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US 8,105,720 B2Granted
Humidity sensing device for use in fuel cell systems
AssigneeGM Global Technologies LLC
InventorsChristian Koenig, Ulrich Dumke, Rocco Schoene
Life of this patent
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Abstract
A humidity sensing device for measuring a humidity of a reactant stream in a fuel cell system is provided. The humidity sensing device includes a humidity sensor coupled to a sensor housing. The sensor housing is adapted to selectively move the humidity sensor to an operating position and to a non-operating position in the fuel cell system. A fuel cell system and a method employing the humidity sensing device in the fuel cell system is also provided.
Claims16
A humidity sensing device for measuring a humidity of a reactant stream in a fuel cell system, comprising:
- a humidity sensor;
- a sensor housing coupled to the humidity sensor, the sensor housing adapted to selectively expose the humidity sensor to the reactant stream of the fuel cell;
- and
- a main housing having a passage extending there through, the main housing having a wall with an aperture formed therein, the aperture in communication with the passage and adapted to slidably receive the sensor housing therein.
1 more element
A fuel cell system, comprising:
- a fuel cell stack including a plurality of fuel cells and a reactant inlet;
- a reactant source in fluid communication with the reactant inlet and adapted to provide a reactant stream to the fuel cell stack;
- a water vapor transfer device in fluid communication with the reactant source and the reactant inlet, the water vapor transfer device adapted to humidify the reactant stream;
- and
- a humidity sensing device in fluid communication and formed integrally with the reactant stream, the humidity sensing device including a humidity sensor coupled to a sensor housing adapted to selectively move the humidity sensor between an operating position in contact with the reactant stream and a non-operating position out of contact with the reactant stream.
2 more elements
Dependencies are inferred from the claim text.