The working status data information of the battery pack is transmitted to the APP through the Bluetooth module to manage and maintain each battery unit intelligently, to prevent the battery from overcharging and overdischarging problems, to extend the battery life, and to monitor the battery status at the same time. Allow users to obtain the working status and data information of the battery pack in real time to better use battery pack, to satisfy the user's daily work and life needs, and improve usage experience.