System and method for monitoring the state of charge of a battery
US8154252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2009 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Dec 18, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/382
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process for monitoring the status of a battery. Steps of the process include measuring a battery current and comparing the battery current to a predetermined threshold. A battery status is determined as one of charging, discharging and quiescent. For a battery charging status determination, the charging state of charge of the battery is computed. For battery discharge status determination, the discharge current is compared to a predetermined threshold. Based upon the discharge current comparison, a basis for the discharge current is selected from one of a plurality of predetermined discharge conditions and the discharging state of charge of the battery is computed for the select discharge condition. For a quiescent status, the quiescent state of charge of the battery is computed. The computed state of charge of the battery is provided in a quantitative form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.