Method for processing electrochemical impedance spectrum of fuel cell based on characteristic value

A fuel cell and impedance spectrum technology, which is applied in the field of electrochemical impedance spectrum processing, can solve problems such as inability to apply real-time systems and a large amount of calculation, achieve real-time fault diagnosis and reduce complexity.

Pending Publication Date: 2022-08-05
苏州溯驭技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this method cannot be applied to a real-time system, or a system with limited computing power
However, systems using fuzzy and neural networks require deeper knowledge of the fuel cell ontology system to tune the system, or more data to build fuzzy or neural network systems
Moreover, the application of neural networks will also require a large amount of calculation

Method used

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  • Method for processing electrochemical impedance spectrum of fuel cell based on characteristic value
  • Method for processing electrochemical impedance spectrum of fuel cell based on characteristic value
  • Method for processing electrochemical impedance spectrum of fuel cell based on characteristic value

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Embodiment

[0037] like Figure 1 to Figure 5 As shown, a method for processing the electrochemical impedance spectrum of a fuel cell based on eigenvalues ​​includes the following steps:

[0038] Step 1: Obtain the impedance spectrum in the fuel cell;

[0039] Step 2: Obtain eigenvalues ​​in the impedance spectrum;

[0040] Step 3: Establish a benchmark library of operating points-eigenvalues;

[0041] Step 4: Compare the eigenvalues ​​obtained in step 2 with the benchmark eigenvalues ​​established in step 3;

[0042] Step 5: Obtain the absolute value of the difference between the current eigenvalue and the reference eigenvalue;

[0043] Step 6: The result of judging the absolute value is within the threshold range;

[0044] Step 6-1: If the absolute value is within the threshold range, it means that the fuel cell is in a healthy state;

[0045] Step 6-2: If the absolute value of the threshold is within the range, it indicates that the fuel cell is in a fault state.

[0046] In the ...

Embodiment 1

[0060] Based on the above processing method, the present invention can be applied to the offline detection of the fuel cell on the test bench, and can also be applied to the online detection of the fuel cell, using the dc / dc converter of the fuel cell or other special equipment to detect Generate small signal perturbation, the application of these two scenarios such as Image 6 and 7 As shown, the solution proposed by the present invention is a module in the software algorithm that processes and obtains the impedance spectrum. The processing scheme proposed by the present invention is not limited to any application scenarios, but mainly provides a convenient processing scheme for the electrochemical impedance spectrum of the fuel cell, and the electrochemical spectrum can be obtained by those skilled in the art by conventional methods of those skilled in the art. , while there is no restriction on how the chemical spectrum is obtained.

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Abstract

The invention relates to a method for processing an electrochemical impedance spectrum of a fuel cell based on characteristic values. The method comprises the following steps: step 1, obtaining an impedance spectrum in the fuel cell; 2, obtaining a characteristic value in the impedance spectrum; step 3, establishing an operation point-characteristic value reference library; 4, comparing the characteristic value obtained in the step 2 with the reference characteristic value established in the step 3; 5, solving the absolute value of the difference between the current characteristic value and the reference characteristic value; and 6, judging whether the result of the absolute value is within a threshold range or not, and then judging the health state. According to the method, the complexity of processing the electrochemical impedance spectrum of the fuel cell is greatly reduced, the processing efficiency is improved, and the dependence on high-computing-power hardware is reduced.

Description

technical field [0001] The invention relates to the field of internal resistance detection of fuel cells, in particular to a method for processing electrochemical impedance spectrum of fuel cells based on characteristic values. Background technique [0002] The electrochemical impedance spectrum of the fuel cell is obtained by the electrochemical impedance detection process. It is a set of complex impedances at different frequencies, including real and imaginary parts, to form an impedance spectrum curve. The electrochemical impedance spectrum of the fuel cell changes with the internal state of the fuel cell, so it can be applied to the characteristic detection, fault diagnosis and life decay detection of the fuel cell. [0003] Using the obtained impedance spectrum of the fuel cell to determine the internal state of the fuel cell is very important in the application of the fuel cell. At present, the main method of processing the electrochemical impedance spectrum of fuel c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/389
CPCG01R31/367G01R31/389Y02E60/50
Inventor 沈佳斌董震周洪雷董清华
Owner 苏州溯驭技术有限公司
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