Circuit and method for battery leakage detection
US9630520B2 · kind B2 · utility
1Cited by
10References
20Claims
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Key dates
| Filing date | Jan 13, 2015 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Jan 13, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A battery management system includes a switching element configured to selectively couple a resistive network in parallel with a capacitor that couples a voltage bus and a ground reference. A controller is programmed to, in response to activating the switching element for a predetermined time, output a diagnostic according to a leakage resistance that is based on a time associated with a predetermined change in a voltage across the capacitor. A time constant is derived from the voltage response and the leakage resistance is derived from the time constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.