LiNi_(x)Co_(y)Al_(z)O_(2)锂离子电池SOC估算及衰减特性  

SOC evaluation and decay characteristics of LiNi_(x)Co_(y)Al_(z)O_(2) Li-ion battery

作　　者：闵凡奇 吕桃林 解晶莹[1,3,4] 高云智 MIN Fan-qi;LYU Tao-lin;XIE Jing-ying;GAO Yun-zhi(School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China;Shanghai Power&Energy Storage Battery System Engineering Technology Co.,Ltd.,Shanghai 200241,China;Shanghai Engineering Center of Power and Energy Storage Battery Systems,Shanghai 200245,China;State Key Laboratory of Space Power-Sources Technology,Shanghai Institute of Space Power-Sources,Shanghai 200245,China)

机构地区：[1]哈尔滨工业大学化工与化学学院,黑龙江哈尔滨150001 [2]上海动力储能电池系统工程技术有限公司,上海200241 [3]上海动力与储能电池系统工程技术研究中心,上海200245 [4]上海空间电源研究所空间电源技术国家重点实验室,上海200245

出　　处：《电池》2021年第3期225-228,共4页Battery Bimonthly

基　　金：国家重点研发计划资助项目(2018YFB0905300,2018YFB0905301);上海市科委项目(19DZ1207001,18DZ2284000)。

摘　　要：以LiNi_(x)Co_(y)Al_(z)O_(2)(NCA)体系锂离子电池为研究对象,建立具有多工况下普适性的开路电压(OCV)-荷电状态(SOC)曲线,估算电池在不同工况下的SOC。研究电池在变工况(1.00 C倍率循环、1.50 C转1.00 C倍率循环、2.00 C转1.00 C倍率循环等)下,正极活性材料容量(Qp)、负极活性材料容量(Qn)及活性锂容量(QLi)的变化趋势。在变工况条件下,相同低倍率工况(1.00 C倍率)的Qn和QLi衰减趋势相对一致。The LiNi_(x)Co_(y)Al_(z)O_(2)(NCA)system Li-ion battery was taken as the research object,the universal open circuit voltage(OCV)-state of charge(SOC)curve based on different working conditions was established,which could evaluate the SOC of the battery under different working conditions.The change trends of the capacities of positive active materials(Qp),negative active materials(Qn)and active lithium(QLi)were identified under variable working conditions(including 1.00 C rate cycle,1.50 C to 1.00 C rate cycle,2.00 C to 1.00 C rate cycle,etc.)of the battery.The relatively consistent change trends of Qn and QLi were concluded at the same low rate condition(1.00 C rate)under variable working conditions.

关 键 词：LiNi_(x)Co_(y)Al_(z)O_(2)(NCA) 锂离子电池 荷电状态(SOC) 衰减特性 活性锂 

分 类 号：TM912.9[电气工程—电力电子与电力传动]