Electrochemical fuel cell stack with concurrently flowing coolant and oxidant streams
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United States of America Patent
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Aug 20, 1996
Issued Date -
N/A
app pub date -
Jun 24, 1994
filing date -
Jan 15, 1991
priority date (Note) -
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Abstract
A fuel cell assembly within an electrochemical fuel cell stack has a cooling jacket disposed adjacent the cathode layer. The cooling layer comprises a coolant stream inlet, a coolant stream outlet, and at least one channel for directing a coolant stream from the coolant stream inlet to the coolant stream outlet. The coolant stream channels extend such that the coolest region of the cooling layer substantially coincides with the region of the adjacent cathode layer having the highest concentration of oxygen (and also the lowest water content), and the warmest region of the cooling layer substantially coincides with the region of the adjacent cathode layer having the lowest concentration of oxygen (and also the highest water content).
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