US 12,365,596 B2
System for and method of processing waste lithium-ion battery
Fuminori Ando, Kobe (JP); Hiroaki Osawa, Kobe (JP); Shoji Takada, Kobe (JP); Chie Nakajima, Kobe (JP); Mariko Yamashita, Kobe (JP); Masahiro Sugata, Kobe (JP); Koji Fukumoto, Kobe (JP); Masaki Tsuzawa, Kobe (JP); and Ryosuke Nagai, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Appl. No. 17/616,096
Filed by KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
PCT Filed Feb. 26, 2020, PCT No. PCT/JP2020/007573
§ 371(c)(1), (2) Date Dec. 2, 2021,
PCT Pub. No. WO2020/246079, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 2019-106818 (JP), filed on Jun. 7, 2019.
Prior Publication US 2022/0315437 A1, Oct. 6, 2022
Int. Cl. B09B 3/80 (2022.01); B09B 3/70 (2022.01); C01D 15/08 (2006.01); C22B 3/06 (2006.01); C22B 3/22 (2006.01); C22B 3/44 (2006.01); C22B 26/12 (2006.01); H01M 10/54 (2006.01); B09B 101/16 (2022.01)
CPC C01D 15/08 (2013.01) [B09B 3/70 (2022.01); B09B 3/80 (2022.01); C22B 3/06 (2013.01); C22B 3/22 (2013.01); C22B 3/44 (2013.01); C22B 26/12 (2013.01); H01M 10/54 (2013.01); B09B 2101/16 (2022.01)] 4 Claims
OG exemplary drawing
 
1. A system for processing a waste lithium-ion battery, the system comprising:
a first aqueous solution generator that includes a first elution tank storing water, and that immerses an active material taken out from the waste lithium-ion battery in the water in the first elution tank and subjects the active material to carbon dioxide bubbling in the first elution tank to generate an aqueous solution of pH 5.5 to 8.5, in which lithium contained in the active material is eluted;
a first solid-liquid separator that removes a solid component from the aqueous solution generated by the first aqueous solution generator;
a first crystallizer that causes lithium carbonate to be deposited from the aqueous solution, from which the solid component has been removed by the first solid-liquid separator;
a second solid-liquid separator that performs solid-liquid separation on slurry containing the lithium carbonate deposited in the first crystallizer to take out the lithium carbonate;
a second aqueous solution generator that generates an aqueous solution of lithium carbonate by introducing the lithium carbonate taken out by the second solid-liquid separator into a second elution tank;
a third solid-liquid separator that removes a solid component from the aqueous solution generated by the second aqueous solution generator;
a second crystallizer that causes lithium carbonate to be deposited from the aqueous solution, from which the solid component has been removed by the third solid-liquid separator; and
a fourth solid-liquid separator that performs solid-liquid separation on slurry containing the lithium carbonate deposited in the second crystallizer to take out the lithium carbonate, wherein
the second aqueous solution generator generates the aqueous solution of lithium carbonate without performing carbon dioxide bubbling.