Abstract: A fuel cell system that can supply fuel gas appropriately is provided. The fuel cell system includes an injector 23A and an injector 23B which inject fuel gas, and an ECU 50. The ECU 50 adjusts the flow rate of the fuel gas that is injected from the injector 23A by adjusting the valve opening time period and the valve closing time period of the injector 23A, which are repeated alternately, and make at least a part of the valve opening time period of the injector 23B overlap with the valve closing time period of the injector 23A when opening the valve of the injector 23B.

Abstract: A method of shutting down a fuel cell system includes a first step of supplying hydrogen gas and air to a fuel cell stack to thereby cause the fuel cell stack to generate electricity, and a second step of stopping supply of the hydrogen gas, and then supplying air to the fuel cell stack so as to cause the fuel cell stack to generate electricity upon detection of a command to shut down the fuel cell stack. In the second step, when the pressure of the hydrogen gas is lowered to a preset lower-limit value based on an anode pressure, which actually is measured, the fuel cell stack is caused to stop generating electricity.

Abstract: A fuel cell system that can supply fuel gas appropriately is provided. The fuel cell system includes an injector 23A and an injector 23B which inject fuel gas, and an ECU 50. The ECU 50 adjusts the flow rate of the fuel gas that is injected from the injector 23A by adjusting the valve opening time period and the valve closing time period of the injector 23A, which are repeated alternately, and make at least a part of the valve opening time period of the injector 23B overlap with the valve closing time period of the injector 23A when opening the valve of the injector 23B.

Abstract: Disclosed is a fuel cell system which includes a fuel cell having an anode and a cathode and for producing electricity through reaction between the fuel gas and the oxidant gas, a fuel gas supply path through which the fuel gas passes, an oxidant gas supply path through which the oxidant gas passes, a voltage sensing device for detecting voltage produced by the fuel cell during power generation, and a decision device for determining whether or not cross leakage occurs between the anode and the cathode of the fuel cell, based on voltage information sent from the voltage sensing device. Moreover, the decision device determines that the cross leakage occurs between the anode and the cathode, if the voltage produced by the fuel cell is less than a predetermined value during the power generation.

Abstract: A method of shutting down a fuel cell system includes a first step of supplying hydrogen gas and air to a fuel cell stack to thereby cause the fuel cell stack to generate electricity, and a second step of stopping supply of the hydrogen gas, and then supplying air to the fuel cell stack so as to cause the fuel cell stack to generate electricity upon detection of a command to shut down the fuel cell stack. In the second step, when the pressure of the hydrogen gas is lowered to a preset lower-limit value based on an anode pressure, which actually is measured, the fuel cell stack is caused to stop generating electricity.

Abstract: Disclosed is a fuel cell system which includes a fuel cell having an anode and a cathode and for producing electricity through reaction between the fuel gas and the oxidant gas, a fuel gas supply path through which the fuel gas passes, an oxidant gas supply path through which the oxidant gas passes, a voltage sensing device for detecting voltage produced by the fuel cell during power generation, and a decision device for determining whether or not cross leakage occurs between the anode and the cathode of the fuel cell, based on voltage information sent from the voltage sensing device. Moreover, the decision device determines that the cross leakage occurs between the anode and the cathode, if the voltage produced by the fuel cell is less than a predetermined value during the power generation.