Detection of over-current shorts in a battery pack using pattern recognition
US8618775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2012 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Jan 12, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/907
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A controller identifies a condition of a hazardous internal short by comparing patterns of series element voltages to the last known balance condition of the series elements. If the loaded or resting voltage of one or more contiguous series elements uniformly drop from the previously known condition by an amount consistent with an over-current condition, an over-current internal short circuit fault is registered. The desired response is to prevent the affected series elements from heating to a hazardous temperature by summoning the maximum heat rejection capability of the system until the short ceases and the affected elements cool, the cooling function is no longer able to operate due to low voltage, or the affected series string has drained all of its energy through the short. Also includes are responses that allow the battery pack to continue to power the cooling system even though it may enter an over-discharged state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.