In response to the diverse energy supply and safe operation requirements of intelligent devices, the core components include low-power power management chips, charging management modules, battery protection chips, over-temperature/over-current/overload protection devices, and electromagnetic compatibility (EMC) filters, etc. On one hand, they achieve efficient energy conversion, low-power operation, and long-lasting battery life (such as long standby time for smart wearables), meeting the energy demands of mobile portable and fixed-installation intelligent devices; on the other hand, they resist electrical abnormalities, electromagnetic interference, overloading, overheating, etc., while ensuring user safety (such as preventing electric leakage in smart appliances), and comply with the strict safety and energy efficiency standards for intelligent devices.