Charging method for non-aqueous electrolyte secondary battery by repeating a set of constant current charge and constant voltage charge and battery pack implementing the charging method
US8912762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2010 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Mar 17, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In the present method, a non-aqueous electrolyte secondary battery is charged by repeating n+1 times a constant current charge and a subsequent constant voltage charge, where n is an integer of 1 or more. (1) An nth charge comprises charging the secondary battery at a current Ic(n) to a voltage Ec(n), and subsequently charging the secondary battery at the voltage Ec(n) until the current decreases from Ic(n) to Ic(n+1). (2) An (n+1)th charge comprises charging the secondary battery at the current Ic(n+1) to a voltage Ec(n+1), and subsequently charging the secondary battery at the voltage Ec(n+1) until the current decreases from Ic(n+1) to Ic(n+2). Consequently, the charge time of the non-aqueous electrolyte secondary battery can be shortened while deterioration of the battery can be suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.