System and method for fuel cell humidifier leak detection

By using the first oxygen sensor to measure the first oxygen concentration of the humidifier in the fuel cell system, the problem of leakage detection of fuel cell humidifier is solved, and accurate identification of leakage and maintenance of system performance is achieved.

CN119725628APending Publication Date: 2025-03-28CUMMINS LTD
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Patent Information

Application Number
CN202411339120.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-09-26
Filing Date
2024-09-25
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art is difficult to effectively detect and identify leakage from fuel cell humidifiers, resulting in a degradation of fuel cell stack performance.

Method used

By introducing a first oxygen sensor into the fuel cell system, the first oxygen concentration at the wet side outlet of the humidifier is measured, and whether there is leakage in the humidifier is determined based on the threshold value.

Benefits of technology

Accurate detection and identification of fuel cell humidifier leakage is achieved, helping to maintain the performance and life of fuel cell systems.

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Abstract

A fuel cell system includes a fuel cell stack, a humidifier including a wet side and a dry side, the wet side fluidly coupled downstream of the fuel cell stack and the dry side fluidly coupled upstream of the fuel cell stack, and a first oxygen sensor. The humidifier is configured to humidify the dry stream of air to form a partially humidified stream of air that exits the dry side of the humidifier and enters the fuel cell stack. A first oxygen sensor is disposed downstream of the wet side of the humidifier and is configured to measure a first oxygen concentration of the discharged airflow exiting the wet side of the humidifier to determine the presence of a leak in the humidifier.
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