Patent ID: 11536775

Abstract:
Disclosed is a system for predicting the lifetime of a battery being chargeable and dischargeable using charge-discharge characteristics in a Battery Management System (BMS). The system includes: a battery state measurement unit measuring a voltage, a State of Charge (SOC), and a Depth of Discharge (DOD) of a battery while charging and discharging the battery with changing charge current and discharge current; an irreversible energy amount deriving unit deriving an irreversible energy amount (Qir) that is generated when the battery is charged/discharged from the voltage and the SOC using enthalpy and entropy theory; and a remaining lifetime prediction unit predicting a remaining lifetime of the battery from the derived irreversible energy amount (Qir), in which the remaining lifetime of the battery is predicted by equation According to the present disclosure, the voltage/SOC relationship is examined clearly in terms of entropy and influence by temperature is expressed as V/SOC result, whereby it is possible to estimate the lifetime of a battery without temperature and temporal components.