A kind of electrode electroplating nickel plating process

Abstract

An electroplating nickel-plating process for an electrode, comprising the following specific steps: (1) carrying out pretreatment to the electrode in sequence; (2) coating a layer of anti-plating protective paint on the electrode to be welded, and performing pre-plating protection; (3) ) hang the electrode on a hanger made of a material with good electrical conductivity, immerse it in the plating solution of the plating tank after preheating and connect the cathode, place the anode at an appropriate distance on both sides, and make nickel ions on the surface of the electrode after electrification Deposition; (4) After nickel plating, the anti-plating protective paint on the place to be welded is removed to expose the non-nickel-plated surface; (5) Post-treatment is performed on the electrode after removal of protection. The invention protects the welding part of the electrode before plating, uses the rack plating process to carry out nickel plating, removes the protection after plating, and exposes the bare copper surface, so that the welding is firm, and the surface of other parts is all nickel-plated to ensure the antirust of the electrode and conductive quality, this selective partial plating process is an international advanced process.

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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