All-black flexible photovoltaic module

Abstract

The utility model discloses an all-black flexible photovoltaic assembly, and belongs to the field of photovoltaic technology. The photovoltaic assembly sequentially comprises a transparent front plate, a packaging layer, a battery piece, a second packaging layer, a heat dissipation layer and a back plate from the front side to the back side, and the heat dissipation layer is a graphene film. The transparent front plate, the packaging layer, the battery piece, the second packaging layer, the heat dissipation layer and the back plate are packaged together to form the frameless photovoltaic module, the weight of the photovoltaic module is reduced, and meanwhile the reliability of the module is improved. The heat dissipation layer adopts the graphene film, so that the heat conduction rate can be increased, and the temperature of the photovoltaic module is effectively reduced; the graphene film has good stability, acid resistance, alkali resistance and corrosion resistance, and the reliability of the flexible photovoltaic module is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and more specifically to a full-black flexible photovoltaic component. Background Art

[0002] The structure of photovoltaic modules is simple, mainly including glass, upper and lower EVA adhesive layers, battery cells, back panels and other materials. The materials are laminated into a whole, so photovoltaic modules are heavy.

[0003] Currently, flexible solar photovoltaic modules use a transparent front panel and a white back panel made of PET substrate to form a module structure. The water permeability of the PET substrate is relatively high, and the reliability of the flexible modules is insufficient.

[0004] When sunlight shines on the surface of the module, the silicon cell converts part of the energy into electrical energy, and the other part of the energy is converted into heat energy, causing heat to accumulate inside the module. When dissipating heat, the heat is mainly transferred to the backplane through heat conduction, and finally dissipated to the surrounding environment through air convection. Due to the small contact area between the backplane and the surrounding air, and the general thermal conductivity of the ordinary backplane, the heat dissipation performance of the module is extremely poor. Secondly, the power of the silicon cell will decrease with the increase of temperature, and the increase in temperature and the decrease in power basically show a linear change. Therefore, the heat dissipation performance of the module can be improved to reduce the decrease in module efficiency. At present, there is a lack of flexible photovoltaic modules with high heat dissipation performance. Utility Model Content

[0005] The utility model provides a full-black flexible photovoltaic component, which solves the problem of insufficient heat dissipation performance of the existing flexible photovoltaic components.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0007] A fully black flexible photovoltaic module comprises, from the front to the back, a transparent front plate, a packaging layer, a battery sheet, a second packaging layer, a heat dissipation layer and a back plate; the heat dissipation layer is a graphene film.

[0008] Furthermore, the transparent front plate is a three-layer structure, including a PET layer as a middle layer and fluorine-containing coatings respectively located on both sides of the middle layer.

[0009] Furthermore, the encapsulation layer is a three-layer structure, including an ethylene-octene copolymer layer of an intermediate layer material and ethylene-vinyl acetate copolymer layers respectively located on both sides of the intermediate layer.

[0010] Furthermore, the second encapsulation layer is an ethylene-vinyl acetate copolymer layer.

[0011] Furthermore, the thickness of the transparent front plate is 300-350 μm.

[0012] Furthermore, the packaging layer has a thickness of 0.4-0.6 mm.

[0013] Furthermore, the heat dissipation layer has a thickness of 10-100 μm.

[0014] Furthermore, the layers of the photovoltaic module are assembled into a whole by gluing or hot melting.

[0015] Furthermore, a bus bar is arranged on the battery cell.

[0016] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: the photovoltaic module of the utility model includes a transparent front plate, a packaging layer, a battery cell, a second packaging layer, a heat dissipation layer and a back plate from the front to the back, and the heat dissipation layer is a graphene film. The transparent front plate, the packaging layer, the battery cell, the second packaging layer, the heat dissipation layer and the back plate packaging together form a frameless photovoltaic module, which reduces the weight of the photovoltaic module and improves the reliability of the module. The heat dissipation layer uses a graphene film, which can increase the rate of heat conduction, thereby effectively reducing the temperature of the photovoltaic module; the graphene film has good stability, acid, alkali and corrosion resistance, and improves the reliability of the flexible photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the flexible component structure;

[0018] Figure 2 Schematic diagram of the heat dissipation layer film structure.

[0019] Description of labels:

[0020] 1. Transparent front panel; 2. Packaging layer; 3. Battery cell; 31. Bus bar; 4. Second packaging layer; 5. Heat dissipation layer; 6. Back panel. DETAILED DESCRIPTION

[0021] The present invention will be described in detail with reference to the accompanying drawings. What is described here is only a preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and other ways also fall within the scope of the present invention.

[0022] like Figure 1 and Figure 2As shown, this embodiment provides an all-black flexible photovoltaic module, which includes a transparent front plate 1, an encapsulation layer 2, a cell 3, a second encapsulation layer 4, a heat dissipation layer 5 and a back plate 6 from the front to the back. The heat dissipation layer 5 is a graphene film, and specifically the heat dissipation layer 5 is an all-black graphene film, which can increase the rate of heat conduction and improve the heat dissipation performance of the module, thereby effectively and quickly reducing the module temperature. At the same time, the heat dissipation layer 5 uses a graphene film, which has good stability, and is acid-resistant, alkali-resistant, and corrosion-resistant, thereby improving the reliability of the photovoltaic module.

[0023] In this embodiment, the transparent front plate 1 is a three-layer structure, including a PET layer in the middle layer and fluorine-containing coatings located on both sides of the middle layer, and the thickness of the transparent front plate 1 is 300-350 μm. In this embodiment, the thickness of the transparent front plate 1 is preferably 325 μm, so that the transparent front plate 1 has a higher light transmittance and water vapor resistance.

[0024] Further, the encapsulation layer 2 is a three-layer structure, including an ethylene-octene copolymer layer of an intermediate layer material and ethylene-vinyl acetate copolymer layers respectively located on both sides of the intermediate layer. The second encapsulation layer 4 is an ethylene-vinyl acetate copolymer layer. The thickness of the encapsulation layer 2 is 0.4-0.6 mm, preferably 0.5 mm. In this embodiment, the encapsulation layer 2 has high transparency and excellent durability.

[0025] The thickness of the heat dissipation layer 5 is 10-100 μm, and in this embodiment, the thickness of the heat dissipation layer 5 is 55 μm. The heat dissipation layer 5 is located between the second packaging layer 4 and the back plate 6, has a high thermal conductivity, and improves the heat dissipation performance; at the same time, the graphene film has excellent chemical stability, acid and alkali resistance, and corrosion resistance, which greatly improves the reliability of the flexible component.

[0026] In this embodiment, the layers of the photovoltaic module are assembled into a whole by gluing or hot melting, and packaged into a frameless lightweight module to improve the reliability of the module.

[0027] As a further improvement, a bus bar 31 is provided on the battery cell 3 , and Mxene is added to the material of the bus bar 31 , so that the bus bar 31 is black and easy to identify, while increasing the conductivity of the bus bar 31 .

[0028] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inside" and "outside" are based on the orientations or positional relationships shown in the 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 cannot be understood as a limitation on the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The protection scope of the present invention is limited only by the claims. Thanks to the teachings of the present invention, those skilled in the art will easily recognize that alternative structures to the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. An all-black flexible photovoltaic module, characterized in that: It comprises, from the front to the back, a transparent front plate (1), a packaging layer (2), a battery cell (3), a second packaging layer (4), a heat dissipation layer (5) and a back plate (6); The second encapsulation layer (4) is an ethylene-vinyl acetate copolymer layer; The heat dissipation layer (5) is located between the second encapsulation layer (4) and the back plate (6), and the layers of the photovoltaic module are assembled into a whole by gluing or hot melting; The heat dissipation layer (5) is a graphene film, and the heat dissipation layer (5) is a full black graphene film, and the thickness of the heat dissipation layer (5) is 10-100 μm.

2. The all-black flexible photovoltaic module according to claim 1, characterized in that: The transparent front plate (1) has a three-layer structure, comprising a PET layer as an intermediate layer and fluorine-containing coatings located on both sides of the intermediate layer.

3. The all-black flexible photovoltaic module according to claim 1, characterized in that: The encapsulation layer (2) is a three-layer structure, comprising an ethylene-octene copolymer layer of an intermediate layer material and ethylene-vinyl acetate copolymer layers respectively located on both sides of the intermediate layer.

4. The all-black flexible photovoltaic module according to claim 2, characterized in that: The thickness of the transparent front plate (1) is 300-350 μm.

5. The all-black flexible photovoltaic module according to claim 3, characterized in that: The packaging layer (2) has a thickness of 0.4-0.6 mm.

6. The all-black flexible photovoltaic module according to claim 1, characterized in that: A bus bar (31) is provided on the battery sheet (3).

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