US 12,394,845 B2
Battery production method, battery production apparatus, and battery
Satoshi Nakashima, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Oct. 12, 2022, as Appl. No. 17/964,404.
Claims priority of application No. 2021-169422 (JP), filed on Oct. 15, 2021.
Prior Publication US 2023/0122892 A1, Apr. 20, 2023
Int. Cl. H01M 50/169 (2021.01); H01M 50/105 (2021.01); H01M 50/128 (2021.01)
CPC H01M 50/169 (2021.01) [H01M 50/105 (2021.01); H01M 50/128 (2021.01)] 6 Claims
OG exemplary drawing
 
1. A battery production method, comprising:
(a) accommodating an electrode assembly in a laminated casing;
(b) forming a pressure-applied portion by sandwiching at least a portion of a peripheral edge of the laminated casing between a first tool and a second tool; and
(c) forming a sealed portion by applying ultrasonic vibration from at least one of the first tool and the second tool to the pressure-applied portion, wherein
the first tool includes a projection portion,
the second tool is provided with a groove portion,
a bending tendency portion is formed in the laminated casing by sandwiching the laminated casing between a tip of the projection portion and a bottom portion of the groove portion, and
the laminated casing is welded on both sides across the bending tendency portion.