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EVA adhesive film for solar cell encapsulation and preparation method thereof

A solar cell and film technology, applied in circuits, adhesives, photovoltaic power generation, etc., can solve the problems of low volume resistivity and reduced power generation of photovoltaic modules, achieve high volume resistivity, optimize anti-PID ability, and good low temperature flexibility. Sexual and cohesive effects

Active Publication Date: 2016-04-13
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 adhesive film for solar cell encapsulation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The EVA adhesive 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%, vinyltrimethoxysilane 0.5%, β-(4-hydroxy-3,5-di-tert-butylphenyl)propionic acid 0.05% n-octadecyl ester, 0.5% tert-butyl peroxy 2-ethylhexyl carbonate, 1% cetyl 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 vinyltrimethoxysilane is a silane coupling agent;

[0043]The β-(4-hydroxyl-3,5-di-tert-butylphenyl) n-octadecyl propionate is an antioxidant;

[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] ...

Embodiment 2

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

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

[0055] Ethylene-vinyl acetate-based copolymer 90%, tert-butyl peroxybenzoate 2%, vinyltrimethoxysilane 1%, β-(4-hydroxy-3,5-di-tert-butylphenyl)propionic acid 2% n-octadecyl ester, 1% tert-butyl peroxy 2-ethylhexyl carbonate, 3% cetyl 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 rest of the EVA adhesive film of the solar cell encapsulation of the present embodiment is identical with embodiment 1, and difference is:

[0059] The EVA adhesive 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%, vinyltrimethoxysilane 0.9%, β-(4-hydroxy-3,5-di-tert-butylphenyl)propionic acid 2% n-octadecyl ester, 1% tert-butyl peroxy 2-ethylhexyl carbonate, 2% cetyl 3,5-di-tert-butyl-4-hydroxybenzoate, 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 (ethylene-vinyl acetate) adhesive film for solar cell packaging and a preparation method thereof. The EVA adhesive film is composed of the following components in percentage by mass: 80-90% of EVA copolymer, 1-2% of tert-butyl peroxybenzoate, 0.5-1% of vinyltrimethoxysilane, 0.05-2% of n-octadecyl beta-(4-hydroxy-3,5-di-tert-butyl-phenyl)propionate, 0.5-1% of tert-butyl-peroxyl-2-ethylhexyl carbonate, 1-3% of hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate and the balance of organic solvent. The EVA adhesive film for solar cell packaging can have high volume resistivity, high transmittance and low yellowing ratio, enhances the photoelectric conversion ratio of the battery pack, and has the advantages of favorable dispersivity, favorable adhesiveness and high stability; and the preparation method is simple in technique and convenient to operate.

Description

technical field [0001] The invention relates to an EVA adhesive film 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K5/14C08K5/5425C08K5/134C08K5/05C08J5/18B29C47/92H01L31/048B29C48/92
CPCB29C48/92B29C2948/92704C08J5/18C08J2323/08C08K5/1345C08K5/14C08K5/5425C08K2201/014C08L2203/16C08L2203/204C08L2203/206C09J7/00C09J11/06C09J123/0853C09J2203/322C09J2423/04H01L31/0481C08L23/0853B29C48/08B29C48/40Y02E10/50
Inventor 顾正忠陈忠斌
Owner 浙江兆泽实业有限公司