Method for pretreating waste lithium battery, multi-stage sorting method and related equipment

By performing multi-stage processing and sorting of waste lithium battery cells in an oxygen-free environment, combined with real-time monitoring and dynamic control of suspension parameters, the problem of incomplete copper-aluminum separation in the pretreatment of waste lithium batteries has been solved, achieving efficient material separation and recycling.

CN122183786APending Publication Date: 2026-06-12JIANGXI JINTONG NEW ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-03
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

In the existing technology, during the pretreatment of waste lithium batteries, the black powder is not completely separated from the copper and aluminum particles, and the black powder cannot be separated simultaneously and effectively, resulting in poor separation effect and difficulty in meeting the production requirements of high-value recycling.

Method used

Waste lithium battery cells are discharged, dried, crushed, pyrolyzed, and cooled in an oxygen-free environment. Combined with screening, magnetic separation, and air separation technologies, the suspension state parameters are monitored in real time, and the wind speed, vibration frequency, and airflow pressure of the air separation device are dynamically adjusted to separate copper particles, aluminum particles, and black powder. Positive electrode powder and negative electrode powder are further separated through flotation.

Benefits of technology

It achieves simultaneous and precise separation of copper and aluminum particles and black powder, improves material separation effect and overall recycling rate, ensures effective separation and drying of positive and negative electrode powders, and meets the requirements of high-value recycling.

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Abstract

This application relates to the field of lithium battery recycling technology, and particularly to a pretreatment method, multi-stage sorting method, and related equipment for waste lithium batteries. The pretreatment method for waste lithium batteries includes: discharging, drying, crushing, pyrolyzing, and cooling the battery cells to obtain processed materials; screening and magnetically separating the processed materials to obtain iron powder, a first black powder, and a copper-aluminum mixture; feeding the copper-aluminum mixture into an air classifier to determine the suspension state parameters of the copper-aluminum mixture in real time; based on the density and particle size distribution differences of copper and aluminum particles, combined with the suspension state parameters, adjusting the wind speed, vibration frequency, and airflow pressure of the air classifier to obtain copper and aluminum particles and a second black powder; collecting the first and second black powders and performing flotation treatment to separate the negative and positive electrode powders; drying the positive and negative electrode powders separately to obtain dried positive and negative electrode powders. The embodiments of this application can solve the problems of low copper-aluminum separation accuracy and the inability to simultaneously and effectively separate black powders due to black powder interference.
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