Fuel cell stack with multiple groups of cells and flow passes
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United States of America Patent
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Jan 20, 2009
Grant Date -
Jun 15, 2006
app pub date -
Dec 13, 2004
filing date -
Dec 13, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is described a method of flowing reactants through a fuel cell stack having a plurality of fuel cells, the method comprising: dividing the stack into a plurality of groups, each of the groups connected together electrically in series; selecting a number of the groups and a number of cells in each of the groups to maintain a substantially constant stoichiometry for each of the groups, wherein a number of the fuel cells in each of said groups is decreasing from upstream to downstream; and distributing the reactants in series to each of the groups and in parallel within each of the groups.
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