Modified active balancer for use in multi-module batteries

Oleksandr Bondarenko; Dmytro Lipko

doi:10.15222/TKEA2024.1-2.11

Oleksandr Bondarenko Igor Sikorsky Kyiv Polytechnic Institute http://orcid.org/0000-0002-4276-1145
Dmytro Lipko Igor Sikorsky Kyiv Polytechnic Institute https://orcid.org/0000-0001-8232-3249

DOI: https://doi.org/10.15222/TKEA2024.1-2.11

Keywords: electric vehicle, cell, multi-module battery, active balancing, passive balancing, battery management system

Abstract

The study considers the structure of multimodular batteries (on the example of electric vehicle batteries), cell configuration, chemical composition and capacity of the elements that form the cells. The authors compare the battery characteristics of most models of electric cars. Based on the analysis of the topologies of active balancers, it was proposed to additionally classify active balancers by a new classification feature, namely by the way energy flows between cells. The improved topology of the active balancer proposed in this study provides additional balancing at the module level and allows flexible change of the balancing method to speed it up and increase reliability. Modeling of the balancing speed for different active balancer topologies helped to confirm the effectiveness of the proposed topology.

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