| 摘要 |
An object of the present invention is to provide a fuel cell system which can control the moisture state inside the fuel cell so as to be in an optimal state that can provide high power output and prevent the occurrence of a dry-up. The first fuel cell system comprises a fuel cell and is operated under a non-humidified condition, the fuel cell comprising: a polymer electrolyte membrane sandwiched between an anode electrode and a cathode electrode, a fuel gas channel disposed so as to face the anode electrode in order to supply the anode electrode with fuel gas containing at least a fuel component, and an oxidant gas channel disposed so as to face the cathode electrode in order to supply the cathode electrode with oxidant gas containing at least an oxidant component, wherein a flow direction of the fuel gas in the fuel gas channel and a flow direction of the oxidant gas in the oxidant gas channel are opposite; and wherein the fuel cell system has a water vapor amount control means which controls a water vapor amount at an outlet of the fuel gas channel based on a target value of the water vapor amount which is preliminarily set based on a relationship between a voltage of the fuel cell and the water vapor amount. The second fuel cell system comprises a fuel cell and is operated under a non-humidified condition, the fuel cell comprising: a polymer electrolyte membrane sandwiched between an anode electrode and a cathode electrode, a fuel gas channel disposed so as to face the anode electrode in order to supply the anode electrode with fuel gas, and an oxidant gas channel disposed so as to face the cathode electrode in order to supply the cathode electrode with oxidant gas, wherein a flow direction of the fuel gas in the fuel gas channel and a flow direction of the oxidant gas in the oxidant gas channel are opposite; and wherein the fuel cell system has an average flow rate control means which controls an average flow rate of the fuel gas in the fuel gas channel based on a target value of the average flow rate which is preliminarily set based on a relationship between a voltage of the fuel cell and then average flow rate. |
