Novel reconfigurable battery energy storage system

• Main Author: Huang, Huizhen
• Other Authors: Amer M. Y. M. Ghias
• Format: Thesis-Doctor of Philosophy
• Language: English
• Published: Nanyang Technological University 2025
• Subjects: Engineering; Power electronics
• Online Access: https://hdl.handle.net/10356/182511
• Institution: Nanyang Technological University

Battery energy storage systems (BESSs) are widely utilized in various applications, e.g., portable electrical devices, electric vehicles, and microgrids. However, conventional BESS structure with multiple battery cell/module/packs and fixed configuration exhibits the following deficiencies: adaptiveness, fault tolerance, and battery imbalance issue, which severely affects BESS reliability, capacity utilization, and battery lifespan. To tackle these issues, the reconfigurable BESSs are explored as potential solution in this thesis. These reconfigurable BESSs provides reconfiguration flexibility, fault tolerance capability and individual battery level active controllability. Therefore, this thesis proposes a modular reconfigurable BESS (MR-BESS) with improved characteristics and develops an equalizer-free balancing technique for reconfigurable type BESSs to bridge aforementioned gaps. The theoretical analysis of the proposed MR-BESS and balancing algorithm are supported with experimental results on hardware prototype to validate the effectiveness.