Method of utilizing power transistor of fuel cell stack diagnostic system
First Claim
1. An apparatus comprising:
- a fuel cell stack;
a fuel cell stack diagnostic system including;
a diagnosis control analyzer that diagnoses and analyzes a status of the fuel cell stack by measuring a current and a voltage of the fuel cell stack;
an alternating current (AC) signal generator that generates a diagnostic AC signal in accordance with control of the diagnosis control analyzer; and
a power transistor that is driven in response to the diagnostic AC signal outputted from the AC signal generator and includes a diagnostic AC component into the current of the fuel cell stack;
a regenerative braking detector configured to detect regenerative braking of a fuel cell vehicle equipped with the fuel cell stack diagnostic system;
a voltage rise determiner configured to determine whether a voltage rise due to regenerative braking of the fuel cell vehicle is a predetermined value or more; and
a power transistor controller configured to control the AC signal generator so that the voltage due to the regenerative braking is discharged by the power transistor, when the voltage rise due to regenerative braking determined by the voltage rise determiner is the predetermined value or more.
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Abstract
A method and an apparatus using a power transistor in a fuel cell stack diagnostic system provides an apparatus using a power transistor in a fuel cell stack diagnostic system. The apparatus includes a regenerative braking detector that detects regenerative braking of a fuel cell vehicle equipped with a fuel cell stack diagnostic system; a voltage rise determiner that determines whether a voltage rise due to regenerative braking of a fuel cell vehicle is a predetermined value or more; and a power transistor controller that controls an AC signal generator so that the voltage due to the regenerative braking is discharged by the power transistor, when the voltage rise due to regenerative braking determined by the voltage rise determiner is a predetermined value or more.
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Citations
6 Claims
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1. An apparatus comprising:
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a fuel cell stack; a fuel cell stack diagnostic system including;
a diagnosis control analyzer that diagnoses and analyzes a status of the fuel cell stack by measuring a current and a voltage of the fuel cell stack;
an alternating current (AC) signal generator that generates a diagnostic AC signal in accordance with control of the diagnosis control analyzer; and
a power transistor that is driven in response to the diagnostic AC signal outputted from the AC signal generator and includes a diagnostic AC component into the current of the fuel cell stack;a regenerative braking detector configured to detect regenerative braking of a fuel cell vehicle equipped with the fuel cell stack diagnostic system; a voltage rise determiner configured to determine whether a voltage rise due to regenerative braking of the fuel cell vehicle is a predetermined value or more; and a power transistor controller configured to control the AC signal generator so that the voltage due to the regenerative braking is discharged by the power transistor, when the voltage rise due to regenerative braking determined by the voltage rise determiner is the predetermined value or more. - View Dependent Claims (2, 3)
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4. A method of using a power transistor in a fuel cell stack diagnostic system, which includes:
- a diagnosis control analyzer that diagnoses and analyzes the status of the fuel cell stack by measuring the current and the voltage of the fuel cell stack;
an AC signal generator that generates a diagnostic AC signal in accordance with control of the diagnosis control analyzer; and
the power transistor that is driven in response to the diagnostic AC signal outputted from the AC signal generator and includes a diagnostic AC component into the current of the fuel cell stack, the method comprising;detecting regenerative braking of a fuel cell vehicle equipped with the fuel cell stack diagnostic system; determining whether a voltage rise due to regenerative braking of the fuel cell vehicle is a predetermined value or more; and discharging the voltage due to the regenerative braking by the power transistor, when the voltage rise due to regenerative braking is a predetermined value or more. - View Dependent Claims (5, 6)
- a diagnosis control analyzer that diagnoses and analyzes the status of the fuel cell stack by measuring the current and the voltage of the fuel cell stack;
Specification