Electroplating process and production line of solar cell sheet solder strip
A technology of solar cells and electroplating technology, applied in the direction of circuits, semiconductor devices, etc., can solve problems affecting welding products and welding equipment, poor quality, etc., to solve defects in appearance and performance, excellent quality, and overcome high energy consumption Effect
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[0025] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.
[0026] The invention changes the traditional hot-dip tin process, and adopts the electroplating process to electroplate the tin layer on the surface of the substrate copper strip, thereby producing continuous solar battery sheet solder strips, because the electroplating process itself has uniform coating thickness and excellent adhesion performance And other advantages, so the quality of the welding strip is excellent, and it is fully capable of automatic welding production of solar cells in the automatic welding line, which ensures the welding quality and improves the welding efficiency. The composition of the electroplating layer of the present invention can be pure Sn, or form a Sn-based composite solder from one or two or more elements of Ag, Cu, Bi, Ni, Au, Pd, and Pb, and each element contains 1- 40wt% Sn-based composite solder.
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