A High-Efficiency Active Battery-Balancing Circuit Using Multiwinding Transformer

By Siqi Li, Chunting Chris Mi, Mengyang Zhang. IEEE transactions on industry applications, 2013

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Energy Sharing Control Scheme for State-of-Charge Balancing of Distributed Battery Energy Storage System (2015, methodology): “While it is one of the most accurate options to obtain SOC information and balance cells' SOC values for charge equalization, cell-voltage based charge balancing is commonly used in the literature, as in [5, 8-9, 15-16].”
A MultiWinding Transformer Cell-to-Cell Active Equalization Method for Lithium-Ion Batteries With Reduced Number of Driving Circuits (2016, methodology): “The battery equalization methods can be divided into two categories: the passive equalization methods and the active equalization methods [7], [8].”
A Hierarchical Active Balancing Architecture for Lithium-Ion Batteries (2017, background): “The topology based on the multiwinding transformer is presented in [28] and [29] and all the windings share the same magnetic core, which minimizes the required number of the transformer.”
Study of the characteristics of battery packs in electric vehicles with parallel-connected lithium-ion battery cells (2014, background): “For normal operation, high efficiency battery balancing systems are able to improve the performance and prolong the lifetime of battery pack at some level [4].”