Search and connect to peripheral BMS devices through mobile Bluetooth, and collect battery data of peripheral BMS devices. The collected data includes SOH, SOC, total voltage, total current, number of charging and discharging cycles, temperature of various parts of the battery, individual voltage of each cell in the battery, protection status of the battery product, and information on whether certain functions of the battery product are working properly. The relevant hardware product is a battery protection board with a battery management system.