Battery module and battery pack including the same
A battery module for enhancing cooling performance, and a battery pack including the same may include a battery cell stack, in which a plurality of battery cells are stacked, a U-shaped frame accommodating the battery cell stack and having an opened upper portion, an upper plate covering the battery cell stack on the opened upper portion of the U-shaped frame, and a thermally conductive resin layer formed between the battery cell stack and a bottom surface of the U-shaped frame, and the upper plate may include a recessed portion formed to be recessed in a direction in which the battery cell stack is located, and a battery pack including the same.
1 . A battery module comprising:
a battery cell stack, in which a plurality of battery cells each extending in a longitudinal direction are stacked adjacent to one another in a lateral stacking direction perpendicular to the longitudinal direction;
a U-shaped frame accommodating the battery cell stack and having an opened upper portion;
an upper plate covering the battery cell stack on the opened upper portion of the U-shaped frame; and
a thermally conductive resin layer formed between the battery cell stack and a bottom surface of the U-shaped frame,
wherein the upper plate comprises a recessed portion formed to be recessed towards the battery cell stack in a vertical direction in which the battery cell stack is located, the recessed portion extending in the lateral stacking direction across all of the battery cells,
wherein the recessed portion contacts a highest point of each of the battery cells in the vertical direction and presses the battery cells in the vertical direction that is perpendicular to the lateral stacking direction and the longitudinal direction.
2 . The battery module of claim 1 , wherein,
the recessed portion increases the contact area of the battery cell stack and the thermally conductive resin layer by pressing the battery cell stack downwards.
3 . The battery module of claim 1 , wherein,
a compression pad is formed between an outermost battery cell of the battery cell stack and a side surface of the U-shaped frame, and
a thickness of a portion of the thermally conductive resin layer located underneath the compression pad is larger than a thickness of a portion of the thermally conductive resin layer located underneath the battery cell stack.
4 . The battery module of claim 1 , wherein,
the recessed portion is recessed in a rectangular shape.
5 . The battery module of claim 1 , wherein,
the recessed portion is recessed in an elliptical shape.
6 . The battery module of claim 1 , wherein,
the recessed portion is recessed along a periphery of the upper plate.
7 . The battery module of claim 1 , wherein,
the recessed portion is formed of a plurality of elongated recessed portions.
8 . The battery module of claim 7 , wherein,
each of the elongated recessed portions extend in the lateral stacking direction.
9 . A battery pack comprising the battery module of claim 1 .