插电式混合动力汽车车载复合电源功率分配策略研究

The Power Allocation Strategy for Plug-in Hybrid Electric Vehicle Hybrid Power System

将原有插电式混合动力汽车单一电源系统改造成复合电源系统,根据整车性能要求及所用循环工况对车载电源的能量和功率需求解耦,完成动力电池和超级电容的参数匹配;在Matlab/simulink中建立复合电源功率分配策略,仿真结果表明,采用复合电源能减少动力电池循环充电次数,有效避免大电流对动力电池的冲击,充分发挥超级电容的高比功率特性,与改造前相比,燃油经济性提高3.4%,纯电动行驶里程增加1.3%。

According to the vehicle performance requirements and driving cycle, the original singlepower system of a plug-in hybrid electric vehicle is transformed into hybrid power system which isconsist of battery and super-capacitor that are matched by decoupling the requirement of energy andpower. The power allocation strategy of hybrid power is built in Matlab/simulink. The simulationresults show that the hybrid power system can reduce the battery charge cycles, effectively avoid theimpact of battery from the large current and can give full play to high power characteristics ofsuper-capacitor. Comparing with the former, the fuel economy and pure electric mileage are increasedby 3.4% and 1.3%.