阅读说明：本技术 一种电动汽车制动能量回收控制系统及方法 (Braking energy recovery control system and method for electric automobile ) 是由 姚雪平 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种电动汽车制动能量回收控制系统及方法。本发明涉及的一种电动汽车制动能量回收控制系统,其特征在于,包括：制动踏板单元、VCU整车控制单元、EBooste电控制动单元；所述制动踏板单元,用于接收驾驶员的制动意图；所述EBooste电控制动单元,包括踏板行程传感器、控制单元；所述踏板行程传感器用于根据驾驶员的制动意图探测制动踏板的位移,并将探测到的位移信号发送至控制单元；所述控制单元用于将接收到的位移信号驱动电机产生再生制动的能量；所述VCU整车控制单元,用于根据驾驶员的制动意图控制所述控制单元驱动电机产生再生制动的能量。(The invention discloses a braking energy recovery control system and method for an electric automobile. The invention relates to an electric automobile braking energy recovery control system, which is characterized by comprising the following components: the brake pedal unit, the VCU whole vehicle control unit and the EBooste electric control brake unit; the brake pedal unit is used for receiving the braking intention of a driver; the EBooste electric control brake unit comprises a pedal stroke sensor and a control unit; the pedal travel sensor is used for detecting the displacement of the brake pedal according to the braking intention of the driver and sending a detected displacement signal to the control unit; the control unit is used for driving the motor to generate regenerative braking energy by the received displacement signal; and the VCU vehicle control unit is used for controlling the control unit to drive the motor to generate regenerative braking energy according to the braking intention of a driver.)

1. The utility model provides an electric automobile braking energy recuperation control system which characterized in that includes: the brake pedal unit, the VCU whole vehicle control unit and the EBooste electric control brake unit;

the brake pedal unit is used for receiving the braking intention of a driver;

the EBooste electric control brake unit comprises a pedal stroke sensor and a control unit; the pedal travel sensor is used for detecting the displacement of the brake pedal according to the braking intention of the driver and sending a detected displacement signal to the control unit; the control unit is used for driving the motor to generate regenerative braking energy by the received displacement signal;

and the VCU vehicle control unit is used for controlling the control unit to drive the motor to generate regenerative braking energy according to the braking intention of a driver.

2. The braking energy recovery control system of an electric vehicle of claim 1, wherein the VCU vehicle control unit further comprises a braking torque for generating the regenerative braking energy to form the braking.

3. The electric vehicle braking energy recovery control system of claim 1, wherein if the brake pedal unit does not receive the driver's braking intention, the energy of regenerative braking is recovered by the VCU vehicle control unit.

4. The electric vehicle braking energy recovery control system of claim 2, further comprising a decoupling electronically controlled hydraulic braking unit configured to complete the braking operation when the braking of the regenerative braking energy does not meet the driver's braking intent.

5. The electric vehicle braking energy recovery control system of claim 3, wherein the regenerative braking energy comprises sliding regenerative energy and braking regenerative energy.

6. A braking energy recovery control method for an electric automobile is characterized by comprising the following steps:

s1, detecting the displacement of a brake pedal through a pedal travel sensor according to the received braking intention, and sending a detected displacement signal to a control unit;

and S2, driving a motor to generate regenerative braking energy by using the displacement signal received by the control unit.

7. The electric vehicle braking energy recovery control method of claim 6, wherein after the step S2, the method further comprises:

and S3, generating a braking torque by the generated regenerative braking energy through a VCU (vehicle control unit) to form braking.

8. The electric vehicle braking energy recovery control method of claim 7, wherein the step S1 further includes:

if the braking intention is not received, the energy of regenerative braking is recovered through the VCU whole vehicle control unit.

9. The electric vehicle braking energy recovery control method of claim 7, wherein after the step S3, the method further comprises:

and S4, when the braking of the regenerative braking energy does not meet the braking intention of the driver, completing the braking operation through the decoupling electric control hydraulic braking unit.

10. The electric vehicle braking energy recovery control method of claim 8, wherein the regenerative braking energy comprises sliding regenerative energy and braking regenerative energy.

Technical Field

The invention relates to the field of automobile braking, in particular to a braking energy recovery control system and method for an electric automobile.

Background

With the development of society, new energy automobiles are increasingly widely applied. The new energy is a concept generated to distinguish the conventional fossil energy. At present, new energy vehicles mainly include pure electric vehicles, hybrid plug-in vehicles, fuel cells and the like. With the popularization of concepts and the support of policies, new energy vehicles have become an immense amount of force in the automobile market. Among them, the research of energy recovery systems is one of the core technologies thereof. The energy recovery system is used for converting part of kinetic energy of the automobile into electric energy when the automobile is decelerated or braked, and the electric energy is stored and then is reused for driving the automobile to run.

The energy recovery system is an auxiliary device originating from the F1 event. The principle is that the energy which is wasted in braking is collected and stored and released in due time. The energy recovery system is an energy recovery system only equipped in top-grade luxury vehicles, and is particularly suitable for new energy vehicle types except fuel cells.

As is well known, the most important advantage of a new energy vehicle is that electric energy replaces the traditional internal energy. However, the largest problem encountered in the actual use process of the new energy vehicle is that the new energy vehicle is charged. Charging cannot be as fast and convenient as refueling, so that the enhancement of the utilization rate of electric energy is an important auxiliary technology. The mechanical energy that "overflows" converts the electric energy into, though can't solve the problem of charging from the root, nevertheless because the utilization ratio has improved a lot, can reduce the number of times of charging to a certain extent, still very practical, especially on mixing the motor vehicle type, the effect is more obvious.

However, the existing automobiles do not make good use of energy recovery when braking, and especially do not make good use of kinetic energy loss of the automobiles when braking. The kinetic energy is converted into heat energy in the brake and dissipated to the atmosphere. In the daily running process of a large number of automobiles, particularly in the running process of a city with crowded traffic, the automobiles frequently start, accelerate, brake and decelerate to generate huge brake energy dissipation, and the efficiency of the motor is greatly reduced. The design of the braking system is different from that of the traditional vehicle, and the energy recovery strategy of the braking system needs to be highlighted, so that the kinetic energy loss of the vehicle can be better utilized.

Disclosure of Invention

The invention aims to provide a braking energy recovery control system and method for an electric automobile, aiming at the defects of the prior art, the braking energy recovery control system and method for the electric automobile adopt an EBooste system to recover the braking energy of the automobile, and have the characteristics of energy conservation, environmental protection and safety.

In order to achieve the purpose, the invention adopts the following technical scheme:

an electric vehicle braking energy recovery control system, comprising: the brake pedal unit, the VCU whole vehicle control unit and the EBooste electric control brake unit;

the brake pedal unit is used for receiving the braking intention of a driver;

the EBooste electric control brake unit comprises a pedal stroke sensor and a control unit; the pedal travel sensor is used for detecting the displacement of the brake pedal according to the braking intention of the driver and sending a detected displacement signal to the control unit; the control unit is used for driving the motor to generate regenerative braking energy by the received displacement signal;

and the VCU vehicle control unit is used for controlling the control unit to drive the motor to generate regenerative braking energy according to the braking intention of a driver.

Furthermore, the VCU vehicle control unit also generates a braking torque from the regenerative braking energy to form braking.

Furthermore, if the brake pedal unit does not receive the braking intention of the driver, the energy of regenerative braking is recovered through the VCU whole vehicle control unit.

The system further comprises a decoupling electronic control hydraulic brake unit which is used for completing the braking operation when the braking of the regenerative braking energy does not meet the braking intention of the driver.

Further, the regenerative braking energy includes sliding regenerative energy and braking regenerative energy.

Correspondingly, the braking energy recovery control method for the electric automobile is also provided, and comprises the following steps:

s1, detecting the displacement of a brake pedal through a pedal travel sensor according to the received braking intention, and sending a detected displacement signal to a control unit;

and S2, driving a motor to generate regenerative braking energy by using the displacement signal received by the control unit.

Further, the step S2 is followed by:

and S3, generating a braking torque by the generated regenerative braking energy through a VCU (vehicle control unit) to form braking.

Further, the step S1 further includes:

if the braking intention is not received, the energy of regenerative braking is recovered through the VCU whole vehicle control unit.

Further, the step S3 is followed by:

and S4, when the braking of the regenerative braking energy does not meet the braking intention of the driver, completing the braking operation through the decoupling electric control hydraulic braking unit.

Further, the regenerative braking energy includes sliding regenerative energy and braking regenerative energy.

Compared with the prior art, the invention adopts the EBooste system to recover the energy by detecting the braking intention of the driver; the invention recovers the braking energy of the vehicle under the condition of ensuring the safe running of the vehicle, and has the characteristics of energy conservation, environmental protection and safety.

Drawings

FIG. 1 is a structural diagram of a braking energy recovery control system of an electric vehicle according to a first embodiment;

fig. 2 is a flowchart of a braking energy recovery control method for an electric vehicle according to a second embodiment.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

The invention aims to provide a braking energy recovery control system and method for an electric automobile, aiming at the defects of the prior art.