Heterogeneous double-face fluorine-containing solar battery backboard

Abstract

The invention discloses a heterogeneous double-face fluorine-containing solar battery backboard comprising a fluorine film, an adhesive layer, a thin film layer, a primary coat and a coating layer connected in sequence. The fluorine film is a polyvinylidene fluoride film or a polyvinyl fluoride film; the adhesive layer is a polyurethane two-component adhesive; the thin film layer is a PET film; the primary coat is a polyurethane adhesive; and the coating layer is a coating paint formed by dispersing base resin and microparticles like polytetrafluoroethylene or polyvinylidene fluoride in a solvent. The invention also discloses a production technology thereof. The adhesive and a primary paint are applied on two surfaces of the thin film layer respectively, and the fluorine film and the coating layer are finally formed on the adhesive and the primary paint. The heterogeneous double-face fluorine-containing solar battery backboard combines a conventional compound type backboard with a coating type backboard, is low in production cost, alleviates aging speed, improves effective service life of the backboard, and simultaneously improves bonding intensity with an EVA backboard glue film.

Description

technical field [0001] The invention relates to a solar cell photovoltaic module, in particular to a heterogeneous double-sided fluorine-containing solar cell back plate. Background technique [0002] At present, there are mainly two types of solar battery backsheets on the market: coating type and composite type. The composite type backsheet has the advantages of mature technology and good aging resistance, but its cost is high and the source of main raw materials is limited (imported). There is a weak point of low adhesion and instability with the solar cell module packaging film; while the coated backsheet has a certain price (cost) advantage and simple production process, but its long-term use effect is poor, especially when the ultraviolet radiation intensity is high. The shortcomings of large or less windy areas are exposed. In order to ensure that the backsheet has a certain aging resistance and reduce costs, a single-sided fluorine film backsheet design has emer...

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Problems solved by technology

[0002] At present, there are mainly two types of solar battery backsheets on the market: coating type and composite type. The composite type backsheet has the advantages of mature technology and good aging resistance, but its cost is high and the source of main raw materials is limited (imported). There is a weak point of low adhesion and instability with the solar cell module packaging film; while the coated backsheet has a certain price (cost) advantage and simple production process, but its long-term use effect is poor, especially when the ultraviolet radiation intensity is high. The disadvantages of large or less windy areas are exposed

In order to ensure that the backsheet has a certain aging resistance and reduce costs, a single-sided fluorine film backsheet design has emerged. Its weather resistance is worse than that of the double-sided fluorine-containing type, and it cannot meet the long-term use in outdoor areas with harsh climates.

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