Charging and discharging control method and apparatus, and expandable power supply

Abstract

The present disclosure relates to the technical field of batteries, and discloses a charging and discharging control method, applied to an expandable power supply, the expandable power supply having a main battery and an expansion battery connected in parallel; where the method includes: detecting a discharging condition between the main battery and the expansion battery in a battery pack, where the discharging condition is configured to characterize the number of times the main battery charges the expansion battery, and the number of times the expansion battery charges the main battery; determining a replacement priority between the main battery and the expansion battery according to the discharging condition; determining a charging and discharging control logic for the main battery and the expansion battery according to the replacement priority; and performing charging and discharging control over the main battery and the expansion battery according to the charging and discharging control logic.

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