TREATMENT METHOD AND TREATMENT SYSTEM FOR WASTE LITHIUM ION BATTERY

WIPO Patent Application WO/2023/007868

A1

This treatment method for a waste lithium ion battery is for recovering lithium from a waste lithium ion battery containing phosphorus as a positive electrode active material, the method comprising: a thermal decomposition step in which the waste lithium ion battery is thermally decomposed by roasting to produce a roasted product containing the positive electrode active material; and a recovery step in which the roasted product is immersed in water to elute the lithium, and then the lithium is recovered, wherein the thermal decomposition step includes a roasting step in which the waste lithium ion battery is roasted at a predetermined first temperature, and a mixing step in which an alkali metallic salt other than lithium is mixed with the positive electrode active material of the waste lithium ion battery before the roasting step.

OSAWA HIROAKI
TAKADA SHOJI
YAMASHITA MARIKO
TSUZAWA MASAKI
NAGAI RYOSUKE
SUGATA MASAHIRO
ANDO FUMINORI
LI DAMING
ZHAO FENGWA
LI YANG
TANG WENFANG
SONG MINGJUN
YANG HONGFENG

PCT/JP2022/016749

February 02, 2023

March 31, 2022

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KAWASAKI HEAVY IND LTD (JP)
CHINA CONCH VENTURE HOLDINGS LTD (CN)
ANHUI CONCH KAWASAKI ENERGY CONSERVATION EQUIPMENT MFG CO LTD (CN)

H01M10/54

JP2016191143A	2016-11-10
JP2019026916A	2019-02-21
JP2016191143A	2016-11-10
JP2012229481A	2012-11-22

ARCO PATENT & TRADEMARK ATTORNEYS (JP)

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