The invention discloses an adaptive
electric vehicle SOC
estimation method based on
big data. The time,
longitude,
latitude, SOC value, vehicle speed, total mileage value of the
odometer, and total output current of the
battery pack are collected in advance from the vehicle. and the total output
voltage of the
battery pack as the training
data set, calculate the acceleration, distance, and
energy consumption values according to the time, speed,
latitude and
longitude, current, and
voltage values in the training
data set, and then calculate the characteristic speed, acceleration, distance, and dependent variable
energy consumption values It is used to construct an extremely random
decision tree model, and then the SOC prediction model based on mileage and
energy consumption is obtained from the total mileage value, energy consumption value and SOC value of the
odometer, so that the SOC prediction model based on mileage and energy consumption is obtained according to the
genetic algorithm. The SOC prediction model, every T time, the model will update the data in the training
data set, so as to achieve the effect of adaptive prediction.