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Lookup NU author(s): Dr Cheng Chin,
Professor Ehsan Mesbahi
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Lithium Iron phosphate battery has obtained extensive attention of researchers for its high energy density, little contamination and ready availability. In this paper, different numbers of RC branches in the equivalent Thevenin circuit model are explored by comparing accuracy of curve fitting with in-house experimental data. Besides, battery system with 6 cells of second order equivalent circuit is modeled using Matlab/Simscape. A multirate strong tracking extended filter (MRSTEKF) is proposed by introducing the multirate control strategy and lifting technology into strong tracking extended Kalman filter (STEKF) to improve tracking stability and estimation precision of state of charge (SOC). Root mean square error (RMSE) is exploited to evaluate the performance of the algorithms of extended Kalman filter (EKF), STEKF and MRSTEKF. Simulation results demonstrate that the proposed MRSTEKF is faster than EKF and STEKF by 55.34% and 49.51%, and is more precise by 52.66% and 33.88%.
Author(s): Jia J, Lin P, Chin CS, Toh WD, Gao Z, Lyu H, Cham YT, Mesbahi E
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: IEEE 11th International Conference on Power Electronics and Drive Systems (PEDS 2015)
Year of Conference: 2015
Online publication date: 17/08/2015
Acceptance date: 01/04/2015
Library holdings: Search Newcastle University Library for this item
Series Editor(s): Yung C. Liang, National University of Singapore