IEICE Electronics Express
Online ISSN : 1349-2543
LETTER
A highly-integrated and efficient commercial distributed EV battery balancing system
Feng ChenJun YuanChaojun ZhengCanbo WangZhan Li
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JOURNALS FREE ACCESS

2018 Volume 15 Issue 8 Pages 20180005

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Abstract

This paper focuses on the imbalance problem of serial cells in lithium-ion batteries applied in electric vehicles (EVs). In order to meet more strict requirements of size, efficiency, cost, and reliability in commercial application, a highly-integrated and efficient distributed battery balancing system is developed. In the system, each balancing node (BN) and its controller, a designed specific integrated circuit (IC), are independent, distributed and integrated in an IC-packaged module. Besides, a 50% state-of-charge (SOC)-aligned balancing strategy is proposed and applied. The experiment and commercial application results show the designed balancing system performs excellently in improving battery capacity and extending cycle life.

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© 2018 by The Institute of Electronics, Information and Communication Engineers
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