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

An air supply and fuel cell technology, applied in fuel cells, fuel cell additives, heat measurement, etc., can solve problems such as measurement failure, easy generation of condensed water, failure of humidity sensors, etc.

Inactive Publication Date: 2007-08-08
SAIC MOTOR
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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

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

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Embodiment Construction

[0017] As shown in Figure 1, the hydrogen storage tank 1 of the fuel cell system stores high-pressure hydrogen gas, and the above-mentioned hydrogen gas enters the fuel cell stack 3 after passing through the pressure reducing valve 2, and a hydrogen circulation pump 4 is provided on the outlet side of the fuel cell stack 3 to return the hydrogen gas flowing out battery stack3. The air supply system of the fuel cell comprises a filter 9, a compressor 8, a humidifier 7 and an intercooler 11, the outside air is filtered through the filter 9 and enters the compressor 8, and the clean air is heated in the compressor (the temperature exceeds 130°C), and then enter the humidifier 7 to increase the humidity. Since the working temperature of the fuel cell stack 3 is below 70° C., the humidified high-temperature air also passes through the intercooler 11 to cool down, and finally enters the fuel cell stack 3 .

[0018] A humidity sensor 13, a first pressure gauge 15 and a first tempera...

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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...

Claims

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Application Information

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IPC IPC(8): H01M8/04G01D21/02G01D7/00G01K7/00G01N19/10H01M8/04119H01M8/04492
CPCY02E60/50
Inventor 税方赵景辉吴兵
Owner SAIC MOTOR
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