Battery module, battery pack comprising battery module, and vehicle comprising battery pack
A battery module includes a plurality of cylindrical 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 a 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 a positive electrode of each of the plurality of battery cells; and a phase change material filled in the cell housing so that the plurality of battery cells are partially submerged and cooling the plurality of battery cells.
1 . 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.
2 . The battery module of claim 1 , further comprising a heat sink mounted on an upper side of the top plate and configured to cool the plurality of battery cells.
3 . The battery module of claim 2 , wherein the phase change material is vaporized when a temperature of the plurality of battery cells rises to move toward the top plate, and is liquefied by the heat sink to move toward the bottom plate.
4 . The battery module of claim 3 , further comprising a guide rib provided on an upper side of an inner wall of the cell housing and configured to guide a movement of the liquefied phase change material toward the bottom plate.
5 . The battery module of claim 1 , further comprising
an upper cell fixing member into which upper portions of the plurality of battery cells are inserted and fixed to an upper side of an inner portion of the cell
housing.
6 . The battery module of claim 5 , wherein a plurality of cell insertion holes for insertion of the plurality of battery cells are formed in the upper cell fixing member.
7 . The battery module of claim 1 , wherein an edge of the top plate is seamed with an edge of the cell housing.
8 . A battery pack comprising:
at least one battery module according to claim 1 ; and
a pack case configured to package the at least one battery module.
9 . A vehicle comprising a battery pack according to claim 8 .
10 . The battery module of claim 1 , further comprising a flow path extending from an upper surface of the lower cell fixing member to at least one of the plurality of cell insertion holes.