Electroplating process and production line of solar cell sheet solder strip

Abstract

The invention discloses an electroplating process and electroplating production line of a solar cell sheet solder strip. The electroplating process comprises the following serial steps of: feeding, straightening and flattening, copper strip polishing and softening, electrolyzing for deoiling, copper ion regenerating, high-speed electroplating pretreatment, high-speed electrotinning, neutralizing, cleaning with pure water, tin layer repairing, ultrasonic cleaning, drying, solder strip destressing, fault detection, servo material collection and the like in turn. The electroplating production line is composed of a feeding part, electroplating and pretreatment and post-treatment parts, and a material collection part, which are sequentially connected. According to the invention, a high-performance weldable coating is obtained by adopting a high-grade electrochemical method, thus the defects of a tin hot-dipping process, such as high energy consumption, low yield and the like, are overcome, and efficient production is realized; multiple channels share an identical process, which is environmentally-friendly and energy-saving; the solder strip tin layer produced by adopting the electroplating process has adjustable thickness, very good uniformity and smooth and clean appearance without defects; and by adopting the electroplating process, the defects of tradition hot-dipping tin coating in the appearance and performance are avoided, and the high-quality solder strip can be produced.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to an electroplating process and assembly line for solar cell sheet welding strips. Background technique [0002] The traditional solar cell ribbon production adopts the hot-dip tin process. The copper strip as the substrate of the solder strip passes through a melting tin furnace. The tin material adheres to the surface of the substrate and forms a tin layer after condensation. The thickness of the tin layer produced by this process is generally At 20-25 microns, not only the amount of tin used is large, the appearance is not good, the uniformity is difficult to control, the conductivity is average, and it is very easy to produce tin slag, tin nodules, tin seams, pinholes and foreign objects. Therefore, some bad factors are added to the welding of solar cells, especially in the production of solar cells with a particularly large output, which is usually produced by automatic...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the disadvantages of the above-mentioned existing solar cell soldering strips being produced by hot-dip tin process, which has poor quality and affects subsequent welding products and welding equipment, the applicant provides an electroplating process and assembly line for solar cell soldering strips, which can efficiently High-quality production, the uniformity and appearance of the welding strip are improved, while saving tin consumption, reducing unit energy consumption, and increasing production

Images