Secondary battery and manufacturing method thereof

摘要

A method of manufacturing a secondary battery, which is capable of simplifying a processing method. The method includes preparing a cap plate that closes an opening of a case, the case accommodating an electrode assembly therein and having the opening at an end thereof, forming a short-circuit portion and a vent portion on the cap plate, performing a first heat treatment on the short-circuit portion, and performing a second heat treatment on the vent portion. The secondary battery manufactured by this method is economical because the processing method is simplified and a manufacturing cost is reduced.

主权项

1. A secondary battery, comprising:
an electrode assembly having a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; a case accommodating the electrode assembly therein, the case having an opening at an end thereof; and a cap plate closing the opening of the case, with a vent portion and a short-circuit portion formed in set portions of the cap plate, wherein the vent portion and the short-circuit portion are integrated with the cap plate.