| 摘要 |
A secondary battery having no beading portion includes an electrode assembly having a cathode plate and an anode plate arranged with a separator being interposed therebetween, a battery case having an upper can configured to accommodate the electrode assembly and an electrolytic solution in an inner space thereof and have an open top and an open bottom, the top of the upper can being bent inwards, and a lower sealing member coupled to the bottom of the upper can to seal the bottom of the upper can, and a cap assembly having a top cap protruding on an uppermost portion thereof to form a cathode terminal, a safety vent located below the top cap and configured to change a shape when an inner pressure of the battery case increases, and a gasket surrounding rims of the top cap and the safety vent. |
