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浙江大学学报(工学版)
浙江大学学报(工学版)  2021, Vol. 55 Issue (10): 1986-1992    DOI: 10.3785/j.issn.1008-973X.2021.10.021
电气工程     
大型软包锂离子电池的热物性实验研究
王帅林1(),盛雷1,2,齐丽娜3,方奕栋1,李康1,苏林1,*()
1. 上海理工大学 能源与动力工程学院，上海 200093
2. 上海理工大学 机械工程学院，上海 200093
3. 兰考县第三高级中学物理组，河南 开封 475300
Experimental investigation on thermophysical parameters of large-format pouch lithium-ion battery
Shuai-lin WANG1(),Lei SHENG1,2,Li-na QI3,Yi-dong FANG1,Kang LI1,Lin SU1,*()
1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
2. School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
3. Physics Teachers’ Office, The Third Senior High School of Lankao, Kaifeng 475300, China
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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 °C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.
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    
Abstract:

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 °C 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.
Key words: large-scale pouch lithium-ion battery    specific heat capacity at constant pressure    thermal conductivity    quasi-steady-state heat conduction principle
收稿日期: 2020-12-09 出版日期: 2021-10-27
CLC:  TM 911  
通讯作者: 苏林     E-mail: mo12134@163.com;linsu@usst.edu.cn
作者简介: 王帅林（1995—），男，硕士生，从事汽车热管理的研究. orcid.org/0000-0003-4108-7539. E-mail： mo12134@163.com
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王帅林
盛雷
齐丽娜
方奕栋
李康
苏林

引用本文:

王帅林,盛雷,齐丽娜,方奕栋,李康,苏林. 大型软包锂离子电池的热物性实验研究[J]. 浙江大学学报(工学版), 2021, 55(10): 1986-1992.

Shuai-lin WANG,Lei SHENG,Li-na QI,Yi-dong FANG,Kang LI,Lin SU. Experimental investigation on thermophysical parameters of large-format pouch lithium-ion battery. Journal of ZheJiang University (Engineering Science), 2021, 55(10): 1986-1992.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2021.10.021    或    https://www.zjujournals.com/eng/CN/Y2021/V55/I10/1986

图 1  电池受热分析图
参数 数值
尺寸（长×宽×高）/mm 300×100×11.2
质量/g 781.50
标称容量/（A·h） 55
标称电压/V 3.6
放电截止电压/V 2.8
充电截止电压/V 4.2
工作温度/°C 充电 0~45，放电 ?20~60
表 1  软包三元锂离子电池的规格参数
图 2  热物性参数测试实验装置及热电偶布置图
装置 型号/材质 精度
保温盒 EPE珍珠棉（700×300×180 mm3） ?
恒温箱 HS-250 L ±0.5 oC
稳压电源 DC 30 V10 A 0.001 A，0.01 V
薄膜加热器 厚0.22 mm 1%
热电偶 T型 0.4%
热流计 LR8432（53.5 mm×10 mm×0.28 mm） 2%
表 2  热物性参数测试实验设备及测量装置规格表
图 3  电池温变及热流损失密度曲线图
图 4  电池冷、热面间温差及平均温变率
图 5  比定压热容与温度间的曲线关系
图 6  导热系数随温度的变化曲线图
图 7  有机玻璃实物图（敷有加热膜）
热物性参数 cp /（J ·kg?1·K?1） κx /（W·m?1·K?1）
参考值 1464 0.180
测量值 1351 0.175
表 3  有机玻璃热参数测试误差分析
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