Multi-purpose controllable electrochemical impedance spectroscopy using bidirectional DC–DC converter
Journal of Energy Storage
Batteries, Dynamic electrochemical impedance spectroscopy (DEIS), Electrochemical impedance spectroscopy (EIS), Power converters, Robust control
In this paper, we propose a multi-purpose controllable electrochemical impedance spectroscopy (MP-cEIS) device for online and offline battery monitoring and testing during charge and discharge processes. The proposed MP-cEIS device is based on the widely used synchronous buck converter, with a low-cost and simple input filter to provide the bidirectional operation. It also includes a closed-loop feedback system to control the injection of the EIS excitation signal. For the control system design, an average model of the proposed MP-cEIS is derived. Two methods, based on H∞ and quantitative feedback theory (QFT), are presented for the design of a robust controller, which guarantees the stability and tracking of the excitation signal despite model uncertainties. The excitation signal in the proposed MP-cEIS is programmable. The performance of the proposed MP-cEIS is evaluated experimentally, with multi-sine and swept-sine signals, and the results are shown.
Abareshi, Mohammad; Sadeghi, Erfan; Hamzeh, Mohsen; Saif, Mehrdad; and Alavi, Seyed Mohammad Mahdi. (2022). Multi-purpose controllable electrochemical impedance spectroscopy using bidirectional DC–DC converter. Journal of Energy Storage, 55.