Battery module, and battery pack and vehicle comprising same
Discussed is a battery cell assembly that may include a plurality of battery cells, a bus bar assembly on the battery cell assembly and electrically connected to the plurality of battery cells, a cooling unit spaced apart by a certain distance from the bus bar assembly and configured to cool the battery cell assembly, and a potting resin on at least one of an upper side and a lower side of the battery cell assembly.
1 . A battery module comprising:
a battery cell assembly comprising a plurality of battery cells;
a bus bar assembly on the battery cell assembly and electrically connected to the plurality of battery cells;
a cooling unit spaced apart by a certain distance from the bus bar assembly and configured to cool the battery cell assembly;
a potting resin on at least one of an upper side and a lower side of the battery cell assembly; and
at least one of a lower side and an upper side of the plurality of battery cells including a vent unit, the vent unit being configured to discharge gas therethrough,
wherein the potting resin is filled between the plurality of battery cells and contiguously further contacts and covers of the vent unit,
wherein each of the plurality of battery cells includes the vent unit integrated into an end portion of each of the plurality of battery cells, and
wherein a thickness of the vent unit is less than a thickness of a peripheral portion of an end portion of the end portion of each of the plurality of battery cells.
2 . The battery module according to claim 1 , wherein the bus bar assembly is on the upper side of the battery cell assembly, and
wherein the potting resin is further filled to cover the bus bar assembly.
3 . The battery module according to claim 1 , wherein the cooling unit is on the lower side of the battery cell assembly.
4 . The battery module according to claim 1 , wherein the cooling unit has a certain length in a stack direction of the battery cell assembly, and is between the upper side and the lower side of the battery cell assembly.
5 . The battery module according to claim 1 , wherein the vent unit is provided under each of the plurality of battery cells,
wherein the potting resin is filled to entirely overlap and cover the vent unit of each of the plurality of battery cells at the lower side of the battery cell assembly.
6 . The battery module according to claim 1 , wherein the potting resin comprises a thermally conductive material.
7 . The battery module according to claim 1 , wherein the potting resin comprises a phase-change material.
8 . The battery module according to claim 7 , wherein the potting resin comprises a paraffin material.
9 . The battery module according to claim 1 , wherein the potting resin comprises a flame retardant.
10 . A battery pack comprising:
at least one of the battery module according to claim 1 ; and
a pack case for packaging the at least one of the battery module.
11 . A vehicle comprising at least one of the battery pack according to claim 10 .
12 . The battery module according to claim 1 , further comprising a bottom frame under the plurality of battery cells to support the plurality of battery cells.
13 . The battery module according to claim 12 , wherein a lower end portion of each of the plurality of battery cells is inserted into the bottom frame.
14 . The battery module according to claim 12 , wherein the bottom frame is an injection frame or a metal frame.
15 . The battery module according to claim 12 , wherein the potting resin is disposed between the vent unit and the bottom frame.
16 . The battery module according to claim 12 , wherein portions of the bottom frame contact bottom surfaces of the plurality of battery cells.
17 . The battery module according to claim 1 , further comprising a plurality of insulating tubes to cover outer circumferential surfaces of the plurality of battery cells, respectively.
18 . The battery module according to claim 1 ,
wherein a top surface of the potting resin between the plurality of battery cells is located lower than top surfaces of the plurality of battery cells.
19 . The battery module according to claim 1 , further comprising an adhesion member on at least one of the upper side and the lower side of the battery cell assembly.
20 . The battery module according to claim 1 , further comprising a top frame located on the upper side of the battery cell assembly.