METHOD AND SYSTEM FOR MEASURING INTERNAL RESISTANCE OF BATTERY

Provided are a method and system for measuring an internal resistance of a battery. The method includes obtaining an open circuit voltage (OCV) of the battery in an equilibrium state, obtaining a plurality of closed circuit voltages (CCVs) over time while charging or discharging the battery by using a constant current for 1 second or less, and determining an internal resistance of the battery by using the OCV and the plurality of CCVs.