A surface impurity removal method for negative electrode material of waste lithium ion battery

By using digital twin technology and real-time data analysis to dynamically correct process parameters, the instability and material damage problems in the process of removing impurities from the surface of waste lithium-ion battery anode materials have been solved, achieving precise and intelligent impurity removal control and ensuring high-quality recycled materials.

CN122418104APending Publication Date: 2026-07-17JIANGSU CHUJIN NEW MATERIALS TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU CHUJIN NEW MATERIALS TECHNOLOGY CO LTD
Filing Date
2026-04-22
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the process of removing impurities from the surface of waste lithium-ion battery anode materials, the existing technology has difficulty adapting the fixed process parameters to anode materials from different sources, resulting in unstable impurity removal effect. It also lacks real-time sensing and online control capabilities, making it impossible to correct process parameters in a timely manner, which may lead to incomplete impurity removal or material damage.

Method used

A closed-loop control system for the entire process is constructed using digital twin technology. By collecting and analyzing physical process data in real time and comparing it with virtual simulation data, the virtual-real deviation value is dynamically calculated, the impurity removal process parameters are corrected in real time, and the impurity removal reaction is terminated by multi-dimensional collaborative verification, thereby achieving precise and intelligent control.

Benefits of technology

It achieves precise removal of impurities from the surface of waste lithium-ion battery anode materials, ensuring impurity removal efficiency and material protection, avoiding incomplete impurity removal or material damage caused by response lag or misjudgment, and providing a high-quality guarantee for reuse.

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Abstract

The application belongs to the technical field of resource recycling, and discloses a surface impurity removal method for negative electrode material of waste lithium ion battery; the method comprises the following steps: obtaining negative electrode powder to be removed from waste lithium ion battery negative electrode sheet; obtaining initial state parameters of the negative electrode powder to be removed, and inputting the initial state parameters and predefined impurity removal process parameters into a pre-constructed digital twin model to start virtual impurity removal simulation; starting entity impurity removal reaction on the negative electrode powder to be removed according to the impurity removal process parameters, and collecting entity process data stream and twin process data stream in real time; dynamically calculating virtual-actual deviation value, determining impurity removal compensation, and correcting impurity removal process parameters in real time; after the entity impurity removal reaction is terminated, surface impurity removal negative electrode material is obtained through solid-liquid separation, washing and drying; the application realizes real-time sensing of entity impurity removal reaction process deviation and dynamic correction of impurity removal process parameters, and improves the precision and intelligence of the surface impurity removal process of waste lithium ion battery negative electrode material.
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