全功率燃料电池汽车能量管理策略研究

Research on Energy Management Strategy of Full Power Fuel Cell Vehicle

以动力电池和超级电容作为副能量源的全功率燃料电池汽车能量管理策略直接影响整车经济性及各能源的寿命,基于小波变换的能量管理策略未能考虑到动力电池及超级电容的荷电状态(State of charge,SOC)变化。为了充分发挥各能源的动态特性,并保证动力电池和超级电容工作在合适的SOC范围内,在小波变换的基础上,采用模糊逻辑控制的方法动态分配燃料电池和动力电池之间的功率输出,并对超级电容优先进行制动能量回收。建立了AVL Cruise联合Simulink仿真平台,基于WLTC工况验证所提策略的有效性。结果表明该策略具有可行性,并能够保证动力电池和超级电容处于更高效的SOC范围内,相比基于小波变换的策略整车氢耗量降低3.8%。

The energy management strategy of full power fuel cell vehicle with battery and supercapacitor as secondary energy source directly affects the vehicle economy and the life of each energy.The energy management strategy based on wavelet transform fails to take into account the change of state of charge(SOC)of battery and supercapacitor.In order to give full play to the dynamic characteristics of various energy sources and ensure that the battery and supercapacitor work within the appropriate SOC range,on the basis of wavelet transform,the fuzzy logic control method is used to dynamically distribute the power output between fuel cell and battery,and the supercapacitor is given priority to braking energy recovery.The AVL cruise joint Simulink simulation platform is established to verify the effectiveness of the proposed strategy based on WLTC working condition.The results show that the strategy is feasible and can ensure that the battery and supercapacitor are in a more efficient SOC range.Compared with the strategy based on wavelet transform,the hydrogen consumption of the whole vehicle is reduced by 3.8%.