Battery open-circuit voltage measurement using reverse current pulse
US9676288B2 · kind B2 · utility
2Cited by
9References
19Claims
0Family size
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Key dates
| Filing date | Mar 20, 2015 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Sep 2, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A battery management system for a vehicle includes a controller programmed to apply a current pulse to reverse a current flow through a battery to reduce or remove cell polarization. After the current pulse, an open-circuit voltage is measured as the terminal voltage of the battery. The settling time for the terminal voltage to approach the open-circuit voltage is reduced after the current pulse. The magnitude of the current pulse is based on a battery state of charge, a battery temperature, and a current magnitude prior to the current pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.