Method for lowering peak concentration of exhaust hydrogen of fuel battery system

A fuel cell system, hydrogen technology, applied in fuel cells, fuel cell additives, electrical components, etc., can solve the problems of large hydrogen flow, reduce fuel cell system efficiency, affect fuel cell performance, etc., to reduce the peak hydrogen concentration, The effect of avoiding excessive hydrogen concentration and simple and reliable device structure

Inactive Publication Date: 2013-06-05
上海新源动力有限公司
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Problems solved by technology

However, the anode tail gas with pulse-changing discharge has a large hydrogen flow at the moment of pulse discharge. The air flow rationed to maintain the best working condition of the fuel cell is not e

Method used

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  • Method for lowering peak concentration of exhaust hydrogen of fuel battery system
  • Method for lowering peak concentration of exhaust hydrogen of fuel battery system
  • Method for lowering peak concentration of exhaust hydrogen of fuel battery system

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Embodiment Construction

[0025] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] A method for reducing the peak concentration of hydrogen in tail exhaust of a fuel cell system, the specific steps of the method are:

[0027] 11. Hydrogen slow release step: the air of the fuel cell system passes through the cathode tail outlet and is continuously and stably discharged into the hydrogen slow release chamber through the air guide tube; the hydrogen of the fuel cell system passes through the anode tail outlet and is discharged through the hydrogen guide tube Into the hydrogen slow-release chamber, the air in the hydrogen slow-release chamber is slow-released;

[0028] The hydrogen discharge of the fuel cell system adopts a pulse discharge method or a combination of continuous discharge and pulse discharge;

[0029] The ratio of the volume of the hydrogen slow release chamber to the hydrogen volume disch...

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Abstract

The invention discloses a method for lowering peak concentration of exhaust hydrogen of a fuel battery system, which comprises steps as follows: air of the fuel battery system is continuously and stably discharged into a hydrogen slow release cavity through a cathode exhaust outlet by an air guide tube; hydrogen of the fuel battery system is discharged into a hydrogen slow release cavity through an anode exhaust outlet by a hydrogen guide tube, and is subjected to slow release by the air in the hydrogen slow release cavity; and after the hydrogen is discharged into a mixing cavity from the hydrogen slow release cavity by the slow release gas subjected to slow release, purging air from another way led out by the cathode exhaust outlet of the fuel battery system performs continuous and stable purging on the slow release gas to further lower the concentration of the hydrogen in the slow release gas, and the hydrogen is discharged from a discharge port of the mixing cavity. On the premise of not changing the fuel battery system, the anode exhaust hydrogen, which is discharged by pulses or discharged by combination of continuous discharge and pulse discharge, is buffered, diluted and subjected to purging mixing with cathode gas, thereby lowering the hydrogen to explosion limit below.

Description

technical field [0001] The present invention relates to the exhaust hydrogen technology of vehicle and non-vehicle fuel cell systems, more specifically, it relates to a method for reducing the hydrogen explosion limit of the peak hydrogen concentration in the tail exhaust of fuel cell systems for vehicles and non-vehicles, so as to meet the safety emission requirements Methods. Background technique [0002] As a clean and efficient energy conversion technology, fuel cells have attracted widespread attention in recent years. Among them, the most widely used proton exchange membrane fuel cell is referred to as PEMFC, which uses hydrogen as the anode fuel. The hydrogen utilization rate must generally be controlled within the range of 95%, and the rest is exhausted in the form of pure hydrogen or a mixture of hydrogen and water vapor. Lose. Hydrogen is a flammable and explosive gas, and its explosion limit in air is 4%-74.2%. The hydrogen-air mixture in this range may explode ...

Claims

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Application Information

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IPC IPC(8): H01M8/06H01M8/04
CPCY02E60/50
Inventor 解云马原蔚林业发钱超胡军
Owner 上海新源动力有限公司
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