关键词: 新能源汽车；集成化开发；热管理；功能安全；工程应用

Abstract: Aiming at the industrial pain points of low efficiency, large volume, and insufficient reliability in traditional distributed electric drive systems, this paper studies the development and application of the 11-in-one integrated electric drive assembly technology. A highly integrated electric drive solution is developed through system architecture design, key technology research, performance verification, and engineering application. Firstly, the module composition and integration principle of the 11-in-one assembly are defined, with core technologies including shared mechanical housing, laminated electrical busbar, full-domain thermal management, and multi-core collaborative control tackled emphatically. Secondly, bench tests and real vehicle experiments are conducted to quantitatively verify its performance advantages. The overall system efficiency reaches 90.04%, an increase of 4.04% compared with the traditional three-in-one scheme; the power density hits 2.0 kW/kg, a rise of 33.3%; and the equipment failure rate decreases by 70%. Finally, massproduction cases of mainstream self-developed passenger and commercial vehicles are adopted to verify the multi-scenario adaptability of the assembly. Research shows that the deep integration of machinery, electricity, and software in the 11-in-one electric drive assembly effectively improves the driving range, power performance, and reliability of new energy vehicles, providing a mature engineering reference for the iterative upgrading of core technologies of new energy vehicles.

Key words: new energy vehicles; integrated development; thermal management; functional safety; engineering application