关键词: 电动汽车；主动加热技术；电驱总成系统；热管理系统；低温性能

Abstract: With the rapid development of the new energy automobile industry, the competition is intensifying, and the requirements of car companies are getting higher and higher in terms of weight reduction and cost reduction and technological innovation. The energy utilization rate and integration of thermal management system have become one of the core elements of product competitiveness, and the heat energy utilization of electric drive assembly has become an important topic of industry research. Through the test of active heating technology of electric drive assembly on the vehicle, the influencing factors, performance and application difficulties of active heating are analyzed, and how to improve the performance and energy utilization rate of active heating and enhance the application feasibility of this technology are discussed. To achieve a high degree of integration of thermal management system, reduce vehicle weight and cost, improve the low temperature adaptability of electric vehicles, and enhance user experience. It has practical guiding significance, and also provides reference experience for the development of active heating technology of electric drive assembly.

Key words: electric vehicle; active heating technology; electric drive system; thermal management system; low-temperature performance