SECONDARY BATTERY

The purpose of the present disclosure is to provide a secondary battery in which a current interruption function of an electrode tap can be enhanced during an external short circuit, and a temperature rise in the battery can be effectively suppressed. A secondary battery according to one embodiment of the present disclosure is provided with: an electrode assembly having a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode; a sealing assembly constituting a positive terminal; a case body constituting a negative terminal; a positive electrode tap connecting the positive electrode and the sealing assembly; and a negative electrode tap connecting the negative electrode and the case body, wherein the positive electrode has a fuse part which has a relatively small cross-sectional area in the positive electrode, and the fuse part of the positive electrode is metallurgically bonded to the sealing assembly.