The 48V mild hybrid system is a transitional technology between traditional fuel vehicles and high-voltage hybrid vehicles. By increasing the on-board voltage from 12V to 48V and integrating core components such as lithium batteries, BSG/ISG motors, and DC-DC converters, it achieves kinetic energy recovery and engine auxiliary drive. Its working principle is mainly divided into three stages: during braking or coasting, the motor converts kinetic energy into electrical energy and stores it in the 48V lithium battery; during starting or acceleration, the motor provides additional torque to assist the engine, avoiding high fuel consumption ranges; in the intelligent start-stop phase, the 48V system can quickly restart the engine and maintain the operation of on-board electrical devices, reducing vibration and lag. This system can reduce overall fuel consumption by 8%-15%, improve fuel economy by approximately 10%-18%, and enhance driving smoothness, such as reducing start-stop vibration by 80%. The 48V lithium battery has a lifespan of approximately 5-8 years, with replacement costs ranging from 3,000 to 8,000 ringgit, so it is advisable to select models offering long-term warranties. Currently, the mainstream approach employs BSG motors in P0 configuration, which directly replace traditional alternators and starter motors, featuring high technical maturity and broad compatibility with family sedans.
