System for and method of processing waste lithium-ion battery
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsFuminori ANDO, Hiroaki OSAWA, Chie NAKAJIMA, Mariko YAMASHITA, Masahiro SUGATA, Koji FUKUMOTO, Masaki TSUZAWA, Ryosuke NAGAI
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Abstract
A system for and a method of processing a waste lithium-ion battery make it possible to improve heat treatment efficiency and to heat-treat a large-sized waste lithium-ion battery without disassembling the battery. One example of the system for processing a waste lithium-ion battery includes a heater that heat-treats a waste lithium-ion battery at a heating temperature of lower than 400° C. to decompose and remove an electrolyte solution from the waste lithium-ion battery.
Claims12
A system for processing a waste lithium-ion battery, the system comprising a heater that heat-treats a waste lithium-ion battery at a heating temperature of lower than 400° C. to decompose and remove an electrolyte solution from the waste lithium-ion battery.
A method of processing a waste lithium-ion battery, the method comprising:
- a heating step of heat-treating a waste lithium-ion battery at a heating temperature of lower than 400° C. to decompose and remove an electrolyte solution from the waste lithium-ion battery;
- a crushing step of crushing the waste lithium-ion battery that has been heat-treated in the heating step;
- and
- a roasting step of heat-treating the waste lithium-ion battery that has been crushed in the crushing step at a heating temperature that is higher than or equal to 400° C. and lower than 660° C. in a reducing atmosphere or a low-oxygen atmosphere.
A method of processing a waste lithium-ion battery, the method comprising:
- a heating step of heat-treating a waste lithium-ion battery at a heating temperature of lower than 400° C. to decompose and remove an electrolyte solution from the waste lithium-ion battery;
- a crushing step of crushing the waste lithium-ion battery that has been heat-treated in the heating step;
- a classifying step of sorting out a cathode active material by separating the cathode active material from a cathode current collector of the waste lithium-ion battery that has been crushed in the crushing step;
- and
- a roasting step of heat-treating the cathode active material that has been sorted out in the classifying step at a heating temperature of higher than or equal to 500° C. in a reducing atmosphere or a low-oxygen atmosphere.
A method of processing a waste lithium-ion battery, the method comprising:
- a heating step of heat-treating a waste lithium-ion battery at a heating temperature of lower than 400° C. to decompose and remove an electrolyte solution from the waste lithium-ion battery;
- a crushing and classifying step of sorting out a cathode active material by separating the cathode active material from a cathode current collector of the waste lithium-ion battery that has been heat-treated in the heating step, while crushing the waste lithium-ion battery;
- and
- a roasting step of heat-treating the cathode active material that has been sorted out in the crushing and classifying step at a heating temperature of higher than or equal to 500° C. in a reducing atmosphere or a low-oxygen atmosphere.
Dependencies are inferred from the claim text.