Lg Energy Solution, Ltd.

Il Hwan Park

Chang Bum Ahn

Jung Su Park

A horn includes a plurality of protrusion formation parts, each of which has a plurality of protrusions that protrude from a welding surface and are arranged in a line in at least one row, the plurality of protrusion formation parts respectively configured to form pattern formation parts on an outermost electrode tab of electrode tabs of a secondary battery, and a protrusion-free part which is disposed between two protrusion formation parts of the plurality of protrusion formation parts and in which protrusions are not provided to expose the welding surface to an outside, the protrusion-free part configured to form a pattern-free part on the outermost electrode tab. The protrusion-free part has a width greater than a width of each of the protrusions.

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Daejon, South Korea

Il Hwan Park