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    • 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
    Key Words:extended-range electric vehicle  cooling system  thermal management  integrated design  flow heat transfer
    Author NameAffiliationE-mail
    QIU Yue Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 1090903587@qq.com 
    LEI Jilin* Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China leijilin@sina.com 
    YANG Xiongzhuan Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 32515222538@qq.com 
    WANG Weichao Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 287692950@qq.com 
    LI Zhenzhuo Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 1963106790@qq.com 
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    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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