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Solar battery encapsulation adhesive film

A technology for solar cells and encapsulation films, applied in circuits, adhesives, photovoltaic power generation, etc., can solve problems such as shortening the service life of the film, yellowing of the film, affecting the photoelectric conversion efficiency of solar cells, and reducing the aging yellowing index. , high and low temperature aging resistance, and the effect of moisture and freezing aging resistance

Active Publication Date: 2012-11-14
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the film is in a state of dilute oxygen or oxygen-free (such as film processing, solar cell packaging lamination process, damp heat aging process, etc., especially the damp heat aging process is more prominent), the polymer in the film And the peroxide initiator will generate a large number of alkyl radicals (R ), which cannot be captured by antioxidants, and the alkyl radicals (R ) will cause the aging of the film The acceleration of the process leads to yellowing of the film, which directly reduces the light transmittance of the film, making it impossible for the film to be used for a long time in a very harsh and complex outdoor climate, which seriously affects the photoelectric conversion efficiency of the solar cell. The service life of the adhesive film is greatly shortened, and the operating cost of solar power generation is increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The ratio of raw materials of the present invention is calculated in the following parts by weight.

[0046] Basic raw material: ethylene-vinyl acetate copolymer-100 parts; the present invention has specific requirements for the content of vinyl acetate in the ethylene-vinyl acetate copolymer, if the content of vinyl acetate in the ethylene-vinyl acetate copolymer is too high (usually ≥ 40%), the viscosity of ethylene-vinyl acetate copolymer will decrease, the strength will decrease, and the polarity will increase, resulting in easy flow out of the solar cell module during use, and will affect the tear resistance of the solar cell module during use cracking; if the vinyl acetate content in the ethylene-vinyl acetate copolymer is too low (usually <25%), the processing performance will be reduced, the finished film will become too hard, and it will not be easy to defoam during the manufacture of solar cell modules; therefore, The vinyl acetate content in the ethylene-viny...

Embodiment 2

[0054] The ratio of raw materials of the present invention is calculated in the following parts by weight.

[0055] Basic raw material: ethylene-vinyl acetate copolymer-100 parts, the content of vinyl acetate in ethylene-vinyl acetate copolymer is 30%;

[0056] Organic peroxide: o-tert-butyl-o-isopropyl-mono-peroxycarbonate-0.6 part;

[0057] UV absorber: 2-hydroxy-4-methoxybenzophenone-0.2 part, 2-hydroxy-4-dodecyloxybenzophenone-0.2 part, 2,4-dihydroxybenzophenone -0.2 copies;

[0058] Light stabilizers: N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine and 2,4-dichloro-6-(1, 1,3,3-tetramethylbutyl) amino-1,3,5-triazine polymer - 0.3 parts;

[0059] Antioxidant: tetrakis (2,4-di-tert-butylphenyl-4,4'-biphenyl) bisphosphite - 0.1 part, pentaerythyl stearyl diphosphite - 0.1 part;

[0060] Carbon free radical scavenger: N,N-di(octadecyl)hydroxylamine-0.7 parts.

[0061] According to the preparation method of Example 1, the test ethylene-vinyl acetate copolymer...

Embodiment 3

[0063] The ratio of raw materials of the present invention is calculated in the following parts by weight.

[0064] Basic raw material: ethylene-vinyl acetate copolymer-100 parts, the content of vinyl acetate in ethylene-vinyl acetate copolymer is 28%;

[0065] Organic peroxides: o-tert-butyl-o-(2-ethylhexyl)-mono-peroxycarbonate-0.5 parts, o-tert-butyl-o-isopropyl-mono-peroxycarbonate Esters - 0.5 parts;

[0066] UV absorber: 2-hydroxy-4-n-octyloxybenzophenone-0.1 part, 2-hydroxy-4-acryloyloxyethoxybenzophenone-0.1 part;

[0067] Light stabilizers: N,N'-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine and 2,4-dichloro-6-(1, 1,3,3-tetramethylbutyl) amino-1,3,5-triazine polymer - 0.1 parts;

[0068] Antioxidant: pentaerythritol bisphosphite bis(2,4-di-tert-butylphenyl)-0.07 part, tris(nonylphenyl)phosphite-0.07 part;

[0069] Carbon free radical scavenger: N,N,-dihydrogenated rapeseed oil alkyl-N-methyl nitrogen oxide-1 part.

[0070] According to the preparation m...

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Abstract

The invention discloses a solar battery encapsulation adhesive film which comprises the following raw materials in parts by weight: 100 parts of ethylene-vinyl acetate polymer, 0.1-5 parts of organic peroxide, 0.05-10 parts of ultraviolet absorber, 0.05-5 parts of light stabilizer, 0.01-10 parts of antioxidant and 0.01-10 parts of carbon free radical scavenger, wherein the content of vinyl acetate polymer in the ethylene-vinyl acetate polymer is 25-35%; and the carbon free radical scavenger is mixture of one or more than two of benzofuranone, hydroxylamine, tertiary amine, bisphenolmonoacryate. In the invention, harmful alkyl free radicals (R.) generated by the adhesive film in thin oxygen or anaerobic state can be scavenged effectively, so that the properties of heat and humidity resisting, ultraviolet ray resisting, high / low temperature resisting, humidity-freeze resisting the like of the adhesive film are improved, the ageing and xanthochromia indexes are effectively reduced, higher light transmittance of the adhesive film is ensured, and the high efficiency of photoelectric conversion efficiency of solar batteries is ensured.

Description

technical field [0001] The invention relates to an EVA adhesive film for solar battery packaging. Background technique [0002] There are two methods of solar power generation, one is light-heat-electricity conversion, and the other is light-electricity direct conversion; among them, the light-electricity direct conversion method is to use the photoelectric effect to directly convert solar radiation energy into electrical energy , the core and basic device of this conversion is the solar cell. In order to ensure that the photoelectric conversion performance of the solar cell is not attenuated, the solar cell must be encapsulated in an adhesive film with a corresponding protective effect, and the adhesive film is required to have high light transmittance, so as to ensure a high photoelectric conversion efficiency of the solar cell . [0003] The traditional solar cell encapsulation film is made of ethylene-vinyl acetate copolymer as the main raw material, and then equipped ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J7/00C09J11/06H01L31/048
CPCY02E10/50
Inventor 卢毅黄赋崔隆宇周文华吴红兵钟连兵肖毅
Owner DONGFANG TURBINE CO LTD
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