Battery pack voltage detection apparatus
US6803766B2 · kind B2 · utility
77Cited by
3References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Dec 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A battery cell voltages are read in parallel to a capacitor for each battery block of a battery pack by the use of analog switches. The stored voltages of the capacitors are A/D-converted sequentially through the analog switches. Thereby, each cell voltage is measured with suppression of measurement error by the use of the simple flying capacitor type circuit structure, while the circuit safety is secured by providing the current limitation resistor having a large resistance value between each cell and the analog switch. A noise reduction circuit having a pair of capacitors is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.