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Electric vehicle, and electric vehicle sliding energy recovery method and system

An energy recovery, electric vehicle technology, applied in electric braking systems, electric vehicles, power management and other directions, can solve problems such as reduced coasting energy recovery rate and potential safety hazards

Active Publication Date: 2021-03-12
DONGFENG MOTOR CORP HUBEI
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  • Abstract
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Problems solved by technology

[0003] The present invention provides an electric vehicle and an electric vehicle coasting energy recovery method and recovery system to solve or partially solve the problem that the current electric vehicle's coasting energy recovery torque curve is only related to the vehicle speed, so under different road conditions and vehicle conditions, the coasting energy recovery is caused. The rate is reduced, and there are technical problems with certain potential safety hazards

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  • Electric vehicle, and electric vehicle sliding energy recovery method and system
  • Electric vehicle, and electric vehicle sliding energy recovery method and system
  • Electric vehicle, and electric vehicle sliding energy recovery method and system

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Embodiment Construction

[0053] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings. Throughout the specification, unless otherwise specified, terms used herein should be understood as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, this specification shall take precedence. Unless otherwise specified, various equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0054] Studies have shown that under different road conditions (such as uphill, downhill, paved roads, bad roads, etc.) The change rate is obviously affected by road...

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Abstract

The invention discloses an electric vehicle sliding energy recovery method. The method comprises the steps of when an electric vehicle meets a preset state, acquiring the vehicle speed and the vehiclespeed change rate of the electric vehicle; obtaining a first mapping relation among the vehicle speed, the vehicle speed change rate and a sliding energy recovery torque; according to the vehicle speed and the vehicle speed change rate, determining a target sliding energy recovery torque from the first mapping relationship; and performing energy recovery control on the electric vehicle accordingto the target sliding energy recovery torque, wherein the first mapping relation meets the condition that when the vehicle speed change rate is greater than 0, the sliding energy recovery torque is reduced along with the increase of the vehicle speed change rate; and when the speed change rate of the vehicle is less than 0, the sliding energy recovery torque is increased along with the increase ofthe absolute value of the speed change rate of the vehicle. By means of the method, the total sliding energy recovery amount under specific road conditions and vehicle conditions can be increased, and corresponding potential safety hazards are eliminated.

Description

technical field [0001] The present application relates to the technical field of new energy vehicles, in particular to an electric vehicle and an electric vehicle coasting energy recovery method and recovery system. Background technique [0002] The coasting energy recovery mode of electric vehicles is usually: when the speed of the electric vehicle is greater than a certain value and the brake and accelerator pedals are not stepped on, and the vehicle allows energy recovery, the vehicle controller VCU sends negative torque to the motor controller MCU, that is, energy To recover the torque, the motor controller MCU controls the motor to generate electricity, which generates a force opposite to the driving direction to decelerate the vehicle. In the current energy recovery scheme, the energy recovery torque is a curve that is only related to the vehicle speed. Under any road condition and any vehicle condition, if the vehicle coasting speed is the same, the determined energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/18
CPCB60L7/18B60L2240/12B60L2240/14B60L2240/423Y02T10/72
Inventor 骆铁平方强胡诗晨何思张敬伟
Owner DONGFENG MOTOR CORP HUBEI
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