Battery health assessment estimator
US8116998B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2009 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Mar 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3842
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A battery state of health estimator and similar method, system and computer product is disclosed providing for a estimate of a state of health (SOH) of one or more batteries, comprising, estimating a sampling of internal resistances of the one or more batteries, generating a time history of the internal resistance over a predetermined amount of time, generating a cumulative internal resistance histogram from the time history, calculating a final estimate of internal resistance of one or more batteries which represents the calculated SOH of one or more batteries and comparing the calculated SOH to a predetermined critical resistance threshold. If the calculated SOH is less than the predetermined critical resistance threshold, the battery is in no worse than a “Blue Monday” condition, and if the calculated SOH is greater than the critical resistance threshold, then the one or more batteries has failed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.