Patent ID: 8778526

Claim:
A secondary battery, comprising: an electrode assembly including: a first electrode plate with a first electrode non-coated portion, the first electrode non-coated portion including a first protrusion part at an upper part of the electrode assembly, a second electrode plate with a second electrode non-coated portion, the second electrode non-coated portion including a second protrusion part at an upper part of the electrode assembly, the first and second protrusion parts extending a width of the upper part of the electrode assembly to be larger than an entire width of a lower part of the electrode assembly, the lower part of the electrode assembly including a bottom of the electrode assembly, and a separator disposed between the first and second electrode plates; first and second current collecting plates electrically connected to respective first and second electrode plates; and a case accommodating the electrode assembly and the first and second current collecting plates, the case having a shape corresponding to the first and second protrusion parts of the electrode assembly, the case having an upper width corresponding to the upper width of the electrode assembly and to the first and second current collecting plates, and a lower width corresponding to the lower width of the electrode assembly and to the bottom of the electrode assembly, the entire lower width of the case being equal to or larger than the lower width of the electrode assembly and smaller than the upper width of the electrode assembly.