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Flexible method for monitoring fuel cell voltage

United States Patent

September 24, 2002
View the Complete Patent at the US Patent & Trademark Office
A method for equalizing the measured voltage of each cluster in a fuel cell stack wherein at least one of the clusters has a different number of cells than the identical number of cells in the remaining clusters by creating a pseudo voltage for the different cell numbered cluster. The average cell voltage of the all of the cells in the fuel cell stack is calculated and multiplied by a constant equal to the difference in the number of cells in the identical cell clusters and the number of cells in the different numbered cell cluster. The resultant product is added to the actual voltage measured across the different numbered cell cluster to create a pseudo voltage which is equivalent in cell number to the number of cells in the other identical numbered cell clusters.
Mowery; Kenneth D. (Noblesville, IN), Ripley; Eugene V. (Russiaville, IN)
General Motors Corporation (Detroit, MI)
09/ 348,245
July 2, 1999
STATEMENT OF GOVERNMENT SUPPORT The Government of the United States of America has right in this invention pursuant to Agreement No. DE-AC02-90CH10435 awarded by the U.S. Department of Energy.