Insulating back plate for solar photovoltaic component

Abstract

The invention discloses an insulating back plate for a solar photovoltaic component and belongs to the technical field of solar photovoltaic cells. The solar photovoltaic component comprises a weather-resistant layer, an electric insulating layer and a thermal bonding layer, wherein the electric insulating layer is positioned between the weather-resistant layer and the thermal bonding layer; the weather-resistant layer is made from a mixture of polyvinylidene fluoride, acrylic resin and an inorganic material; the electric insulating layer is made from polyethylene glycol terephthalate and poly2,6-naphthalate or polyamide; and the thermal bonding layer is made from polyolefin. In the technical scheme, because the weather-resistant layer made from the polyvinylidene fluoride and the inorganic material in the prior art is modified into the weather-resistant layer made from the polyvinylidene fluoride, the acrylic resin and the inorganic material, and the acrylic resin and the polyvinylidene fluoride have high compatibility, the water vapor barrier effect and the ultraviolet resistance are enhanced and the service life of the solar photovoltaic component is guaranteed. Because the materials of the provided scheme are readily available and the cost of the insulating back plate is low, the insulating back plate can get away from the dependence on import and meets the requirement of industrialized mass production.

Description

technical field [0001] The invention belongs to the technical field of solar photovoltaic cells, and in particular relates to an insulating backplane for a solar photovoltaic module. Background technique [0002] As is well known in the industry, the overall structure of a solar photovoltaic cell includes: a frame (usually using an aluminum frame), a solar photovoltaic glass installed on the frame, and a battery sheet (also called a silicon wafer or silicon plate) located under the solar photovoltaic glass. ), hot melt adhesive layer (EVA layer), junction box and insulating backplane. Since solar photovoltaic modules are usually installed outdoors, it is undoubtedly required that the insulating backsheet has excellent weather resistance. [0003] The known structure of the insulating backplane has been introduced in detail by the published patent documents such as the background technology column of CN101582458A and CN101582459A, and is also known to the public by the discl...

AI Technical Summary

Problems solved by technology

However, since polyvinylidene fluoride itself is prone to orientation during film formation, and the added inorganic fillers tend to accelerate the decomposition of polyvinylidene fluoride, and the compatibility between inorganic fillers and polyvinylidene fluoride is relatively weak (deficient). , so the protective weather-resistant layer obtained by these two patent applications is prone to heterogeneous phase separation after a period of use, which will lead to the failure of the protective performance of the insulating backsheet, which in turn will affect the service life of the solar photovoltaic module

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