摘要
电池荷电状态(SOC)是衡量电动汽车剩余电量的重要参数,常用的SOC估算方法多以容量作为参照标准,因此容量的准确度直接影响SOC的准确性。由于电动汽车行驶过程中,电流波动大,工作环境温度不稳定,充放电频繁等因素,引起锂离子电池的容量不能维持稳定不变,进而导致SOC估算不准确。本论文结合锂离子电池工作原理,着重从充放电倍率、温度、自放电、循环耐久等四个方面,浅要分析了这些因素对电动汽车SOC的影响。
The battery charged state of(SOC)is one of the important parameters to measure the electric car battery,commonly used SOC estimation method with more capacity as a reference standard,so the accuracy of the capacity directly affects the accuracy of the SOC.Due to the electric car driving process,the current volatility,working environment temperature is not stable,factors such as charge and discharge frequently,caused the capacity of lithium ion battery can't maintain stable,leading to SOC estimation is not accurate.Based on the working principle of lithium ion battery,this paper focuses on four aspects,such as charging and discharging ratio,temperature,self-discharge and cycle durability,and analyzes the influence of these factors on electric vehicle SOC.
作者
姚朝华
张伟
杨玉梅
韩友国
吴洪涛
许伶莉
YAO Zhao-hua;ZHANG Wei;YANG Yu-mei;HAN You-guo;WU Hong-tao;XU Ling-li(chery new energy automobile technology co.,LTD.,wuhu anhui 241002,China)
出处
《科技视界》
2018年第2期6-7,共2页
Science & Technology Vision
关键词
电动汽车
锂电池
SOC估算
Electric vehicle
Lithium batteries
SOC estimation
作者简介
姚朝华(1986—),女,安徽人,汉族,硕士,奇瑞新能源汽车技术有限公司试验工程师,研究方向为动力电池
