WELDING INSPECTION APPARATUS

A welding inspection apparatus and a welding inspection method in which in a tab-less cylindrical battery cell having a jelly roll-type electrode assembly, a current collection plate welded to an uncoated part of the electrode assembly is welded to an electrode terminal that is fixed in a way that penetrates a closed surface provided in one end portion of a cylindrical battery can which accommodates the electrode assembly, from the inside of a hollow hole part of the electrode assembly, to see a welding state. The battery can is fixed by a jig, and the welding inspection apparatus, as a vision camera inspection apparatus with an endoscope part or a telephoto lens, photographs a welding portion and the inner surface of the hollow hole part, to see failure caused by weak welding, over welding or weld spatter.