METHOD FOR CONTROLLING FUEL CELL SYSTEM
First Claim
1. A method for controlling a fuel cell system,the fuel cell system includinga fuel cell that includes a solid polymer electrolyte membrane and that generates electric power by causing an electrochemical reaction between a fuel gas and an oxidant gas,a fuel gas supply device that supplies the fuel gas into the fuel cell,an oxidant gas supply device that supplies the oxidant gas into the fuel cell, andan impedance measuring unit that measures an impedance of the fuel cell,the method comprising:
- increasing an output electric current of the fuel cell to a required output electric current after continuing generation of electric power at a predetermined threshold electric current value when the impedance measured by the impedance measuring unit is higher than or equal to a predetermined threshold impedance value and the output electric current reaches the predetermined threshold electric current value in a process of increasing the output electric current to the required output electric current.
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Accused Products
Abstract
A method for controlling a fuel cell system including a fuel cell, includes measuring an impedance of the fuel cell that includes a solid polymer electrolyte membrane to generate electric power via an electrochemical reaction between a fuel gas and an oxidant gas. An output electric current output from the fuel cell is increased to a threshold electric current value when the impedance is equal to or higher than a threshold impedance value and a target electric current value is larger than the threshold electric current value. The output electric current is maintained at the threshold electric current value. The output electric current is increased from the threshold electric current value to the target electric current value.
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Citations
11 Claims
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1. A method for controlling a fuel cell system,
the fuel cell system including a fuel cell that includes a solid polymer electrolyte membrane and that generates electric power by causing an electrochemical reaction between a fuel gas and an oxidant gas, a fuel gas supply device that supplies the fuel gas into the fuel cell, an oxidant gas supply device that supplies the oxidant gas into the fuel cell, and an impedance measuring unit that measures an impedance of the fuel cell, the method comprising: increasing an output electric current of the fuel cell to a required output electric current after continuing generation of electric power at a predetermined threshold electric current value when the impedance measured by the impedance measuring unit is higher than or equal to a predetermined threshold impedance value and the output electric current reaches the predetermined threshold electric current value in a process of increasing the output electric current to the required output electric current. - View Dependent Claims (2, 3, 4, 5)
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6. A method for controlling a fuel cell system including a fuel cell, comprising:
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measuring an impedance of the fuel cell that includes a solid polymer electrolyte membrane to generate electric power via an electrochemical reaction between a fuel gas and an oxidant gas; increasing an output electric current output from the fuel cell to a threshold electric current value when the impedance is equal to or higher than a threshold impedance value and a target electric current value is larger than the threshold electric current value; maintaining the output electric current at the threshold electric current value; and increasing the output electric current from the threshold electric current value to the target electric current value. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification