Extended Range Electric Vehicle (EREV) auxiliary power unit power distribution method, device and vehicle

Abstract

The invention provides an Extended Range Electric Vehicle (EREV) auxiliary power unit power distribution method, device and a vehicle; the auxiliary power unit is arranged in the EREV power system; the method comprises the following steps: obtaining the demanding total power of the EREV power system and the maximum allowed charge and discharge power of a power battery of the EREV power system; determining the target output power of the auxiliary power unit according to the demanding total power and the maximum allowed charge and discharge power. Along with vehicle driving, the residual power and temperature of the power battery change as well, and the maximum allowed charge and discharge power will also change; the demanding total power of the power system is related to real time states of the vehicle; the target output power of the auxiliary power unit is determined according to the demanding total power and the maximum allowed charge and discharge power, so the method and device can perform dynamic changes along with working conditions and vehicle running states, thus complying with vehicle real running states, and optimizing the vehicle economic performance.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a power distribution method and device for an auxiliary power unit of an extended-range electric vehicle and the vehicle. Background technique [0002] Range-extended electric vehicles, which not only have the characteristics of simple structure of electric vehicles, but also make up for the performance defects of current electric vehicle batteries with insufficient energy, are one of the main directions of the current development of hybrid electric vehicles. The power system structure of the extended-range electric vehicle is as follows: figure 1 As shown, it includes an auxiliary power unit 1 (Auxiliary PowerUnit, APU), a power battery 2, a drive motor 3, a transmission mechanism 4 and a vehicle control unit 5, wherein the drive motor 3 is the main power source of the extended-range electric vehicle, and the drive transmission The mechanism 4 drives the wheels to rot...

AI Technical Summary

Problems solved by technology

Although this method is easy to implement, its control effect cannot be dynamically changed with the working conditions and vehicle operating conditions, and the power of the auxiliary power unit is often limited to one or several fixed values, so it is difficult to obtain a global optimal control Effect, can not make the economic performance of the vehicle to achieve the best

Images