Battery module, battery pack including battery module, and vehicle including battery pack

1. A battery module, comprising:

a plurality of battery cells stacked on one another;

a cell housing configured to accommodate the plurality of battery cells;

a top plate configured to cover an entire upper side of the cell housing and electrically connected to one of positive electrodes and negative electrodes of the plurality of battery cells;

a bottom plate disposed to face the top plate and configured to cover an entire lower side of the cell housing and electrically connected to the other of the positive electrodes and the negative electrodes of the plurality of battery cells;

a phase change material filled in the cell housing so that the plurality of battery cells are partially submerged therein to a certain level and configured to guide cooling of the plurality of battery cells; and

a heatsink mounted to an upper side of the top plate to cool the plurality of battery cells, wherein the phase change material is vaporized and moves toward the top plate when a temperature of the plurality of battery cells is raised, and is liquefied by the heatsink and moves toward the bottom plate, and

wherein the battery module further comprises a guide rib provided at an upper side of an inner wall of the cell housing above the certain level to guide movement of the liquefied phase change material toward the bottom plate.

2. The battery module according to claim 1 , further comprising:

at least one cell fixing member configured to fix the plurality of battery cells so as to prevent the plurality of battery cells from moving inside the cell housing.

3. The battery module according to claim 2 ,

wherein the cell fixing member is provided in a pair, and

wherein the pair of cell fixing members include:

an upper cell fixing member into which an upper portion of the plurality of battery cells is inserted, the upper cell fixing member being fixed to an upper side of an inner surface of the cell housing; and

a lower cell fixing member into which a lower portion of the plurality of battery cells is inserted, the lower cell fixing member being fixed to a lower side of the inner surface of the cell housing.

4. The battery module according to claim 3 ,

wherein a plurality of upper cell insert holes are formed in the upper cell fixing member and a plurality of lower cell insert holes are formed in the lower cell fixing member so that the plurality of battery cells are inserted therein.

5. The battery module according to claim 1 ,

wherein a rim of the top plate is coupled to a rim of the cell housing by seaming.

6. The battery module according to claim 1 ,

wherein the top plate is coupled to the one of the positive electrodes and the negative electrodes of the plurality of battery cells by welding.

7. The battery module according to claim 1 ,

wherein the bottom plate is coupled to the other of the positive electrodes and the negative electrodes of the plurality of battery cells by welding.

8. The battery module according to claim 1 ,

wherein the plurality of battery cells are cylindrical secondary batteries.

9. A battery pack, comprising:

at least one battery module as defined in claim 1 ; and

a pack case configured to package the at least one battery module.

10. A vehicle, comprising:

at least one battery pack as defined in claim 9 .

11. The battery module according to claim 1 , wherein the guide rib extends away from the inner wall of the cell housing towards an interior of the cell housing.