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EVA thin film for solar cell packaging and preparation method thereof

A solar cell and thin film technology, applied in thin film/sheet adhesives, circuits, photovoltaic power generation, etc., can solve the problems of reduced power generation power and low volume resistivity of photovoltaic modules, and achieve optimized anti-PID ability, high volume Good resistivity and adhesion

Active Publication Date: 2015-05-06
ZHEJIANG KELI NEW MATERIAL TECH CO LTD
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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 thin film for solar cell packaging and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The EVA film 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%, 2-(3,4-epoxycyclohexyl) ethyltrimethylsilane 0.5%, tris(nonylphenyl) Phosphate ester 0.05%, tert-butyl peroxy 2-ethylhexyl carbonate 0.5%, 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester 1%, 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 2-(3,4-epoxycyclohexyl)ethyltrimethylsilane 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 metho...

Embodiment 2

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

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

[0060] Ethylene-vinyl acetate-based copolymer 90%, tert-butyl peroxybenzoate 2%, 2-(3,4-epoxycyclohexyl)ethyltrimethylsilane 1%, tris(nonylphenyl) Phosphate ester 2%, tert-butyl peroxy 2-ethylhexyl carbonate 1%, 3,5-di-tert-butyl-4-hydroxybenzoic acid cetyl ester 3%, the balance is isopropanol;

[0061] The massfraction of vinyl acetate in described ethylene-vinyl acetate-based copolymer is 29.7%;

Embodiment 3

[0063] The remainder of the EVA film that is used for solar cell encapsulation of the present embodiment is identical with embodiment 1, and difference is:

[0064] The present embodiment is used for the EVA film of solar cell encapsulation, is made up of following components:

[0065] Ethylene-vinyl acetate-based copolymer 89%, tert-butyl peroxybenzoate 1.8%, 2-(3,4-epoxycyclohexyl) ethyltrimethylsilane 0.9%, tris(nonylphenyl) Phosphate ester 2%, tert-butyl peroxy 2-ethylhexyl carbonate 1%, cetyl 3,5-di-tert-butyl-4-hydroxybenzoate 2%, the balance is isopropanol;

[0066] 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 thin film for solar cell packaging and a preparation method thereof. The EVA thin film comprises the following components by weight: 80-90% of an ethylene vinyl-acetate copolymer, 1-2% of tert-butyl peroxybenzoate, 0.5-1% of 2-(3,4-epoxy cyclohexyl) ethyl trimethyl silane, 0.05-2% of tris (nonyl phenyl) phosphite, 0.5-1% of tert-butyl peroxy 2-ethylhexyl carbonate, 1-3% of 3,5-ditert butyl-4-hydroxy benzoic acid cetyl ester and the balance of an organic solvent. The EVA thin film for solar cell packaging has high volume resistivity, high transmittance and low yellowing rate and can improve the photoelectric conversion rate of the battery pack. The preparation method of the EVA thin film has simple process and convenient operations, and the EVA thin film for solar cell packaging has good adhesion, binding property and high stability.

Description

technical field [0001] The invention relates to an EVA 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 glass and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06H01L31/048B29B9/06
CPCY02E10/50
Inventor 顾正忠陈忠斌
Owner ZHEJIANG KELI NEW MATERIAL TECH CO LTD