SECONDARY BATTERY COMPONENT, MANUFACTURING METHOD THEREOF, SECONDARY BATTERY MANUFACTURED USING COMPONENT, AND ASSEMBLED SECONDARY BATTERY DEVICE

The present invention describes a component for a secondary battery and a manufacturing method thereof, and a secondary battery manufactured by using the component. The component for a secondary battery according to the present invention comprises a metal plate in which at least one recess line is formed; and a soldering pattern joined in the recess line. According to the present invention, when an over-current flows through the component for a secondary battery, breakage occurs at the portion where soldering pattern is joined in the recess line, thereby efficiently interrupting the flow of an over-current.