A Modular and Integrated Reconfigurable Design for Battery Energy Storage System

Abstract

Conventional battery energy storage system is not adaptive to different applications and lacks fault tolerance due to its fixed configuration. Moreover, several DC/DC converters are utilized to fulfill charge/discharge/balance requirements which make the system large and complex. In this paper, an integrated reconfigurable battery energy storage system is proposed to mitigate these deficiencies. The main advantage of the proposed method is that it can be reconfigured into series, parallel, and series-parallel configurations with full capacity of bypassing any battery modules under any configuration. The proposed system can also perform as an integrated converter, significantly reducing system complexity. Corresponding experiments are conducted on a four battery modules prototype to verify the effectiveness of the proposed method.