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Laser Tab Cu 50 - 300 µm

21700 & Cu bus bars

Battery Cylindrical

21700 Single and Dual sided

Dual sided bus bar designs actually require higher precision, given the cell can base thickness and direct proximity of the cell chemistry.

Cross section analysis

Cross sections are laborious but still the most established method for detailed weld examination. F&K also utilises SAM Scanning acoustic microscopy, EDX Energy-dispersive X-ray spectroscopy.

Destructive pull tests

Pull tests are used to asses the welds strength. “Buttoning out” refers to the welded material remain after the TAB material itself fails first.