Method for recycling bipolar electrodes

By using an ultrasonic stripping process and a resin-coated ultrasonic tool head, the problem of reduced quality of active materials during bipolar electrode recycling has been solved, achieving efficient and low-cost bipolar electrode recycling.

CN122762880APending Publication Date: 2026-09-15TOYOTA JIDOSHA KK
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Patent Information

Application Number
CN202512025115.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2025-03-13
Filing Date
2025-12-30
Publication Date
2026-09-15

AI Technical Summary

Technical Problem

Existing technologies for recovering bipolar electrodes suffer from the problem of reduced quality of recovered active materials due to tool wear.

Method used

An ultrasonic stripping process is employed, using an ultrasonic tool head to apply vibration to the bipolar electrodes, thereby stripping the current collector and electrode active material layers separately. The resin coating of the ultrasonic tool head prevents wear, and the control device ensures precise operation.

Benefits of technology

It effectively inhibits the degradation of active material quality during the recycling process, achieves efficient and low-cost bipolar electrode recycling, and avoids metal contamination.

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Abstract

A recycling method of a bipolar electrode includes an ultrasonic peeling process in which a current collector, a first electrode active material layer, and a second electrode active material layer of the bipolar electrode are respectively peeled using ultrasonic waves from an ultrasonic tool head, the ultrasonic peeling process including: abutting an irradiation surface of the ultrasonic tool head, which irradiates ultrasonic waves, against the bipolar electrode, and applying vibration in a thickness direction of the bipolar electrode to the bipolar electrode; and abutting the irradiation surface of the ultrasonic tool head, which irradiates ultrasonic waves, against a side surface of the second electrode active material layer, and applying vibration in a direction along the other face of the current collector to the second electrode active material layer.
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