Load Current and State-of-Charge Coestimation for Current Sensor-Free Lithium-Ion Battery
Journal article, 2021
The installation of current sensors on lithium-ion batteries (LIBs) can be challenging due to practical constraints in specific applications like portable electronics and smart batteries. Motivated by this, our letter proposes a method for online load current and state-of-charge (SOC) coestimation, which mitigates the need of installing the current sensor for LIB management. The essence is to transform the state observation into a constrained optimization problem, which is solved numerically in a moving horizon framework to allow the online coestimation of SOC and input current. Experimental results suggest that the proposed method can coestimate the load current and SOC of LIB precisely even if the current sensor is absent. The encouraging results are insightful for reducing the structural complexity and cost of future LIB utilization.
lithium ion battery
Adaptation models
input estimation
State of charge
Optimization
current sensor-free
Estimation
battery management
State of charge
Current measurement
Voltage measurement
Mathematical model
Author
Zhongbao Wei
Beijing Institute of Technology
Jian Hu
Beijing Institute of Technology
Hongwen He
Beijing Institute of Technology
Yang Li
Chalmers, Electrical Engineering, Systems and control
Binyu Xiong
Wuhan University of Technology
IEEE Transactions on Power Electronics
0885-8993 (ISSN) 19410107 (eISSN)
Vol. 36 10 10970-10975 9387136Subject Categories
Other Chemical Engineering
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/TPEL.2021.3068725