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

Inactive Publication Date: 2012-04-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because nitrogen buildup typically occurs very quickly with high power transients, which can be time limited, the delay in sensor readings can cause hydrogen concentration measurements to be unavailable during the power up transient when hydrogen concentrations are highest

Method used

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

Examples

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Embodiment Construction

[0068] The following description of embodiments of the present invention relating to a hydrogen concentration sensor for a fuel cell system is merely illustrative in nature and in no way intended to limit the invention or its application or use.

[0069] figure 1 is a schematic plan view of a fuel cell system 10 including a fuel cell stack 12 having fuel cells 20 . Compressor 14 provides compressed air to the cathode side of fuel cell stack 12 via cathode input line 16 . The cathode exhaust gas is output from the fuel cell stack 12 through the cathode exhaust gas pipeline 18 . The injector 32 injects hydrogen from a hydrogen source 36 (eg, a high pressure tank) through the anode intake manifold 24 and into the anode side of the fuel cell stack 12 via the anode input line 34 . Fresh hydrogen gas from hydrogen source 36 is also routed through hydrogen concentration sensor assembly 28, described in detail below. The pressure sensor 22 measures the pressure of the fresh hydroge...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04G01N7/00
CPCH01M8/04805H01M8/04343H01M8/04798H01M8/04402H01M8/04552H01M8/04514Y02E60/50H01M8/04388
Inventor A.J.马斯林B.拉克什马南
Owner GM GLOBAL TECH OPERATIONS LLC
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