In Line Phased Array Inspection of Encapsulated Battery Structural Adhesives
Inline phased array testing maps structural adhesive wet-out and void formation through metal pack enclosures in real time at production line speeds.
B-Scan Imaging
Meaning
Two-dimensional plot provides the reference for depth measurements and internal layer thickness. As the beam traverses the part, b-scan imaging creates a visual slice that reveals the internal structure. This method is common in the evaluation of battery pouch cells to check for gas pockets or layer separation.
Depth Acquisition
Time-delayed echoes return from various interfaces to build the vertical axis of the image. As the transducer moves across the surface, b-scan imaging maps these reflections to specific horizontal positions. The resulting plot shows a slice through the material.
Signal Visualization
Variations in brightness or color represent the strength of the returning sound waves. A clear boundary appears as a continuous line, while an internal void creates a distinct interruption. Technical experts use these patterns to distinguish between harmless surface noise and deep-seated structural flaws.
Structural Analysis
Measuring the thickness of individual components becomes possible when the velocity of the material is known. In battery manufacturing, b-scan imaging helps verify the compression of the electrode stack after the electrolyte filling process. It also works to locate precise depths of inclusions or delaminations that would be invisible in a top-down view.
This depth information allows engineers to assess whether a defect resides in a critical area or a secondary support structure. Accurate mapping reduces the likelihood of false positives during the quality assurance phase.