Photovoltaic welding strip tinning system and tinning method

Abstract

The invention belongs to the field of photovoltaic welding strips, and discloses a photovoltaic welding strip tinning system and tinning method. The tinning system comprises a machine frame, the machine frame is provided with a tin melting furnace and a tin layer adjusting device, wherein a wire pressing wheel is arranged in the tin melting furnace, the tin layer adjusting device is arranged at the position, located above the wire pressing wheel, of the machine frame, and photovoltaic welding strip sequentially passes through the wire pressing wheel in the tin melting furnace and the tin layeradjusting device. According to the tinning system, the surface of copper strip can be evenly coated with a layer of tin-lead alloy through a pneumatic conveyor, the thickness of a tinning layer on the surface of the photovoltaic welding strip can be adjusted by adjusting the pressure of compressed air at an air inlet of the pneumatic conveyor, the thickness of a single-side coating of the photovoltaic welding strip can be controlled between 10 micrometers and 30 micrometers, the thickness of the tin coating of the photovoltaic welding strip is kept consistent, and the stability of the surfacequality of a photovoltaic welding strip product is improved. According to the photovoltaic welding strip tinning system and the tinning method, the tinning method is simple and easy to operate and implement, and the thickness of the tin coating of the photovoltaic welding strip is controlled by adjusting on-off and flow of the compressed air.

Description

technical field [0001] The invention relates to the field of photovoltaic ribbons, in particular to a photovoltaic ribbon tinning system and a tinning method. Background technique [0002] At present, in the photovoltaic industry, there are two main production methods for photovoltaic ribbons in the market, one is electroplating; the other is hot-dip plating. Among them, the cost of electroplating is relatively high, and its market share in the photovoltaic industry is relatively small, while the mainstream hot-dip plating in the market has a low cost and has an absolute advantage in the photovoltaic industry. There is a core process in the production process of hot-dip plating, which is tin plating. The tin plating process affects important indicators such as the coating thickness and surface quality of the product. [0003] At present, in the production of hot-dip photovoltaic ribbon, the tinning method is mainly the air knife method, that is, gas wiping. The thickness o...

AI Technical Summary

Problems solved by technology

Therefore, the quality stability of the photovoltaic ribbon product produced by the existing air knife wiping method is not enough, and the scrap rate is high

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