Method and apparatus for detecting a battery voltage
US7911182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2005 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | May 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/374
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
One aspect of the invention involves: maintaining a record of how long a circuit operates in each of a plurality of different operating modes thereof, starting from a point in time at which a battery that powers the circuit is replaced; calculating for each of the operating modes as a function of the record a cumulative current drain from the point in time to a current time; and determining as a function of the cumulative current drains whether the battery is subject to a low voltage condition. Another aspect involves: monitoring a voltage of a battery; periodically determining whether the voltage of the battery is subject to a low voltage condition; and maintaining a count of the number of times that the determining results in a determination that the battery is subject to a low voltage condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.