Based on vehicle speed and ON/ACC signals, analyze the data under vehicle running and non-running conditions, guide the selection of generator, DC-DC and battery parameters, and the design of vehicle dormancy. Take the year as the unit, compare and analyze the load profile data of the same vehicle in different years, and obtain the relevant data of the impact of the season on the vehicle. On a yearly basis, it analyzes the load profile data of similar models, finds out the differences, and forms a load profile database, which can detect vehicle abnormalities in advance, reduce maintenance costs, and guide drivers to use vehicles rationally and reduce use costs.