US 12,420,362 B2
Secondary battery and ultrasonic welding device and welding method for secondary battery
Sang Ho Bae, Daejeon (KR); Hun Bum Jung, Daejeon (KR); Jin Yong Lee, Daejeon (KR); Ji Hun Hwang, Daejeon (KR); Cha Hun Ku, Daejeon (KR); Su Taek Jung, Daejeon (KR); Chang Min Han, Daejeon (KR); Jae Hwa Choi, Daejeon (KR); Young Seok Baek, Daejeon (KR); Jeong Yeon Kim, Daejeon (KR); and Jung Joo Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/921,287
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Jun. 25, 2021, PCT No. PCT/KR2021/008042
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2022/014895, PCT Pub. Date Jan. 20, 2022.
Claims priority of application No. 10-2020-0089211 (KR), filed on Jul. 17, 2020; and application No. 10-2021-0081002 (KR), filed on Jun. 22, 2021.
Prior Publication US 2023/0182239 A1, Jun. 15, 2023
Int. Cl. H01M 50/528 (2021.01); B23K 20/10 (2006.01); B23K 37/04 (2006.01); B23K 101/38 (2006.01)
CPC B23K 37/0452 (2013.01) [B23K 20/106 (2013.01); H01M 50/528 (2021.01); B23K 2101/38 (2018.08)] 7 Claims
OG exemplary drawing
 
1. An ultrasonic welding device comprising:
an anvil provided so that an overlapping surface of an electrode tab and an electrode lead, which are provided in an electrode assembly, are configured to be disposed thereon;
a horn configured to weld the overlapping surface disposed on the anvil; and
an inspection member configured to inspect a horizontal level of an opposing member with respect to the overlapping surface, based on an overlapping surface horizontal value that is a horizontal value of the overlapping surface with respect to a predetermined reference surface and an opposing horizontal value that is a horizontal value of the opposing member, which is one of a welding part of the horn configured to face the overlapping surface and a disposing part of the anvil, on which the overlapping surface is configured to be disposed, with respect to the predetermined reference surface.