Improved sliding mode observer-based SOC estimation for lithium battery

2019 ◽  
Author(s):  
Hongfei Zhang ◽  
Zhumu Fu ◽  
Fazhan Tao
Keyword(s):  
Lithium Battery ◽  
Sliding Mode ◽  
Sliding Mode Observer ◽  
Soc Estimation

scholarly journals A New Double Sliding Mode Observer for EV Lithium Battery SOC Estimation

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Qiaoyan Chen ◽  
Jiuchun Jiang ◽  
Haijun Ruan ◽  
Caiping Zhang
Keyword(s):  
Sliding Mode ◽  
Internal Resistance ◽  
Sliding Mode Observer ◽  
Working Process ◽  
First Order ◽  
Soc Estimation ◽  
Battery Model ◽  
Ohmic Resistance ◽  
Remaining Capacity ◽  
Double Observer

A new sliding mode observer is proposed in this paper; compared with the existing sliding mode observer used for SOC estimation, the new observer has the advantages of simple design and good generality. The robustness of the new observer was proved by Lyapunov stability theorem. Taking the first-order Randle circuit model of the battery as an example, the new sliding mode observer was designed. Battery test was done with the simulated FUDS condition, and the robustness of the new observer was verified by the test. Because battery internal ohmic resistance is changing in battery working process, which has a significant effect on SOC estimation, a new double sliding mode observer was designed to identify the internal resistance. The tests results show that the battery internal ohmic resistance changes greatly when the SOC is low and the double observer can accurately identify the resistance which improves the accuracy of the battery model. The results also show that the new double observer is robust and can improve the precision of SOC estimation when the battery remaining capacity is low.

scholarly journals Research on Dynamic Equivalent SOC Estimation of Hybrid Energy Storage System Based on Sliding Mode Observer

2021 ◽  
Vol 9 ◽  
Author(s):  
Yifei Wang ◽  
Wei Jiang ◽  
Chengwei Zhu ◽  
Zhiqi Xu ◽  
Yifan Deng
Keyword(s):  
Energy Storage ◽  
Real Time ◽  
Sliding Mode ◽  
Storage System ◽  
Estimation Method ◽  
Energy Storage System ◽  
Sliding Mode Observer ◽  
Hybrid Energy ◽  
Soc Estimation ◽  
Hybrid Energy Storage

This article proposes a sliding mode observer based dynamic equivalent state of charge (ESOC) estimation method for hybrid energy storage system (HESS). Since different types of energy storage components and power electronics circuit are coupled in the HESS, the traditional SOC estimation method cannot reflect the real-time operation characteristics of the HESS. To tackle this problem, a sliding mode observer based on the model of the HESS is built in this article. By collecting the corresponding voltage and current signals, the internal parameters of energy storage elements can be observed accurately in real time. The dynamic ESOC is further defined with the idea of real-time charge balance to reflect the accurate available capacity of the HESS. Finally, the simulation results based on MATLAB/Simulink model are given to verify the feasibility of the proposed dynamic ESOC.

scholarly journals A Sliding Mode Observer SOC Estimation Method Based on Parameter Adaptive Battery Model

2016 ◽  
Vol 88 ◽  
pp. 619-626 ◽  
Author(s):  
Bo Ning ◽  
Jun Xu ◽  
Binggang Cao ◽  
Bin Wang ◽  
Guangcan Xu
Keyword(s):  
Sliding Mode ◽  
Estimation Method ◽  
Sliding Mode Observer ◽  
Soc Estimation ◽  
Battery Model ◽  
Parameter Adaptive

Simply designed and universal sliding mode observer for the SOC estimation of lithium‐ion batteries

2017 ◽  
Vol 10 (6) ◽  
pp. 697-705 ◽  
Author(s):  
Qiaoyan Chen ◽  
Jiuchun Jiang ◽  
Haijun Ruan ◽  
Caiping Zhang
Keyword(s):  
Lithium Ion Batteries ◽  
Sliding Mode ◽  
Lithium Ion ◽  
Sliding Mode Observer ◽  
Soc Estimation
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