An Energy Management Strategy of Hybrid Energy Storage Systems for Electric Vehicle Applications
An Energy Management Strategy of Hybrid Energy Storage Systems for Electric Vehicle Applications
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DOI：
10.1109/tste.2018.2818259
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发表时间：
2018-03
影响因子：
8.8
通讯作者：
C. Zheng;Weimin Li;Q. Liang
中科院分区：
文献类型：
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作者：
C. Zheng;Weimin Li;Q. Liang
为了解决目前纯电动汽车储能系统（ESS）功率密度不足的问题，提出了一种由蓄电池和超级电容器组成的混合储能系统（HESS）。由于使用了两个ESS，因此应该对HESS进行能量管理。基于庞特里亚金最小值原理，提出了一种能量管理策略，在车辆行驶过程中将所需的推进功率瞬时分配给两个ESS，在车辆制动过程中将再生制动能量瞬时分配给两个ESS。所提出的能量管理策略的目标是最大限度地减少电动汽车的用电量，同时最大限度地延长电池寿命。对提出的能量管理策略和基于规则的能量管理策略进行了仿真研究。仿真结果表明，所提出的策略相比，基于规则的策略和单一ESS的情况下，在本研究中研究的三个典型的驾驶循环节省电力。同时，与其他两种情况相比，所提出的策略具有延长电池寿命的效果。
In order to mitigate the power density shortage of current energy storage systems (ESSs) in pure electric vehicles (PEVs or EVs), a hybrid ESS (HESS), which consists of a battery and a supercapacitor, is considered in this research. Due to the use of the two ESSs, an energy management should be carried out for the HESS. An optimal energy management strategy is proposed based on the Pontryagin's minimum principle in this research, which instantaneously distributes the required propulsion power to the two ESSs during the vehicle's propulsion and also instantaneously allocates the regenerative braking energy to the two ESSs during the vehicle's braking. The objective of the proposed energy management strategy is to minimize the electricity usage of the EV and meanwhile to maximize the battery lifetime. A simulation study is conducted for the proposed energy management strategy and also for a rule-based energy management strategy. The simulation results show that the proposed strategy saves electricity compared to the rule-based strategy and the single ESS case for the three typical driving cycles studied in this research. Meantime, the proposed strategy has the effect of prolonging the battery lifetime compared to the other two cases.