摘要
针对大型软包锂离子电池热物性参数的测定问题,提出适用于该型电池的热参数表征方法.基于准稳态导热原理,建立电池的传热理论模型.开展实验研究电池的比定压热容和导热系数与温度的依变关系,分析热损对测试结果的影响,对测试方法的有效性进行验证.结果表明,电池比定压热容随着温度的升高而线性增大,导热系数受温度的影响较小.在900 s内可以测得电池热参数在10~60℃下的变化状况,实验验证结果显示测算精度高于92.3%,具有测算周期短、准确度高和测试灵活等优势.
A thermal parameter characterization method suitable for this battery was proposed aiming at the problem of the thermophysical parameters determination for large-format pouch lithium-ion battery cell.A theoretical model of heat transfer of the battery was established based on the principle of quasi-steady-state heat conduction.Experiments were conducted to analyze the dependence of the specific heat capacity at constant pressure and thermal conductivity of the battery on the temperature.The influence of heat loss on the test results was analyzed,and the validity of the test method was verified.Results show that the cell specific heat increases linearly as the increasing temperature,and the temperature has a minor effect on the cell thermal conductivity.The thermal parameters in the temperature range of 10~60℃ for the cell can be measured within 900 s.The experimental results show that the test precise overtops 92.3%,which has the advantages of short measurement cycle,high accuracy and flexible testing.
作者
王帅林
盛雷
齐丽娜
方奕栋
李康
苏林
WANG Shuai-lin;SHENG Lei;QI Li-na;FANG Yi-dong;LI Kang;SU Lin(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Physics Teachers’Office,The Third Senior High School of Lankao,Kaifeng 475300,China)
出处
《浙江大学学报(工学版)》
EI
CAS
CSCD
北大核心
2021年第10期1986-1992,共7页
Journal of Zhejiang University:Engineering Science
关键词
大型软包锂离子电池
比定压热容
导热系数
准稳态导热原理
large-scale pouch lithium-ion battery
specific heat capacity at constant pressure
thermal conductivity
quasi-steady-state heat conduction principle