Production method of double-sided light aluminum foil for lithium battery current collector

Abstract

The invention provides a production method of double-sided light aluminum foil for a lithium battery current collector, the production method comprises the following steps that (1) a cast rolling process is conducted, specifically, the components of fed materials are adjusted, the fed materials comprise pure aluminum ingots and waste materials, wherein the weight of the pure aluminum ingots accounts for more than 99% of the total weight, the weight of silicon in the waste materials accounts for 0.1-0.2% of the total weight of the fed materials, and the weight of copper in the waste materials accounts for 0.1-0.2% of the total weight of the fed materials; (2) a cold rolling process is conducted; (3) a plate and strip process is conducted and comprises an intermediate annealing process; and (4) foil rolling process is conducted, and specifically, convexity adjustment and roughness adjustment are conducted on working rolls from the first pass to the fifth pass; and an aluminum foil blank with the thickness of 0.2-0.4 mm obtained after the intermediate annealing process is subjected to foil rolling through the first pass to the fifth pass in sequence, and after foil rolling is completed, the 0.009 mm double-sided light aluminum foil for the lithium battery current collector is obtained. According to the production method, the production efficiency of the double-sided light aluminum foil for the 0.009 mm lithium battery current collector can be improved.

Description

technical field [0001] The invention belongs to the field of lithium battery manufacturing, and in particular relates to a production method of a double-sided glossy aluminum foil for a current collector of a lithium battery. Background technique [0002] With the rapid development of the market economy, aluminum foil products are more and more widely used, from medicine, flexible packaging to cardboard, cigarette packaging, from wine labels, tubes to air conditioners, electronics, and then to containers, household, aluminum foil has gradually penetrated into the In the daily production of all walks of life and inventors. Among them, with the rapid development of the domestic electronics industry and the electric vehicle industry, the demand for various types of batteries is also increasing year by year, followed by the continuous increase in demand for related products. Aluminum foil for batteries is one of them. [0003] Aluminum foil for batteries refers to aluminum foi...

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Problems solved by technology

In addition, to achieve high strength and high elongation, its production is even more difficult

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