Method and circuitry to determine temperature and/or state of health of a battery/cell
US9063018B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2012 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Aug 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2217/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques and circuitry, in one embodiment, determine a temperature of a battery by applying a calibration packet to the battery's terminals and at the battery's first SOC, wherein the calibration packet includes a first pulse (charge or discharge) which temporally precedes a rest period. In one embodiment, measurement circuitry measures a first terminal voltage at a time immediately prior to or at a beginning of the first pulse of the calibration packet, and a second terminal voltage, in response to the calibration packet, at a time during the partial relaxation time period of a battery. Control circuitry determines a partial relaxation time voltage (VPRT) at the battery's first SOC using the first and second terminal voltages and determines a temperature of the battery by correlating the VPRT at the first SOC to a temperature of the battery at the battery's current SOH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.