Solar cell back panel film with high bonding strength and preparation method thereof

A technology for solar cells and backplane films, applied in chemical instruments and methods, circuits, photovoltaic power generation, etc., can solve problems affecting battery life, extremely high coating technology requirements, solvent residues, etc., and achieve simple and compact structure , The effect of fewer production processes

Active Publication Date: 2013-02-13
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention is to mix fluorine-containing plastics with polymer fillers, inorganic fillers, etc. in a solvent to prepare a fluorine-containing plastic solution, and then coat it on the surface of the substrate to prepare a composite film, but there are problems such as solvent residue and solvent pollution in this method , and has extremely high requirements on coating technology
Therefore, it is necessary to improve the surface adhesion of the fluoroplastic weather-resistant layer to solve the problem that the fluoroplastic as a weather-resistant layer is easy to fall off during use and affects the service life of the battery.

Method used

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  • Solar cell back panel film with high bonding strength and preparation method thereof
  • Solar cell back panel film with high bonding strength and preparation method thereof
  • Solar cell back panel film with high bonding strength and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: the structure of solar cell back plate film is as figure 1 As shown, both sides of the polyester base layer are compounded with the weather-resistant layer by coating the adhesive bonding layer; from top to bottom are the weather-resistant layer 1, the adhesive layer 2, the polyester base layer 3, the adhesive layer 2, and the weather-resistant layer 1 .

[0022] The weather-resistant layer 1 is a mixture of 78% fluorine-containing plastic polyvinylidene fluoride (PVDF), 10% polymer filler, 10% inorganic filler, and 2% functional additives, with a thickness of 25 μm. The polymer filler is polymethyl methacrylate (PMMA), and the inorganic filler is nano-sized TiO 2 Powder, functional additives are antioxidant 1010 0.5%, light stabilizer 770 0.5%, light absorber UV-P 0.5%, silane coupling agent KH560 0.5%. The adhesive layer 2 is a polyurethane adhesive layer with a thickness of 25 μm. The polyester layer 3 is a polyethylene terephthalate layer with a thi...

Embodiment 2-5

[0026] Example 2-5: The structure and preparation method of the back sheet film are as described in Example 1, except that the mass ratios of polyvinylidene fluoride, polymethyl methacrylate, and TiO2 in the weather-resistant layer are different.

Embodiment 6

[0027] Embodiment 6: structure and preparation method are as described in embodiment 1, difference is: the fluorine-containing plastics in weather-resistant layer is ethylene-trifluorochloroethylene copolymer 53%, polymer filler PMMA10%, inorganic filler TiO 2 10%.

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Abstract

The invention relates to a solar cell back panel film and a preparation method thereof. The solar cell back panel film is characterized in that the two sides of a polyester base layer are composited with wear-resistant layers by coating adhesive bonding layers; the wear-resistant layers are fluorine-containing films prepared by mixing fluorine plastic with polymer fillers, inorganic fillers and functional auxiliaries, then extruding and granulating the mixture and then carrying out casting or film blowing; the fluorine plastic is an ethylene-chlorotrifluoroethylene copolymer or polyvinylidene fluoride and accounts for 50-80wt% of the wear-resistant layers; the polymer fillers are polyacrylic ester polymers and account for 10-30wt% of the wear-resistant layers; the inorganic fillers are oxides containing titanium, aluminium, tin and silicon and account for 10-20wt% of the wear-resistant layers; and the functional auxiliaries account for 0-2wt% of the wear-resistant layers. The solar cell back panel film has the following beneficial effects that good adhesiveness is ensured between the wear-resistant layers and packaging materials; and the back panel film has tight structure, less production processes and low cost.

Description

technical field [0001] The invention relates to the technical field of solar battery backplanes, in particular to a solar battery backplane film and a preparation method thereof. technical background [0002] The solar cell backsheet is located on the back of the solar cell panel, which protects and supports the cells, and needs to have reliable insulation, water resistance, and aging resistance. Since the backsheet plays an important role in determining the service life of solar cells in photovoltaic modules, with the rise of the photovoltaic industry in recent years, the backsheet industry has also become a hot spot of concern. At present, the commonly used structures of solar photovoltaic cell backsheets are TPT structure and TPE structure, among which T refers to DuPont’s Tedlar film, which is composed of polyvinyl fluoride (PVF) film, and P refers to polyethylene terephthalate (PET). Film, E refers to ethylene-vinyl acetate resin (EVA) film, and the three layers of fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08H01L31/048B32B37/16H01L31/049
CPCY02E10/50
Inventor 王婧蔡胜梅宗少杰王玉同张恒
Owner SHANDONG DONGYUE POLYMER MATERIAL
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