Power supply control device and method of detecting abnormality of relay
US7964985B2 · kind B2 · utility
10Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2007 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Feb 21, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
When an ignition key is turn ON, an ECU drives a bidirectional DC/DC converter to charge a capacitor to a voltage Vth1. The ECU turns on a first relay only and diagnoses whether or not a second relay, which is off, is welded, based on a change in a voltage VL at that time. After the diagnosis on welding, the ECU turns on the second relay, and the capacitor is charged to a voltage level of a main power storage device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.