# US 12,603,337 B2 · Method of newly producing lithium-ion secondary battery using an electrode plate of a used lithium-ion secondary battery

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- Number: US 12,603,337 B2
- Document ID: US12603337B2
- Status: Granted
- Kind: B2
- Application number: 17/932,292
- Filed: 2022-09-15
- Published: 2023-04-27
- Granted: 2026-04-14
- Earliest claimed: 2021-10-26
- Assignees: Prime Planet Energy & Solutions, Inc.
- Applicants: Prime Planet Energy & Solutions, Inc.
- Inventors: Masahiro Yoshioka
- Web page: https://patentgrep.com/patent/US12603337B2

## CPC

- H01M 10/54: Reclaiming serviceable parts of waste accumulators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 50/609: Arrangements or processes for filling with liquid, e.g. electrolytes
- Y02E 60/10: Energy storage using batteries
- Y02W 30/84: Recycling of batteries or fuel cells
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

A method of newly producing a lithium-ion secondary battery using an electrode plate of a used lithium-ion secondary battery includes providing the electrode plate of the used lithium-ion secondary battery; cleansing the electrode plate by polar solvent; and drying the electrode plate thereafter to obtain a cleansed electrode plate. The method includes forming an electrode body and attaching the cleansed electrode plate to the electrode body; and securing the electrode body inside a battery case. The method includes injecting non-aqueous electrolytic solution between the battery case and the cleansed electrode plate. The non-aqueous electrolytic solution includes lithium salt containing element fluorine and a pH level of which is in a range of 6 to 8. The method includes contacting the non-aqueous electrolytic solution with a basic lithium compound to form a pH-level-adjusted non-aqueous electrolytic solution. The method includes injecting the pH-level-adjusted non-aqueous electrolytic solution in the battery case.

## Claims

### Claim 1

A method of newly producing a lithium-ion secondary battery by using an electrode plate of a used lithium-ion secondary battery, the method comprising:
providing the electrode plate of the used lithium-ion secondary battery;
cleansing the electrode plate having been taken out of the used lithium-ion secondary battery by polar solvent;
drying the electrode plate thereafter to obtain a cleansed electrode plate;
forming an electrode body and attaching the cleansed electrode plate to the electrode body;
providing a battery case;
securing the electrode body inside the battery case;
injecting non-aqueous electrolytic solution in a space between the battery case and the cleansed electrode plate inside the battery case, wherein the non-aqueous electrolytic solution comprises lithium salt containing element fluorine and a pH level of which is in a range of 6 to 8 inclusive, wherein
the method includes non-aqueous electrolytic solution adjusting of bringing the non-aqueous electrolytic solution including lithium salt containing element fluorine into contact with a basic lithium compound to adjust a pH level in a range of 6 to 8 inclusive to form a pH-level-adjusted non-aqueous electrolytic solution; and
injecting the pH-level-adjusted non-aqueous electrolytic solution in the battery case.