Nickel electroplating process of electrode

Abstract

The invention provides a nickel electroplating process of an electrode. The nickel electroplating process of the electrode comprises the following specific steps of (1) pre-treating the electrode in sequence; (2) coating a layer of anti-plating protective coating on the position, needing to be welded, of the electrode, and performing protection before plating; (3) hanging the electrode on a hanger made of a material with good conductivity, carrying out preheating, immersing the electrode in the electroplating liquid of a plating tank, connecting a cathode, placing anodes on two sides at a proper distance, and carrying out electrifying to deposit nickel ions on the surface of the electrode; (4) after nickel plating, removing the anti-plating protective coating at the position needing to be welded, and exposing the surface which is not plated with nickel; and (5) carrying out post-treatment on the electrode of which the protection is removed. The welding position of the electrode is protected before plating, nickel plating is conducted through a rack plating technology, protection is removed after plating, the bare copper surface is exposed so that welding can be firm, nickel plating is conducted on the surfaces of other parts so that rust prevention and electric conduction quality of the electrode can be guaranteed, and the selective local electroplating technology is an international advanced technology.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to an electrode electroplating nickel plating process. Background technique [0002] At present, the electroplating process of power electrodes (hereinafter referred to as electrodes or electrode sheets) of IGBT power semiconductor accessories such as new energy vehicles directly affects the firmness of electrode welding. The traditional domestic electroplating method is to nickel-plate all the accessories, that is, to punch out the electrode pieces on the plate first, and then immerse all the electrode pieces in the electroplating solution for electroplating, so that all parts of the electrode pieces are plated with a nickel layer, which will cause The electrodes are weakly welded at the solder joints, or even fall off, which poses a fatal danger to the safety of the car. as attached figure 1 As shown, similar foreign products adopt electroplated plate punching process, wh...

AI Technical Summary

Problems solved by technology

The traditional domestic electroplating method is to nickel-plate all the accessories, that is, to punch out the electrode pieces on the plate first, and then immerse all the electrode pieces in the electroplating solution for electroplating, so that all parts of the electrode pieces are plated with a nickel layer, which will cause The electrodes are weakly welded at the solder joints, or even fall off, which poses a fatal danger to the safety of the car

as attached figure 1 As shown, similar foreign products adopt electroplated plate punching process, which is to pre-plate nickel layer on both sides of the plate, and then punch out the electrode sheet with nickel on both sides. The major defect of this electrode is that the electrode side is exposed. , it is very easy to cause oxidation and rust, which affects the service life and safety of IGBT

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