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 method of estimating an output characteristic of a fuel cell whose output characteristic has undergone a change over time, comprising the step of:
- estimating the output characteristic of the fuel cell after the output characteristic of the fuel cell has undergone a change over time, on the basis of a detected output current of the fuel cell, a detected voltage between terminals of the fuel cell, a predetermined basic output characteristic of the fuel cell which is calculated from a preliminarily stored theoretical output characteristic, a basic internal resistance and a deviation of the detected voltage between terminals of the fuel cell from a voltage based on the basic output characteristic.
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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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14 Claims
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1. A method of estimating an output characteristic of a fuel cell whose output characteristic has undergone a change over time, comprising the step of:
estimating the output characteristic of the fuel cell after the output characteristic of the fuel cell has undergone a change over time, on the basis of a detected output current of the fuel cell, a detected voltage between terminals of the fuel cell, a predetermined basic output characteristic of the fuel cell which is calculated from a preliminarily stored theoretical output characteristic, a basic internal resistance and a deviation of the detected voltage between terminals of the fuel cell from a voltage based on the basic output characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling an output of a fuel cell whose output characteristic has undergone a change over time, comprising the steps of:
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(a) estimating a basic output characteristic of the fuel cell on the basis of at least one of a fuel supply pressure applied to the fuel cell and a temperature of the fuel cell; (b) estimating the output characteristic of the fuel cell after the output characteristic of the fuel cell has undergone a change over time, on the basis of the estimated basic output characteristic of the fuel cell which is calculated from a preliminarily stored theoretical output characteristic, a basic internal resistance, a detected output current of the fuel cell, a detected voltage between terminals of the fuel cell, and a deviation of the detected voltage between terminals of the fuel cell from a voltage based on the basic output characteristic; (c) setting a target output using the estimated output characteristic of the fuel cell whose output has undergone a change over time; and (d) controlling an output of the fuel cell such that the fuel cell whose output has undergone a change over time generates the set target output. - View Dependent Claims (10, 11, 12, 13, 14)
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