Method for charging secondary battery
US11271257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2019 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Feb 17, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2300/0068
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a method for charging a secondary battery configured to both suppress battery short circuits and to reduce battery charging time. The charging method is a multistep secondary battery charging method comprising first charging in which a secondary battery is charged at a first current density I1, and second charging in which the secondary battery is charged at a second current density I2 which is larger than the first current density I1, wherein, when a roughness height of an anode current collecting foil-side surface of a solid electrolyte layer is determined as Y (μm) and a thickness of a roughness coating layer is determined as X (μm), in the first charging, the secondary battery is charged at the first current density I1 until X/Y reaches 0.5 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.