1. Users can filter the Bluetooth ID they need to connect; 2. Data query management can be performed on the batteries. The user can look up the relevant status of each string of battery and replace or maintain the abnormal one; 3. For the security of parameter modification, the user needs to enter the password in advance; 4.Bluetooth APP can control the charging or discharging status of the battery pack; 5. Timely and effectively display the current faults and the number of faults in the battery;