US 12,412,939 B2
Power supply device, and vehicle and power storage device each equipped with same
Takashi Yoshida, Hyogo (JP); Tisato Magara, Hyogo (JP); and Masato Koutari, Hyogo (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 17/905,829
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Nov. 19, 2020, PCT No. PCT/JP2020/043106
§ 371(c)(1), (2) Date Sep. 8, 2022,
PCT Pub. No. WO2021/199488, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2020-064058 (JP), filed on Mar. 31, 2020.
Prior Publication US 2023/0123492 A1, Apr. 20, 2023
Int. Cl. H01M 10/48 (2006.01); B60L 50/64 (2019.01); H01M 50/209 (2021.01); H01M 50/507 (2021.01); H01M 50/516 (2021.01); B60L 50/51 (2019.01); B60L 50/61 (2019.01)
CPC H01M 10/488 (2013.01) [B60L 50/64 (2019.02); H01M 50/209 (2021.01); H01M 50/507 (2021.01); H01M 50/516 (2021.01); B60L 50/51 (2019.02); B60L 50/61 (2019.02); H01M 2220/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A power supply device comprising:
a battery stack including a plurality of battery cells stacked, the plurality of battery cells including electrode terminals on upper surfaces of outer covering cans of the battery cells, each of the electrode terminals including uppermost surface; and
a plurality of bus bars each connecting a corresponding pair of the electrode terminals of adjacent battery cells among the plurality of battery cells,
wherein each of the plurality of bus bars is larger than the corresponding one of the electrode terminals of the plurality of battery cells thereby an outline of the corresponding electrode terminal is hidden by the bus bar and defines a window for visually recognizing not all but a part of the uppermost surface of the electrode terminals of at least one of the adjacent battery cells in a state where each of the plurality of bus bars is overlapped with the electrode terminals in plan view in order to detect the outline of the corresponding electrode terminal.