VDA方形动力锂电池生热特性仿真分析与研究  

Simulation analysis and research on thermal characteristics of VDA primatic power lithium batteries

作　　者：叶科伟 向科峰[1] 李良超[1] YE Ke-wei;XIANG Ke-feng;LI Liang-chao(Manufacturing Process Testing Technology Key Laboratory of Ministry of Education,Southwest University of Science and Technology,Mianyang Sichuan 621000,China)

机构地区：[1]西南科技大学制造过程测试技术教育部重点实验室,四川绵阳621000

出　　处：《电源技术》2020年第4期514-517,581,共5页Chinese Journal of Power Sources

摘　　要：研究动力锂电池的生热特性是解决纯电动汽车电池包散热问题的前提,运用ANSYS有限元仿真软件,对车载VDA(德国汽车工业联合会)高能量密度卷绕式方形电池单体进行生热温度场仿真分析,模拟了在不同放电倍率和环境温度条件下,电池温度场的变化。结果表明,在自然对流换热条件下,随着环境温度增加,放电倍率增大,电池温升明显;电池的温差随着放电倍率的增加而增加,而随着环境温度的增加反而降低;电池内核温度最高,对比层叠式电芯热模型,卷绕式电芯的热量从几何中心向四周均匀分散。Studying the thermal characteristics of power lithium batteries is the premise to solve the heat dissipation problem of battery packs for pure electric vehicles.In this paper,ANSYS finite element simulation software was used to simulate and analyze the thermal field of high energy density coiled prismatic batteries in vehicle-mounted VDA(Verband der Automobilindustrie).The thermal field was simulated at different discharge rates and ambient temperatures,and the change of temperature field of battery under the different conditions of degree was observed.The results show that under natural convection heat transfer conditions,with the increase of ambient temperature,the discharge rate increases,and the temperature rise of the battery is obvious;the temperature difference of the battery increases with the increase of discharge rate,but decreases with the increase of ambient temperature;the core temperature of the battery is the highest;compared with the thermal model of cascaded core,the heat of the wound core is the highest.The quantities are evenly dispersed from the geometric center to all sides.

关 键 词：VDA方形电池 卷绕式 热分析 温度场 

分 类 号：TM912.9[电气工程—电力电子与电力传动]