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Method and system for controlling regenerative braking of a vehicle

A regenerative braking and vehicle technology, applied in the field of automobile control, can solve problems such as affecting the braking performance of new energy vehicles and users' poor braking experience, meet the requirements of braking experience, save electricity, and extend cruising range Effect

Active Publication Date: 2019-09-10
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when a new energy vehicle brakes, the application of regenerative braking technology will affect the braking performance of the new energy vehicle, which in turn will bring a bad braking experience to the user

Method used

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  • Method and system for controlling regenerative braking of a vehicle
  • Method and system for controlling regenerative braking of a vehicle
  • Method and system for controlling regenerative braking of a vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] An embodiment of the present invention provides a method for controlling regenerative braking of a vehicle. The vehicle includes at least a VCU (Vehicle Control Unit, vehicle control unit) and an MCU (Moter Control Unit, motor control unit). The vehicle may also include a power battery and a motor. The execution subjects of this method are VCU and MCU. Wherein, the vehicle in the present invention is a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, an extended-range electric vehicle, a hybrid vehicle, a fuel cell electric vehicle, a hydrogen engine vehicle, and the like. see figure 1 , the method includes:

[0047] Step 101: The VCU acquires a target regenerative braking intensity, which is a regenerative braking intensity selected by a user from multiple regenerative braking intensities;

[0048] Step 102: the VCU acquires the current vehicle speed of the vehicle and the brake opening of the brake pedal of the vehicle;

[0049] Step 1...

Embodiment 2

[0055] An embodiment of the present invention provides a method for controlling regenerative braking of a vehicle, see diagram 2-1, the vehicle includes at least a VCU and an MCU, and the vehicle may also include a vehicle-mounted display terminal, a power battery, a motor, and a battery control unit, and the battery control unit may be a BMS (Battery Management System, battery management system). The execution subjects of this method are VCU and MCU. Wherein, the vehicle in the present invention is a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, an extended-range electric vehicle, a hybrid vehicle, a fuel cell electric vehicle, a hydrogen engine vehicle, and the like.

[0056] see Figure 2-2 , the method includes:

[0057] Step 201: The VCU acquires a target regenerative braking intensity, which is a regenerative braking intensity selected by a user from multiple regenerative braking intensities;

[0058] This step can be achieved through...

Embodiment 3

[0098] An embodiment of the present invention provides a system for controlling regenerative braking of a vehicle, see image 3 , the system includes VCU301, MCU302 and vehicle display terminal 303:

[0099] The VCU301 is configured to obtain a target regenerative braking intensity, where the target regenerative braking intensity is the regenerative braking intensity selected by the user from multiple regenerative braking intensities;

[0100] VCU301 is also used to obtain the current vehicle speed of the vehicle and the brake opening of the brake pedal of the vehicle;

[0101] VCU301 is also used to determine the recovery coefficient according to the current vehicle speed, brake opening and target regenerative braking intensity;

[0102] VCU301 is also used to determine the actual recyclable power of the power battery according to the remaining power and recovery coefficient of the power battery of the vehicle;

[0103] The VCU301 is also used to determine the torque accordin...

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Abstract

The invention discloses a method and system for controlling regenerative braking of a vehicle, belonging to the field of vehicle control. The method includes: the vehicle control unit VCU acquires the target regenerative braking intensity, and the target regenerative braking intensity is the regenerative braking intensity selected by the user from multiple regenerative braking intensities; the VCU acquires the current vehicle speed of the vehicle, Brake opening; VCU determines the recovery coefficient according to the current vehicle speed, brake opening and target regenerative braking intensity; VCU determines the actual recyclable power of the power battery according to the remaining power of the vehicle’s power battery and the recovery coefficient; VCU determines the actual recyclable power of the power battery according to the actual Recoverable power, determine the torque, send a power generation request to the motor control unit MCU, and the power generation request carries torque; the MCU controls the motor of the vehicle to generate power according to the torque, and charges the power battery. The system includes: VCU and MCU. The present invention satisfies the user's requirements for braking experience to the greatest extent by dividing the regenerative braking intensity levels.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a method and system for controlling regenerative braking of a vehicle. Background technique [0002] The battery on a new energy vehicle is the key to the power system of the vehicle. It can provide power for the new energy vehicle. However, due to material, technology and other factors, the cruising range provided by the battery is limited. For new energy vehicles, especially pure electric vehicles, in order to save electricity and prolong battery life, regenerative braking technology is often used to recover the energy of new energy vehicles during braking, that is, when new energy vehicles brake, the wheels The mechanical energy at the end is converted into electrical energy and stored in the battery of the new energy vehicle. [0003] However, when a new energy vehicle is braking, the application of regenerative braking technology will affect the braking performance of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/24B60L7/10
Inventor 王春丽肖小城
Owner CHERY AUTOMOBILE CO LTD