US 12,224,450 B2
Power supply device, and electric vehicle and power storage device that comprise said power supply device
Nao Kogami, Hyogo (JP); and Hiroyuki Takahashi, Hyogo (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 17/619,437
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Jun. 15, 2020, PCT No. PCT/JP2020/023443
§ 371(c)(1), (2) Date Dec. 15, 2021,
PCT Pub. No. WO2020/262079, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2019-122219 (JP), filed on Jun. 28, 2019.
Prior Publication US 2022/0384891 A1, Dec. 1, 2022
Int. Cl. H01M 50/242 (2021.01); H01M 10/625 (2014.01); H01M 10/658 (2014.01); H01M 50/249 (2021.01); H01M 50/264 (2021.01); H01M 50/293 (2021.01); H01M 50/489 (2021.01)
CPC H01M 50/242 (2021.01) [H01M 10/625 (2015.04); H01M 10/658 (2015.04); H01M 50/249 (2021.01); H01M 50/264 (2021.01); H01M 50/293 (2021.01); H01M 50/489 (2021.01); H01M 2220/20 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A power supply device comprising:
a battery block including a plurality of battery cells stacked in a thickness with a separator clamped between each adjacent pair of the plurality of battery cells;
a pair of end plates disposed on opposing end faces of the battery block; and
a binding bar coupled to the pair of end plates to fix the battery block in a compressed state via the end plates,
wherein the separator includes a three-layer structure including (i) an elastic sheet that is viscoelastic and absorbs expansion of the adjacent pair of the plurality of battery cells, and (ii) (iii) heat-insulating sheets laminated on opposing surfaces of the elastic sheet,
each of the heat-insulating sheets includes a hybrid material of an inorganic powder and a fibrous reinforcing material, and
wherein each of the plurality of battery cells includes a battery case whose upper end opening is closed with a sealing plate, and
the separator includes the elastic sheet disposed in a body region, the body region not including a sealing part region clamped at an upper end of the battery case between the adjacent pair of the plurality of battery cells.