RECYCLING METHOD FOR POSITIVE ELECTRODE PASTE OF SPENT LITHIUM-ION BATTERIES AND USE THEREOF - GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD

Title:

RECYCLING METHOD FOR POSITIVE ELECTRODE PASTE OF SPENT LITHIUM-ION BATTERIES AND USE THEREOF

Document Type and Number:

WIPO Patent Application WO/2024/055550

Kind Code:

A1

Abstract:

Disclosed in the present invention is a recycling method for positive electrode paste of spent lithium-ion batteries, the recycling method comprising the following steps: (1) crushing positive electrode paste of spent lithium-ion batteries in a crushing and pyrolysis device, introducing a heated inert gas into the crushing and pyrolysis device at the same time, bringing the inert gas into contact with the positive electrode paste of the spent lithium-ion batteries, and then allowing same to flow through a condenser for condensation and liquid discharging; (2) heating a crushed material obtained by crushing the positive electrode paste of the spent lithium-ion batteries in step (1), stopping the introduction of the inert gas and introducing an oxygen-containing gas instead at the same time, bringing the oxygen-containing gas into contact with the crushed material, and then allowing same to flow through a waste gas treatment system to receive a treatment; and (3) discharging the treated crushed material in step (2) to obtain positive electrode material particles. The recycling method for positive electrode paste of spent lithium-ion batteries can better realize the recycling of NMP.

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Inventors:

WANG TAO (CN)
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)

Application Number:

PCT/CN2023/082549

Publication Date:

March 21, 2024

Filing Date:

March 20, 2023

Export Citation:

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Assignee:

GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)

International Classes:

H01M10/54

Foreign References:

CN115472946A	2022-12-13
CN114695995A	2022-07-01
CN212732427U	2021-03-19
CN114388921A	2022-04-22
CN111088430A	2020-05-01

Attorney, Agent or Firm:

JIAQUAN IP LAW (CN)

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