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US 6,376,111 B1Granted
System and method for controlling the humidity level of a fuel cell
AssigneeGeneral Motors Corporation
InventorsMark F. Mathias, Stephen A. Grot
Life of this patent
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AssigneeGeneral Motors Corporation
InventorsMark F. Mathias, Stephen A. Grot
Estimating the term…
A system for controlling the humidity level of a fuel cell is provided. The system includes a fuel cell, a humidifier for humidifying the fuel cell, and a controller for determining the humidity level of the fuel cell and controlling the humidifier in response to the determined humidity level. The resistance of the fuel cell varies as a function of the humidity level of the fuel cell. Thus, in a preferred system, the controller calculates the resistance of the fuel cell via measurements of AC preferred voltage and current components to determine the humidity level of the fuel cell. A method for controlling the humidity level of a fuel cell is also provided. The steps of the method include: determining the humidity level of the fuel cell, and humidifying the fuel cell in response to the determined humidity level.
A system for controlling the humidity level of a fuel cell, comprising:
A system for controlling the humidity level of a fuel cell, comprising:
A method of controlling the humidity level of a fuel cell, comprising the steps of:
Dependencies are inferred from the claim text.