A battery electric vehicle battery management system for the estimation of remaining capacity
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The present invention discloses a method for a battery management system for electric vehicle battery remaining capacity estimation, the method comprising the steps of: starting the initialization remaining battery capacity of the battery; the current integration method according to the predicted remaining battery safety the next time, obtained by current-polarized polarization state model of the battery; open-circuit voltage estimated open circuit voltage model; estimating a battery voltage; comparing the actual and estimated battery voltage sampled voltage, calculates a voltage error; obtaining remaining amount corrected by the Kalman filter model; incorporated temperature compensation strategies and battery life, the remaining power estimating remaining capacity according to the corrected. This method reduces the computational complexity and precision requirements of the battery model, a discharge current is very suitable to rapidly change temperature and other environmental factors remaining power than the battery of electric vehicle poor estimates.