关键词: 纯电动客车；动力系统；匹配设计

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