Battery pack

1. A battery pack, comprising:

a plate-shaped cooling plate, the plate-shaped cooling plate including a stopper on a bottom surface thereof at one lengthwise side of the plate-shaped cooling plate;

a plurality of battery modules, the plurality of battery modules being mounted on a planar top surface of the plate-shaped cooling plate such that surfaces of the battery modules are aligned in a coplanar manner and together directly contact the planar top surface of the plate-shaped cooling plate; and

at least one bracket on the one lengthwise side of the plate-shaped cooling plate, wherein one side of the at least one bracket is coupled with the stopper and the bottom surface of the plate-shaped cooling plate by welding,

wherein each battery module of the plurality of battery modules includes a fixing part thereon, and

wherein another side of the at least one bracket is coupled with the fixing part with a fixing member.

2. The battery pack as claimed in claim 1 , wherein the stopper downwardly protrudes from the bottom surface of the plate-shaped cooling plate and is bent and extended to the outside of the plate-shaped cooling plate in a widthwise direction of the plate-shaped cooling plate.

3. The battery pack as claimed in claim 1 , wherein the stopper and the bottom surface of the plate-shaped cooling plate at least partially surround one side region of the bracket.

4. The battery pack as claimed in claim 3 , wherein:

the one side region of the bracket includes a fixing protrusion upwardly protruding therefrom,

one side of the plate-shaped cooling plate includes a fixing hole passing through a region between top and bottom surfaces of the plate-shaped cooling plate, and

the fixing protrusion is inserted into the at least one fixing hole to couple the bracket with the plate-shaped cooling plate.

5. The battery pack as claimed in claim 4 , wherein the plate-shaped cooling plate and the bracket are coupled to each other by welding a contact surface between the bottom surface of the plate-shaped cooling plate and a top surface of the one side region of the bracket.

6. The battery pack as claimed in claim 1 , further comprising at least one other bracket on another lengthwise side of the plate-shaped cooling plate, the other lengthwise side of the plate-shaped cooling plate being parallel to the one lengthwise side of the plate-shaped cooling plate.

7. The battery pack as claimed in claim 6 , wherein the at least one bracket on the one lengthwise side of the plate-shaped cooling plate and the at least one other bracket on the other lengthwise side of the plate-shaped cooling plate are positioned to be aligned with each other.

8. The battery pack as claimed in claim 1 , further comprising an external plate covering the bottom surface of the plate-shaped cooling plate.

9. The battery pack as claimed in claim 8 , wherein the plate-shaped cooling plate and the at least one bracket on the plate-shaped cooling plate are interposed between the plurality of battery modules and the external plate.

10. The battery pack as claimed in claim 1 , wherein the one side of the bracket is parallel with and on a different plane from the other side of the bracket.

11. The battery pack as claimed in claim 8 , wherein the fixing member extends through aligned through holes in the fixing part, the bracket, and the external plate.