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Fuel cell stack monitoring and system control

United States Patent

February 17, 2004
View the Complete Patent at the US Patent & Trademark Office
A control method for monitoring a fuel cell stack in a fuel cell system in which the actual voltage and actual current from the fuel cell stack are monitored. A preestablished relationship between voltage and current over the operating range of the fuel cell is established. A variance value between the actual measured voltage and the expected voltage magnitude for a given actual measured current is calculated and compared with a predetermined allowable variance. An output is generated if the calculated variance value exceeds the predetermined variance. The predetermined voltage-current for the fuel cell is symbolized as a polarization curve at given operating conditions of the fuel cell.
Keskula; Donald H. (Webster, NY), Doan; Tien M. (Columbia, MD), Clingerman; Bruce J. (Palmyra, NY)
General Motors Corporation (Detroit, MI)
10/ 011,097
December 6, 2001
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.