COUNTER-FREEZE CONTROL METHOD FOR FUEL CELL SYSTEM

A fuel cell system includes: a fuel cell having an anode and a cathode; an oxidant gas flowpath supplying the oxidant gas to the fuel cell and discharging the oxidant gas from the fuel cell; a first shut-off valve disposed upstream from the fuel cell and having a first valve body; a second shut-off...

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Bibliographische Detailangaben
Hauptverfasser:	TAKAGI NARIHIRO, KASUYA KURI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	A fuel cell system includes: a fuel cell having an anode and a cathode; an oxidant gas flowpath supplying the oxidant gas to the fuel cell and discharging the oxidant gas from the fuel cell; a first shut-off valve disposed upstream from the fuel cell and having a first valve body; a second shut-off valve disposed downstream from the fuel cell and having a second valve body; a cathode control unit for sealing the cathode; and a scavenging unit for scavenging the anode by supplying the oxidant gas to the anode, wherein the cathode control unit, before scavenging the anode by using the scavenging unit, unseals the cathode by opening the first shut-off valve and the second shut-off valve. The fuel cell system is capable of preventing the valve bodies pressed against seat sections from being frozen even below the freezing temperature, and capable of avoiding a situation unable to restart a turned-off state of the fuel cell system.