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A fuel cell anode drainage device and drainage system

A fuel cell and drainage device technology, which is applied to fuel cell additives, battery electrodes, electrolyte treatment of solid electrolyte batteries, etc., can solve the problems of no condensation effect, insufficient water separation effect, insufficient hydrogen transfer, etc., and achieve drainage effect. Good, compact structure, timely drainage effect

Active Publication Date: 2022-08-05
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

However, for the alkaline membrane fuel cell, since the anode produces water, its water production is much larger than that of the anode of the PEMFC, especially the anode of the alkaline membrane fuel cell needs to control the relative humidity of the anode hydrogen inlet and outlet of the stack to make the anode water quickly. discharge, while the traditional traditional centrifugal water separator has no condensation effect, and the water separation effect is not enough to meet the drainage needs
If the excess water in the hydrogen circulation pipeline cannot be discharged in time, the excess water will cover the catalyst during the electrochemical reaction, so that the hydrogen cannot be fully transferred to the surface of the catalyst

Method used

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  • A fuel cell anode drainage device and drainage system

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Effect test

Embodiment 1

[0025] like figure 1 As shown, the present invention provides a fuel cell anode drainage device. The drainage device includes a drainer and a return pump sequentially arranged between the hydrogen outlet 2 and the hydrogen inlet 13 of the fuel cell; the drainer is sequentially provided with a hydrogen chamber I3, a sealant I, a water chamber 5, a sealant II, and a hydrogen chamber along the hydrogen flow direction. II6, the hydrogen chamber I3 and the hydrogen chamber II6 are connected by the hollow fiber bundle 7, the hollow fiber bundle 7 has the function of water permeability and gas resistance when there is a pressure difference in the wet state, and the two ends of the hollow fiber bundle 7 pass through the sealant and are open The sealant I isolates the hydrogen chamber I3 and the water chamber 5; the sealant II isolates the hydrogen chamber II6 and the water chamber 5; the hydrogen chamber I3 is provided with a hydrogen inlet 3, which is connected with the hydrogen outl...

Embodiment 2

[0028] The same drainage device as in Example 1 was used. When the system is working, the operating temperature of the alkaline anion exchange membrane fuel cell is 90 °C, the anode hydrogen pressure is 0.2 MPa gauge pressure, and the operating current density is 400 mA / cm 2 , the return pump is a hydrogen circulation pump, and the rotation speed of the circulation pump is 3500 rpm. The outlet of the stack is hydrogen with saturated steam and liquid product water at a temperature of 70°C. After passing through the drain, the hydrogen is pressurized by the return pump, and enters the fuel cell stack together with the hydrogen from the hydrogen source. The cooling water temperature is 40°C and the pressure is normal pressure. The condensed water in the circulating hydrogen of the stack anode and the liquid water together penetrate the wall of the hollow fiber tube and enter the circulating water under the pressure difference of 0.2 MPa to realize the anode drainage. Before dra...

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Abstract

The invention discloses a fuel cell anode drainage device and a drainage system, which combine the condensation of water vapor in hydrogen and the discharge of liquid water through the drainage and gas barrier properties of a hollow fiber membrane, and use low-temperature cooling water to control anode hydrogen The dew point can achieve the effect of fast and efficient drainage, and at the same time, it has the advantages of compact structure, simple and reliable. The invention solves the problem of anode drainage of the alkaline membrane fuel cell, and has application prospects in promoting the engineering application of the alkaline membrane fuel cell stack.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cell anode drainage device and a drainage system, and in particular to fuel cell anode water management. Background technique [0002] Different from the proton exchange membrane fuel cell, the alkaline anion exchange membrane fuel cell generates water at the anode, and the product water needs to be swept or carried out from the diffusion layer by hydrogen, which requires the hydrogen to have a large circulation ratio and the water content of the inlet and outlet hydrogen. The difference is large, that is, the anode has a strong drainage capacity. [0003] The existing anode water management is usually developed for PEMFC, and the liquid water content of the PEMFC anode itself is small. Usually, a hydrogen circulation pump or an ejector is used to circulate the hydrogen in the anode, and a centrifugal separator is added to the hydrogen circulation pipeline. The water s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04291
CPCH01M8/04291H01M2004/8684Y02E60/50
Inventor 谢峰周亚文李新俞红梅邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI