Power-down control method of fuel cell hybrid electric vehicle

Details Power-down control method of fuel cell hybrid electric vehicle Power-down control method of fuel cell hybrid electric vehicle

2007-11-14

2010-11-16

Black, Thomas G (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Electric vehicle

C307S009100, C307S010100, C307S010600, C180S065210, C180S065240

Reexamination Certificate

active

07835831

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.

REFERENCES:
patent: 7058487 (2006-06-01), Hara et al.
patent: 7279855 (2007-10-01), Tahara et al.
patent: 7605552 (2009-10-01), Kawakami et al.
patent: 02-174502 (1990-07-01), None
patent: 2003-151600 (2003-05-01), None
patent: 2004-139950 (2004-05-01), None
patent: 2004-253220 (2004-09-01), None

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