Battery dropout correction for battery monitoring in mobile unit
US6046574A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 4, 1999 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Jun 4, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mobile electronic device can operate in multiple modes, each at a respective current load. Monitoring a battery in such a mobile device includes acquiring a sensed battery voltage during a particular operating mode and converting the sensed battery voltage to a scaled voltage for a known battery discharge curve having a well-defined turn-off voltage. The known battery discharge curve is preferably one for a full current load. The scaled voltage is then compared with the well-defined turn-off voltage to determine the amount of energy remaining in the battery. Operating times for other operating modes can also be calculated and displayed for the user's information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.