SECONDARY BATTERY

摘要

PURPOSE: A secondary battery is provided to vary the selection of a sealing unit for sealing an electrolyte injector and to improve the reliability of sealability. CONSTITUTION: A secondary battery comprises: an electrode assembly; an external case(200) housing the electrode assembly; at least one electrode terminal(300) which is electrically connected to the electrode assembly and is arranged in the external case in order to be exposed to the outside of the external case; and an electrolyte injector penetrated to the electrode terminal in order to inject electrolyte into the external case. The secondary battery further includes a sealing unit(500) for sealing an electrolyte injector.