Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Continuous Time and Discrete Time State Equation Analysis about Electrical Equivalent Circuit Model for Lithium-Ion Battery
Authors Seungyun Han ; Jinhyeong Park ; Seongyun Park ; Seungwoo Kim ; Pyeong-Yeon Lee ; Jonghoon Kim
DOI 10.6113/TKPE.2020.25.4.303
Page pp.303-310
ISSN 1229-2214
Keywords State of charge estimation; Extended kalman filter; Continuous-time state equation; Discrete-time state equation; Electrical equivalent circuit model
Abstract Estimating the accurate internal state of lithium ion batteries to increase their safety and efficiency is crucial. Various algorithms are used to estimate the internal state of a lithium ion battery, such as the extended Kalman filter and sliding mode observer. A state-space model is essential in using algorithms to estimate the internal state of a battery. Two principal methods are used to express the state-space model, namely, continuous time and discrete time. In this work, the extended Kalman filter is employed to estimate the internal state of a battery. Moreover, this work presents and analyzes the estimation performance of algorithms consisting of a continuous time state-space model and a discrete time state-space model through static and dynamic profiles.