The thesis presents a comparison of different systems for measuring electrochemical impedance spectroscopy (EIS) for the characterization of lithium-ion batteries. Laboratory measurement systems and more cost-effective systems are compared. Measurements were performed at different states of charge of the battery, and the results were presented and analyzed using Nyquist and Bode plots. The accuracy, stability, and comparability of the results obtained with individual measurement systems, as well as their limitations in the characterization of battery cells, were evaluated. Based on the comparison, the suitability of more cost-effective EIS systems for wider use in the characterization of lithium-ion batteries was assessed. Particular attention was also paid to the influence of changes in the battery's state of charge on the EIS measurement results.
|
