Battery Management System and method adjusting SOC for Battery Management System

摘要

The battery management system and the SOC value correction method of the system according to an embodiment of the present invention are a method of correcting an SOC value using a bias offset value of a current sensor for measuring a current of a battery, The remaining capacity of the battery is calculated by substituting the current, voltage and temperature of the battery into a current accumulation method and an open circuit voltage (OCV) A battery remaining capacity filtering step of filtering the remaining battery capacity of the two batteries by a Kalman filter, a battery remaining capacity filtering step using the Kalman filter, and a current accumulation method in the battery residual capacity measuring step The bias current error is calculated using the difference value of the remaining battery capacity A current compensation value feedback step of compensating the bias current error at the current value measured by the current sensor and feeding back the compensated current value to the remaining battery capacity measuring step, And a method for correcting the SOC value of the SOC.