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Device and method for detecting and controlling leakage of humidifier of fuel cell

A detection control and fuel cell technology, applied in fuel cells, electrochemical generators, circuits, etc., can solve the problems of fuel cell humidifier leakage, inaccurate prediction of humidifier leakage, and inability to adaptive control.

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

[0005] The embodiment of the present invention aims to provide a detection and control device for the leakage of a fuel cell humidifier, which is used to solve the inaccurate and inaccurate prediction of the leakage of the humidifier in the prior art. The problem with adaptive control

Method used

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  • Device and method for detecting and controlling leakage of humidifier of fuel cell
  • Device and method for detecting and controlling leakage of humidifier of fuel cell
  • Device and method for detecting and controlling leakage of humidifier of fuel cell

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Experimental program
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Effect test

Embodiment 1

[0060] One embodiment of the present invention discloses a fuel cell humidifier leakage detection and control device, such as figure 1 As shown, including flow meter, air compressor, intake throttle, exhaust throttle, electric stack and controller.

[0061] The external air passes through the flow meter, the air compressor, the intake throttle, and the humidifier to be tested into the air inlet of the electric stack in turn; the gas discharged from the exhaust port of the electric stack passes through the humidifier to be tested, the exhaust The valve is output to the outside of the vehicle; the input end of the controller is connected to the output end of the flowmeter, and its output end is respectively connected to the control ends of the air compressor, intake throttle, exhaust throttle, and electric stack.

[0062] There are two independent gas channels in the humidifier to be tested, one is used to deliver the stack air into the stack, and the other is used to output th...

Embodiment 2

[0072] Based on the optimization of the device described in Embodiment 1, the controller further includes a data acquisition unit, a data processing and control unit connected in sequence. It should be noted that the output end of the flow meter is also connected with the input end of the data processing and control unit.

[0073] The data acquisition unit is used to obtain the real-time high-frequency impedance of the electric stack, the respective air pressures of the air inlet and the air outlet of the electric stack, and send them to the data processing and control unit.

[0074] The data processing and control unit is used to start the air compressor, intake throttle, and exhaust throttle after receiving the humidifier detection instruction from the user, perform shutdown and purge on the stack, and monitor the stack during the purge process. The real-time high-frequency impedance, until the high-frequency impedance is greater than or equal to the preset threshold, stop t...

Embodiment 3

[0110] An embodiment of the present invention also discloses a method for detecting and controlling leakage of a fuel cell humidifier corresponding to the device described in Embodiments 1 and 2, comprising the following steps:

[0111] S1. After receiving the humidifier detection instruction from the user, perform shutdown and purge on the stack;

[0112] S2. Monitor the real-time high-frequency impedance of the stack during the purging process until the high-frequency impedance is greater than or equal to the preset threshold, and obtain the air pressure difference between the air inlet and the gas outlet of the stack when the flowmeter is at the target flow rate;

[0113] S3. Determine whether the humidifier under test leaks according to the air pressure difference, and if it leaks, correct the target flow rate according to the air pressure difference, and use the corrected target flow rate as the working index of the flowmeter when the stack is normally powered.

[0114] P...

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Abstract

The invention provides a device and method for detecting and controlling leakage of a humidifier of a fuel cell, belongs to the technical field of fuel cell humidifier detection, and solves the problems of inaccurate leakage prediction and incapability of self-adaptive control of a humidifier in the prior art. The device comprises a flow meter, an air compressor, an air inlet throttle valve, an exhaust throttle valve, an electric pile and a controller; the input end of the controller is connected with the output end of the flow meter, and the output end of the controller is respectively connected with the control ends of the air compressor, the air inlet throttle valve, the exhaust throttle valve and the electric pile. The controller is used for performing shutdown purging on the galvanic pile after receiving a humidifier detection instruction, monitoring the real-time high-frequency impedance of the galvanic pile in the purging process until the high-frequency impedance is greater than or equal to a preset threshold value, obtaining the air pressure difference between an air inlet and an air outlet of the galvanic pile when the flow meter is at the target flow, judging whether the humidifier to be detected leaks or not, and if the humidifier to be detected leaks, and correcting the target flow according to the air pressure difference. Online automatic monitoring and self-adaptive control of the humidifier are realized.

Description

technical field [0001] The invention relates to the technical field of fuel cell humidifier detection, in particular to a method for detecting and controlling the leakage of a fuel cell humidifier. Background technique [0002] Hydrogen fuel cell vehicles are new energy vehicles with broad development prospects, which have many advantages such as short hydrogenation time and long driving range. A fuel cell system usually includes a fuel cell stack and peripheral hydrogen, air, cooling and other component systems. The stack includes a proton exchange membrane, a catalyst layer, a gas diffusion layer, a bipolar plate, etc., and the proton exchange membrane needs to be kept at a suitable humidity. It maintains good performance in the dry state. If it is too dry, it will cause the proton conduction resistance to increase and the performance to decline. [0003] Generally, a fuel cell engine uses a high-temperature and high-humidity exhaust air to humidify low-humidity air intak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0438H01M8/04537H01M8/04664H01M8/04746H01M8/04119G01M3/26
CPCH01M8/04432H01M8/04395H01M8/04649H01M8/04686H01M8/04753H01M8/04141G01M3/26Y02E60/50
Inventor 赵兴旺盛有冬高云庆渠海洋李飞强
Owner BEIJING SINOHYTEC
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