US 12,334,595 B2
Battery pack and battery pack manufacturing method
Nobuyuki Yamazaki, Okazaki (JP); Yoshinori Shibata, Nagoya (JP); and Seiichi Sakuramoto, Kobe (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and Prime Planet Energy & Solutions, Inc., Tokyo (JP)
Filed on Apr. 25, 2022, as Appl. No. 17/728,390.
Claims priority of application No. 2021-075379 (JP), filed on Apr. 27, 2021.
Prior Publication US 2022/0344782 A1, Oct. 27, 2022
Int. Cl. H01M 50/516 (2021.01); H01M 50/209 (2021.01); H01M 50/502 (2021.01); H01M 50/528 (2021.01)
CPC H01M 50/516 (2021.01) [H01M 50/209 (2021.01); H01M 50/502 (2021.01); H01M 50/528 (2021.01)] 5 Claims
OG exemplary drawing
 
1. A battery pack manufacturing method, comprising:
stacking battery cells;
pressurizing a battery cell group provided by stacking the battery cells in a stacking direction;
measuring positions of cell terminals of the battery cells included in the pressurized battery cell group;
finding a center straight line passing through a center of a distribution of the positions of the cell terminals;
positioning a welding jig configured to decide a position where a bus bar is pressed against at least one of the cell terminals with reference to the center straight line; and
welding the bus bar that is pressed against the at least one of the cell terminals, to the at least one of the cell terminals by the welding jig.