Battery monitoring unit having a sense FET circuit arrangement
US5977751A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Feb 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0029
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery monitoring unit is provided with a semiconductor power switch, which is looped into the battery lead and can serve for interrupting the battery current in a controlled manner. The battery monitoring unit comprises a sense FET circuit arrangement, which determines the battery current bidirectionally and the power FET part of which forms the semiconductor power switch, which is looped into the battery lead. Aside from the controllable interruption of battery current, a bidirectional determination of battery current and, with that, a continuous monitoring of the charge state of the battery is possible with this circuit arrangement, and can be used for monitoring vehicle batteries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.