Transitioning an electrochemical cell stack between a power producing mode and a pumping mode
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United States of America Patent
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Issued Date -
Nov 11, 2010
app pub date -
Nov 13, 2007
filing date -
Nov 13, 2007
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Abandoned
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Abstract
A technique includes operating an electrochemical cell stack in a power producing mode, including communicating a fuel flow in an anode chamber of the stack and communicating an oxidant flow in a cathode chamber of the stack. The technique includes halting the oxidant flow and monitoring a voltage of the stack while the oxidant flow is halted, and in response to the voltage decreasing below a predefined threshold, transitioning the stack into an electrochemical cell pumping mode.
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