电动汽车直流充电时间的策略研究

A Strategic Study on the DC Charging Time of Electric Vehicles

现阶段下,国内电动车辆动力电池包逐渐向高电压、大倍率趋势发展。而国内充电桩由于型号多种多样,性能参数也各不相同,无法保证达到车辆的充电需求。本文介绍了直流充电系统和直流充电流程,结合电动车现有直流充电技术,提出将充电桩性能加入车辆充电控制策略中。基于最大充电功率原则分析车辆进入降压充电的时机,并选取市面五种不同性能的充电桩,利用仿真平台分析该策略对车辆充电时间的影响。仿真结果表明该策略能一定程度的缩短车辆充电时间,对优化电动车充电功能具备一定的参考意义。

At this stage,the power battery pack of domestic electric vehicles is gradually developing towards high voltage and large rate.However,due to the variety of models and performance parameters of domestic charging piles,it is impossible to guarantee that the charging needs of vehicles can be met.In this paper,the DC charging system and DC charging process are introduced.And combined with the existing DC charging technology of electric vehicles,the performance of charging piles is proposed to be added to the vehicle charging control strategy.Based on the principle of maximum charging power,the timing of vehicle step-down charging is analyzed,and five charging piles with different performance on the market are selected,and the impact of this strategy on vehicle charging time is analyzed by using the simulation platform.The simulation results show that the proposed strategy can shorten the charging time of the vehicle to a certain extent,which has certain reference significance for optimizing the charging function of the electric vehicle.