分析了锂离子电池作为新能源汽车单一电源的局限性和超级电容作为辅助动力源的优势，设计了锂离子电池与超级电容的复合电源系统拓扑结构． 然后基于 NEDC(欧
洲 3/4 排放标准试验工况)循环工况，结合锂离子电池和超级电容的性能参数对锂离子电池 － 超级电容复合电源进行参数匹配，利用超级电容器“削峰填谷”的作用来提高锂离子电池的性能和使用寿命． 其后，基于整车循环工况试验建立容量衰减模型． 最后，采用速度跟随式多目标优化的逻辑门限值控制策略，利用 Matlab/Simulink 进行仿真计算，验证了复合电源系统拓扑结构设计、容量衰减模型和控制策略的合理性． 仿真结果表明，该模型可以将电池的寿命提高 50%，使电池避免大电流的冲击，降低了整车使用成本．

Firstly,both the limitations of lithium-ion battery as a single power of new-energy automotive and the ad- vantages of super capacitor as an auxiliary power source are analyzed,and the topology of hybrid power system com- posed by lithium-ion battery and super capacitor is designed.Secondly,the parameters of the hybrid power system are matched on the basis of NEDC driving cycle by considering the performances of both lithium-ion battery and su- per capacitor,and the load shifting rule of super capacitor is used to improve the performance and lifespan of lithium- ion battery.Then,a capacity fading model is established on the basis of vehicle driving cycle test.Finally,by means of the multi-objective optimization logic threshold control strategy with speed tracking,the reasonability of the proposed topology,capacity fading model and logic control strategy of the hybrid power system is verified through Matlab/Simulink simulation.The results show that the proposed model helps improve the battery lifespan by 50% and prevent the battery from high-current impact,and thus vehicle cost decreases.