Humidification system for small-sized PEM fuel battery test platform

A fuel cell and test bench technology, applied in the field of humidification system, can solve problems such as poor transmission capacity of proton exchange membrane, degradation of battery performance, and inability of protons to pass through

Inactive Publication Date: 2008-04-23
SHANGHAI PALTON FUEL CELL SYST
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  • Abstract
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  • Claims
  • Application Information

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
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Method used

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  • Humidification system for small-sized PEM fuel battery test platform
  • Humidification system for small-sized PEM fuel battery test platform

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Embodiment Construction

[0014] The deionized water from the deionized water pipeline enters the liquid phase heater 2 through the replenishment pump 1, and is sent to the balance tank 6 after being heated to a predetermined temperature T1. The reactant gas from the reactant gas source enters the gas preheater 4 after being metered by the gas flow controller 3 according to the specified flow rate, and enters the humidifier 5 after being heated to a predetermined temperature T2. The deionized water in the balance tank enters the humidifier 5 through the balance pipe to participate in gas-liquid exchange, and exchanges heat and moisture to the reactant until it reaches saturation. A humidifier with a high gas-liquid exchange area is equipped with a specific surface area of ​​700-2000M 2 / M 3 The theoretical number of boards per meter of filler can reach 8-40. This greatly strengthens the gas-liquid exchange between the reactants and the hot deionized water, ensuring that the humidified gas is fully sa...

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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...

Claims

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Application Information

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IPC IPC(8): H01M8/04G01R31/36H01M8/04701H01M8/04828
CPCY02E60/50
Inventor 曾壎刘振泰
Owner SHANGHAI PALTON FUEL CELL SYST
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