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Method for processing frostbite prevention and quick startup of hydrogen stack

A processing method and technology of hydrogen stack, applied in circuits, fuel cells, electrical components, etc., can solve problems such as environmental adaptability gaps

Inactive Publication Date: 2007-12-05
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above technologies have provided a certain solution for antifreeze technology or quick start, but there is still a gap with practical applications in terms of energy efficiency, unified solutions to the above two types of technical problems, and environmental adaptability.

Method used

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  • Method for processing frostbite prevention and quick startup of hydrogen stack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The hydrogen stack has a fuel hydrogen circulation loop and an oxidant loop. This example takes the hydrogen gas circuit as an example, and the oxidant circuit is similar to this. Refer to Figure 1 for the structure, and refer to the accompanying drawings for the meanings of the symbols.

[0021] When shutting down, for the hydrogen stack 12, the gas is first circulated through the circulation pump 6, free water in the system is purged, and separated in the water separator 12. Then or at the same time, the hydrogen stack 12 outputs electric energy to consume the hydrogen in the circulation system. Electric energy can be exported to the battery, or directly heat the gas heater (not shown in the figure).

[0022] For the high-pressure system, when the pressure is reduced to close to the ambient pressure, an inert gas, such as nitrogen, is introduced, and the pressure of the control system is slightly higher than the ambient pressure. The nitrogen is provided by the nitro...

Embodiment 2

[0031] Embodiment 2 is shown in Figure 2. Wherein the hydrogen source 2 reaches the wet exchanger I or II through the valve 4, the pipeline, and the switching valve 7. The nitrogen source 2 is controlled by the valve 5 and can directly reach the hydrogen stack 12 through the pipeline. The working gas from the hydrogen stack goes through the pipeline to the water separator 17. If the gas contains liquid water, the gas and liquid are separated in the water separator. If the gas needs to be discharged, the switching valve 18 is used to discharge the gas to the tail gas processed in Processor 3. There is a drain valve (not shown in the figure) at the bottom of the water distributor, and the liquid water is under the control of the system, through the valves 13, 14, 15, and the pump 16 is used to selectively inject the wet exchanger I, II or other water devices including exhaustion. to the outside world.

[0032] Others are similar to Example 1.

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Abstract

The invention relates to a processing method of preventing frostbite and restarting of hydrogen electric pile, whose characteristic lies in the treating processes includes: When the electric pile turns off, the unsaturated fuel gas or the nitrogen, through the circle boast to clean the dissociate water; drying the MEA film module to keep the water content below the stipulated temperature which does not ice up; then the recycle gas through a wet exchanger to dry and the dried gas is continue used in the dry pile step; when restarting the electric pile, the recycle gas must heats then through the pile to elevate the temperature, then heats the fuel gas and the oxidant of the gas source, through the weting of the wet exchanger enters to the calefactive pile, enhances the wet step of the film module in the pile, starts the power output of the pile. Enters the operating procedure control of the pile after starting the pile power output.

Description

technical field [0001] The invention mainly relates to the winter antifreeze and quick start of the hydrogen proton exchange membrane fuel cell. Background technique [0002] For the antifreeze and quick start of the hydrogen proton exchange membrane fuel cell stack whose ambient temperature is below freezing point, there are various heating and humidification technical solutions. The present invention only provides technical methods for two aspects of antifreezing of the fuel channel and the oxidant channel and heating and humidification during startup, and does not consider the problem of the cooling system. For a hydrogen proton exchange membrane fuel cell, the present invention is referred to as a hydrogen battery for short; for a hydrogen proton exchange membrane fuel cell stack, the present invention is referred to as a hydrogen stack for short. The water combined with the membrane on the exchange membrane is referred to as bound water, and the other water in the hydr...

Claims

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Application Information

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IPC IPC(8): H01M8/04H01M8/10H01M8/24H01M8/04119H01M8/04225H01M8/04228
CPCY02E60/521Y02E60/50
Inventor 高世萍
Owner DALIAN POLYTECHNIC UNIVERSITY
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