Photovoltaic module backboard and photovoltaic module

Abstract

The embodiment of the utility model provides a photovoltaic assembly backboard and a photovoltaic assembly, and relates to the technical field of photovoltaic assemblies. The photovoltaic module backboard comprises a backboard main body, the backboard main body is in a non-rectangular shape and comprises a main body part located in the middle and an extension part which at least expands outwards towards one edge of the periphery, and the extension part can be bent; the backboard main body is covered with a water blocking layer, and the shape of the water blocking layer is the same as that of the backboard main body; and a bonding layer is arranged on the extension part of the waterproof layer. The bonding layer is used for being bonded with the peripheral wall of the photovoltaic module laminated part and / or the edge of the upper surface of the photovoltaic module laminated part so as to wrap the peripheral wall of the photovoltaic module laminated part, and the backboard main body is covered with a water blocking layer which is the same as the backboard main body in shape, so that water blocking sealing can be carried out on the peripheral wall of the laminated part and / or the edge of the upper surface of the laminated part. According to the scheme of the utility model, the overall sealing performance of the photovoltaic module backboard is improved, so that the moisture-proof capability is further improved.

Description

Technical Field

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

[0002] Photovoltaic modules convert solar energy into electrical energy and are mainly composed of glass, backsheet, cells, solder ribbons, and frames. The backsheet, the outer layer material on the back of the photovoltaic module, is a crucial component. It isolates the module from the external environment, providing electrical insulation that allows the module to operate outdoors for extended periods. The reliability and lifespan of the module are closely related to the quality of the backsheet. If the backsheet material fails, the encapsulation materials inside the module will be directly exposed to the harsh outdoor environment, leading to hydrolysis of the encapsulation materials, corrosion of the cells and solder ribbons, and delamination. This rapidly reduces the module's power output and lifespan, and in severe cases, can cause insulation failure, potentially resulting in fires and injuries.

[0003] The existing photovoltaic module backsheet has a technical problem of insufficient sealing, resulting in insufficient water vapor resistance. Utility Model Content

[0004] This utility model provides a photovoltaic module backsheet and a photovoltaic module, which can improve the overall sealing performance of the photovoltaic module backsheet, thereby further improving its waterproof and vapor-proof capabilities.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a photovoltaic module backsheet, which includes:

[0007] The back panel body is non-rectangular in shape, including a main body portion located in the middle and an extension portion extending outward to at least one side in all directions, the extension portion being bendable;

[0008] The back panel body is covered with a water-blocking layer, and the water-blocking layer has the same shape as the back panel body;

[0009] An adhesive layer is provided on the extended portion of the water-blocking layer.

[0010] Optionally, the main body of the backplate and the outwardly extending portions to opposite sides are both covered with the water-blocking layer; or,

[0011] The main body of the back panel and its outward extensions are both covered with the water-blocking layer.

[0012] Optionally, the photovoltaic module backsheet further includes a first protective layer, an adhesive layer, a reinforcement layer, and a second protective layer, wherein the first protective layer, the water-blocking layer, the adhesive layer, the reinforcement layer, and the second protective layer are stacked sequentially.

[0013] Optionally, the main body portion of the backplate and the extension portion extending outwards at least to one side are both covered with the adhesive layer and the reinforcing layer; or,

[0014] The main body portion of the back panel and the extended portion extending outward to at least one side are covered with the adhesive layer, the reinforcing layer, and the second protective layer.

[0015] Optionally, the outward extension of the back panel body is provided with a first vent.

[0016] Optionally, the back panel body has a first vent hole in the extension portion that expands outward to at least one side.

[0017] Optionally, there may be multiple first exhaust holes, which are arranged at intervals along the length of the back plate body.

[0018] Optionally, the backplate body has a chamfer between two adjacent extensions.

[0019] Optionally, the thickness of the water-blocking layer is 10μm-40μm.

[0020] An embodiment of this utility model also provides a photovoltaic module, including a photovoltaic module backsheet.

[0021] The beneficial effects of the photovoltaic module backsheet and photovoltaic module of this utility model embodiment include, for example:

[0022] The photovoltaic module backsheet includes a backsheet body, which is non-rectangular in shape, comprising a central main portion and an extension portion extending outwards to at least one of the four sides. The extension portion is bendable. A water-blocking layer, identical in shape to the backsheet body, is covered on the backsheet body. An adhesive layer is provided on the extension portion of the water-blocking layer. In use, the backsheet body, being non-rectangular, includes a central main portion and an extension portion extending outwards to at least one of the four sides. The extension portion is bendable. The adhesive layer is provided on the extension portion of the water-blocking layer and is used to bond to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate, thereby wrapping the outer peripheral wall of the photovoltaic module laminate. This allows the outwardly extending portion of the backsheet body to be bonded to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate through the adhesive layer. Furthermore, the water-blocking layer of the same shape on the backsheet body provides a water-blocking seal at the edges of the outer peripheral wall and / or upper surface of the laminate. This improves the overall sealing of the photovoltaic module backsheet, thereby further enhancing its water and vapor resistance.

[0023] The photovoltaic module includes a photovoltaic module backsheet. In use, the backsheet body is non-rectangular, comprising a central main portion and extensions extending outwards at least to one side. These extensions are bendable. An adhesive layer is provided on the extensions of the water-blocking layer. This adhesive layer is used to bond to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate, thus wrapping the outer peripheral wall of the photovoltaic module laminate. This allows the outward extensions of the backsheet body to bond to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate via the adhesive layer. Furthermore, the backsheet body is covered with a water-blocking layer of the same shape, which provides a water-blocking seal to the edges of the outer peripheral wall and / or upper surface of the laminate. This improves the overall sealing performance of the photovoltaic module backsheet, thereby further enhancing its water vapor resistance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a first-view structural schematic diagram of the photovoltaic module backsheet provided in this embodiment;

[0026] Figure 2 This is a structural schematic diagram of the photovoltaic module backsheet from a second perspective provided in this embodiment;

[0027] Figure 3 This is a structural schematic diagram of the photovoltaic module backsheet from a third-view perspective provided in this embodiment.

[0028] Icons: 100-PV module backsheet; 10-Backsheet body; 11-First protective layer; 12-Water-blocking layer; 13-Adhesive layer; 14-Reinforcement layer; 15-Second protective layer; 20-Adhesive layer; 30-First vent. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0035] Example 1

[0036] Photovoltaic modules are devices that convert solar energy into electrical energy. They are mainly composed of glass, backsheets, solar cells, solder ribbons, and frames. The backsheet, the outer layer material on the back of the photovoltaic module, is a crucial component. It isolates the module from the external environment, providing electrical insulation that allows the module to operate outdoors for extended periods. The reliability and lifespan of the module are closely related to the quality of the backsheet. If the backsheet material fails, the encapsulation materials inside the module will be directly exposed to the harsh outdoor environment, leading to hydrolysis of the encapsulation materials, corrosion of the cells and solder ribbons, and delamination. This rapidly reduces the module's power output and lifespan, and in severe cases, can cause insulation failure, potentially resulting in fires and injuries.

[0037] The backsheet of photovoltaic modules in related technologies has a technical problem of insufficient sealing, resulting in insufficient water vapor resistance.

[0038] Please refer to Figures 1-3 This embodiment provides a photovoltaic module backsheet 100 and a photovoltaic module, which can effectively improve the technical problems mentioned above, improve the overall sealing performance of the photovoltaic module backsheet 100, and thus further improve the waterproof and vapor-proof capabilities.

[0039] In this embodiment, the photovoltaic module includes solar cells, photovoltaic glass, a junction box, an upper encapsulating film, a lower encapsulating film, a frame, a junction box, solder ribbons, and a photovoltaic module backplate 100. The photovoltaic module backplate 100 is bonded to the back of the solar cells and wraps around them via the lower encapsulating film. The photovoltaic glass is bonded to the front of the solar cells via the upper encapsulating film. The photovoltaic glass is typically made of high-transmittance tempered glass to protect the solar cells and ensure efficient light transmission. The junction box is mounted on the photovoltaic module backplate 100 and is used for current output and electrical connection. Solder ribbons are used for electrical connection between the solar cells, collecting and transmitting current to the junction box. The frame, the photovoltaic module backplate 100, and the glass cover form a tight connection, creating an effective sealing structure that prevents moisture and dust from entering the interior of the photovoltaic module, avoiding corrosion or short circuits caused by moisture.

[0040] It should be noted that the photovoltaic module backsheet 100 includes a backsheet body 10, which is non-rectangular in shape. The backsheet body 10 includes a main body portion located in the middle and an extension portion extending outward to at least one side. The extension portion is bendable. A water-blocking layer is covered on the backsheet body 10, and the water-blocking layer has the same shape as the backsheet body 10. An adhesive layer 20 is provided on the extension portion of the water-blocking layer. The adhesive layer 20 is used to bond to the outer peripheral wall and / or the edge of the upper surface of the photovoltaic module laminate, so as to wrap the outer peripheral wall and the edge of the upper surface of the photovoltaic module laminate.

[0041] In this embodiment, the back panel body 10 includes a main body portion located in the middle and extension portions extending outwards in all directions. That is, the main body portion has extension portions extending outwards in all directions.

[0042] In this embodiment, the adhesive layer 20 is bonded to both the outer peripheral wall and the edge of the upper surface of the photovoltaic module laminate. The outwardly extending portion of the water-blocking layer 12 is simultaneously wrapped around the outer peripheral wall and the edge of the upper surface of the photovoltaic module laminate via the adhesive layer 20. In other embodiments, the adhesive layer 20 is used to bond to the outer peripheral wall of the photovoltaic module laminate to wrap around it. Specifically, when the adhesive layer 20 is only bonded to the outer peripheral wall of the photovoltaic module laminate, the outwardly extending portion of the water-blocking layer 12 may not be wrapped around the edge of the upper surface of the laminate. The outwardly extending portion of the water-blocking layer 12 wraps around the outer peripheral wall of the photovoltaic module laminate via the adhesive layer 20 to seal it, thereby reducing the path for moisture to enter the laminate and improving the module's water-blocking capability. Alternatively, the adhesive layer 20 is used to bond to the edge of the upper surface of the photovoltaic module laminate to wrap around both the outer peripheral wall and the edge of the upper surface of the photovoltaic module laminate. After the water-blocking layer 12 extends outward and is bonded to the upper surface edge of the photovoltaic module laminate via the adhesive layer 20, the outward-extending part of the water-blocking layer 12 will also wrap around the outer peripheral wall of the photovoltaic module laminate to seal it, thereby reducing the path of water vapor entering the laminate and improving the module's water vapor resistance.

[0043] It should be noted that, in this embodiment, the outer peripheral wall refers to the annular closed structure formed by the outer edge of the laminate. The topmost part of the laminate is photovoltaic glass, and the upper surface of the laminate is the upper surface of the photovoltaic glass. The adhesive layer can be bonded to the edge of the upper surface of the photovoltaic glass. Specifically, the edge of the upper surface of the laminate is the annular closed structure formed by the side edges of the upper surface of the photovoltaic glass.

[0044] In this embodiment, the photovoltaic module backsheet 100 includes a first protective layer 11, a water-blocking layer 12, an adhesive layer 13, a reinforcing layer 14, and a second protective layer 15, stacked sequentially from top to bottom. The main body of the backsheet 10 and its outwardly extending portions are covered with the water-blocking layer 12, the adhesive layer 13, and the reinforcing layer 14. The outwardly extending portions of the water-blocking layer 12, the adhesive layer 13, and the reinforcing layer 14 can be folded to seal the outer peripheral wall and the edge of the upper surface of the laminate. Compared to existing photovoltaic module backsheets 100, the photovoltaic module backsheet 100 provided in this embodiment can further extend outward from the backsheet body 10 to seal the outer peripheral wall and the edge of the upper surface of the laminate, thereby reducing the path for moisture to enter the laminate and improving the module's water vapor resistance.

[0045] In other embodiments, the main body of the back panel 10 and the outwardly extending portion to one side may also be covered with a second protective layer 15. Alternatively, in more embodiments, the main body of the back panel 10 and the outwardly extending portion to one side may only have a water-blocking layer 12. No specific limitation is made here.

[0046] Specifically, the water-blocking layer 12 can be made of metals or alloys such as aluminum. The reinforcing layer 14 can be made of PET (polyethylene terephthalate). The adhesive layer 13 can be made of adhesive. The first protective layer 11 and the second protective layer 15 can be made of fluorinated materials or PET (polyethylene terephthalate).

[0047] Specifically, the thickness of the first protective layer 11 is 10μm-20μm. In this embodiment, the thickness of the first protective layer 11 is 10μm. In other embodiments, the thickness of the first protective layer 11 may also be 12μm, 15μm or 20μm, and no specific limitation is made here.

[0048] Specifically, the thickness of the water-blocking layer 12 is 10μm-40μm. In this embodiment, the thickness of the water-blocking layer 12 is 10μm. In other embodiments, the thickness of the water-blocking layer 12 can also be 16μm, 20μm, 30μm or 40μm, and no specific limitation is made here.

[0049] Specifically, the thickness of the adhesive layer 13 is 6μm-10μm. In this embodiment, the thickness of the adhesive layer 13 is 6μm. In other embodiments, the thickness of the adhesive layer 13 may also be 7μm, 8μm, or 10μm, and no specific limitation is made here.

[0050] Specifically, the thickness of the reinforcing layer 14 is 280 μm-350 μm. In this embodiment, the thickness of the reinforcing layer 14 is 280 μm. In other embodiments, the thickness of the reinforcing layer 14 may also be 300 μm, 320 μm, or 350 μm, and no specific limitation is made here.

[0051] Specifically, the thickness of the second protective layer 15 is 6μm-10μm. In this embodiment, the thickness of the second protective layer 15 is 6μm. In other embodiments, the thickness of the second protective layer 15 is 7μm, 8μm, or 10μm, and no specific limitation is made here.

[0052] It should also be noted that during the lamination and assembly of the photovoltaic module backsheet 100, problems such as insufficient vacuum in the laminator or uneven bonding of photovoltaic module materials can easily lead to air bubbles forming in the internal adhesive film of the photovoltaic module backsheet 100, thus affecting the quality and performance of the photovoltaic module backsheet 100 and ultimately impacting the overall structure of the photovoltaic module. To solve this technical problem, in the photovoltaic module backsheet 100 provided in this embodiment, the outwardly extending portion of the backsheet body 10 is provided with a first vent hole 30. The first vent hole 30 provides an venting channel during the lamination of the backsheet body 10, allowing air bubbles inside the backsheet body 10 to escape, thereby preventing air bubbles from forming inside the photovoltaic module backsheet 100 and ensuring the quality and performance of the photovoltaic module backsheet 100.

[0053] Furthermore, the back panel body 10 has a first vent 30 in the outward extension portion extending to at least one side. Alternatively, each outward extension portion of the back panel body 10 may have a first vent 30, without specific limitation.

[0054] In this embodiment, there are multiple first vent holes 30, and the multiple first vent holes 30 are arranged at intervals along the length direction of the water-blocking layer 12.

[0055] In this embodiment, the main body of the backsheet 10 and its outwardly extending portions are both covered with a water-blocking layer 12, and each extension portion has at least one first vent hole 30. The extension portions can be folded relative to the main body, so that after the main body and the solar cells are bonded together, the extension portions of the backsheet 10 and the water-blocking layer covering them can be folded to the outer peripheral wall and upper surface edge of the laminate for sealing, further improving the water-blocking capability of the photovoltaic module. Each outwardly extending portion of the backsheet 10 has three first drainage holes, which are equidistantly spaced.

[0056] In other embodiments, each extension portion of the backplate body 10 that expands outward in all directions may be provided with two or four first drainage holes, without specific limitation. However, it is worth noting that the number of first drainage holes should not be too large, so as to avoid affecting the sealing performance of the backplate body 10 due to an excessive number of first drainage holes.

[0057] It should be noted that the shape of the first exhaust hole 30 can be circular or square, etc. In this embodiment, the first exhaust hole 30 is a circular hole structure, and the diameter of the first exhaust hole 30 is 1mm-4mm.

[0058] In this embodiment, the diameter of the first exhaust hole 30 is 1 mm. In other embodiments, the diameter of the first exhaust hole 30 may also be 2 mm, 3 mm or 4 mm, and no specific limitation is made here.

[0059] Furthermore, since the first vent hole 30 formed on the back panel body 10 by the drilling process will affect the structural strength of the back panel body 10, water-blocking tape or water-blocking adhesive is added to the surface of the first vent hole 30 during the subsequent edge sealing process, thereby reinforcing the position on the back panel body 10 where the first vent hole 30 is formed.

[0060] More specifically, the adhesive layer 20 is disposed on the side of the water-blocking layer 12 away from the backsheet body 10. The distance between the edge of the adhesive layer 20 away from the water-blocking layer 12 and the edge of the glass cover is 1mm-3mm, thereby preventing excessive film overflow from hindering the sealing of the photovoltaic module by the outward extension of the water-blocking layer 12. Specifically, the distance between the edge of the adhesive layer 20 away from the water-blocking layer 12 and the edge of the glass cover is 1mm. In other embodiments, the distance between the edge of the adhesive layer 20 away from the water-blocking layer 12 and the edge of the glass cover can also be 1.5mm, 2mm, or 3mm, and is not specifically limited here.

[0061] Furthermore, the adhesive layer 20 can be made of a material with initial tack.

[0062] Furthermore, the photovoltaic module backsheet 100 is an integrated structure. Specifically, the integrated structure of the photovoltaic module backsheet 100 reduces the number of module manufacturing steps, thereby lowering costs.

[0063] Furthermore, the back panel body 10 has a chamfer between two adjacent extensions, so that when the extensions are folded relative to the body, they can better fit against the outer peripheral wall of the laminate, thereby achieving a water-blocking seal.

[0064] Furthermore, the chamfer between two adjacent extensions on the back panel body 10 can reduce the thickness of the crease at the fold position of the outward extension of the water-blocking layer 12 relative to the main body, so as to reduce the gap between the frame and the photovoltaic module back panel 100 during subsequent framing, and further ensure the good sealing of the photovoltaic module.

[0065] The photovoltaic module backsheet 100 and photovoltaic module provided in this embodiment have at least the following advantages:

[0066] In the prior art, during the lamination assembly process of the photovoltaic module backsheet 100, problems such as insufficient vacuum in the laminator or uneven bonding of photovoltaic module materials can easily lead to air bubbles forming in the internal adhesive film of the photovoltaic module backsheet 100, thus affecting the quality and performance of the photovoltaic module backsheet 100 and ultimately impacting the overall structure of the photovoltaic module. To solve this technical problem, the photovoltaic module backsheet 100 provided in this embodiment has a first vent hole 30 in the outwardly extending portion of the backsheet body 10. The first vent hole 30 provides an venting channel during the lamination of the backsheet body 10, allowing air bubbles inside the backsheet body 100 to escape, thereby preventing air bubbles from forming inside the photovoltaic module backsheet 100 and ensuring the quality and performance of the photovoltaic module backsheet 100.

[0067] In summary, this utility model embodiment provides a photovoltaic module backsheet 100 and a photovoltaic module.

[0068] The photovoltaic module backsheet includes a backsheet body 10, which is non-rectangular in shape and includes a main body portion located in the middle and an extension portion extending outward to at least one side. The extension portion is bendable. A water-blocking layer 12 is covered on the backsheet body 10, and the water-blocking layer 12 has the same shape as the backsheet body 10. An adhesive layer 20 is provided on the extension portion of the water-blocking layer 12. In use, the backsheet body 10 is non-rectangular, comprising a central main portion and an extension portion extending outwards at least to one side. This extension portion is bendable. An adhesive layer 20 is provided on the extension portion of the water-blocking layer 12. The adhesive layer 20 is used to bond to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate, thus wrapping the outer peripheral wall of the photovoltaic module laminate. This allows the outward extension portion of the backsheet body 10 to be bonded to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate via the adhesive layer 20. Furthermore, the backsheet body 10 is covered with a water-blocking layer 12 of the same shape, which provides a water-blocking seal to the edges of the outer peripheral wall and / or upper surface of the laminate. This improves the overall sealing performance of the photovoltaic module backsheet, thereby further enhancing its water vapor resistance.

[0069] The photovoltaic module includes a photovoltaic module backsheet. In use, the backsheet body 10 is non-rectangular, comprising a central main portion and an extension portion extending outwards to at least one side. The extension portion is bendable. An adhesive layer 20 is provided on the extension portion of the water-blocking layer 12. The adhesive layer 20 is used to bond to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate, thus wrapping the outer peripheral wall of the photovoltaic module laminate. This allows the outward extension portion of the backsheet body 10 to be bonded to the outer peripheral wall and / or the upper surface edge of the photovoltaic module laminate through the adhesive layer 20. Furthermore, the backsheet body 10 is covered with a water-blocking layer 12 of the same shape, which can provide a water-blocking seal at the edges of the outer peripheral wall and / or the upper surface of the laminate. This improves the overall sealing performance of the photovoltaic module backsheet, thereby further enhancing its water vapor resistance.

[0070] Example 2

[0071] This embodiment provides a photovoltaic module backsheet, which includes a backsheet body 10. The backsheet body 10 is non-rectangular in shape and includes a main body portion located in the middle and an extension portion extending outward to at least one side. The extension portion is bendable. A water-blocking layer 12 is covered on the backsheet body 10. The water-blocking layer 12 has the same shape as the backsheet body 10. An adhesive layer 20 is provided on the extension portion of the water-blocking layer 12.

[0072] In this embodiment, the back panel body 10 includes a main body portion located in the middle and extension portions extending outward to opposite sides.

[0073] It is worth noting that all structures not mentioned in this embodiment are the same as those in Embodiment 1.

[0074] Example 3

[0075] This embodiment provides a photovoltaic module backsheet, which includes a backsheet body 10. The backsheet body 10 is non-rectangular in shape and includes a main body portion located in the middle and an extension portion extending outward to at least one side. The extension portion is bendable. A water-blocking layer 12 is covered on the backsheet body 10. The water-blocking layer 12 has the same shape as the backsheet body 10. An adhesive layer 20 is provided on the extension portion of the water-blocking layer 12.

[0076] In this embodiment, the back panel body 10 includes a main body portion located in the middle and an extension portion extending outward to one side.

[0077] It is worth noting that all structures not mentioned in this embodiment are the same as those in Embodiment 1.

[0078] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A photovoltaic module backsheet, characterized in that, include: The back panel body (10) is non-rectangular in shape, including a main body part located in the middle and an extension part that extends outward to at least one side of the periphery, the extension part being bendable; The back panel body (10) is covered with a water-blocking layer (12), and the water-blocking layer (12) and the back panel body (10) have the same shape; An adhesive layer (20) is provided on the extended portion of the water-blocking layer (12).

2. The photovoltaic module backsheet according to claim 1, characterized in that, The main body of the backplate (10) and its outward extensions to opposite sides are both covered with the water-blocking layer (12); or, The main body of the back panel (10) and its outward extensions are both covered with the water-blocking layer (12).

3. The photovoltaic module backsheet according to claim 1, characterized in that, The photovoltaic module backsheet also includes a first protective layer (11), an adhesive layer (13), a reinforcing layer (14), and a second protective layer (15), wherein the first protective layer (11), the water-blocking layer (12), the adhesive layer (13), the reinforcing layer (14), and the second protective layer (15) are stacked sequentially.

4. The photovoltaic module backsheet according to claim 3, characterized in that, The main body portion of the back panel body (10) and the extended portion extending outwards at least to one side are both covered with the adhesive layer (13) and the reinforcing layer (14); or, The main body portion of the back panel body (10) and the extension portion extending outward to at least one side are covered with the adhesive layer (13), the reinforcing layer (14), and the second protective layer (15).

5. The photovoltaic module backsheet according to claim 1, characterized in that, The back panel body (10) has a first vent (30) extending outward in all directions.

6. The photovoltaic module backsheet according to claim 1, characterized in that, The back panel body (10) has a first vent (30) extending outward in at least one direction.

7. The photovoltaic module backsheet according to claim 5 or 6, characterized in that, There are multiple first exhaust holes (30), and the multiple first exhaust holes (30) are arranged sequentially at intervals along the length direction of the back plate body (10).

8. The photovoltaic module backsheet according to claim 1, characterized in that, The backplate body (10) has a chamfer between two adjacent extensions.

9. The photovoltaic module backsheet according to claim 1, characterized in that, The thickness of the water-blocking layer (12) is 10μm-40μm.

10. A photovoltaic module, characterized in that, Includes the photovoltaic module backsheet (100) as described in any one of claims 1-9.

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