US 11,923,555 B2
Battery pack
Hidemi Kurihara, Osaka (JP); and Takao Takatsu, Hyogo (JP)
Assigned to PANASONIC ENERGY CO., LTD., Osaka (JP)
Appl. No. 17/048,172
Filed by SANYO Electric Co., Ltd., Osaka (JP)
PCT Filed Apr. 10, 2019, PCT No. PCT/JP2019/015580
§ 371(c)(1), (2) Date Oct. 16, 2020,
PCT Pub. No. WO2019/208217, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 2018-084553 (JP), filed on Apr. 25, 2018.
Prior Publication US 2021/0167456 A1, Jun. 3, 2021
Int. Cl. H01M 50/231 (2021.01); H01M 10/613 (2014.01); H01M 10/623 (2014.01); H01M 10/643 (2014.01); H01M 10/653 (2014.01); H01M 10/6555 (2014.01); H01M 10/658 (2014.01); H01M 50/213 (2021.01); H01M 50/222 (2021.01); H01M 50/227 (2021.01); H01M 50/247 (2021.01); H01M 50/293 (2021.01)
CPC H01M 50/231 (2021.01) [H01M 10/613 (2015.04); H01M 10/623 (2015.04); H01M 10/643 (2015.04); H01M 10/653 (2015.04); H01M 10/6555 (2015.04); H01M 10/658 (2015.04); H01M 50/213 (2021.01); H01M 50/222 (2021.01); H01M 50/227 (2021.01); H01M 50/247 (2021.01); H01M 50/293 (2021.01); H01M 2220/30 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A battery pack comprising:
a plurality of battery cells; and
a holder holding the plurality of battery cells to be arranged in a parallel posture, wherein the holder includes a partition wall between adjacent two of the plurality of battery cells to arrange the plurality of battery cells at fixed positions,
the partition wall has a three-layer structure including:
resin molded layers each having a surface facing a corresponding battery cell of the each adjacent two of the plurality of battery cells, and each surface being shaped to arrange the corresponding battery cell at a fixed position thereof, and
a thermally insulating plate is disposed inside and being sandwiched by the resin molded layers,
the holder further includes a synthetic resin molding the resin molded layers to be integrated into a single piece, and
the resin molded layers are configured to melt at an elevated temperature lower than a melting point of the thermally insulating plate, wherein
the holder includes an inflow space into which an adjacent resin molded layer of the resin molded layers is configured to flow when the adjacent resin molded layer is melted upon reaching the elevated temperature.