SECONDARY BATTERY DIAGNOSIS DEVICE AND METHOD

Disclosed is a battery diagnosing technology capable of effectively diagnosing a state of a secondary battery using a charge and discharge signal extracted from the secondary battery. The secondary battery diagnosing apparatus includes a memory unit configured to store a positive electrode reference profile and a negative electrode reference profile for charge or discharge of a reference battery; a voltage measuring unit configured to measure a voltage of a target battery during a charge or discharge process; and a processor configured to generate a plurality of charge and discharge measurement profiles based on the voltages measured at a plurality of different time points by the voltage measuring unit, compare each of the plurality of generated charge and discharge measurement profiles with a simulation profile obtained from the positive electrode reference profile and the negative electrode reference profile stored in the memory unit, and determine a positive electrode adjustment profile and a negative electrode adjustment profile for each of the plurality of generated charge and discharge measurement profiles so that an error between each charge and discharge measurement profile and the simulation profile is within a predetermined level.