A fast and simple broadband EIS measurement system for Li-Ion batteries

The application of a low-complexity current generator circuit and multisine signals for Electrochemical Impedance Spectroscopy (EIS) of Li-Ion batteries is presented. The proposed system is comprised of a Howland current pump driven by a general-purpose multifunction DAQ, which provides the excitation signal and acquires current and voltage waveforms from the battery under test. The presented results show that the proposed system can provide comparable results with respect to a reference instrument and potentially obtain a reduction in measurement time with respect to a single sine excitation method