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锂离子电池热特性实验与仿真分析

发表时间:2017-06-30  浏览量:171  下载量:49
全部作者: 候雯娜,仝猛,张赢丽,郭立刚,陈欢
作者单位: 长安大学工程机械学院
摘 要: 以钴酸锂单体电池为研究对象,进行内阻特性实验和温升特性实验。通过内阻特性实验得到电池内阻和电池荷电状态(state of charge,SOC)的关系,为后续电池热效应模型的建立作准备;利用温升特性实验得到的数据验证电池热效应模型的准确性。采用Fluent软件对单体锂离子动力电池生热进行数值模拟,通过数值模拟获得的电池表面最低温度与实验数据比较,得出结论:同样工况下模拟所得温度与实验测得的电池温度变化趋势基本一致,小电流放电时电池表面的温度偏差并不是很大,说明使用研究中所采用的电池热模型进行数值仿真能够较好地反映较低放电电流时锂离子动力电池的温升情况。研究结果对电动汽车电池组热模型的建立和冷却结构设计有重要的参考价值。
关 键 词: 二次能源;锂离子电池;热特性实验;温度分布;仿真
Title: Thermal characteristics experiment and simulation of lithium-ion battery
Author: HOU Wenna, TONG Meng, ZHANG Yingli, GUO Ligang, CHEN Huan
Organization: School of Construction Machinery, Chang’an University
Abstract: In this paper, both the internal resistance characteristic experiment and the temperature rise characteristic experiment were done based on Li-Co lithium-ion battery cell. The relationship between internal resistance and state of charge (SOC) of the battery cell was obtained through the internal resistance experiment. This is in preparation for the subsequent establishment of battery thermal effect model. The accuracy of the thermal effect model was verified by the data of the temperature rise characteristic experiment. The Fluent software was used to simulate the heat generation of Li-Co lithium-ion battery cell. By comparing the lowest temperature obtained by the numerical simulation of lithium-ion battery and the experimental data, we concluded that the simulated temperature trend and the measured temperature trend of the battery are basically the same under the same conditions. And the temperature deviation of the battery surface is not great when a small current discharge. It is shown that the numerical simulation using the battery thermal model in this paper can better reflect the temperature rise situation of lithium-ion battery during the lower discharge current, which is of great reference value for the establishment of the thermal model and the design of the cooling structure of the electric vehicle battery.
Key words: secondary energy; lithium-ion battery; thermal characteristics experiment; temperature
发表期数: 2017年6月第12期
引用格式: 候雯娜,仝猛,张赢丽,等. 锂离子电池热特性实验与仿真分析[J]. 中国科技论文在线精品论文,2017,10(12):1297-1309.
 
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