HEV用功率型三元锂电池SOC估算模型及验证方法研究  

Research on SOC Prediction Model and Verification Methods of High Power Ternary Traction Li-Ion Batteries for Hybrid Electric Vehicles

作　　者：徐爱琴 刘舒龙 刘微 谢功山 XU Aiqin;LIU Shulong;LIU Wei;XIE Gongshan(New Energy Vehicle Technology Anhui Provincial Technology Innovation Center,Ywei Automotive Technology Co.,Ltd.,Hefei 230601,China)

机构地区：[1]新能源汽车技术安徽省技术创新中心钇威汽车科技有限公司,安徽合肥230601

出　　处：《汽车电器》2024年第5期9-11,17,共4页Auto Electric Parts

摘　　要：准确预测动力电池SOC是混合动力汽车产品技术开发的难点,文章介绍一种基于功率型三元锂电池的电池等效模型的SOC估算方法。基于Ah积分结果运算电池SOC,并通过龙伯格方程修正实现SOC估算误差收敛。试验结果表明,25℃下该方法预测功率型三元锂电池的平均误差≤4%,实现SOC误差收敛,满足大部分电池系统SOC估算精度要求。The accurate prediction of the battery SOC is one of most difficult points in HEV developments.A equivalent-circuit model for high power ternary traction Li-ion batteries is discussed in this paper.Based on the ampere-time integration,SOC is calculated and corrected by Luenberger observer to make sure that the error weaken is implemented.The result of the test shows that,the SOC predict average accuracy of high-power ternary system is≤4%at 25℃,which meets the SOC accuracy requirements of most battery systems.

关 键 词：功率型 三元锂电池 SOC估算 电池等效模型 误差收敛 

分 类 号：U463.633[机械工程—车辆工程]