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A solar cell back sheet and its preparation method and a solar cell assembly

A technology for solar cells and backsheets, applied in the field of solar cells, can solve the problems of increased water vapor transmission rate, poor bonding performance, and easy damp and heat aging, etc., to improve bonding performance, increase service life, and resist water vapor transmission sexually superior effect

Active Publication Date: 2016-07-27
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems of poor bonding performance between layers of the solar cell back sheet in the prior art, high cost, and easy humidity and heat aging, resulting in increased water vapor transmission rate

Method used

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  • A solar cell back sheet and its preparation method and a solar cell assembly
  • A solar cell back sheet and its preparation method and a solar cell assembly
  • A solar cell back sheet and its preparation method and a solar cell assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Preparation of fluorine-containing coating: 100 parts by weight of tetrafluoroethylene copolymer (Daikin Industry Co., Ltd., ZeffleGK570, solid content 65wt%), 30 parts by weight of titanium dioxide (DuPont, R706), 10 parts by weight of butyl acetate After the ester is pre-mixed under stirring, 150 parts by weight of 0.20 mm zirconia beads are added, and the pigment dispersant is used for dispersion at 3000 rpm for 30 minutes. Then, the zirconia beads were filtered out with a 200-mesh sieve, and 10 parts by weight of an isocyanate curing agent (Bayer, N3390) was added to obtain the white fluorine-containing coating of this example.

[0043] (2) Preparation of polyurethane coating: Dissolve 100 parts by weight of polyester resin (Toyobo, 680 resin) in 300 parts by weight of ethyl acetate, and then add 10 parts by weight of isocyanate curing agent (Bayer, N3390) to obtain this The polyurethane coating of the example.

[0044] (3) Preparation of heat and humidity resistant...

Embodiment 2

[0059] The solar cell back sheet S2 of this embodiment is prepared by the same steps as in embodiment 1, except that:

[0060] In step (3), the amount of EVA is 300 parts by weight, and the content of VA is 5 wt%.

Embodiment 3

[0062] The solar cell back sheet S3 of this embodiment is prepared by using the same steps as in embodiment 1, except that:

[0063] In step (2), 0.5 parts by weight of carbodiimide and 1.0 parts by weight of fumed silica are also added to the polyurethane coating.

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Abstract

The invention provides a solar cell back plate. The solar cell back plate comprises a fluorine-containing polymer paint curing coating layer, a polyurethane coating layer, an insulating substrate layer, an adhesive layer and a heat-moisture resistant layer from downside to upside, wherein the heat-moisture resistant layer is a mixture containing ethylene-vinyl acetate copolymer and polyolefin. The invention also provides a preparation method of the solar cell back plate and a solar cell component adopting the solar cell back plate. The solar cell back plate provided by the invention has excellent adhesion performance between the layers, good water steam resistant permeability before and after the heat-moisture treatment, and low cost.

Description

Technical field [0001] The invention belongs to the field of solar cells, and relates to a solar cell back sheet and a preparation method thereof and a solar cell component. Background technique [0002] Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect. They have three major advantages: permanence, cleanliness and flexibility, and their market prospects are broad. The photoelectric conversion elements of solar cell modules are susceptible to environmental effects such as moisture, oxygen, and ultraviolet rays, which cause severe degradation of photoelectric conversion performance. If it cannot resist the influence of environmental factors, its photoelectric conversion performance is easy to decay and lose its practical value. Therefore, the research of solar cell packaging materials is very important. In order to improve weather resistance and block ultraviolet rays and water vapor, two sheets of polyvinyl acetate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/049H01L31/18B32B27/08B32B27/28B32B27/32B32B27/40
CPCY02E10/50
Inventor 鲁遥
Owner BYD CO LTD