Abstract
Electrochemical impedance spectroscopy or ac impedance methods are popularly used for the diagnosis of electrochemical generators (batteries or fuel cell). It is now possible to acquire and quantitatively interpret the experimental electrical impedances of such systems, whose evolutions indirectly reflect the modifications of the internal electrochemical process. The scope of these measurement methods is to identify the frequency response function of the system under test by applying a small signal perturbation to the system input, and measuring the corresponding response. Once identified, and according to the application, frequency response functions can provide useful information about the characteristics of the system. Classical EIS consists in applying a set of frequency-controlled sine waves to the input of the system. However, the most difficult problem is the integration of this type of measuring device in embedded systems. In order to overcome this problem, we propose to apply squared pattern excitation signals to perform such impedance measurements. In this paper, we quantify and compare the performance of classical EIS and the proposed broadband identification method applied to a well-known impedance circuit.
Highlights
Electrochemical Impedance Spectroscopy (EIS) [1] has revealed its importance and value through several applications
We focus on squared pattern signals and evaluate their performance relative to those of the classical EIS
It is compared with the estimated electrical impedances in order to evaluate the quality of the three identification methods through a statistical study
Summary
Electrochemical Impedance Spectroscopy (EIS) [1] has revealed its importance and value through several applications. [6] aims to identify biological impedance while [7] and [8] work on battery impedance measurements. [6], [7] and [8] investigate identification methods based on broadband signals. These methods have a number of advantages over classical EIS. It requires the application of a short broadband signal [9] [10], and allows the measurement of impedances over a frequency band
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.