Device for notching a secondary battery manufactured using the same

A device for notching, at an interval of a unit electrode, a continuous electrode sheet in which an electrode active material is applied to one or both surfaces thereof, to form a plurality of unit electrodes from the electrode sheet, the device comprising:

• a press to press notches on the top and the bottom of the electrode sheet at a set position;
• two or more grippers arranged at rear of the press based on a feed direction of the electrode sheet, the grippers drawing and transporting the electrode sheet by one pitch by turns, a size corresponding to the unit electrode according to operation of the press;
• and
• a tension portion arranged in front of the press based on the feed direction of the electrode sheet to apply back tension to the electrode sheet in a direction opposite to the transport direction of the gripper,
• wherein the grippers are disposed on an opposite side from the tension portion with respect to the press to allow the press to press notches while the electrode sheet is maintained under a tension between the grippers and the tension portion,
• wherein the grippers comprise a first gripper adjacent to the press and a second gripper arranged at the rear of the first gripper to alternately draw the electrode sheet such that the first gripper is located between the press and the second gripper in the feed direction,
• wherein, the grippers are moveable towards and away from the press such that, while one of the grippers draws and transports the electrode sheet away from the press, the remaining grippers move towards the press to a position for drawing,
• wherein each of the first gripper and second gripper includes an upper member disposed above the electrode sheet and a lower member disposed below the electrode sheet,
• wherein the upper member and the lower member of the first and second grippers are movable normal to the electrode sheet and parallel to the electrode sheet, and
• wherein the press presses notches between the top and the bottom of the electrode sheet such that the electrode sheet is divided into two or more line units parallel to the transport direction and two or more unit electrodes are formed at respective line units at one pitch.