Secondary battery

摘要

Provided is a secondary battery including a fuse part that can continually function as a fuse. In the state where a first short circuit plate contacts a connecting plate to form a short circuit, even when heat generated from the short circuit melts the first short circuit plate, a second short circuit plate contacts the connecting plate to maintain a short circuit state, so that the fuse part can continually function as a fuse. The secondary battery includes an electrode assembly, a case accommodating the electrode assembly, a cap assembly including a cap plate sealing the case and having a short circuit hole, and a short circuit assembly including a first short circuit plate, a second short circuit plate, and a connecting plate. The first short circuit plate is disposed in the short circuit hole. The second short circuit plate contacts a lower part of the first short circuit plate. The connecting plate is spaced apart from the cap plate and is disposed outside the cap plate to cover the short circuit hole.

主权项

1. A secondary battery comprising:
an electrode assembly; a case housing the electrode assembly; a cap assembly sealing the case, the cap assembly comprising a cap plate; and a short circuit assembly comprising:
a first short circuit plate having an edge portion coupled to the cap plate; anda second short circuit plate having an edge portion coupled to the cap plate,wherein the second short circuit plate is thicker than the first short circuit plate.