APPARATUS FOR DIAGNOSING STATE OF BATTERY AND METHOD THEREOF

Disclosed are an apparatus for diagnosing a state of a battery and a method thereof. The apparatus includes an ultrasonic sensor that generates an ultrasonic signal on one side of the battery and receives an ultrasonic signal transmitted through the battery from an opposite side of the battery, and a controller that detects a signal amplitude (SA) based on the ultrasonic signal, determines a state of health (SOH) of the battery, determines total energy of the battery by using a lifespan curve corresponding to the SOH and SA of the battery, and determines a residual value of the battery based on the total energy of the battery.