基于动态内热源特性的车用锂离子动力电池温度场仿真及试验

doi:10.3901/JME.2016.08.141

机械工程学报 ›› 2016, Vol. 52 ›› Issue (8): 141-151.doi: 10.3901/JME.2016.08.141

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基于动态内热源特性的车用锂离子动力电池温度场仿真及试验

刘霏霏^{1, 2}, 兰凤崇^{1, 2}, 陈吉清^{1, 2}

1. 华南理工大学机械与汽车工程学院广州 510641;
2. 华南理工大学广东省汽车工程重点实验室广州 510641

出版日期:2016-04-15 发布日期:2016-04-15
作者简介:刘霏霏,女,1983年出生,博士研究生。主要研究方向为汽车环境适应性与热管理。E-mail：daisy-lff@163.com;兰凤崇,男,1959年出生,博士,教授,博士研究生导师。主要研究方向为汽车结构与安全技术。E-mail：fclan@scut.edu.cn;陈吉清(通信作者),女,1966年出生,博士,教授,博士研究生导师。主要研究方向为汽车结构与安全技术。E-mail：chjq@scut.edu.cn
基金资助:
国家自然科学基金(51375170)和广东省科技计划(2013B010405007,2013B090600024,2014B010125001)资助项目

Simulation and Experiment on Temperature Field of Lithium-ion Power Battery for Vehicle Based on Characteristic of Dynamic Heat Source

LIU Feifei^{1, 2}, LAN Fengchong^{1, 2}, CHEN Jiqing^{1, 2}

1. School of Mechanical & Automotive Engineering, South China University of Technology, Guangzhou 510641;
2. Guangdong Key Laboratory of Automotive Engineering, South China University of Technology, Guangzhou 510641

Online:2016-04-15 Published:2016-04-15

摘要/Abstract

摘要： 针对电动汽车动力电池在充放电工作过程中由于热量聚集而导致的温度场非均匀性问题,采用数值仿真与试验相结合的方法,基于电池内阻温升特性,考虑耦合正负极耳的热影响,建立生热速率的时变内热源模型,获得更加精确的电池温度场分布及其动态变化规律,并深入进行温度一致性分析。以某车用锂离子动力电池为样本,对电池单体及模块分别进行温升计算和三维温度场分析及相应的测试试验。结果表明：同一充/放电倍率下,放电温升明显大于充电温升,且电池最大温差随着倍率的增大而增大;电池的温升是一个随时间先增大后恒定的非线性变化过程,且随着放电倍率的增大电池温升速率越大;电池模块温度场并非电池单体温度场的简单叠加,且在相同充放电倍率下电池模块的热一致性不如电池单体。

关键词: 锂离子动力电池, 时变内热源模型, 温度场

Abstract: To research the non-uniform temperature field of power battery for electric vehicle during charge/discharge operation, using the method combining numerical simulation and experiment, based on the characteristic of temperature-rise in battery caused by its internal resistance, coupling thermal effect of anode and cathode, the time-varying heat source model is established to obtain more accurate and dynamic changing distribution of battery temperature field. A lithium-ion power battery for vehicle is taken as a sample, three-dimensional temperature field and temperature rise calculation of battery cell and module are analyzed, and the corresponding experiments are taken. Results show that, the temperature rise of discharging significantly greater than that of charging at the same charge/discharge rate, and the maximum temperature difference of cell increases with the rising of rate; The temperature rise of the battery is a nonlinear process that first increases then becomes constant varying with the time, and is higher with the increase of discharge rates; The temperature field of battery module is not a simple superposition with the temperature field of battery cells, and the thermal consistency of battery module is not as good as that of battery cell under the same charge/discharge rate.

Key words: lithium-ion power battery, temperature field, time-varying heat source model

中图分类号:

U464

刘霏霏, 兰凤崇, 陈吉清. 基于动态内热源特性的车用锂离子动力电池温度场仿真及试验[J]. 机械工程学报, 2016, 52(8): 141-151.

LIU Feifei, LAN Fengchong, CHEN Jiqing. Simulation and Experiment on Temperature Field of Lithium-ion Power Battery for Vehicle Based on Characteristic of Dynamic Heat Source[J]. Journal of Mechanical Engineering, 2016, 52(8): 141-151.

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基于动态内热源特性的车用锂离子动力电池温度场仿真及试验

Simulation and Experiment on Temperature Field of Lithium-ion Power Battery for Vehicle Based on Characteristic of Dynamic Heat Source

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