Battery module, battery pack comprising battery module, and vehicle comprising battery pack

A battery module comprising:

• a plurality of battery cells disposed upright such that a positive electrode faces downward and a negative electrode faces upward;
• a cell housing configured to accommodate the plurality of battery cells;
• a top plate configured to entirely cover an upper side of the cell housing and electrically connected to the negative electrode of each of the plurality of battery cells;
• a bottom plate disposed opposite the top plate to entirely cover a lower side of the cell housing and electrically connected to the positive electrode of each of the plurality of battery cells;
• a phase change material filled in the cell housing such that the plurality of battery cells are partially submerged, and cooling the plurality of battery cells;
• a lower cell fixing member into which lower portions of the plurality of battery cells are inserted and fixed to a lower side of an inner portion of the cell housing, the lower cell fixing member having a plurality of cell insertion holes for insertion of the plurality of battery cells;
• and
• a plurality of protrusions extending upward from the bottom plate into a respective one of the plurality of cell insertion holes, each protrusion being surrounded by the phase change material in the respective cell insertion hole.