Adapting RC Model of Lithium-ion Battery for e-mobility
Battery modeling is an emerging area to explore in the field of electric vehicle batteries, however various circuit models have been proposed with higher degree of complexity. It is hard to simulate dynamic characteristics of batteries using simple circuit models and at the same time implementation of real time systems using complex model is tedious. With the help of battery models it is very essential to measure precisely the behavior of the battery together with battery current, voltage, SOC and temperature. The most commonly used battery models are Mathematical Model, Data-driven Model, Equivalent Circuit Model (ECM) and Electro-chemical Model. ECM gains the importance in electric vehicle battery modeling. The literatures available on ECM explain about first and second-order RC modeling widely, but for simulating highly transient processes ECM up to five RC models or even RC model with constant phase elements (CPEs) are challenging. This paper analyses the three RC modeling through simulation and comparing the findings with experimental data through Electro-chemical test to find out the impedance at wide frequency spectra. BMS application can further leverage this model outcome.