Method for manufacturing secondary battery, coupling clip for manufacturing secondary battery, and secondary battery

A method for manufacturing a secondary battery, the method comprising:

• accommodating an electrode assembly in a battery case so that an electrode lead connected to the electrode assembly protrudes from each of first and second sides of an outside of the battery case;
• sealing an outer circumferential surface of the battery case after the accommodating process to form a cell;
• coupling a coupling clip to the electrode lead after the sealing process by folding the coupling clip about a folding part of the coupling clip such that first and second sides of the coupling clip are folded over each other;
• and
• transferring the cell to a position for a next process after a gripper grips the coupling clip after the coupling process.