A parameter adaptive method for state of charge estimation of lithium-ion batteries with an improved extended Kalman filter.

ABSTRACT: An accurate state of charge (SOC) estimation in battery management systems (BMS) is of crucial importance to guarantee the safe and effective operation of automotive batteries. However, the BMS consistently suffers from inaccuracy of SOC estimation. Herein, we propose a SOC estimation approach with both high accuracy and robustness based on an improved extended Kalman filter (IEKF). An equivalent circuit model is established, and the simulated annealing-particle swarm optimization (SA-PSO) algorithm is used for offline parameter identification. Furthermore, improvements have been made with noise adaptation, a fading filter and a linear-nonlinear filtering based on the traditional EKF method, and rigorous mathematical proof has been carried out accordingly. To deal with model mismatch, onli

SUBMITTER: Yang S 

PROVIDER: S-EPMC7952569 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature