Solar photovoltaic panel protective film

Abstract

The invention discloses a solar photovoltaic panel protective film. The solar photovoltaic panel protective film comprises an optical PET layer and a protective coating which is arranged on the surface of the optical PET layer, wherein the protective coating consists of following materials in parts by weight: polyacrylate, polyethylene oxide, 1,1,2,3,3,3-hexafluo-1-propylene, poly(1,1-vinyl-difluoride), cerium oxide and lithium fluoride. The polyacrylate is used as a main material, so that the high transmittance of the protective film can be guaranteed; by adding little fluorine-containing polymer, not only is the transmittance of the protective film under the sun exposure and non-sun exposure not affected, but also the corrosion resistance and abrasion resistance of the protective film can be improved; by adding the trace metal compound, the chemical and physical performance of the protective film can be obviously improved, on the basis of not affecting the high transmittance of the film, the low reflectance and low radiation absorption rate can be guaranteed, and the weather resistance, aging resistance and low temperature and high temperature resistance of the film also can be improved.

Description

technical field [0001] The invention relates to a polymer film, in particular to a polymer film for protecting a solar photovoltaic panel from natural environment erosion. Background technique [0002] At present, solar energy as a clean energy has been more and more widely used, thus the development of the photovoltaic industry is advancing by leaps and bounds. But as time goes by, the most important sensitive active parts in solar photovoltaic components will be affected by the external environment, such as wind, rain, snow, hail, various stains and so on. Therefore, it is necessary to add a protective layer on the surface of the photovoltaic component, and the protective layer needs to have high light transmittance, and low reflection and radiation absorption to light. [0003] In the prior art, a glass sheet is used more, but photovoltaic components have extremely high requirements on the glass sheet, which requires the glass to match with each semiconductor, so that th...

AI Technical Summary

Problems solved by technology

In addition, for glass, its fatal flaw is that the glass contains trace metal elements, such as Fe 3+ , which shows a weaker and narrower absorption around the wavelength of 400nm, Fe 2+ Shows strong and broad absorption in the infrared region

Glass therefore causes a significant loss of available radiation from sunlight and attempts to remove these trace metals from glass would be costly to obtain suitable raw materials

In addition, the refractive index of glass is relatively large, so it is easy to reflect and refract on the surface, resulting in the loss of light energy.

Although it has been reported in the literature that adding cerium to glass can improve the transmission loss of light energy, it is not worth recommending in light of the cost and the actual results obtained.

[0004] In addition, the glass itself is fragile. If the anti-crack performance of the glass is modified, the cost will increase. The glass itself also has a certain weight, which will increase the self-weight of photovoltaic components, thus limiting its use in certain fields. Applications

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