Active emergency braking method and system for new energy vehicles and new energy vehicles

Abstract

The present invention relates to the field of new energy vehicle braking technology, and specifically to a new energy vehicle active emergency braking method, system and new energy vehicle, the method comprising: when an emergency brake button arranged on a control panel in a vehicle cab is pressed, a brake signal is generated, and the brake signal is sent to a motor controller and a brake controller and a vehicle controller respectively connected to the emergency brake button; while the motor controller controls the motor to set the operating mode to an energy feedback mode according to the brake signal, the brake controller controls the brake to perform emergency braking according to the brake signal. The present application realizes a single-button dual braking function by pressing the emergency brake button, driving the motor operating mode to be converted from a traction mode to a kinetic energy feedback mode for braking, and at the same time the brake system performs emergency braking, with good braking effect, and can greatly reduce the degree of accidents or even avoid accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle braking, and in particular to a new energy vehicle active emergency braking method and system and a new energy vehicle. Background Art

[0002] In recent years, new energy vehicles have developed rapidly in my country and are now widely used, with a trend of gradually replacing traditional fuel vehicles. The driving method of new energy vehicles is basically the same as that of traditional fuel vehicles, but the obvious difference from traditional fuel vehicles is that new energy vehicles accelerate faster when starting from a standstill. When driving in the city, due to the faster acceleration of the vehicle, the requirements for the vehicle's braking system are higher.

[0003] Because new energy vehicles accelerate quickly when driving, many novice or psychologically unstable drivers may mistakenly step on the accelerator instead of the brake in an emergency, allowing the vehicle to move forward or backward rapidly, thus causing serious traffic accidents.

[0004] The emergency braking method of existing new energy vehicles is to use the emergency stop button and brake pedal for braking, but the existing braking method can only be braked by power cutoff or ABS braking system. This braking method is single and cannot achieve timely braking. In an emergency, accidents may not be avoided. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy vehicle active emergency braking method, system and new energy vehicle, and the present invention adopts the following technical means:

[0006] An active emergency braking method for a new energy vehicle, comprising:

[0007] When an emergency brake button disposed on a control panel in a vehicle cab is pressed, a brake signal is generated and sent to a motor controller and a brake controller respectively connected to the emergency brake button;

[0008] While the motor controller controls the motor to set the operation mode to the energy feedback mode according to the brake signal, the brake controller controls the brake to perform emergency braking according to the brake signal.

[0009] In some embodiments of the present application, a new energy vehicle active emergency braking system is also disclosed, including:

[0010] Emergency brake button, motor controller, brake controller;

[0011] The emergency brake button is arranged on the control panel of the vehicle cab and is connected to the motor controller and the brake controller respectively through hard wires. The emergency brake button is used to generate a brake signal when pressed;

[0012] The motor controller is electrically connected to the drive motor, and the brake controller is electrically connected to the controller. The motor controller is used to control the motor to convert the operating mode from the traction mode to the energy feedback mode according to the brake signal. At the same time, the brake controller is used to control the brake for emergency braking according to the brake signal.

[0013] In some embodiments of the present application, a new energy vehicle is also disclosed.

[0014] The beneficial effects of this application are:

[0015] 1. By adding an emergency brake button to the vehicle cab control panel, an active safety measure is added to the vehicle cab;

[0016] 2. In extreme situations such as sudden braking at high speed, loss of control or stepping on the wrong accelerator pedal, the driver only needs to press the emergency brake button set on the control panel of the vehicle's cab, and the engine operation mode can be converted from traction mode to kinetic energy feedback mode for braking. At the same time, the braking system performs emergency braking, realizing a single-button dual braking function with good braking effect, which can greatly reduce the severity of accidents or even avoid accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of an active emergency braking method for a new energy vehicle in an embodiment of the present invention;

[0018] Figure 2 It is a structural schematic diagram of an active emergency braking system for a new energy vehicle in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] like Figure 1 As shown, a new energy vehicle active emergency braking method includes:

[0021] S100, when an emergency brake button disposed on a control panel in a vehicle cab is pressed, a brake signal is generated, and the brake signal is sent to a motor controller and a brake controller respectively connected to the emergency brake button;

[0022] Specifically, the vehicle cab control panel is located on the side of the steering wheel or on the vehicle's central console connected to the steering wheel. An emergency brake button is installed on the side of the steering wheel or on the vehicle's central console connected to the steering wheel. The emergency brake button can be set to a conspicuous and easily visible color such as red. Its installation position can be set to a position that is easy for the driver to press conveniently and quickly when emergency braking is needed.

[0023] S200: While the motor controller controls the motor to set the operation mode to the energy feedback mode according to the braking signal, the brake controller controls the brake to perform emergency braking according to the braking signal.

[0024] Specifically, the motor operation mode is generally traction mode during normal driving, and the energy feedback mode refers to the excess energy released during vehicle deceleration / braking or coasting. Under the premise of ensuring braking efficiency, the drive motor is controlled to operate in a generator state, and a part of the vehicle's mechanical energy (kinetic energy) is converted into other forms of energy (electrical energy) through an energy conversion device connected to the drive shaft and stored in an energy storage device. Therefore, when the motor changes its operation mode to energy feedback mode, a braking effect will immediately occur, and the brake will perform emergency braking to cut off power. Regardless of whether the driver steps on the brake pedal or even on the accelerator pedal, braking can be performed effectively.

[0025] It can be understood that, at the same time, it means that the motor controller and the brake controller are triggered in real time when receiving the brake signal in S100, without waiting for other instructions.

[0026] It can be seen that when emergency braking is needed, the driver presses the emergency brake button set on the control panel in the vehicle's cab, and the engine operation mode can be converted from traction mode to kinetic energy feedback mode for braking. At the same time, the braking system performs emergency braking, realizing a single-button dual braking function and greatly improving the braking effect.

[0027] In some embodiments of the present application, while the motor controller controls the motor to set the operation mode to the energy feedback mode according to the brake signal, the brake controller controls the brake to perform emergency braking according to the brake signal, including:

[0028] The motor controller generates a first motor mode conversion signal according to the brake signal and sends it to the motor connected to the motor controller, while the brake controller generates a first emergency brake signal according to the brake signal and sends it to the brake connected to the brake controller;

[0029] When the motor receives the first motor mode conversion signal, the motor operation mode is converted from the traction mode to the energy feedback mode. At the same time, the brake receives the first emergency braking signal and starts the emergency braking.

[0030] In an embodiment of the present application, the motor controller can generate a first motor mode conversion signal after receiving a brake signal, and the first motor mode conversion signal can control a motor connected to the motor controller, such as a drive motor, to change its operating mode, such as switching the traction mode to the energy feedback mode. In an application, the brake signal can be only a high-level signal, and the motor controller can directly generate a control signal based on the high-level signal, such as the first motor mode conversion signal. The data processing time can be improved, thereby shortening the braking distance of emergency braking.

[0031] In an embodiment of the present application, the brake controller can generate a first emergency brake signal after receiving a brake signal, and the first emergency brake signal can control the brake to cut off the vehicle's running power and perform emergency braking.

[0032] In applications, in some scenarios, for example, a novice driver may perform emergency braking when encountering a situation where braking is required. The generation of a brake signal due to a false touch may cause traffic risks. Therefore, in the embodiments of the present application, in order to prevent the occurrence of false touches, the following implementation methods are also disclosed.

[0033] In some embodiments of the present application, the brake controller generates a first emergency brake signal according to the brake signal, including:

[0034] When the brake controller receives a brake signal, the current vehicle speed is obtained;

[0035] Determine the relationship between the current vehicle speed and a preset threshold;

[0036] If the current vehicle speed is greater than a preset threshold, a first emergency braking signal is generated.

[0037] In an embodiment of the present application, when the brake controller receives a brake signal, it can first obtain the current vehicle speed. Of course, when the emergency brake button is pressed to generate a brake signal, the emergency brake button can actively obtain the current vehicle speed and send it to the brake controller while sending the brake signal.

[0038] Preferably, the brake controller in the present application can actively obtain or collect the current vehicle speed.

[0039] In an embodiment of the present application, the preset threshold value may be calibrated in advance, and a preset threshold value matching the car owner may be generated by summarizing the car owner's personalized driving habits. When leaving the factory, the preset threshold value may be calculated based on the massive data collected.

[0040] After obtaining the current vehicle speed, the current vehicle speed can be compared with the preset threshold. When the current vehicle speed is greater than or equal to the preset threshold, it indicates that emergency braking is required and a first emergency braking signal is generated. Otherwise, no braking signal is generated, which can prevent the driver or the passenger sitting in the co-pilot seat from accidentally touching the signal in actual application scenarios.

[0041] It can be seen that the embodiment of the present application can ensure that the user performs emergency braking without false triggering, thereby avoiding safety hazards caused by operational errors.

[0042] In application, if the hard wire connected to the emergency brake button fails, it may result in the failure to correctly and timely trigger the brake signal. Therefore, in order to ensure the reliability of emergency braking, another implementation method is disclosed in the embodiment of the present application.

[0043] In some embodiments of the present application, when sending a brake signal to an electric controller and a brake controller respectively connected to an emergency brake button, it also includes:

[0044] Sending a brake signal to a vehicle controller connected to an emergency brake button;

[0045] When the vehicle controller receives the brake signal, it generates a CAN brake signal frame;

[0046] The CAN brake signal frame is sent to the motor controller and the brake controller which are respectively electrically connected to the vehicle controller.

[0047] Specifically, the CAN communication bus is a multi-master serial communication bus with the advantages of high bit rate and high resistance to electromagnetic interference, and can detect any abnormalities generated during the communication process.

[0048] In the application, when the vehicle controller receives the brake signal, it generates a CAN brake signal frame and sends it to the motor controller and brake controller. The CAN brake signal frame is a redundant signal of the brake signal. When the hard line connecting the motor controller and the brake controller to the emergency brake button fails or the line is abnormal, the motor controller and the brake controller will not be able to receive the brake signal normally. At this time, the motor controller and the brake controller can also brake by receiving the CAN brake signal frame sent by the vehicle controller.

[0049] In some embodiments of the present application, it also includes:

[0050] When the motor controller receives the CAN brake signal, it determines the current motor operation mode. If the current motor operation mode is the traction mode, it converts the operation mode from the traction mode to the energy feedback mode.

[0051] When the brake controller receives the CAN brake signal, it determines whether the brake has been emergency braked. If it is determined that the brake has not been emergency braked, a second emergency brake signal is generated.

[0052] Specifically, since the CAN brake signal is issued with a delay compared to the vehicle brake signal, when the brake controller and the motor controller fail to brake successfully, a secondary protection effect can be achieved by receiving the CAN brake signal and performing another braking operation.

[0053] In some embodiments of the present application, it also includes:

[0054] After receiving the brake signal, the vehicle controller connected to the emergency brake button generates a throttle pedal cut-off control signal to cut off the physical control of the throttle pedal.

[0055] Specifically, if the driver steps on the wrong pedal when braking suddenly, the accelerator pedal cut-off control signal can be sent to effectively cut off the accelerator power, and the motor driving mode switching and emergency braking can be executed at the same time, effectively improving the braking effect.

[0056] In some embodiments of the present application, it also includes:

[0057] If the vehicle controller connected to the emergency brake button receives the brake signal, it generates and sends an unlocking command to the door lock device, so that the door lock device unlocks the vehicle door lock.

[0058] Specifically, after the vehicle controller collects the emergency braking signal, it can also handle other situations that require emergency handling. For example, it can quickly unlock the door locks from a locked state so that the driver can jump out of the car to escape when an accident is unavoidable, further improving driving safety.

[0059] In some embodiments of the present application, Figure 2 As shown, a new energy vehicle active emergency braking system is also disclosed, including:

[0060] Emergency brake button, motor controller, brake controller;

[0061] The emergency brake button is arranged on the control panel of the vehicle cab and is connected to the motor controller and the brake controller respectively through hard wires. The emergency brake button is used to generate a brake signal when pressed;

[0062] The motor controller is electrically connected to the drive motor, and the brake controller is electrically connected to the controller. The motor controller is used to control the motor to convert the operating mode from the traction mode to the energy feedback mode according to the brake signal. At the same time, the brake controller is used to control the brake for emergency braking according to the brake signal.

[0063] In some embodiments of the present application, it also includes:

[0064] The vehicle controller is connected to the emergency brake button through a hard line, and is connected to the motor controller and the brake controller through a CAN bus, and is used to receive the brake signal and generate a CAN brake signal.

[0065] In some embodiments of the present application, a new energy vehicle is also disclosed, including an active emergency braking system for the new energy vehicle.

[0066] The beneficial effects of this application are:

[0067] 1. By adding an emergency brake button, an active safety measure is added in the vehicle cab;

[0068] 2. In extreme situations such as sudden braking at high speed, loss of control or stepping on the wrong accelerator pedal, the driver only needs to press the emergency brake button, and the engine operation mode can be converted from traction mode to kinetic energy feedback mode for braking. At the same time, the braking system performs emergency braking, realizing a single-button dual braking function with good braking effect, which can greatly reduce the severity of accidents or even avoid accidents.

[0069] The working principle of this embodiment may be: when emergency braking is required, the driver presses the emergency brake button located on the side of the steering wheel or the central console; the emergency brake button sends a braking signal, which is sent to the drive motor controller, the vehicle controller and the brake controller respectively; the drive motor controller controls the drive motor to be set to the energy feedback mode, and at the same time, the brake controller controls the brake to cut off all power and perform braking; when the vehicle controller receives the braking signal, it delays the control of the drive motor to be set to the energy feedback mode and controls the brake to cut off all power and perform braking; in addition, the present application determines the current speed through the brake controller, and does not trigger the braking when the speed does not exceed the preset threshold, thereby avoiding accidental pressing of the operation by the driver or passengers.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A new energy vehicle active emergency braking method, characterized in that: include: When an emergency brake button disposed on a control panel in a vehicle cab is pressed, a brake signal is generated and the brake signal is sent to a motor controller and a brake controller respectively connected to the emergency brake button; While the motor controller controls the motor to set the operation mode to the energy feedback mode according to the brake signal, the brake controller controls the brake to perform emergency braking according to the brake signal, including: The motor controller generates a first motor mode conversion signal according to the brake signal and sends it to the motor connected to the motor controller, while the brake controller generates a first emergency brake signal according to the brake signal and sends it to the brake connected to the brake controller; When the motor receives the first motor mode conversion signal, the motor operation mode is converted from the traction mode to the energy feedback mode. At the same time, the brake receives the first emergency brake signal and starts the emergency brake. The brake controller generates a first emergency brake signal according to the brake signal, comprising: When the brake controller receives the brake signal, obtaining the current vehicle speed; Determine the relationship between the current vehicle speed and a preset threshold; If the current vehicle speed is greater than a preset threshold, a first emergency braking signal is generated; When the brake signal is sent to an electric controller and a brake controller respectively connected to the emergency brake button, the method further comprises: Sending the brake signal to a vehicle controller connected to the emergency brake button; When the vehicle controller receives the brake signal, a CAN brake signal frame is generated; The CAN brake signal frame is sent to the motor controller and the brake controller which are electrically connected to the vehicle controller respectively.

2. The active emergency braking method for a new energy vehicle according to claim 1, characterized in that: The method further comprises: When the motor controller receives the CAN brake signal frame, it determines the current motor operation mode, and if the current motor operation mode is the traction mode, it converts the operation mode from the traction mode to the energy feedback mode; When the brake controller receives the CAN brake signal frame, it determines whether the brake has performed emergency braking. If it is determined that the brake has not performed emergency braking, a second emergency brake signal is generated.

3. A new energy vehicle active emergency braking method according to any one of claims 1-2, characterized in that: The method further comprises: After receiving the brake signal, the vehicle controller connected to the emergency brake button generates a throttle pedal cut-off control signal to cut off the physical control of the throttle pedal.

4. A new energy vehicle active emergency braking method according to any one of claims 1-2, characterized in that: Also includes: After receiving the brake signal, the vehicle controller connected to the emergency brake button generates and sends an unlocking instruction to the door lock device, so that the door lock device unlocks the vehicle door lock.

5. An active emergency braking system for new energy vehicles, characterized in that: A new energy vehicle active emergency braking method applied to any one of claims 1 to 4, comprising: Emergency brake button, motor controller, brake controller; Wherein, the emergency brake button is arranged on the control panel of the vehicle cab, and is respectively connected to the motor controller and the brake controller through hard wires, and the emergency brake button is used to generate a brake signal when being pressed; The motor controller is electrically connected to the drive motor, and the brake controller is electrically connected to the controller. The motor controller is used to control the motor to convert the operating mode from the traction mode to the energy feedback mode according to the brake signal. At the same time, the brake controller is used to control the brake to perform emergency braking according to the brake signal.

6. The active emergency braking system for new energy vehicles according to claim 5, characterized in that: Also includes: The vehicle controller is connected to the emergency brake button through a hard line, and is respectively connected to the motor controller and the brake controller through a CAN bus. The vehicle controller is used to receive a brake signal and generate a CAN brake signal frame.

7. A new energy vehicle, characterized in that: Including an active emergency braking system for new energy vehicles as described in claim 5 or 6.

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