CN222852564U

CN222852564U - A fully black flexible photovoltaic module

Info

Publication number: CN222852564U
Application number: CN202420835269.0U
Authority: CN
Inventors: 谢申衡; 姜成银; 桂林林; 蒋盼盼
Original assignee: Daheng Energy Co ltd
Current assignee: Daheng Energy Co ltd
Priority date: 2024-04-22
Filing date: 2024-04-22
Publication date: 2025-05-09
Anticipated expiration: 2034-04-22

Abstract

The utility model discloses an all-black flexible photovoltaic module, which belongs to the field of photovoltaic technology. 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 adopts 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.

Description

Full black flexible photovoltaic module

Technical Field

The utility model relates to the technical field of photovoltaics, in particular to a full black flexible photovoltaic module.

Background

The photovoltaic module has a simple structure, and is mainly made of glass, upper and lower EVA adhesive layers, a battery piece, a back plate and other materials, and the materials are laminated into a whole, so that the photovoltaic module has heavy weight.

At present, a transparent front plate and a white back plate of a PET (polyethylene terephthalate) substrate are used for forming a component structure of the flexible solar photovoltaic component, the permeability of the PET substrate is high, and the reliability of the flexible component is insufficient.

When the sunlight irradiates on the surface of the component, a part of energy is converted into electric energy by the silicon cell, and the other part of energy is converted into heat energy, so that heat is accumulated in the component, the heat is mainly conducted to the backboard through heat conduction during heat dissipation, and finally the heat is dissipated to the surrounding environment through air. Because the contact area of the back plate and the surrounding air is smaller, the heat conduction performance of the common back plate is common, and the heat dissipation performance of the assembly is extremely poor. Second, the power of the silicon cell decreases with increasing temperature, and the increase in temperature and the decrease in power substantially change linearly, so that the improvement of the heat dissipation performance of the component can be used to reduce the decrease in efficiency of the component. There is currently a lack of flexible photovoltaic modules with high heat dissipation properties.

Disclosure of utility model

The utility model provides a full black flexible photovoltaic module, which solves the problem of insufficient heat dissipation performance of the conventional flexible photovoltaic module.

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

The full black flexible photovoltaic module 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 surface to the back surface, wherein the heat dissipation layer is a graphene film.

Further, the transparent front plate is of a three-layer structure and comprises a PET layer of a middle layer and fluorine-containing coatings respectively positioned on two sides of the middle layer.

Further, the packaging layer is of a three-layer structure and comprises an ethylene-octene copolymer layer of an intermediate layer material and ethylene-vinyl acetate copolymer layers respectively positioned on two sides of the intermediate layer.

Further, the second encapsulation layer is an ethylene-vinyl acetate copolymer layer.

Further, the transparent front plate has a thickness of 300-350 μm.

Further, the thickness of the packaging layer is 0.4-0.6mm.

Further, the thickness of the heat dissipation layer is 10-100 μm.

Further, all layers of the photovoltaic module are assembled into a whole in an adhesive or hot melting mode.

Further, bus bars are arranged on the battery pieces.

Compared with the prior art, the photovoltaic module has the following beneficial effects that the photovoltaic module sequentially comprises the transparent front plate, the packaging layer, the battery piece, the second packaging layer, the heat dissipation layer and the back plate from front to back, wherein 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 backboard are packaged to form a frame-free photovoltaic module, so that the weight of the photovoltaic module is reduced, and meanwhile, the reliability of the module is improved. The graphene film has good stability, acid resistance, alkali resistance and corrosion resistance, and improves the reliability of the flexible photovoltaic module.

Drawings

FIG. 1 is a schematic view of a flexible assembly;

Fig. 2 is a schematic diagram of a heat dissipation layer film structure.

Description of the reference numerals:

1. Transparent front plate, 2, packaging layer, 3, battery piece, 31, bus bar, 4, second packaging layer, 5, heat dissipation layer, 6, backplate.

Detailed Description

The present utility model will be described in detail below with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present utility model, and other ways of implementing the utility model will occur to those skilled in the art on the basis of the preferred embodiment, and are within the scope of the utility model.

As shown in fig. 1 and 2, the present embodiment provides a fully black flexible photovoltaic module, which includes, in order from front to back, a transparent front plate 1, an encapsulation layer 2, a battery sheet 3, a second encapsulation layer 4, a heat dissipation layer 5, and a back plate 6. The heat dissipation layer 5 is a graphene film, and the specific heat dissipation layer 5 is a full-black graphene film, so that the heat conduction rate can be increased, the heat dissipation performance of the component is improved, and the temperature of the component is effectively and rapidly reduced. Meanwhile, the graphene film is adopted as the heat dissipation layer 5, so that the photovoltaic module has good stability, is acid-resistant, alkali-resistant and corrosion-resistant, and improves the reliability of the photovoltaic module.

In this embodiment, the transparent front plate 1 has a three-layer structure including a PET layer of the intermediate layer and fluorine-containing coatings respectively located on both sides of the intermediate layer, and the transparent front plate 1 has a thickness of 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 high light transmittance and water vapor resistance.

Further, the packaging layer 2 has a three-layer structure, and comprises an ethylene-octene copolymer layer of an intermediate layer material and ethylene-vinyl acetate copolymer layers respectively positioned at two sides of the intermediate layer. The second encapsulation layer 4 is an ethylene-vinyl acetate copolymer layer. The encapsulation layer 2 has a thickness of 0.4-0.6mm, preferably 0.5mm. In this embodiment, the encapsulation layer 2 has high transparency and excellent durability.

The thickness of the heat dissipation layer 5 is 10-100 μm, and the thickness of the heat dissipation layer 5 in this embodiment is 55 μm. The heat dissipation layer 5 is positioned between the second packaging layer 4 and the backboard 6, has higher heat conductivity, improves heat dissipation performance, and meanwhile, the graphene film has excellent chemical stability, acid resistance, alkali resistance and corrosion resistance, and greatly improves the reliability of the flexible component.

In the embodiment, all layers of the photovoltaic module are assembled into a whole in an adhesive or hot melting mode, and the whole is packaged into a frameless light module, so that the reliability of the module is improved.

As a further improvement, the bus bar 31 is arranged on the battery piece 3, and Mxene substance is added in the material of the bus bar 31, so that the bus bar 31 is black, easy to identify, and the conductivity of the bus bar 31 is increased.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The scope of protection of the utility model is limited only by the claims. Those skilled in the art, having the benefit of the teachings of this utility model, will readily recognize alternative constructions to the disclosed structure as viable alternative embodiments, and the disclosed embodiments may be combined to create new embodiments that fall within the scope of the appended claims.

Claims

1. An all-black flexible photovoltaic module, characterized in that: from the front to the back, it comprises, in sequence, a transparent front plate (1), an encapsulation layer (2), a battery cell (3), a second encapsulation 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) is a three-layer structure, including a PET layer as a middle layer and fluorine-containing coatings located on both sides of the middle layer.

3. The all-black flexible photovoltaic module according to claim 1, characterized in that 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 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 encapsulation 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 cell sheet (3).