邱越,雷基林,杨雄专,等.增程式电动汽车动力系统一体化冷却传热分析[J].内燃机工程,2024,45(4):47-55.
增程式电动汽车动力系统一体化冷却传热分析
Analysis of Integrated Cooling Heat Transfer in the Power System of an Extended-Range Electric Vehicle
DOI：10.13949/j.cnki.nrjgc.2024.04.006
关键词:增程式电动汽车  冷却系统  热管理  一体化设计  流动传热
Key Words:extended-range electric vehicle  cooling system  thermal management  integrated design  flow heat transfer
基金项目:云南省科技厅重大科技专项项目（202102AC080004）
作者单位E-mail
邱越 昆明理工大学 云南省内燃机重点实验室，昆明 650500 1090903587@qq.com 
雷基林* 昆明理工大学 云南省内燃机重点实验室，昆明 650500 leijilin@sina.com 
杨雄专 昆明理工大学 云南省内燃机重点实验室，昆明 650500 32515222538@qq.com 
王伟超 昆明理工大学 云南省内燃机重点实验室，昆明 650500 287692950@qq.com 
李臻卓 昆明理工大学 云南省内燃机重点实验室，昆明 650500 1963106790@qq.com 
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摘要:以一款增程式轻型卡车为研究对象，对增程式动力系统的发动机和电机采用一体化冷却系统设计。在预设的运行工况，通过试验测试，计算出工况点增程器和电驱系统的散热需求，对冷却液和冷却水泵进行选型匹配。结合试验测试建立了增程器和电驱系统冷却回路一维仿真模型，对比分析了电驱系统冷却管道串联与并联的冷却效果与能耗情况，验证了驱动电机冷却液帮助发动机冷起动的可行性。研究结果表明：通过试验测量散热量选择到的电子水泵，能更加高效准确地控制冷却液流量，冷却效果更好。冷却系统一维仿真分析中能从温升曲线直观看到并联冷却管路冷却效果更好，并联管路中的电磁阀根据工况不同控制开口大小，比串联管路统一控制冷却液流量冷却更高效。并联冷却管路中驱动电机冷却时快速产生热量，在与发动机冷起动时进行热交互可以帮助发动机快速暖机，改善发动机冷起动排放差、动力弱的情况。
Abstract:Taking an extended-range light truck as the research object， the engine and motor of the extended-range power system were designed with an integrated cooling system. In the preset operating conditions， the heat dissipation requirements of the range extender and the electric drive system were calculated through tests， and the coolant and cooling water pump were selected and matched. The one-dimensional simulation model of the range extender and the cooling circuit of the electric drive system was established. The cooling effect and energy consumption of the series and parallel cooling pipes of the electric drive system were compared and analyzed. The feasibility of the coolant of the drive motor to help the engine cold start was verified. The results show that the electronic water pump can control the coolant flow more efficiently and accurately， and the cooling effect is better. In one-dimensional simulation analysis of the cooling system， it can be directly seen in temperature rise curve that the cooling effect of the parallel cooling pipeline is better， and the solenoid valve in the parallel pipeline can control the opening size according to different working conditions， and the cooling is more efficient than the unified control of the series pipeline coolant flow. Heat is generated quickly when the drive motor is cooled in the parallel cooling pipeline， and thermal interaction with the engine during cold start can help the engine warm up quickly， and improve the poor emissions and weak power of the engine during cold start.
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