Nondestructive battery test by ultrasound

Published on 29/02/2024

Ultrasound testing method is nondestructive characterization method for obtaining information about the state of a battery in a fast and non-expensive way. Among the applications of ultrasound are electrolyte wetting, gas formation, Li plating etc.

UBSC-LD50 : Ultrasonic Scanning System

UBSC-DTBT: Desktop ultrasonic scanning system

Main text:

Gas formation, lithium plating, bad electrolyte wetting are important issues to target for safer and more reliable lithium-ion batteries. The nondestructive analyzing techniques are the pivotal tools to estimate the state of an already prepared battery. One of such analyzing techniques is ultrasound testing.

Ultrasonic waves have different propagation speed in different mediums. These differences in propagation speed make it possible to use ultrasound as a non-destructive technique for battery characterization. High frequency ultrasound, focused scanning coupled up with AI tools could help analyze battery conditions.

The applications of the ultrasound testing:

Electrolyte wetting

2. Early-stage gassing or leak detection

3. SOC monitoring

4. Lithium plating

SPECIFICATIONS UBSC-LD50

Features	Bubble detection in the pouch/prismatic cells Electrolyte distribution during the vacuum standing Pouch/Prismatic cell leak detection Lithium plating detection Lithium-ion distribution Analysis Cycle life prediction
Voltage & Power	AC 208 – 240V, Three phase, 50/60Hz 13.5 kW
Applicable Cell-type	Pouch cells Prismatic cells Pouch cell fixture
Coupling Medium	Liquid Silicone Oil recommended
Scanning	Ultrasonic C Scanning Transmission + Reflection Maximum Scanning Area: 600 mm L x 300 mm W Maximum Scanning Thickness: 70 mm Resolution: 0.5 mm – 30 mm; it depends on the cell thickness Scanning speed: ~ 1 – 10 minutes per cell; depends on the cell size
Testing Working Temperature	RT – 80 °C，± 0.5 °C
Ultrasonic Transducers	Power < 100 mW 2 pairs of transducer and transmittor: 2.0 MHz and 250 kHz
Scanning Stage	XY Axis translational stage Ultrasonic Power Source Signal Sampling System Battery Analyzer Temperature Controlled Oil Bath Tank Thermometer for calibration
Software	XY Axis Motion Control; XY Travel Pattern Ultrasonic parameters setting Transmission and Reflection Waves Displaying Scanning Image

SPECIFICATIONS UBSC-DTBT

Feature	Deterioration detection time：10-50 cycles Principle： Ultrasonic Characterization Way: In-situ Imaging Positioning： “B-ultrasonography” can check the position, shape, and size of battery defects. Prediction： The battery runaway trend can be judged when there are microscopic changes inside the battery.
Voltage & Power	AC 220-300 V, Single Phase, ≈100W
Scanning Accuracy	Silicone Oil Coupling ≤0.5mm Air Coupling≤1.5mm
Repeated Emission Frequency	2KHZ
Pulse Width	800ns
Damping	50Ω
Gain	0～110dB /0.1dB
Fitering	Broadband：0.1～1MHz、1～2MHz、2～5MHz Narrowband：0.5MHz、2MHz、5MHz
Scanning Speed	MAX 150mm/s
Scanning Range	MAX 218* * 47 * 30mm (Length * Width * THK)
Temperature Control	Room Temperature
Sampling Rate	80M/s 10bit
Interface	High and Low-temperature cycle 485 interface, ultrasonic host type-c interface
Storage	1TB
Testing Type	Pouch Cell / Hard Cell
Coupling Condition	Silicone oil or Air Coupling
Software	Laptop computer and software are included XY Axis Motion Control; XY Travel Pattern Ultrasonic parameters setting Transmission and Reflection Waves Displaying Scanning Image

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Nondestructive battery test by ultrasound

Ultrasound testing method is nondestructive characterization method for obtaining information about the state of a battery in a fast and non-expensive way. Among the applications of ultrasound are electrolyte wetting, gas formation, Li plating etc.

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