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

摘要： 针对传统分散式电驱系统效率偏低、体积偏大、可靠性不足的行业痛点，文章围绕电 驱 11 合 1 总成技术的发展与应用开展研究，依托系统架构设计、关键技术攻关、性能验证及 工程落地应用，打造高集成度电驱解决方案。首先界定 11 合 1 总成的模块构成与集成原理， 重点攻克机械共用壳体、电气叠层铜排、全域热管理、多核协同控制等核心技术；再通过台 架测试与实车试验，量化验证其性能优势，测得系统综合效率 90.04%，较传统三合一方案提 升 4.04%，功率密度达 2.0 kW/kg，提升 33.3%，设备故障率下降 70%；最后结合主流自主乘 用车、商用车量产案例，验证该总成多场景适配能力。研究表明，电驱 11 合 1 总成通过机械、 电气、软件深度融合，可有效提升新能源汽车的续航、动力与可靠性，为新能源汽车核心技 术迭代升级提供成熟工程参考。

关键词: 新能源汽车；集成化开发；热管理；功能安全；工程应用