制冷剂冷却电池的纯电动汽车热管理系统夏季工况模拟
System Simulation of Pure Electric Vehicle Thermal Management with a Refrigerant Cooling Battery under Summer Conditions

以纯电动汽车整车热管理系统为研究对象，本文提出纯电动汽车整车热管理方案，研究在夏季工况下的整车热管理性能。电池与乘客舱采用制冷剂并联冷却，利用热管的高导热系数来传递热量，电机采用液冷，并在新欧洲驾驶循环工况下用系统模拟的方法进行测试。结果表明：经过64 s，乘客舱温度从35 ℃降至24 ℃，随后乘客舱始终围绕设定温度24 ℃上下波动；电池温度经过68 s从35 ℃降至25 ℃，然后在整车控制策略下，使其维持稳定温度；电机温度在市内循环缓慢增长，在郊区循环急速增长，但维持在80 ℃以内。
Based on thermal management systems of pure electric vehicles, a thermal management scheme for a whole vehicle is proposed in this study under summer conditions. In this scheme, a parallel cooling system using refrigerant is developed for the batteries and cabin, and the heat transfer performance of the heat pipe is considered for heat exchange between the batteries and refrigerant. A liquid cooling system is used for the motor. The proposed thermal management system was tested using a system simulation under the New European Driving Cycle at 35 ℃. The results demonstrated that the temperature of the cabin reached 24 ℃ after 64 s. The cabin temperature then maintained a dynamic stability near the setting temperature. Moreover, the temperature of the batteries reached 25 ℃ after 68 s then maintained a stable temperature under the vehicle control strategy. An increase in motor temperature occurred at a low rate under an urban cycle and exhibited a rapid increase under an suburb cycle. However, the temperature of the motor was maintained within 80