Fuel cell system control
First Claim
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1. A system for controlling an output of a fuel cell, said system comprising:
- a controller;
a fuel cell in communication with said controller;
an energy storage device directly paralleled to said fuel cell; and
wherein said controller controls an output voltage of said fuel cell and an output voltage of said energy storage device.
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Abstract
A control system (20) for controlling the state of charge in an energy storage device (28) by manipulating the voltage of a fuel cell (24) through dynamic system modeling of predetermined parameters (21) for the fuel cell (24) as well as the energy storage device (28). According to the method (100) of the present invention, manipulation (108) of predetermined parameters related to the fuel cell and the energy storage device control the energy storage device to a desired state of charge or divides the load current between the two devices.
26 Citations
17 Claims
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1. A system for controlling an output of a fuel cell, said system comprising:
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a controller;
a fuel cell in communication with said controller;
an energy storage device directly paralleled to said fuel cell; and
wherein said controller controls an output voltage of said fuel cell and an output voltage of said energy storage device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling an output of a fuel cell system having a controller, a fuel cell in communication with the controller, an energy storage device directly paralleled to the fuel cell, and an external load, said method comprising the steps of:
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determining a desired state of charge for said energy storage device;
measuring a load current;
modeling predetermined parameters of the fuel cell and the energy storage device based on said desired state of charge; and
controlling a state-of-charge for the energy storage device based on said predetermined parameter models. - View Dependent Claims (10, 11, 12, 13)
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14. A method of controlling the state of charge for an energy storage device in a system having a fuel cell in communication with a controller and directly paralleled to an energy storage device and an external load, said method comprising the steps of:
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determining a current state of charge for the energy storage device;
determining a desired state of charge for the energy storage device;
modeling predetermined parameters of the fuel cell;
modeling predetermined parameters of the energy storage device;
controlling a voltage of the fuel cell based on the predetermined parameter models, whereby the fuel cell voltage is used to adjust the current state of charge to the desired state of charge for the energy storage device. - View Dependent Claims (15, 16, 17)
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Specification