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EVA film for solar cell packaging and preparation method of EVA film

A technology of solar cells and adhesive films, applied in circuits, adhesives, electrical components, etc., can solve the problems of reduced power generation and low volume resistivity of photovoltaic modules, and achieve optimized anti-PID ability, high volume resistivity, and good dispersion Effect

Active Publication Date: 2015-04-29
浙江兆泽实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For photovoltaic modules produced with polycrystalline silicon cells, if the quality of the polycrystalline silicon cells is good, the existing EVA film can also meet the PID test requirements. If the polycrystalline silicon cells are of poor quality, the existing EVA film cannot meet the PID test requirements. Requirements, after the PID test, the power generation power of the photovoltaic module is greatly reduced, which greatly exceeds the limit of 5%.
Looking at the existing domestic EVA film, the volume resistivity is relatively low

Method used

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  • EVA film for solar cell packaging and preparation method of EVA film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The EVA glue film that is used for solar cell encapsulation of the present embodiment is configured according to the following mass percentages:

[0039] Ethylene-vinyl acetate-based copolymer 80%, tert-butyl peroxybenzoate 1%, glycidoxypropyltrimethoxysilane 0.5%, tris(nonylphenyl)phosphite 0.05%, tert-butyl 0.5% of 2-ethylhexyl carbonate peroxide, 1% of hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, and the balance is propanol;

[0040] The massfraction of vinyl acetate in described ethylene-vinyl acetate-based copolymer is 29.4%;

[0041] Described tert-butyl peroxybenzoate is a crosslinking curing agent;

[0042] The glycidoxypropyltrimethoxysilane is a silane coupling agent;

[0043] The three (nonylphenyl) phosphites are antioxidants;

[0044] The tert-butyl peroxy 2-ethylhexyl carbonate is a crosslinking curing agent;

[0045] The 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester is an ultraviolet absorber.

[0046] The preparation method of the EVA adhe...

Embodiment 2

[0053] The remainder of the EVA adhesive film that is used for solar cell encapsulation of the present embodiment is identical with embodiment 1, and difference is:

[0054] Present embodiment is used for the EVA adhesive film of solar cell encapsulation, is made up of following components:

[0055] Ethylene-vinyl acetate based copolymer 90%, tert-butyl peroxybenzoate 2%, glycidoxypropyltrimethoxysilane 1%, tris(nonylphenyl) phosphite 2%, tert-butyl 1% of 2-ethylhexyl carbonate peroxide, 3% of hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, and the balance is isopropanol;

[0056] The massfraction of vinyl acetate in described ethylene-vinyl acetate-based copolymer is 29.7%;

Embodiment 3

[0058] The remainder of the EVA adhesive film that is used for solar cell encapsulation of the present embodiment is identical with embodiment 1, and difference is:

[0059] Present embodiment is used for the EVA adhesive film of solar cell encapsulation, is made up of following components:

[0060] Ethylene-vinyl acetate-based copolymer 89%, tert-butyl peroxybenzoate 1.8%, glycidoxypropyltrimethoxysilane 0.9%, tris(nonylphenyl)phosphite 2%, tert-butyl 1% of 2-ethylhexyl peroxyl carbonate, 2% of hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, and the balance is isopropanol;

[0061] The massfraction of vinyl acetate in described ethylene-vinyl acetate-based copolymer is 29.5%;

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Abstract

The invention relates to an EVA film for solar cell packaging and a preparation method of the EVA film. The EVA film consists of the following components by mass: 80 to 90% of ethylene-vinyl acetate copolymer, 1 to 2% of tert-Butyl peroxybenzoate, 0.5 to 1% of epoxy propoxy propyl trimethoxy silane, 0.05 to 2% of trisnonylphenylphosphite, 0.5 to 1% of tert-butylperoxy 2-ethylhexyl carbonate, 1 to 3% of hexadecyl 3,5-di-tert-butyl-4-hydroxy-benzoate and the balance of an organic solvent. The EVA film for the solar cell packaging has the advantages of high volume resistivity, high transmittance and low yellowing rate, and meanwhile improves the photoelectric conversion rate of a battery pack, and the preparation method of the EVA film for the solar cell packaging is simple in technology, convenient to operate, good in dispersibility, good in adhesiveness and high in stability.

Description

technical field [0001] The invention relates to an EVA adhesive film used for solar cell packaging and a preparation method thereof, belonging to the technical field of organic chemistry. Background technique [0002] In the context of global warming, deterioration of the human ecological environment, and shortage of conventional energy sources, sustainable development strategies have been accepted by countries all over the world. Solar energy has the advantages of cleanliness, safety, and resource adequacy. It is one of the most important new energy sources in the 21st century and has been valued and supported by governments of all countries. In recent years, the photovoltaic market has expanded rapidly, and photovoltaic products are in short supply. [0003] With the continuous development of photovoltaic module technology and some problems found in the use, that is, the module is under the action of high voltage for a long time, which causes leakage current between the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06H01L31/048B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/405B29C48/875B29C48/92B29C2948/92704B29C2948/92895
Inventor 顾正忠陈忠斌
Owner 浙江兆泽实业有限公司