Method and system for battery state of charge estimation by using measured changes in voltage
US7098666B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2004 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Jul 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3648
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method (20 or 30) and system (40) for estimating a battery state of charge can include a memory (48) for storing at least one among an impedance value, a plurality of values for V drop 0-1, or a plurality of values for V drop 0-1 normalized for charge or discharge values providing a stored plurality of values. The system can include a processor (44) and can measure at least one among V drop C-0 providing a measured V drop C-0 value and V drop 0-1 for the providing a measured V drop 0-1 value. The processor can be programmed to perform the functions of dividing the V drop C-0 value by the impedance value to estimate a charging current at the battery or comparing the measured V drop 0-1 value with a value among the stored plurality of values to estimate the battery state of charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.