Fuel cell hydrogen circulation system, hydrogen loop control method and hydrogen and water discharging method

A fuel cell and circulation system technology, applied in the direction of fuel cells, fuel cell additives, circuits, etc., can solve the problems of only considering, but not achieving the discharge of gas impurities, ensuring the utilization rate of hydrogen, and not considering the diffusion, so as to reduce the discharge of hydrogen Effect

Active Publication Date: 2020-04-17
CHINA FIRST AUTOMOBILE
View PDF8 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It only considers drainage, and does not consider the diffusion of air-side impurities such as nitrogen to the hydrogen side. At the same time, the control method of th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fuel cell hydrogen circulation system, hydrogen loop control method and hydrogen and water discharging method
  • Fuel cell hydrogen circulation system, hydrogen loop control method and hydrogen and water discharging method
  • Fuel cell hydrogen circulation system, hydrogen loop control method and hydrogen and water discharging method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This embodiment provides a fuel cell hydrogen circulation system (for a schematic diagram of its structure, see figure 1 , the air circuit and the cooling water circuit are not shown in the figure), including the fuel cell stack 1 in the middle, the left inlet is connected to the hydrogen inlet valve 2, and the hydrogen supplied from the outside enters the fuel cell stack 1 through the hydrogen inlet valve 2, and the fuel cell The right outlet of stack 1 is connected to water separator 3, the water outlet of water separator 3 is connected to drain valve 4, the gas outlet of water separator 3 is connected to hydrogen discharge valve 5, and the gas outlet of water separator 3 is connected to hydrogen circulation pump 6 Inlet, the outlet of the hydrogen circulation pump 6 is connected with the hydrogen inlet of the fuel cell stack 1 to form a hydrogen feedback loop. The pipeline between the hydrogen valve 5 is lower than the hydrogen circulation pump 6 and the hydrogen fee...

Embodiment 2

[0060] This embodiment provides a fuel cell hydrogen loop control method, using the fuel cell hydrogen circulation system described in Embodiment 1, by controlling the operation and stop of the hydrogen circulation pump, respectively realizing the two effects of hydrogen circulation and discharging nitrogen to prevent nitrogen accumulation , the state of the fuel cell hydrogen circulation system when the hydrogen circulation pump is running is as follows Figure 2a As shown, the state of the fuel cell hydrogen circulation system when the hydrogen circulation pump stops is as follows Figure 2b As shown, the method includes:

[0061] Turn on the hydrogen circulation pump to make it run, so that hydrogen is discharged from the outlet of the fuel cell stack through the gas outlet of the water separator, and returns to the inlet of the fuel cell stack through the circulation pump (the return direction is indicated in the form of a dotted arrow in the figure).

[0062] Turn off th...

Embodiment 3

[0064] This embodiment provides a fuel cell hydrogen discharge method, using the fuel cell hydrogen circulation system described in Embodiment 1, the method comprising:

[0065] The drainage valve is linked with the hydrogen circulation pump, and the drainage is regulated by changing the speed of the hydrogen circulation pump, the opening period and opening time of the drainage valve;

[0066] The hydrogen exhaust valve is controlled in conjunction with the hydrogen circulation pump and the hydrogen inlet valve. By adjusting the opening frequency of the hydrogen inlet valve, the hydrogen inlet pressure is increased. When the hydrogen circulation pump is shut down, the hydrogen exhaust valve opening cycle and opening time are changed to regulate the hydrogen exhaust;

[0067] Specifically, it is first judged whether the discharge state is abnormal, and then whether the hydrogen discharge state is abnormal.

[0068] In this embodiment, the total number n of single cells is 150, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a fuel cell hydrogen circulation system, a hydrogen loop control method and a hydrogen and water discharging method. The system comprises a fuel cell stack, a hydrogen inlet valve, a water distributor, a hydrogen discharging valve, a water discharging valve and a hydrogen circulating pump, wherein an outlet of the hydrogen inlet valve is connected with a hydrogen inlet of the fuel cell stack; an inlet of the water distributor is connected with an outlet of the fuel cell stack; a gas outlet of the water distributor is respectively connected with an inlet of the hydrogencirculating pump and an inlet of the hydrogen discharging valve; an outlet of the hydrogen circulating pump is connected with a hydrogen inlet of the fuel cell stack to form a hydrogen feedback loop;and a water outlet of the water distributor is connected with an inlet of the water discharging valve through a pipeline; and a pipeline for connecting the gas outlet of the water distributor with theexhaust valve is lower than the hydrogen circulating pump and the hydrogen feedback loop. According to the fuel cell hydrogen loop control method, the two effects of hydrogen circulation and nitrogenaccumulation prevention can be achieved by controlling running and stopping of the hydrogen circulation pump. The hydrogen utilization rate can be increased, and flooding and nitrogen accumulation can be prevented at the same time.

Description

technical field [0001] The invention relates to the technical field of fuel cells, and relates to a fuel cell hydrogen circulation system, a hydrogen loop control method, and a hydrogen discharge and drainage method. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. It has the advantages of high power generation efficiency and less environmental pollution, and has broad application prospects. As the power source of fuel cell vehicles, hydrogen is flammable, explosive, difficult to seal and other problems, so there are certain safety hazards in the hydrogen supply and hydrogen circulation system for fuel cell vehicles. In addition, the flow resistance of the hydrogen system directly affects the power of the fuel cell and the utilization rate of hydrogen fuel. [0003] Some of the existing fuel cell hydrogen loop controls do not consider the util...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M8/04082H01M8/04089H01M8/04119H01M8/04313
CPCH01M8/04089H01M8/04097H01M8/04156H01M8/04201H01M8/04313Y02E60/50
Inventor 黄兴丁天威赵洪辉王宇鹏曲禄成马秋玉都京赵子亮
Owner CHINA FIRST AUTOMOBILE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap