期刊
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
卷 8, 期 1, 页码 407-419出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TTE.2021.3113945
关键词
Heating systems; Lithium-ion batteries; Transportation; Temperature; Resistance heating; Resistance; Integrated circuit modeling; Electric vehicles (EVs); high-frequency ac heating; lithium-ion (Li-ion) batteries; low temperature; thermal characteristics
资金
- National Key Research and Development Program of China [2020YFB1506802]
- National Natural Science Foundation of China [51977164]
- Hubei Provincial Key Research and Development Program [2020BAB131]
This article studies the characteristics of Li-ion batteries under low temperature and high-frequency AC excitation. The experimental and numerical results confirm the positive correlation between current frequency and root-mean-square value with heating rate.
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 degrees C to 5 degrees C in 7.33 min with an average electrochemical heat generation of 2.962 W.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据