POWER CONVERSION CONTROLLING METHOD OF FUEL CELL-BATTERY HYBRID-ELECTRIC VEHICLE AND CONTROL DEVICE
First Claim
1. A method of controlling power allocation of a fuel cell-battery hybrid system, comprising:
- a reference value setting step of setting a mode switching output value, which is a reference for switching of power supply status and power allocation between a fuel cell and a battery, within a range below a maximum power value of a motor supplied with a constant voltage from the fuel cell and/or the battery;
a requested value extraction step of extracting an output value, requested by the motor, in real time during traveling;
an output value comparison step of comparing the mode switching output value with the requested output value extracted from the motor in real time;
a low-output switching step of, when the requested output value is less than the mode switching output value, operating a fuel cell converter, which supplies a constant voltage from the fuel cell to the motor, and stopping operation of a battery converter, which supplies a constant voltage from the battery to the motor; and
a high-output switching step of, when the requested output value is equal to or greater than the mode switching output value, simultaneously operating both the fuel cell converter and the battery converter in a predetermined output ratio.
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Abstract
The present invention relates to a method and apparatus for controlling power allocation of a fuel cell-battery hybrid system. A mode switching output value, which is a reference for switching of power supply status and power allocation, is set within a range below a maximum power value of a motor supplied with a constant voltage from the fuel cell and/or the battery. A requested output value is extracted in real time. The mode switching output value is compared with the requested output value. When the requested output value is less than the mode switching output value, a fuel cell converter is operated, and an operation of a battery converter is stopped. When the requested output value is equal to or greater than the mode switching output value, both the fuel cell converter and the battery converter are simultaneously operated in a predetermined output ratio.
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Citations
9 Claims
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1. A method of controlling power allocation of a fuel cell-battery hybrid system, comprising:
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a reference value setting step of setting a mode switching output value, which is a reference for switching of power supply status and power allocation between a fuel cell and a battery, within a range below a maximum power value of a motor supplied with a constant voltage from the fuel cell and/or the battery; a requested value extraction step of extracting an output value, requested by the motor, in real time during traveling; an output value comparison step of comparing the mode switching output value with the requested output value extracted from the motor in real time; a low-output switching step of, when the requested output value is less than the mode switching output value, operating a fuel cell converter, which supplies a constant voltage from the fuel cell to the motor, and stopping operation of a battery converter, which supplies a constant voltage from the battery to the motor; and a high-output switching step of, when the requested output value is equal to or greater than the mode switching output value, simultaneously operating both the fuel cell converter and the battery converter in a predetermined output ratio. - View Dependent Claims (2, 3, 4, 5, 6, 9)
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7. An apparatus for controlling power allocation of a fuel cell-battery hybrid system, comprising:
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a fuel cell electrically connected to a motor to supply power to the motor; a battery electrically connected to the motor to allow the motor to be selectively supplied with power from the fuel cell or from both the fuel cell and the battery; a fuel cell converter installed on a connection path between the fuel cell and the motor so as to adjust to a certain level power supplied from the fuel cell to the motor; a variable resistor disposed on a connection path between the fuel cell converter and the motor so as to adjust power supplied from an outside of the fuel cell converter to the motor; a battery converter installed on a connection path between the battery and the motor so that power supplied from the battery to the motor is adjusted to a certain level, and electrically connected to a connection path between the variable resistor and the motor so that the fuel cell and the battery can supply power to the motor in a predetermined output ratio; and a control unit for performing adjustment by disconnecting a connection path between the battery and the motor in the connection path between the fuel cell and the motor when the output value requested by the motor is less than a preset reference output value. - View Dependent Claims (8)
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Specification