PART FOR SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME, AND SECONDARY BATTERY AND MULTI-BATTERY SYSTEM MANUFACTURED USING THE PART

摘要

The present invention discloses a part for a secondary battery, a method for manufacturing same, and the secondary battery manufactured by using the part. The part for the secondary battery, according to the present invention, comprises: a lead-free soldering bridge having a melting point of 150 to 300 degrees and containing tin (Sn) and copper (Cu) as main components; and a first metal plate and a second metal plate, which are separated with a small gap therebetween and are coupled to the lead-free soldering bridge. According to the present invention, when an overcurrent flows through the part for the secondary battery, the temperature of the lead-free soldering bridge locally rises to the melting point in a short period of time, thereby effectively blocking the flow of the overcurrent.