三元软包锂离子动力电池热特性测量及应用

doi:10.12028/j.issn.2095-4239.2018.0211

储能科学与技术 ›› 2019, Vol. 8 ›› Issue (2): 284-291.doi: 10.12028/j.issn.2095-4239.2018.0211

三元软包锂离子动力电池热特性测量及应用

黄伟, 文华, 李亚胜

南昌大学机电工程学院, 江西南昌 330031

收稿日期:2018-10-21 修回日期:2018-11-17 出版日期:2019-03-01 发布日期:2018-11-20
通讯作者: 文华。E-mail:wenhua25@ncu.edu.cn
作者简介:黄伟(1991-),男,硕士研究生,研究方向为锂离子电池热分析,E-mail:1946375423@qq.com
基金资助:
国家自然科学基金项目（51762034）

Measurements and application of thermal characteristics of soft-packed NCM lithium-ion power battery

HUANG Wei, WEN Hua, LI Yasheng

School of Mechanic & Electronic Engineering, Nanchang University, Nanchang 330031, Jiangxi, China

Received:2018-10-21 Revised:2018-11-17 Online:2019-03-01 Published:2018-11-20

摘要/Abstract

摘要： 锂离子电池的极化内阻是不可逆热测试的关键参数。为了更准确地计算极化内阻，针对三元软包锂离子动力电池，进行了HPPC测试、熵热系数测试、充放电温升测试，采用两种方法对极化内阻进行了计算，一种是通过电压变化量除以电流得到，另一种是通过建立二阶RC模型，结合HPPC测试工况辨识得到。根据两种方法得到的极化内阻，结合Bernardi生热速率模型公式对电池进行了1C充电和0.5C、1C、2C放电下的温度场仿真，并与红外热成像仪记录到的温度分布进行了对比。结果表明：根据二阶RC模型得到的极化内阻进行的仿真与实验数据吻合较好，说明利用二阶RC模型得到的极化内阻更加适用于电池持续充放电过程中的热分析。模型很好地模拟了电池不同充放电倍率下的温度场信息，对电池热分析及热管理可起到指导作用。

关键词: 锂离子动力电池, 极化内阻, 二阶RC模型, 红外热成像仪, 温度场仿真

Abstract: The polarization resistance of lithium-ion batteries is the key parameter for irreversible heat testing. In order to obtain more precise results of polarization resistance, hybrid pulse power characterization (HPPC) test, entropy thermal coefficient test, and the temperature measurements of the cell in charging and discharging were carried out for a soft-packed NCM lithium-ion battery. Two methods were used to calculate the polarization resistance. One was obtained by dividing the amount of voltage change by the current, the other was identified by establishing a second-order RC model combined with the HPPC test condition. The temperature field simulation under 1C charging and 0.5C, 1C and 2C discharge was carried out by combining with Bernardi's heat generation rate model formula, and compared with the temperature distribution recorded by the infrared thermal imager. The results show that the polarization resistance obtained by second-order RC model is in good agreement with the experimental data, which indicates that the polarization resistance obtained by the second-order RC model is more suitable for the thermal analysis of the battery's continuous charge-discharge process. The model simulates well the temperature field information under different charge-discharge ratios of the battery, which plays a key role in the thermal analysis and thermal management of the battery.

Key words: lithium-ion power battery, polarized internal resistance, second-order RC model, infrared thermal imager, temperature field simulation

中图分类号:

TM911

黄伟, 文华, 李亚胜. 三元软包锂离子动力电池热特性测量及应用[J]. 储能科学与技术, 2019, 8(2): 284-291.

HUANG Wei, WEN Hua, LI Yasheng. Measurements and application of thermal characteristics of soft-packed NCM lithium-ion power battery[J]. Energy Storage Science and Technology, 2019, 8(2): 284-291.

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三元软包锂离子动力电池热特性测量及应用

Measurements and application of thermal characteristics of soft-packed NCM lithium-ion power battery

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