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High-cut-off solar energy packaging film

A solar energy encapsulation and cut-off technology, which is applied in the field of solar cells, can solve the problems of unsatisfactory photoelectric conversion efficiency, etc., and achieve the effect of superior transmittance of visible light, superior barrier of ultraviolet light, and improvement of cut-off light rate

Inactive Publication Date: 2019-03-19
CHANGZHOU HEWEI NEW MATERIAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photoelectric conversion efficiency of existing solar cell modules is not ideal, and because the existing encapsulation film has poor functions of blocking ultraviolet rays and reflecting sunlight, in order to prevent the rapid aging of the backplane, the EVA film of the lower layer needs to cut off 290-380nm Ultraviolet light, and has a better ability to reflect sunlight, so that it can bring higher power generation efficiency and longer service life to photovoltaic modules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0037] Embodiment 2 is a preferred implementation.

[0038] The preparation method and effect of a high cut-off type solar energy encapsulation adhesive film in this technical solution are as follows:

[0039] Firstly, after the raw materials and various additives required for production are accurately measured according to the above-mentioned plan, they are fully mixed to make the required raw materials meet the production requirements, and then put into the extrusion system through the hopper. Then, through the pressure and shear force generated by the single screw rotation of the extruder, the polymer is fully plasticized and homogenized by using the shear force between the material and the barrel, the screw and the heat introduced from the outside of the barrel. and extruded from the extruder; at the same time, the melt is filtered through the filter installed between the head of the extruder and the die to remove impurities in the molten polymer. Next, the raw material e...

Embodiment 1-3

[0041]According to the method of Example 1, a high cut-off type solar energy encapsulation adhesive film is prepared, the difference is that the mass fractions of each component are different, and the performance parameters of various aspects are also different. See Table 2 for the various performance parameter values ​​of the high cut-off type solar energy encapsulation film.

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Abstract

The invention provides a high-cut-off solar energy packaging film. The high-cut-off solar energy packaging film comprises, based on mass, EVA (ethylene-vinyl acetate copolymer) resin, peroxide, an assistant crosslinker, a silane coupling agent, an anti-oxidative aging agent, a light stabilizer and an ultraviolet absorber. The high-cut-off solar energy packaging film is fixed between a solar energybattery piece and a backplate and is excellent in visible light transmission and ultraviolet light blocking property, so that a solar energy component is enabled to be higher in photoelectric conversion efficiency and is adhered to glass more firmly. The high-cut-off solar energy packaging film has the advantages that not only an optical property of an EVA film can be improved, light cut-off efficiency is improved, working efficiency of a battery is improved, anti-aging and anti-yellowing properties of the EVA film are improved, service life of the solar battery is prolonged, packaging shrinkage rate can be improved, the battery piece is protected from displacement, breaking and electrode damage in a packaging crosslinking process due to small shrinkage rate, and quick and efficient packaging can be realized.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a high cut-off type solar energy encapsulation adhesive film. Background technique [0002] Solar energy is an excellent choice to replace the increasingly depleted petroleum energy. In recent years, crystalline silicon solar cells have received great attention and development. The main body of a typical crystalline silicon solar cell module is a laminate of multi-layer materials. The structure of the laminate is a layer of glass, a layer of encapsulation film, and a layer of solar cells from top to bottom. , a layer of packaging film and a layer of backplane. In the current commercial crystalline silicon solar modules, the encapsulation film mainly uses ethylene-vinyl acetate copolymer (hereinafter referred to as EVA) material, and the functions of the upper and lower layers of encapsulation film are different. The photoelectric conversion efficiency of existing solar c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/06C09J7/30C09J7/10H01L31/048
CPCH01L31/0481C09J7/10C09J7/30C09J11/06C09J123/0853C08K2201/014C09J2203/322C08K5/00Y02E10/50
Inventor 丁盛张炳李进薛海华张海鹏
Owner CHANGZHOU HEWEI NEW MATERIAL TECH CO LTD