US 12,337,411 B2
Ultrasonic welding method using biasing members
Kota Ohata, Toyota (JP); and Koshiro Yoneda, Ichinomiya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP); and TOYOTA BATTERY CO., LTD., Kosai (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP); and PRIMEARTH EV ENERGY CO., LTD., Kosai (JP)
Filed on Jan. 30, 2023, as Appl. No. 18/103,076.
Claims priority of application No. 2022-015358 (JP), filed on Feb. 3, 2022.
Prior Publication US 2023/0241709 A1, Aug. 3, 2023
Int. Cl. B23K 20/26 (2006.01); B23K 20/10 (2006.01); B23K 37/04 (2006.01); B23K 101/36 (2006.01); B23K 103/18 (2006.01); B29C 65/08 (2006.01)
CPC B23K 20/26 (2013.01) [B23K 20/10 (2013.01); B23K 37/0435 (2013.01); B06B 2201/72 (2013.01); B23K 2101/36 (2018.08); B23K 2103/18 (2018.08); B29C 65/08 (2013.01)] 7 Claims
OG exemplary drawing
 
1. An ultrasonic welding method comprising welding a bus bar to an external terminal of a power storage cell by applying ultrasonic vibration to the external terminal and the bus bar, wherein
in the welding, the external terminal is sandwiched by a first holding member and a second holding member from opposite sides in a vibration direction of the ultrasonic vibration applied to the external terminal and the bus bar, the first holding member biased toward the external terminal in a first direction by a first biasing member, and the second holding member biased toward the external terminal in a second direction opposite the first direction by a second biasing member,
in the welding, the first biasing member and the second biasing member bias the first holding member and the second holding member toward the external terminal such that the external terminal and the bus bar are vibrated at an amplitude smaller than an amplitude of the ultrasonic vibration,
in the welding, the first biasing member and the second biasing member bias the first holding member and the second holding member toward the external terminal such that the external terminal and the bus bar are vibrated with a contact surface pressure that is 10 N/mm 2 or more applied from the first holding member and the second holding member to the external terminal and with an amplitude of 60% or less of the amplitude of the ultrasonic vibration.