Solar cell module back veneer material

Abstract

A solar cell module back veneer material comprises a base coat layer having high adhesive strength with EVA, two layers of fluororesin-containing weather resistance coating films and an intermediate polymer basilemma between the two layers of fluororesin-containing resin weather resistance coating films, wherein at least one layer of fluororesin-containing resin weather resistance coating film hashigh light reflection performance, the base coat layer having high adhesive strength with EVA and the weather resistance coating film having high light reflection performance in the coating film arearranged at the side close to a cell sheet in an encapsulated cell module, the fluororesin-containing resin masking liquid has good coating uniformity and good adhesive force with the polymer basilemma, and contains high reflection filler component with the constituents as the follows according to parts by weight: 100 parts of fluororesin-containing resin, 3-20 parts of curing agent, 10-30 parts of high reflection filler, 0.0003-0.0001 part of catalyst, and 50-200 parts of solvent.

Description

technical field [0001] The invention relates to a back sheet material used as a solar battery module to protect the back of the solar battery module. Background technique [0002] The so-called solar photovoltaic power generation system refers to a new type of power generation system that uses the photovoltaic effect of solar cells to directly convert solar radiation into electrical energy. The crystalline silicon cell is one of the core parts of the solar photovoltaic power generation system. If the crystalline silicon cell is directly exposed to the atmosphere and is affected by meteorological factors such as light, heat, rain, and snow, the conversion efficiency and service life of the crystalline silicon cell will be greatly reduced. reduce. Therefore, a suitable packaging system is used to protect the solar module to improve the service life and conversion efficiency of the battery. The crystalline silicon cells in commercial solar panels need to be protected by a fro...

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Problems solved by technology

[0004] In the prior art, the publication number is the composite structure backboard of CN 101123278A, which uses an adhesive to bond two layers of polyvinyl fluoride film and one layer of polyester film together, such as figure 1 As shown: film 1 and film 5 are polyvinyl fluoride films; film 2 and film 4 are adhesive layers, such as acrylic resin, polyester resin, polyurethane resin, polyamide resin, alkyd resin, etc., which have good bonding properties; Film 3 is a polyester film, such as PET, PEN, etc., which has good mechanical strength, moisture resistance and insulation properties; this type of backsheet has good weather resistance, but has the disadvantages of high cost and low reflectivity

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