The development prospect of hybrid technology 1) Hybrid electric vehicles have good power performance, good fuel economy, clean and environmental protection, and are economical and practical. In order to improve the power, economy and environmental protection of vehicles, it is necessary to adopt the most advanced internal combustion engine technology and deeply analyze the low fuel consumption characteristics; Select the motor with the highest specific power, specific energy and efficiency and the highest torque density, and study its low speed, high torque, efficiency and regenerative braking energy feedback performance; After careful characteristic analysis and experimental research, the combination and superposition of their respective high-performance segments are optimized. 2) The high absolute cost of hybrid electric vehicles is the main difficulty in the popularization and application of hybrid electric vehicles at present, because hybrid electric vehicles must be equipped with batteries at least besides the previous power plant, and its cost cannot be reduced to the level of ordinary vehicles. Therefore, the primary problem in the development of hybrid electric vehicle technology is to reduce the cost, which is also the biggest problem to be solved in the future, especially the cost of power battery, motor drive system and electronic control system. 3) Improve the efficiency of energy recovery during driving. Starting from the automobile manufacturing stage, it is the premise for the popularization and application of hybrid electric vehicles to design and improve the automobile power system, meet the requirements of regenerative braking recovery, strengthen the reliability of hybrid electric vehicles and solve the service life and reliability problems of power batteries.