Method and device for controlling safe operation of electric automobile

Abstract

The invention relates to a safety control technology of electric automobiles. The invention discloses a method for controlling safe operation of an electric automobile and a device for controlling the safe operation of the electric automobile, aiming at the defect of a method of controlling sudden loss of voltage of a power battery pack of the electric automobile in the prior art. The method comprises the following steps of: detecting the working state of a power battery pack in real time by an acquiring module; transmitting the acquired signal to a control module to determine whether the voltage is lost based on the received signal, and forecasting and estimating the dynamic characteristics of the power battery pack; transmitting the running mode signal of a motor to the control module through a communication module; if the loss of voltage is detected, quickly starting a step-up module through the control module; when the voltage is increased to a given value, controlling a switching module to act, and controlling the electric automobile to run in a related mode enable certain endurance for the electric automobile. By using the method and device for controlling the safe operation of the electric automobile, the electric automobile with fault in the power battery pack can be kept in the original state for a time, therefore, a certain time is provided to the driver to handle the fault in emergency, and the traffic accidents such as rear-end collision can be avoided.

Description

technical field [0001] The invention relates to the safety control technology of the electric vehicle, in particular to the safety control technology of the sudden voltage loss of the power supply system of the electric vehicle. Background technique [0002] With the increasing number of fuel vehicles in the world, the shortage of resources and the deterioration of the environment are becoming more and more serious, it is imminent to develop a new type of non-polluting means of transportation. As a new type of energy-saving and zero-emission transportation, electric vehicles have great prospects for development. The electric vehicle power system generally includes a power battery pack composed of several batteries, an electric motor and its drive system. The direct current output by the power battery pack is converted into a PWM (pulse width modulation) pulse current through the drive system (usually composed of an inverter and a controller as the core) to drive the motor. ...

AI Technical Summary

Problems solved by technology

Although the current drive system generally has a voltage loss protection function, it controls the motor to stop quickly. However, a sudden stop of the electric vehicle will cause traffic accidents such as rear-end collisions. Therefore, it must still have a certain endurance when the power supply system suddenly loses voltage. Give the driver some emergency time

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