Range-extending electric vehicle control system and method

Abstract

The invention relates to a range-extending electric vehicle control system and method, belonging to the technical field of vehicle control of electric vehicles. The range-extending electric vehicle control system comprises a vehicle-mounted power battery, a driving motor, a range extender, a transmission box, a vehicle control unit (VCU), a battery management system (BMS) and a motor control unit (MCU), wherein the range extender consists of a small-sized engine, a power-generating / driving integrated generator, an engine control unit and a power generator control unit; the range extender is used for supplying power to the vehicle-mounted power battery or directly driving the motor; the vehicle control unit is used for carrying out vehicle traveling drive control according to the driver demands and states of all subsystems of the vehicle, managing the vehicle energy and transmitting instruments of various working states to sub nodes of the range extender. According to the range-extending electric vehicle control system and method disclosed by the invention, on the promise of battery system safety and service life and with avoidance of frequent start and stop of the range extender as a target, control over power generation through braking energy recovery and control over power generation of the range extender are coordinated; and when the electric vehicle travels for a long trip, the range extender can be controlled to start or stop, and thus the requirement of extending the driving range of the vehicle is met.

Description

technical field [0001] The invention relates to an extended-range electric vehicle control system and a control method thereof, which belong to the technical field of extended-range electric vehicle vehicle control. Background technique [0002] Pure electric vehicles have technical problems such as long charging time, short mileage on a single charge, high battery cost, and short battery life. Therefore, extended-range electric vehicles can increase mileage, reduce battery costs, and lower requirements for battery energy density. Advantages in this aspect have become a method transition for the development of electric vehicles. Contents of the invention [0003] The purpose of the present invention is to provide an efficient and safe control method for an extended-range electric vehicle. The design goal of pure electric vehicles is to meet the driving range of more than 60 km, and to meet the basic driving range requirements. When traveling long distances, the range exte...

AI Technical Summary

Problems solved by technology

[0002] Pure electric vehicles have technical problems such as long charging time, short mileage on a single charge, high battery cost, and short battery life. Therefore, extended-range electric vehicles can increase mileage, reduce battery costs, and lower requirements for battery energy density. Advantages in terms of becoming a method transition for electric vehicle development

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