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Energy recovery control method and device of battery electric vehicle and battery electric vehicle

A pure electric vehicle, energy recovery technology, applied in the direction of electric vehicles, control devices, control drives, etc., can solve the problems of poor driving comfort, no energy recovery, energy recovery can not be fully utilized, etc., to achieve the effect of good driving experience

Active Publication Date: 2017-01-25
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the first mode, when the pure electric vehicle is at high speed and the accelerator pedal opening is small, energy recovery is not performed, and the energy of the pure electric vehicle is consumed to overcome the sliding resistance, resulting in of energy cannot be fully utilized and recovered
Although the second mode recovers part of the energy, the driver cannot control the recovery intensity, energy recovery cut-in and withdrawal time, and the driver cannot freely adjust the energy recovery according to his own subjective feelings. Smooth, poor driving comfort

Method used

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  • Energy recovery control method and device of battery electric vehicle and battery electric vehicle
  • Energy recovery control method and device of battery electric vehicle and battery electric vehicle
  • Energy recovery control method and device of battery electric vehicle and battery electric vehicle

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Embodiment 1

[0047] According to an aspect of the embodiments of the present invention, an energy recovery control method for pure electric vehicles is provided, such as figure 1 As shown, the method includes:

[0048] Step S101: judging whether the pure electric vehicle enters the coasting condition;

[0049] Wherein, step S101 specifically includes: obtaining the gear signal, brake pedal opening, and driving speed of the pure electric vehicle; when the gear signal is a forward gear and the brake pedal opening is 0, And when the driving speed is greater than 0, it is determined that the pure electric vehicle enters a coasting condition.

[0050] Step S102: When the judgment result is yes, obtain the driving speed of the pure electric vehicle and the first opening degree of the accelerator pedal, and determine the first speed interval to which the driving speed belongs, wherein the driving speed is divided into multiple a continuous and non-overlapping speed range;

[0051] Step S103: D...

Embodiment 2

[0072] According to another aspect of the embodiment of the present invention, an energy recovery control device 500 for a pure electric vehicle is also provided, such as Figure 5 shown, including:

[0073] Judgment module 501, for judging whether the pure electric vehicle enters the coasting condition;

[0074] The first acquisition module 502 is configured to acquire the driving speed of the pure electric vehicle and the first opening degree of the accelerator pedal when the determination result of the determination module 501 is yes, and determine the first speed range to which the driving speed belongs, Among them, the driving speed is divided into a plurality of continuous and non-overlapping speed intervals in advance;

[0075] The second acquiring module 503 is configured to determine the first motor torque curve corresponding to the first speed range according to the preset correspondence between the speed range and the motor torque curve, and according to the first ...

Embodiment 3

[0089] According to another aspect of the embodiment of the present invention, a pure electric vehicle is also provided, including a vehicle controller, a power supply, a motor, a motor controller, a brake pedal, an accelerator pedal, and especially the pure electric vehicle as described above. Energy recuperation control device for automobiles.

[0090] The pure electric vehicle in the embodiment of the present invention can obtain the motor torque value according to the 3-stage motor torque curve corresponding to the opening of the accelerator pedal and the torque of the motor in the coasting condition. When the pure electric vehicle is at high speed and the accelerator pedal is open In low-degree sliding conditions, while energy recovery is performed, it also meets the driver's demand for free gliding of pure electric vehicles, and avoids the vehicle's uneven driving state caused by the instantaneous switching of positive and negative torques of the motor.

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Abstract

The invention provides an energy recovery control method and device of a battery electric vehicle and the battery electric vehicle. The method comprises the steps of judging whether the battery electric vehicle is in a sliding condition; if the battery electric vehicle is in the sliding condition, obtaining a running speed of the battery electric vehicle and first opening of an accelerator pedal, and determining a first speed range to which the running speed belongs; determining a first motor torque curve corresponding to the first speed range according to corresponding relation between a preset speed range and the motor torque curve, and obtaining a torque value corresponding to the first opening from the first motor torque curve according to the first opening of the accelerator pedal; controlling the motor output state of the battery electric vehicle according to the torque value, and performing energy recovery. According to the energy recovery control method, the energy recovery can be performed according to the opening of the accelerator pedal when the battery electric vehicle is in the sliding condition, the defect that sliding energy recovery cannot be controlled by utilizing the accelerator pedal in the prior art is overcome, and the driving feeling of a driver is improved.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicles, in particular to an energy recovery control method and device for pure electric vehicles and the pure electric vehicle. Background technique [0002] At present, there are two modes of energy recovery for pure electric vehicles under coasting conditions. One mode is to perform energy recovery only when it is determined that the accelerator pedal is completely released and the brake pedal is stepped on (invention patent: CN201220265436.X, a parallel type braking energy recovery system); the second mode is to perform fixed-intensity energy recovery within the set energy recovery vehicle speed range after the accelerator pedal is completely released. [0003] However, in the first mode, when the pure electric vehicle is at high speed and the accelerator pedal opening is small, energy recovery is not performed, and the energy of the pure electric vehicle is consumed to overcome the sli...

Claims

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Application Information

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IPC IPC(8): B60L7/10B60L15/20
CPCB60L7/10B60L15/2009B60L2240/12B60L2240/423B60L2250/26B60L2260/24Y02T10/72
Inventor 王立群周建鹏张海涛马博
Owner BEIJING ELECTRIC VEHICLE
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