(Marposs: Auburn Hills, MI) -- Marposs, a global leader in measurement, inspection, and test technologies, has announced a solution for checking the welding joint of pouch cell batteries within the production process. Comprising interferometric sensors and an NCG (noncontact gauge) controller, the system works by splitting light into two beams that travel different optical paths and are then combined to produce interference, which can identify refractive changes and surface irregularities.

Pouch cell batteries are typically sealed using impulse or contact welding (heat sealing), which fuses the plastic layers together. The thickness of this joint is a key indicator of the quality of the seal and must be measured while the material is still soft. Marposs is able to check this thickness right after the welding process using its noncontact, interferometric technology.

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