Methods for controlling the operation of a fuel cell system

The method addresses water-related issues in fuel cell systems by diagnosing shortages and implementing regenerative operations to adjust parameters, preventing deterioration and maintaining performance.

DE102014223643B4Active Publication Date: 2026-06-03HYUNDAI MOTOR CO LTD +1
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
HYUNDAI MOTOR CO LTD
Filing Date
2014-11-19
Publication Date
2026-06-03

AI Technical Summary

Technical Problem

Existing fuel cell systems face challenges in maintaining optimal operating conditions due to fluctuating water volumes, which can lead to flooding or dehydration, affecting performance and reducing output current, and conventional control methods fail to effectively prevent deterioration.

Method used

A method for controlling the fuel cell system by diagnosing water shortage and deterioration, implementing regenerative operating modes to adjust operating parameters such as temperature, air pressure, and stoichiometric ratios to prevent dehydration and maintain performance.

Benefits of technology

Prevents fuel cell stack deterioration and maintains performance by anticipating and addressing water-related issues through regenerative operations, thereby extending the lifespan and ensuring consistent output.

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Abstract

Method for controlling the operation of a fuel cell system, comprising the steps for: Diagnosing, by means of a control system, a water shortage condition in a fuel cell stack based on a decrease in cooling capacity and a deterioration of the fuel cell stack; Determine, by controlling, a diagnostic level of the fuel cell system based on the diagnosed water shortage state of the fuel cell stack; and Performing, by controlling, a regenerative operation by selecting a regenerative operating mode that corresponds to the specified diagnostic level, wherein the regenerative operating mode comprises: a first regenerative operating mode to reduce an operating limit temperature of the fuel cell stack; a second regenerative operating mode to increase an air pressure at the cathode side of the fuel cell stack or to decrease a stoichiometric ratio of air; and a third regenerative operating mode to decrease a hydrogen gas pressure at an anode side of the fuel cell stack or to increase a stoichiometric ratio of hydrogen.
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