Abstract: To address the practical issues of traffic congestion during school rush hours and the excessive number of vehicles used for student drop-off and pick-up, as well as to provide an efficient and convenient new commuting solution for students and their parents, this paper conducts research on the design and optimization of the powertrain for 12 m pure electric school bus. Centering on the core performance requirements of the vehicle, such as dynamic performance and economic efficiency, and with power batteries as the core power source, the paper completes the parameter matching calculation for key components including the drive motor and power batteries, determines the optimal parameter combination, and further constructs a high-efficiency powertrain assembly and supporting control strategy for the electric bus. In accordance with the simulation specifications of AVL_Cruise software, the paper establishes a simulation model for the powertrain and control system of the 12 m pure electric bus, and conducts simulation analysis on the dynamic performance and economic efficiency of the powertrain assembly. By comparing and verifying the simulation results with the design parameters of the actual vehicle's performance, the results show that the designed powertrain parameter matching scheme can fully meet the performance requirements of the vehicle in actual operation, providing feasible technical support for alleviating traffic pressure during school commutes and optimizing the school commuting mode.

Key words: pure electric bus; power system; matching design

摘要： 针对上下学高峰交通拥堵、接送学生车辆过多的现实问题，为广大学生及家长提供高 效便捷的通学新方案，文章开展 12 m 纯电动通学客车动力系统的设计与优化研究。围绕整车 动力性、经济性等核心性能要求，以动力电池为核心动力源，完成驱动电机、动力电池等关 键部件的参数匹配计算，确定最优参数组合，进而构建高能效的电动客车动力系统总成及配 套控制策略。依据 AVL_Cruise 软件仿真规范，搭建该 12 m 纯电动客车动力系统与操控系统 的仿真模型，对动力系统总成的动力性、经济性进行仿真分析。将仿真结果与实车性能设计 参数展开对比验证，结果表明，所设计的动力系统参数匹配方案能够充分满足车辆实际运行 的性能需求，为缓解通学交通压力、优化通学出行模式提供了可行的技术支撑。

关键词: 纯电动客车；动力系统；匹配设计