The welding quality of battery sealing nails critically impacts battery performance. Defects such as pinholes, cracks, burst points, pits, lifted nails, steps, discoloration, weld ash, incomplete welds, and slag may occur after welding, potentially causing loose casings, air leaks, or electrolyte leakage.
Ensuring weld integrity and casing sealing requires post-weld defect inspection. However, the uneven and complex weld bead profiles combined with the reflective nature of metal surfaces make defect detection particularly challenging.
