Lead tab bending device of secondary battery cell and bending method using the same

A lead tab bending method of bending lead tabs of a plurality of secondary battery cells using a bending device comprising a first guide, a base block, a second guide, and a bending jig, the method comprising:

• a) linearly moving the base block along the first guide in a reference position where a center axis of the bending jig coincides with the center;
• b) rotating the bending jig at a predetermined angle along the second guide;
• c) moving the base block forward in one direction by a moving device which moves the base block in a direction perpendicular to a longitudinal direction of the first guide, and contacting one end of the bending jig with the lead tab;
• d) performing primary bending on the lead tab while the bending jig rotates along the second guide in an opposite direction in step b);
• and
• e) performing secondary bending on the lead tab while the base block moves linearly along the first guide in a rotational direction of the primary bending.