Novel negative electrode runner suitably used for aerospace static water discharge

Abstract

A novel negative electrode runner suitably used for aerospace static water discharge comprises a negative electrode pole plate (1), static water discharge valves (2) and a negative electrode runner (3), wherein the negative electrode runner (3) is a groove-shaped passage on a plane of the negative electrode pole plate (1), an airflow inlet and an airflow outlet are respectively formed in two sides, parallel to each other, of the negative electrode pole plate (1), an air inlet and an air outlet communicate with each other by the negative electrode runner (3), the static water discharge valves (2) are arranged on a side wall of the negative electrode runner (3) and swing under circuit control, the materials of the static water discharge valves (2) are hydrophilic materials, and a proton exchange membrane of a proton exchange membrane fuel cell covers one side, where the negative electrode runner (3) is formed, of the negative electrode pole plate (1). The novel negative electrode runner is favorable for static water discharge, a membrane water logging phenomenon caused by long-term working of the fuel cell is improved, and the performance of the fuel cell is improved.

Description

technical field [0001] The invention relates to a fuel cell cathode flow channel. Background technique [0002] Proton Exchange Membrane Fuel Cell (PEMFC for short) is a kind of fuel cell. Hydrogen gas diffuses from the anode diffusion layer to the anode catalyst layer through the anode channel, where it dissociates into protons and electrons, and the electrons pass through the outer The circuit returns to the cathode, and protons diffuse to the cathode through the proton exchange membrane, and react with the oxygen molecules and electrons generated in the cathode catalytic layer to form water, releasing electrical energy and heat energy. [0003] When PEMFC has a large current density or a small airflow velocity, the reactant water will condense at the cathode saturation, causing the cathode to be flooded, making the reaction gas distribution uneven, and unable to reach the cathode catalytic layer through the membrane cathode diffusion layer for electrochemical reaction, re...

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Problems solved by technology

[0003] When PEMFC has a large current density or a small airflow velocity, the reactant water will condense at the cathode saturation, causing the cathode to be flooded, making the reaction gas distribution uneven, and unable to reach the cathode catalytic layer through the membrane cathode diffusion layer for electrochemical reaction, resulting in Battery performance degrades

[0004] At present, fuel cell water management has problems such as insufficient drainage device stability and uncontrollable fluid distribution in the flow channel. Existing technologies such as installing needle-shaped flow guide devices in fuel cells are lacking in improving drainage effects and fuel cell drainage efficiency.

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