Method for diagnosing the operation of a device for cutting off and connecting a battery from/to the onboard power network of a motor vehicle
US8688317B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2010 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jul 7, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for diagnosing operating condition of a device for cutting off and connecting a high-voltage bipolar battery from/to a bipolar onboard power network of a motor vehicle. The device includes a first power relay between a first terminal of the battery and a first terminal of the network, a second power relay between a second terminal of the battery and a second terminal of the network, and a serial arrangement of a third precharge relay and a precharge resistor, connected in parallel to the first power relay. The method: measures two voltages of the cutoff/connection device; compares the measured voltages with predetermined voltage values representing faults of the cutoff/connection device; and diagnoses a fault of a relay used on the result of the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.