Fuel cell system, controller thereof and method
AssigneeNissan Motor Co., Ltd.
InventorNaoto Kashiwagi
Life of this patent
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Abstract
A fuel cell system 10 has a fuel cell 16 and a battery 24. An external load 30 is supplied with output power produced by the fuel cell and output power discharged from the battery. The fuel cell system includes a battery charge level monitoring unit 26 which monitors and detects a battery charge level, an accelerator' displacement sensor 32 which detects an accelerator's displacement value and a control unit 11 which calculates demand power to be produced by the fuel cell and varying rate of the displacement value. The control unit corrects the demand power by using a control map having a power correction pattern that is in response to a varying rate of the displacement value and the charge level of the battery.
Claims20
A fuel cell system comprising:
- a fuel cell producing output power;
- a battery discharging output power;
- a battery charge level monitoring unit monitoring and detecting a charge level of the battery;
- an accelerator's displacement sensor detecting an accelerator's displacement value;
- and
- a controller calculating demand power to be produced by the fuel cell based on the accelerator's displacement value detected by the accelerator's displacement sensor, calculating an accelerator's displacement value per unit time based on the accelerator's displacement value, and correcting the demand power based on the accelerator's displacement value per unit time and the charge level of the battery detected by the battery charge level monitoring unit.
A controller of a fuel cell system provided with a fuel cell producing output power and a battery discharging output power, the controller comprising:
- means for monitoring and detecting a charge level of the battery;
- means for detecting an accelerator's displacement value;
- means for calculating demand power to be produced by the fuel cell based on the accelerator's displacement value;
- means for calculating an accelerator's displacement value per unit time based on the accelerator's displacement value;
- and
- means for correcting the demand power based on the accelerator's displacement value per unit time and the charge level of the battery.
A method of controlling a fuel cell system provided with a fuel cell producing output power and a battery discharging output power, the method comprising:
- monitoring and detecting a charge level of the battery;
- detecting an accelerator's displacement value;
- calculating demand power to be produced by the fuel cell based on the accelerator's displacement value;
- calculating an accelerator's displacement value per unit time based on the accelerator's displacement value;
- and
- correcting the demand power based on the accelerator's displacement value per unit time and the charge level of the battery.
Dependencies are inferred from the claim text.