Electric vehicle braking energy recovery method and electric vehicle

Abstract

The invention discloses a recycling method for braking energy of an electric vehicle and the electric vehicle and belongs to the field of vehicles. The electric vehicle comprises a man-machine control device, a vehicle controller, a motor and a battery. When the motor receives a braking energy recycling request, target reverse torque is determined, and the motor works reversely so as to convert the braking energy of the electric vehicle into electric energy to be stored in the battery. The target reverse torque is determined according to a target recycling grade which is one of the multiple recycling grades used for indicating the magnitude of the output power of the motor, therefore, for different target recycling grades, the motor works reversely with different output power, and the problem of the single braking process of the electric vehicle is solved. When the electric vehicle has the high speed before entering a braking state, the motor can works reversely with the large output power, accordingly the lasting time of the electric vehicle in the braking state is shortened, and the situation that the lasting time is excessively long, thus the safety of the electric vehicle is affected is avoided.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a braking energy recovery method of an electric vehicle and the electric vehicle. Background technique [0002] In recent years, with the improvement of energy saving and emission reduction requirements, people pay more and more attention to the energy recovery of electric vehicles. However, when an electric vehicle is in a braking state such as braking or going downhill, the current speed of the electric vehicle needs to be reduced rapidly, causing the electric vehicle to release a large amount of kinetic energy in the braking state. Traditional mechanical brakes convert the kinetic energy released in the braking state into the frictional heat energy between the tire and the ground to achieve the braking of the electric vehicle, resulting in the waste of the kinetic energy released in the braking state. Therefore, how to Recovering the kinetic energy released by electric vehicles under ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of relatively simple braking process of electric vehicles and low safety of electric vehicles during braking in the process of recovering the braking energy of electric vehicles in the related art, the embodiment of the present invention provides an electric vehicle A vehicle braking energy recovery method and an electric vehicle, the technical solutions are as follows:

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