基于AMEsim的纯电动车热管理系统性能分析

Performance Analysis of Pure Electric Vehicle Thermal Management System Based on AMEsim

摘要: 纯电动汽车热管理系统主要用于确保电池、电机和电机控制器等热安全和乘员舱舒适性，但热管理系统同时也会消耗大量能量。本文从提高整车能量利用效率着手，构建了将热泵、电池热管理和电机余热回收相结合的多模式集成式管理系统(Multi-modes integrated thermal management system, MITMS)的拓扑结构，并根据电池、乘员舱和电机的温控需求，制定了MITMS的模式切换控制策略。基于AMEsim仿真软件，本文建立了系统的仿真模型，采用夏季、冬季两个环境条件下的多种工况，对所构建MITMS进行热管理性能模拟。结果表明，夏季条件下，MITMS可较好地满足电池和乘员舱的制冷需求。而电池热管理的开启对系统制冷量有着较大影响，系统制冷量平均降低了28.9%。冬季工况下，余热回收对系统的低温制热性能有较大的影响，随着余热回收量的提升，系统COP平均提升了34.8%。基于CLTC-P驾驶循环工况，验证了系统的现实可行性。

Abstract: The thermal management system of pure electric vehicles is mainly used to ensure the thermal safety of batteries, motors and motor controllers and the comfort of the passenger compartment. However, the thermal management system also consumes a lot of energy. In order to improve the energy utilization efficiency of the whole vehicle, this paper constructs the topology of a multi-mode integrated thermal management system (MITMS) that combines heat pump, battery thermal man-agement and motor waste heat recovery. According to the temperature control requirements of the battery, passenger compartment and motor, the mode switching control strategy of MITMS is for-mulated. Based on AMEsim simulation software, this paper establishes a simulation model of the system, and simulates the thermal management performance of the built MITMS under various working conditions in summer and winter. The results show that MITMS can meet the cooling re-quirements of battery and passenger compartment in summer. The battery thermal management has a great impact on the cooling capacity of the system, and the cooling capacity of the system is reduced by 28.9% on average. In winter, waste heat recovery has a great impact on the low-temperature heating performance of the system. With the increase of waste heat recovery, the COP of the system has increased by 34.8% on average. Under the CLTC-P driving cycle, the feasibility of the system is verified.