Patent ID: 8557420

Claim:
A secondary battery, comprising: an electrode assembly including a first electrode plate having a first tab made from the same material as the first electrode plate; a first active material coated on a surface of the first electrode plate but not the first tab; a second electrode plate having a second tab made from the same material as the second electrode plate; a second active material coated on a surface of the second electrode plate but not on the second tab; a separator; a case having a receiving portion for receiving the electrode assembly and an electrolyte therein; a first lead having a first end connected to the first tab and a second end extending through the case; a second lead having a first end connected to the second tab and a second end extending through the case; and a blowing agent applied on at least one of the first tab and the second tab which are located within the receiving portion, the blowing agent expanding at a predetermined temperature.