Fuel cell system shutdown with anode pressure control

Details Fuel cell system shutdown with anode pressure control Fuel cell system shutdown with anode pressure control

H - Electricity

01

M

H01M 8/04 (2006.01) G01L 13/00 (2006.01)

Patent

CA 2327608

A venting methodology and pressure sensing and vent valuing arrangement for monitoring anode bypass valve operating during the normal shutdown of a fuel cell apparatus of the type used in vehicle propulsion systems. During a normal shutdown routine, the pressure differential between the anode inlet and anode outlet is monitored in real time in a period corresponding to the normal closing speed of the anode bypass valve and the pressure differential at the end of the closing cycle of the anode bypass valve is compared to the pressure differential at the beginning of the closing cycle. If the difference in pressure differential at the beginning and end of the anode bypass closing cycle indicates that the anode bypass valve has not properly closed, a system controller switches from a normal shutdown mode to a rapid shutdown mode in which the anode inlet is instantaneously vented by rapid vents.

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