Electric vehicle, power battery power management method and management system

Abstract

The invention discloses an electric automobile, a power battery electric quantity management method and a management system, wherein the power battery electric quantity management method comprises the following steps of obtaining the rest electric quantity of a power battery; calculating the first ratio of the rest electric quantity to the total electric quantity of the power battery; judging whether the first ratio is greater than the preset ratio or not; if so, controlling the power battery to work in a normal mode; performing returning to obtain the rest electric quantity of the power battery; if not, controlling the power battery to stop working and judging whether the electric automobile receives an emergency instruction or not; if so, controlling the power battery starts to work in an emergency mode, wherein the preset ratio is greater than zero; and after the electric automobile is re-started, controlling the power battery to work in a normal mode. The power battery electric quantity management method has the advantage that the goal of avoiding the defect that the electric automobile cannot run to a safe position for waiting for the rescue or cannot run to a charging station to be charged since a driver does not take notice of the rest electric quantity insufficiency of the power battery can be achieved.

Description

technical field [0001] The invention relates to the field of electric vehicles, and more specifically, to an electric vehicle, a power management method and a management system for a power battery. Background technique [0002] In recent years, with the popularization of motor vehicles, the exhaust emissions of motor vehicles have had a great impact on the environment. Smog has become a common weather phenomenon in many cities, and smog will have a very adverse impact on people's health. Therefore, the development of more energy-saving and environmentally friendly motor vehicles has become the consensus of all walks of life. Under this trend, electric vehicles have become the choice to replace traditional vehicles with lower pollution emissions. [0003] The power battery of an electric vehicle is its power source. The mainstream electric vehicles will have a display device on the dashboard to display the remaining power of the power battery. When the remaining power displa...

AI Technical Summary

Problems solved by technology

When the electric vehicle driver does not notice that the remaining power of the power battery is insufficient, there may be a situation where the electric vehicle cannot drive because the remaining power of the power battery is zero, and if the remaining power of the power battery is zero, the electric vehicle breaks down in the downtown If the electric vehicle stays in a downtown area or on a highway, it will make it impossible for the electric vehicle to drive to a safe location for assistance or to a charging station for recharging. However, if the electric vehicle stays in a downtown area or on a highway, it may cause traffic jams or rear-end collisions and other traffic accidents. , endangering the safety of the driver's personal and property

[0004] Therefore, there is an urgent need for a power battery management method to avoid the situation that the electric vehicle cannot drive to a safe location for assistance, or cannot drive to a charging station for charging because the driver does not notice that the remaining power of the power battery is insufficient. Appear

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