Secondary battery

摘要

Provided is a secondary battery, which can prevent explosion and fire of the battery by melting a safety film formed on an electrode tab to quickly clear a sealed state of a case when the internal temperature or pressure of the battery rises. The secondary battery includes an electrode assembly including a first electrode tab and a second electrode tab, and a case accommodating the electrode assembly such that the electrode tab is exposed to the outside. At least one of the first and second electrode tabs has a recess formed lengthwise on at least one of top and bottom surfaces of the at least one of the first and second electrode tabs, and a safety film is positioned in the recess.

主权项

1. A secondary battery, comprising:
an electrode assembly including a first electrode tab and a second electrode tab;and a case accommodating the electrode assembly such that the first and second electrode tabs are exposed to the outside of the case,
at least one of the first and second electrode tabs has a recess formed to extend in a lengthwise direction of the at least one of the first and second electrode tabs on at least one of top and bottom surfaces of the at least one of the first and second electrode tabs, and a safety film, having a same size as a size of the recess, is positioned in the recess.