There are provided a battery management system, a battery pack, an electric vehicle and a battery management method. The battery management system includes a sensing unit to detect a terminal voltage and a charge/discharge current of a battery having a characteristic that a voltage variation section changes depending on a current rate, a memory unit to store a first Kalman filter using an equivalent circuit model and a state of charge (SOC)-open circuit voltage curve of the battery and a second Kalman filter using a constant current charge/discharge map of the battery, and a control unit to determine a first estimated SOC by inputting a voltage value of the terminal voltage, a current value of the charge/discharge current and an estimated SOC in a previous cycle to the first Kalman filter, determine a second estimated SOC by inputting the current value and the estimated SOC in the previous cycle to the second Kalman filter.
BATTERY MANAGEMENT SYSTEM, BATTERY PACK, ELECTRIC VEHICLE AND BATTERY MANAGEMENT METHOD
BATTERIEVERWALTUNGSSYSTEM, BATTERIEPACK, ELEKTROFAHRZEUG UND BATTERIEVERWALTUNGSVERFAHREN
SYSTÈME DE GESTION DE BATTERIE, BLOC-BATTERIE, VÉHICULE ÉLECTRIQUE ET PROCÉDÉ DE GESTION DE BATTERIE
2025-06-25
Patent
Electronic Resource
English
Battery management system, battery management method, battery pack and electric vehicle
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