Shutdown procedure to improve startup at sub-freezing...

Details Shutdown procedure to improve startup at sub-freezing... Shutdown procedure to improve startup at sub-freezing...

2005-03-08

2005-03-08

Alejandro, Raymond (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

C429S006000, C429S006000, C429S006000

Reexamination Certificate

active

06864000

ABSTRACT:
A method for shutting down a fuel cell system including a plurality of fuel cells arranged in a stack, includes cooling the fuel cells to a shutdown temperature while maintaining a substantially uniform water vapor pressure through the fuel cells whereby migration of water within the fuel cells during cooling is reduced.

REFERENCES:
patent: 4040435 (1977-08-01), Elzinga
patent: 4965143 (1990-10-01), Mizuno et al.
patent: 5149599 (1992-09-01), Kamoshita
patent: 5154986 (1992-10-01), Takechi et al.
patent: 6120925 (2000-09-01), Kawatsu et al.
patent: 20020009623 (2002-01-01), St. Pierre et al.

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