Abstract: A thermal management system for series-parallel hybrid vehicle is designed and studied, which is based on the parameters of hybrid systems. Frist, inlet air volumes for all radiators on different critical conditions are simulated. Then, the simulation results show that the temperatures of high-temperature radiator and oil radiator are 1.5 °C and 3.8 °C higher than the design goals on the worst conditions, which are owed for the poor of inlet air volumes and defect of radiators layout. Finally, the fan and radiators layout are optimized. The inlet air volumes of high-temperature radiator and oil radiator are increased 9.37% and 8.4%. The temperatures of high-temperature radiator and oil radiator are reduced 4 °C and 4.1 °C, which are achieved the design goals.

Key words: Hybrid vehicle; Thermal management system; Series-parallel hybrid; Development optimization

摘要： 针对某款搭载串并联式混合动力系统的汽车，开展热管理开发及相关研究。文章首先 结合混动总成系统热管理参数需求，设计开发了一台热管理系统方案；其次依据热管理关键 工况，提取和分析得到了各散热单元的进风量；然后对该方案下的热管理性能进行仿真分析， 发现该方案存在高温散热单元和油冷器进风量不足、布局不佳等缺陷，导致高温散热单元和 油冷器温度分别高于目标值 1.5 °C 和 3.8 °C；最后结合风扇和散热单元布局优化等措施，使 得高温散热单元和油冷器进风量分别提升了 9.37%和 8.4%，高温散热单元和油冷器温度分别 降低了 4 °C 和 4.1 °C，达成开发目标。

关键词: 混合动力汽车；热管理系统；串并联混合动力；开发优化