System and method to start a fuel cell stack during a cold-start condition
First Claim
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1. A power supply system operable during a cold-start condition, comprising:
- a fuel cell stack electrically operable to produce direct current (DC) power;
a power conversion system electrically coupled to the fuel cell stack and operable to receive DC power from the fuel cell stack;
at least one battery electrically coupled to the power conversion system and operable to exchange battery DC power with the power conversion system; and
a controller at least operable to control operation of the power supply system such that at least an amount of pulsating current is supplied to the battery during the cold-start condition.
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Abstract
A system and method for operating a fuel cell stack and at least one battery during at least a cold-start condition includes operating a fuel cell stack at a reduced voltage during the cold-start condition, and/or sourcing pulsating current to a battery during the cold-start condition.
58 Citations
26 Claims
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1. A power supply system operable during a cold-start condition, comprising:
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a fuel cell stack electrically operable to produce direct current (DC) power; a power conversion system electrically coupled to the fuel cell stack and operable to receive DC power from the fuel cell stack; at least one battery electrically coupled to the power conversion system and operable to exchange battery DC power with the power conversion system; and a controller at least operable to control operation of the power supply system such that at least an amount of pulsating current is supplied to the battery during the cold-start condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for operating a fuel cell stack and at least one battery during at least a cold-start condition, the method comprising:
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operating the fuel cell stack at a reduced start-up direct current (DC) voltage during the cold-start condition so that excess heat generated within the fuel cell stack during the cold-start condition increases a temperature of the fuel cell stack, wherein the reduced start-up DC voltage is less than a nominal DC voltage received from the fuel cell stack during a normal operating condition; and sourcing the at least one battery with pulsating current during the cold-start condition so that excess heat generated within the battery during the cold-start condition increases a temperature of the battery, wherein DC power from the fuel cell stack is converted into at least a portion of the pulsating current sourced to the battery. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for operating a fuel cell stack and at least one battery during at least a cold-start condition, the method comprising:
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receiving direct current from at least one fuel cell of the fuel cell stack during the cold-start condition; converting at least a portion of the received direct current into pulsating current; and providing the pulsating current to the battery during at least a portion of the cold-start condition so that excess heat is generated within the battery during the cold-start condition to increase a temperature of the battery. - View Dependent Claims (22, 23, 26)
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24. A system for operating a fuel cell stack and at least one battery during at least a cold-start condition, the method comprising:
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means for operating the fuel cell stack at a reduced start-up direct current (DC) voltage during the cold-start condition so that excess heat generated within the fuel cell stack during the cold-start condition increases a temperature of the fuel cell stack, wherein the reduced start-up DC voltage is less than a nominal DC voltage received from the fuel cell stack during a normal operating condition; means for receiving a direct current from the fuel cell stack during the cold-start condition; means for converting at least a portion of the received DC current into alternating current; and means for providing the alternating current to the battery during at least a portion of the cold-start condition so that excess heat is generated within the battery during the cold-start condition to increase a temperature of the battery. - View Dependent Claims (25)
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Specification