Humidification system for small-sized PEM fuel battery test platform

Abstract

This invention provides a gas heating and wetting system used in test platforms of small PEM fuel batteries, which applies a method of preheating gas-phase and liquid-phase to a preset temperature for increasing the control accuracy of a small wetting system so as to reduce load of heating of a wetter, in which, deionized water entering into an wetting system and the reactant gas can be pre-designed to a bit higher than saturated temperature by a control system in terms of the flow of the wetted reactant gas, thus, the gas reactant entering into the wetter imbibes by transmitting medium under the temperature closing to saturation so as to reduce axial temperature difference of the wetter.

Description

technical field [0001] The invention relates to fuel cell technology, in particular to a humidification system for a small-scale PEM fuel cell test bench. Background technique [0002] A proton exchange membrane fuel cell is a device that can continuously and efficiently convert hydrogen-rich fuel and oxidant into electrical energy. A proton exchange membrane fuel cell consists of a three-in-one membrane electrode (Membrane Electrode Assembly, MEA) assembled by coating catalytic layers on both sides of the proton membrane, a flow field plate on the fuel side of the reaction gas, and a flow field plate on the air side. Its core component is a three-in-one membrane electrode, and its structure is: a proton exchange membrane in the middle, a cathode catalytic layer and an anode catalytic layer on both sides, and a gas diffusion layer on the outermost side. [0003] When the proton exchange membrane fuel cell is working, the fuel passes through the anode gas diffusion layer, an...

AI Technical Summary

Problems solved by technology

Otherwise, when a large amount of dry air is supplied to the fuel cell, they will easily take away the water molecules in the proton exchange membrane when they leave, resulting in the inability of protons to pass through the proton exchange membrane, a sharp increase in the internal resistance of the electrode, and a sharp decline in battery performance

Therefore, the purpose of humidifying the proton exchange membrane in the fuel cell is to maintain the ability of the proton exchange membrane to transmit protons. If the humidification is insufficient, the transmission capacity of the proton exchange membrane will be poor, which will affect the performance of the battery; Degradation of battery performance

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