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Fuel cell system logic for differentiating between rapid and normal shutdown commands

United States Patent

6,159,626
December 12, 2000
View the Complete Patent at the US Patent & Trademark Office
A method of controlling the operation of a fuel cell system wherein each shutdown command for the system is subjected to decision logic which determines whether the command should be a normal shutdown command or rapid shutdown command. If the logic determines that the shutdown command should be a normal shutdown command, then the system is shutdown in a normal step-by-step process in which the hydrogen stream is consumed within the system. If the logic determines that the shutdown command should be a rapid shutdown command, the hydrogen stream is removed from the system either by dumping to atmosphere or routing to storage.
Keskula; Donald H. (Webster, NY), Doan; Tien M. (Columbia, MD), Clingerman; Bruce J. (Palmyra, NY)
General Motors Corporation (Detroit, MI)
09/ 345,139
July 6, 1999
STATEMENT OF GOVERNMENT SUPPORT The Government of the United States of America has rights in this invention pursuant to Agreement No. DE-AC02-90CH10435 awarded by the U.S. Department of Energy.