Secondary battery
View Patent ↗A secondary battery includes an electrode assembly; a case housing the electrode assembly; a terminal electrically coupled to the electrode assembly, wherein the terminal includes a coupling part electrically coupled to the electrode assembly; and an extension part integral as a single piece with and extending from the coupling part; and a cap assembly sealing the case and comprising a cap plate and a short circuit plate, wherein the extension part at least partially covers the short circuit plate.
1. A secondary battery comprising:
an electrode assembly;
a case housing the electrode assembly;
a terminal electrically coupled to the electrode assembly, wherein the terminal comprises:
a coupling part electrically coupled to the electrode assembly; and
an extension part integral as a single piece with and extending from the coupling part;
a first insulating member between the cap plate and the terminal, wherein the first insulating member directly contacts and entirely covers the extension part; and
a cap assembly sealing the case and comprising a cap plate and a short circuit plate, wherein the extension part at least partially covers the short circuit plate.
2. The secondary battery of claim 1 , further comprising a collecting plate electrically coupled to the electrode assembly and a collecting terminal electrically coupled to the collecting plate and to the coupling part.
3. The secondary battery of claim 2 , wherein the collecting terminal penetrates through the cap plate and through the coupling part.
4. The secondary battery of claim 1 , wherein the short circuit plate has a reversible concave portion.
5. The secondary battery of claim 4 , wherein the extension part has an opening aligned with the concave portion of the short circuit plate.
6. The secondary battery of claim 5 , wherein the cap plate has a short circuit hole, and wherein a diameter of the opening of the extension part is smaller than a diameter of the short circuit hole.
7. The secondary battery of claim 5 , wherein the concave portion of the short circuit plate is configured to contact the extension part when the pressure within the battery reaches a threshold level.
8. The secondary battery of claim 1 , wherein the first insulating member comprises a first protrusion, wherein the terminal has an anti-rotation recess, and wherein the first protrusion is within the anti-rotation recess.
9. The secondary battery of claim 1 , wherein the first insulating member comprises a second protrusion, wherein the cap plate has an anti-rotation recess, and wherein the second protrusion is within the anti-rotation recess.
10. The secondary battery of claim 1 , wherein the cap plate has a sealing receiver recess extending around a periphery of the first insulating member.
11. The secondary battery of claim 1 , further comprising a second insulation member between the cap plate and the electrode assembly.
12. The secondary battery of claim 11 , wherein the second insulation member comprises a protrusion, wherein the cap plate comprises a recess, and wherein the protrusion is within the recess.
13. The secondary battery of claim 1 , wherein the first insulating member comprises a bottom surface, a first side wall extending from the bottom surface, and a cover extending from the first side wall which provide a space configured to accommodate the extension part.
14. The secondary battery of claim 13 , wherein the first insulating member further comprises a second side wall, wherein a height of the first side wall is greater than a height of the second side wall.
15. The secondary battery of claim 1 , wherein the cap plate includes a sealing receiver recess and wherein a portion of the first insulation member is within the sealing receiver recess.
16. The secondary battery of claim 1 , wherein the first insulating member has an opening aligned with a concave portion of the short circuit plate.