Apparatus and Method for Diagnosing Battery State

Disclosed is a status diagnosis apparatus and method that may detect a cycle in which a first abnormal event occurs based on voltages of the battery when diagnosing an abnormality of a battery in progress of charging and discharging and determine the occurrence of a battery abnormality in an instance a second abnormal event occurs based on the OCV of the battery after the detected cycle, thereby providing improved safety and diagnostic reliability.