Battery system, battery monitoring method and apparatus
US7173397B2 · kind B2 · utility
26Cited by
3References
12Claims
0Family size
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Key dates
| Filing date | Feb 25, 2004 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Jul 7, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery performance monitoring system anticipates the sudden fall of battery output. The system measures the battery voltage at a time point when the discharge current of a battery becomes smaller than the reference current value or at a time point when the current to the load which is connected to the battery becomes smaller than the reference current value, and judges the battery to be abnormal if the difference of the measured battery voltage from the approximate formula in regard to the current-voltage relation in the former half of a same discharge event becomes out of the reference range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.