US 12,327,877 B2
Battery module
Yuta Sugiyama, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on May 25, 2022, as Appl. No. 17/824,275.
Claims priority of application No. 2021-095093 (JP), filed on Jun. 7, 2021.
Prior Publication US 2022/0393297 A1, Dec. 8, 2022
Int. Cl. H01M 50/293 (2021.01); H01M 10/651 (2014.01); H01M 10/6555 (2014.01); H01M 50/48 (2021.01); H01M 50/489 (2021.01); H01M 10/647 (2014.01); H01M 10/653 (2014.01); H01M 10/6557 (2014.01); H01M 10/658 (2014.01)
CPC H01M 50/293 (2021.01) [H01M 10/651 (2015.04); H01M 10/6555 (2015.04); H01M 50/48 (2021.01); H01M 50/489 (2021.01); H01M 10/647 (2015.04); H01M 10/653 (2015.04); H01M 10/6557 (2015.04); H01M 10/658 (2015.04); Y02E 60/10 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A battery module comprising:
a plurality of battery cells arranged along a thickness direction;
an elastic member between neighboring battery cells of the plurality of battery cells; and
a thermally expandable resin composition body arranged in a groove or a penetrated part of the elastic member; wherein:
in a plan view along the thickness direction, the resin composition body is arranged to include a center of the neighboring battery cells;
a temperature at which the resin composition body starts to expand is 80° C. or more;
heat conductivity after expansion of the resin composition body is 0.5 W/m·K or less; and
in the plan view along the thickness direction, the elastic member is in a rectangular shape, and when a direction parallel to a longer side of the elastic member is regarded as a first direction, a direction orthogonal to the first direction is regarded as a second direction, X1 designates a length of the elastic member in the first direction, X2 designates a length of the resin composition body in the first direction, Y1 designates a length of the elastic member in the second direction, and Y2 designates a length of the resin composition body in the second direction, each of a ratio of the X2 with respect to the X1, which is X2/X1, and a ratio of the Y2 with respect to the Y1, which is Y2/Y1, is 25% or more and 50% or less.