Battery management apparatus, battery management method, and battery energy storage system

Abstract

A battery management apparatus 102 calculates a state of charge SOC representing the state of charge of a chargeable and dischargeable battery, a charge deterioration degree SOHQ and a resistance deterioration degree SOHR, corrects the calculated SOHR, corrects an mid resistance MidDCR corresponding to a mid voltage MidVoltage according to a correction coefficient in accordance with SOHR for MidDCR (corrected SOHR), calculates MidVoltage (a mid voltage present between a discharge voltage in the current state of charge of the battery, and a voltage value representing a discharge voltage in the minimum state of charge of the battery), calculates the remaining capacity of the battery based on SOC and SOHQ, and calculates the available energy of the battery based on the mid voltage and the remaining capacity.

CPC Classifications