Rechargeable battery electrode substrate notching device, notching method and rechargeable battery using the same

A rechargeable battery electrode substrate notching method, comprising:

• a first step of installing an electrode substrate on a die;
• and
• a second step of notching the electrode substrate into a stack-type electrode having a straight part and a round part by lifting a punch toward the die,
• wherein in the second step,
• the round part is notched using a round shear part of the punch, and
• the straight part is further notched using a straight shear part of the punch.

A rechargeable battery comprising:

• an electrode assembly formed by stacking a positive electrode and a negative electrode while having a separator disposed therebetween;
• and
• a pouch accommodating the electrode assembly,
• wherein the electrode assembly includes:
• an electrode plate and a composite layer disposed on at least one surface of the electrode plate, in a thickness direction, and includes a straight part and a round part in a plane, and
• the round part has a desorption part larger than zero μm and smaller than 300 μm on the composite layer.