Consideration of Magnetic dipole Orientation in liquid detected by Metallic Contaminants Detection System using High-Tc SQUID
Consideration of Magnetic dipole Orientation in liquid detected by Metallic Contaminants Detection System using High-Tc SQUID
复制标题
使用高温 SQUID 金属污染物检测系统检测液体中磁偶极子取向的考虑
DOI：
10.1109/tasc.2021.3135056
复制
发表时间：
2022
影响因子：
1.8
通讯作者：
K. Hayashi and T. Ohtani
中科院分区：
文献类型：
--
作者：
S. Tanaka;Member;M. Sagawa;K. Hayashi and T. Ohtani
随着汽车的电气化，高性能锂离子（Li-ion）电池的市场正在迅速增长。电池中10 μm量级的小金属颗粒的存在很可能导致故障；因此，消除它们是很重要的。我们开发了一种原型系统，用于检测锂离子电池液体成分中的金属异物，该系统使用高温超导射频超导量子干涉装置，这是一种高灵敏度的磁传感器。测量了磁化金属块穿过超导量子干涉器件（SQUID）下方沟槽时的信号波形。我们发现波形取决于探测时磁偶极子的方向，可以大致分为六类来解释所有的实验结果。根据样品的等效球面直径绘制每个样品的最大星等。结果表明，信号强度与样品直径的立方成正比，检测到直径大于φ20 × 30μm（等效球直径23μm）的颗粒，信噪比≥3。
The market for high-performance lithium-ion (Li-ion) batteries is growing rapidly as automobiles become electrified. The presence of small metallic particles of the order of 10 μm in a battery is likely to cause failure; therefore, it is important to eliminate them. We have developed a prototype system for detecting metallic foreign matter in liquid components for Li-ion batteries using a high-temperature superconducting radio-frequency superconducting quantum interference device, which is a highly sensitive magnetic sensor. Signal waveforms of a magnetized metallic piece passing through a trench located below the superconducting quantum interference device (SQUID) were measured. We found that the waveform depended on the direction of the magnetic dipole at the time of detection and could be roughly divided into six categories to explain all the experimental results. The maximum magnitude obtained for each sample was plotted against the equivalent spherical diameter of the sample. Our results indicate that the signal intensity was proportional to the cube of the sample diameter and that particles larger than φ20 × 30μm (equivalent spherical diameter 23μm) were detected with signal-to-noise ratio ≥3.