A method of shutting down a fuel cell engine

CN122455831APending Publication Date: 2026-07-24UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Filing Date
2026-05-09
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

During the shutdown process of existing fuel cell engines, the effects of shutdown operating parameters, system structural parameters, and auxiliary load parameters are not effectively considered, leading to the formation of a hydrogen-air interface, which affects the durability and performance degradation of the fuel cell.

Method used

By systematically considering shutdown conditions, auxiliary load parameters, and stack and engine structural design parameters, the shutdown process of the fuel cell engine is optimized to avoid the formation of the hydrogen-air interface. This includes detailed calculations and adjustments in steps 1-9 to ensure the sealing of the anode and cathode regions.

Benefits of technology

The global optimization of the fuel cell engine start-up and shutdown process was achieved, which suppressed the performance degradation of the hydrogen-air interface and improved the durability of the fuel cell engine.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a fuel cell engine shutdown method, and belongs to the technical field of fuel cell engines. First, the fuel cell engine shutdown process is determined, and the structural parameters, operating conditions and auxiliary load current of the fuel cell stack are obtained. Then, the total oxygen amount of the cathode closed area when the air supply is closed and the air inlet and outlet throttle valves of the stack are closed and the consumed oxygen amount of the cathode after the auxiliary load is applied are calculated to obtain the minimum hydrogen amount. If the minimum hydrogen amount is greater than or equal to the total hydrogen amount of the anode closed area when the hydrogen supply is closed and the hydrogen upstream and downstream valves of the stack are closed, the fuel cell engine shutdown process is directly executed. Otherwise, at least one parameter in the structural parameters, operating conditions and auxiliary load current of the fuel cell stack is adjusted until the condition is met, and then the fuel cell engine shutdown process is executed, so that the hydrogen-air interface generated in the current shutdown process and the next startup process is avoided, the fuel cell engine shutdown process is optimized, and the durability of the vehicle fuel cell engine is improved.
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