Charging method for nonaqueous electrolyte secondary cell and charging system for nonaqueous electrolyte secondary cell
US11448702B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2019 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Sep 17, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for charging a nonaqueous electrolyte secondary battery includes a first charging step of charging a first capacity Q1st at a first constant current value I1st, the first capacity Q1st including a capacity range in which dQSi/dQ is more than or equal to a predetermined threshold value, a second charging step of charging a second capacity at a second constant current value more than the first constant current value, a detection step of acquiring at least one of dV/dQ and dQSi/dQ, and a changing step of changing at least one of the timing of switching between the first charging step and the second charging step and the first constant current value I1st on the basis of a change in time of dV/dQ or dQSi/dQ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.