High-reflectivity photovoltaic black backboard

Abstract

The invention discloses a high-reflectivity photovoltaic black backboard which comprises a high-reflectivity base layer and a black gap light-transmitting layer. The black gap light-transmitting layer is arranged on the high-reflectivity base layer, the black gap light-transmitting layer is provided with a blank gap, and the width of the blank gap ranges from 0.1 micrometer to 50 micrometers, so that the requirements that light which can be absorbed and converted into electric energy by a battery piece can penetrate through the gap, and the gap cannot be identified by naked eyes, are met. According to the invention, the existing optimal modes of storage, transportation, cutting and packaging of the backboard are not changed, and most of light rays can penetrate through the black gap light-transmitting layer of the backboard, are reflected by the high-reflection base layer, are absorbed by the battery piece, especially the double-sided battery piece, and are converted into electric energy; the photoelectric conversion efficiency of the module can be greatly improved, heating of the module backboard is reduced, backboard cost is reduced, and module efficiency is improved.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a photovoltaic black backboard with high reflectivity. Background technique [0002] As a type of photovoltaic module with a special appearance, black solar cell modules are more suitable for roof and building integration projects to meet users' appearance requirements. Usually, in order to improve the photoelectric conversion efficiency, the backplane is generally a white backplane with high reflectivity, but if it is used in occasions with special aesthetic requirements such as roofs and buildings, an all-black module with a black backplane is generally used. Most of the black backsheets used by existing module manufacturers are made of black inner and outer materials, and part of the sunlight that penetrates the cells, especially the double-sided cells, and irradiates the gap between the cells is absorbed by the black backsheet and converted into heat energy. This makes...

AI Technical Summary

Problems solved by technology

However, this kind of black grid backplane requires high precision for the cutting and packaging of the module factory. Some deviations in cutting will lead to the scrapping of backplanes in batches, and the light in the gap between cells cannot be effectively used. Therefore, this kind of black grid backplane can only be cut by the backplane manufacturer before packaging and transportation. The cost of storage and transportation and the cost of wasted backplane materials are very high.

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