FUEL CELL OUTPUT CHARACTERISTIC ESTIMATION APPARATUS AND OUTPUT CHARACTERISTIC ESTIMATION METHOD, FUEL CELL SYSTEM AND VEHICLE HAVING THE SAME, AND FUEL CELL OUTPUT CONTROL METHOD AND DATA STORAGE MEDIUM
First Claim
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1. A fuel cell output characteristic estimating apparatus for estimating an output characteristic of a fuel cell whose output characteristic has undergone a change over time, comprising:
- a current-voltage detector that detects an output current of the fuel cell and a voltage between terminals of the fuel cell; and
a controller that estimates the output characteristic of the fuel cell after the output characteristic has undergone a change due to ageing degradation of the fuel cell over time on the basis of the detected output current and the detected voltage between the terminals, detected by the current-voltage detector, and a predetermined basic output characteristic of the fuel cell;
a basic output characteristic correction device that corrects the basic output characteristic of the fuel cell based on the detected output current and the detected output voltage of the fuel cell;
a power supply that supplies electric power to, and receives the electric power from, the fuel cell; and
a converter connected to terminals of the power supply and transforms the voltage between the terminals of the power supply so as to be applied to the terminals of the fuel cell.
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Abstract
An output characteristic of a fuel cell is estimated by detecting an output current of the fuel cell and a voltage between terminals of the fuel cell, and then estimating the output characteristic of the fuel cell on the basis of the detected output current and the detected voltage between the terminals, and a basic output characteristic of the fuel cell.
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Citations
16 Claims
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1. A fuel cell output characteristic estimating apparatus for estimating an output characteristic of a fuel cell whose output characteristic has undergone a change over time, comprising:
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a current-voltage detector that detects an output current of the fuel cell and a voltage between terminals of the fuel cell; and a controller that estimates the output characteristic of the fuel cell after the output characteristic has undergone a change due to ageing degradation of the fuel cell over time on the basis of the detected output current and the detected voltage between the terminals, detected by the current-voltage detector, and a predetermined basic output characteristic of the fuel cell; a basic output characteristic correction device that corrects the basic output characteristic of the fuel cell based on the detected output current and the detected output voltage of the fuel cell; a power supply that supplies electric power to, and receives the electric power from, the fuel cell; and a converter connected to terminals of the power supply and transforms the voltage between the terminals of the power supply so as to be applied to the terminals of the fuel cell. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A fuel cell system having a fuel cell whose output characteristic has undergone a change over time, the fuel cell system comprising:
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a fuel cell output characteristic estimating apparatus for estimating an output characteristic of the fuel cell after the output characteristic has undergone a change due to ageing degradation of the fuel cell over time, including a current-voltage detector that detects an output current of the fuel cell and a voltage between terminals of the fuel cell, and a controller that; estimates the output characteristic of the fuel cell after the output characteristic has undergone a change due to ageing degradation of the fuel cell over time on the basis of the detected output current and the detected voltage between the terminals, detected by the current-voltage detector, and a predetermined basic output characteristic of the fuel cell; sets a target output of the fuel cell using the output characteristic of the fuel cell estimated by the controller; and adjusts an output of the fuel cell such that the set target output is generated by the fuel cell; a basic output characteristic correction device that corrects the basic output characteristic of the fuel cell based on the detected output current and the detected output voltage of the fuel cell; a power supply that supplies electric power to, and receives the electric power from, the fuel cell system; wherein the controller sets the target output of the fuel cell on the basis of an output required to be generated by the fuel cell system, and when the set target output of the fuel cell is in excess of, or short of, the required output of the fuel cell system, the controller changes supply of the electric power to or from the power supply; and a converter connected to terminals of the power supply and transforms the voltage between the terminals of the power supply so as to be applied to the terminals of the fuel cell. - View Dependent Claims (9, 10, 11)
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12. A fuel cell output characteristic estimating apparatus for estimating a fuel cell output characteristic that changes over time comprising:
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A current-voltage detector that detects an output current and an output voltage of the fuel cell; and a controller that estimates the output characteristic of the fuel cell based on the detected output current, the detected voltage, and a basic output characteristic of the fuel cell, which changes over time, wherein the output characteristic of the fuel cell is estimated when it is determined that the basic output characteristic of the fuel cell has changed. - View Dependent Claims (13, 14, 15, 16)
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Specification