一种双电源电动汽车的能量管理策略

An Energy Management Strategy of the Pure Electric Vehicles Under Dual-Energy Source

纯电动汽车采用锂电池+超级电容的双电源,供电方案是解决其动力性、经济性不足的有效方法。但双电源纯电动车的能量分配策略关系到整车电池安全性等各方面,为此以磷酸铁锂电池组+超级电容器组混合双电源电动汽车测试平台为研究对象,提出一种基于逻辑门限的能量分配策略,并完成了不同工况下系统能量分配策略的测试。实验结果表明:所提出的能量分配策略在双电源电动汽车的制动、加速、巡航等阶段能合理地分配各部分能量,提高能量回收效率和整车动力性能。

The power supply scheme of the pure electric vehicle with lithium battery and super capacitor which is an effective method to solve the problem of its power and economic performances, but the energy distribution strategy of the dual energy electric vehicle is related to the safety of the battery. For this purpose, a hybrid electric vehicle test platform with a LiFePO4 battery pack mixed uhracapacitors is chosen as research object and an energy allocation strategy based on logic threshold is proposed in this paper. The system testing of the energy distribution strategy under different working conditions is finished. The Results show that the energy allocation strategy based on the logic threshold can reasonably allocate the energy and improve the performance of the whole vehicle in the process of braking, accelerating and cruising.