摘要
目前大多数电动汽车充电设备输出功率有限,所采用的充电方法较为简单,造成电动汽车的充电过程存在时间长、能耗高、温升大等问题。为了解决这些问题,设计了一种大功率充电设备,基于最优充电曲线,提出了一种电动汽车的多段恒流充电方法,并将此充电方法应用于大功率充电设备中。首先,设计了大功率充电设备的电气结构图;其次,根据动力电池的充电特性,给出了多段恒流充电方法的实现流程;然后,在大功率充电设备上,与传统的恒流充电方法和恒流恒压充电方法进行了实验对比分析。结果表明,多段恒流充电方法与传统的1C恒流充电和1C恒流恒压充电方法相比,能够缩短5%以上的充电时间,与传统的2C恒流充电方法和2C恒流恒压充电相比,可以降低50%以上的充电温升,并且能够在比较短时间内使电池容量达到80%,满足电动汽车快速充电的要求。因此,本文提出的方法能够均衡电动汽车动力电池的充电时间和充电温升,延长电动汽车动力电池的使用寿命,综合性能更优。
At present,most electric vehicle charging devices have limited output power and the charging methods used are relatively simple,which causes problems such as long charging time,high energy consumption and high temperature rise in the charging process of electric vehicles.In order to solve these problems,this paper designs a highpower charging equipment and proposes a multi-stage current charging method for electric vehicles based on the optimal charging curve,and this charging method is applied to the high-power charging equipment.Firstly,the electrical structure diagram of the high-power charging equipment is designed;secondly,the implementation process of the multi-stage current charging method is given according to the charging characteristics of the power battery;then,the experimental comparison and analysis with the traditional constant current charging method and constant current and constant voltage charging method are conducted on the high-power charging equipment.The results show that the multi-stage current charging method can shorten the charging time by more than 5%compared with the traditional 1 C constant current charging and 1 C constant current and constant voltage charging methods,reduce the charging temperature rise by more than 50%compared with the traditional 2 C constant current charging method and 2 C constant current and constant voltage charging,and make the battery capacity reach 80%in a relatively short time,which can meet the requirements of fast charging of electric vehicles.Therefore,the method proposed in this paper can balance the charging time and charging temperature rise of electric vehicle power battery,prolong the service life of electric vehicle power battery,and have better overall performance.
作者
王义
刘欣
高德欣
Wang Yi;Liu Xin;Gao Dexin(School of Automation and Electronic Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)
出处
《电子测量技术》
北大核心
2021年第24期20-25,共6页
Electronic Measurement Technology
基金
国家自然科学基金(61673357)
山东省重点研发计划项目(公益类)(2019GGX101012)
山东省高等学校科学技术计划项目(J18KA323)
山东省研究生导师指导能力提升项目(SDYY18092)资助。
关键词
电动汽车
大功率充电设备
动力电池
最优充电曲线
多段恒流充电方法
electric vehicle
high power charging equipment
power battery
optimal charging curve
multi-stage current charging method
