Photovoltaic laminate and photovoltaic module

Abstract

The utility model discloses a photovoltaic laminated member and a photovoltaic assembly. The photovoltaic laminated member comprises a photovoltaic cell layer, a first cover plate, a second cover plate and a sealing assembly. The photovoltaic cell layer is arranged between the first cover plate and the second cover plate, a groove is formed in the outer peripheral edge of at least one of the first cover plate and the second cover plate, the groove extends in the circumferential direction of the first cover plate and the second cover plate, and the photovoltaic cell layer is located on the inner peripheral side of the groove; and the sealing assembly is arranged in the groove. The groove is formed in the outer periphery of at least one of the first cover plate and the second cover plate, and the sealing assembly is arranged in the groove, so that displacement of the photovoltaic cell layer relative to the first cover plate and the second cover plate can be avoided, the sealing performance of the photovoltaic laminated piece is improved, overflow of the adhesive film layer arranged between the two cover plates is avoided, the edge thickness of the photovoltaic laminated piece is improved, and the service life of the photovoltaic laminated piece is prolonged. Therefore, the structural strength of the outer periphery of the photovoltaic laminated piece is higher, the reliability of the photovoltaic laminated piece is effectively improved, and the service life of the photovoltaic laminated piece is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of solar photovoltaic component packaging, in particular to a photovoltaic laminate and a photovoltaic component. Background Art

[0002] In the prior art, the sealing performance of photovoltaic modules is low, and the adhesive film of photovoltaic laminates will overflow after lamination, resulting in film loss, reduced module edge thickness, and reduced module reliability. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, one purpose of the present invention is to provide a photovoltaic laminate that can improve the reliability of the photovoltaic laminate.

[0004] The second object of the present invention is to provide a photovoltaic assembly, comprising a frame and the photovoltaic laminate described in any one of the embodiments of the first aspect.

[0005] According to the photovoltaic laminate of the embodiment of the present invention, the photovoltaic laminate includes: a photovoltaic cell layer, a first cover plate, a second cover plate and a sealing assembly, the photovoltaic cell layer is arranged between the first cover plate and the second cover plate, and a groove is formed on the outer peripheral edge of at least one of the first cover plate and the second cover plate, and the groove extends along the circumference of the first cover plate and the second cover plate, and the photovoltaic cell layer is located on the inner peripheral side of the groove; the sealing assembly is arranged in the groove.

[0006] According to the photovoltaic laminate of the embodiment of the present invention, a groove is formed on the outer periphery of at least one of the first cover plate and the second cover plate, and the groove extends along the circumference of the first cover plate and the second cover plate. The sealing component is arranged in the groove, which can avoid the photovoltaic cell layer from shifting relative to the first cover plate and the second cover plate, and improve the sealing of the photovoltaic laminate, avoid overflow of the film layer arranged between the two cover plates, and increase the edge thickness of the photovoltaic laminate, so that the structural strength of the outer periphery of the photovoltaic laminate is higher, effectively improving the reliability of the photovoltaic laminate and extending the service life of the photovoltaic laminate.

[0007] In some embodiments, the groove is formed on a side of the first cover plate adjacent to the second cover plate; and / or the groove is formed on a side of the second cover plate adjacent to the first cover plate.

[0008] In some embodiments, the sealing assembly includes: a sealing member and an adhesive member, and the adhesive member is provided on the outer peripheral side of the sealing member.

[0009] In some embodiments, the sealing member is an elastic member.

[0010] In some embodiments, the diameter of the seal is D, and D satisfies: 0.5 mm ≤ D ≤ 4 mm.

[0011] In some embodiments, the adhesive member is an EVA film layer, a POE film layer, or an EPE film layer.

[0012] In some embodiments, the groove has a depth of H, and H satisfies: 0<H<2mm.

[0013] In some embodiments, a distance between the groove and corresponding side edges of the first cover plate and / or the second cover plate is L, and L satisfies: 0<L≤0.5mm.

[0014] In some embodiments, the groove is polygonal, circular, or elliptical in shape.

[0015] According to the photovoltaic assembly of the second embodiment of the present invention, the photovoltaic assembly includes: a frame and a photovoltaic laminate, the photovoltaic laminate cooperates with the frame, and the photovoltaic laminate is the photovoltaic laminate described in any one of the embodiments of the first aspect.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a photovoltaic laminate according to an embodiment of the first aspect of the present utility model;

[0019] Figure 2 yes Figure 1 Schematic diagram of the enlarged P region.

[0020] Reference numerals:

[0021] 100. Photovoltaic laminates;

[0022] 10. Photovoltaic cell layer;

[0023] 20. First cover plate;

[0024] 30. Second cover plate; 31. Groove;

[0025] 40. Sealing assembly;

[0026] 50. Adhesive film layer. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 2 A photovoltaic laminate 100 according to an embodiment of the present invention is described. The photovoltaic laminate 100 includes a photovoltaic cell layer 10 , a first cover plate 20 , a second cover plate 30 and a sealing assembly 40 .

[0028] Specifically, if Figure 1 and Figure 2 As shown, the photovoltaic cell layer 10 is arranged between the first cover plate 20 and the second cover plate 30, and a groove 31 is formed on the outer periphery of at least one of the first cover plate 20 and the second cover plate 30. The groove 31 extends along the circumference of the first cover plate 20 and the second cover plate 30, and the photovoltaic cell layer 10 is located on the inner peripheral side of the groove 31; the sealing assembly 40 is arranged in the groove 31.

[0029] That is, the first cover plate 20, the second cover plate 30, and the photovoltaic cell layer 10 are aligned along the thickness direction of the photovoltaic laminate 100, and the photovoltaic cell layer 10 is located between the first cover plate 20 and the second cover plate 30. The groove 31 extends along the circumference of the first cover plate 20. The groove 31 is suitable for cooperating with the sealing assembly 40, and the outer periphery of the photovoltaic cell layer 10 is spaced apart from the inner periphery of the groove 31. At least one of the first cover plate 20 and the second cover plate 30 is formed with the groove 31. When the sealing assembly 40 is disposed in the groove 31, it can seal the gap defined by the first cover plate 20 and the second cover plate 30 along the circumference. A film layer 50, such as an EVA (Polyethylenevinylacetate, polyethylene-polyvinyl acetate copolymer) film layer 50, is further provided between the photovoltaic cell layer 10 and the first cover plate 20 and the second cover plate 30. After the first cover plate 20, the second cover plate 30, the photovoltaic cell layer 10 and the film layer 50 are laminated, the film layer 50 extends between the first cover plate 20 and the second cover plate 30 to achieve uniform distribution.

[0030] In this embodiment, a groove 31 is formed on the outer periphery of each of the first cover plate 20 and the second cover plate 30 .

[0031] According to the photovoltaic laminate 100 of the embodiment of the present invention, a groove 31 is formed on the outer periphery of at least one of the first cover plate 20 and the second cover plate 30, and the groove 31 extends along the circumference of the first cover plate 20 and the second cover plate 30. The sealing component 40 is arranged in the groove 31, which can prevent the photovoltaic cell layer 10 from shifting relative to the first cover plate 20 and the second cover plate 30, and improve the sealing performance of the photovoltaic laminate 100, avoid overflow of the film layer 50 arranged between the two cover plates, and increase the edge thickness of the photovoltaic laminate 100, so that the structural strength of the outer periphery of the photovoltaic laminate 100 is higher, effectively improving the reliability of the photovoltaic laminate 100 and extending the service life of the photovoltaic laminate 100.

[0032] According to some embodiments of the present invention, Figure 2 As shown, the groove 31 is formed on a side of the first cover plate 20 adjacent to the second cover plate 30; or, the groove 31 is formed on a side of the second cover plate 30 adjacent to the first cover plate 20; or the groove 31 is formed on a side of the first cover plate 20 adjacent to the second cover plate 30, and the groove 31 is formed on a side of the second cover plate 30 adjacent to the first cover plate 20.

[0033] For example, at the outer peripheral edge of the first cover plate 20 on the side adjacent to the second cover plate 30, a groove 31 is recessed along the thickness direction of the photovoltaic laminate 100 toward a direction away from the second cover plate 30, and the groove 31 extends along the circumference of the first cover plate 20; optionally, at the outer peripheral edge of the second cover plate 30 on the side adjacent to the first cover plate 20, a groove 31 is recessed along the thickness direction of the photovoltaic laminate 100 toward a direction away from the first cover plate 20, and the groove 31 extends along the circumference of the second cover plate 30.

[0034] Thus, the groove 31 is formed on the side of the first cover plate 20 adjacent to the second cover plate 30; or, the groove 31 is formed on the side of the second cover plate 30 adjacent to the first cover plate 20; or the groove 31 is formed on the side of the first cover plate 20 adjacent to the second cover plate 30, and at the same time, the groove 31 is formed on the side of the second cover plate 30 adjacent to the first cover plate 20, which can facilitate the sealing assembly 40 to be arranged on the outer periphery of the first cover plate 20 and the second cover plate 30, avoiding displacement of the sealing assembly 40, effectively improving the structural strength of the first cover plate 20 and the second cover plate 30, and can improve the overall structural strength of the photovoltaic laminate 100 and improve the reliability of the photovoltaic laminate 100.

[0035] According to some embodiments of the present invention, the sealing assembly 40 includes: a sealing member and an adhesive member, and the adhesive member is provided on the outer peripheral side of the sealing member.

[0036] In this embodiment, the sealing member cooperates with the groove 31 of the first cover plate 20 and the groove 31 of the second cover plate 30 respectively, and the sealing member is suitable for sealing the edge of the photovoltaic laminate 100; the adhesive member is provided on the outer peripheral side of the sealing member, and the adhesive member is suitable for bonding the sealing member to the groove 31 of the first cover plate 20 and the groove 31 of the second cover plate 30 respectively.

[0037] Therefore, the adhesive is arranged on the outer peripheral side of the sealing member. When the first cover plate 20, the photovoltaic cell layer 10 and the second cover plate 30 are laminated, the sealing assembly 40 is arranged in the groove 31 of the first cover plate 20 and the second cover plate 30. The sealing member can seal the outer peripheral edge of the photovoltaic laminate 100, and the adhesive can bond the outer peripheral edges of the first cover plate 20 and the second cover plate 30, thereby improving the connection strength of the first cover plate 20 and the second cover plate 30 and improving the sealing of the photovoltaic laminate 100.

[0038] According to some embodiments of the present invention, the sealing element is an elastic element.

[0039] That is, when the first cover plate 20, photovoltaic cell layer 10, and second cover plate 30 are laminated, the seal provided at the groove 31 of the first and second cover plates 20, 30 is subjected to pressure and partially extends toward both sides of the groove 31, thereby increasing the contact area between the seal and the groove 31 of the first and second cover plates 20, 30. Thus, the seal is an elastic member, which can further improve the sealing performance of the photovoltaic laminate 100, while further increasing the connection strength between the first and second cover plates 20, 30, and further improving the reliability and stability of the photovoltaic laminate 100.

[0040] According to some embodiments of the present invention, the diameter of the sealing member is D, and D satisfies: 0.5 mm ≤ D ≤ 4 mm.

[0041] If the diameter of the seal is less than 0.5 mm, the seal is too small and may not fully fit into the groove 31 of the first and second cover plates 20 and 30, resulting in the seal being unable to be fixed in the groove 31 of the first and second cover plates 20 and 30, and the sealing performance of the photovoltaic laminate 100 is poor. If the diameter of the seal is greater than 4 mm, the seal is too large and may not fit into the groove 31 of the first and second cover plates 20 and 30, thereby increasing production costs. For example, D = 1 mm.

[0042] Thus, by limiting the diameter range of the seal, a tight fit between the seal and the groove 31 of the first cover plate 20 and the second cover plate 30 can be achieved, thereby improving the connection strength between the first cover plate 20 and the second cover plate 30, preventing the photovoltaic cell layer 10 from being scratched out from the gap between the seal and the groove 31, improving the sealing and reliability of the photovoltaic laminate 100, and at the same time, reducing production costs.

[0043] According to some embodiments of the present invention, the adhesive member is an EVA film layer, a POE film layer or an EPE film layer.

[0044] The adhesive can be an EVA film layer, also known as Polyethylene Vinyl Acetate (PEVA); a POE film layer, also known as Poly(ethylene-1-octene) (ethylene-octene); or an EPE film layer, also known as co-extruded POE film. This is a new type of photovoltaic film manufactured by co-extruding POE and EVA resins. EVA, POE, or EPE films all offer high flexibility, a smooth surface, uniform thickness, high hot melt fluidity, and high-temperature resistance.

[0045] Therefore, the adhesive is an EVA film layer, a POE film layer or an EPE film layer, so that when the first cover plate 20, the photovoltaic cell layer 10 and the second cover plate 30 are laminated, the adhesive can extend to the left and right sides, effectively improving the sealing and stability of the photovoltaic laminate 100, and at the same time making the thickness of the outer periphery of the photovoltaic laminate 100 uniform, avoiding the thickness of the corners of the photovoltaic laminate 100 being too thin, eliminating the corner guard process, simplifying the processing flow, improving the structural strength of the photovoltaic laminate 100, and improving the reliability of the photovoltaic laminate 100.

[0046] According to some embodiments of the present invention, the groove 31 has a depth H, and H satisfies: 0<H<2mm.

[0047] When the groove 31 has a depth greater than 2 mm, the groove 31 is too deep, which may cause the outer peripheries of the first and second cover plates 20 and 30 to be too thin, thereby reducing the structural strength of the outer peripheries of the first and second cover plates 20 and 30. For example, H = 1 mm.

[0048] Therefore, limiting the depth range of the groove 31 can prevent the outer periphery thickness of the first cover plate 20 and the second cover plate 30 from being too thin, thereby improving the structural strength of the outer periphery of the first cover plate 20 and the second cover plate 30 and improving the overall structural strength and reliability of the photovoltaic laminate 100.

[0049] In this embodiment, the diameter of the sealing member is greater than the sum of the depths of the grooves 31 on the first cover plate 20 and the second cover plate 30 .

[0050] According to some embodiments of the present invention, the distance between the groove 31 and the corresponding side edge of the first cover plate 20 is L, or the distance between the groove 31 and the corresponding side edge of the second cover plate 30 is L, or the distance between the groove 31 and the corresponding side edge of the first cover plate 20 is L, and at the same time, the distance between the groove 31 and the corresponding side edge of the second cover plate 30 is L, and L satisfies: 0<L≤0.5mm.

[0051] In this embodiment, the distance between the groove 31 and the corresponding side edge of the first cover plate 20 is L, and the distance between the groove 31 and the corresponding side edge of the second cover plate 30 is L. When the distance between the corresponding side edges of the first cover plate 20 and the distance between the groove 31 and the corresponding side edge of the second cover plate 30 is greater than 0.5 mm, the distance between the corresponding side edges of the first cover plate 20 and the distance between the groove 31 and the corresponding side edge of the second cover plate 30 are too large, which may result in the distance between the groove 31 and the photovoltaic cell layer 10 being too small, and the sealing component of the sealing assembly 40 may be squeezed against the photovoltaic cell layer 10, and the adhesive component of the sealing assembly 40 may be bonded to the photovoltaic cell layer 10. For example, L = 0.2 mm.

[0052] Therefore, by limiting the range of the distance between the corresponding side edges of the first cover plate 20 and the distance between the groove 31 and the corresponding side edges of the second cover plate 30, it is possible to avoid extrusion between the seal and the photovoltaic cell layer 10, avoid adhesion between the adhesive and the photovoltaic cell layer 10 affecting the effect of the photovoltaic cell layer 10, and improve the space utilization of the photovoltaic laminate 100.

[0053] According to some embodiments of the present invention, the shape of the groove 31 is polygonal, circular or elliptical.

[0054] That is, the shape of the groove 31 can be set according to different requirements of the photovoltaic laminate 100. The polygonal shape of the groove 31 can increase the connection strength between the groove 31 and the sealing component 40, and avoid relative sliding between the sealing component 40 and the groove 31; optionally, the shape of the groove 31 can also be circular or elliptical, which reduces the processing accuracy of the sealing component 40, improves the processing efficiency of the sealing component 40, and at the same time, improves the assembly efficiency of the sealing component 40 and the groove 31.

[0055] According to the photovoltaic assembly of the second embodiment of the present invention, the photovoltaic assembly includes: a frame and a photovoltaic laminate 100, the photovoltaic laminate 100 cooperates with the frame, and the photovoltaic laminate 100 is any one of the photovoltaic laminates 100 of the first embodiment.

[0056] In this embodiment, after the first cover plate 20, the photovoltaic cell layer 10, the second cover plate 30 and the sealing assembly 40 are laminated, the flow of the melted film layer 50 is slowed down to prevent the film layer 50 from overflowing the outer periphery of the photovoltaic laminate 100. There is no need to chamfer the outer periphery of the photovoltaic laminate 100, and the frame can be matched with the outer periphery of the photovoltaic laminate 100, thereby effectively improving the processing efficiency and reliability of the photovoltaic module.

[0057] In this embodiment, the second cover plate 30 is first placed on the working surface, and a groove 31 is formed on the outer periphery of the second cover plate 30, the sealing assembly 40 is placed in the groove 31, and then the film layer 50, the photovoltaic cell layer 10, the film layer 50 and the first cover plate 20 are placed in sequence, wherein the outer periphery of the first cover plate 20 forms a groove 31, and the groove 31 is respectively arranged on the side of the first cover plate 20 and the second cover plate 30 adjacent to each other, and then the first cover plate 20, the film layer 50, the photovoltaic cell layer 10, the film layer 50, the second cover plate 30 and the sealing assembly 40 are laminated to form a photovoltaic laminate 100, so that the photovoltaic laminate 100 is matched with the frame to finally form a photovoltaic assembly.

[0058] In the description of the present invention, 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 to 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 invention 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 to the present invention.

[0059] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. In the description of the present invention, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0060] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0061] Although the embodiments of the present invention 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 purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A photovoltaic laminate, characterized in that include: Photovoltaic cell layer; a first cover plate and a second cover plate, wherein the photovoltaic cell layer is disposed between the first cover plate and the second cover plate, a groove is formed on an outer periphery of at least one of the first cover plate and the second cover plate, the groove extending along the circumference of the first cover plate and the second cover plate, and the photovoltaic cell layer is located on an inner periphery of the groove; A sealing component is arranged in the groove.

2. The photovoltaic laminate according to claim 1, wherein The groove is formed on a side of the first cover plate adjacent to the second cover plate; and / or, The groove is formed on a side of the second cover plate adjacent to the first cover plate.

3. The photovoltaic laminate according to claim 1, wherein The sealing assembly comprises: seals; An adhesive member is provided on the outer peripheral side of the sealing member.

4. The photovoltaic laminate according to claim 3, characterized in that The sealing member is an elastic member.

5. The photovoltaic laminate according to claim 3, wherein The diameter of the sealing member is D, and D satisfies: 0.5 mm ≤ D ≤ 4 mm.

6. The photovoltaic laminate according to claim 3, characterized in that The adhesive member is an EVA film layer, a POE film layer or an EPE film layer.

7. The photovoltaic laminate according to claim 1, wherein The groove depth is H, and H satisfies: 0<H<2mm.

8. The photovoltaic laminate according to claim 1, wherein A distance between the groove and corresponding side edges of the first cover plate and / or the second cover plate is L, and L satisfies: 0<L≤0.5mm.

9. The photovoltaic laminate according to any one of claims 1 to 8, characterized in that The shape of the groove is polygonal, circular or elliptical.

10. A photovoltaic module, characterized in that: include: frame; A photovoltaic laminate, wherein the photovoltaic laminate cooperates with the frame, and the photovoltaic laminate is the photovoltaic laminate according to any one of claims 1 to 9.

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