Life cycle cost and battery temperature optimization method based on electric vehicle battery

Abstract

The invention discloses a life cycle cost and battery temperature optimization method based on an electric vehicle battery, and the method comprises the steps: building a recurrent neural network model capable of predicting life cycle states and charge states at different temperatures, a battery heating model, and a heat transfer model of the battery and an environment for analyzing the influence of the life cycle cost and the endurance mileage of the battery at different battery temperatures, so that a temperature optimization value with the lowest total operation cost of the electric vehicle is given, and according to different environment temperatures, heating or cooling the battery module to achieve the optimal temperature of the battery. The power battery temperature optimization method based on balance of the battery full life cycle cost and the electric vehicle endurance has the beneficial effects that the driving power requirement, the battery full life cycle cost and the vehicle endurance mileage can be considered in the driving process; and hybrid evaluation is carried out on the endurance mileage and reduction of the whole life cycle cost of the battery, so that the driving cost and the endurance are optimized.

Description

technical field [0001] The invention relates to the technical field of battery supervision, in particular to an optimization method based on life cycle cost and battery temperature of electric vehicle batteries. Background technique [0002] The temperature mainly affects the activity of the electrode material inside the battery and the performance of the electrolyte. Too high and too low temperature have a great impact on the capacity of the battery. At low temperature, the activity of the lithium-ion battery is significantly reduced, the ability of lithium insertion and extraction is reduced, the internal resistance and polarization voltage of the battery are increased, the actual usable capacity is reduced, the discharge capacity of the battery is reduced, the discharge platform is low, and the battery is easier to reach the discharge cut-off Voltage, manifested as a decrease in the available capacity of the battery and a decrease in the energy utilization efficiency of ...

AI Technical Summary

Problems solved by technology

However, if the battery works in a high temperature environment for a long time, the stability of the positive electrode lattice structure will deteriorate, the safety of the battery will be reduced, and the life of the battery will be significantly shortened.

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