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Earthworm grain resistant EVA adhesive film material for photovoltaic module

A photovoltaic module and adhesive film technology, applied in photovoltaic power generation, adhesives, electrical components, etc., can solve problems such as earthworm marks, achieve the effect of reducing earthworm marks and ensuring power

Active Publication Date: 2017-11-03
CECEP SOLAR ENERGY TECH (ZHENJIANG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a photovoltaic module anti-earthworm pattern EVA film material, to solve the problem of earthworm pattern phenomenon caused by the acetic acid generated by the aging degradation of EVA materials

Method used

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  • Earthworm grain resistant EVA adhesive film material for photovoltaic module
  • Earthworm grain resistant EVA adhesive film material for photovoltaic module
  • Earthworm grain resistant EVA adhesive film material for photovoltaic module

Examples

Experimental program
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Effect test

Embodiment 1

[0017] An anti-earthworm pattern EVA film material for photovoltaic modules, prepared by coordination of rare earth metal europium (Eu) and benzoic acid at a molar ratio of 1:2 to obtain europium (benzoic acid) 2 Metal compound, as acetic acid trapping agent, this acetic acid trapping agent is added in certain original EVA film formula to form a film, obtains the EVA film material of the present invention with acetic acid trapping performance, add-on is this original EVA film formula 0.2% of mass.

[0018] The original EVA adhesive film formula is the common EVA adhesive film formula existing in the prior art, and the present embodiment adopts each component by the following parts by weight proportioning as a certain original EVA adhesive film formula to illustrate:

[0019]

[0020] The anti-earthworm pattern EVA film material prepared in this example is used in photovoltaic modules. The EVA film material is close to the battery sheet, and the method of double 85 test + ul...

Embodiment 2

[0025] The difference from the anti-earthworm pattern EVA film material of a photovoltaic module in Example 1 is that samarium (benzoic acid) is prepared by coordinating the rare earth metal samarium (Sm) with benzoic acid at a molar ratio of 1:2. 2 Metal compound, as acetic acid trapping agent, this acetic acid trapping agent is added in certain original EVA film formula to form a film, obtains the EVA film material of the present invention with acetic acid trapping performance, add-on is this original EVA film formula 0.4% by mass, samarium (benzoic acid) 2 The chemical reaction to capture acetic acid is attached figure 1 shown.

[0026] The anti-earthworm pattern EVA film material prepared in this example is used in photovoltaic modules, the EVA film material is close to the battery sheet, and the method of double 85 test + ultraviolet light is used to track the earthworm pattern on the photovoltaic module. In this embodiment, the photovoltaic module of the anti-earthworm...

Embodiment 3

[0030] The difference from the anti-earthworm texture EVA film material of a photovoltaic module in Example 1 is that samarium (terebenzoic acid) is prepared by coordinating the rare earth metal samarium (Sm) with dibenzoic acid at a molar ratio of 1:2. 2 Metal compound, as acetic acid trapping agent, this acetic acid trapping agent is added in certain original EVA film formula to form a film, obtains the EVA film material of the present invention with acetic acid trapping performance, add-on is this original EVA film formula 0.3% of mass.

[0031] The anti-earthworm pattern EVA film material prepared in this example is used in photovoltaic modules, the EVA film material is close to the battery sheet, and the method of double 85 test + ultraviolet light is used to track the earthworm pattern on the photovoltaic module. In this embodiment, the photovoltaic module of the anti-earthworm pattern EVA film material does not appear earthworm pattern phenomenon after three months. Co...

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Abstract

The invention discloses an earthworm grain resistant EVA adhesive film material for a photovoltaic module. A metal compound is added in an EVA adhesive film formula to serve as an acetic acid catching agent, and the adding amount of the metal compound is 0.1-2.0% of the mass of the EVA adhesive film formula. The earthworm grain resistant EVA adhesive film material has the advantages that acetic acid produced through EVA degradation and decomposition is completely consumed by adding the metal compound catching the acetic acid in an original common EVA adhesive film formula and is fixed in an adhesive film, it is ensured that no free acetic acid movement phenomenon occurs in adhesive film ageing, namely the harm produced by acetic acid ageing is relieved, produced earthworm grains are remarkably decreased, the assembly power is ensured, power attenuation of the assembly is greatly reduced, and the service life of the assembly is prolonged.

Description

technical field [0001] The invention relates to a solar cell photovoltaic module, in particular to an earthworm-resistant EVA film material. Background technique [0002] The earthworm pattern phenomenon refers to the earthworm-like traces that appear on the surface of the solar cell in the photovoltaic module, and are also called snail patterns, lightning patterns, and snake-shaped spots. This phenomenon was first proposed by experts in the photovoltaic module industry in 2004. The specific cause is still inconclusive. Most researchers suspect that it is related to the microcracks of the cell, the silver paste material on the surface of the cell, and the water vapor penetration of the back sheet and EVA materials. The relationship between the earthworm pattern has a certain impact on the power generation of the module. [0003] The effect of cell microcracks and silver paste on the surface of the battery on the generation of earthworm marks can be solved by selecting and c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/06C09J7/00H01L31/048
CPCC08K5/098C09J7/00C09J11/06C09J123/0853C09J2423/04H01L31/048Y02E10/50
Inventor 陶静黄青松赵雷范维涛勾宪芳杨磊
Owner CECEP SOLAR ENERGY TECH (ZHENJIANG) CO LTD
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