US 12,424,698 B2
Power supply device, electric vehicle comprising power supply device, and power storage device
Nao Kogami, Hyogo (JP); Kazuhiro Harazuka, Hyogo (JP); and Koji Fujinaga, Hyogo (JP)
Assigned to SANYO Electric Co., Ltd., Osaka (JP)
Appl. No. 17/906,623
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Dec. 28, 2020, PCT No. PCT/JP2020/049215
§ 371(c)(1), (2) Date Sep. 18, 2022,
PCT Pub. No. WO2021/199545, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2020-063976 (JP), filed on Mar. 31, 2020.
Prior Publication US 2023/0163402 A1, May 25, 2023
Int. Cl. H01M 50/291 (2021.01); B60K 1/04 (2019.01); B60L 50/64 (2019.01); H01M 50/209 (2021.01); H01M 50/242 (2021.01); H01M 50/264 (2021.01); H01M 50/293 (2021.01)
CPC H01M 50/293 (2021.01) [B60K 1/04 (2013.01); B60L 50/64 (2019.02); H01M 50/209 (2021.01); H01M 50/242 (2021.01); H01M 50/264 (2021.01); H01M 50/291 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A power supply device comprising:
a battery block including a plurality of battery cells in a thickness with a separator interposed between the plurality of battery cells, the plurality of battery cells stacked;
a pair of end plates disposed on both end surfaces of the battery block; and
a binding bar that is coupled to the pair of end plates and fixes the battery block in a pressurized state via the end plates,
wherein
the separator is an elastomer, having a first uneven layer and a second uneven layer opposite to the first uneven layer, the first uneven layer and the second uneven layer including different amounts of change in thickness with respect to a pressing force of the plurality of battery cells,
each of the first uneven layer and the second uneven layer includes a plurality of protrusions,
the protrusions are ridges, ridges being elongated,
a plurality of rows of the ridges are provided on the surfaces of the plate-shaped part,
the plurality of rows of ridges include parallel ridges arranged in parallel with each other, and
the first and second uneven layers alternately arranged a plurality of rows of the parallel ridges and a plurality of rows of parallel grooves,
in the first uneven layer of the plate-shaped part, the parallel ridges each including a rectangular cross-sectional shape are provided,
in the second uneven layer of the plate-shaped part, the parallel ridges each including a lateral width gradually narrowed toward a battery cell connection surface are provided, and
on both the surfaces of the plate-shaped part, the first and second uneven layers including different amounts of change in thickness with respect to a pressing force are provided.
 
7. An electric vehicle including the power supply device according to claim 1, the electric vehicle comprising:
the power supply device;
a motor for traveling to which electric power is supplied from the power supply device;
a vehicle body on which the power supply device and the motor are mounted; and
wheels driven by the motor to cause the vehicle body to travel.
 
8. A power storage device including the power supply device according to claim 1, the power storage device comprising:
the power supply device; and
a power supply controller that controls charging and discharging to the power supply device,
wherein the power supply controller enables charging to the secondary battery cell by electric power from an outside, and performs control to charge the secondary battery cell.