Abstract- This paper studies the charging scenario of the
battery power bank with buck-boost battery power modules
(BPMs) connected in series. For the BPMs with serial
connection, the charging currents to batteries can be
individually scheduled by adjusting the duty-ratios of the
associated power converters. During the charging process,
those batteries having been completely charged can be
isolated from the battery power bank without interrupting
the charging operation. To fully utilize the available
charger's capacity, a simple charging scenario is proposed
according to the state-of-charges (SOCs) of the batteries
under the limitations of the allowable charger's power and
the maximum battery charging current. Experiments
carried out on four buck-boost type BPMs have confirmed
the efficient performance of the charging scenario.
Keywords: Battery, Battery power module (BPM), Charging
scenario, State-of-charge (SOC).