Hydrogen concentration sensor utilizing cell voltage resulting from hydrogen partial pressure difference

A concentration sensor, hydrogen technology, applied in fuel cells, electrochemical generators, fuel cell additives, etc., can solve the problem of unavailable hydrogen concentration measurement
CN102403518AInactive Publication Date: 2012-04-04GM GLOBAL TECH OPERATIONS LLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GM GLOBAL TECH OPERATIONS LLC
Publication Date
2012-04-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a hydrogen concentration sensor utilizing cell voltage resulting from hydrogen partial pressure difference. Provided is a hydrogen concentration sensor for measuring the hydrogen concentration in an anode sub-system of a fuel cell system. The hydrogen concentration sensor includes a membrane, a first catalyst layer on one side of the membrane and a second catalyst layer on an opposite side of the membrane where the sensor operates as a concentration cell. The first catalyst layer is exposed to fresh hydrogen for the anode side of a fuel cell stack and the second catalyst layer is exposed to an anode recirculation gas from an anode exhaust of the fuel cell stack. The voltage generated by the sensor allows the hydrogen partial pressure in the recirculation gas to be determined, from which the hydrogen concentration can be determined.
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Description

technical field

[0001] This invention relates generally to a hydrogen concentration sensor for determining the concentration of hydrogen in an anode subsystem of a fuel cell system, and more particularly, to a hydrogen concentration sensor for determining the concentration of hydrogen in an anode subsystem of a fuel cell system utilizing anode exhaust gas recirculation, wherein the The Nernst equation to determine the hydrogen partial pressure in the recycle gas from the hydrogen concentration sensor voltage output, and use the hydrogen partial pressure to determine the hydrogen concentration in the recycle gas. Background technique

[0002] Hydrogen is an attractive fuel because it is clean and can be used to efficiently generate electricity in fuel cells. A hydrogen fuel cell is an electrochemical device consisting of an anode and a cathode with an electrolyte in between. The anode receives hydrogen gas and the cathode receives oxygen or air. Hydrogen gas is separated in...

Claims

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