Method to open up electro chemical energy storage devices and thermal treatment system

US11996528B2 · kind B2 · utility

Assignee

• ACCUREC RECYCLING GMBH · DE

Inventors

• Reiner Sojka · Düsseldorf, DE
• Albrecht Melber · Darmstadt, DE

Key dates

• Filing date: Dec 10, 2020
• Grant date: May 28, 2024
• Expiry date: Jan 4, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/84
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A method for opening up electrochemical energy storage devices in connection with a subsequent recovery of valuable materials contained therein as secondary raw materials, in which method the energy storage devices are opened up by a thermal treatment system to remove the electrolytes and reactive substances, before the thermally treated material is subjected to processing, whereby secondary raw materials in the thermally treated material are separated from one another. The thermal treatment is performed in an indirectly heated furnace under atmospheric pressure conditions or a slight overpressure relative to the ambient pressure of up to 20 mbar in a reducing atmosphere, and influence is exerted on the course of the thermal treatment process via the reducing atmosphere, as a control variable. Furthermore, a thermal treatment system is described for removing electrolytes and reactive substances in electrochemical energy storage devices and consequently for pyrolytic opening.