CPC H01M 10/613 (2015.04) [H01M 50/209 (2021.01); H01M 50/262 (2021.01); H01M 50/271 (2021.01); H01M 50/317 (2021.01)] | 26 Claims |
1. A battery pack, comprising:
a lower case including:
a first lower side wall extending from a bottom surface,
a second lower side wall and a third lower side wall respectively connected with the first lower side wall and arranged so as to face each other, a height of each of the second lower side wall and the third lower side wall decreasing from a first side connected to the first lower side wall to a second side opposite the first side, and
an opening extending between the second side of the second lower side wall and the second side of the third lower side wall, the opening facing the first lower side wall;
a battery unit accommodated in the lower case and including a plurality of battery cells;
an upper case arranged to face the lower case so as to seal the battery unit, the upper case including side walls with an increasing height in a direction oriented from the first lower side wall of the lower case toward the opening;
a first ventilation part through the first lower side wall of the lower case, the first ventilation part being at a first height based on the bottom surface; and
a second ventilation part through a side wall of the upper case and facing the first ventilation part, the second ventilation part being at a second height greater than the first height based on the bottom surface.
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