Battery charger charging time control
US5747970A · kind A · utility
12Cited by
15References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Sep 24, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit (103) for charging a battery (101) is connected to an input (126) for inputting a signal indicative of a temperature of the battery. A switch (108) selectively supplies power to the battery under the control of a control signal. A microcontroller (140) calculates a rate of change of the temperature signal and stores a peak rate of change during a battery charging interval. The microcontroller is operable to control the switch to disable charging of the battery when the temperature rate of change drops below the peak value by a rate of change threshold amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.