Flow field plate for improving performance of fuel cell

CN119786645AActive Publication Date: 2025-04-08SHANGHAI INST OF SPACE POWER SOURCES
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Patent Information

Application Number
CN202411771728.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-04
Publication Date
2025-04-08
Estimated Expiration
2044-12-04

AI Technical Summary

Technical Problem

Traditional serpentine flow field plates can easily lead to a decrease in gas flow rate, accumulation of liquid water to form flooding, increase flow resistance and pressure drop in the flow path, affecting the performance of fuel cells.

Method used

Porous stops are provided in the flow channel steering section, and the strong water absorption is used to reduce the passage through which the gas flows through at low current density to promote the gas flow rate; absorb moisture and shrink at high humidity, increase the gas flow channel and reduce flow resistance.

Benefits of technology

It improves the gas mass transfer efficiency, reduces pressure drop and flow resistance, prevents water flooding, ensures the stable operation of fuel cells in high humidity environments, and automatically optimizes performance under different working conditions.

✦ Generated by Eureka AI based on patent content.

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    Figure CN119786645A_ABST
Patent Text Reader

Abstract

The invention discloses a flow field plate for improving the performance of a fuel cell. The flow field plate comprises a flow field plate body, a baffle block, a flow channel and a flow channel ridge, the flow channel is of a snakelike structure and is arranged on the flow field plate body, the flow channel comprises a plurality of straight flow sections and turning sections, the turning sections are connected with the end parts of the adjacent straight flow sections, and a flow channel ridge is formed between the adjacent straight flow sections; the check block is arranged on the side wall tightly attached to the steering section, so that a channel is formed between the check block and the end part of the runner ridge; or the check block is arranged at the end part tightly attached to the runner ridge, so that a channel is formed between the check block and the side wall of the steering section. When the check block is dried, the pressure drop in the flow channel is reduced, and the mass transfer efficiency of gas is improved; the water logging phenomenon can be effectively prevented when the stop blocks absorb water, meanwhile, the flow resistance of gas is reduced, and by means of the automatic adjusting mechanism, the fuel cell can automatically optimize the performance, reduce the energy loss and improve the overall energy efficiency under different working conditions.
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Citation Information

Patent Citations

  • Fuel cell flow field plate with liquid water self-adaptive combined flow guide structure

    CN114050282A

  • Bionic bipolar plate with active drainage surface and implementation method thereof

    CN115995574A

  • Bipolar plate runner and electric pile

    CN118054034A

  • Container for fuel cell, fuel cell, and electronic apparatus

    JP2005100834A

  • Water control system design of fuel cell

    TW200731610A