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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.

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:

  1. Electrolyte wetting




2. Early-stage gassing or leak detection




3. SOC monitoring




4. Lithium plating





  • 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


  • 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


  • XY Axis Motion Control; XY Travel Pattern
  • Ultrasonic parameters setting
  • Transmission and Reflection Waves Displaying
  • Scanning Image





  • 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

  • 2KHZ

Pulse Width

  • 800ns


  • 50Ω


  • 0~110dB /0.1dB


  • 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


  • High and Low-temperature cycle 485 interface, ultrasonic host type-c interface


  • 1TB

Testing Type

  • Pouch Cell / Hard Cell

Coupling Condition

  • Silicone oil or Air Coupling


  • 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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