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Fuel cell humidifying system pressure self-adaptive balancing method based on membrane humidifying

A fuel cell and system pressure technology, applied in fuel cells, fluid pressure control, control/regulation systems, etc., can solve problems such as slow response speed, difficulty in quickly reaching the expected state, and prone to failure of membrane humidifiers. Reduce, improve test efficiency, save the effect of electronic control system

Active Publication Date: 2020-11-03
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the response speed of the water side pressure change is slow, it is difficult to quickly reach the expected state when the gas pressure changes, and the membrane humidifier is prone to failure

Method used

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  • Fuel cell humidifying system pressure self-adaptive balancing method based on membrane humidifying
  • Fuel cell humidifying system pressure self-adaptive balancing method based on membrane humidifying
  • Fuel cell humidifying system pressure self-adaptive balancing method based on membrane humidifying

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Experimental program
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Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the fuel cell humidification system pressure adaptive balance method based on membrane humidification, the system includes:

[0038] Warm water circulation circuit, the water supply pump 3 is set in the warm water circulation circuit, and the heating water tank 2 containing deionized water with built-in heating device, the water inlet end of the water delivery pump 3 is connected with the heating water tank 2, the water delivery end of the water delivery pump 3 is connected with the The water inlet of humidifier 1 is connected, and the water outlet of membrane humidifier 1 is connected with heating water tank 2;

[0039] Water supply pipeline, used to connect and replenish deionized water into the heating water tank 2;

[0040] The gas pipeline is used to pass the dry gas into the air inlet of the membrane humidifier 1;

[0041] Connect the moisture output pipeline of the air outlet of the membrane humidifier 1;

[0042] High-level water ta...

Embodiment 2

[0058] Such as figure 2 As shown, the difference between Embodiment 2 and Embodiment 1 is that: in the warm water circulation circuit, a secondary heating water tank 18 is provided on the path from the heating water tank 2 to the water delivery pump 3, and the secondary heating water tank 18 has a built-in heating device to assist Heating deionized water; in the application process, the high liquid level sensor 10 and the low liquid level sensor 11 are far apart, and the supplementary water pump 15 works intermittently. When replenishing water, the water temperature of the heating water tank 2 will decrease. Compensate the temperature of deionized water to avoid fluctuations in water temperature.

Embodiment 3

[0060] Such as image 3 As shown, the difference between embodiment 3 and embodiment 1 is that: a preheating water tank 19 is connected to the water supply pipeline, and a heating device is built in the preheating water tank 19 to preheat deionized water. On the passage between the valve 17 and the heating water tank 2; in the application process, the high liquid level sensor 10 and the low liquid level sensor 11 are far apart, the supplementary water pump 15 works intermittently, and the water temperature of the heating water tank 2 will decrease when replenishing water. Therefore, before the deionized water enters the heating water tank 2, the preheating water tank 19 is used to increase the water temperature to avoid fluctuations in the water temperature in the heating water tank 2.

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Abstract

The invention relates to a fuel cell humidifying system pressure self-adaptive balancing method based on membrane humidification in the technical field of fuel cell testing. A membrane humidifier is applied to a fuel cell test board humidifying system, the power consumption of a test board can be greatly reduced, the structure of the test board is simplified, and the size of the test board is reduced. By the adoption of the pressure balance self-adaptive control method, rapid and automatic balance of pressure at the two sides of gas and water of the membrane humidifier can be achieved, so thatthe failure rate of the membrane humidifier due to pressure imbalance is greatly reduced, and the reliability of the fuel cell test board adopting the membrane humidifier as a humidifying scheme is improved. The method provided by the invention can be applied to the fuel cell test board and also can be applied to the fuel cell system integration.

Description

technical field [0001] The invention relates to the technical field of fuel cell testing, in particular to a fuel cell humidification system pressure self-adaptive balancing method for a fuel cell test bench based on membrane humidification. Background technique [0002] A fuel cell is a power generating device that converts the chemical energy of fuel and oxidant directly into electrical energy. The humidity of the reaction gas has a great influence on the performance of the fuel cell. Therefore, when testing the fuel cell, the fuel cell test bench needs to control the humidity of the reaction gas entering the fuel cell. Humidification methods currently used in fuel cell test benches mainly include bubbling humidification, spray humidification, enthalpy wheel humidification, and membrane humidification. Among them, membrane humidification has many advantages such as small size of humidifier, simplified process, simple structure, low power consumption, rich variety of stand...

Claims

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Application Information

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IPC IPC(8): H01M8/04119G05D16/02
CPCG05D16/028H01M8/04126Y02E60/50
Inventor 柯长春章俊良侯俊波庄小东张龙海夏国锋申欣明
Owner SHANGHAI JIAO TONG UNIV
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