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Water management fault diagnosis method for attenuation process of vehicle fuel cell

A fuel cell and fault diagnosis technology, which is applied in the direction of fuel cells, fuel cell additives, fuel cell control, etc., can solve the problems of high cost and complex detection system, achieve the effect of reducing system cost and complexity, and avoiding additional faults

Active Publication Date: 2021-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to the above-mentioned technical problems of complex and high cost of the existing detection system, a water management fault diagnosis method suitable for the attenuation process of vehicle fuel cells is provided

Method used

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  • Water management fault diagnosis method for attenuation process of vehicle fuel cell
  • Water management fault diagnosis method for attenuation process of vehicle fuel cell
  • Water management fault diagnosis method for attenuation process of vehicle fuel cell

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Experimental program
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Effect test

Embodiment 1

[0039] Such as Figure 2-4 As shown, the present invention is applied to a proton exchange membrane fuel cell, the operating temperature of the stack is 60°C, the increasing humidity is 60%RH, and the data collection range of the I-V curve is: 0~1.25A cm -2 The test results obtained under the conditions are shown.

[0040] According to the I-V curve model, the data collected above are curve-fitted, and the result is: E 0 * =1.01138V, J 0 * =0.00056Acm 2 , R * =0.13624Ωcm 2 and J L * =1.34273Acm 2 , the fitting effect is as figure 2 As shown, it can be seen that the experimental data and the fitted data are highly consistent, indicating that the fitted model parameters have high reliability.

[0041] Collect the I-V curve data when the stack is working in real time, the data collection range is: 0~1.25A cm -2 ;

[0042] Calibration value E 0 * 、J L * Bring the I-V curve data of the stack into the I-V curve model, and obtain the real-time internal resistance R ...

Embodiment 2

[0045] Such as Figure 5-7 As shown, the present invention is applied to a proton exchange membrane fuel cell, the operating temperature of the stack is 80°C, the humidity increase is 50%RH, and the data collection range of the I-V curve is: 0.05~1.65A cm -2 The test results obtained under the conditions are shown.

[0046] According to the I-V curve model, the data collected above are curve-fitted, and the result is: E 0 * =0.99957V,J 0 * =0.00096Acm 2 , R * =0.02792Ωcm 2 and J L * =1.69612Acm 2 , the fitting effect is as Figure 5 As shown, it can be seen that the experimental data and the fitted data are highly consistent, indicating that the fitted model parameters have high reliability.

[0047] Collect the I-V curve data when the stack is working in real time, the data collection range is: 0.05~1.35A cm -2 ;

[0048] Calibration value E 0 * 、J L * Bring the I-V curve data of the stack into the I-V curve model, and obtain the real-time internal resistance...

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Abstract

The invention provides a water management fault diagnosis method suitable for an attenuation process of a vehicle fuel cell. The water management fault diagnosis method comprises the following steps: acquiring a calibration I-V curve of a proton exchange membrane fuel cell; obtaining calibration model parameters through curve fitting; acquiring a real-time I-V curve of the fuel cell during working to obtain the real-time internal resistance R and the limit diffusion current density JL of the cell; and judging the battery fault type by comparing the calibration model parameters with the real-time model parameters, and performing fault elimination operation. The method is simple and easy to implement, the influence of battery attenuation on model parameters can be eliminated, additional equipment is not needed, the system cost and complexity are reduced, and additional faults are avoided.

Description

technical field [0001] The invention relates to the technical field of fuel cell fault diagnosis, in particular to a water management fault diagnosis method suitable for the attenuation process of a vehicle fuel cell. Background technique [0002] The proton exchange membrane fuel cell has the advantages of high conversion efficiency, clean and pollution-free, and quick startup at room temperature, and is an ideal vehicle power source. However, in the process of commercialization of proton exchange membrane fuel cells, the stability and reliability of fuel cell systems have become the focus of increasing attention. Fault diagnosis technology aims to monitor the state of the stack in real time, find and eliminate faults in time, and then improve the stability and reliability of the system. The application of this technology is of great significance to the durability, reliability and maintainability of vehicle fuel cell systems. [0003] Proton exchange membrane fuel cells n...

Claims

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Application Information

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IPC IPC(8): H01M8/04298H01M8/04664
CPCH01M8/04305H01M8/04671Y02E60/50
Inventor 邵志刚王朋豪耿江涛何良
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI