US 12,266,773 B2
Partition member and battery assembly
Kei Ishihara, Hikone (JP)
Assigned to MITSUBISHI CHEMICAL CORPORATION, Tokyo (JP)
Filed by MITSUBISHI CHEMICAL CORPORATION, Tokyo (JP)
Filed on Sep. 28, 2021, as Appl. No. 17/487,051.
Application 17/487,051 is a continuation of application No. PCT/JP2020/013897, filed on Mar. 27, 2020.
Claims priority of application No. 2019-062041 (JP), filed on Mar. 28, 2019; and application No. 2019-062042 (JP), filed on Mar. 28, 2019.
Prior Publication US 2022/0013826 A1, Jan. 13, 2022
Int. Cl. H01M 10/613 (2014.01); H01M 10/625 (2014.01); H01M 10/651 (2014.01); H01M 10/658 (2014.01); H01M 50/231 (2021.01); H01M 50/293 (2021.01)
CPC H01M 10/613 (2015.04) [H01M 10/625 (2015.04); H01M 10/651 (2015.04); H01M 10/658 (2015.04); H01M 50/231 (2021.01); H01M 50/293 (2021.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A partition member, comprising:
a liquid;
a thermal insulating material capable of retaining the liquid; and
an external package housing the thermal insulating material and the liquid,
wherein the partition member has a thickness direction and a plane direction perpendicular to the thickness direction, and satisfies expression 1 and expression 2:
0.25≤V1/(S1×D1)≤0.70  expression 1:
0.35≤S2/S1  expression 2:
wherein:
S1 is an area of an internal space of the external package in a plane perpendicular to the thickness direction;
S2 is an area of the thermal insulating material in the plane perpendicular to the thickness direction;
D1 is a thickness of the thermal insulating material in the thickness direction; and
V1 is a volume of the liquid, and
wherein the partition member partitions single cells, or a single cell and a member other than a single cell, in the thickness direction.