Protective device and protective system for battery assembly which detects discontinuities through voltage monitoring
US9837837B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2013 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Sep 28, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protective device and a protective system for a battery assembly are provided. The battery assembly comprises N cells, and the protective device includes: a constant current source module comprising M (1<M≦N) first constant current sources connected in parallel with M cells in the N cells respectively, and configured to generate an output current according to a voltage of the connected cell; a voltage sampling module including N voltage sampling units connected in parallel with the N cells respectively and configured to output a sampling voltage; a determining module connected with the voltage sampling module and configured to generate a first disconnection signal when the sampling voltage output from any voltage sampling unit reaches a predetermined value; and a protective control module, connected with the determining module and configured to control the battery assembly to turn off according to the first disconnection signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.