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Fuel cell shutdown purging method, device and system

A fuel cell system, fuel cell technology, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problems affecting the performance of fuel cells, long purging time, etc.

Pending Publication Date: 2021-10-12
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a fuel cell shutdown purging method, device and system to solve the problem of affecting the fuel cell performance caused by too long or too short purging time

Method used

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  • Fuel cell shutdown purging method, device and system
  • Fuel cell shutdown purging method, device and system
  • Fuel cell shutdown purging method, device and system

Examples

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Embodiment Construction

[0029] System embodiment:

[0030] This embodiment provides a fuel cell shutdown purging system, which can figure 1 The fuel cell stack 7 in is purged to take away the liquid water on the cathode side of the fuel cell stack.

[0031] The system includes two purge lines of an air line (including an air supply line and an air outlet line) and a hydrogen line (including a hydrogen supply line and a hydrogen outlet line).

[0032] like figure 1 As shown, the air inlet of the air supply pipeline is provided with a temperature sensor 1 for detecting the outside air, the probe of the temperature sensor 1 can be set inside the pipeline, and an air compressor 2 and a first valve are provided on the air supply pipeline Switch 4; a throttle valve 11 and a first water separator 12 are arranged on the air outlet pipeline. The air compressor 2 cooperates with the throttle valve 11 to take away the liquid water on the cathode side of the fuel cell stack by providing air with a certain flo...

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a fuel cell shutdown purging method, device and system. The method comprises the following steps: firstly, after a fuel cell system is shut down, obtaining theoretical water quantity generated in the working process of a fuel cell; then continuously blowing the fuel cell, carrying out gas-liquid separation on the blown gas, and collecting the actual water amount brought out by blowing; and finally, comparing the theoretical water volume with the actual water volume, and stopping purging until the actual water volume is increased to the theoretical water volume. According to the invention, the purging time can be effectively controlled, the purging time is prevented from being too long or too short, a good storage environment is provided for the fuel cell, and the reduction of the service life of the fuel cell is avoided. The purging time is effectively controlled, the purging time is prevented from being too long or too short, a good storage environment is provided for the fuel cell, and the service life of the fuel cell is prevented from being shortened.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell shutdown purging method, device and system. Background technique [0002] Fuel cell is a power generation device that converts chemical energy in fuel into electrical energy by means of electrochemical reaction. It has the advantages of environmental friendliness, safety, reliability and easy operation. fields. [0003] Among them, the proton exchange membrane fuel cell, as a kind of fuel cell, is equivalent to the reverse device of water electrolysis in principle, and the product of the power generation process is water. Therefore, there is often accumulation of liquid water in the middle and back sections of the battery reaction zone. Therefore, the unreacted fuel gas and the water in the reaction channel need to be purged when the fuel cell system is shut down. [0004] When purging, if the purging time is too short, some liquid water will still a...

Claims

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Application Information

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IPC IPC(8): H01M8/04119H01M8/04223H01M8/04228H01M8/04492
CPCH01M8/04156H01M8/04164H01M8/04223H01M8/04228H01M8/04492Y02E60/50
Inventor 孟德水李维国曹卓涛张龙海蒋尚峰
Owner ZHENGZHOU YUTONG BUS CO LTD
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