纯电动汽车磷酸铁锂电池组放电效率模型  

Dischaging efficiency model of LiFePO_4/C battery pack for electric vehicles

作　　者：黄万友[1] 程勇[1] 王宏栋 李闯 

机构地区：[1]山东大学能源与动力工程学院,山东济南250061 [2]山东久力电子科技有限公司,山东枣庄277800 [3]济南市电动汽车运营有限公司,山东济南250014

出　　处：《华中科技大学学报（自然科学版）》2012年第5期129-132,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目(2009AA11A118);山东大学研究生自主创新基金资助项目(yzc10123)

摘　　要：以320V/100A.h磷酸铁锂动力电池组为研究对象,在电动汽车动力电池性能测试试验台上对电池组容量效率、开路电压及电压性效率等特性参数进行了测试.采用二次多项式构建了电池组放电效率模型,描述放电效率与电流及电池荷电状态之间的关系.利用实车测试的电池组放电电流对建立的模型进行了验证,模型的放电效率计算值与实测值的最大相对误差为0.8%,建立的模型是有效的.The coloumbic efficiency, open circuit voltage, and voltaic efficiency of a 320 V/100 A· h LiFePO4/C battery pack was tested using a battery＇s test bench, and the relationship between the battery efficiency and the current and state of charge （SOC） was established. A quadratic model was developed to describe efficiency of the battery pack by ordinary least squares. The comparison results between the modeling results and real measured values indicate that the model is valid and the maximum relative error is within 0.8% at some typical points according to a real vehicle.

关 键 词：纯电动汽车 磷酸铁锂 电池组 放电效率 开路电压 

分 类 号：U469.72[机械工程—车辆工程]