Battery pack

1 . A battery pack, comprising:

a cell assembly; and

a pack case accommodating the cell assembly in an internal space,

wherein the pack case includes a lower plate having a plate shape and a frame disposed to protrude upwardly from the lower plate,

wherein the frame has an inlet through which flame flows from the cell assembly into the internal space of the frame, and a flow path through which the flame flowing in from the inlet flows,

wherein the flow path is formed by a plurality of partition walls disposed in a length direction of the frame,

wherein the plurality of partition walls include a first partition wall disposed below the inlet, a second partition wall disposed below the first partition wall, and a separation partition wall disposed in a height direction of the frame for separation from neighboring flow paths, and

wherein the plurality of partition walls are spaced apart from each other in the height direction of the frame such that a direction of the flow path is able to be changed.

2 . The battery pack of claim 1 ,

wherein each of the plurality of partition walls is disposed such that flowing flame is diverted at least twice.

3 . The battery pack of claim 1 ,

wherein an end of the first partition wall is spaced apart from a sidewall of the frame or the separation partition wall to form a first connection flow path through which the flame flows toward a lower side of the frame, and

wherein an end of the second partition wall is spaced apart from a sidewall of the frame or the separation partition wall to form a second connection flow path disposed in a direction opposite to the first connection flow path in the length direction of the frame.

4 . The battery pack of claim 3 ,

wherein the flame flowing in through the inlet is guided along an upper surface of the first partition wall, flows in the length direction of the frame, flows downwardly through the first connection flow path, and flows in the length direction of the frame through a first flow path formed by the first partition wall and the second partition wall, and

wherein, on an end of the first flow path, the flame flows downwardly through the second connection flow path, is guided through a lower surface of the second partition wall and flows along a second flow path.

5 . The battery pack of claim 4 , wherein the frame includes a plurality of inlets spaced apart from each other in the length direction of the frame.

6 . The battery pack of claim 5 ,

wherein the flame flowing in through the plurality of inlets is separated and flows through the first connection flow path, the first flow path, and the second connection flow path forming separate flow paths, and

wherein the flame flowing through the second flow path which is connected to an outlet of the frame through which the flame is discharged.

7 . The battery pack of claim 1 ,

wherein a plurality of cell assemblies are provided, and

wherein a separation wall is disposed between the plurality of cell assemblies to separate the plurality of cell assemblies from neighboring cell assemblies.

8 . The battery pack of claim 7 , wherein cell covers are provided above and below the plurality of cell assemblies to cover the plurality of cell assemblies.

9 . The battery pack of claim 7 , wherein the frame includes a venting bracket inserted into a coupling groove provided in the separation wall of each of the plurality of cell assemblies.

10 . The battery pack of claim 9 ,

wherein the venting bracket protrudes to an inner side of the frame to seal neighboring spaces, and

wherein the venting bracket guides the plurality of cell assemblies when the plurality of cell assemblies are coupled.

11 . The battery pack of claim 10 , wherein the venting bracket includes a coupling protrusion inserted into a coupling groove provided in the separation wall of each of the plurality of cell assemblies.

12 . The battery pack of claim 1 , wherein the pack case further includes a cover member coupled to the frame to cover an upper portion of the frame.

13 . The battery pack of claim 1 , wherein the frame includes a first frame in which the inlet is formed and a second frame connected to the first frame.