The paper proposes a novel Electrochemical Impedance Spectroscopy methodology that takes into account the nonlinearties present in the battery. For this purpose, the current-voltage relationship of the cell is modeled in discrete domain as a Volterra filter and the linear part of the nonlinear model is efficiently estimated using Orthogonal Periodic Sequences. Preliminary experimental results involving six lithium-ion cells show the soundness of the proposed approach also in comparison with the classical method.
Introducing an Electrochemical Impedance Spectroscopy Methodology based on Volterra Filters / Orcioni, Simone; Carini, Alberto; Mauri, Alessandro; Giosue', Chiara; Marchese, Daniele; Conti, Massimo. - (2023), pp. 1-5. (Intervento presentato al convegno 2023 IEEE International Symposium on Circuits and Systems (ISCAS) tenutosi a Monterey, CA, USA nel 21-25 May 2023) [10.1109/ISCAS46773.2023.10182139].