Method of rapidly charging a lithium ion cell
US5481174A · kind A · utility
39Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1993 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Dec 27, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00711
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery charger for lithium ion cells closely monitors cell voltage, and charge time, so as to avoid the over-application of charge to the cell. Charge pulses (104) are followed by a first rest (110), a discharge (112) and a second rest, (120) period prior to re-initiating the charge pulse. If the battery voltage reaches a preselected maximum, in less than a pre-selected period of time, the charge pulse is reduced by a preselected minimum factor. Cycling of the cell is continued until the cells are fully charged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.