Publication Date


Document Type


First Advisor

Zinger, Donald S.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Electrical Engineering


With the increased use of batteries in everyday life, it is crucial to have a robust and reliable battery system that can continue to power our devices. This paper will investigate the reliability, impact on the batteries, and functionality of the bidirectional battery management system (BMS). The design uses two bidirectional switches for each cell, one in series with the cell and one in parallel with the other bidirectional switch and cell. This will allow the cell to be taken in and out of the circuit for any reason determined by the BMS. Taking the battery in and out of the circuit has many benefits, such as balancing the cells, keeping lower-performing batteries out of harsh conditions, and creating unique charging and discharging profiles. In order to show the reliability, impact on batteries, and functionality, a six-cell battery management system was designed. While cycling the batteries, data was taken on the capacity, output of the batteries, and other battery pack parameters to determine the impact on the batteries, functionality, and reliability. This data showed that the bidirectional battery management system was capable of managing the battery with little effect on the batteries under normal operating conditions.


77 pages




Northern Illinois University

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In Copyright

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NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type