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Shutdown and self-maintenance operation process of liquid fuel cell system

A liquid fuel cell, shutdown technology, applied in the direction of fuel cells, fuel cell additives, circuits, etc., can solve the problems of occupation and implementation difficulty, so as to avoid adverse effects and improve fuel utilization

Active Publication Date: 2013-01-30
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual system, the supply range of gaseous fuel to the anode is very large, which is equivalent to the area of ​​the membrane electrode group. In addition to occupying the volume of the system, the setting of this valve is quite difficult to implement in order to close the diffusion of gaseous fuel in a large range. difficulty

Method used

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  • Shutdown and self-maintenance operation process of liquid fuel cell system
  • Shutdown and self-maintenance operation process of liquid fuel cell system
  • Shutdown and self-maintenance operation process of liquid fuel cell system

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] figure 1 It is a schematic block diagram of a liquid fuel cell system used in a first embodiment of the present invention, in which only a few main components in a general liquid fuel cell system are shown. exist figure 1 Among them, the liquid fuel cell system 100 includes a liquid fuel cell 102 , a cathode gas supply assembly 104 and a control unit 106 . The control unit 106 can control whether the liquid fuel cell 102 is discharged, and can control whether the cathode gas supply assembly 104 supplies gas to the liquid fuel cell 102 . The electricity released by the liquid fuel cell 102 can be stored in a secondary battery or supplied to a load.

[0041] figure 2It is a flowchart of shutdown steps of a liquid fuel cell system according to the first embodiment of the present invention. Please refer to the following figure 2 and can be matched ...

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Abstract

A shutdown and self-maintenance operation process of a liquid fuel cell system is introduced. The liquid fuel cell system gives out a shutdown signal and a liquid fuel cell of the liquid fuel cell system stops discharging when receiving the shutdown signal. Thereafter, a self-maintenance operation consisting of the following four steps will be performed: (a) Supply of the cathode gas is stopped in the liquid fuel cell system. (b) After a first duration, the supply of the cathode gas is started. (c) The liquid fuel cell discharges until the output power of the liquid fuel cell is less than or equal to a first predetermined value. (d) The liquid fuel cell stops discharging and the supply of the cathode gas is stopped again. The (a) to (d) four steps are repeated several times before the liquid fuel cell system is completely stopped.

Description

technical field [0001] The present invention relates to the operation of a fuel cell, and more particularly to a method of shutdown and self-maintenance operation of a liquid fuel cell system. Background technique [0002] Fuel cells are an option currently being used to replace traditional energy sources. Fuel cells can be basically divided into gas fuel cells and liquid fuel cells according to fuel. Among them, the direct methanol fuel cell (DMFC) belongs to the most attention-grabbing liquid fuel cell at present, which directly uses methanol aqueous solution as a fuel supply source, and generates electric current through the relevant electrode reaction of methanol and oxygen. [0003] When the direct methanol fuel cell system is shut down, there will still be methanol fuel remaining at the anode end. As far as the flow channel of the bipolar plate is concerned, the traditional method is to stop the supply of anode fuel after shutdown and continue to provide cathode air f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04
CPCH01M8/04H01M8/04186H01M8/04223Y02E60/50H01M8/04228H01M8/04303
Inventor 康顾严戴椿河刘静蓉凌守弘周崇仁蔡英文
Owner IND TECH RES INST