欢迎来到清华大学汽车工程系电化学动力源研究室!
您的位置:首页 > 科研成果 > 发表论文
 
科研成果
通知通告
 
发表论文

Internal Heating of Lithium-ion Batteries Using Alternating Current Based on the Heat Generation Model in Frequency Domain

发布时间:2015-08-22 浏览次数:


Jianbo Zhang, Hao Ge, Zhe Li, Mingzhan Ding, Internal Heating of Lithium-ion Batteries Using Alternating Current Based on the Heat Generation Model in Frequency Domain, Journal of Power Sources, 2015, 273: 1030-1037.
\


【Abstract】This study develops a method to internally preheat lithium-ion batteries at low temperatures with si-nusoidal alternating current (AC). A heat generation rate model in frequency domain is developed based on the equivalent electrical circuit. Using this model as the source term, a lumped energy conservation model is adopted to predict the temperature rise. These models are validated against the experimental results of preheating an 18650 cell at different thermal insulation conditions. The effects of current amplitude and frequency on the heating rate are illustrated with a series of simulated contours of heating time. These contours indicate that the heating rate increases with higher amplitude, lower frequency and better thermal insulation. The cell subjected to an alternating current with an amplitude of 7 A (2.25 C) and a frequency of 1 Hz, under a calibrated heat transfer coefficient of 15.9 W m2 K1, can be heated from 20  Cto5  C within 15 min and the temperature distribution remains essentially uniform. No capacity loss is found after repeated AC preheating tests, indicating this method incurs little damage to the battery health. These models are computationally-efficient and can be used in real time to control the preheating devices in electric vehicles.
 

首页 | 研究室简介 | 课题组成员 | 科研成果 | 新闻动态 | 通知公告 | 照片 | 联系我们

地址:北京市海淀区清华大学李兆基科技大楼 邮编:100084 电话:+86-10-6278-6918 邮箱:leizhao@mail.tsinghua.edu.cn
CopyRight 2010-2016 清华大学汽车工程系电化学动力源研究室 版权所有 京ICP吧备123456号