计及电池寿命的电动汽车经济型巡航控制
首发时间:2018-11-06
摘要:经济型巡航控制策略通过优化巡航车速谱,使内燃机汽车的动力总成工作在最佳工作效率区能够降低燃油消耗。但对于具有再生制动功能的电动汽车,其不一定具有与内燃机汽车相同的经济型巡航策略。故本文提出了一种纯电动汽车在考虑坡度变化时的高速巡航条件下,规划最优经济型车速谱的方法以降低能量损耗,同时兼顾电池寿命,通过降低频繁的高倍率充放电减轻电池寿命的衰减速度。仿真结果表现,提出的最优经济型巡航控制策略在降低能耗的同时,能够大幅度延长电池寿命并保持更短的通行时间。
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Energy-oriented Cruising Control of Electric Vehicle Considering Battery Aging
Abstract:Eco-driving strategies for vehicles with conventional powertrain have been studied for years to reduce the fuel consumption by optimizing the profile of driving velocity. For electric vehicles with regenerative braking, the speed profile with best energy efficiency maybe different. This paper proposes an energy-oriented driving strategy to realize eco-cruising on highway with varying slopes for Electric Vehicles (EVs). However, the resulted speed profile with varying velocity may cause high charge and discharge rate of the battery, resulting in rapid battery fading. To extend the battery life, we make a tradeoff between the energy consumption and wear of the battery by formulating an optimal control problem. An indirect optimal control method is implemented to derive the optimal control rule while considering the driving comfort and travel time.
Keywords: Electric vehicles Energy-oriented Battery aging Eco-driving
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