| CPC H01M 10/6555 (2015.04) [H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/643 (2015.04); H01M 50/213 (2021.01); H01M 50/24 (2021.01); H01M 50/242 (2021.01); H01M 50/262 (2021.01); H01M 50/289 (2021.01); H01M 50/50 (2021.01); H01M 50/502 (2021.01); H01M 50/574 (2021.01); H01M 2200/00 (2013.01); H01M 2220/20 (2013.01)] | 13 Claims |
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1. A battery module comprising:
a plurality of secondary batteries disposed in a horizontal direction;
a plurality of module cases each with an empty space defined therein to accommodate a subset of the plurality of secondary batteries therein, the plurality of module cases each comprising an outer wall surrounding the respective empty space and a plurality of ribs protruding from the outer wall of each of the plurality of module cases in the horizontal direction, and the plurality of module cases including a first module case and a second module case adjacent to each other and stacked in the horizontal direction; and
an internal plate interposed between the first module case and the second module case in the horizontal direction, the internal plate being erected in a vertical direction perpendicular to the horizontal direction,
wherein the internal plate contacts a protruding end portion of each of the plurality of ribs protruding respectively from the first and second module cases,
wherein the protruding end portions of the ribs of the first module case contact the internal plate on a first surface among opposite outer surfaces of the internal plate,
wherein the protruding end portions of the ribs of the second module case contact the internal plate on a second surface, opposite the first surface of the internal plate, among the opposite outer surfaces of the internal plate,
wherein a space between the internal plate, the outer wall of the first module case, and two adjacent ribs among the ribs of the first module case defines a gas discharge passage to discharge gas to an outside of the battery module, the two adjacent ribs of the first module case being adjacent to each other in the vertical direction,
wherein the internal plate, the outer wall of the first module case, and the two adjacent ribs of the first module case completely surround the gas discharge passage in a cross-sectional view of the gas discharge passage, and
wherein the internal plate includes a first uneven structure having a first part bent in the horizontal direction, a second part bent in the vertical direction, and a third part bent in the horizontal direction to form a first rectangular protrusion inserted between the two adjacent ribs of the first module case and contacting a horizontal surface of at least one of the two adjacent ribs of the first module case in the cross-sectional view.
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