材料科学
发热
均方根
电化学
锂(药物)
核工程
低频
锂离子电池
热的
离子
电池(电)
分析化学(期刊)
功率(物理)
激发
化学
电极
电气工程
热力学
物理
物理化学
内分泌学
有机化学
工程类
医学
色谱法
天文
作者
Zhongxiaobang Hu,Yang Li,Furong Liu,Bo Zhao,Weibo Li,Ruixin Yang,Changjun Xie,Ying Shi
出处
期刊:IEEE Transactions on Transportation Electrification
日期:2022-03-01
卷期号:8 (1): 407-419
被引量:15
标识
DOI:10.1109/tte.2021.3113945
摘要
At low operating temperatures, the power capability and charging/discharging capacity of lithium-ion (Li-ion) batteries can decay rapidly. Therefore, it is essential to preheat the Li-ion batteries in advance of the normal operations of a battery electric vehicle. High-frequency ac preheating methods are advantageous to achieve a miniaturized and lightweight design. In this article, a self-heating circuit topology is used for studying the characteristics of Li-ion batteries at low temperatures and under high-frequency ac excitation. The thermal behaviors of Li-ion batteries under high-frequency ac excitations are comprehensively analyzed with an improved heat generation model. Experimental results exhibit that heat generation due to electrochemical reactions has a significant influence on self-heating rates under the high-frequency ac excitation, and the heating rate is positively correlated with the current frequency and root-mean-square (rms) value. Specifically, when the current frequency is 90 kHz and the rms value is 3.51 A or 1.17 C, validated by experiment and numerical simulation, a 2.9-Ah 18650 Li-ion cell can be heated up from −20 °C to 5 °C in 7.33 min with an average electrochemical heat generation of 2.962 W.
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