Energy-saving acceleration method and device for electric vehicle

Abstract

The invention relates to an energy-saving acceleration method and device for an electric vehicle. The method includes the following steps that after an acceleration command is received, the wheel rotation speed and the acceleration of the electric vehicle are acquired; the corresponding expected acceleration is determined according to the current wheel rotation speed of the electric vehicle; and a drive signal is adjusted according to the current acceleration and the expected acceleration of the electric vehicle, and the adjusted drive signal is output to a motor driver of the electric vehicle. By the adoption of the method and device, the drive signal is adjusted according to the real-time wheel rotation speed and the real-time acceleration of the electric vehicle, the work state of a motor is automatically controlled, the stable acceleration performance of the electric vehicle is achieved under the minimum work current, the situation that the output power of the motor is too large due to improper manual acceleration control, and consequently the electric quantity of a battery is wasted is avoided, the service life of the battery is prolonged, and the running capacity of the electric vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an energy-saving acceleration method and device for electric vehicles. Background technique [0002] Electric vehicles such as electric bicycles and electric cars have gradually become popular due to their low price, environmental protection, and energy saving. In electric vehicles, the same drive motor and battery will have different driving ranges depending on the driver and vehicle design. Among them, the driver's bad driving habits seriously affect the endurance and battery life of electric vehicles. When the vehicle accelerates, it is entirely up to the driver to judge the vehicle acceleration condition. The disadvantage of this control method is that the acceleration depends entirely on the subjective feeling of the driver. When the vehicle accelerates, if the driver’s drive signal to the motor is too small, the vehicle will accelerate too slowly or cannot accel...

AI Technical Summary

Problems solved by technology

The disadvantage of this control method is that the acceleration depends entirely on the subjective feeling of the driver. When the vehicle accelerates, if the driver’s drive signal to the motor is too small, the vehicle will accelerate too slowly or cannot accelerate due to insufficient drive force of the motor; If it is too large, it will cause the motor to drive the battery current to be too large, which will seriously reduce the service life and endurance of the battery

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