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Braking energy recovery control method, device and electric vehicle

A technology of braking energy recovery and control methods, which can be applied to electric vehicles, control drives, electric braking systems, etc., and can solve problems such as poor braking comfort and low energy recovery efficiency

Active Publication Date: 2019-12-17
BEIJING ELECTRIC VEHICLE
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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 braking energy recovery control method, device and electric vehicle, so as to solve the problems of low energy recovery efficiency and slightly poor braking comfort in the existing braking energy recovery technology

Method used

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  • Braking energy recovery control method, device and electric vehicle
  • Braking energy recovery control method, device and electric vehicle
  • Braking energy recovery control method, device and electric vehicle

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Embodiment Construction

[0124] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0125] Such as figure 1 Shown is a flow chart of the braking energy recovery control method according to the embodiment of the present invention. The implementation process of this method will be described in detail below with respect to this figure.

[0126] It should be noted that the present invention is applicable to electric vehicles with a series braking recovery control system.

[0127] Step 101, based on the displacement of the brake pedal, determine the driver's total required braking force;

[0128] Preferably, this step specifically includes:

[0129] Step 1011, obtaining the displacement of the brake pedal;

[0130] Here, the brake pedal displacement of the electric vehicle can be obtained through the pedal displacement sensor.

[0131] ...

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Abstract

The invention provides a braking energy recovery control method and device and an electric automobile. The method includes the steps that on the basis of brake pedal displacement, the total required braking force of a driver is determined; according to capacity limiting conditions of a power system, an electric assistance braking system, the electric automobile and the automobile speed, the largest braking force capable of being provided by a motor is determined; according to different preset corresponding relationships between front axle braking force and rear axle braking force, a judgment threshold value used for braking force distribution is determined; according to the total required braking force of the driver, the largest braking force capable of being provided by the motor and thejudgment threshold value, the required braking force of the motor is determined; and when the required braking force of the motor is larger than zero, the motor is controlled to conduct braking energyrecovery. On the premise that the total required braking force of the driver is not changed, electric braking recovery is conducted to the maximum degree, the purposes that energy recovery efficiencyis high, and the overall braking comfort level of the electric automobile is high are achieved, and driving experience of a user is improved.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a braking energy recovery control method and device and an electric vehicle. Background technique [0002] Braking energy recovery is one of the effective means for new energy vehicles to achieve energy saving and emission reduction. The regenerative braking function of the motor is used to convert the kinetic energy lost by vehicle braking into electrical energy for reuse, which can reduce vehicle energy consumption and extend driving range. The braking energy recovery of new energy vehicles is mostly realized based on the traditional pedal non-decoupling braking system, that is, the parallel braking energy recovery, the braking force of the motor is directly superimposed on the hydraulic braking force, and this implementation method has little change to the original system Or there is no change, but the overall braking comfort is poor, and the energy recovery efficiency is relati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/18B60L15/20
CPCB60L7/18B60L15/2009Y02T10/72
Inventor 王艳静易迪华谢明维刘成祺
Owner BEIJING ELECTRIC VEHICLE
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