Secondary battery

1. A secondary battery, comprising:

a first electrode assembly, the first electrode assembly including a first positive electrode uncoated portion and a first negative electrode uncoated portion;

a second electrode assembly horizontally parallel with the first electrode assembly, the second electrode assembly including a second positive electrode uncoated portion and a second negative electrode uncoated portion;

a first collector plate that is electrically connected to the first positive electrode uncoated portion;

a second collector plate that is electrically connected to the second positive electrode uncoated portion;

a third collector plate that is electrically connected to the first negative electrode uncoated portion and to the second negative electrode uncoated portion;

a case accommodating the first electrode assembly, the second electrode assembly, the first collector plate, the second collector plate, and the third collector plate; and

a cap plate sealing the case,

wherein the third collector plate includes:

a third horizontal part between the cap plate and the first electrode assembly,

a third vertical part that is bent to extend from the third horizontal part to a lower portion of the case, and

a fuse hole that passes through the third horizontal part.

2. The secondary battery as claimed in claim 1 , wherein the third vertical part is between the first electrode assembly and the second electrode assembly.

3. The secondary battery as claimed in claim 1 , wherein:

the third horizontal part includes:

a first long side surface and a second long side surface facing each other; and

a first short side surface and a second short side surface facing each other, the first short side surface and the second short side surface connecting the first long side surface and the second long side surface, and

the fuse hole is adjacent to the first short side surface.

4. The secondary battery as claimed in claim 3 , wherein the third vertical part:

is adjacent to the first short side surface, and

includes a front vertical part on the first long side surface and a rear vertical part on the second long side surface.

5. The secondary battery as claimed in claim 4 , wherein:

the first negative electrode uncoated portion is coupled with the front vertical part, and

the second negative electrode uncoated portion is coupled with the rear vertical part.

6. The secondary battery as claimed in claim 3 , wherein the fuse hole has a width that is greater than a width of the third vertical part.

7. The secondary battery as claimed in claim 3 , wherein:

the third horizontal part includes a fuse area adjacent to the third vertical part, the fuse area being between the fuse hole and the first long side surface and between the fuse hole and the second long side surface, and

the fuse area is meltable such that the fuse area separates the first electrode assembly and the second electrode assembly from each other when a short-circuit occurs in the secondary battery.

8. The secondary battery as claimed in claim 3 , wherein the third horizontal part includes a terminal hole therein, the terminal hole being adjacent to the second short side surface.

9. The secondary battery as claimed in claim 3 , wherein the fuse hole penetrates at least a portion of the first short side surface.

10. The secondary battery as claimed in claim 3 , wherein the third collector plate is between the first collector plate and the second collector plate.

11. The secondary battery as claimed in claim 1 , wherein the first collector plate includes:

a first horizontal part between the cap plate and the first electrode assembly, the first horizontal part being coupled with a bottom surface of the cap plate, and

a first vertical part that is bent to extend from the first horizontal part to a lower portion of the case.

12. The secondary battery as claimed in claim 1 , wherein the second collector plate includes:

a second horizontal part between the cap plate and the second electrode assembly, the second horizontal part including a terminal hole therein, and

a second vertical part that is bent to extend from the second horizontal part to a lower portion of the case.

13. The secondary battery as claimed in claim 1 , further comprising:

a first electrode terminal passing through the cap plate at one side of the cap plate; and

a second electrode terminal passing through the cap plate at another side of the cap plate.

14. The secondary battery as claimed in claim 13 , wherein the first electrode terminal is electrically connected to the third collector plate.

15. The secondary battery as claimed in claim 13 , wherein the second electrode terminal is electrically connected to the second collector plate.

16. The secondary battery as claimed in claim 1 , wherein:

the first collector plate and the second collector plate are electrically connected to the cap plate, and

the third collector plate is insulated from the cap plate.

17. The secondary battery as claimed in claim 1 , wherein the case includes a bottom surface and a pair of long side surfaces and a pair of short side surfaces upwardly extending from the bottom surface.

18. The secondary battery as claimed in claim 17 , wherein:

the first positive electrode uncoated portion is at one side of the first electrode assembly,

the first negative electrode uncoated portion is at another side of the first electrode assembly,

the first positive electrode uncoated portion is adjacent to one of the short side surfaces of the case, and

the first negative electrode uncoated portion is at a center of the case.

19. The secondary battery as claimed in claim 17 , wherein:

the second positive electrode uncoated portion is at one side of the second electrode assembly,

the second negative electrode uncoated portion is at another side of the second electrode assembly,

the second positive electrode uncoated portion is adjacent to one of the short side surfaces of the case, and

the second negative electrode uncoated portion is at a center of the case.

20. A secondary battery, comprising:

a first electrode assembly, the first electrode assembly including a first positive electrode uncoated portion and a first negative electrode uncoated portion;

a second electrode assembly horizontally parallel with the first electrode assembly, the second electrode assembly including a second positive electrode uncoated portion and a second negative electrode uncoated portion;

a first collector plate that is electrically connected to the first positive electrode uncoated portion;

a second collector plate that is electrically connected to the second positive electrode uncoated portion;

a third collector plate that is electrically connected to the first negative electrode uncoated portion and to the second negative electrode uncoated portion;

a case accommodating the first electrode assembly, the second electrode assembly, the first collector plate, the second collector plate, and the third collector plate; and

a cap plate sealing the case,

wherein the second collector plate includes:

a second horizontal part between the cap plate and the second electrode assembly, the second horizontal part including a terminal hole therein, and

a second vertical part that is bent to extend from the second horizontal part to a lower portion of the case.