| CPC H01M 50/30 (2021.01) [H01M 50/24 (2021.01); H01M 50/383 (2021.01); H01M 2220/20 (2013.01)] | 8 Claims |
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1. A battery module comprising:
a cell assembly comprising at least two battery cells;
a module housing comprising an inner space accommodating the cell assembly, and comprising a circulation hole so that the inner space is connected to an outside;
a mesh member having a mesh structure and provided in the circulation hole of the module housing;
a sealing layer facing the mesh member and configured to expand a volume at a temperature higher than a predetermined temperature to seal a mesh hole of the mesh member; and
a discharge member provided outside the sealing layer, spaced apart from the sealing layer by a predetermined distance in a first direction, and comprising a plurality of discharge holes to discharge the gas to the outside,
wherein the sealing layer is a freestanding layer stacked on the mesh member in the first direction,
wherein the sealing layer comprises a plurality of vent holes to discharge a gas generated inside the module housing to the outside,
wherein a pillar portion protruding in an outward direction is provided on an outer surface of the discharge member, the pillar portion being configured to expand a volume at a temperature higher than a predetermined temperature to seal the plurality of vent holes of the sealing layer, and
wherein the discharge member is between the sealing layer and the mesh member in the first direction.
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