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A Capacitively Level Shifted Fast Cell-to-Cell Battery Voltage Equalizer

Dam, Shimul Kumar and John, Vinod (2017) A Capacitively Level Shifted Fast Cell-to-Cell Battery Voltage Equalizer. In: 2017 IEEE TRANSPORTATION ELECTRIFICATION CONFERENCE (ITEC-INDIA), DEC 13-15, 2017, INDIA.

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Official URL: https://doi.org/10.1109/ITEC-India.2017.8333873


Battery voltage equalizer circuit is an essential part of battery-based storage management system. It makes the voltages of series connected batteries equal to avoid overcharging and over-discharging In this work, a fast cell-to-cell voltage equalizer topology is proposed. The equalizer has a modular structure consisting of one power converter leg for each battery. Capacitors are used to level shift voltage in order to provide capacitive isolation among the converter legs. Converter legs are modulated with sine-triangle modulation and power flow is controlled by phases of these modulation signals. This equalizer can transfer charge among multiple batteries in a string simultaneously or selectively. This topology has been theoretically analyzed and experimentally verified with a prototype.

Item Type: Conference Paper
Series.: IEEE Transportation Electrification Conference and Expo
Publisher: IEEE
Additional Information: IEEE Transportation Electrification Conference (ITEC-India), Pune, INDIA, DEC 13-15, 2017
Keywords: Keywords Voltage equalization;fast equalizer;battery management;cell-to-cell charge transfer
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 10 Jan 2019 12:00
Last Modified: 10 Jan 2019 12:00
URI: http://eprints.iisc.ac.in/id/eprint/61264

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