US 12,434,323 B2
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. 17/921,270
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Jun. 25, 2021, PCT No. PCT/KR2021/008045
§ 371(c)(1), (2) Date Oct. 25, 2022,
PCT Pub. No. WO2022/019504, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 10-2020-0089914 (KR), filed on Jul. 20, 2020.
Prior Publication US 2023/0201953 A1, Jun. 29, 2023
Int. Cl. B23K 20/00 (2006.01); B23K 20/10 (2006.01); B23K 101/36 (2006.01)
CPC B23K 20/10 (2013.01) [B23K 20/002 (2013.01); B23K 2101/36 (2018.08)] 11 Claims
OG exemplary drawing
 
1. An ultrasonic welding device for a secondary battery, the ultrasonic welding device configured to weld an overlapping surface of an electrode tab and an electrode lead in an electrode assembly, the ultrasonic welding device comprising:
an anvil, wherein the overlapping surface of the electrode tab and the electrode lead is disposed on the anvil;
a horn configured to apply ultrasonic waves to the overlapping surface of the electrode tab and the electrode lead while pressing the overlapping surface;
an electrode tab measuring part configured to measure an entire thickness of the electrode tab disposed on the overlapping surface; and
a pressure adjusting device configured to adjust a pressure applied to the overlapping surface by the anvil and the horn according to a value of the thickness of the electrode tab measured by the electrode tab measuring part.