Copper foil surface chromic anhydride passivating treatment process

Abstract

The invention discloses a copper foil surface chromic anhydride passivating treatment process. The copper foil surface chromic anhydride passivating treatment process comprises the steps of copper foil treatment, degreasing treatment, physical roughening, chemical roughening, curing treatment, obstruction layer arranging, passivation treatment and drying treatment. According to the process, 2000#abrasive paper is used for grinding, ground copper foil is put into a CuSO4 solution contained in a roughening groove to be subjected to chemical roughening, the physical roughening and the chemical roughening are combined, the roughening effect is greatly improved, the better roughening effect is achieved, after curing, alloy liquid is mixed liquid formed through mixing of alloy oxide and phosphoric acid and is adopted for making an obstruction layer, the isolation effect is improved, the oxidation resistance capacity is improved, when passivating treatment is carried out, a passivation powerbinding post is moved backwards from a previous conductive roller, the passivating effect is improved, in the roughening, curing and passivating process, the drug supplementing manner is changed into24-h supplementing of a metering pump from one-time adding, the drug supplementing manner is changed, and the treatment effect is better improved.

Description

technical field [0001] The invention relates to the technical field of copper foil surface treatment, in particular to a copper foil surface chromic anhydride passivation treatment process. Background technique [0002] With the development of electronic information industry, new energy vehicle industry, wind power generation, solar power generation, high-speed rail, and urban rail transit, the demand for lithium batteries will increase rapidly. High-precision lithium battery copper foil will be widely used in all lithium batteries such as electric vehicles, handheld electronic devices, and energy storage power stations. As the current collector of its high energy storage system, electronic copper foil is an irreplaceable basic material. The surface treatment process is relatively traditional, and the effect on the surface treatment of copper foil is not good. Generally, roughening, curing, passivation treatment, roughening, curing and passivation treatment process are old, ...

AI Technical Summary

Problems solved by technology

High-precision lithium battery copper foil will be widely used in all lithium batteries such as electric vehicles, handheld electronic devices, and energy storage power stations. As the current collector of its high energy storage system, electronic copper foil is an irreplaceable basic material. The surface treatment process is relatively traditional, and the effect on the surface treatment of copper foil is not good. Generally, roughening, curing, passivation treatment, roughening, curing and passivation treatment process are old, and the desired effect cannot be achieved during treatment, so , it is necessary to design a copper foil surface chromic anhydride passivation treatment process

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