Photovoltaic tile and photovoltaic module

Abstract

The utility model discloses a photovoltaic tile and a photovoltaic assembly. The photovoltaic tile comprises a laminated assembly and a back plate, the laminated assembly comprises a front plate, a battery piece, a flexible layer and a buffer layer which are stacked in sequence, and the flexible layer is a fiber layer; the back plate is a metal plate, and the back plate is arranged on the surface of the side, away from the flexible layer, of the buffer layer. According to the photovoltaic tile provided by the embodiment of the invention, the back plate can provide relatively strong structural support, and meanwhile, the laminated assembly is formed by overlapping the front plate, the battery piece, the flexible layer and the buffer layer, and the flexible layer is a bendable fiber layer, so that the impact resistance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic technology field more specifically, relate to a kind of photovoltaic tile and photovoltaic module. BACKGROUND

[0002] Photovoltaic tile is the equipment that solar energy is converted into electric energy, and the cell piece in photovoltaic tile can absorb light and convert light energy into electric energy. The front plate and back plate are provided on the same side of the cell piece, to provide structural support and protect the cell piece. However, under extreme conditions such as hail weather, the front plate and back plate with relatively large rigidity are insufficient to resist impact objects such as hail, which can easily cause damage to the photovoltaic tile. SUMMARY

[0003] The utility model embodiment provides a kind of photovoltaic tile and photovoltaic module.

[0004] The photovoltaic tile of the present application embodiment includes a laminated assembly and a back plate. The laminated assembly comprises a front plate, a cell piece, a flexible layer and a buffer layer stacked in order. The flexible layer is a fiber layer. The back plate is a metal plate, and the back plate is arranged on the side surface of the buffer layer away from the flexible layer.

[0005] In the photovoltaic tile of the present application embodiment, the back plate can provide strong structural support. Meanwhile, the laminated assembly is stacked by the front plate, the cell piece, the flexible layer and the buffer layer. The flexible layer is a bendable fiber layer, thereby improving the impact resistance.

[0006] In some embodiments, the front plate and the buffer layer are both plastic plates, and the front plate has light-transmitting property.

[0007] In this way, it is beneficial to reduce the weight of the laminated assembly and can provide a certain strength of structural support. In addition, the front plate and the buffer layer are both plastic plates, which is also beneficial to insulate and protect the cell piece.

[0008] In some embodiments, the thickness of the front plate ranges from 0.41 to 0.75 mm.

[0009] In this way, the front plate with relatively thick thickness is used, thereby improving the structural strength and impact resistance of the photovoltaic tile.

[0010] In some embodiments, the thickness of the buffer layer ranges from 0.2 to 0.35 mm.

[0011] In this way, the thickness of the buffer layer is set within a reasonable range, which provides sufficient structural support while reducing the weight.

[0012] In some embodiments, the flexible layer is a glass fiber cloth.

[0013] Therefore, the flexible layer made of glass fiber cloth is beneficial to realize lightweight and high impact resistance.

[0014] In some embodiments, the front plate, the flexible layer and the buffer layer all cover the outer contour of the battery sheet in the projection range on the battery sheet in the thickness direction.

[0015] Therefore, the front plate, the flexible layer and the buffer layer can completely cover the two side surfaces of the battery sheet, so that the functions of impact resistance, insulation protection and structural support are fully realized.

[0016] In some embodiments, the laminated assembly comprises a first adhesive film layer and a second adhesive film layer, the first adhesive film layer has light transmittance, the first adhesive film layer is arranged between the front plate and the battery sheet, and the second adhesive film layer is arranged between the battery sheet and the flexible layer.

[0017] Therefore, the front plate and the battery sheet are bonded by the first adhesive film layer, and the battery sheet and the flexible layer are bonded by the second adhesive film layer, so that the structural stability is improved, and the impact resistance is enhanced.

[0018] In some embodiments, the projection range of the first adhesive film layer and the second adhesive film layer on the battery sheet in the thickness direction coincides with the outer contour of the battery sheet.

[0019] Therefore, the first adhesive film layer and the second adhesive film layer completely cover the two side surfaces of the battery sheet in the thickness direction, so that the entire surface of the battery sheet is bonded, and the bonding stability is improved.

[0020] In some embodiments, at least one side edge of the back plate exceeds the projection range of the laminated assembly on the back plate in the thickness direction.

[0021] Therefore, the edge of the back plate has a reserved space, so that the photovoltaic tiles can be overlapped with adjacent photovoltaic tiles during installation.

[0022] The photovoltaic assembly of the embodiments of the present application comprises a plurality of the above-mentioned photovoltaic tiles, and the plurality of photovoltaic tiles are electrically connected.

[0023] The additional aspects and advantages of the present application will be partially given in the following description, some will become apparent from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 is a three-dimensional schematic view of the photovoltaic tile of the embodiments of the present application;

[0026] Figure 2 is a decomposition structure schematic view of the photovoltaic tile of the embodiment of the present application.

[0027] Explanation of reference signs:

[0028] 100-photovoltaic tile; 110-laminated assembly; 10-cell piece; 12-light receiving surface; 13-backlight surface; 20-front plate; 30-flexible layer; 40-buffer layer; 51-first adhesive film layer; 52-second adhesive film layer; 120-back plate. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below with reference to the drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are for the purpose of explaining the present application and should not be understood as limiting the present application.

[0030] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include the first and second features in direct contact, or the first and second features not in direct contact but in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0031] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of a specific example are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0032] In the related art, the photovoltaic tile is usually a laminated structure, and a hard or relatively rigid plate member is provided on both sides of the cell piece to provide structural support. The photovoltaic tile is usually used in outdoor open-air environment, however, the plate member and the cell piece in the photovoltaic tile are laminated, and the impact resistance performance under extreme weather such as hail is insufficient.

[0033] Please refer to Figure 1 and Figure 2 The photovoltaic tile 100 of the embodiment of the present application comprises a laminated assembly 110 and a back plate 120, the laminated assembly 110 comprises a front plate 20, a cell 10, a flexible layer 30 and a buffer layer 40 which are sequentially stacked, the flexible layer 30 is a fiber layer; the back plate 120 is a metal plate, the back plate 120 is arranged on the side surface of the buffer layer 40 away from the flexible layer 30.

[0034] In the photovoltaic tile 100 of the embodiment of the present application, the back plate 120 can provide strong structural support, at the same time, the laminated assembly 110 is stacked by the front plate 20, the cell 10, the flexible layer 30 and the buffer layer 40, the flexible layer 30 is a bendable fiber layer, thereby improving the impact resistance.

[0035] Specifically, the photovoltaic tile 100 can be applied to building surfaces or outdoor flat ground, for example, the photovoltaic tile 100 can be laid on the roof, wall or public facilities such as street lamps, for example, the photovoltaic tile 100 can also be laid in a large area to build a photovoltaic power generation base.

[0036] The photovoltaic tile 100 is in the form of a flat plate, each layer structure in the laminated assembly 110 can be a flat plate, sheet or film, and the back plate 120 is a flat plate. The thickness direction of the laminated assembly 110 is the same as the thickness direction of each layer structure such as the front plate 20, the cell 10, the flexible layer 30 and the buffer layer 40, and can also be consistent with the thickness direction of the photovoltaic tile 100 as a whole. For ease of description, the thickness direction in the embodiment of the present application refers to the thickness direction of the photovoltaic tile 100 as a whole, and also refers to the thickness direction of the front plate 20, the cell 10, the flexible layer 30, the buffer layer 40 and the back plate 120.

[0037] The cell 10 is used to convert light energy into electrical energy. The cell 10 can be a crystalline silicon cell manufactured by using Perc (Passivated Emitter Rear Cell), Topcon (Tunnel Oxide Passivated Contact) or HJT (Heterojunction with Intrinsic Thin-film) technology, or can be a perovskite cell.

[0038] Optionally, the hardness of the flexible layer 30 is lower than the hardness of the front plate 20 and the buffer layer 40, and the hardness of the front plate 20 and the buffer layer 40 is lower than the hardness of the back plate 120.

[0039] Optionally, the back plate 120 is an aluminum or aluminum alloy plate, a color steel plate, an aluminum-zinc plated plate, a zinc plated plate, etc.

[0040] In some embodiments, the front plate 20 and the buffer layer 40 are both plastic plates, and the front plate 20 is transparent. In this way, the weight of the laminated assembly 110 can be reduced, and a certain strength of structural support can be provided. In addition, the front plate 20 and the buffer layer 40 are both plastic plates, which is also beneficial for insulating and protecting the battery sheet 10.

[0041] Specifically, the two sides of the battery sheet 10 in the thickness direction are the light-receiving surface 12 and the back light surface 13, respectively, the front plate 20 covers the light-receiving surface 12 and can at least transmit visible light. The flexible layer 30 and the buffer layer 40 are sequentially stacked on the light-receiving surface 12 of the battery sheet 10.

[0042] Optionally, the front plate 20 can be a plastic plate with good light transmission. Compared with a glass front plate 20, the use of a plastic plate for the front plate 20 can reduce the weight and improve the impact resistance. For example, the front plate 20 can be a colorless and transparent PET (polyethylene terephthalate) plate. Optionally, the buffer layer 40 is a lightweight plastic plate or a composite material plate.

[0043] In some embodiments, the thickness of the front plate 20 ranges from 0.41 mm to 0.75 mm (inclusive). In this way, a relatively thick front plate 20 is used to improve the structural strength and impact resistance of the photovoltaic tile 100.

[0044] For example, the thickness of the front plate 20 can be 0.41 mm, 0.44 mm, 0.52 mm, 0.57 mm, 0.63 mm, 0.66 mm, or 0.75 mm. In a preferred embodiment, the front plate 20 is a 0.58 mm PET plate.

[0045] In some embodiments, the thickness of the buffer layer 40 can be the same as the thickness of the front plate 20.

[0046] In some embodiments, the thickness of the buffer layer 40 ranges from 0.2 mm to 0.35 mm. In this way, the thickness of the buffer layer 40 is set within a reasonable range, which provides sufficient structural support while reducing the weight.

[0047] For example, the thickness of the buffer layer 40 can be 0.2 mm, 0.22 mm, 0.24 mm, 0.27 mm, 0.30 mm, 0.33 mm, or 0.35 mm. Optionally, the buffer layer 40 is a PET plate.

[0048] In some embodiments, the flexible layer 30 is a glass fiber cloth. In this way, the use of a glass fiber cloth to make the flexible layer 30 is beneficial for achieving lightweight and at the same time achieving high impact resistance.

[0049] Specifically, the flexible layer 30 can be made of glass fiber as a base material, and be impregnated with a suspension of polytetrafluoroethylene emulsion. The glass fiber cloth has a low density and is flexible, and can be bent. Therefore, the flexible layer 30 is light and thin, and has good impact resistance.

[0050] Referring to Figure 1 and Figure 2 In some embodiments, the front plate 20, the flexible layer 30, and the buffer layer 40 all cover the outer contour of the battery sheet 10 in the projection direction along the thickness direction. In this way, the front plate 20, the flexible layer 30, and the buffer layer 40 can completely cover the two side surfaces of the battery sheet 10, thereby fully achieving the effects of impact resistance, insulation protection, and structural support.

[0051] Specifically, the battery sheet 10 includes a light-receiving surface 12 and a back surface 13 opposite to each other in the thickness direction, the front plate 20 covers the light-receiving surface 12 of the battery sheet 10, the flexible layer 30 covers the back surface 13 of the battery sheet 10, and the buffer layer 40 can also cover the back surface 13 of the battery sheet. It should be noted that the coverage of the front plate 20, the flexible layer 30, and the buffer layer 40 on the surface of the battery sheet 10 refers to complete covering in the projection direction, and does not limit whether the front plate 20, the flexible layer 30, and the buffer layer 40 are in contact with the surface of the battery sheet 10.

[0052] Optionally, the geometric centers of the front plate 20, the flexible layer 30, and the buffer layer 40 in the projection direction along the thickness direction on the battery sheet 10 coincide with the geometric centers of the outer contour of the battery sheet 10, and the front plate 20, the flexible layer 30, and the buffer layer 40 can have the same shape as the battery sheet 10. Further, the sizes of the front plate 20, the flexible layer 30, and the buffer layer 40 are slightly greater than or equal to the sizes of the same side edges of the battery sheet 10, so that the edges of the front plate 20, the flexible layer 30, and the buffer layer 40 are beyond the same side edges of the battery sheet 10 or flush with the edges of the battery sheet 10.

[0053] For example, the outer contour of the battery sheet 10 is square, the front plate 20 and the buffer layer 40 are both square plates, and the flexible layer 30 can be a square thick sheet. The long edges of the front plate 20, the flexible layer 30, and the buffer layer 40 are located on the same side as the long edges of the battery sheet 10, the short edges of the front plate 20, the flexible layer 30, and the buffer layer 40 are located on the same side as the short edges of the battery sheet 10, and the long edge length of the front plate 20, the flexible layer 30, and the buffer layer 40 is greater than the long edge length of the battery sheet 10, and the short edge length of the front plate 20, the flexible layer 30, and the buffer layer 40 is also greater than the short edge length of the battery sheet 10.

[0054] Optionally, the projections of the front plate 20, the flexible layer 30, and the buffer layer 40 on the plane in which the battery sheet 10 is located along the thickness direction coincide with the outer contour of the battery sheet 10, the edges of the front plate 20, the battery sheet 10, the flexible layer 30, and the buffer layer 40 are flush, and the edges of the laminated assembly 110 can form a flat side surface.

[0055] Please refer to Figure 2 In some embodiments, the laminated assembly 110 comprises a first adhesive film layer 51 and a second adhesive film layer 52, the first adhesive film layer 51 is light-transmissive and is arranged between the front plate 20 and the cell sheet 10, and the second adhesive film layer 52 is arranged between the cell sheet 10 and the flexible layer 30. In this way, the front plate 20 and the cell sheet 10 are bonded by the first adhesive film layer 51, and the cell sheet 10 and the flexible layer 30 are bonded by the second adhesive film layer 52, thereby improving the structural stability and facilitating the enhancement of the impact resistance.

[0056] Specifically, the first adhesive film layer 51 and the second adhesive film layer 52 can be thin films made of thermoplastic plastic, for example, the first adhesive film layer 51 and the second adhesive film layer 52 can be EVA (Polyethylene vinyl acetate) adhesive film, PVB (Polyvinyl Butyral) adhesive film or POE (Polyolefin Elastomer) adhesive film, etc. For another example, the first adhesive film layer 51 can be a colorless and transparent POE adhesive film, and the second adhesive film layer 52 can be an EVA adhesive film, thereby improving the waterproof performance of the cell sheet 10 on the light-receiving surface 12.

[0057] Please refer to Figure 2 The projection range of the first adhesive film layer 51 and the second adhesive film layer 52 on the cell sheet 10 along the thickness direction coincides with the outer contour of the cell sheet 10. In this way, the first adhesive film layer 51 and the second adhesive film layer 52 completely cover the two side surfaces of the cell sheet 10 along the thickness direction, thereby fully bonding the entire surface of the cell sheet 10 and improving the bonding stability.

[0058] Specifically, the cell sheet 10 is pressed into a flat plate structure, and the outer contour of the cell sheet 10 can be square, polygonal, triangular, trapezoidal, diamond, sector, circular, elliptical or other irregular shape, which is not limited in the present application. The first adhesive film layer 51 and the second adhesive film layer 52 are in the same shape as the outer contour of the cell sheet 10 and have the same size.

[0059] For example, the cell sheet 10 is a square flat plate, and the first adhesive film layer 51 and the second adhesive film layer 52 are square thin films corresponding to the size of the cell sheet 10.

[0060] Please refer to Figure 2 In some embodiments, at least one side edge of the back plate 120 exceeds the projection range of the laminated assembly 110 on the back plate 120 along the thickness direction. In this way, the edge of the back plate 120 is reserved for space, facilitating the lapping of the photovoltaic tile 100 with adjacent photovoltaic tiles 100 during installation.

[0061] Specifically, the shape of the back plate 120 matches the outline shape of the projection of the laminated assembly 110. For example, the projection of the laminated assembly 110 is square, the back plate 120 can be a square sheet with both the length and the width being larger than the projection outline of the laminated assembly 110, and the long side of the back plate 120 is located at the same side as the long side of the projection outline of the laminated assembly 110, and the short side of the back plate 120 is located at the same side as the short side of the projection outline of the laminated assembly 110. For another example, the projection of the laminated assembly 110 is square, the long side of the back plate 120 is located at the same side as the long side of the projection outline of the laminated assembly 110 and has the same size, and the short side of the back plate 120 is located at the same side as the short side of the projection outline of the laminated assembly 110 and has a length larger than the size of the short side of the projection outline of the laminated assembly 110.

[0062] In some embodiments, the laminated assembly 110 comprises the front plate 20, the first adhesive film layer 51, the battery sheet 10, the second adhesive film layer 52, the flexible layer 30 and the buffer layer 40 which are sequentially stacked and integrally pressed once, wherein the front plate 20 and the buffer layer 40 are PET plates, and the flexible layer 30 is a glass fiber cloth. The laminated assembly 110 is connected with the back plate 120 by secondary pressing or gluing, or the buffer layer 40 and the back plate 120 are punched and fixedly connected by fixing members such as locking screws, to form the integrated photovoltaic tile 100.

[0063] The photovoltaic assembly (not shown in the figure) of the embodiment of the present application comprises a plurality of photovoltaic tiles 100, and the plurality of photovoltaic tiles 100 are electrically connected. In this way, the electrical connection of the plurality of photovoltaic tiles 100 can improve the power generation of the photovoltaic assembly.

[0064] In the description of the embodiments of the present application, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0065] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A photovoltaic tile, characterized in that, The photovoltaic tile comprises: a laminated assembly comprising a front plate, a cell sheet, a flexible layer and a buffer layer stacked in sequence, the flexible layer being a fiber layer; and a back plate, the back plate being a metal plate, the back plate being arranged on a side surface of the buffer layer away from the flexible layer; a projection range of the front plate, the flexible layer and the buffer layer on the cell sheet in a thickness direction covers an outer contour of the cell sheet.

2. Photovoltaic tile according to claim 1, characterized in that, The front plate and the buffer layer are both plastic plates, the front plate having light transmittance.

3. Photovoltaic tile according to claim 2, characterized in that, The front plate has a thickness ranging from 0.41 to 0.75 mm.

4. The photovoltaic tile of claim 2, wherein, The buffer layer has a thickness ranging from 0.2 to 0.35 mm.

5. The photovoltaic tile of claim 1, wherein, The flexible layer is a glass fiber cloth.

6. The photovoltaic tile of claim 1, wherein, The laminated assembly comprises a first adhesive film layer and a second adhesive film layer, the first adhesive film layer having light transmittance, the first adhesive film layer being arranged between the front plate and the cell sheet, the second adhesive film layer being arranged between the cell sheet and the flexible layer.

7. Photovoltaic tile according to claim 6, characterized in that, The projection range of the first adhesive film layer and the second adhesive film layer on the cell sheet in a thickness direction coincides with the outer contour of the cell sheet.

8. The photovoltaic tile of claim 1, wherein, At least one side edge of the back plate exceeds the projection range of the laminated assembly on the back plate in a thickness direction.

9. A photovoltaic module, characterized by A plurality of photovoltaic tiles according to any one of claims 1-8 are electrically connected.

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