Flexible film photovoltaic reel-to-reel CSD spraying coating device

Abstract

The invention relates to a flexible thin film photovoltaic reel-to-reel CSD spraying and coating device, and solves the problem that a coating solution is easy to run off from two sides on the surface of a stainless steel substrate coiled material which is flatly conveyed, and the coating is not uniform. The device comprises an unwinding shaft, a winding shaft and a plurality of conveying rollers. A film coating coiled material output by the unwinding shaft sequentially passes through the conveying rollers and then is wound on the winding shaft, a film coating section is arranged behind the unwinding shaft, a film coating solution spraying nozzle is arranged above the front end of the film coating section, and a plurality of side supports for lifting the side edges of the film coating coiled material upwards are arranged on the two sides of the film coating section. A plurality of pressing wheels are arranged on the inner sides of the side supports. According to the film coating coiled material, a lifting maintaining structure with the low middle and the two high sides is formed in the coating section, it is ensured that when a film coating solution is maintained to be deposited on the surface of the film coating coiled material, the liquid level height of the solution is consistent, meanwhile, reverse backflow cannot be formed on the two sides of a coating film, the uniformity of transverse coating of the film coating coiled material is ensured, and the continuity of longitudinal film coating is achieved; and the industrial production requirement of roll-to-roll CSD spray film coating can be met.

Description

technical field [0001] The invention belongs to the field of solar cell production, and relates to a production and processing equipment device of a flexible thin-film solar cell, in particular to a flexible thin-film photovoltaic roll-to-roll CSD spray coating device. Background technique [0002] A flexible solar cell is formed on a flexible and rollable substrate with a solar photovoltaic material coating layer. In order to improve production efficiency, the production of flexible solar cells generally uses continuous stainless steel substrates that are transported roll-to-roll for continuous production. In the field of thin-film photovoltaics, CSD (Chemical Solution Deposition Thin Film) is a widely used substrate coating process, which can achieve efficient and large-scale mass production. Traditional CSD is used on ultra-thin stainless steel substrate or glass substrate coating process. In the chemical water bath deposition coating process, the substrate surface is fl...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that in the ultra-thin flexible thin film photovoltaic roll-to-roll CSD spray coating process, the solution is easily lost from both sides due to the gravity of the edge solution on the surface of the stainless steel base coil that is transported flat, resulting in the inconsistency of the horizontal solution level of the coating, resulting in In order to solve the problem of uneven overall coating, a flexible thin-film photovoltaic roll-to-roll CSD spray coating device is provided, which can keep the reaction solution on the surface of the stainless steel substrate and continue to react to ensure the quality of the coating

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