US 12,132,219 B2
Power supply device, electric vehicle and power storage device including power supply device, and method of manufacturing power supply device
Go Yamashiro, Hyogo (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 17/439,856
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Dec. 20, 2019, PCT No. PCT/JP2019/050064
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2020/202663, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-066826 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0190431 A1, Jun. 16, 2022
Int. Cl. H01M 50/264 (2021.01); B60K 1/04 (2019.01); B60L 53/60 (2019.01); H01M 10/44 (2006.01); H01M 50/209 (2021.01); H01M 50/224 (2021.01); H01M 50/249 (2021.01); H01M 50/262 (2021.01)
CPC H01M 50/264 (2021.01) [B60K 1/04 (2013.01); B60L 53/60 (2019.02); H01M 10/44 (2013.01); H01M 50/209 (2021.01); H01M 50/224 (2021.01); H01M 50/249 (2021.01); H01M 50/262 (2021.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power supply device comprising:
a battery stack body including a plurality of secondary battery cells each including a prismatic exterior can are stacked;
a pair of end plates covering both end surfaces of the battery stack body, the both ends surfaces being ends along stacking of the battery stack body; and
a plurality of fastening members each disposed on a corresponding one of side surfaces of the battery stack body to fasten the end plates to each other, the side surfaces facing each other, wherein
each of the plurality of fastening members includes
a plate-shaped bar being elongated along a stacking of the plurality of secondary battery cells, and
locking blocks fixed to both ends of the plate-shaped bar, the both ends being ends along a length of the plate-shaped bar,
each of the locking blocks is thicker than the plate-shaped bar, is joined to an end surface of the plate-shaped bar, and protrudes toward an outer peripheral surface of a corresponding one of the end plates relative to an inner surface of the plate-shaped bar,
each of the end plates includes:
a fitting portion on an outer peripheral surface of the end plate, the fitting portion guides a corresponding one of the locking blocks, and
a stopper portion that abuts on the corresponding one of the locking blocks on a part close to the battery stack body of the fitting portion,
each of the locking blocks is locked to the stopper portion of a corresponding one of the plurality of fastening members to fasten a corresponding one of the end plates with the corresponding one of the plurality of fastening members, and
a joint part between each of the locking blocks and the plate-shaped bar is disposed in a same plane on an outer surface of a corresponding one of the plurality of fastening members.