| CPC H01M 50/244 (2021.01) [H01M 10/6556 (2015.04); H01M 10/6568 (2015.04); H01M 50/209 (2021.01); H01M 50/258 (2021.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 50/249 (2021.01)] | 20 Claims |
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1. A battery pack comprising:
an upper case and a lower case;
a battery module stack in which battery modules are stacked between the upper case and the lower case;
a longitudinal square tube formed in left and right directions of the stacked battery modules and mounted on the battery module stack;
a vertical square tube formed in a vertical direction of the stacked battery modules and mounted on the battery module stack; and
a horizontal square tube formed in front and rear directions of the stacked battery modules and mounted on the battery module stack,
wherein the longitudinal square tube is formed of a plurality of tubes, and the plurality of longitudinal square tubes are stacked and arranged in the vertical direction between the stacked battery modules so as to be coupled with all of the battery modules formed in the left and right directions at an uppermost part and a lowermost part of the stacked battery modules,
wherein the vertical square tube is formed of a plurality of tubes, and the plurality of vertical square tubes are coupled to parts of the longitudinal square tubes respectively located on a plurality of axes of stacked vertical square tubes among stacked longitudinal square tubes in four-direction outer periphery of the battery module stack,
wherein the horizontal square tube is formed of a plurality of tubes, and the plurality of horizontal square tubes are coupled to parts of each of the vertical square tubes respectively located on a plurality of axes of the plurality of vertical square tubes, from outside of the plurality of vertical square tubes,
wherein at least one tube of the plurality of tubes of the longitudinal square tube is arranged in the left and right directions that intersects a lengthwise direction of the battery modules, and the at least one tube is arranged across a middle portion of the battery modules, and
wherein at least one tube of the plurality of tubes of the vertical square tube is directly connected to the at least one tube of the plurality of tubes of the longitudinal square tube at the middle portion of the battery modules.
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