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A kind of anode intermittent venting method of anode closed proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, electrical components, circuits, etc., can solve problems such as reducing the life of membrane electrodes, and achieve the effects of improving service life, avoiding excessive water loss, and avoiding too slow voltage recovery

Active Publication Date: 2021-02-26
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current impurity pulse exhaust method will cause repeated dehydration and dehydration of the membrane, which will easily generate cyclical stress on the membrane electrode system, thereby reducing the life of the membrane electrode.

Method used

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  • A kind of anode intermittent venting method of anode closed proton exchange membrane fuel cell
  • A kind of anode intermittent venting method of anode closed proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In order to better illustrate the solution of the present invention, this embodiment provides a fuel cell, specifically:

[0040] This embodiment provides a fuel cell, such as figure 1 , the fuel cell includes a reaction device and a humidification treatment device, the reaction device includes an electric stack 1 and a hydrogen tank 5, the humidification treatment device is a water vapor generator 4, and the electric stack 1 is before exhaust gas is discharged, and the water vapor generator 4 exchanges protons The membrane provides water vapor over-humidification. One end of the electric stack 1 is provided with an air inlet 2 and an air outlet 3, and the other end is provided with a hydrogen gas inlet pipe 51 and an exhaust gas discharge pipe 7; The circulation pipeline 6 is used for circulating the anode gas.

[0041] In order to control the inflow of gas and the regulation of the gas flow rate, a hydrogen supply control valve 52 is set on the hydrogen gas inlet pi...

Embodiment 2

[0045] Such as figure 1 - Fig. 2, the present embodiment takes the fuel cell provided in embodiment 1 as an example, and provides an anode intermittent exhaust method for an anode closed proton exchange membrane fuel cell, and humidification is provided during the exhaust work process to impurity gas The processing procedure is to monitor the water content of the proton exchange membrane by monitoring the output voltage of the fuel cell, and perform overhumidification treatment on the proton exchange membrane before the exhaust gas is discharged.

[0046] In order to better realize the humidification treatment, the over-humidification treatment also includes the time delay control of exhaust gas discharge. Preferably, the following series of time-delay control actions are performed from the start of exhaust gas discharge:

[0047] When it is detected that the water content of the proton exchange membrane is lower than the preset value, the water vapor supply channel is opened...

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Abstract

The invention provides an anode intermittent exhaust method for an anode closed proton exchange membrane fuel cell. A humidification treatment program is set during the exhaust work process, and the proton exchange membrane is subjected to humidification treatment before the exhaust gas is discharged. The invention solves the problem of repeated water loss and water absorption of the membrane electrode during the intermittent exhaust process of the anode closed proton exchange membrane fuel cell by monitoring the voltage of the system during operation and the closing of several valves, and the voltage drops too fast during the exhaust process. Then the problem of slow recovery.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to an anode intermittent exhaust method for an anode closed proton exchange membrane fuel cell. Background technique [0002] The proton exchange membrane fuel cell with hydrogen and oxygen as the redox reaction gas is currently the most promising fuel cell for commercial application. In order to maximize the utilization rate of the anode gas raw material, the strategy of closing the anode is often adopted, and the hydrogen utilization rate of this utilization method can reach more than 99%. During the actual working process of the fuel cell, non-condensable impurity gases will gradually accumulate on the anode, the main components of which are nitrogen and a small amount of carbon monoxide. After the fuel cell works for a long time, the carbon carrier of the catalytic layer will be corroded to a certain extent, and impurity gases such as carbon monoxide will be generated, which will grad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04089H01M8/04119H01M8/04223H01M8/04492
CPCH01M8/04089H01M8/04126H01M8/04223H01M8/04231H01M8/04492H01M8/04514Y02E60/50
Inventor 肖彪张永张威
Owner GREE ELECTRIC APPLIANCES INC
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