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Solar cell encapsulating EVA (ethylene vinyl acetate copolymer) adhesive film with high light transmittance and preparation method of adhesive film

A solar cell, high light transmittance technology, applied in the direction of adhesives, film/sheet adhesives, non-polymer adhesive additives, etc. The effect of good thermal stability, good soil addition performance and good transparency

Active Publication Date: 2017-12-22
NINGBO HUASHUN SOLAR ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the anti-aging performance of the EVA film is improved after this addition, it also seriously affects the light transmittance and other mechanical properties of the EVA film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The thickness of the EVA adhesive film is 0.8mm, according to the weight fraction, including the raw materials of the following weight fraction: 100 parts of EVA resin, 0.5 part of plasticizer, 0.1 part of photoelectric conversion rate enhancer, 1 part of anti-aging agent, 1.5 parts of barrier agent, 1 part of dispersant, 1 part of coupling agent, 1 part of crosslinking agent.

[0034] The content of vinyl acetate (VA) in the EVA film is 32%, and the plasticizer is composed of spiropyran and phthalate plasticizer at a mass ratio of 1:4. The plasticizer is composed of butyl benzyl phthalate (BBP) and diethyl phthalate (DMP) in a mass ratio of 3:1. The photoelectric conversion rate enhancer is a bonded macromolecular rare earth complex, and the bonded macromolecular rare earth complex is 6-(acryloyloxy)naphthalene-2-carboxylic acid-europium (p-NJS-Eu). The anti-aging agent is composed of light stabilizer and antioxidant according to the mass ratio of 1:1; the light stabi...

Embodiment 2

[0038] The thickness of EVA adhesive film is 1mm, and according to weight fraction, it comprises the raw material of following weight fraction: 100 parts of EVA resins, 1.5 parts of plasticizers, 0.2 parts of photoelectric conversion rate enhancers, 3 parts of antioxidants, 2 parts of barrier agents, 2 parts of dispersant, 2 parts of coupling agent, 2 parts of crosslinking agent.

[0039] The content of vinyl acetate (VA) in the EVA film is 32%, and the plasticizer is composed of spiropyran and phthalate plasticizer at a mass ratio of 1:4. The plasticizer is composed of butyl benzyl phthalate (BBP) and diethyl phthalate (DMP) in a mass ratio of 3:1. The photoelectric conversion rate enhancer is a bonded macromolecular rare earth complex, and the bonded macromolecular rare earth complex is 6-(acryloyloxy)naphthalene-2-carboxylic acid-europium (p-NJS-Eu). The anti-aging agent is composed of light stabilizer and antioxidant according to the mass ratio of 1:1; the light stabilize...

Embodiment 3

[0043] The thickness of the EVA adhesive film is 1.1mm, and according to the weight fraction, it includes the raw materials of the following weight fraction: 100 parts of EVA resin, 2.5 parts of plasticizer, 0.3 parts of photoelectric conversion rate enhancer, 4 parts of anti-aging agent, 2.5 parts of barrier agent , 2 parts of dispersant, 3 parts of coupling agent, 3 parts of crosslinking agent.

[0044]The content of vinyl acetate (VA) in the EVA film is 32%, and the plasticizer is composed of spiropyran and phthalate plasticizer at a mass ratio of 1:4. The plasticizer is composed of butyl benzyl phthalate (BBP) and diethyl phthalate (DMP) in a mass ratio of 3:1. The photoelectric conversion rate enhancer is a bonded macromolecular rare earth complex, and the bonded macromolecular rare earth complex is 6-(acryloyloxy)naphthalene-2-carboxylic acid-europium (p-NJS-Eu). The anti-aging agent is composed of light stabilizer and antioxidant according to the mass ratio of 1:1; the...

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Abstract

The invention relates to a solar cell encapsulating EVA (ethylene vinyl acetate copolymer) adhesive film with high light transmittance. The solar cell encapsulating EVA adhesive film is characterized in that the thickness of the EVA adhesive film is 0.8 mm-1.1 mm, and the EVA adhesive film is prepared from raw materials in parts by weight as follows: 100 parts of EVA resin, 0.5-2.5 parts of a plasticizer, 0.1-0.3 parts of a photoelectric conversion rate enhancer, 1-4 parts of an anti-aging agent, 1.5-2.5 parts of a blocking agent, 1-2 parts of a dispersing agent, 1-3 parts of a coupling agent and 1-3 parts of a cross-linking agent. Firstly, the raw materials are added to a mixer proportionally and mixed into uniform components, the components are subjected to melt mixing by a banbury mixer and then subjected to extrusion and pelletizing, and the EVA adhesive film is obtained. According to the prepared EVA adhesive film, the light transmittance of the adhesive film is not influenced and the mechanical properties are greatly improved while properties and photoelectric conversion efficiency of the adhesive film are improved with addition of multiple additives.

Description

technical field [0001] The invention belongs to the technical field of solar cell encapsulating adhesive films, in particular to an EVA adhesive film for encapsulating solar cells with high light transmittance and a preparation method thereof. Background technique [0002] Compared with traditional fossil fuel energy, solar energy is clean and renewable, and photovoltaic energy is abundant. Almost all other known energy sources come directly or indirectly from solar energy. Effective and rational use of solar energy is an important direction of energy development in the world today. In recent years, my country's solar energy industry has developed rapidly and has become the world's largest solar cell manufacturer in one fell swoop. EVA (ethylene-vinyl acetate copolymer) film is currently the most commonly used material in the solar cell packaging process. [0003] In order to reduce the damage to solar cell components caused by different environmental conditions in nature, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/04C09J11/06C09J7/00
CPCC09J7/00C09J11/04C09J11/06C09J123/0853C08L1/28C08K13/02C08K5/12C08K5/1345C08K5/524C08K5/3435C08K3/34C08K3/04
Inventor 吴玉非曾灵华王春健李锁春
Owner NINGBO HUASHUN SOLAR ENERGY TECH
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