US 11,837,742 B2
Partition member and assembled battery
Tatsuhiko Honda, Tokyo (JP); and Naoto Maru, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Sep. 24, 2020, as Appl. No. 17/030,440.
Application 17/030,440 is a continuation of application No. PCT/JP2019/014237, filed on Mar. 29, 2019.
Claims priority of application No. 2018-070009 (JP), filed on Mar. 30, 2018.
Prior Publication US 2021/0013471 A1, Jan. 14, 2021
Int. Cl. H01M 50/24 (2021.01); H01M 10/647 (2014.01); H01M 10/658 (2014.01); H01M 10/613 (2014.01); H01M 10/6555 (2014.01); H01M 50/105 (2021.01); H01M 50/211 (2021.01); H01M 50/242 (2021.01); H01M 50/291 (2021.01); H01M 50/293 (2021.01); H01M 10/052 (2010.01); H01M 50/204 (2021.01)
CPC H01M 50/24 (2021.01) [H01M 10/647 (2015.04); H01M 10/658 (2015.04); H01M 50/204 (2021.01); H01M 50/291 (2021.01); H01M 50/293 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A partition member which has a thickness direction and a planar direction orthogonal to the thickness direction and which constitutes a partition between single batteries in the thickness direction or between a single battery and a member other than the single battery, the partition member comprising:
a thermal insulation material; and
an auxiliary member which is disposed so as to be adjacent to the thermal insulation material in the planar direction and regulates a degree of contraction of the thermal insulation material in the thickness direction,
wherein a ratio of a density of the auxiliary member relative to a density of the thermal insulation material is 0.50 to 6.0, and
wherein the partition member further comprises an exterior body configured to encapsulate the thermal insulation material, the auxiliary member being disposed out of the exterior body.