Energy management strategy (EMS) is crucial in improving the fuel economy of plug-in hybrid electric vehicle (PHEV). Existing studies on EMS mostly manage powertrain and cooling system separately which cannot get the minimum total energy consumption. This paper aims to propose a novel EMS for a new type of dual-motor planetary-coupled PHEV, which considers cooling power demand and effect of temperature on fuel economy. Temperature-modified engine model, lithium-ion battery model, two motors, and cooling system models are established. Firstly, the separated EMS (S-EMS) is designed which manages powertrain and cooling system separately. Sequentially, after the analysis of thermal characteristics of the powertrain and cooling system, the thermal-based EMS (T-EMS) is then proposed to manage two systems coordinately. In T-EMS, cooling power demand and the charging/discharging energy of motors are calculated as equivalent fuel consumption and integrated into the object function. Besides, a fuzzy controller is also established to deicide the fuel-electricity equivalent factor with consideration of the effect of temperature and state of charge on powertrain efficiency. Finally, the hardware-in-loop experiment is carried out to validate the real-time effect of EMS under the New European Driving Cycle. The result shows that cooling power demand and temperature can significantly affect the fuel economy of the vehicle. T-EMS shows better performance in fuel economy than S-EMS. The equivalent fuel consumption of the cooling system of T-EMS decreases by 27% compared with that of S-EMS. The total equivalent fuel consumption over the entire trip of PHEV using T-EMS is reduced by 9.7%.

能源管理策略（EMS）对于提高插电式混合动力汽车（PHEV）的燃油经济性至关重要。现有的关于EMS的研究大多将动力总成和冷却系统分开管理，从而无法获得最低的总能耗。本文旨在针对新型双电机行星耦合PHEV提出一种新型EMS，其中考虑了冷却功率需求和温度对燃油经济性的影响。建立了调温发动机模型，锂离子电池模型，两个电动机和冷却系统模型。首先，设计分离的EMS（S-EMS），分别管理动力总成和冷却系统。随后，在分析了动力总成和冷却系统的热特性之后，提出了基于热的EMS（T-EMS）以协调管理两个系统。在T-EMS中，冷却功率需求和电动机的充电/放电能量被计算为等效燃料消耗，并集成到目标函数中。此外，还建立了一个模糊控制器，以考虑温度和充电状态对动力总成效率的影响来确定燃料-电当量因子。最后，进行了硬件在环实验，以验证新欧洲行驶周期下EMS的实时效果。结果表明，冷却功率需求和温度会显着影响车辆的燃油经济性。T-EMS在燃油经济性方面比S-EMS更好。与S-EMS相比，T-EMS的冷却系统的等效油耗降低了27％。