Development of Metallic Contaminant Inspection System Using High-Tc rf-SQUID for Li-ion Battery Liquid Components

Tanaka, Saburo; Sagawa, Masaru; Hayashi, K.; Ohtani, Takeyoshi

doi:10.1109/tasc.2020.2986315

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…The SQUID washer had an outer dimension of 9 × 9 mm square, with a 100-µm square hole in the center of the pattern. The SQUID inductance Ls and the effective area Aeff were estimated to be 157 pH and 0.40 mm 2 , respectively [5].…”

Section: ) Rf-squid Magnetometer and Electronicsmentioning

confidence: 99%

“…It is also important to reduce the SNR 3 level by improving the magnetic flux noise of the SQUID with bandwidth between 10 and 100 Hz. Another option is to prepare several SQUIDs and place them around the trench [5].…”

Section: ) Dependence Of Depthmentioning

confidence: 99%

“…We have developed a system for detecting metallic foreign matter in solids using a high-temperature superconducting (HTS) radio-frequency (rf) superconducting quantum interference device (SQUID), a type of ultra-sensitive magnetic sensor, and we have recently been adapting this system for use in liquid components for batteries such as binders and slurries [1][2][3][4]. This has included evaluating the distance dependence of sensitivity by pulling a sample of metallic foreign matter directly under the SQUID without flowing liquid [5].…”

Section: Introductionmentioning

confidence: 99%

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Consideration of Magnetic Dipole Orientation in Liquid Detected by Metallic Contaminants Detection System Using High-Tc SQUID

Tanaka¹,

Sagawa²,

Hayashi³

et al. 2022

IEEE Trans. Appl. Supercond.

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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 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 µm × 30 µm (equivalent spherical diameter 23 µm) were detected with signal-to-noise ratio ≥3.

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Section: ) Rf-squid Magnetometer and Electronicsmentioning

confidence: 99%

Section: ) Dependence Of Depthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Consideration of Magnetic Dipole Orientation in Liquid Detected by Metallic Contaminants Detection System Using High-Tc SQUID

Tanaka¹,

Sagawa²,

Hayashi³

et al. 2022

IEEE Trans. Appl. Supercond.

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“…The first JJ type utilizes a HTS bicrystal grain boundary. It was prepared by using a 200 nm-thick YBCO film on the bicrystal SrTiO 3 substrate with an angle of 36.8 • (THEVA, Germany) at Toyohashi University of Technology [52]. Figure 2 shows a photograph of the junction with a width of 4 µm.…”

Section: Jj Preparationmentioning

confidence: 99%

Standard measurement method for normal state resistance and critical current of resistively shunted Josephson junctions

Ohkubo¹,

Uehara²,

Beyer³

et al. 2022

Supercond. Sci. Technol.

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An important parameter of Josephson junctions (JJs) is the product of normal state resistance (Rn) and critical current (Ic) for designing superconductor analogue devices or digital circuits. Determination of Rn and Ic from voltage-current (U-I) characteristic curves often faces difficulties; in particular Ic is considerably reduced by intrinsic thermal or extrinsic electrical noises. Here, we propose a standard measurement method of Rn and intrinsic critical current (Ici) for high-Tc superconductor (HTS) grain boundary JJs operated in liquid nitrogen and low-Tc superconductor (LTS) multilayer SNS JJs in liquid helium. The applicable condition of this method is that both HTS and LTS JJs have U-I curves compatible with resistively-shunted junction (RSJ) model. Both Rn and Ici values are extracted by combining a geometric mean criterion to select a data set and a least-squares fitting method with the RSJ model, eliminating two distortion effects on U-I curves: noise-rounding and self-heating. The combined method ensures relative standard uncertainty values of 1,9 % for Rn and 8 % for Ici or better, when the users follow the standard protocol. It is demonstrated that the combined method is valid for d-wave HTS JJs near 77K, regardless of peculiarities such as 0- junction transition in d-wave superconductors at lower temperatures, and s-wave LTS SNS JJs with a wide range of junction parameters. This work is the first step to facilitate standardization for superconductor electronics with JJs.

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Magnetic signal denoising based on auxiliary sensor array and deep noise reconstruction

Wang

Song

Liu

et al. 2023

Engineering Applications of Artificial Intelligence

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Development of Metallic Contaminant Inspection System Using High-Tc rf-SQUID for Li-ion Battery Liquid Components

Cited by 4 publications

References 7 publications

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

Standard measurement method for normal state resistance and critical current of resistively shunted Josephson junctions

Magnetic signal denoising based on auxiliary sensor array and deep noise reconstruction

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