Battery state of charge presumed method of battery management system for electric vehicle

The present invention, a current sensor, comprising the steps of: measuring a discharge current, voltage and temperature of the battery via a voltage sensor and a temperature sensor, a voltage characteristic of the battery discharge current on the state of charge estimation battery for an electric vehicle, the battery management system for and adjusting a parameter required for the SOC estimation by the steps of: using a pew cut (Peukert) equation for the discharge current of the measured battery through the current sensor estimate the SOC, when the SOC estimation is done , that when the step of determining whether the discharge current is contained within the given current area measured by the current sensor, the measured discharge current is contained within the given current zone, increased by 1 to IV check value (IV_Chk), and then, the increased IV and determining whether the checked value is more than the given value, if the IV check value is more than a specified value, the estimated SOC compensation curve for a given discharge current Compensating for, using SOC estimates, and when the compensation is done on the SOC estimate, the IV check value (IV_Chk) initialization, By compensating comprises a step of displaying completion of SOC battery voltage for the discharge current of the battery for the estimating the SOC of the battery from the precise SOC characteristic curve makes it possible to compensate for the current SOC estimation in real time. Electric cars, battery management system, battery and charging status