CN219123250U

CN219123250U - Lightweight solar cell backboard

Info

Publication number: CN219123250U
Application number: CN202223108595.1U
Authority: CN
Inventors: 魏虎; 周俊
Original assignee: Changshu Tuopu Photovoltaic Material Co ltd
Current assignee: Changshu Tuopu Photovoltaic Material Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-06-02
Anticipated expiration: 2032-11-22

Abstract

The utility model provides a lightweight solar cell backboard, and relates to the technical field of solar cell backboard. The PC substrate comprises a reflective film layer, a first fluorine-containing coating, a PC substrate, a second fluorine-containing coating and a buffer layer. The utility model solves the problems of larger weight, poor shock resistance and easy aging of the existing solar cell backboard by arranging the reflective film layer, the first fluorine-containing coating, the PC substrate, the second fluorine-containing coating and the buffer layer.

Description

Lightweight solar cell backboard

Technical Field

The utility model provides a lightweight solar cell backboard, and relates to the technical field of solar cell backboard.

Background

Solar energy is used as the most important renewable energy source, has the characteristics of inexhaustible use, cleanness, no pollution and the like, and is rapidly developed in recent years. The photovoltaic module generally comprises glass panel, crystalline silicon cell, backplate and EVA etc. however, the whole weight of present photovoltaic module is heavier, because photovoltaic module generally uses double glass structure, because glass is fragile, anti striking ability weak, can sometimes increase glass rigidity in order to promote the anti striking, anti pounding, the resistance to compression of glass panel and backplate, then can make solar panel more heavy, in addition, EVA is ageing after long-term outdoor insolation easily takes place, and EVA can cause yellowing and delamination of backplate to ultraviolet blocking ability decline after ageing, and this is very dangerous. For this purpose, we propose a lightweight solar cell back sheet.

Disclosure of Invention

In order to solve the problems, the utility model provides the lightweight solar cell backboard, which solves the problems of larger weight, poor shock resistance and easy aging of the traditional solar cell backboard through the arrangement of the reflective film layer, the first fluorine-containing coating, the PC substrate, the second fluorine-containing coating and the buffer layer.

The utility model provides a lightweight solar cell backboard, which comprises a reflective film layer, a first fluorine-containing coating, a PC substrate, a second fluorine-containing coating and a buffer layer, wherein the first fluorine-containing coating is arranged on one side of the PC substrate, the second fluorine-containing coating is arranged on the other side of the PC substrate, the reflective film layer is arranged on one side, far away from the PC substrate, of the first fluorine-containing coating, and the buffer layer is arranged on one side, far away from the PC substrate, of the second fluorine-containing coating.

As a preferred embodiment of the present utility model, the first fluorine-containing coating layer and the second fluorine-containing coating layer are fluorine-containing resins, and specifically, the first fluorine-containing coating layer and the second fluorine-containing coating layer may be one or more of PVDF, PTFE, ECTFE and THV fluorine-containing resins.

As a preferable technical scheme of the utility model, the buffer layer is made of a polyester fiber composite material.

As a preferable technical scheme of the utility model, an adhesive layer is arranged among the reflective film layer, the first fluorine-containing coating, the PC substrate, the second fluorine-containing coating and the buffer layer.

As a preferable technical scheme of the utility model, the bonding layer is made of high-weather-resistance high polymer material.

The utility model has the beneficial effects that:

the utility model provides a lightweight solar cell backboard, which can reuse the light reflected by a cell piece through the arrangement of a reflective film layer, is beneficial to improving the output power of the solar cell backboard, can effectively improve the ageing resistance of the backboard through the arrangement of a first fluorine-containing coating and a second fluorine-containing coating, can effectively improve the impact resistance of the backboard through the arrangement of a buffer layer, and can effectively lighten the weight of the backboard through the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame resistance, ageing resistance and the like by replacing a glass substrate with a PC substrate.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a lightweight solar cell back sheet according to the present utility model.

( 1. A reflective film layer; 2. a first fluorine-containing coating; 3. a PC substrate; 4. a second fluorine-containing coating; 5. buffer layer )

Detailed Description

Referring to fig. 1, the utility model provides a lightweight solar cell back sheet, which comprises a reflective film layer 1, a first fluorine-containing coating layer 2, a PC substrate 3, a second fluorine-containing coating layer 4 and a buffer layer 5. Specifically, the reflection film layer 1 can reflect light transmitted through the battery piece to enable the light to be reused, so that the output power of the solar cell panel is improved, the first fluorine-containing coating 2 and the second fluorine-containing coating 4 can effectively improve the ageing resistance of the backboard, the buffer layer 5 can effectively improve the impact resistance of the backboard, the PC substrate 3 replaces a glass substrate, and the PC substrate 3 has the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame resistance, ageing resistance and the like, and the weight of the backboard can be effectively reduced.

Further, in the present utility model, the first fluorine-containing coating layer 2 is disposed on one side of the PC substrate 3, the second fluorine-containing coating layer 4 is disposed on the other side of the PC substrate 3, the reflective film layer 1 is disposed on the side of the first fluorine-containing coating layer 2 away from the PC substrate 3, and the buffer layer 5 is disposed on the side of the second fluorine-containing coating layer 4 away from the PC substrate 3.

Further, the first fluorine-containing coating layer 2 and the second fluorine-containing coating layer 4 in the present utility model may be one or more of PVDF, PTFE, ECTFE and THV fluorine-containing resin. Specifically, the utility model adopts a fluorine-containing coating, and related data prove that the more fluorine atoms contained in the organic compound, the shorter the bond length of the C-F bond, and the larger the bond energy; in addition, as the fluorine atom in the fluorine-containing organic compound increases, the bond length of the corresponding C-C bond is shortened, and the bond energy is also increased, so that the chemical bond in the fluorine-containing organic compound is not easy to break, and the corrosion resistance, chemical resistance and thermal stability are good in macroscopic view; therefore, through the arrangement of the first fluorine-containing coating 2 and the second fluorine-containing coating 4, the back plate can effectively prevent ultraviolet corrosion, so that the solar cell panel is better protected, and the service life of the solar cell panel is ensured.

Further, the buffer layer 5 is a polyester fiber composite material. Specifically, the polyester fiber composite material can keep certain rigidity intensity after solidification, and the solar cell is protected from failure risks such as hidden cracking, fragments and the like of the cell caused by external impact.

Further, in the utility model, an adhesive layer is arranged among the reflective film layer 1, the first fluorine-containing coating 2, the PC substrate 3, the second fluorine-containing coating 4 and the buffer layer 5.

Further, the bonding layer is made of high-weather-resistance high polymer materials. Specifically, the high weather resistance polymer material is used for bonding all material layers and filling the gap between the two layers to form a reliable internal structure, and ethylene-vinyl acetate copolymer (EVA), polyolefin elastomer (POE), polyvinyl butyral (PVB) or 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide (TPO) can be adopted.

Working principle: when the solar cell panel is used, the reflective film layer 1 can reflect light transmitted through the cell sheet to be reused, so that the output power of the solar cell panel is improved, the first fluorine-containing coating 2 and the second fluorine-containing coating 4 can effectively improve the ageing resistance of the backboard, the buffer layer 5 can effectively improve the impact resistance of the backboard, the PC substrate 3 replaces a glass substrate, and the PC substrate 3 has the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame resistance, ageing resistance and the like, and the weight of the backboard can be effectively reduced.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims

1. A lightweight solar cell back sheet, characterized in that: including reflective coating layer (1), first fluorine-containing coating layer (2), PC base plate (3), second fluorine-containing coating layer (4) and buffer layer (5), first fluorine-containing coating layer (2) set up in one side of PC base plate (3), second fluorine-containing coating layer (4) set up in the opposite side of PC base plate (3), reflective coating layer (1) set up in one side that PC base plate (3) was kept away from to first fluorine-containing coating layer (2), buffer layer (5) set up in one side that PC base plate (3) was kept away from to second fluorine-containing coating layer (4).

2. The lightweight solar cell back sheet according to claim 1, wherein: the first fluorine-containing coating (2) and the second fluorine-containing coating (4) are fluorine-containing resins.

3. The lightweight solar cell back sheet according to claim 1, wherein: the buffer layer (5) is made of a polyester fiber composite material.

4. The lightweight solar cell back sheet according to claim 1, wherein: and an adhesive layer is arranged among the reflective film layer (1), the first fluorine-containing coating (2), the PC substrate (3), the second fluorine-containing coating (4) and the buffer layer (5).

5. The lightweight solar cell back sheet according to claim 4, wherein: the bonding layer is made of high-weatherability polymer material.