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Energies 2017, 10(5), 650; doi:10.3390/en10050650

A Battery Power Bank with Series-Connected Buck–Boost-Type Battery Power Modules

1
Department of Electrical Engineering, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung 80424, Taiwan
2
Realtek Semiconductor Corporation, 2 Innovation Rd. II, Hsinchu Science Park, Hsinchu 300, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Hai-Wen Li
Received: 14 March 2017 / Revised: 18 April 2017 / Accepted: 2 May 2017 / Published: 8 May 2017
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Abstract

The operation of a battery power bank with series-connected buck–boost-type battery power modules (BPMs) was investigated in this study. Each BPM consisted of a battery pack with an associated buck–boost converter for individually controlling battery currents. With a proposed discharging scenario, load voltage regulation with charge equalization among batteries was performed by controlling the battery currents in accordance with their state-of-charges (SOCs) estimated by real-time battery-loaded voltages detected under the same operating condition. In addition, the fault tolerance was executed to isolate exhausted or faulty batteries from the battery power bank without interrupting the system operation. Experiments were conducted to verify the effectiveness of the discharging scenario for a laboratory battery power bank with four series buck–boost BPMs. View Full-Text
Keywords: battery; battery power module (BPM); charge equalization; discharging scenario; fault tolerance; state-of-charge (SOC) battery; battery power module (BPM); charge equalization; discharging scenario; fault tolerance; state-of-charge (SOC)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wu, T.-H.; Moo, C.-S.; Hou, C.-H. A Battery Power Bank with Series-Connected Buck–Boost-Type Battery Power Modules. Energies 2017, 10, 650.

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