Protection device for assembled battery and assembled battery system containing the same
US8207703B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2009 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Aug 13, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protection device for an assembled battery includes a sampling capacitor, first switches and second switches to sample the voltages of the battery cells and hold the voltages in the capacitor, a detection unit which detects the voltages of the battery cells based on the voltage sampled by any one of the first switches and the second switches and held on the capacitor and output the detected value, a computing unit which computes an average value of the detected values, a comparator which compares the detected value with the average value so as to obtain a result of comparison indicating a relation in size between the both, and a controller which controls the first switches and the second switches, for the second switches to sample if the detected value obtained by sampling by the first switches is higher than the average value according to the comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.