Quantifying Interface Thickness Variances in Pack Thermal Layers
Quantifying interface thickness variances across pack thermal layers prevents localized hot spots, cell degradation splits, and unallocated warranty exposure.
Laser Profilometry
Meaning
Optical metrology systems capture the three-dimensional geometry of surfaces by measuring the displacement of a returned beam. Applying laser profilometry allows for the rapid inspection of electrode coatings and battery casing dimensions. The system produces a detailed digital map of the height variations across the target area.
Surface Mapping
Triangulation sensors calculate the distance to the substrate by analyzing the position of the returned light on a detector. In battery manufacturing, laser profilometry detects defects such as pinholes, ridges, or uneven thickness in the active material coating. These measurements occur at high frequencies to match production speeds.
Signal Processing
Raw data from the sensor is converted into a point cloud that represents the physical surface. Because laser profilometry provides sub-micron resolution, it can identify subtle changes in the texture of a foil or film. Software filters out noise caused by vibrations in the factory environment.
Inspection Throughput
Automated systems use this technology to verify that every cell meets the tight geometric requirements for modular assembly. Using laser profilometry reduces the reliance on manual gauging which is slow and prone to error. Digital records of the surface profile support long term quality tracking.
The high capture rate of modern sensors allows for 100 percent inspection of parts on a moving conveyor belt, ensuring that any deviation from the nominal dimensions is flagged before the component moves to the next stage of the manufacturing process.