基于电池老化的并联式HEV能量管理策略

Energy management strategy for a parallel HEV based on battery aging

针对电池老化和能耗问题,在优化方法中搭建锂离子电池循环老化和日历老化模型,分析电池老化模型的重要性及对汽车在运行过程中能量消耗的影响,通过电池荷电状态(SOC)和容量变化两个参考轨迹,调整电池的充放电状态。针对并联式混合动力汽车(HEV),基于Pontryagin最小值原理,提出一种以电池退化和能耗最小为目标的自适应等效燃油消耗最小(ECMS)控制策略。基于MATLAB仿真分析可得:考虑电池老化情况的电池容量损失降低了2.33%,总燃油消耗降低了1.25%,有效充放电总容量减少了3.20%,同时可减缓电池老化。

Aiming at the problem of battery aging and energy consumption,the Li-ion battery cycle aging and calendar aging models were built in the optimization method,the importance of the battery aging model and the impact on the energy consumption of the car during operation were analyzed.The charging and discharging state of battery was adjusted by changing the two reference trajectories of SOC and capacity.For the parallel hybrid electric vehicle(HEV)and based on the Pontryagin minimum principle,an adaptive equivalent consumption minimization strategy(ECMS)with the goal of battery degradation and minimum energy consumption was proposed.The battery capacity loss considering the aging of the battery was reduced by 2.33%,the total fuel consumption was reduced by 1.25%,the total effective charge-discharge capacity was decreased by 3.20%,the battery aging could be slowed down.