Simple Analytical Method for Determining Parameters of Discharging Batteries

A survey of mathematics-based equivalent-circuit and electrochemical battery models for hybrid and electric vehicle simulation

“…Here R s is the series resistance that models the instantaneous change in voltage with respect to current, and the R i C i parallel pairs, where i ∈ {1, .., N }, model the exponentially decaying time-dependent variation of voltage with respect to current. The circuit component values can be found using pulse discharge analysis [24,27,31,33,45,46], or parameter identification techniques [29,30,36]. Variations on this parallel-RC model are the most common circuit models encountered by the authors.…”

“…Kim and Qiao [45] apply a least-squares method to this pulse-discharge technique. Hu et al [46] apply an algebraic simplification to the non-linear battery equations to ease the identification of circuit components from pulse discharge data.…”

A Review of Approaches for the Design of Li-Ion BMS Estimation Functions

“…But care has to be taken because of high current pulses that are out of the model range of application. In order to adapt equivalent circuit models to automotive applications, a circuit parameters dependence on SOC [29][30][31], temperature and the amplitude of applied current can be fitted. Moreover, to reach the precision required for BMS applications, it may be necessary to use a more complex electric network than the one shown in Figure 1.…”

State of Health estimation for NCA-C Lithium-ion cells

“…Lithium-ion batteries have recently emerged as the standard electric power source for electrified vehicles, such as plug-in hybrid-electric vehicles (PHEV), electric vehicles (EV), and hybrid electric vehicles (HEV) [Chaturvedi et al, 2010, Hu et al, 2011. In this domain, to correctly manage the battery charge level and, as a consequence, the vehicle range, the battery capacity, i.e.…”