A kind of multi-layer heat-conducting photovoltaic backplane material

Abstract

The invention discloses a multilayer heat conduction type photovoltaic backboard material. Graphene is dissolved into absolute ethyl alcohol, and polyvinylpyrrolidone, the foaming agent and the filler are added, deionized water is added after reduced pressure distillation, and then heat conductive suspension is acquired by secondary distillation; then the heat conductive suspension is lifted and coated on an ultra-thin aluminum sheet to perform a heated and pressurized reaction, and thus a heat conductive aluminum-based thin sheet is acquired, and at last heat conductive silica gel and the absolute ethyl alcohol are sprayed on the surface of the heat conductive aluminum-based thin sheet, and then the multilayer heat conduction type photovoltaic backboard material is acquired by depressurizing and drying.The backboard provided by the invention has a higher heat conduction life, and a good high temperature resistance effect.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic materials, and in particular relates to a multilayer heat-conducting photovoltaic backboard material. Background technique [0002] With the continuous consumption of global fossil energy and the resulting huge energy and environmental problems, the photovoltaic industry, which can convert sunlight into electrical energy, is in the ascendant. During the actual use of photovoltaic modules, they generally need to withstand the damage and erosion of high temperature, ultraviolet radiation, and water vapor. The backsheet is mainly used for the packaging of photovoltaic modules. It has the characteristics of resistance to breakdown, weather resistance, and corrosion resistance, and can play a good role in protecting the modules. [0003] Existing backplane materials are generally composed of several polymer materials, such as TPT, TPE, FPE and other structures, but because the thermal conductivit...

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Problems solved by technology

[0003] Existing backplane materials are generally composed of several polymer materials, such as TPT, TPE, FPE and other structures, but because the thermal conductivity of polymer materials is generally low and cannot effectively dissipate heat, the heat generated by the operation of the components cannot Efficient export, resulting in heat accumulation

However, the working efficiency of crystalline silicon cells is related to the negative temperature coefficient. Excessively high temperatures not only lead to a sharp drop in power generation efficiency, but also affect the stability of packaging materials, resulting in accelerated aging of components, making it difficult to meet the 25-year lifespan.

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