Power-down control method of fuel cell hybrid electric vehicle
US7835831B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2007 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Jul 25, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/40
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A power-down control method of a fuel cell hybrid vehicle includes determining an operation mode when a key-off command is input. If the mode is a fuel cell mode, the method includes: converting a low voltage DC-DC converter connected to an auxiliary battery to a boost mode; maintaining a driving state of a high voltage part, powered by voltage from the auxiliary battery and boosted by the low voltage DC-DC converter; subsequently stopping operation of a fuel cell stack and turning off the high voltage part; and subsequently turning off the low voltage DC-DC converter. If the mode is a hybrid mode, the method includes: maintaining a driving state of the high voltage part, powered by voltage from a super capacitor; subsequently stopping operation of the fuel cell stack and turning off the high voltage part; subsequently turning off the DC-DC converters; and subsequently cutting power of the super capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.