Load Current and State-of-Charge Coestimation for Current Sensor-Free Lithium-Ion Battery
Artikel i vetenskaplig tidskrift, 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


current sensor-free


battery management

State of charge

Current measurement

Voltage measurement

Mathematical model


Zhongbao Wei

Beijing Institute of Technology

Jian Hu

Beijing Institute of Technology

Hongwen He

Beijing Institute of Technology

Yang Li

Chalmers, Elektroteknik, System- och reglerteknik

Binyu Xiong

Wuhan University of Technology

IEEE Transactions on Power Electronics

0885-8993 (ISSN) 19410107 (eISSN)

Vol. 36 10 10970-10975 9387136


Annan kemiteknik

Annan elektroteknik och elektronik



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