SECONDARY BATTERY

摘要

PURPOSE: A secondary battery is provided to improve charging and discharging efficiency, to suppress heating of a lead tab, to reduce electric resistance of an electrode lead tab. CONSTITUTION: A secondary battery comprises a battery unit (100) including a battery cell (110) and a lead tab (120); a frame case which includes a first support part supporting the battery cell and a second support part supporting the lead tab; and a coupling member extended toward a second support part, through a coupling hole of the lead tab. The coupling hole includes a first coupling hole (125a) which is formed in the location separated from a first edge of the lead tab at a first width; a second coupling hole (125b) which is separated from a second edge of the lead tab at a second width.