Battery pack having structure with increased movement and ease of assembly and structure with improved safety, and ESS comprising same
A battery pack includes a pair of battery modules having a plurality of first partition walls formed to extend downward from a lower surface thereof, a supporting plate having a plurality of second partition walls formed to extend upward from an upper surface thereof and a gas discharge hole formed at a longitudinal center thereof, the supporting plate being coupled to a bottom of the pair of battery modules such that plurality of first partition walls and the plurality of second partition walls are adjacent and overlap each other in one-to-one pairs and a BMS assembly coupled to an upper portion of the pair of battery modules in a plug-in type.
1 . A battery pack, comprising:
a pair of battery modules, each battery module of the pair of battery modules having a lower surface and a plurality of first partition walls extending downward from the lower surface;
a supporting plate having a plurality of second partition walls extending upward from an upper surface and a gas discharge hole formed at a longitudinal center, the supporting plate being coupled to a bottom of the pair of battery modules such that the plurality of the first partition walls and the plurality of second partition walls are adjacent and overlap each other in one-to-one pairs; and
a Battery Management System (BMS) assembly coupled to an upper portion of the pair of battery modules,
wherein the plurality of first partition walls are spaced apart from the supporting plate, and the plurality of second partition walls are spaced apart from the lower surface of the pair of battery modules.
2 . The battery pack according to claim 1 ,
wherein at least a part of the plurality of second partition walls has a partition wall hole formed in a region contacting the lower surface of the pair of battery modules and faces the first partition wall.
3 . The battery pack according to claim 1 , wherein each battery module of the pair of battery modules includes:
a cell stack having a plurality of battery cells;
a module housing configured to accommodate the cell stack;
a lower cover configured to cover a bottom opening of the module housing; and
an upper cover assembly configured to cover a top opening of the module housing.
4 . The battery pack according to claim 3 , wherein a gas channel is formed between the cell stack and the module housing.
5 . The battery pack according to claim 4 , wherein the lower cover has lower cover holes formed at longitudinal sides thereof to communicate with the gas channel.
6 . The battery pack according to claim 5 , wherein a mesh filter is inserted into at least one of the gas discharge hole and the lower cover holes.
7 . The battery pack according to claim 3 , wherein the upper cover assembly includes:
an upper cover configured to cover the top opening of the module housing, the upper cover having a connector formed at one longitudinal side thereof and an upper cover groove formed at a center thereof to be concave downward;
a fuse fixed in the upper cover groove and electrically connected to the plurality of battery cells;
a fuse cover configured to cover the fuse inside the upper cover groove; and
a cover plate configured to cover a top of the upper cover groove and coupled to the upper cover.
8 . The battery pack according to claim 7 , wherein the cover plate has at least one pair of cover plate holes and is spaced apart from the fuse cover so that a first grip groove is formed between the cover plate and the fuse cover.
9 . The battery pack according to claim 8 , wherein the BMS assembly includes:
a BMS body coupled to the pair of battery modules; and
a BMS cover coupled to an upper portion of the BMS body.
10 . The battery pack according to claim 9 , wherein the battery pack has second grip grooves formed between a longitudinal side of the BMS cover and a longitudinal side of the BMS body.
11 . The battery pack according to claim 9 , wherein the BMS body includes a guide protrusion formed at a lower surface thereof and inserted into the first grip groove through the cover plate to guide coupling between the BMS assembly and the pair of battery modules.
12 . The battery pack according to claim 11 , further comprising:
a gasket interposed between the guide protrusion and an inner surface of the at least one pair of cover plate holes.
13 . The battery pack according to claim 1 , wherein the supporting plate is fixed to the ground.
14 . An Energy Storage System, comprising at least one battery pack according to claim 1 .