Battery voltage sensorless charge equalizer using the multi-winding transformer

A simple and easy magnetic coupling equalizer for a series-connected lithium-ion battery string is presented. The equalizer applies identical duty cycle to all active power switches without using the voltage sensing circuits and the secondary side components of multi-winding transformer. During the...

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Bibliographic Details
Main Authors: Chang-Soon Lim, Rae-Young Kim, Dong-Seok Hyun
Format: Conference Proceeding
Language:English
Subjects:
Couplings
Magnetic analysis
Power supplies
Switches
Online Access:Request full text
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Description
Summary:A simple and easy magnetic coupling equalizer for a series-connected lithium-ion battery string is presented. The equalizer applies identical duty cycle to all active power switches without using the voltage sensing circuits and the secondary side components of multi-winding transformer. During the turn-on switching interval, the equalizer automatically transfers energy from the high-voltage battery cells to the low-voltage battery cells. The proposed equalizer can effectively reduce size, cost, and design complexity of the equalizer system.
ISSN:1938-8756
DOI:10.1109/VPPC.2012.6422543