Method for increasing endurance mileage of electric vehicle, power management controller and vehicle

Abstract

The invention discloses a method for increasing the endurance mileage of an electric vehicle, a power management controller and a vehicle. The method comprises the following steps: receiving a requestfor increasing the range of the electric vehicle; When the battery power is larger than the deep discharge threshold power, the battery responds to the request to increase the range; Controlling thelow voltage battery to enter the deep discharge mode; Deep discharge operation mode is that the output voltage of the DC-DC converter is regulated so that the discharge current of the low-voltage battery is in the deep discharge current interval; Judging that the electric quantity of the low-voltage battery is less than or equal to the first preset electric quantity, and controlling the low-voltage battery to enter the low-current charging working mode; a small current charging operation mode is that the output voltage of the DC-DC converter is regulated so that the charging current of the low-voltage battery is in a low-current charging current interval; Judging that the electric quantity of the low-voltage battery is larger than the second preset electric quantity, and controlling the low-voltage battery to enter the deep discharge working mode; and the endurance mileage of the electric vehicle can be effectively increased.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a method for increasing the cruising range of an electric automobile, a power management controller and an automobile. Background technique [0002] With the development of the automobile industry, electric vehicles have become an inevitable choice to solve energy and emission problems. However, limited by the low specific energy, low specific power and lifespan of high-voltage power batteries, it is difficult to increase the driving range of electric vehicles. The short driving range of electric vehicles, short life of high-voltage power batteries, and poor acceleration performance have become the main factors restricting the rapid development of electric vehicles. [0003] The following introduces the working principle of the high-voltage power battery and low-voltage battery in the current electric vehicle. [0004] Electric vehicles rely on the high-voltage power...

AI Technical Summary

Problems solved by technology

However, limited by the small specific energy, specific power and life of the high-voltage power battery, it is difficult to improve the driving range of electric vehicles

The short driving range of electric vehicles, short life of high-voltage power batteries, and poor acceleration performance have become the main factors restricting the rapid development of electric vehicles.

Images