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A fuel cell device system and control method

A technology of fuel cells and control methods, which is applied in fuel cells, circuits, electrical components, etc., and can solve the problems of not considering liquid water discharge, not considering freezing at too low temperature, etc.

Active Publication Date: 2021-10-08
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent document only considers the water vapor discharged from the stack, and does not consider the discharge of liquid water, nor does it consider the possible freezing when the temperature is too low, nor does it consider the possible freezing of the water storage chamber and the drain valve.

Method used

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  • A fuel cell device system and control method
  • A fuel cell device system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a fuel cell device system, which includes an air compressor 1, an intercooler 2, a fuel cell stack 3, and a hydrogen-air mixing chamber 4. The outlet of the air compressor 1 passes through the first The pipeline is connected with the air inlet 31 of the intercooler 2 and the fuel cell stack 3 in turn; the outlet of the air compressor 1 is connected to the hydrogen-air mixing chamber 4 through the second pipeline (that is, the outlet branch of the air compressor) 5 connected to the first inlet, and the second pipeline 5 is provided with a flow bypass valve 51;

[0049] The outlet 32 ​​of the air path of the fuel cell stack is connected to the second inlet of the hydrogen-air mixing chamber 4 through an air discharge pipeline. An air path back pressure valve 6 is arranged on the air discharge pipeline. The discharge port 33 is connected to the third inlet of the hydrogen-air mixing chamber 4 through a hydrogen discharge pipeline, and the hydrogen ...

Embodiment 2

[0052] This embodiment provides a fuel cell device system, which includes an air compressor 1, an intercooler 2, a fuel cell stack 3, and a hydrogen-air mixing chamber 4. The outlet of the air compressor 1 passes through the first The pipeline is connected with the air inlet 31 of the intercooler 2 and the fuel cell stack 3 in turn; the outlet of the air compressor 1 is connected to the hydrogen-air mixing chamber 4 through the second pipeline (that is, the outlet branch of the air compressor) 5 connected to the first inlet, and the second pipeline 5 is provided with a flow bypass valve 51;

[0053] The outlet 32 ​​of the air path of the fuel cell stack is connected to the second inlet of the hydrogen-air mixing chamber 4 through an air discharge pipeline. An air path back pressure valve 6 is arranged on the air discharge pipeline. The discharge port 33 is connected to the third inlet of the hydrogen-air mixing chamber 4 through a hydrogen discharge pipeline, and the hydrogen ...

Embodiment 3

[0055] This embodiment provides the control method of the fuel cell device system as described in Embodiment 1, and the method includes the following steps:

[0056] First, use the icing sensor to judge whether there is only gas in the hydrogen discharge pipe, and the result is not only gas;

[0057] Secondly, use the icing sensor to judge whether there is solid ice in the hydrogen exhaust pipe. If there is no solid ice, then there is liquid water in the pipe. At this time, control the drain valve to open once immediately, and extend the opening time of the drain valve to t 1 , t 1 >Preset drainage time, for example, the preset drainage time is 1s, t 1 1.5s, the drainage period T 1 No change, T 1 =The preset drainage period, for example, 20s, it can be judged that the previously scheduled drainage period is not enough to ensure proper drainage every time.

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Abstract

The invention discloses a fuel cell device system and a control method. The fuel cell device system includes an air compressor, an intercooler, a fuel cell stack and a hydrogen-air mixing chamber. The outlets of the air compressors pass through first pipelines in sequence. It is connected to the air inlet of the intercooler and the fuel cell stack; it is connected to the first inlet of the hydrogen-air mixing chamber through a second pipeline, and the second pipeline is provided with a flow bypass valve; the air outlet of the fuel cell stack is discharged through air The pipeline is connected to the second inlet of the hydrogen-air mixing chamber, the air discharge pipeline is provided with a back pressure valve, the hydrogen discharge port of the fuel cell stack is connected to the third inlet of the hydrogen-air mixing chamber through the hydrogen discharge pipeline, and the hydrogen discharge pipeline The road is provided with an icing detection device and a drain valve in sequence along the direction away from the fuel cell stack, the hydrogen path drain valve is located inside the hydrogen-air mixing chamber, and the hydrogen-air mixing chamber is provided with an outlet. Solved the problem of diagnosing whether there is accumulated water or icing in the discharge line of the hydrogen circuit, as well as avoiding freezing and de-icing.

Description

technical field [0001] The invention relates to the technical field of fuel cells, and relates to a fuel cell device system and a control method, in particular to a fuel cell device system and a control method with a hydrogen channel drainage antifreeze structure. Background technique [0002] Some existing drainage and antifreeze structures for hydrogen channels only consider purging or control methods in which water remains in a gaseous or liquid state, while ignoring the fact that it has already frozen. Consider the situation of icing. Although icing is considered in some papers, the form of electric heating is used, and it is not mentioned how to judge whether it has frozen or is still in the state of liquid water; in the actual test process, it is most likely to freeze The most important part is the pipeline of the discharge port of the hydrogen circuit and the drain valve of the hydrogen circuit, because unlike the air circuit, there is relatively high temperature comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04223H01M8/04119H01M8/04664
CPCH01M8/04156H01M8/04253H01M8/04679Y02E60/50
Inventor 黄兴赵子亮丁天威赵洪辉王宇鹏曲禄成马秋玉都京段盼郝志强
Owner CHINA FIRST AUTOMOBILE