基于容量修正的安时积分SOC估算方法研究  

Study on Battery SOC Estimation by Ampere-hourIntegral Method with Capacity Correction

作　　者：罗勇[1,2,3] 祁朋伟 黄欢 王佳男 王毅 李沛然 Luo Yong;Qi Pengwei;Huang Huan;Wang Jianan;Wang Yi;Li Peiran(Chongqing University of Technology, Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Chongqing 400054;China Automotive Engineering Research Institute Co., Ltd., State Key Laboratory of Vehicle NVH and Safety Technology, Chongqing 400054;Department of Technology, Chongqing Tsingshan Industrial Co., Ltd., Chongqing 400054)

机构地区：[1]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054 [2]中国汽车工程研究院股份有限公司,汽车噪声振动和安全技术国家重点实验室,重庆400054 [3]重庆青山工业有限责任公司技术中心,重庆400054

出　　处：《汽车工程》2020年第5期681-687,共7页Automotive Engineering

基　　金：国家自然科学基金(51305475);汽车噪声振动和安全技术国家重点实验室2017年度开放基金(NVHSKL-201702);重庆市教委科学技术研究项目(KJQN201801143);重庆市自然科学基金面上项目(cstc2019jcyj-msxmX0308);重庆理工大学车辆学院科研支撑项目(CL2019-16)资助。

摘　　要：针对传统安时积分SOC估算法将电池容量视为定值而带来的误差,提出了带容量修正的安时积分法,它通过开路电压法确定电池组SOC初始值,再由电池组充放电试验得到不同倍率、库伦效率、温度等对电池容量的修正因子。仿真与试验结果表明,经改进的安时积分法可有效消除各种误差,估算结果精度较高,可用于SOC的实时估算或作为评价其它SOC估算策略的基准。In view of the error caused by that the SOC estimation algorithm based on traditional ampere-hour integral method regards battery capacity as constant,a modified ampere-hour integral method with capacity correction is proposed,in which the initial SOC value of battery is determined by open circuit voltage and then corrected by correction factors related to charge/discharge current,coulombic efficiency and temperature,obtained by the charge and discharge tests of battery pack.The results of simulation and tests show that the modified ampere-hour integral method can effectively eliminate various errors and get more accurate estimation results,so it can be used in real time estimation of SOC or as a reference for the evaluation of other SOC estimation strategies.

关 键 词：电池管理系统 SOC估算 安时积分法 充放电试验 

分 类 号：TM9[电气工程—电力电子与电力传动]