Flow field plate for use in fuel cells
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United States of America Patent
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Apr 28, 2009
Grant Date -
Dec 8, 2005
app pub date -
Jun 7, 2004
filing date -
Jun 7, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of flowing reactants over an ion exchange membrane in a fuel cell flow field plate is provided. The flow field plate is provided, comprising a network of flow channels in the plate bounded by an electrochemically active electrode, the network comprising a series of passages having parallel grooves, the passages being interconnected by a header providing a substantially even redistribution of fluid flow received from grooves of one passage to grooves of the next passage. A reactant fluid is supplied to create a flow across the network to achieve a desired reactant utilization, wherein a flow rate and a concentration of reactant molecules per active area of membrane in the grooves increase by less than 80% across the header.
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