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Detection control device and method for ejector and fuel cell system

A technology of detection control and ejector, applied in the direction of fuel cells, circuits, electrical components, etc., can solve the problem of inability to identify potential failures of the ejector

Active Publication Date: 2022-01-21
BEIJING SINOHYTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention aims to provide an injector detection control device, method and fuel cell system to solve the problem that the existing technology cannot identify the injector in the The problem of potential failure during cold start conditions

Method used

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  • Detection control device and method for ejector and fuel cell system
  • Detection control device and method for ejector and fuel cell system
  • Detection control device and method for ejector and fuel cell system

Examples

Experimental program
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Effect test

Embodiment 1

[0058] An embodiment of the present invention provides a detection and control device for an ejector, including a stack, a hydrogen source, hydrogen injectors one and two, an ejector to be tested, hydrogen recovery equipment, and a controller.

[0059] The hydrogen injector is a device that accelerates the gas flow by changing the geometry of the inner wall of the pipe section. It is used at the hydrogen inlet end of the fuel cell to depressurize and speed up the high-pressure hydrogen flow.

[0060] The ejector to be tested is a device that uses a high-speed high-energy flow (liquid flow, air flow or other material flow) to eject another low-speed low-energy flow. jet.

[0061] The hydrogen output from the hydrogen source is transmitted to the hydrogen inlet of the stack through hydrogen injector 2, and the other is transmitted from the nozzle inlet of the injector to be tested to the hydrogen inlet of the stack through hydrogen injector 1; the hydrogen discharged from the s...

Embodiment 2

[0069] To improve on the basis of Embodiment 1, the detection and control device of the injector also includes a water separator, a drain valve, and an exhaust valve, such as Figure 3~4 shown.

[0070] The air inlet of the water separator is connected to the outlet of the electric stack, its gas outlet is connected to the input end of the hydrogen recovery equipment, and its drain is connected to the drain valve; the hydrogen gas outlet of the hydrogen recovery equipment is connected to the diversion gas inlet of the ejector, Its tail gas outlet is connected with the exhaust valve.

[0071] Preferably, the controller further includes a data acquisition unit, a data processing and control unit connected in sequence.

[0072] The data acquisition unit is used to collect in real time the incoming hydrogen pressure of the stack, and the gas pressure at the output end of the hydrogen recovery equipment as the outgoing hydrogen pressure, and send it to the data processing and cont...

Embodiment 3

[0093] The present invention also discloses a detection and control method of the ejector using the detection and control device of the above-mentioned embodiments 1 and 2, which includes the following steps:

[0094] S1. Start the hydrogen injector 1 after receiving the injector detection command from the user;

[0095] S2. Obtain the difference between the hydrogen pressure entering the stack and the hydrogen pressure leaving the stack;

[0096] S3. Judging whether the ejector to be tested is working normally according to the above difference; if it is working normally, output the normal result of the ejector; if it is not working normally, start the hydrogen injector 2, and increase the internal temperature of the ejector to be tested at the same time, again Judging until the ejector under test works normally, output the normal result of the ejector.

[0097] Preferably, the abnormal operation includes icing at the inlet of the diverting gas or icing at the inlet of the no...

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Abstract

The invention provides a detection control device and method for an ejector, belongs to the technical field of fuel cell control, and solves the problem that potential faults of the ejector under a cold start working condition cannot be identified in the prior art. The device comprises an electric pile, a hydrogen source, a hydrogen ejector I, a hydrogen ejector II, an ejector to be tested, hydrogen recovery equipment and a controller. One output path of the hydrogen source is transmitted to a hydrogen inlet of the galvanic pile through a hydrogen ejector II, and the other output path of the hydrogen source is transmitted to the hydrogen inlet of the galvanic pile from a nozzle inlet of the ejector to be tested through a hydrogen ejector I; and hydrogen discharged by the electric pile is fed back to a drainage gas inlet of the ejector to be tested through the hydrogen recovery equipment. After the controller receives an ejector detection instruction, the hydrogen ejector I is started, the difference value of the pressure of hydrogen entering and exiting the reactor is obtained, whether the ejector to be tested works normally or not is judged, and if the ejector to be tested works abnormally, the hydrogen ejector II is started, the temperature of the ejector is increased, and judgment is conducted again till the ejector to be tested works normally. The cold start success rate of the fuel cell is improved.

Description

technical field [0001] The invention relates to the technical field of fuel cell control, in particular to a detection and control device and method for an ejector. Background technique [0002] For the hydrogen circulation system of the fuel cell, during the working process of the fuel cell, the hydrogen supplied to the inlet of the stack is usually excessive. At the entrance of the stack, it reacts after mixing with fresh gas. The ejector is a commonly used key component in the hydrogen circulation system. [0003] At present, there are few applications of the hydrogen backflow scheme of the hydrogen injector + ejector, and there is no potential fault identification method for the ejector under cold start conditions. In the cold start condition, the existing hydrogen backflow scheme, such as patent CN202011231783.6, due to the presence of water vapor in the backflow hydrogen, there is a risk of freezing the ejector, which may cause system failure to shut down or cold sta...

Claims

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Application Information

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IPC IPC(8): H01M8/04664H01M8/0438H01M8/04701H01M8/04992
CPCH01M8/04686H01M8/04425H01M8/04738H01M8/04992Y02E60/50
Inventor 苗田伟赵兴旺李飞强高云庆
Owner BEIJING SINOHYTEC
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