Purging arrangement for an anode subsystem, fuel cell system and vehicle

The flushing arrangement with a buffer and bypass system for anode exhaust gas in fuel cell systems addresses fuel leakage issues, enhancing safety by evenly mixing gases and controlling fuel concentration.

DE102023120104A1Pending Publication Date: 2025-01-30BAYERISCHE MOTOREN WERKE AG
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Patent Information

Application Number
DE102023120104
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-07-28
Publication Date
2025-01-30

AI Technical Summary

Technical Problem

Existing fuel cell systems face the risk of ignition due to fuel leakage in the collective exhaust gas, which can mix with cathode exhaust gas and potentially ignite at ignition sources within the system.

Method used

A flushing arrangement is introduced for the anode subsystem, featuring a buffer and bypass system to manage anode exhaust gas, using a porous material to dilute and control the fuel concentration, combined with a bypass valve and mixing area to integrate with cathode exhaust gas safely.

Benefits of technology

The solution effectively reduces the risk of explosion by evenly mixing anode and cathode exhaust gases, ensuring safe operation and efficient fuel concentration management.

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Abstract

The present invention relates to a purging arrangement (10) for an anode subsystem (11) of a fuel cell system (12), comprising an anode exhaust line (13) for directing anode exhaust (20) from the anode subsystem (11) into a collecting exhaust line (21) of the fuel cell system (12), a buffer (14) positioned in the anode exhaust line (13) for buffering an anode exhaust flow in the anode exhaust line (13), and a bypass (15) in the anode exhaust line (13) for directing the anode exhaust (20) past the buffer (14). The invention further relates to a fuel cell system (12) with the purging arrangement (10) and a vehicle (100) with the fuel cell system (12).
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Citation Information

Patent Citations

  • Fuel cell device and method for operating a fuel cell device

    DE102014103724A1