Proton exchange membrane fuel cell fault diagnosis method based on rapid impedance spectroscopy measurement

• Main Authors: XU MING, TAO JILI, WU CHENGYU, MA LONGHUA, XIA ZETAO
• Format: Patent
• Language: Chinese; English
• Published: 02.12.2022
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to a proton exchange membrane fuel cell fault diagnosis method based on rapid impedance spectroscopy measurement, and the method employs a DC/DC converter to inject triangular wave current excitation signals with different frequencies into a proton exchange membrane fuel cell, and simplifies a hardware circuit for injecting the current excitation signals. The fault diagnosis technology can be quickly applied to an actual application scene; meanwhile, analysis and feature extraction of the electrochemical impedance spectroscopy of the fuel cell are realized by establishing an equivalent circuit model of the fuel cell; and finally, the working state of the proton exchange membrane can be quickly identified through a support vector machine model based on Bayesian optimization, so that the fault detection time of the fuel cell is effectively shortened, real-time health monitoring and fault diagnosis are realized, relatively good accuracy and robustness are achieved, and the operation stabili