A charging scenario for parallel buck-boost battery power modules with full power utilization and charge equalization

• Published in: 2015 IEEE International Conference on Industrial Technology (ICIT) pp. 860 - 865
• Main Authors: Tsung-Hsi Wu, Chu-Shen Chang, Chin-Sien Moo
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-03-2015
• Subjects: Batteries; battery power module (BPM); charge equalization; charging scenario; Inductors; Monitoring; Multichip modules; Power supplies; state-of-charge (SOC); System-on-chip
• DOI: 10.1109/ICIT.2015.7125205

This paper proposes a charging scenario of a battery power bank constructed by a number of buck-boost type battery power modules (BPMs) in parallel. With associated power electronic converters, the BPMs in the power bank can be individually controlled. The charging scenario is programmed to fully utilize the available power from the dc source, and at the same time to perform charge equalization during the charging process. To share the available dc power cooperatively, the battery voltages are dynamically monitored to calculate the instantaneous charging power. Accordingly, the battery currents can be scheduled in accordance with their ongoing state-of-charges (SOCs), which are accumulated by the coulomb counting method. A battery power bank with four parallel buck-boost type BPMs is built. Experiments are conducted to demonstrate the functions of the charging scenario.