Research and Application on Reliability Test of Inverter for New Energy Vehicles

The inverter is a crucial core component in new energy vehicles, responsible for energy conversion, driving the vehicle, and ensuring power safety. The reliability requirement for the inverter within the designated usage cycle is extremely high. In order to validate its reliability characteristics within a shorter time frame, this paper introduces three classic reliability tolerance tests: high-temperature resistance test, temperature cycle resistance test, and steady-state humidity and heat resistance test. These tests are widely acknowledged as reliable methods for evaluating the endurance of inverter components. Additionally, a corresponding reliability mathematical model is established to analyze the performance. By considering the typical product attributes of the inverter, appropriate test plans are formulated. Finally, three different prototypes undergo accelerated aging tests, which conclusively demonstrate that the proposed method significantly reduces the test cycle, lowers test costs, and improves efficiency in product research, development, design, and application.