of the present application provides a photovoltaic module, including: a laminate 1 and a frame 2, the laminate 1 has a first surface 1a facing away from sunlight and a second surface 1b intersecting with the first surface 1a, the frame 2 is arranged on the first surface 1a, and a part of the structure of the frame 2 protrudes from the second surface 1b in a direction away from the laminate 1.

[0041] Photovoltaic modules can convert solar energy into electrical energy. Along the thickness direction of the laminate 1, the side of the laminate 1 facing away from the sunlight is the first surface 1a, that is, the first surface 1a can be understood as the bottom surface of the laminate 1. The second surface 1b can be orthogonal to the first surface 1a, that is, the second surface 1b can be understood as the side of the laminate 1, wherein the second surface 1b can include the front side and the rear side (i.e., the front side and the rear side) of the laminate 1. Figure 1 The laminate 1 shown in FIG. 1 along the two side surfaces in the X direction), the left side surface and the right side surface (i.e., as shown in FIG. Figure 1 The frame 2 is arranged on the first surface 1a, that is, the frame 2 is arranged on the backlight surface of the laminate 1 in the embodiment of the present application. Compared with the solution of wrapping the frame 2 around the edge of the laminate 1 or arranging the frame 2 on the light-receiving surface of the laminate 1, the design of the embodiment of the present application reduces the possibility of the frame 2 blocking the light-receiving surface of the laminate 1, that is, reduces the shading area, which is beneficial to improve the efficiency of the photovoltaic module, and further improves the reliability of the entire photovoltaic component.

[0042] The frame 2 is provided to facilitate the installation of the photovoltaic module. For example, when the photovoltaic module is installed on the color steel tile, the frame 2 can be connected with the clamp (not shown in the figure) on the color steel tile to achieve the installation and fixation of the photovoltaic module. The edge of the frame 2 protrudes from the second surface 1b, such as Figure 1 As shown, the following description is made by taking the frame 2 installed on both sides of the laminate 1 in the width direction Y as an example. Along the width direction Y of the laminate 1, the edge portion of the frame 2 is located outside the second surface 1b of the laminate 1, that is, the edge portion of the frame 2 exceeds the second surface 1b, wherein there is a preset distance D between the edge portion of the frame 2 and the second surface 1b. When the frame 2 is connected to the clamp, since the frame 2 protrudes from the laminate 1, the laminate 1 avoids the clamp, so as to reduce the possibility of the laminate 1 being bent, deformed or even broken due to interference between the laminate 1 and the clamp, thereby helping to extend the service life of the entire photovoltaic module and ensuring the normal and stable operation of the photovoltaic module.

[0043] At present, in the process of installing photovoltaic modules, glass and other components in photovoltaic modules are easy to interfere with the clamps, which may cause the photovoltaic modules to be damaged, bent and deformed, or even cracked and exploded, affecting the normal use of photovoltaic modules and bringing certain difficulties to the installation of photovoltaic modules. The embodiment of the present application designs the installation position of the frame 2 so that it exceeds the edge of the laminate 1 to reduce the possibility of interference between the laminate 1 and the clamp, which is conducive to improving the service life of the photovoltaic module and facilitating the installation of the photovoltaic module. At the same time, the frame 2 is located on the backlight side of the laminate 1, reducing the possibility of blocking the light-receiving side of the laminate 1, so as to improve the efficiency of the photovoltaic module. Therefore, the photovoltaic module in the embodiment of the present application has a longer service life, higher reliability and is easy to install.

[0044] like Figure 1 As shown, in a possible embodiment, the frame 2 has a first side wall 21, which protrudes from the second surface 1b in a direction away from the laminate 1, and a distance D between an outer surface 21a of the first side wall 21 and the second surface 1b satisfies: 0<D≤1mm.

[0045] The first side wall 21 may be located outside the second surface 1b, that is, the first side wall 21 exceeds the second surface 1b. The spacing D between the outer surface 21a of the first side wall 21 and the second surface 1b may be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm or 1mm, and of course, it may be other values ​​within the above range. If the value of D is too large, most of the frame 2 is located outside the second surface 1b, which may easily lead to an unstable connection between the frame 2 and the laminate 1, making the two easily fall off from each other; at the same time, it also reduces the support and reinforcement effect of the frame 2 on the laminate 1, thereby affecting the stability and reliability of the entire photovoltaic module structure. Therefore, the embodiment of the present application sets the interval D at 0<D≤1mm, so that the laminate 1 can avoid the clamp while also helping to improve the stability of the connection between the laminate 1 and the frame 2, and at the same time enable the frame 2 to reliably support and reinforce the laminate 1, thereby helping to improve the stability and reliability of the photovoltaic module and extend the service life of the photovoltaic module.

[0046] In a possible implementation, the frame 2 is disposed on both sides of the laminate 1 along its own width direction Y; and / or, the frame 2 is disposed on both sides of the laminate 1 along its own length direction X.

[0047] The frame 2 can be arranged on the two long sides of the laminate 1, or the frame 2 can be arranged on the two short sides of the laminate 1. Specifically, the interval D between the frame 2 and the second surface 1b on both sides of the laminate 1 can be the same or different. In some embodiments, the frame 2 can also be arranged along the circumference of the laminate 1, that is, the frame 2 can also be enclosed in a "mouth" shape. According to the use requirements of the photovoltaic module, the frame 2 can also be enclosed in other shapes. Such a design is conducive to improving the protective effect of the frame 2 on the laminate 1, further reducing the possibility of the laminate 1 being damaged by collision with the outside world, so as to extend the service life of the photovoltaic module; at the same time, since the frame 2 can also play a role in supporting and reinforcing the laminate 1, the above design is also conducive to improving the overall stability of the photovoltaic module and the ability of the photovoltaic module to resist loads. In addition, since the frame can be connected to the clamp on the color steel tile, the above design is also convenient for the installation of the photovoltaic module.

[0048] like Figure 1 As shown, in a possible implementation, the frame 2 is connected to the first surface 1 a via an adhesive 3 .

[0049] The adhesive 3 may be a structural adhesive, such as polycarbonate adhesive, epoxy resin adhesive, silicone adhesive, acrylic adhesive, polyurethane adhesive, etc. The adhesive 3 may also be a solid adhesive such as a double-sided adhesive tape. By providing the adhesive 3, it is beneficial to achieve the bonding between the frame 2 and the laminate 1, thereby facilitating the stability and reliability of the connection between the frame 2 and the laminate 1, reducing the possibility of the frame 2 and the laminate 1 being separated from each other, thereby improving the stability of the overall structure of the photovoltaic module, so that the frame 2 can provide a stable and reliable protection effect for the laminate 1.

[0050] like Figure 1 and Figure 2 As shown, in a possible embodiment, the laminate 1 is provided with an edge structure 4 , and the edge structure 4 is located on the second surface 1 b and extends in a direction away from the laminate 1 .

[0051] The edging structure 4 can be located on two side surfaces of the laminate 1, such as the left side surface and the right side surface, or the front side surface and the rear side surface. The edging structure 4 can also be arranged around the circumference of the laminate 1, that is, all four sides of the laminate 1 are provided with the edging structure 4. The material of the edging structure 4 can also be metal, or plastic or silicone material, as long as it can protect and reinforce the edge of the laminate 1. The edging structure 4 protects the second surface 1b, further reducing the possibility of scratches or damage to the laminate 1. At the same time, the edging structure 4 also reinforces the laminate 1, which is beneficial to improve the mechanical properties of the entire laminate 1, that is, it can improve the overall load resistance of the photovoltaic module, reduce the possibility of bending, deformation, or breakage of the edge of the laminate 1, and further improve the service life of the entire photovoltaic module.

[0052] like Figure 2 As shown, in a possible embodiment, a portion of the edge structure 4 protrudes out of the frame 2 in a direction away from the laminate 1 .

[0053] The edge structure 4 can extend beyond the frame 2, combined with Figure 1 As shown, the outer edge of the edging structure 4 is located outside the outer surface 21a of the first side wall 21 of the frame 2. This design facilitates the positioning requirements of photovoltaic module production line equipment, thereby facilitating the processing and production of photovoltaic modules.

[0054] like Figure 2 As shown, in a possible implementation, the width W of the edge structure 4 satisfies: 1 mm ≤ W ≤ 2.5 mm.

[0055] The width W of the edging structure 4 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm or 2.5mm, and of course it can be other values ​​within the above range. If the width W of the edging structure 4 is less than 1mm, it is easy to reduce the protection and reinforcement effect of the edging structure 4 on the laminate 1, resulting in the possibility of scratches, cracks or deformation of the laminate 1 when interfering with the outside world, thereby reducing the service life of the photovoltaic module and affecting the normal operation of the photovoltaic module. If the width W of the edging structure 4 is greater than 2.5mm, it is easy to increase the weight of the laminate 1, that is, increase the weight of the photovoltaic module, which is not conducive to the installation and use of the photovoltaic module. At the same time, the excessive width of the edging structure 4 also makes the edging structure 4 easy to interfere with the clamp, thereby affecting the installation process of the photovoltaic module. Therefore, the embodiment of the present application limits the width W of the edging structure 4 to 1mm≤W≤2.5mm, so that the edging structure 4 can meet the protection and reinforcement needs of the laminate 1 while keeping the overall weight of the photovoltaic module within a reasonable range. At the same time, it also reduces the possibility of interference between the edging structure 4 and the clamp, thereby facilitating the installation and use of the photovoltaic module.

[0056] like Figure 2 As shown, in a possible embodiment, along the thickness direction of the laminate 1, the cross section of the edge structure 4 is C-shaped.

[0057] The cross-sectional shape of the edge structure 4 can be C-shaped, that is, the edge structure 4 has a rounded and non-angular outer surface 21a. This design is conducive to the possibility of the edge structure 4 being bumped or scratched by the outside world during the installation or transportation of the photovoltaic module, which is conducive to improving the stability of the edge structure 4 itself, thereby improving the reliability of the edge structure 4.

[0058] In some other embodiments, the cross-section of the edge wrapping structure 4 can be other shapes, such as "L" shape, "匚" shape, etc., and the specific shape can be designed according to the requirements of the laminate 1.

[0059] As Figure 2 shown, in a possible embodiment, the edge wrapping structure 4 is connected to the frame 2 through the adhesive 3.

[0060] The adhesive 3 can be structural adhesive or solid glue such as double-sided tape. The edge wrapping structure 4 is bonded to the frame 2 through the adhesive 3, which is beneficial to improving the stability of the setting of the edge wrapping structure 4 and reducing the possibility of the edge wrapping structure 4 falling off; on the other hand, such a design also improves the stability of the setting of the frame 2, increases the protection and support reinforcement effect of the frame 2 on the laminate 1, and thus is beneficial to improving the stability of the entire photovoltaic module structure.

[0061] In this embodiment, the edge wrapping structure 4 and the laminate 1 can be connected to the frame 2 through the same kind of colloid to facilitate the simplification of the installation process of the frame 2.

[0062] As Figure 3 shown, in a possible embodiment, the laminate 1 includes a cell 11 and a cover plate 12, and the cell 11 and the cover plate 12 are connected through a glue film 13, and the glue film 13 overflows in the direction away from the cell 11 to form the edge wrapping structure 4.

[0063] The cover plate 12 includes a first cover plate 121 and a second cover plate 122. The first cover plate 121 is located at the outermost layer of the laminate 1. Specifically, the first cover plate 121 can be glass with a high light transmittance. The second cover plate 122 is located at the lowermost layer of the laminate 1, that is, the second cover plate 122 is the backplane of the photovoltaic module. The second cover plate 122 can be made of glass, or the second cover plate 122 can also be formed by laminating and bonding multiple polymer films. The first cover plate 121 and the second cover plate 122 can protect the cell 11 and reduce the possibility of the cell 11 being mechanically damaged or eroded by the external environment, so as to be beneficial to improving the service life of the cell 11 and the entire photovoltaic module.

[0064] The first adhesive film 131 is located between the first cover plate 121 and the battery cell 11, and the second adhesive film 132 is located between the second cover plate 122 and the battery cell 11. The materials of the first adhesive film 131 and the second adhesive film 132 can be one or more of ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB), etc. The material of the first adhesive film 131 can be the same as that of the second adhesive film 132, or it can be different from the second adhesive film 132. The adhesive film 13 is used to encapsulate and protect the battery cell 11, and plays a certain bonding role.

[0065] In this embodiment, the stacked first cover plate 121, the first adhesive film 131, the battery cell 11, the second adhesive film 132 and the second cover plate 122 are placed in a laminator for lamination. During the lamination process, the adhesive film 13 will melt and solidify to bond the battery cell 11 and the cover plate 12 together. The edge structure 4 can be formed by the adhesive film 13 overflowing to the edge of the cover plate 12 during the lamination process. Specifically, the edge structure 4 can be formed by the first adhesive film 131, or by the second adhesive film 132, or the edge structure 4 can be formed by the first adhesive film 131 and the second adhesive film 132. Using the adhesive film 13 to form the edge structure 4 is conducive to simplifying the structure of the entire photovoltaic module and facilitating the steps of stacking and laminating the photovoltaic module; at the same time, the edge structure 4 can also protect the laminate 1 to extend the service life of the entire photovoltaic module.

[0066] This embodiment does not limit the structure of the battery cell 11. The types of the battery cell 11 include but are not limited to passivated emitter rear cell (Passivated Emitter Rear Cell, PERC), oxide passivated contact cell (Tunnel Oxide Passivated Contact, TOPCon), intrinsic thin film heterojunction cell (Heterojunction with Inter nsic Thin Film, HJT), interdigitated back contact cell (Interdigated Back Contact, IBC), perovskite cell, etc.

[0067] For PERC cells, along the thickness direction, PERC cells include front surface metal silver electrode, front surface silicon nitride passivation layer, phosphorus layer emitter, P-type base silicon layer, local aluminum back field, metal aluminum back electrode, back passivation layer (Al 2O3 / SiNx). PERC cells use a passivation film to passivate the back, replacing the full aluminum back field, enhancing the internal back reflection of light in the silicon base, reducing the recombination rate on the back, and increasing the efficiency of the cell by 0.5%-1%.

[0068] For TOPCon cells, along the thickness direction, TOPCon cells include metal silver electrodes, front surface silicon nitride passivation layers, boron-doped emitters, N-type base silicon layers, diffused doping layers, ultra-thin silicon oxide, doped polysilicon, silicon nitride, and metal silver electrodes. The back of the cell is composed of a layer of ultra-thin silicon oxide (1nm to 2nm) and a layer of phosphorus-doped microcrystalline amorphous mixed Si film, which together form a passivation contact structure. This structure can block the recombination of minority carrier holes and increase the open circuit voltage and short circuit current of the cell. The ultra-thin oxide layer allows majority electrons to tunnel into the polysilicon layer while blocking the recombination of minority carrier holes. The good passivation effect of ultra-thin silicon oxide and heavily doped silicon film causes the energy band on the silicon wafer surface to bend, thereby forming a field passivation effect, greatly increasing the probability of electron tunneling, reducing contact resistance, and increasing the open circuit voltage and short circuit current of the cell, thereby improving the cell conversion efficiency.

[0069] For HJT cells, along the thickness direction, the HJT cells include a front low-temperature silver electrode, a front conductive film, an N-type amorphous silicon film, an intrinsic amorphous silicon film, an N-type base silicon layer, an intrinsic amorphous silicon film, a P-type amorphous silicon film, a back conductive film, and a back low-temperature silver electrode.

[0070] For IBC cells, along the thickness direction, IBC cells include silicon nitride anti-layer, N+ front surface field, N-type base silicon layer, P+ emitter, N+ back field, aluminum oxide passivation layer, silicon nitride anti-reflection layer, and metal silver electrode. IBC cells use ion implantation technology to obtain P and N regions with good uniformity and precisely controllable junction depth. There is no grid line blocking on the front of the cell, which can eliminate the shading current loss of the metal electrode and achieve the maximum utilization of incident photons. The short-circuit current can be increased by about 7% compared with conventional solar cells; due to the back contact structure, there is no need to consider the grid line blocking problem, and the grid line ratio can be appropriately widened, thereby reducing the series resistance and having a high fill factor; the surface passivation and surface light trapping structure can be optimized to obtain a lower front surface recombination rate and surface reflection.

[0071] For perovskite cells, along the thickness direction, the perovskite cell includes substrate material, conductive film, electron transport layer (titanium dioxide), perovskite absorption layer (hole transport layer), and metal cathode. Perovskite materials have a high light absorption coefficient and a long carrier diffusion distance. After the photons absorbed by the perovskite material are converted into electrons, they are easily collected by the electrode with low loss, so they can generate higher photoelectric voltage and current, making perovskite show higher photoelectric conversion efficiency.

[0072] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A photovoltaic module, characterized in that: include: A laminate (1), the laminate (1) having a first surface (1a) facing away from sunlight and a second surface (1b) intersecting the first surface (1a); A frame (2), wherein the frame (2) is arranged on the first surface (1a), and a part of the structure of the frame (2) protrudes from the second surface (1b) in a direction away from the laminate (1).

2. The photovoltaic module according to claim 1, characterized in that: The frame (2) has a first side wall (21); The first side wall (21) protrudes from the second surface (1b) in a direction away from the laminate (1), and a distance D between an outer surface (21a) of the first side wall (21) and the second surface (1b) satisfies: 0<D≤1mm.

3. The photovoltaic module according to claim 1, characterized in that: The frame (2) is arranged on both sides of the laminate (1) along its own width direction; And / or, the frame (2) is arranged on both sides of the laminate (1) along its own length direction.

4. The photovoltaic module according to claim 1, characterized in that: The frame (2) is connected to the first surface (1a) via an adhesive (3).

5. The photovoltaic module according to any one of claims 1 to 4, characterized in that: The laminate (1) is provided with an edge binding structure (4); The edge binding structure (4) is located on the second surface (1b) and extends in a direction away from the laminate (1).

6. The photovoltaic module according to claim 5, characterized in that: Part of the structure of the edging structure (4) protrudes from the frame (2) in a direction away from the laminate (1).

7. The photovoltaic module according to claim 6, characterized in that: The width W of the edge binding structure (4) satisfies: 1 mm ≤ W ≤ 2.5 mm.

8. The photovoltaic module according to claim 5, characterized in that: Along the thickness direction of the laminate (1), the cross-section of the edge binding structure (4) is C-shaped.

9. The photovoltaic module according to claim 5, characterized in that: The edging structure (4) is connected to the frame (2) via an adhesive component (3).

10. The photovoltaic module according to claim 5, characterized in that: The laminate (1) comprises a battery cell (11) and a cover plate (12); The battery cell (11) and the cover plate (12) are connected via an adhesive film (13), and the adhesive film (13) overflows in a direction away from the battery cell (11) to form the edge wrapping structure (4).

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