Kinetic model for improved dynamic current response in lithium-ion battery electrical circuit models

Abstract Lithium-ion batteries are used in a wide range of applications today. With that in mind, it is crucial to create accurate models for simulations of cell behavior under various circumstances. In this work, a 2RC electrical battery model of lithium-ion battery was developed and was enhanced by a kinetic battery model for improved accuracy in dynamic behavior. By implementing the kinetic battery model into the 2RC electrical battery model, the root-mean-square-error was reduced by 3.9 mV in average in the driving profiles and on average by 10.1 mV in the dynamic discharge performance test. The developed models are designed and validated to operate in the temperature range −5 °C–45 °C. Graphical abstract