has developed systems for non-destructive reliable and reproducible inspections of battery pouches. Our imaging ultrasonic inspection technique can be used in the laboratory,
Here, we present a contactless ultrasound spectroscopy technique based on the use of air-coupled transducers of high sensitivity and wide frequency band to detect state-of-charge (SOC)-related changes in LIB cells in operando. Additionally, its ability to detect mechanical integrity alterations was also revealed, showing the potential of
At IEEE-IUS 2023, Montreal we presented our results obtained testing Li-ion pouch cells using wideband, air-coupled ultrasound and spectral analysis in the frequency range 0.1-1.5 MHz. Results show that i) it is possible to generate and sense thickness resonances, ii) these resonances are sensitive to the state of charge and
为了克服传统方法通过充放电电压曲线来测量锂离子电池充电状态的不足,提出了一种基于空气耦合超声的方法,可以延缓电池的老化。 使用Biot的流体饱和多孔介质模型分析
monolayer microporous membrane separators for lithium-ion batteries by using an ultrasonic non-destructive test that can be compatible with the manufacturing process. Therefore, an air
Based on Biot''s theory of fluid-saturated porous media, this paper uses air-coupled ultrasound to detect the ultrasonic propagation behavior of a lithium battery during charging, as well as the electrical quantity, obtaining
With the advent of lithium-ion batteries (LIBs) and electric vehicle (EV) technology, the research on the battery State-of-Charge (SoC) estimation has begun to rise and develop rapidly.
Air-coupled ultrasonic testing of carbon/carbon composite aircraft brake disks. Mater. Eval., 71 (2013), pp. 987-994. View in Scopus Google Scholar. Sanabria et al., 2015. S.J. Sanabria, R. Furrer, J. Neuenschwander, P. Niemz, P. Schütz. Analytical modeling, finite-difference simulation and experimental validation of air-coupled ultrasound beam refraction
This work describes the use of an air-coupled and through transmission ultrasonic (0.2–1.5 MHz) technique, both at normal and oblique incidence, for the characterization and test of pouch-cell Li-ion (and similar types) batteries and components. Time domain measurements show that it is possible to measure ultrasonic velocity in the battery
Based on Biot''s theory of fluid-saturated porous media, this paper uses air-coupled ultrasound to detect the ultrasonic propagation behavior of a lithium battery during charging, as well as the electrical quantity, obtaining fast
monolayer microporous membrane separators for lithium-ion batteries by using an ultrasonic non-destructive test that can be compatible with the manufacturing process. Therefore, an air-coupled ultrasonic technique is selected. In addition, in order to
This work describes the use of an air-coupled and through transmission ultrasonic (0.2–1.5 MHz) technique, both at normal and oblique incidence, for the characterization and test of pouch-cell Li-ion (and similar types) batteries and components. Time domain measurements show that it is possible to measure ultrasonic velocity in the
This paper studies and demonstrates the application of air-coupled ultrasonic testing technology to nondestructive testing of the stomata defect in a lithium-ion battery. Firstly, based on the characteristics of the periodic stacking structure of a lithium-ion battery core and the corresponding relationship between the air-coupled
This paper studies and demonstrates the application of air-coupled ultrasonic testing technology to nondestructive testing of the stomata defect in a lithium-ion battery. Firstly, based on the characteristics of the
Different ultrasonic testing setups are explored to determine the optimal testing parameters for the battery. An ultrasonic monitoring system is developed to monitor the battery during charge/discharge at 750 kHz, 1 MHz, and 1.5 MHz. Signal processing algorithms are proposed for extracting three ultrasonic features—amplitude, wave velocity
These preliminary results indicate that the proposed air-coupled ultrasonic NDT method with leaky Lamb waves can be used to inspect the sealing integrity of Li-ion pouch batteries in dry test
Air-Coupled Ultrasonic Testing. During the last decade, air coupled ultrasonic testing has advanced from being a laboratory curiosity, of little practical application, to a point where it is a viable technique for many manufacturing inspections. With appropriate equipment, it is possible to perform sensitive inspections for defects such as voids, cracks and dis-bonds in a wide variety
Air-coupled ultrasonic testing systems are usually restricted by low signal-to-noise ratios (SNR). The use of pulse compression techniques based on P4 Polyphase codes can improve the ultrasound
At IEEE-IUS 2023, Montreal we presented our results obtained testing Li-ion pouch cells using wideband, air-coupled ultrasound and spectral analysis in the frequency range 0.1-1.5 MHz. Results show that i) it is possible
This paper presents a new air-coupled ultrasonic non-destructive testing (NDT) inspection method based on leaky Lamb wave transmission; and reception for evaluating the sealing integrity between the lead tab and the Al
Lamb-wave-based air-coupled ultrasonic testing, combined with DI and ultrasonic imaging algorithm, could be a potential way in the NDT of lightweighted structures. View. Show abstract. Laser
In contrast to conventional ultrasonic testing, no liquid coupling and no direct contact with the test object is required. Air-coupled ultrasonic testing (ACUT) is a well established procedure in the aerospace industry since its first introduction in the 1970s. However, the possibilities of the technology at that time were very limited (defect resolution, sensitivity, software post
Here, we present a contactless ultrasound spectroscopy technique based on the use of air-coupled transducers of high sensitivity and wide frequency band to detect state-of-charge
To this end, a cell (LP01) was measured with the air-coupled ultrasonic technique at constant SOC at room temperature before being heated in the oven to 55°C. It was then let cool to room temperature while its coefficient spectra were measured. Figure 5 A shows the evolution of the first and second resonance peaks during this experiment.
This paper presents a new air-coupled ultrasonic non-destructive testing (NDT) inspection method based on leaky Lamb wave transmission; and reception for evaluating the sealing integrity between the lead tab and the Al pouch film. The proposed method uses the critical incidence angle between the air and the layer with the fastest
has developed systems for non-destructive reliable and reproducible inspections of battery pouches. Our imaging ultrasonic inspection technique can be used in the laboratory, integrated into production lines or even be used mobile. Different module sizes and
为了克服传统方法通过充放电电压曲线来测量锂离子电池充电状态的不足,提出了一种基于空气耦合超声的方法,可以延缓电池的老化。 使用Biot的流体饱和多孔介质模型分析了超声波在电池中的传播特性；充电时通过监测超声波对信号进行实时监测,得到快波和慢波信号。 首先分析了时域信号的快速幅值,建立了幅值与锂离子电池荷电状态的近似线性关系。 然后进
The objective of this study is to compare the performance of different ultrasonic non-destructive testing (NDT) techniques for bonding quality evaluation. Aluminium-epoxy-aluminium single lap joints containing debonding in the form of release film inclusions have been investigated using three types of ultrasonic NDT methods: contact testing, immersion testing, and air-coupled
Different ultrasonic testing setups are explored to determine the optimal testing parameters for the battery. An ultrasonic monitoring system is developed to monitor the battery
Based on Biot’s theory of fluid-saturated porous media, this paper uses air-coupled ultrasound to detect the ultrasonic propagation behavior of a lithium battery during charging, as well as the electrical quantity, obtaining fast-wave and slow-wave time-domain signals.
The C-scan result verified that air-coupled ultrasonic testing technology can accurately and effectively detect the pre-embedded stomata defect and natural stomata defect in a lithium-ion battery, which is able to promote and expand the application of the technology in the field of electric energy security. 1. Introduction
Under air-coupled conditions, an ultrasonic wave is excited, propagated and received through a variety of media and fluid–solid coupling interfaces, particularly in air-coupled ultrasonic testing of a lithium-ion battery.
The ultrasonic inspection technique can also detect defection for Li-ion batteries. Li and Zhou utilized air-coupled ultrasonic wave for stomata defect detection, and Robinson et al. identified the designed missing half of the negative-electrode layer with the ultrasonic signal amplitude.
Ultrasonic testing is one of the most widely used techniques for nondestructive evaluation of material properties and structural health monitoring. The stress wave excited by the ultrasonic transmitter propagates in the material and is received by the ultrasonic receiver.
Analysis is conducted on the propagation characteristics of ultrasound in the battery using Biot’s fluid-saturated porous media model; the signal is monitored in real time by monitoring ultrasonic waves during charging, and fast-wave and slow-wave signals are obtained.
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