Ethylene vinyl acetate (EVA) glue film for encapsulating solar battery

A technology of solar cells and adhesive films, applied in circuits, adhesives, photovoltaic power generation, etc., can solve the problems of easy loss of materials, difficulty in guaranteeing the life of EVA adhesive films, loss of fluorescent complexes, etc., to ensure service life and improve photoelectric conversion Efficiency, the effect of ensuring the ability to resist ultraviolet rays

Inactive Publication Date: 2012-07-11
SUZHOU TECHN SOLAR FILM MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned technical solution solves the effective utilization of ultraviolet light, the fluorescent complex is wrapped in EVA film. In the long-term strong light, high temperature and high humidity environment, this simple "wrapping" method is difficult to guarantee Fluorescent complexes are not lost
In fact, the substance fixed by this method is easy to lose, therefore, the life-span of EVA film is just difficult to guarantee.

Method used

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  • Ethylene vinyl acetate (EVA) glue film for encapsulating solar battery
  • Ethylene vinyl acetate (EVA) glue film for encapsulating solar battery
  • Ethylene vinyl acetate (EVA) glue film for encapsulating solar battery

Examples

Experimental program
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Embodiment 1

[0031] A kind of EVA adhesive film that is used for solar cell encapsulation, by mass, 100 parts of ethylene-vinyl acetate copolymer (VA is 32, MI is 40), adds cross-linking curing agent tert-butyl peroxide 2-ethylhexyl 0.9 parts of carbonate, 0.7 parts of triallyl isocyanurate as a cross-linking agent, 0.6 parts of coupling agent γ-(methacryloyloxy)propyl trimethoxysilane, 1,3 antioxidants, 5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-tri 0.3 parts of ketone, 0.2 parts of fluorescent complex, its structural formula is Rare earth ions Ln 3+ for Eu 3+ , the group R in the β-diketone ligand 1 and R 2 Both are phenyl, R in the enoic acid ligand 3 and R 4 Both are hydrogen. For the excitation spectrum of the europium fluorescent complex, see figure 1 as shown, figure 2 It is the emission spectrogram of the europium fluorescent complex, which shows that the fluorescent complex of the present invention can convert 280-400nm ultraviolet...

Embodiment 2

[0034] A kind of EVA adhesive film that is used for solar cell encapsulation, by mass, 100 parts of ethylene-vinyl acetate copolymer (VA is 32, MI is 40), adds cross-linking curing agent tert-butyl peroxide 2-ethylhexyl 0.9 parts of carbonate, 0.7 parts of triallyl isocyanurate as a cross-linking agent, 0.6 parts of coupling agent γ-(methacryloyloxy)propyl trimethoxysilane, 1,3 antioxidants, 5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-tri 0.3 parts of ketone, 0.2 parts of fluorescent complex, its structural formula is Rare earth ions Ln 3+ for Eu 3+ , the group R in the β-diketone ligand 1 and R 2 Both are phenyl, R in the enoic acid ligand 3 and R 4 Both are hydrogen.

[0035] The above combination is the formula and 0.14 parts of petroleum ether through mixing, vacuum feeding, extrusion molding, zero tension traction, cutting and winding and packaging processes to obtain an EVA film, which is called film (II).

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Abstract

The invention discloses an ethylene vinyl acetate (EVA) glue film for encapsulating a solar battery. The EVA glue film comprises the following components in part by mass: 100 parts of ethylene-vinyl acetate copolymer, 0.7 to 1.1 parts of crosslinking curing agent, 0.4 to 0.8 part of crosslinking aid, 0.4 to 0.8 part of coupling agent, 0.1 to 0.5 part of antioxidant and 0.1 to 0.5 part of fluorescence complex, wherein the mass percentage of the ethylene-vinyl acetate copolymer is 20 to 40 percent; the crosslinking curing agent is tert-butyl peroxide 2-ethyl hexyl carbonic ester; the crosslinking aid is triene propyl isocyanate trimer; and the coupling agent is gamma-(methyl propylene acyloxy)propyl trimethoxy silane. After the battery pack is heated and encapsulated, the olefinic bond of the fluorescence complex and the EVA perform copolymerization, so that the fluorescence complex is firmly fixed in the crosslinking cured EVA glue film through the chemical bond, loss of the fluorescence complex is effectively avoided, the service life of the battery pack is guaranteed, and ultraviolet light is effectively utilized.

Description

technical field [0001] The invention relates to an EVA adhesive film used for solar battery packaging. Background technique [0002] At present, during the production process of solar cells, the cells need to be packaged. The properties of the encapsulation material will largely determine the performance and lifetime of the solar cell module. A good encapsulation material must have a high degree of crosslinking (or low shrinkage), high peel strength, and low yellowing rate (or high visible light transmittance). [0003] EVA (ethylene-vinyl acetate copolymer) is a thermoplastic polymer material with a linear molecular structure. EVA is formed by copolymerization of ethylene and vinyl acetate under high temperature and pressure. EVA films with different transparency, softness and toughness can be obtained by adjusting the ratio of ethylene and vinyl acetate. After adding the cross-linking agent, the EVA film will be cross-linked and cured while encapsulating the battery, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06H01L31/048
CPCY02E10/50
Inventor 谢洪平
Owner SUZHOU TECHN SOLAR FILM MATERIAL
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