Temperature-based vehicle wakeup strategy to initiate fuel...

Details Temperature-based vehicle wakeup strategy to initiate fuel... Temperature-based vehicle wakeup strategy to initiate fuel...

2005-08-09

2008-05-06

Maples, John S. (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

C429S006000

Reexamination Certificate

active

07368193

ABSTRACT:
A method of removing moisture from a fuel cell stack. The presence of liquid water in a fuel cell stack is especially undesirable should the temperature drop below freezing since the structures within the fuel cell are subject to degradation. One method includes measuring the temperature in the vicinity of a fuel cell vehicle when the fuel cell vehicle has been shut down and measuring the time elapsed since fuel cell vehicle shut off, and then flowing a moisture-removing medium through the fuel cell when the ambient temperature drops to a predetermined temperature and a time delay condition is satisfied. The moisture-removing medium is flowed through the fuel cell for a sufficient time to remove a sufficient amount of the water to inhibit degradation by freezing of water. A system which implements the method of the present invention is also provided.

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