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<p>In response to the prevalent issues of high energy consumption, low efficiency, and insufficient integration in current thermal management systems(TMS) for battery electric vehicles (EVs), this study takes a dual-motor electric vehicle as the research platform. By incorporating high-performance heat exchangers and advanced heat pump air-conditioning technology, a highly integrated vehicle thermal management system (VITMS) has been developed. The system innovatively couples the passenger cabin, the traction battery, an independent heating, ventilation and air-conditioning (HVAC), and a waste heat recovery circuit for the battery and dual motors based on a waste-heat heat pump (WSHP). This study conducted a comprehensive analysis of the system’s precise temperature control performance under both high- and low-temperature conditions, with a focused evaluation of the energy consumption characteristics of three different heating strategies under extreme cold environments. The results indicate that the developed VITMS demonstrates excellent comprehensive thermal management capabilities. The system can efficiently perform multiple functions, including cooling, heating, preheating, and waste heat recovery, thereby ensuring that the traction battery, motor/electronic control unit, and passenger cabin consistently operate within their respective optimal temperature ranges while maintaining superior temperature uniformity. Notably, under extreme cold conditions, the VITMS operating in hybrid heating mode exhibits significant upper-level energy-saving advantages. Compared to the Positive Temperature Coefficient (PTC) heating scheme and the air-source heat pump (ASHP) assisted with PTC scheme, it reduces electricity consumption by 37.5% and 15.5%, respectively, and correspondingly increases the maximum driving range by 24.9% and 9.2%.</p>

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Research on integrated thermal management system for dual-motor electric vehicles based on heat pump air conditioning

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月22日

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  • Wenguang Niu,
  • Jing Pu,
  • Qiancheng Xu

摘要

In response to the prevalent issues of high energy consumption, low efficiency, and insufficient integration in current thermal management systems(TMS) for battery electric vehicles (EVs), this study takes a dual-motor electric vehicle as the research platform. By incorporating high-performance heat exchangers and advanced heat pump air-conditioning technology, a highly integrated vehicle thermal management system (VITMS) has been developed. The system innovatively couples the passenger cabin, the traction battery, an independent heating, ventilation and air-conditioning (HVAC), and a waste heat recovery circuit for the battery and dual motors based on a waste-heat heat pump (WSHP). This study conducted a comprehensive analysis of the system’s precise temperature control performance under both high- and low-temperature conditions, with a focused evaluation of the energy consumption characteristics of three different heating strategies under extreme cold environments. The results indicate that the developed VITMS demonstrates excellent comprehensive thermal management capabilities. The system can efficiently perform multiple functions, including cooling, heating, preheating, and waste heat recovery, thereby ensuring that the traction battery, motor/electronic control unit, and passenger cabin consistently operate within their respective optimal temperature ranges while maintaining superior temperature uniformity. Notably, under extreme cold conditions, the VITMS operating in hybrid heating mode exhibits significant upper-level energy-saving advantages. Compared to the Positive Temperature Coefficient (PTC) heating scheme and the air-source heat pump (ASHP) assisted with PTC scheme, it reduces electricity consumption by 37.5% and 15.5%, respectively, and correspondingly increases the maximum driving range by 24.9% and 9.2%.