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Air-cooled fuel cell system

A fuel cell system and fuel cell technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve problems such as the impact of fuel cell performance that is difficult to solve, and achieve the goal of being suitable for large-scale production, the system is simple, the Effects that are easy to operate and control

Pending Publication Date: 2021-03-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Whether using a self-humidifying membrane or doing water retention treatment in the cathode catalytic layer and diffusion layer, it is difficult to solve the impact of changes in environmental factors such as temperature and humidity on the performance of fuel cells in reality.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such asfigure 1 As shown, a common steel cylinder with a volume of 40 liters and a pressure of 12 MPa is selected as the gas source, Baode solenoid valve and SMC regulator valve are selected, a self-made membrane humidifier and tail solenoid valve are selected, and 29 air-cooled fuel cells are self-made Electric stack and axial flow fan, the performance test of the fuel cell, the results are as follows Figure 5 shown. At a room temperature of 22°C and a relative humidity of 46%, using hydrogen as fuel, when the hydrogen partial pressure (gauge pressure) is 0.05MPa, and using air cooling for heat dissipation, the current density reaches 0.6A / cm 2 , the output power reaches 970W.

Embodiment 2

[0038] Such as figure 2 As shown, a carbon fiber-wound aluminum alloy bottle with a volume of 9 liters and a pressure of 35 MPa is selected as the gas and hydrogen source, in which the bottle valve, the gas source switch valve and the pressure regulator valve are an integrated structure, and a self-made ejector and tail exhaust are selected. Solenoid valve, self-made 32-section air-cooled fuel cell stack and axial fan, the performance test of the stack, the results are as follows Figure 6 shown. At a room temperature of 24°C and a relative humidity of 52%, using hydrogen as fuel, when the hydrogen partial pressure (gauge pressure) is 0.05MPa, and using air cooling for heat dissipation, the current density reaches 0.65A / cm2, and the output power reaches 1250W.

Embodiment 3

[0040] In order to test the stability of the fuel cell system except for the gas cylinder, the centralized pipeline in the laboratory is selected to continuously supply hydrogen to meet the demand for hydrogen consumption. The emergency manual switch valve and SMC pressure regulator valve are used, and the self-made ejector and tail solenoid valve are used. , self-made 32 air-cooled fuel cell stacks and axial fans to test the stability of fuel cells. The result is as Figure 7 shown. When the room temperature range is 22-25°C and the relative humidity range is 36-70%, hydrogen is used as fuel, when the hydrogen partial pressure (gauge pressure) in the stack is 0.05MPa, and when air cooling is used for heat dissipation, the current density reaches 0.65A / cm 2 , the output power reaches 1240W, and the performance has not been attenuated after 200 hours of continuous operation.

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Abstract

The invention provides an air-cooled fuel cell system. The air-cooled fuel cell system mainly comprises a hydrogen source, an air source switch electromagnetic valve, a pressure stabilizing valve, a hydrogen water circulator, a tail exhaust electromagnetic valve, a fuel cell stack, an exhaust fan, a DC / DC inverter and the like. And the hydrogen water circulator can partially circulate the water discharged from the anode to humidify the fresh hydrogen. And the tail discharge electromagnetic valve is used for discharging a very small amount of impurity gas contained in the hydrogen at regular time. The fuel cell stack is of a cathode open structure, air introduced by forced convection of an exhaust fan cools the cell, and oxygen participating in electrochemical reaction is provided at the same time. The input of the DC / DC inverter is the output end of the fuel cell, and the DC / DC inverter can be provided with one or more output ends for supplying power to the exhaust fan and other electric equipment. The air-cooled fuel cell system is simple in structure, simple and reliable in component and process control, very suitable for large-scale processing and manufacturing, capable of reducing the cost and capable of being practically applied.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a battery system suitable for improving the performance of an air-cooled fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a zero-emission power generation device with low operating temperature, low noise, environmental friendliness and high energy conversion efficiency that can be quickly started at room temperature, and is known as the ultimate energy source. Proton exchange membrane fuel cells can be used in mobile power supplies, portable power supplies, aviation power supplies, vehicle power supplies, stationary power stations, etc., and can meet the needs of electricity in many fields, and are the fuel cells closest to practical applications. [0003] When the hydrogen fuel cell is working, in addition to the external output of electric energy, it will also produce about 40-50% of the heat. There are two main cooling meth...

Claims

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Application Information

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IPC IPC(8): H01M8/04007H01M8/04089H01M8/04828
CPCH01M8/04007H01M8/04089H01M8/04835Y02E60/50Y02P70/50
Inventor 周利洪有陆邵志刚李松于诚溢
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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