Equivalent Circuit Model for High-Power Lithium-Ion Batteries under High Current Rates, Wide Temperature Range, and Various State of Charges

The most employed technique to mimic the behavior of lithium-ion cells monitor and control them is equivalent circuit model (ECM). This modeling tool should be precise enough ensure system’s reliability. Two significant parameters that affect accuracy ECM are applied current rate operating temperature. Without a thorough understating influence these on ECM, parameter estimation carried out manually within calibration, which not favorable. In this work, an enhanced was developed for high-power capacitors (LiC) wide temperature range from freezing −30 °C hot +60 with rates 10 A 500 A. context, experimental tests were LiC by two RC branches. branches, resistance capacitance (RC) required maintain precision model. validation results proved semi-empirical second-order can estimate electrical thermal high accuracy. when less than 150 A, error lower 3%. Additionally, demanded power high, in above simulation 5%.