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A power following control method and system for an extended-range pure electric vehicle

A pure electric vehicle, power-following technology, applied in the field of automobile manufacturing, can solve the problems of frequent engine start, engine fuel consumption and emission that cannot be optimized, etc.

Active Publication Date: 2020-10-02
FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a power follow control method and system for an extended-range pure electric vehicle, which solves the problem that the fuel consumption and emission of the engine cannot be optimized in the traditional power follow mode, and the engine starts frequently

Method used

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  • A power following control method and system for an extended-range pure electric vehicle
  • A power following control method and system for an extended-range pure electric vehicle
  • A power following control method and system for an extended-range pure electric vehicle

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Embodiment 1

[0062] see figure 2 or image 3 , a power following control method for an extended-range pure electric vehicle provided in this embodiment, comprising steps:

[0063] S1. Collect the current remaining power value SOC of the power battery, and calculate the power demand P of the vehicle demand ; The method of collecting the current remaining power value SOC of the power battery includes the ampere-hour integral method, the remaining power estimation method based on the equivalent circuit model or the extended Kalman filter and its improved method, etc.; measuring and calculating the vehicle power demand P demand The methods include methods such as direct solution from the acceleration index.

[0064] S2. According to the remaining power value SOC and the vehicle power demand P demand , to determine whether the range extender is enabled or disabled; refer to image 3 , In the judgment process, the window for judging the start of the range extender is optimized to avoid freq...

Embodiment 2

[0088] see image 3 or Figure 4 , an embodiment of the present invention provides a power following control system for an extended-range pure electric vehicle, adopting the above-mentioned power following control method for an extended-range pure electric vehicle, the power following control system for an extended-range pure electric vehicle includes interconnected range extenders , a power battery, a controller and a drive motor, the controller includes an acquisition module, a first judgment module and a second judgment module, wherein the input end of the acquisition module is connected to the power battery and the drive motor, the output end is connected to the first judgment module, and the first The output end of the judging module is connected to the power battery and the input end of the second judging module, and the output end of the second judging module is connected to the range extender.

[0089] The acquisition module is connected to the dedicated controller of...

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Abstract

The invention discloses a power following control method and system of an extended-range full electric vehicle. The power following control method comprises the steps that firstly, whether an auxiliary power unit (APU) is turned on or turned off is judged according to a power battery residual capacity value SOC and a full vehicle power demand P<demand>, when the APU is turned on, the generated power P<APU> and an optimum operation working condition point of the APU are further judged, the APU is controlled to work under the generated power P<APU>, when the generated power of the APU follows the full vehicle power demand, power generation of the APU meets the requirements of a driving motor, a power battery is effectively prevented from high-power discharging, and improvement of the servicelife of the power battery is facilitated; and when the power generation of the APU is at the optimum working condition point, the driving motor is supplied with power, the power battery is charged, the full vehicle energy consumption is reduced, and discharging of an engine is optimized. According to the power following control system, the power following control method of the extended-range fullelectric vehicle is adopted, and the problems that in a traditional power following mode, the fuel consumption and discharging of the engine cannot achieve an optimum condition, and the engine frequently starts are solved.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, in particular to a power follow control method and system for an extended-range pure electric vehicle. Background technique [0002] Energy crisis and environmental pollution are two major crises in today's world. Vigorously developing new energy vehicles has become the only way to solve the two crises. New energy vehicles include pure electric vehicles, hybrid vehicles and fuel cell vehicles. Among them, pure electric vehicles It can achieve "zero emission" in the true sense, but it has inherent shortcomings such as low energy density of power batteries, imperfect infrastructure such as charging piles, and long charging time, which restricts its development to a certain extent. Extended range electric vehicle (E-REV), as an ideal form of transition from hybrid electric vehicle to pure electric vehicle, is to install a set of auxiliary power unit on the basis of pure electric vehicle - ran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L50/15B60L58/12
CPCB60L50/15B60L58/12B60L2240/40B60L2240/54Y02T10/70Y02T10/7072
Inventor 刘庆鹏曾庆强曹永昌兰文刀
Owner FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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