ELECTRODE WINDER FOR CYLINDRICAL LITHIUM BATTERY AND STRAIGHTENING METHOD FOR POSITIVE ELECTRODE OF CYLINDRICAL LITHIUM BATTERY

PROBLEM TO BE SOLVED: To provide an electrode winder for a cylindrical lithium battery capable of straightening the bending of a positive electrode and a straightening method for the positive electrode of the cylindrical lithium battery. SOLUTION: This electrode winder 30 feeds the ribbon-shaped positive electrode 13 from a positive electrode feed roll 31, feeds a ribbon-shaped negative electrode 14 from a negative electrode feed roll 34, feeds a ribbon-shaped first separator 15 from a first separator feed roll 37, feeds a ribbon-shaped second separator 15 from a second separator feed roll 41, and stackingly rewinds the fed positive electrode 13, negative electrode 14 and first and second separators 15 and 15 around a rewind roll 45. This electrode winder 30 is provided with a positive electrode tension adjusting means 50 for applying a prescribed tension to the positive electrode 13 in order to straighten the bending of the positive electrode 13 fed from the positive electrode feed roll 31.