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A kind of white eva for photovoltaic module encapsulation and its preparation method and application

A photovoltaic module packaging, white technology, applied in the direction of photovoltaic power generation, electrical components, semiconductor devices, etc., can solve the problems of poor compatibility, achieve the effect of simple and feasible method, high light transmittance, and prevent glue overflow

Active Publication Date: 2021-03-16
CSI CELLS CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, glass fiber cloth and EVA are different materials, and there is a problem of poor compatibility between the two.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]In this embodiment, the white EVA composite material for photovoltaic module encapsulation includes a white EVA layer, a transparent weather-resistant layer covered on the white EVA layer, and a silicon-titanium film-forming layer on the transparent weather-resistant layer, wherein the white EVA layer The thickness of the transparent weather-resistant layer is 400 μm, the thickness of the transparent weather-resistant layer is 30 μm, and the thickness of the silicon-titanium film layer is 3 μm;

[0044] Wherein the transparent weather-resistant layer is a polymer film layer formed by curing a curable polymer, and the curable polymer is hexafluoropropylene introduced into polytetrafluoroethylene molecular chains.

[0045] The preparation method is as follows:

[0046] (1) One side of the white EVA layer is coated with a transparent weather-resistant polymer coating, wherein the weather-resistant polymer coating includes curable polymers, curing agent diisocyanate and solv...

Embodiment 2

[0049] In this embodiment, the white EVA composite material for photovoltaic module encapsulation includes a white EVA layer, a transparent weather-resistant layer covered on the white EVA layer, and a silicon-titanium film-forming layer on the transparent weather-resistant layer, wherein the white EVA layer The thickness of the transparent weather-resistant layer is 500 μm, the thickness of the transparent weather-resistant layer is 40 μm, and the thickness of the silicon-titanium film layer is 2 μm;

[0050] Wherein the transparent weather-resistant layer is a polymer film layer formed by curing a curable polymer, and the curable polymer is hexafluoropropylene introduced into polytetrafluoroethylene molecular chains.

[0051] The preparation method is as follows:

[0052] (1) One side of the white EVA layer is coated with a transparent weather-resistant polymer coating, wherein the weather-resistant polymer coating includes a curable polymer, a curing agent diisocyanate and ...

Embodiment 3

[0055] In this embodiment, the white EVA composite material for photovoltaic module encapsulation includes a white EVA layer, a transparent weather-resistant layer covered on the white EVA layer, and a silicon-titanium film-forming layer on the transparent weather-resistant layer, wherein the white EVA layer The thickness of the transparent weather-resistant layer is 600 μm, the thickness of the transparent weather-resistant layer is 50 μm, and the thickness of the silicon-titanium film layer is 5 μm;

[0056] Wherein the transparent weather-resistant layer is a polymer film layer formed by curing a curable polymer, and the curable polymer is a perfluoroalkyl vinyl ether introduced into a polychlorotrifluoroethylene molecular chain.

[0057] The preparation method is as follows:

[0058] (1) One side of the white EVA layer is coated with a transparent weather-resistant polymer coating, wherein the weather-resistant polymer coating includes curable polymers, curing agent epoxy ...

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Abstract

The invention provides a white EVA (ethylene-vinyl acetate) composite material for photovoltaic module packaging, a preparation method of the white EVA composite material and an application of the white EVA composite material. The white EVA composite material comprises a white EVA layer, a transparent weather-resistant layer and a silicone and titanate film-forming layer, the transparent weather-resistant layer covers the white EVA layer, and the silicone and titanate film-forming layer is positioned on the transparent weather-resistant layer. According to the composite material, the transparent weather-resistant layer and the silicone and titanate film-forming layer cover the white EVA layer, abnormal appearances such as excessive glue of flanges are effectively restrained, the excessiveglue of the flanges is caused by high liquidity of a white EVA in a photovoltaic module, emitting and scattering of light rays of the white EVA cannot be affected, the power of the photovoltaic modulecan be effectively improved, and the preparation method of the composite material is simple, efficient, convenient, easy and applicable to industrial production.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic materials, and relates to a white EVA used for packaging photovoltaic modules and a preparation method and application thereof. Background technique [0002] In the structure of the existing solar photovoltaic modules, the solar cells are encapsulated by the EVA adhesive layer with high transparency, excellent anti-ultraviolet and aging resistance, good adhesion and elasticity, and the upper protective material (glass), the lower layer The protective material (backsheet or glass) is glued together. [0003] By laying white EVA on the back of the cell, the sunlight in the gaps of the photovoltaic cell array can be fully reflected and scattered, so that the cell can use sunlight multiple times, thereby increasing the power of the module. At present, the use of highly reflective white EVA packaging film has always been limited, mainly because of the heat and pressure during the lamination proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08J7/06C08J7/12H01L31/048H01L31/18C08L23/08
CPCC08J2323/08C08J2427/12C08J2427/18C08J7/0423H01L31/0481Y02E10/50
Inventor 赵圣云
Owner CSI CELLS CO LTD