Motorcycle and control method thereof

Abstract

The invention provides a motorcycle and a control method thereof. The motorcycle comprises a motorcycle body; the wheels comprise a front wheel and a rear wheel; the suspension system comprises a front suspension and a rear suspension, the front wheel is connected to the vehicle body through the front suspension, and the rear wheel is connected to the vehicle body through the rear suspension; the power system is arranged on the motorcycle body and used for providing power for the motorcycle; the energy system is electrically connected with the power system; the high-voltage loop is communicated with the energy system; the high-voltage loop protection system is arranged in the high-voltage loop; the high-voltage loop protection system comprises a high-voltage loop protection module, a sensing unit and a control module, the control module receives the longitudinal acceleration and the current vehicle speed output by the sensing unit, and when the longitudinal acceleration is larger than or equal to the acceleration threshold value and the current vehicle speed is larger than the preset speed, the high-voltage loop protection module is controlled to cut off the high-voltage loop. The safety of the motorcycle can be improved.

Description

Technical Field

[0001] The present application relates to the field of driving safety, and in particular to a motorcycle and a control method thereof. Background Art

[0002] With the widespread use of electric motorcycles, safety issues have become a focus of public concern. Electric motorcycles use motor controllers to convert the energy stored in the power battery into the power required to drive the motor, controlling the motorcycle's movement. Depending on the specific positioning and functional requirements of the electric motorcycle, the power battery voltage can reach hundreds of volts, far exceeding the safe voltage level for the human body.

[0003] Existing collision safety measures for electric motorcycles primarily involve wearing protective equipment to reduce collision damage, improving the vehicle's structural design to mitigate collision impact, or deploying collision warning devices to intervene in the driver's seat. However, none of these approaches adequately consider the dangers posed by the motorcycle's high-voltage components during an accidental collision. Therefore, mitigating the risks posed by these components and ensuring the safety of riders and passengers during an accidental collision has become a pressing technical challenge for those skilled in the art. Summary of the Invention

[0004] The embodiments of the present application disclose a motorcycle and a control method thereof, which can improve the safety of the motorcycle during an accidental collision.

[0005] The present application provides a motorcycle, comprising: a body; wheels, comprising a front wheel and a rear wheel; a suspension system, comprising a front suspension and a rear suspension, the front wheel being connected to the body via the front suspension, and the rear wheel being connected to the body via the rear suspension; a power system, arranged on the body, for providing power for the motorcycle; an energy system, the energy system being electrically connected to the power system; a high-voltage circuit, the high-voltage circuit being connected to the energy system; a high-voltage circuit protection system, arranged in the high-voltage circuit; the high-voltage circuit protection system further comprising a high-voltage circuit protection module, a sensing unit and a control module, the control module being connected to the sensing unit; the high-voltage circuit protection module being connected to the control module, the high-voltage circuit protection module being configured to control the disconnection and connection of the high-voltage circuit; the control module receiving the longitudinal acceleration and the current vehicle speed output by the sensing unit, and controlling the high-voltage circuit protection module to disconnect the high-voltage circuit when the longitudinal acceleration is greater than or equal to an acceleration threshold and the current vehicle speed is greater than a preset speed.

[0006] In some optional embodiments of the present application, the control module is also used to determine whether the high-voltage circuit is faulty when the longitudinal acceleration is less than the acceleration threshold and the current vehicle speed is less than the preset speed, and to control the high-voltage circuit protection module to cut off the high-voltage circuit when it is determined that the high-voltage circuit is faulty.

[0007] In some optional embodiments of the present application, when the control module determines that the longitudinal acceleration is less than the acceleration threshold, and the current vehicle speed is less than the preset speed, and determines that there is no fault in the high-voltage circuit, the motorcycle is controlled to maintain a normal driving state.

[0008] In some optional embodiments of the present application, the control module determines whether a fault occurs in the high-voltage circuit by performing a fault detection analysis on the high-voltage circuit, wherein the fault detection analysis includes insulation fault detection, high-voltage interlock fault detection, high-voltage circuit interruption detection, and high-voltage component function failure detection.

[0009] In some optional embodiments of the present application, the control module further controls the motorcycle to maintain a normal driving state when it is determined that the longitudinal acceleration is less than the acceleration threshold.

[0010] In some optional embodiments of the present application, the high-voltage circuit protection system also includes a data upload module and an information alarm module, and the data upload module and the information alarm module are connected to the control module. The data upload module is used to remotely send the received determination result and detection information to the mobile terminal device via wireless communication after the control module determines that the motorcycle has a collision accident and cuts off the high-voltage circuit; the information alarm module is used to send corresponding alarm information when the control module determines that the high-voltage circuit has a fault.

[0011] In some optional embodiments of the present application, controlling the high-voltage circuit protection module to cut off the high-voltage circuit includes: the control module sending a control signal to the contactor in the high-voltage circuit protection module to control the contactor to disconnect and cut off the high-voltage circuit; or the control module sending an execution instruction to the smart fuse in the high-voltage circuit protection module to control the smart fuse to cut off the high-voltage circuit.

[0012] The present application also provides a control method for a motorcycle, which is applied to a motorcycle, wherein the motorcycle includes a high-voltage circuit protection system, and the high-voltage circuit protection system includes a high-voltage circuit protection module, a sensing unit and a control module; the method includes: the sensing unit collects the longitudinal acceleration and current vehicle speed of the motorcycle, and sends the longitudinal acceleration and current vehicle speed to the control module; when the control module determines that the longitudinal acceleration is greater than or equal to an acceleration threshold and the current vehicle speed is greater than a preset speed, the high-voltage circuit protection module controls the high-voltage circuit protection module to cut off the high-voltage circuit in the motorcycle.

[0013] In some optional embodiments of the present application, the method further includes: when the longitudinal acceleration is less than the acceleration threshold and the current vehicle speed is less than the preset speed, determining whether a high-voltage circuit fails, and when it is determined that a high-voltage circuit fails, controlling the high-voltage circuit protection module to cut off the high-voltage circuit.

[0014] In some optional embodiments of the present application, the method further includes: determining whether a fault occurs in the high-voltage circuit by performing fault detection analysis on the high-voltage circuit, wherein the fault detection analysis includes insulation fault detection, high-voltage interlock fault detection, high-voltage circuit interruption detection, and high-voltage component function failure detection.

[0015] In an embodiment of the present application, when it is determined that a serious collision accident occurs in a motorcycle, the high-voltage circuit protection system can be controlled to cut off the high-voltage circuit, thereby reducing the risk of electric shock to personnel and avoiding the risk of fire caused by a short circuit in the high-voltage circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a motorcycle provided in an embodiment of the present application.

[0017] Figure 2 A schematic diagram of the functional modules of a motorcycle provided in an embodiment of the present application.

[0018] Figure 3 This is a structural diagram of a high-voltage circuit protection module provided in an embodiment of the present application.

[0019] Figure 4 This is a flowchart of a motorcycle control method provided in an embodiment of the present application.

[0020] Figure 5 This is a flowchart of another motorcycle control method provided in an embodiment of the present application.

[0021] Figure 6 This is a flowchart of another motorcycle control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] To facilitate understanding, some illustrations of concepts related to the embodiments of the present application are given for reference.

[0023] It should be noted that in this application, "at least one" means one or more, and "more than one" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0024] The embodiments of the present application provide a motorcycle and a control method for the motorcycle, which can cut off the high-voltage circuit in the event of a collision of the motorcycle 10. To better understand the motorcycle and the control method for the motorcycle provided in the embodiments of the present application, the structure of the motorcycle 10 of the present application is first described below.

[0025] Figure 1 This is a schematic structural diagram of a motorcycle 10 provided in an embodiment of the present application. Figure 1 As shown, the motorcycle 10 provided in an embodiment of the present application includes a body 101, wheels 102, a suspension system 103, a power system 104, an energy system 105, a high-voltage circuit 106, and a control system 107. Wheels 102 include a front wheel 1021 and a rear wheel 1022. Suspension system 103 includes a front suspension 1031 and a rear suspension 1032. Front wheel 1021 is connected to body 101 via front suspension 1031, and rear wheel 1022 is connected to body 101 via rear suspension 1032. Power system 104 is disposed on body 101 and is used to provide power to motorcycle 10. At least one of front wheel 1021 and rear wheel 1022 is connected to power system 104. Power system 104 is used to provide power to motorcycle 10. Energy system 105 is disposed on body 101 and is used to provide energy to motorcycle 10. Energy system 105 includes at least a battery pack 1051. The high-voltage circuit 106 is connected to the energy system 105 and is used to provide the motorcycle 10 with power distribution, charging function, circuit protection, electromagnetic compatibility and safety monitoring. The control system 107 is set on the vehicle body 101 and is used to control the operation of the motorcycle 10.

[0026] In one embodiment of the present application, the motorcycle 10 further includes an onboard device, which may be a charging device, a dashboard, a motor control unit (MCU), a battery management system (BMS), or the like.

[0027] The charging device is a charger in the motorcycle 10, or the charging device may be internal or external.

[0028] Instruments may include a speedometer, tachometer, oil pressure gauge, water temperature gauge, fuel gauge, charge meter, and a voltage regulator. The voltage regulator stabilizes the voltage of the instrument power supply, suppressing fluctuations to ensure instrument accuracy. Most instrument displays are based on various sensors within motorcycle 10. These sensors change their resistance based on changes in the status of the monitored object, which is then displayed on the instrument.

[0029] The motor controller is the core controller that controls the start, operation, forward and backward movement, speed and stop of the motor in the motorcycle 10. The motor controller obtains the vehicle requirements of the motorcycle 10 from the vehicle controller and obtains electrical energy from the battery pack 1051 in the energy system 105. After modulation by the inverter built into the motor controller, the motor controller obtains the current and voltage required to control the motor, and provides the obtained current and voltage to the motor, so that the motor speed and torque meet the vehicle requirements.

[0030] A BMS is a device used to monitor and protect the battery pack 1051. Its primary functions include monitoring the status of the battery pack 1051, preventing overcharging and over-discharging of the battery pack 1051, and evaluating the performance of the battery pack 1051. For example, the BMS ensures that the battery pack 1051 operates within a safe operating range by monitoring key parameters such as the voltage, current, and temperature of the battery pack 1051. The BMS controls the charging and discharging processes to prevent overcharging or over-discharging of the battery pack 1051, thereby extending the service life of the battery pack 1051. The BMS can assess the health of the battery pack 1051 and, using the collected data, predict the remaining life and performance of the battery pack 1051.

[0031] The motorcycle 10 mentioned in the embodiment of the present application can be various types of electric motorcycles.

[0032] The schematic Figure 1 This is merely an example of the motorcycle 10 and does not constitute a limitation on the motorcycle 10 . The motorcycle 10 may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the motorcycle 10 may also include an engine, a power controller, etc.

[0033] Please refer to Figure 2The motorcycle 10 includes a high-voltage circuit protection system 100, which includes a sensing unit 108, a high-voltage circuit protection module 109, a control module 110, a data upload module 111, and an information alarm module 112. The control module 110 is in communication with the sensing unit 108, the high-voltage circuit protection module 109, the data upload module 111, and the information alarm module 112.

[0034] In the embodiment of the present application, the sensing unit 108 detects the current speed, longitudinal acceleration, tilt angle and other detection information of the motorcycle 10, and sends the detection information to the control module 110. The control module 110 determines the collision condition of the motorcycle 10 based on the detection information. The current sensor in the sensing unit 108 can detect the current current value in the high-voltage circuit 106 and send the current current value to the control module 110. The control module 110 determines whether the high-voltage circuit 106 is overloaded or short-circuited based on the current current value. The temperature information of the battery pack 1051 can be detected by the temperature sensor in the sensing unit 108, and the temperature information is sent to the control module 110. The control module 110 determines whether the motorcycle 10 is experiencing thermal runaway based on the temperature information.

[0035] In the embodiment of the present application, the high voltage circuit protection module 109 in the high voltage circuit protection system 100 controls the disconnection and connection of the high voltage circuit 106 in the motorcycle 10, thereby achieving electrical safety and normal function of the motorcycle 10. Figure 3 The high-voltage circuit protection module 109 can be applied to the high-voltage circuit 106 and can include a main positive contactor 1, a pre-charge contactor 2, a pre-charge resistor 3, an intelligent fuse 4, a battery module 5, a current sensor 6, and a main negative contactor 7. The pre-charge contactor 2 and the pre-charge resistor 3 are connected in series and then in parallel with the main positive contactor 1. They are then connected to the battery module 5 via the intelligent fuse 4. The battery module 5 is connected to the main negative contactor 7 via the current sensor 6, forming a high-voltage protection circuit.

[0036] In the embodiment of the present application, the contactors (such as the main positive contactor 1, the pre-charge contactor 2 and the main negative contactor 7) are used to control the on and off of the high-voltage circuit 106, and the high-voltage circuit 106 is preferentially disconnected at low current or below. The smart fuse 4 can receive the execution instruction sent by the control module 110 to actively cut off the thermal fuse to cut off the high-voltage circuit 106. When a high current is received to confirm that the high-voltage circuit 106 is overloaded or short-circuited, the thermal fuse in the smart fuse 4 is thermally melted to achieve passive cutting of the high-voltage circuit 106. It should be noted that the way in which the smart fuse 4 actively cuts off the circuit can be, but is not limited to, gunpowder detonation, thereby generating a large pressure inside the smart fuse 4 to drive the mechanical mechanism to cut off the thermal fuse.

[0037] In an embodiment of the present application, the data upload module 111 is configured to remotely transmit the received determination result and detection information, including data, to a mobile terminal device via wireless communication after the control module 110 determines that the motorcycle 10 has been involved in a collision and disconnects the high-voltage circuit 106. The mobile terminal device processes the uploaded data and transmits it to a remote communication device, and as needed, sends an accident report to an emergency contact, medical rescue system, or traffic management system. In one embodiment, the data upload module 111 is further configured to transmit the determination result and detection information, including data, to an emergency contact, medical rescue system, or traffic management system after the control module 110 determines that the motorcycle 10 has been involved in a collision. In an embodiment of the present application, the information alarm module 112 is configured to transmit a corresponding alarm message when the control module 110 determines that the high-voltage circuit 106 has failed. This alarm message includes, but is not limited to, text and / or symbol prompts, warning light prompts, sound prompts, and tactile prompts. Specifically, the information alarm module 112 can output prompt text and / or prompt symbols to the display of the motorcycle 10 (such as the instrument cluster), or output flashing light alarm information by activating the warning lights of the motorcycle 10, or output sound prompts through the speakers, or output tactile prompts by vibrating the steering wheel or handlebars.

[0038] In an embodiment of the present application, the control module 110 receives a current current value, longitudinal acceleration, current vehicle speed, and / or current temperature value, determines whether analysis needs to be performed under the current operating condition based on the received current current value, longitudinal acceleration, current vehicle speed, and / or current temperature value, and issues an execution instruction. Specifically, when the control module 110 determines that the motorcycle 10 has crashed based on the detection information sent by the sensing unit 108, the control module 110 sends an execution instruction to the smart fuse 4, controlling the smart fuse 4 to perform active protection and disconnect the high-voltage circuit 106. When the control module 110 determines that the motorcycle 10 has experienced thermal runaway based on the temperature information sent by the sensing unit 108, the control module 110 sends an execution instruction to the smart fuse 4, controlling the smart fuse 4 to perform active protection and disconnect the high-voltage circuit 106. When the control module 110 determines that the high-voltage circuit 106 is overloaded or short-circuited based on the current current value sent by the sensing unit 108, the control module 110 sends a control signal to the contactor to control the contactor to open, disconnecting the high-voltage circuit 106.

[0039] After determining that the motorcycle 10 has crashed, the control module 110 may also perform fault detection and analysis on the high-voltage circuit 106. This fault detection and analysis includes, but is not limited to, insulation fault detection, high-voltage interlock fault detection, high-voltage circuit interruption detection, and detection of high-voltage component functional failure or serious faults. This insulation fault can be determined using an insulation resistance measurement unit, which can be a standalone unit or integrated into the battery management system. Specifically, the control module 110 performs real-time or periodic insulation resistance testing of the high-voltage positive or negative electrode in the high-voltage circuit 106 relative to the electrical platform. When the vehicle insulation resistance Ri is less than a preset threshold (Ri is used as a calibration quantity, such as 500Ω / V), a fault message is reported. The electrical platform refers to the reference potential of the high-voltage circuit 106, the opposing electrodes used to measure insulation resistance. During the insulation resistance test, the high-voltage positive or negative electrode is compared to the preset electrical platform to determine its insulation performance. Specifically, if the control module 110 detects that the insulation resistance is less than a predetermined threshold, an insulation fault is determined to exist. If the control module 110 detects that the insulation resistance is greater than or equal to the predetermined threshold, an insulation fault is determined not to exist.

[0040] The high-voltage interlock fault detection is used to monitor the status of all electrical connection units (such as connector plugs) of the high-voltage circuit 106 through the control module 110. For example, the connection plugs of the high-voltage circuit 106 are connected in series through one or more wires, and the connection status of the high-voltage components in the high-voltage circuit 106 is checked by using a low-voltage signal to detect the electrical connection integrity and continuity of the high-voltage circuit 106. When the connection plug of any conductive high-voltage component of the high-voltage circuit 106 is disconnected, the low-voltage signal contact will be triggered to disconnect at the same time. If the low-voltage detection information in the high-voltage circuit 106 is detected to be interrupted, it means that the electrical connection of the high-voltage circuit 106 is facing an abnormality and a high-voltage interlock fault occurs.

[0041] A sensor monitors the current or voltage on the high-voltage wire to determine whether a high-voltage circuit interruption has occurred in the high-voltage circuit 106. Specifically, when the sensor detects that the current or voltage on the high-voltage wire is zero, a high-voltage circuit interruption is determined to have occurred in the high-voltage circuit 106. When the sensor detects that the current or voltage on the high-voltage wire falls within a preset range, a high-voltage circuit interruption is determined not to have occurred in the high-voltage circuit 106. This high-voltage circuit interruption failure may occur due to a loose high-voltage connector, a broken high-voltage wire, or a thermal accident that has caused the high-voltage connection contacts to burn out.

[0042] The control module 110 identifies whether the high-voltage component has failed or experienced a serious fault. When the control module 110 sends a preset instruction to the high-voltage component, if the high-voltage component fails to execute the preset action according to the preset instruction within a predetermined time t (t is a calibrated quantity, such as several hundred milliseconds), the high-voltage component is determined to have experienced an action timeout fault. For example, when the control module 110 sends a preset instruction to increase the current to the high-voltage component, if the motor in the high-voltage component fails to execute the preset action to increase the speed within the predetermined time, the high-voltage component is determined to have experienced an action timeout fault. When the control module 110 detects a serious fault in the high-voltage component, the high-voltage component can directly report the fault information. Specifically, the high-voltage component can be controlled or fault reporting can be performed via the vehicle's communication bus (such as the CAN bus). Examples of serious faults in the high-voltage component include, but are not limited to, a failure in the battery pack 1051 that prevents the motorcycle 10 from starting, a leakage in the battery pack 1051 that causes a fire or electrical accident, and poses a threat to the safety of the driver and surrounding personnel.

[0043] It should be noted that the division of modules in this embodiment is a logical division based on different functions, rather than a fixed division of modules. In an actual motorcycle 10, the modules may overlap or call each other when executing functions.

[0044] In some embodiments of the present application, the motorcycle 10 further includes a bus, through which the control module 110 is respectively connected to the sensing unit 108, the high-voltage circuit protection module 109, the data upload module 111, and the information alarm module 112. The bus may be an RS485 bus.

[0045] In the embodiment of the present application, the control module 110 may be, but is not limited to, a vehicle control unit (VCU), a body control module (BCM), and the like.

[0046] The vehicle controller is the core controller of the motorcycle 10. The vehicle controller has functions such as driving control, component management, energy management, status monitoring, fault handling, and information exchange with other components in the motorcycle 10. For example, in the embodiment of the present application, the vehicle controller can control the high-voltage circuit protection module 109 based on parameter information sensed by the sensing unit 108.

[0047] The body controller (BC) is the hub for information management and communication within the motorcycle 10. It includes body devices (rearview mirrors, doors, trunk), interior devices (lighting, rear air conditioning, rear seat controls), convenience devices (lighting, side steps, sun visor), and safety devices (remote keyless entry, immobilizer, alarm system). The BC manages the motorcycle's various power loads and provides diagnostic capabilities. It also provides motor drive technology (DC and PWM).

[0048] For ease of understanding, the following describes in detail the safety control operations performed after a collision of the motorcycle 10:

[0049] The sensing unit 108 detects detection information such as the speed, acceleration, tilt angle, etc. of the motorcycle 10, and sends the detection information to the control module 110. The control module 110 determines the state of the motorcycle 10 based on the detection information such as the speed, acceleration, tilt angle, etc. Among them, the state of the motorcycle 10 includes vehicle collision, rollover and / or fall that poses a potential danger to people. When the state of the motorcycle 10 is a collision, the control module 110 identifies the collision level. Specifically, the control module 110 can determine the collision level based on the received detection information. Among them, the detection information also includes information such as the angular velocity, longitudinal acceleration, current speed, etc. of the motorcycle 10 in the motion plane detected by the inertial measurement unit (IMU). When the longitudinal acceleration of motorcycle 10 on the motion plane is greater than or equal to acceleration threshold α (α is a calibration value, and an appropriate threshold value can be selected through experimentation), control module 110 determines that motorcycle 10 has collided. Furthermore, if the current speed of motorcycle 10 at this time is greater than a preset speed v1 (v1 is a calibration value, such as 25 km / h to 40 km / h), control module 110 determines that the collision level of motorcycle 10 is severe. Control module 110 controls high-voltage circuit protection module 109 to disconnect high-voltage circuit 106, thereby reducing the risk to motorcycle 10, the driver, and surrounding personnel caused by a failure of high-voltage circuit 106.

[0050] In one embodiment, if the longitudinal acceleration of the motorcycle 10 on the motion plane is less than the acceleration threshold α, the control module 110 determines that the motorcycle 10 has not collided.

[0051] In one embodiment, if the longitudinal acceleration of the motorcycle 10 on the motion plane is greater than or equal to the acceleration threshold α, and the current speed of the motorcycle 10 is less than or equal to the preset speed v1, the control module 110 determines that the collision level of the motorcycle 10 is a minor collision.

[0052] In other embodiments, the collision level may be divided into multiple levels according to the longitudinal acceleration and current speed of the motorcycle 10. For example, the collision level may include a general level between a severe level and a mild level, which is not limited in this application.

[0053] In some embodiments, the inertial measurement device can also sense the motion state of the motorcycle 10 in the vertical plane. Furthermore, the motorcycle 10 can also be equipped with an angle sensor to detect the angle information of the motorcycle 10 during the accident process, thereby classifying the accident process or verifying the credibility of the classification.

[0054] In some embodiments, when the control module 110 determines that the motorcycle 10 has been involved in a severe collision, the control module 110 sends a power-off command to the power system 104, causing the power system 104 to disconnect the connection between the high-voltage battery and the high-voltage circuit 106 via a circuit breaker, thereby irreversibly disconnecting the high-voltage circuit 106 of the motorcycle 10. The circuit breaker must be designed to ensure high reliability, ensuring that the vehicle promptly disconnects the high-voltage main circuit in the high-voltage circuit 106 in the event of an accident. The circuit breaker can be a high-voltage circuit breaker. A high-voltage circuit breaker can not only disconnect or close the no-load current and load current in the high-voltage circuit, but also, when a system fault occurs, such as an overload current or a short-circuit current, the high-voltage circuit breaker can disconnect the high-voltage main circuit in the high-voltage circuit 106 via a relay protection device. It should be noted that when the control module 110 determines that the motorcycle 10 has been involved in a severe collision, there is no need to perform a fault analysis on the high-voltage circuit 106; the high-voltage circuit in the motorcycle 10 is directly disconnected, thereby avoiding the danger caused by the high-voltage circuit 106.

[0055] When the control module 110 determines that the motorcycle 10 has suffered a minor collision, the control module 110 performs a fault detection analysis on the high-voltage circuit 106. If the fault detection analysis indicates that the high-voltage circuit 106 has no fault defects, the high-voltage circuit protection system 100 is maintained in a usable state, and the motorcycle 10 can maintain normal power output through the high-voltage circuit protection system 100. If the fault detection analysis indicates that the high-voltage circuit 106 has a fault defect, the control module 110 sends a power-off command to the power system 104, causing the power system 104 to disconnect the connection between the high-voltage battery and the high-voltage circuit through the circuit breaker protection device, so that the motorcycle 10 irreversibly disconnects the high-voltage circuit 106.

[0056] In an embodiment of the present application, when the control module 110 determines the state of the motorcycle 10 based on the detection information sent by the sensing unit 108, it can also verify the credibility of the identification of the accident and thereby improve the identification for different application scenario conditions. For example, the driving environment of the off-road track of the motorcycle 10 is quite different from the normal driving environment. The control module 110 in the motorcycle 10 can set the acceleration threshold for determining whether the motorcycle 10 has collided based on the current application scenario to avoid the situation where false collision detection may frequently occur on the off-road track. In some other embodiments, the current application scenario can also be detected by other sensors, and the acceleration threshold can be adjusted according to the current application scenario. For example, the current application scenario can be determined by the video image captured by the camera. When it is determined that the current application scenario is an off-road track, the acceleration threshold is increased to reduce the situation of false collision detection.

[0057] In the embodiment of the present application, when the high-voltage circuit 106 of the motorcycle 10 is irreversibly disconnected, it means that the motorcycle 10 cannot be reactivated by powering on. This can avoid the dangers that may arise from restarting the motorcycle 10 after a serious collision that causes serious damage to the high-voltage circuit 106. For example, it can avoid the danger that may arise from a short circuit between a damaged live high-voltage conductor and the body of the motorcycle 10.

[0058] In the embodiment of the present application, when the control module 110 determines that the motorcycle 10 has suffered a minor collision and confirms through fault detection and analysis that the high-voltage circuit 106 is not faulty, the control module 110 reversibly disconnects the high-voltage circuit 106. This means that the motorcycle 10 can reactivate the high-voltage circuit 106 by powering it back on after the high-voltage power is disconnected. Specifically, after the motorcycle 10 is powered on and started, the control module 110 performs fault detection and analysis to confirm that the high-voltage circuit 106 is not faulty, and then activates the high-voltage circuit protection system 100. This embodiment of the present application saves control time.

[0059] In the embodiment of the present application, when the control module 110 disconnects the high-voltage circuit 106, it can trigger an active discharge function for one or more bus capacitors in the high-voltage circuit. After disconnecting the high-voltage circuit 106, the residual energy in the one or more bus capacitors is monitored and quickly discharged, thereby preventing potential electric shock risks to personnel caused by the bus capacitors.

[0060] It should be noted that the fault detection and analysis performed on the high voltage circuit 106 includes but is not limited to insulation fault detection, high voltage interlock fault detection, high voltage circuit interruption detection, high voltage component function failure detection or serious fault detection.

[0061] For ease of understanding, the following describes in detail how to cut off the high-voltage circuit 106 when the motorcycle 10 crashes or experiences thermal runaway.

[0062] Assume that the motorcycle 10 is in a collision situation. The collision situation of the motorcycle 10 is detected by the sensing unit 108. In this embodiment, when the longitudinal acceleration of the motorcycle 10 on the motion plane is greater than or equal to the acceleration threshold α, the control module 110 determines that the motorcycle 10 has been in a collision. If the current speed of the motorcycle 10 is greater than the preset speed v1 at this time, the control module 110 determines that the collision level of the motorcycle 10 is a severe collision. In other embodiments, the pressure value can also be detected by a pressure sensor. The sensing unit 108 sends the pressure value to the control module 110 via the vehicle bus. The control module 110 compares the pressure value with the preset pressure value. If it is determined that the pressure value is greater than or equal to the preset pressure value, it is determined that the motorcycle 10 has been in a severe collision. If it is determined that the pressure value is less than the preset pressure value, it is determined that the motorcycle 10 has not been in a severe collision.

[0063] Sensing unit 108 detects whether the motorcycle 10 is experiencing thermal runaway. For example, a temperature sensor detects the current temperature of battery pack 1051. Sensing unit 108 transmits the temperature information to control module 110 via the vehicle bus. Control module 110 compares the temperature information with preset temperature information. If the temperature information is greater than or equal to the preset temperature information, thermal runaway is determined to have occurred on the motorcycle 10. If the temperature information is less than the preset temperature information, thermal runaway is not determined to have occurred on the motorcycle 10.

[0064] When the control module 110 determines that the motorcycle 10 has experienced a severe collision or thermal runaway, it sends an execution instruction to the smart fuse 4 in the high-voltage circuit protection module 109, controlling the smart fuse 4 to perform active protection, disconnecting the high-voltage circuit 106, and causing the motorcycle 10 to power off. By proactively controlling the smart fuse 4 to disconnect the high-voltage circuit 106 upon detecting a severe collision or thermal runaway, the high-voltage circuit 106 can be disconnected promptly, preventing nearby personnel from touching the circuit 106 and potentially causing electric shock, as well as minimizing the risk of damage or deformation of components in the high-voltage circuit 106, which could cause a short circuit and potentially lead to a fire on the motorcycle 10.

[0065] It should be noted that, in the embodiment of the present application, the control module 110 can determine whether the motorcycle 10 is currently in a collision state based on the data collected by the sensing unit 108. The determination of whether the motorcycle 10 is in a collision state has been described above and will not be repeated here.

[0066] For ease of understanding, the following describes in detail how to cut off the high-voltage circuit 106 when the high-voltage circuit 106 of the motorcycle 10 is overloaded or short-circuited:

[0067] When the motorcycle 10 crashes, but the control module 110 determines that the motorcycle 10 has not suffered a serious crash and has not experienced thermal runaway, the sensing unit 108 detects whether the high-voltage circuit 106 is overloaded or short-circuited. For example, the current sensor in the high-voltage circuit protection module 109 detects the current value of the high-voltage circuit 106. The sensing unit 108 sends the current current value to the control module 110 via the vehicle bus. The control module 110 compares the current current value with a preset current current value. If the current current value is greater than or equal to the preset current current value, the control module 110 determines that the high-voltage circuit 106 is overloaded or short-circuited. If the current current value is less than the preset current current value, the motorcycle 10 is determined not to be overloaded or short-circuited.

[0068] After determining that the high-voltage circuit 106 is overloaded or short-circuited, the control module 110 continues to determine whether the current value is less than a first preset threshold. When it is determined that the current value is less than the first preset threshold, the control module 110 sends a control signal to the contactor to control the contactor to open, thereby cutting off the high-voltage circuit 106. In this way, even if the high-voltage circuit 106 is overloaded or short-circuited, the high-voltage circuit 106 can be preferentially disconnected by the contactor when it is determined that the current current is low or below the low multiple.

[0069] It should be noted that the contactor at least includes Figure 3 The main positive contactor 1, pre-charge contactor 2, and main negative contactor 7 are shown in FIG. The control module 110 sends a control signal to the contactors. Controlling the contactor disconnection may be controlling all contactors to disconnect. For example, controlling the main positive contactor 1 to disconnect, controlling the pre-charge contactor 2 to disconnect, and controlling the main negative contactor 7 to disconnect.

[0070] When the control module 110 determines that the current current value is greater than or equal to the first preset threshold, it continues to determine whether the current current value is less than the second preset threshold. When it is determined that the current current value is less than the second preset threshold, the control module 110 sends an execution instruction to the smart fuse 4 in the high-voltage circuit protection module 109, controlling the smart fuse 4 to perform active protection, cutting off the high-voltage circuit 106, and the motorcycle 10 executes the power-off process.

[0071] When the control module 110 determines that the current value is greater than or equal to the second preset threshold, the control module 110 sends an execution instruction to the smart fuse 4 in the high-voltage circuit protection module 109. The smart fuse 4 receives the execution instruction sent by the control module 110 and actively cuts off the thermal fuse to cut off the high-voltage circuit 106. Therefore, when it is determined that the high-voltage circuit 106 is overloaded or short-circuited, but the current current is determined to be a high current, the thermal fuse in the smart fuse 4 performs a thermal melting action to achieve passive cutting off of the high-voltage circuit 106.

[0072] It should be noted that the first preset threshold is lower than the second preset threshold, and the range from the first preset threshold to the second preset threshold must at least cover the blind spot that cannot be protected when the contactor and the smart fuse are disconnected via thermal melt mode. For example, the first preset threshold may be 1kA, and the second preset threshold may be 3kA.

[0073] The present application provides a motorcycle and a control method thereof, which uses an intelligent fuse 4 to actively cut off a thermal fuse instead of a copper busbar, thereby effectively eliminating the protection blind spots existing in the traditional power distribution system of an electric motorcycle 10 and actively cutting off a high-voltage circuit in an emergency, thereby improving the safety of the motorcycle.

[0074] In order to solve the technical problem that the related art does not promptly cut off the high-voltage circuit 106 according to the collision fault of the motorcycle 10, resulting in low safety, please refer to Figure 4 As shown, Figure 4 This is a flowchart of a control method for a motorcycle provided in the first embodiment of the present application, which is applied to a motorcycle (e.g. Figure 1 According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted.

[0075] In step S401 , detection information of the motorcycle 10 is collected and sent to the control module 110 .

[0076] In the embodiment of the present application, detection information of the motorcycle 10 is collected by the sensing unit 108 , and the detection information at least includes the longitudinal acceleration and / or the current speed of the motorcycle 10 on the motion plane.

[0077] In step S402, the control module 110 determines whether the motorcycle 10 has collided based on the detection information. If it is determined that the motorcycle 10 has not collided, step S403 is executed; if it is determined that the motorcycle 10 has collided, step S404 is executed.

[0078] In one embodiment, if the longitudinal acceleration of the motorcycle 10 on the moving plane is greater than or equal to the acceleration threshold α, it is determined that the motorcycle 10 has encountered a collision; if the longitudinal acceleration of the motorcycle 10 on the moving plane is less than the acceleration threshold α, it is determined that the motorcycle 10 has not encountered a collision.

[0079] Step S403: Control the motorcycle 10 to maintain a normal driving state.

[0080] In one embodiment, if it is determined that the motorcycle 10 has not collided, the control module 110 controls the motorcycle 10 to maintain the original state and continue to travel normally.

[0081] Step S404: Determine whether the collision level is severe. If the collision level is severe, proceed to step S405; if the collision level is not severe, proceed to step S406.

[0082] In one embodiment, whether the collision level is severe is determined by determining whether the current speed of the motorcycle 10 at the time of the collision is greater than a preset speed. If the current speed of the motorcycle 10 at the time of the collision is greater than the preset speed, the collision level is determined to be severe; if the current speed of the motorcycle 10 at the time of the collision is less than or equal to the preset speed, the collision level is determined to be non-serious.

[0083] In step S405 , the control module 110 cuts off the high-voltage circuit.

[0084] In one embodiment, when the motorcycle 10 is severely impacted, the control module 110 cuts off the high-voltage circuit. Figure 5 Description.

[0085] Step S406: Determine whether a fault occurs in the high-voltage circuit 106. If it is determined that a fault occurs in the high-voltage circuit 106, return to step S405; if it is determined that no fault occurs in the high-voltage circuit 106, return to step S403.

[0086] In an embodiment of the present application, the control module 110 performs a fault detection and analysis on the high-voltage circuit 106. If the fault detection and analysis indicates that the high-voltage circuit 106 has no fault defects, the high-voltage circuit protection system 100 is maintained in a usable state, and the motorcycle 10 can maintain normal power output through the high-voltage circuit protection system 100. Step S403 is executed to control the motorcycle 10 to maintain a normal driving state. If the fault detection and analysis indicates that the high-voltage circuit 106 has a fault defect, the control module 110 sends a power-off command to the power system 104, so that the power system 104 disconnects the connection between the high-voltage battery and the high-voltage circuit through the circuit breaker protection device, so that the motorcycle irreversibly disconnects the high-voltage circuit 106. Step S405 is executed, and the control module 110 disconnects the high-voltage circuit 106.

[0087] In order to solve the technical problem that the related technology does not timely cut off the high-voltage circuit according to the motorcycle collision fault, resulting in low safety, please refer to Figure 5 As shown, Figure 5 This is a flowchart of a control method for a motorcycle provided in the first embodiment of the present application, which is applied to a motorcycle (e.g. Figure 1 According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted.

[0088] In step S501 , detection information of the motorcycle 10 is collected and sent to the control module 110 , wherein the detection information includes the longitudinal acceleration and / or the current speed of the motorcycle 10 on the motion plane.

[0089] Step S502: Determine whether the motorcycle 10 has experienced a collision or thermal runaway based on the detection information. If it is determined that the motorcycle 10 has experienced a collision or thermal runaway, execute step S503; if it is determined that the motorcycle 10 has not experienced a collision or thermal runaway, execute step S504.

[0090] Step S503 : Sending an execution instruction to the smart fuse 4 in the high-voltage circuit protection module 109 to control the smart fuse 4 to cut off the high-voltage circuit 106 .

[0091] The control module 110 sends an execution instruction to the smart fuse 4 , and the smart fuse 4 performs active protection, disconnecting the high-voltage circuit 106 , and the motorcycle 10 executes the power-off process.

[0092] Step S504: Determine whether the high-voltage circuit 106 of the motorcycle 10 is overloaded or short-circuited based on the current current value in the detection information. If it is determined that the high-voltage circuit 106 is overloaded or short-circuited, execute step S505; if it is determined that the high-voltage circuit 106 is not overloaded or short-circuited, return to step S502.

[0093] Step S505: Determine whether the current current value is less than a first preset threshold value. If it is determined that the current current value is less than the first preset threshold value, execute step S506; if it is determined that the current current value is greater than or equal to the first preset threshold value, execute step S507.

[0094] Step S506 : the control module 110 sends a control signal to the contactor in the high-voltage circuit protection module 109 to control the contactor to be disconnected, thereby cutting off the high-voltage circuit 106 .

[0095] The control module 110 sends a control signal to the contactor, the contactor is actuated, and the circuit is disconnected.

[0096] Step S507: When the current value is determined to be greater than or equal to the first preset threshold, the control module 110 determines whether the current value is less than a second preset threshold. If the current value is less than the second preset threshold, step S503 is executed; if the current value is greater than or equal to the second preset threshold, step S508 is executed.

[0097] Step S508: the intelligent fuse 4 cuts off the high-voltage circuit 106 by thermal melting.

[0098] In an embodiment of the present application, the present application can control the high-voltage circuit protection system 100 to cut off the high-voltage circuit 106 according to the detection information output by the sensing unit 108, effectively eliminating the protection blind spot existing in the traditional power distribution system of the motorcycle 10, and actively cut off the high-voltage circuit 106 in an emergency situation, thereby improving the safety of the driver or passengers.

[0099] Figure 6 This is a flowchart of another motorcycle control method provided by an embodiment of the present application. In an emergency, when a dangerous situation of adhesion failure of the contactor in the high-voltage circuit protection module 109 is detected, how to protect the high-voltage circuit 106. The contactor includes a main positive contactor 1 and a main negative contactor 7. Figure 6 The embodiment shown includes the following steps:

[0100] In step S601 , detection information of the motorcycle 10 is collected and sent to the control module 110 , wherein the detection information includes the longitudinal acceleration and current speed of the motorcycle 10 on the motion plane.

[0101] Step S602: Determine whether the motorcycle 10 has collided based on the detection information. If it is determined that the motorcycle 10 has collided, execute step S603; if it is determined that the motorcycle 10 has not collided, return to step S601.

[0102] In some embodiments of the present application, the detailed description of steps S601-S602 can be found in Figure 5 Steps S501 - S502 of the illustrated embodiment.

[0103] In step S603, the control module 110 determines whether the contactor has a sticking fault. If it is determined that the contactor has a sticking fault, the process proceeds to step S604; if it is determined that the contactor has not a sticking fault, the process returns to step S603.

[0104] In an embodiment of the present application, the control module 110 detects the voltages before and after the main positive contactor 1 and the main negative contactor 7 and determines whether the contactor has a sticking fault based on the voltage conditions. Specifically, in the case of high voltage during high-voltage discharge, after controlling the main negative contactor 7 to close, its voltages V3 and V4 can be detected. If V3>V4>12V, it is determined that the state of the main negative contactor 7 is unable to close normally; if V3=V4, it is determined that its state is normally closed. Similarly, after controlling the main positive contactor 1 to close and disconnecting the pre-charge contactor 2, the voltages V1 and V2 are detected. If V1>V2>12V, it is determined that the state of the main positive contactor 1 is unable to close normally; if V1=V2, it is determined that its state is normally closed. If, during high voltage discharge, the voltages V1, V2, V3, and V4 detected after controlling the main positive contactor 1 and the main negative contactor 7 to disconnect satisfy V1=V2 and V3=V4, then it can be determined that both contactors are in a sticking state.

[0105] Step S604 : Sending an execution instruction to the smart fuse 4 in the high-voltage circuit protection module 109 to control the smart fuse 4 to cut off the high-voltage circuit 106 .

[0106] In some embodiments of the present application, the specific description of step S604 can be found in Figure 5 Step S503 of the illustrated embodiment.

[0107] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules is merely a logical function division, and there may be other division methods in actual implementation. The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed across multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0108] In addition, the functional modules in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A motorcycle comprising: vehicle body; wheels, including front and rear wheels; a suspension system comprising a front suspension and a rear suspension, wherein the front wheels are connected to the vehicle body via the front suspension, and the rear wheels are connected to the vehicle body via the rear suspension; a power system, disposed on the motorcycle body and configured to provide power to the motorcycle; an energy system, the energy system being electrically connected to the power system; a high-voltage circuit, the high-voltage circuit being connected to the energy system; A high-voltage circuit protection system is provided in the high-voltage circuit; It is characterized in that the high-voltage circuit protection system includes a high-voltage circuit protection module, a sensing unit and a control module, the control module is connected to the sensing unit, the high-voltage circuit protection module is connected to the control module, and the high-voltage circuit protection module is used to control the disconnection and connection of the high-voltage circuit; the control module receives the longitudinal acceleration and the current vehicle speed output by the sensing unit, and controls the high-voltage circuit protection module to cut off the high-voltage circuit when the longitudinal acceleration is greater than or equal to the acceleration threshold and the current vehicle speed is greater than a preset speed.

2. The motorcycle according to claim 1, wherein: The control module is further configured to determine whether a fault occurs in the high-voltage circuit when the longitudinal acceleration is less than the acceleration threshold and the current vehicle speed is less than the preset speed, and to control the high-voltage circuit protection module to cut off the high-voltage circuit when it is determined that a fault occurs in the high-voltage circuit.

3. The motorcycle according to claim 1 or 2, characterized in that: When the control module determines that the longitudinal acceleration is less than the acceleration threshold, the current vehicle speed is less than the preset speed, and that there is no fault in the high-voltage circuit, the motorcycle is controlled to maintain a normal driving state.

4. The motorcycle according to claim 3, wherein: The control module determines whether a fault occurs in the high-voltage circuit by performing a fault detection analysis on the high-voltage circuit, wherein the fault detection analysis includes insulation fault detection, high-voltage interlock fault detection, high-voltage circuit interruption detection, and high-voltage component function failure detection.

5. The motorcycle according to claim 1, wherein: The control module further controls the motorcycle to maintain a normal driving state when determining that the longitudinal acceleration is less than the acceleration threshold.

6. The motorcycle according to claim 1, wherein: The high-voltage circuit protection system also includes a data upload module and an information alarm module, which are connected to the control module. The data upload module is used to remotely send the received determination results and detection information to a mobile terminal device via wireless communication after the control module determines that the motorcycle has a collision accident and cuts off the high-voltage circuit; the information alarm module is used to send corresponding alarm information when the control module determines that the high-voltage circuit has a fault.

7. The motorcycle according to claim 6, wherein: The controlling the high-voltage circuit protection module to cut off the high-voltage circuit includes: The control module sends a control signal to the contactor in the high-voltage circuit protection module to control the contactor to disconnect and cut off the high-voltage circuit; or The control module sends an execution instruction to the smart fuse in the high-voltage circuit protection module to control the smart fuse to cut off the high-voltage circuit.

8. A control method for a motorcycle, applied to a motorcycle, wherein the motorcycle includes a high-voltage circuit protection system, the high-voltage circuit protection system including a high-voltage circuit protection module, a sensing unit, and a control module; It is characterized in that The method comprises: The sensing unit collects the longitudinal acceleration and current speed of the motorcycle, and sends the longitudinal acceleration and current speed to the control module; When the control module determines that the longitudinal acceleration is greater than or equal to the acceleration threshold and the current vehicle speed is greater than a preset speed, the control module controls the high-voltage circuit protection module to cut off the high-voltage circuit in the motorcycle.

9. The control method for a motorcycle according to claim 8, wherein: The method further comprises: When the longitudinal acceleration is less than the acceleration threshold and the current vehicle speed is less than the preset speed, it is determined whether the high-voltage circuit has a fault, and when it is determined that the high-voltage circuit has a fault, the high-voltage circuit protection module is controlled to cut off the high-voltage circuit.

10. The control method for a motorcycle according to claim 8, wherein: The method further includes determining whether a fault occurs in the high-voltage circuit by performing a fault detection analysis on the high-voltage circuit, wherein the fault detection analysis includes insulation fault detection, high-voltage interlock fault detection, high-voltage circuit interruption detection, and high-voltage component function failure detection.

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