Electrode sheet drying apparatus capable of preventing thermal wrinkles in non-coated portion

An electrode sheet drying apparatus for drying an electrode sheet comprising a metal foil having a pair of coated portions each having an electrode active material applied to a first surface of the metal foil and a non-coated portion located between the pair of coated portions, the non-coated portion having no electrode active material applied thereto, the electrode sheet drying apparatus comprising:

• a chamber configured to dry the electrode sheet therein, the chamber having a rectangular cross-sectional shape;
• a heater provided at an upper part of the chamber, the heater being configured to adjust a temperature in the chamber at or above a minimum temperature necessary to dry the electrode sheet;
• and
• a guide roll configured to guide movement of the electrode sheet in the chamber and to maintain a tension of the electrode sheet, the apparatus being configured such that a part of the electrode sheet is moved in a state of being spaced apart from a confronting part of the guide roll by a predetermined distance.