Rechargeable battery charging method
US5442274A · kind A · utility
280Cited by
7References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 26, 1993 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Aug 26, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hysteresis battery charging method repeats peak and trough voltage and current waveforms taking the battery to a temporary over-voltage state during peak charging. This method achieves rapid recharge while avoiding battery performance degradation. Constant current charging or quasi-constant current charging is performed during peak charging. During troughs, charging is either suspended or reduced from that during peak charging. After battery capacity has reached a set value by hysteresis charging, an optimum voltage is maintained by constant voltage charging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.