The power battery management system (BMS for short) is a protection and management unit specially designed for lithium-ion polymer battery packs in electric bicycles and electric motorcycles. Over-temperature and low-temperature protection, and has real-time power detection, cell voltage, passive balance, communication management and other functions. BMS manages the charge and discharge of lithium battery packs through the power MOS switch, and intelligently balances the power of each battery cell during the charging process to prevent overcharging and overdischarging of a single battery cell, and greatly extend the lithium battery pack’s capacity Service life, prevent the lithium battery pack from being damaged due to overcharging or over-discharging. When the BMS system is in an idle state, it will automatically enter sleep mode to minimize system power consumption; the system can provide communication wake-up, charge wake-up, discharge wake-up or other wake-up methods according to customer needs.