Method for manufacturing electrode lead

A method for manufacturing an electrode lead which is comprised in a secondary battery, the method comprising:

• manufacturing each of a first electrode lead and a second electrode lead by cutting a metal plate;
• applying an adhesive to at least one of an end of the first electrode lead or an end of the second electrode lead, the adhesive being electrically conductive and comprising an electrically conductive material;
• forming a lead stack by bonding the end of the first electrode lead and the end of the second electrode lead to each other;
• placing the lead stack on a die;
• and
• applying heat at a temperature of 150° to 220° and pressure to a connection portion of the lead stack for 30 seconds to 3 minutes, thereby mechanically and electrically connecting the first electrode lead and the second electrode lead to each other through the adhesive, by using a pressing device, such that the adhesive becomes cured and provides a mechanical and electrical connection between the first electrode lead and the second electrode lead.