Comparison of one and two time constant models for lithium ion battery

Abstract

The fast and accurate modeling topologies are very much essential for power train electrification. The importance of thermal effect is very important in any electrochemical systems and must be considered in battery models because temperature factor has highest importance in transport phenomena and chemical kinetics. The dynamic performance of the lithium ion battery is discussed here and a suitable electrical equivalent circuit is developed to study its response for sudden changes in the output. An effective lithium cell simulation model with thermal dependence is presented in this paper. One series resistor, one voltage source and a single RC block form the proposed equivalent circuit model. The 1 RC and 2 RC Lithium ion battery models are commonly used in the literature are studied and compared. The simulation of Lithium-ion battery 1RC and 2 RC Models are performed by using Matlab/Simulink Software. The simulation results in his paper shows that Lithium-ion battery 1 RC model has more maximum output error of 0.42% than 2 RC Lithium-ion battery model in constant current condition and the maximum output error of 1 RC Lithium-ion battery model is 0.18% more than 2 RC Lithium-ion battery model in UDDS Cycle condition. The simulation results also show that in both simple and complex discharging modes, the error in output is much improved in 2 RC lithium ion battery model when compared to 1 RC Lithium-ion battery model. Thus the paper shows for general applications like in portable electronic design like laptops, Lithium-ion battery 1 RC model is the preferred choice and for automotive and space design applications, Lithium-ion 2 RC model is the preferred choice. In this paper, these simulation results for 1 RC and 2 RC Lithium-ion battery models will be very much useful in the application of practical Lithium-ion battery management systems for electric vehicle applications.

Electrochemical batteries for smart grid applications

“…Schematic view of sodiumsulfur battery is depicted in Figure 6. Applications of these batteries include electric vehicles, stationary applications, aerospace, small load levelling applications, peak shaving for transmission and upgrade deferral [40]. Main benefits of these batteries are long cycle life, high energy and power density and high efficiency.…”

Comparison study of lead-acid and lithium-ıon batteries for solar photovoltaic applications

“…The active components involved in a lithium-ion battery are a negative electrode (cathode) having oxide of the lithiated metal and copper current collector, a positive electrode (anode) having layer structure graphitic carbon and aluminum current collector, electrolyte solution LIPF 6 -EC-DMC (lithium hexafluoro Polyethylene Separator is used to prevent contact between the electrodes. The operation of Lithium-Ion battery and its charging and discharging chemical reactions can be found in [20].…”

Chopper-Based Control Circuit for BESS Integration in Solar PV Grids

“…For the batteries to maintain the same voltage at coupling capacitors, the battery Simulink block voltage parameter was set to 582.5 V. Demand of the utility grid was 100 kW. Minimum voltage to be maintained at coupling capacitor had to match the voltage generated by the PV array, i.e., 500 V. Many battery models are available in the literature [27][28][29][30][31][32][33][34][35][36][37][38][39] but not all of them can be used in simulation because of algebraic loop problem. A generic battery model from the MATLAB SimPower Systems library with appropriate parameters was used for analyzing battery charging and discharging performance [40].…”