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Braking energy recovery control method and device of rear wheel drive pure electric vehicle

A vehicle braking and energy recovery technology, applied in control devices, electric vehicles, electric braking systems, etc.

Active Publication Date: 2019-01-29
SHAANXI AUTOMOBILE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned prior art also starts from the perspective of braking energy recovery to achieve the effect of improving the mileage of pure electric vehicles, the recovery method of regenerative braking in the prior art does not recover the energy lost in the braking process to the greatest extent.

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  • Braking energy recovery control method and device of rear wheel drive pure electric vehicle
  • Braking energy recovery control method and device of rear wheel drive pure electric vehicle
  • Braking energy recovery control method and device of rear wheel drive pure electric vehicle

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Embodiment Construction

[0055] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0056] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientations or positional relationships indicated by "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the referred device or element must have a specific orientation, are constructed and operate in a particular orientation and therefore are not to be construed as limiting the invention.

[0057] In addition, the terms "fir...

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Abstract

The invention relates to the technical field of electric vehicles, specifically to a braking energy recovery control method and device of a rear wheel drive pure electric vehicle. The braking energy recovery control method of the rear wheel drive pure electric vehicle comprises the steps of a braking energy recovery mode judging step, a maximum regenerative braking force calculating step, a demandbraking force calculating step, a braking force distributing step and an anti-lock judging step; in the automobile braking process, distribution of a mechanical braking force and a regenerative braking force is controlled; on the basis of guaranteeing braking safety and braking efficiency, a regenerative braking force distribution coefficient is furthest increased; wasted energy in the braking process is sufficiently recovered by using the feeding capacity of a motor to charge a power battery; the braking energy recovery efficiency is enhanced; the braking energy loss is reduced; and the running range of the vehicle is optimized.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a braking energy recovery control method and device for rear-wheel drive pure electric vehicles. Background technique [0002] Braking energy recovery is an important means to improve the energy utilization efficiency of electric vehicles. The motor has two working states: the driving motor state and the generating motor state. When the motor is running in the power generation state, it can generate braking torque to decelerate the car, and at the same time convert part of the braking energy of the car into electrical energy to charge the power battery, thereby increasing the driving range of the car. Relevant studies have shown that in urban working conditions, if the braking energy of a car can be effectively recovered, its cruising range will be increased by 10%-13%. Braking energy recovery technology has a good effect on reducing energy consumption and reducing bra...

Claims

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Application Information

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IPC IPC(8): B60L7/26
CPCB60L7/26B60L2240/421B60L2240/12
Inventor 史强张蕾李静李司光
Owner SHAANXI AUTOMOBILE GROUP
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