| 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 |
| 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. |