Dry recycling method for waste power lithium battery

Abstract

The invention relates to a dry recycling method for a waste power lithium battery, comprising the following steps: S1, crushing a battery cell of a waste power lithium battery by means of shearing toobtain a crushed electrode material and a diaphragm; S2, performing high-temperature treatment on the crushed electrode material, removing the adhesive, and grinding the crushed electrode material byusing a stirring mill to obtain electrode powder and a copper-aluminum mixture; S3, performing primary airflow separation on the electrode powder, the copper-aluminum mixture and the diaphragm to obtain an electrode powder and diaphragm mixture and a copper-aluminum mixture; S4, performing grading treatment on the electrode powder and diaphragm mixture to obtain the electrode powder and the diaphragm; and S5, performing secondary separation to obtain a copper foil and an aluminum foil. A complete pretreatment route is provided for waste power lithium batteries, and the copper foil, the aluminum foil, the diaphragm and the electrode powder are classified and recycled. A dry means is applied, so that the environmental pollution is reduced. The subsequent treatment pressure is reduced while resources are recycled. The method is a recycling and harmless pretreatment process.

Description

technical field [0001] The invention relates to the field of solid waste recovery and treatment, in particular to a dry recovery method for waste power lithium batteries. Background technique [0002] Lithium batteries have the characteristics of high working voltage, high energy density, long cycle life, good safety performance, clean and pollution-free, and are widely used in important fields such as transportation, electric power, mobile communications, new energy storage, and aerospace military industry. With the popularization and promotion of new energy vehicles, lithium batteries shine even more in the field of energy storage for new energy vehicles. Due to the high energy consumption and short service life of power lithium batteries, the amount of scrapping has increased sharply, causing serious pollution to the environment. At the same time, waste power lithium batteries contain a large amount of resources such as copper, aluminum, graphite, etc., and if they are no...

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Problems solved by technology

[0004] The present invention designs a dry recovery method for waste power lithium batteries, which solves the problems of low recovery rate of waste power lithium batteries, environmental pollution and high energy consumption in the existing pretreatment technology

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