Batteries, Vol. 7, Webpages 76: A Method for the purpose of Monitoring State-of-Charge of Lithium-Ion Cells Using Multi-Sine Indication Excitation
Batteries doi: 10. 3390/batteries7040076
Authors: Jonghyeon Betty Julia Kowal
In this paper, a method designed for monitoring SoC of the lithium-ion battery cell through constant impedance measurement during cellular operation is introduced. The multi-sine signal is used to the cell working current, and the cell SoH and SoC may be simultaneously monitored via impedance each and every frequency. In contrast to existing studies in which cell impedance measurement is definitely performed ex situ via EIS equipment, cell state estimation is performed inside situ. The measured impedance takes into account cell temperature plus cell SoH, enabling accurate SoC estimation. The dimension system configured for the particular experiment and considerations just for the selection of measurement parameters are described, and the accuracy of cell SoC estimation is presented.