WINDER FOR ELECTRODE GROUP OF SECONDARY BATTERY AND METHOD FOR MANUFACTURING ELECTRODE GROUP USING THE SAME

PROBLEM TO BE SOLVED: To provide a winder for an electrode group of a secondary battery, capable of improving productivity by shortening a winding cycle.SOLUTION: The winder for an electrode group of a secondary battery includes: a nip roll 41 catching and feeding a positive electrode plate 10, a negative electrode plate 20 and separators 31, 32; a rotor 43 arranged below the nip roll to rotate; and a plurality of winding cores 51, 52, 53 which are arranged in the rotor at an equal interval along a rotation direction of the rotor to rotate and move forward or backward from the rotor. The center of the nip roll, the center of any one of the plurality of winding cores, and one surface of an electrode group of other one winding core whose winding is completed form a straight line.