Battery module and battery pack including the same
A battery module includes a battery cell stack formed by stacking a plurality of battery cells; a module frame that houses the battery cell stack; and a compression pad disposed between the battery cells, wherein the compression pad has a porous structure.
1 . A battery module comprising:
a battery cell stack formed by stacking a plurality of battery cells;
a module frame that houses the battery cell stack; and
a compression pad disposed between the plurality of battery cells,
wherein the compression pad has a porous structure,
wherein the porous structure comprises a plurality of holes, wherein a plurality of protective inserts is respectively located in the plurality of holes, and
wherein each protective insert of the plurality of protective inserts is configured to flow to the outside of the hole by swelling of at least one battery cell of the plurality of battery cells, the plurality of protective inserts configured to combine to form a barrier film.
2 . The battery module of claim 1 , wherein:
each of the plurality of protective inserts comprises at least one of a heat absorbing member and a heat insulating member.
3 . The battery module of claim 1 , wherein:
the barrier film comprises a first barrier film formed between the battery cell and the compression pad.
4 . The battery module of claim 3 , wherein:
the barrier film further comprises a second barrier film formed between the battery cell stack and an upper plate of the module frame.
5 . The battery module of claim 4 , wherein:
each hole of the plurality of holes is configured to deform to an elliptical shape due to the swelling of the battery cell.
6 . The battery module of claim 5 , wherein:
the elliptical shape is formed long in a direction in which an electrode lead of the battery cell protrudes.
7 . The battery module of claim 2 , wherein:
the heat absorbing member or the heat insulating member comprises a fire extinguishing agent containing at least one of sodium hydrogen carbonate, potassium hydrogen carbonate, and monoammonium phosphate.
8 . The battery module of claim 1 , wherein:
the compression pad is formed of at least one of urethane, polyurethane, low-density polyether, and polyester.
9 . A battery pack comprising the battery module of claim 1 .