动力锂离子电池充电过程热模拟及影响因素灰色关联分析  

Thermal simulation on dynamic lithium-ion battery during charge and its grey relational analysis

作　　者：鄂加强[1,2] 龙艳平[1] 王曙辉[1,2] 蔡皓[1,2] 胡小峰[1] 朱蓉甲[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]湖南大学机械与运载工程学院,湖南长沙410082

出　　处：《中南大学学报（自然科学版）》2013年第3期998-1005,共8页Journal of Central South University:Science and Technology

基　　金：国家重点院校基础研究基金资助项目(531107040300);国家"十一五"计划自然科学基金资助项目(2006BAJ04B04)

摘　　要：针对不同充电工况,建立动力锂离子电池充电过程三维热模型,并对不同对流传热系数、辐射系数、环境温度和充电电流等影响因素下动力锂离子电池充电过程产热和散热机理进行模拟。研究结果表明:动力锂离子电池内部升温速率在充电电流增大到某值前基本不变,随后将随充电电流增大而增大;环境温度越高,充电完毕后动力锂离子电池内部温度越高;强制换热时,辐射系数的变化对电池内部温度影响不大,而自然对流换热时,热辐射对内部温度影响明显;充电电流关联度(0.79253)>环境温度关联度(0.65804)>对流换热系数关联度(0.63388)>热辐射系数关联度(0.51103)。The three-dimensional model of a dynamic lithium-ion battery was established in different work conditions during charging process,and mechanism of heat generation and heat dissipation of dynamic lithium ion battery were simulated in charging at different convection coefficients,emissivities,ambient temperatures and charging currents.The results show that the temperature rising rate is little influenced by the charging current below a certain charging current, otherwise,it increases obviously with the increase of the current.The maximum temperature inside the dynamic lithium ion battery increases with the increase of the ambient temperature.The influence of thermal emissivity on the temperature inside the dynamic battery on the condition of forced convection is not obvious,but it has great influence on the temperature inside the dynamic battery on the natural convection.The grey relational coefficient of charging current is 0.792 53,playing the most important role in thermal behavior of the battery,while the grey relational coefficient of heat transfer is 0.658 04,the grey relational coefficient of ambient temperature is 0.633 88,and thermal emissivity has a minimum influence with its grey relational coefficient 0.511 03.

关 键 词：动力锂离子电池 充电 数值模拟 灰色关联分析 

分 类 号：TM911[电气工程—电力电子与电力传动]