A secondary battery includes: an electrode assembly including a negative electrode tab at a first end and a positive electrode tab at a second end; a case including a pair of first side portions facing each of a pair of long side portions of the electrode ...

An electrode assembly comprises an active substance-coated part and a tab part. The tab part comprises a plurality of tab pieces, overlapping parts of the plurality of tab pieces forming an overlapping region, and misaligned parts of the plurality of tab p...

A secondary battery includes: an electrode assembly including a cathode, an anode, and a separator between the cathode and the anode; a case accommodating the electrode assembly in an internal space, and including a vent portion; a cap plate covering an up...