纯电动轻型商用车降能耗关键技术及应用

Key Technologies and Applications of Energy Consumption Reduction for Pure Electric Light Commercial Vehicles

为提升某纯电动轻型商用车的续驶能力,从减少功率消耗和增加滑行回馈功率两个维度降低整车百公里电耗。首先,针对节能(ECO)模式,提出基于车辆不同使用场景和工况的节能控制技术,显著降低全场景下的整车能耗。其次,针对商用车空、满载滑行能量回收减速度差异大的问题,提出基于整车质量进行能量回收控制,实现了车辆不同载荷下具有相同的滑行减速度,以回收更多能量。然后,针对滑行能量回收通常以低附着系数路面为设计基础的现状,提出基于路面附着系数自适应调整滑行能量回收的方法。最后,对该纯电动轻型商用车进行实际道路测试,结果表明,ECO模式下百公里电耗降低2.9%,针对开启空调和开启车门场景,百公里电耗降低2.1%,基于整车质量的能量回收策略实现了百公里电耗降低2.7%。

In order to improve the vehicle driving range of a pure electric light commercial vehicle,this paper proposes to reduce the electric power consumption per 100 kilometers by reducing power consumption and increasing coasting energy recovery power.Firstly,for ECO energy-saving mode,the paper proposes the energy-saving control technology based on different vehicle usage scenarios and working conditions,which significantly reduces the energy consumption of the vehicle in the whole scenario.Secondly,in the view of the coasting energy recovery deceleration of commercial vehicles with empty and full load varies greatly,the paper proposes the energy recovery control based on the vehicle mass to achieve the same coasting deceleration under different loads to recover more energy.Then,for the problem that coasting energy recovery is usually designed with low adhesion coefficient road surface,the paper proposes adaptive adjustment of coasting energy recovery based on road adhesion coefficient.Finally,the pure electric light truck is tested on real road.The results show that the ECO mode reduces the electricity consumption per 100 kilometers by 2.9%,and by 2.1%for scenarios of turning on the air conditioning and opening the car door.The energy recovery strategy based on the vehicle’s mass shows a 2.7%reduction in electricity consumption per 100 kilometers.