Analysis and Estimation of the Maximum Switch Current during Battery System Reconfiguration
Journal article, 2021

Batteries are interconnected in series and/or parallel to meet wide-range power or energy demands in various industrial applications. To pursue the benefits of multiple connection structures in one system, reconfigurable battery systems (RBSs) have recently emerged for safe and efficient operation, extended energy storage and delivery, etc. Switches are the essential elements to enable the battery system reconfiguration, but selecting appropriate switches for RBS designs has not been systematically investigated. To bridge this gap, analytical expressions are derived in this paper to estimate the maximum switch current and its upper limit to facilitate the selection of RBS switches. An RBS prototype based on H-bridges is set up and experimental results verify the effectiveness and advantage of the proposed estimation method. These analytical expressions, relying only on resistances of batteries and switches, are readily applicable to practical RBS design and much more efficient than conducting numerous circuit experiments, simulation tests, or circuit analyses, especially for large-scale systems. Moreover, the analysis framework and estimation method proposed for series-parallel mutual conversion can be adaptively extended to other complex system reconfigurations to facilitate various RBS designs.

switch current analysis

parallel connection

reconfiguration

Battery system

estimation

Author

Weiji Han

Chalmers, Electrical Engineering, Systems and control, Automatic Control

Anton Kersten

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Changfu Zou

Chalmers, Electrical Engineering, Systems and control, Automatic Control

Torsten Wik

Chalmers, Electrical Engineering, Systems and control, Automatic Control

Xiaoliang Huang

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Guangzhong Dong

Chalmers, Electrical Engineering, Systems and control, Automatic Control

IEEE Transactions on Industrial Electronics

0278-0046 (ISSN)

Vol. In press

Areas of Advance

Transport

Energy

Subject Categories

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TIE.2021.3091923

More information

Latest update

8/24/2021