Back panel of solar cell and preparation method thereof

A technology for solar cells and back sheets, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve the problems of easily fluctuating adhesive layer thickness, difficult PVF bonding, long operating cycle, etc., and is suitable for large-scale promotion. Application, simplified molding process, long service life effect

Active Publication Date: 2011-08-17
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3M has been developing THV (tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride) fluorine-containing resin to prepare THV/PET/EVA structure backsheets to solve the problem that PVF is difficult to bond; some American companies try to use PVDF ( Polyvinylidene fluoride), ECTFE (ethylene chlorotrifluoroethylene copolymer), ETFE (ethylene tetrafluoroethylene copolymer) instead of PVF as the backsheet material, but whether it is TPT, TP

Method used

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  • Back panel of solar cell and preparation method thereof
  • Back panel of solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The structure of the solar cell backplane is as figure 1 shown. Wherein, 1 layer is bonding weather-resistant layer, and thickness is 25 microns, and the weight ratio of main raw material PVDF resin and EVA resin is 75: 25, accounts for 85% of bonding weather-resistant layer gross weight, adds mixing aid I: 13% by weight Titanium dioxide, 0.5% by weight of UV absorber UVP-327, 1% by weight of 2,2'-methylene-bis-(4-methyl-6-tert-butylphenol) and 0.5% by weight of peroxide Hydrogen dicumyl, said weight ratio is based on the weight of the bonding weather-resistant layer 1. The 2nd layer is the adhesion enhancement layer, the thickness is 250 microns, the weight ratio of main raw materials PET resin and PMMA resin is 70: 30, accounts for 90% of the total weight of the adhesion enhancement layer, adds mixing auxiliary agent II: titanium dioxide of 8.5% by weight , 0.5% by weight of UV absorber UVP-327 and 1% by weight of 2,2'-methylene-bis-(4-methyl-6-tert-butylphenol), th...

Embodiment 2

[0046] The structure of the solar cell backplane is as figure 1 shown. Wherein, 1 layer is bonding weather-resistant layer, and thickness is 35 microns, and the weight ratio of main raw material PVDF resin and EVA resin is 70: 30, accounts for 80% of the total weight of blended gold layer, adds the titanium dioxide of 17% weight, 1 % weight of light stabilizer GW-540, 1.2% weight of two (3,5-tertiary butyl-4-hydroxyl phenyl) sulfide and 0.8% weight of dicumyl oxide (DCP), the weight It is based on the weight of the adhesive weather-resistant layer 1. The 2 layers are the bonding enhancement layer, the thickness is 180 microns, the weight ratio of the main raw materials PET resin and PMMA resin is 80:20, accounting for 90% of the total weight of the blended gold layer, adding 8% by weight of titanium dioxide, 1% by weight of Light stabilizer GW-540 and 1% by weight of bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide, the weight being based on the weight of the adhesion-enhanci...

Embodiment 3

[0049] The structure of the solar cell backplane is as figure 1 shown. Among them, one layer is a bonding weather-resistant layer with a thickness of 15 microns. The weight ratio of the main raw material PVDF resin to EVA resin is 90:10, accounting for 91% of the total weight of the blended gold layer, adding 6% by weight of titanium dioxide, 1.5 % by weight of UV absorber UV-9, 1.2% by weight of 2,6-tertiary butyl-4-methylphenol and 0.3% by weight of benzoyl peroxide (BPO), said weight is based on bond weathering Weight meter for layer 1. The 2 layers are the bonding enhancement layer, the thickness is 300 microns, the weight ratio of the main raw materials PET resin and PMMA resin is 60:40, accounting for 80% of the total weight of the blended gold layer, adding 17% by weight of titanium dioxide, 1.5% by weight of UV absorber UV-9 and 1.5% by weight of 2,6-tertiary butyl-4-methylphenol based on the weight of the adhesion enhancing layer 2. The third layer is a bonding moi...

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Abstract

The invention relates to a back panel of a solar cell and a preparation method thereof. The solar back panel is provided with three polymer film layers from top to bottom, namely an adhesive weatherable layer, an adhesive reinforcing layer and an adhesive moisture-retarding layer, wherein the adhesive weatherable layer is a PVDF(polyvinylidene fluoride)/EVA (ethylene vinyl acetate) alloy layer, the adhesive reinforcing layer is a PET (polyethylene terephthalate)/PMMA (polymethyl methacrylate) alloy layer, and the adhesive moisture-retarding layer is a PVDF/PVB (polyvinyl butyral) alloy layer. In the preparation method, a multi-layer melting and co-extrusion method is adopted for realizing interface-free fusion of the three film layers, and a composite film can achieve good dimensional stability by online high-temperature shaping. The structure of the back panel of the solar cell only comprises the three layers, an adhesive layer does not need to be used, the preparation process is simple, the steps of sizing and hot-pressing are omitted, and the production efficiency is high; and simultaneously, the back panel has excellent performances and is in line with the packaging requirements of the solar cell.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic cells, and in particular relates to a solar cell backboard and a preparation method thereof. Background technique [0002] Solar cell backsheet is an important auxiliary material in the photovoltaic industry, and its high-end market has been monopolized by foreign countries. The mainstream backplane structures on the market are TPT from European Isovolta and TPE from American Madico, where T is DuPont’s Polyvinyl fluoride (PVF) film, P is polyethylene terephthalate (PET) film, E is ethylene-vinyl acetate copolymer (EVA) film. 3M has been developing THV (tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride) fluorine-containing resin to prepare THV / PET / EVA structure backsheets to solve the problem that PVF is difficult to bond; some American companies try to use PVDF ( Polyvinylidene fluoride), ECTFE (ethylene chlorotrifluoroethylene copolymer), ETFE (ethylene tetrafluoroethylen...

Claims

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Application Information

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IPC IPC(8): H01L31/048H01L31/18B32B27/08B32B27/18H01L31/049
CPCY02E10/50Y02P70/50
Inventor 王婧张永明张恒王亚蔡胜梅赵宽
Owner SHANDONG DONGYUE POLYMER MATERIAL
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