US 12,257,646 B2
Horn and welding device
Jung Su Park, Daejeon (KR); Chang Bum Ahn, Daejeon (KR); and Il Hwan Park, Daejon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/423,293
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Oct. 1, 2019, PCT No. PCT/KR2019/012818
§ 371(c)(1), (2) Date Jul. 15, 2021,
PCT Pub. No. WO2020/153570, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 10-2019-0007599 (KR), filed on Jan. 21, 2019.
Prior Publication US 2022/0088708 A1, Mar. 24, 2022
Int. Cl. B23K 26/21 (2014.01); B23K 20/00 (2006.01); B23K 20/10 (2006.01); B23K 101/38 (2006.01); H01M 50/533 (2021.01); H01M 50/536 (2021.01)
CPC B23K 26/21 (2015.10) [B23K 20/002 (2013.01); B23K 20/106 (2013.01); H01M 50/533 (2021.01); H01M 50/536 (2021.01); B23K 2101/38 (2018.08)] 15 Claims
OG exemplary drawing
 
1. A horn comprising:
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,
wherein the protrusion-free part has a width greater than a width of each of the protrusions.