期刊
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
卷 62, 期 4, 页码 1524-1533出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TEMC.2020.2996414
关键词
Impedance; Battery charge measurement; Batteries; Current measurement; Impedance measurement; Transmission line measurements; Voltage measurement; Battery impedance; electrochemical impedance spectroscopy (EIS); high-frequency (HF) impedance; shunt-through measurement method; vector network analyzer (VNA)
Lithium-ion (Li-ion) batteries in electric vehicles are exposed to high slew rate currents originating from the power electronics. Modern gallium nitride and silicon carbide-based power converters generate high switching frequencies, which propagate toward the battery. To predict the battery's impact on conducted emissions, we need to determine the battery's behavior over a high-frequency bandwidth. Traditional battery characterization techniques such as electrochemical impedance spectroscopy focus on frequencies below 10 kHz. This article proposes a novel method to characterize the battery beyond typical EIS frequencies. Developing a novel fixture to mount a single battery and applying proper de-embedding techniques enable a cell characterization from 1 kHz up to frequencies as high as 300 MHz using the 2-port shunt-through vector network analyzer (VNA) method. The cell's HF impedance originates from several loss processes such as skin effect, ionic shunt effect, and simple ohmic-inductive effects. First in literature, all these effects are measured and summarized in an equivalent electrical circuit model, which predicts the cell's impact on HF current pulses.
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