Apparatus and method for notching electrode sheet

A method for notching an electrode sheet, which continuously notches a non-coating portion formed on the electrode sheet so as to be processed as an electrode tab, the method comprising:

• an operation (a) of rotating first and second transfer rollers to transfer the electrode sheet at regular intervals;
• an operation (b) of rotating a rotation member of a jig unit in a direction perpendicular to a transfer direction of the electrode sheet about an axis parallel to the transfer direction to allow any one jig of two or more jigs provided on the rotation member to be disposed on a bottom surface of the non-coating portion disposed between the first and second transfer rollers;
• an operation (c) of allowing the rotation member to ascend by using an elevation unit so that the jig supports the bottom surface of the non-coating portion;
• an operation (d) of notching the non-coating portion supported on the jig by using the notching unit so as to be processed as an electrode tab;
• and
• an operation (e) of allowing the rotation member to descend by using the elevation unit so that the jig is separated from the electrode sheet,
• wherein the two or more jigs are detachably coupled to a coupling part provided on an outer circumferential surface of the rotation member,
• wherein each of the two or more jigs comprises a coupling piece detachably coupled to the coupling part and a supporting piece supporting the non-coating portion, and
• wherein the coupling piece includes a guide protrusion in a direction of a center of the rotation member, and the supporting piece includes a guide groove to slidably couple to the guide protrusion.

An apparatus for continuously notching an electrode sheet at a non-coating portion of the electrode sheet to be processed as an electrode tab, the apparatus comprising:

• a first and second transfer rollers provided on a bottom surface of the electrode sheet including the non-coating portion and a coating portion to transfer the electrode sheet at regular intervals;
• a jig unit provided below the electrode sheet at a location between the first and second transfer rollers, and periodically supporting the bottom surface of the non-coating portion;
• a notching unit provided above the electrode sheet to periodically notch the non-coating portion supported on the jig unit to provide the electrode tab;
• and
• an elevation unit allowing an entirety of the jig unit as a whole to descend in a direction that is away from the non-coating portion or ascend in a direction towards the non-coating portion,
• wherein the jig unit comprises:
• a rotation member provided between the first and second transfer rollers and rotated about an axis parallel to a transfer direction of the electrode sheet;
• and
• at least one jig provided on an outer circumferential surface of the rotation member to periodically support the non-coating portion at a location between the first and second transfer rollers,
• wherein the at least one jig comprises a coupling piece detachably coupled to the coupling part and a supporting piece supporting the non-coating portion, and
• wherein the coupling piece includes a guide protrusion in a direction of a center of the rotation member, and the supporting piece includes a guide groove to slidably couple to the guide protrusion.