BATTERY PACK CHARGE/DISCHARGE CONTROL DEVICE

Provided is a battery pack charge/discharge control device in which two or more secondary battery units are connected in parallel as a battery pack. The battery pack charge/discharge control device includes an output power maximization circuit configured to maximize an output power based on an input power, and a voltage adjustment converter configured to adjust an output voltage from the output power maximization circuit, and an output power of a secondary battery unit is maximized when the secondary battery unit is in a short circuit state.