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EVA film encapsulated in solar battery and preparation method of EVA film

A solar cell and thin film technology, applied in thin film/sheet adhesives, circuits, photovoltaic power generation, etc., can solve the problems of low volume resistivity and reduced power generation power of photovoltaic modules, achieve high volume resistivity, optimize resistance PID capability, the effect of improving the photoelectric conversion rate

Active Publication Date: 2014-04-16
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 film encapsulated in solar battery and preparation method of EVA film

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Experimental program
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Effect test

Embodiment 1

[0038] The EVA film of the 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%, 3-aminopropyltriethoxysilane 0.5%, tris(nonylphenyl)phosphite 0.05%, tert-butyl 0.5% 2-ethylhexyl peroxide, 1% 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 3-aminopropyltriethoxysilane 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 film of the solar cell encapsulation of t...

Embodiment 2

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

[0054] The EVA film of present embodiment solar cell encapsulation is made up of following components:

[0055] Ethylene-vinyl acetate-based copolymer 90%, tert-butyl peroxybenzoate 2%, 3-aminopropyltriethoxysilane 1%, tris(nonylphenyl)phosphite 2%, tert-butyl 1% 2-ethylhexyl peroxide, 3% 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 film of the solar cell encapsulation of the present embodiment is identical with embodiment 1, and difference is:

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

[0060] Ethylene-vinyl acetate based copolymer 89%, tert-butyl peroxybenzoate 1.8%, 3-aminopropyltriethoxysilane 0.9%, tris(nonylphenyl)phosphite 2%, tert-butyl 1% 2-ethylhexyl peroxide, 2% 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 encapsulated in a solar battery and a preparation method of the EVA film. The EVA film comprises the following components in percentage by weight: 80-90% of ethylene-vinyl acetate copolymer, 1-2% of tert-butyl peroxide, 0.5-1% of 3-aminopropyl triethoxysilane, 0.05-2% of tri(nonylphenyl)phosphite ester, 0.5-1% of butylperoxy2-ethylhexyl carbonate, 1-3% of 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyl ester and the balance of an organic solvent. The EVA film encapsulated in the solar battery is high in volume resistivity, high in transmittance and low in etiolation rate, and increases the photo-electricity conversion rate of a battery pack; the invention discloses a preparation method of the EVA film which is simple in technology, convenient to operate, good in dispersibility, good in tackiness and high in stability.

Description

technical field [0001] The invention relates to an EVA film encapsulated by a solar cell 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 t...

Claims

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Application Information

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IPC IPC(8): C09J7/00C09J123/08C09J11/06H01L31/048B29C47/92B29C48/92
CPCY02E10/50B29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895
Inventor 顾正忠陈忠斌
Owner ZHEJIANG KELI NEW MATERIAL TECH CO LTD