Tail gas treatment device for fuel cell system and fuel cell system

A fuel cell system and tail gas treatment technology, applied in fuel cells, electrical components, circuits, etc., can solve problems such as increased risk of explosion and excessive hydrogen concentration, and achieve the effect of improving overall safety and reducing concentration

Inactive Publication Date: 2020-11-06
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides an exhaust gas treatment device for a fuel cell system and a fuel cell system to solve the problem in the related art that the concentration of hydrogen gas discharged during the hydrogen purging process is too high, resulting in an increased risk of explosion

Method used

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  • Tail gas treatment device for fuel cell system and fuel cell system
  • Tail gas treatment device for fuel cell system and fuel cell system

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Embodiment 1

[0032] see figure 1 As shown, the embodiment of the present invention provides an exhaust gas treatment device for a fuel cell system, wherein the fuel cell system includes a first fuel cell stack 1, and the exhaust gas treatment device Z1 includes a second gas-water separator 2 and a second fuel cell Stack 3; the second gas-water separator 2 is connected with the second anode hydrogen inlet pipe 4 and the first anode hydrogen outlet pipe 5, and the second gas-water separator 2 obtains the first fuel cell stack 1 through the second anode hydrogen inlet pipe 4 The gas-liquid mixture in the second gas-water separator 2 passes through the first anode hydrogen outlet pipe 5 into the second fuel cell stack 3, and unused water and nitrogen flow into the atmosphere; the second fuel cell The stack 3 is communicated with a second cathode inlet pipe 6, a second anode hydrogen outlet pipe 7 and a second cathode outlet pipe 8, and the second fuel cell stack 3 obtains air in the atmosphere...

Embodiment 2

[0036]Its basic content is the same as embodiment 1, and the difference is:

[0037] The exhaust gas treatment device Z1 also includes a storage battery 9, which is connected to the second fuel cell stack 3 through a diode D1 and a wire harness, and the voltage of the storage battery 9 is lower than that of the second fuel cell stack 3, and the second fuel cell stack 3 is connected to the fuel cell stack 3. After the hydrogen gas discharged from the anode of the system is recycled and reused, the generated electric energy can directly charge the storage battery 9, which improves the utilization efficiency of hydrogen gas.

[0038] Since the second fuel cell stack 3 is directly connected to the storage battery 9, and the fuel cell has a one-way output characteristic (that is, it can only output, but cannot be input), it is necessary to set the total voltage in the second fuel cell stack 3 higher than that of the vehicle battery 9, the battery 9 can be charged, otherwise the fue...

Embodiment 3

[0042] Its basic content is the same as embodiment 1, and the difference is:

[0043] The exhaust gas treatment device Z1 also includes a fan 10 . The fan 10 is arranged on the side of the second cathode inlet pipe 6 . While the fan 10 is cooling the second fuel cell stack 3, the air can be introduced into the second fuel cell stack 3 through the second cathode air intake pipe 6, so that the cathode air intake circuit of the second fuel cell stack 3 There is no need to set up booster equipment such as air compressor 121, and the cathode air intake mode is equivalent to the air intake mode of a traditional naturally aspirated engine, that is, it can directly inhale atmospheric air at normal pressure. Therefore, more air is blown in by the fan 10 The natural air is used by the second fuel cell stack 3 , that is, sufficient reaction air is provided for the second fuel cell stack 3 .

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Abstract

The invention relates to a tail gas treatment device for a fuel cell system and the fuel cell system and relates to the technical field of fuel cells, the tail gas treatment device comprises a secondgas-water separator and a second fuel cell stack; the second gas-water separator acquires a gas-liquid mixture in the first fuel cell stack through a second anode hydrogen inlet pipe; gas-water separation is carried out on the gas-liquid mixture; the separated hydrogen is introduced into the second fuel cell stack through the first anode hydrogen outlet pipe to be subjected to a redox reaction with air to generate water and generate electricity; and unused hydrogen and water in the second fuel cell stack are introduced into the atmosphere, and the hydrogen exhausted in the hydrogen purging process is subjected to redox reaction again in the tail gas treatment device, so that the hydrogen exhausted from the tail gas of the fuel cell system is reduced. Therefore, the concentration of hydrogen exhausted in the hydrogen purging process can be reduced through the tail gas treatment device, and the overall safety of the system is improved.

Description

technical field [0001] The present application relates to the technical field of fuel cells, in particular to an exhaust gas treatment device for a fuel cell system and a fuel cell system. Background technique [0002] A proton exchange membrane fuel cell is a device that uses the reaction of hydrogen and oxygen to generate electricity, that is, hydrogen and oxygen undergo a redox reaction to generate water and generate electricity. However, during the redox reaction process, part of the nitrogen in the cathode air and the generated water will pass through the proton exchange membrane and enter the anode, resulting in an increase in the concentration of water and nitrogen in the anode, and when the concentration of water and nitrogen in the anode is too high When this occurs, hydrogen starvation in the oxidation-reduction reaction will occur, which in turn will generate a reverse potential to corrode the catalyst on the proton exchange membrane of the fuel cell and shorten t...

Claims

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Application Information

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IPC IPC(8): H01M8/0662H01M8/22H01M8/2465H01M8/2457
CPCH01M8/0662H01M8/22H01M8/2465H01M8/2457Y02E60/50
Inventor 王诗雄史建鹏尚伟华张剑熊洁
Owner DONGFENG MOTOR CORP HUBEI
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