Timed voltage clamp for battery charger
US4468605A · kind A · utility
25Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1982 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Apr 12, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/007182
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery charging device wherein the charging current level is controllable by a thermal circuit responsive to battery temperature also includes a circuit responsive to battery voltage and a timing circuit. The timing circuit is activated when a battery is inserted into the device for charging and immediately times a very brief interval. If the battery voltage exceeds a predetermined level during the timed interval, the charging current level is reduced as by the thermal circuit. The circuit protects both cold and charged batteries from damage due to overcharging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.