Air supply system of fuel cell with measurable humidity and humidity measuring method

Abstract

The invention relates to one fuel battery air supply system and its air humidity measurement method and provides one measurement humidity fuel battery air supply system, which comprises filter, compressor, humidity adding device and middle cooling device, wherein, the humidity adding device and middle cooling device set with humidity sensor, first pressure meter and first temperature sensor; the said middle cooling exit section is set with second pressure meter and second temperature sensor.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a fuel cell air supply system and a method for measuring the humidity of the supplied air. Background technique [0002] When the proton exchange membrane fuel cell is used as a vehicle, ship power system or portable, mobile and fixed power station, it must include battery stack, fuel hydrogen supply, air supply, cooling and heat dissipation, automatic control and power output. [0003] In order to ensure the stability of the long-term operation of the fuel cell, the proton exchange membrane currently used in the membrane electrode of the proton exchange membrane fuel cell needs water molecules to keep it moist during the operation of the battery, because only the hydrated protons can freely pass through the protons. The exchange membrane, from the anode end of the electrode to the cathode end of the electrode, participates in the electrochemical reaction. Otherwise, when a large amount of dry air...

AI Technical Summary

Problems solved by technology

[0005] Currently used fuel cells generally add a humidity sensor directly at the outlet section of the intercooler of the air supply system to measure the air humidity there, and obtain the air humidity of the fuel cell, but this method of obtaining the air humidity of the fuel cell exists The biggest problem is: most of the current humidity sensors have the disadvantage that once the probe is stained with condensed water, the measurement will fail, and the air in the air supply system passes through the compressor at a high temperature (over 130°C), and then humidifies and cools down. , there is a phase change at the outlet section of the intercooler, and condensed water is easily generated, which makes the humidity sensor malfunction. Once the condensed water is not taken away in time, it will greatly affect the system’s adjustment and control of the humidification device, and ultimately affect Fuel Cell Performance

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