Fault-Tolerant Battery Power Network Architecture of Networked Swappable Battery Packs in Parallel

Chung-Jen Chou, Shyh-Biau Jiang, Tse-Liang Yeh and Chein-Chung Sun
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Chung-Jen Chou: Institute of Opto-Mechatronics Engineering, National Central University, Taoyuan City 32001, Taiwan
Shyh-Biau Jiang: Institute of Opto-Mechatronics Engineering, National Central University, Taoyuan City 32001, Taiwan
Tse-Liang Yeh: Institute of Opto-Mechatronics Engineering, National Central University, Taoyuan City 32001, Taiwan
Chein-Chung Sun: Material and Chemical Research Laboratories (MCL), Industrial Technology Research Institute (ITRI), B77, 195, Sec. 4, Chung Hsing Rd. Chutung, Hsingchu City 31057, Taiwan

Energies, 2021, vol. 14, issue 10, 1-21

Abstract: To improve the reliability and energy efficiency of battery swapping, we constructed a battery power network system with active redundancies and with multiple battery management controllers (one in each newly developed smart redundant battery pack). Each pack is getting ready to assume the role of the major to coordinate direct safe mounting of the packs onto the power bus for load sharing or charging without the need for a direct current to direct current converter. This fault-tolerant architecture provides multiple backups in both management control and power supply. To verify this design, the mounting, insertion, and removal of the battery packs were executed during charging and discharging. Battery packs can be swapped on and off safely at any time regardless of their charging states. Battery packs can be direct safe mounted onto the power bus by a threshold algorithm. With each mount on event, the equivalent output energy conversion efficiency ranges from 98.3% to 99.2% throughout the transient. Moreover, when the major battery pack fails or gets removed, other battery packs can indeed assume the role of major safely. The reliability, energy efficiency, and safety of our system were verified.

Keywords: battery exchange; battery management system; battery swapping; charging station; electric bus; parallel connected; power redundancy; reliable safety (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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