Rapid Electrochemical Impedance Spectroscopy via, Continuous Amplitude Envelope of Chirp Signal on, Li-ion 21700 battery

This paper compares the conventional Electrochemical Impedance Spectroscopy (EIS) and the Chirp-based EIS methodologies in nonlinear Lithium-ion battery impedance spectrum simulation. Utilizing a Doyle-Fuller-Newman (DFN) model with specific parameters for LGM50 21700 Li-Ion Battery, the study emphasizes not only the accuracy but also the operational speed of the two techniques. It was observed that the Chirp-based EIS method substantially reduces the measurement time by a factor of 5, compared to the conventional EIS method for the frequency range of 0.01 Hz to 10
³
Hz in galvanostatic mode. In addition, the sampling rate used in the Chirp-based EIS method can be achieved practically using function generators or comparable electronic tools. This indicates an option for an effective battery prognosis. The research proposes that employing the Chirp-based EIS technique can potentially transform how EIS is carried out, greatly improving its practicality for battery management systems.