Top cap for secondary battery, secondary battery including the top cap, battery pack including the secondary battery and method of manufacturing the top cap

摘要

A top cap for a secondary battery, a secondary battery including the top cap, a battery pack including the secondary battery, and a method of manufacturing a top cap for a secondary battery are provided. According to the present invention, the stiffness of the top cap against bending force can be increased by forming a connection portion connecting the central portion and the circumferential portion of the top cap to the top cap for a secondary battery.