Transitioning an electrochemical cell stack between a power producing mode and a pumping mode

Transitioning an electrochemical cell stack between a power producing mode and a pumping mode

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 o...

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Bibliographische Detailangaben
Hauptverfasser: MADDALONI RICHARD, BROWN CHRIS, QI ZHIGANG, BENSON GLEN, SCHRIEBER JEFFREY W, WINKELMAN JAMES, CHUAH, P.E. CHRISTOPHER J
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Zusammenfassung: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.