| 摘要 |
The present invention relates to a secondary battery which comprises: an electrode assembly including a positive electrode plate, a separator, and a negative electrode plate which are wound around a first axis extended in the first direction, having thickness of the second direction perpendicular to the first direction and length of the third direction perpendicular to the first direction and the second direction, and having a curvature on a second axis parallel to the first axis while the length is larger than the thickness; a battery case having a curvature corresponding to the curvature, and including a body and a cover having different stiffness; and a first electrode tab and a second electrode tab connected to the positive electrode plate and the negative electrode plate respectively, and protruding from the electrode assembly in the direction perpendicular to the first direction. |
