Electric motorcycle and insulation fault treatment method thereof

Abstract

The present application provides an insulation fault processing method and an electric motorcycle. The insulation fault processing method includes: obtaining the insulation resistance value and high-voltage power supply condition of the electric motorcycle; determining the operating state of the electric motorcycle according to the insulation resistance value and the high-voltage power supply condition; if the operating state of the electric motorcycle is determined to be a fault state, obtaining the current operating speed of the electric motorcycle; if the current operating speed is greater than a first speed threshold, limiting the current operating speed to less than or equal to the first preset vehicle speed after a first preset time. When the present application determines that the operating state of the electric motorcycle is a fault state and the current operating speed is greater than the first speed threshold, the current operating speed is limited to less than or equal to the first preset vehicle speed after a first preset time, so that the electric motorcycle can be powered off at high voltage in a safer state, thereby avoiding safety accidents caused by sudden high-voltage power outage of the electric motorcycle while it is driving, and improving the safety of electric motorcycle driving.

Description

Technical Field

[0001] The present application relates to the field of vehicle safety, and in particular to an electric motorcycle and a method for handling insulation failures thereof. Background Art

[0002] With the development of electric motorcycle technology, the vehicle voltage platform has gradually evolved from the traditional 48V voltage platform to the 72V or 350V voltage platform. Some large motorcycles even use an 800V voltage platform. In order to reduce the probability of electric shock accidents, vehicles usually have an insulation resistance monitoring function. When the vehicle monitors the insulation resistance value below the specified threshold, an alarm signal is triggered to remind the driver. Furthermore, a power output restriction command will be executed. However, due to the strong off-road performance of electric motorcycles, limiting the vehicle power in some scenarios (such as high-speed turning, cornering, climbing, and going uphill) will cause other serious consequences. This derivative problem caused by the vehicle failure strategy needs to be solved urgently. Summary of the invention

[0003] In order to solve the problems in the prior art, the present application provides an electric motorcycle and an insulation fault processing method thereof to improve the driving safety of the electric motorcycle.

[0004] In a first aspect, the present application provides an insulation fault processing method, which is applied to an electric motorcycle. The insulation fault processing method includes: obtaining the insulation resistance value and the high-voltage power supply condition of the electric motorcycle; determining the operating state of the electric motorcycle according to the insulation resistance value and the high-voltage power supply condition; if it is determined that the operating state of the electric motorcycle is a fault state, obtaining the current operating speed of the electric motorcycle; if the current operating speed is greater than a first speed threshold, limiting the current operating speed to less than or equal to the first preset vehicle speed after a first preset time period.

[0005] In one embodiment, determining the operating state of the electric motorcycle according to the insulation resistance value and the high-voltage power supply situation includes: if the insulation resistance value is less than a first preset resistance value and greater than a second preset resistance value, and the high-voltage power supply situation is that the high voltage is not powered on, determining that the electric motorcycle is a first-level fault; wherein the second preset resistance value is less than the first preset resistance value; if the insulation resistance value is less than the second preset resistance value, and the high-voltage power supply situation is that the high voltage is not powered on, determining that the electric motorcycle is a second-level fault; if the insulation resistance value is less than the second preset resistance value, and the high-voltage power supply situation is that the high voltage is powered on, determining that the electric motorcycle is a third-level fault; if it is determined that the operating state of the electric motorcycle is a fault state, obtaining the current operating speed of the electric motorcycle includes; if it is determined that the operating state of the electric motorcycle is the third-level fault, obtaining the current operating speed of the electric motorcycle.

[0006] In one embodiment, the insulation fault processing method also includes: if it is determined that the electric motorcycle has a level one fault, issuing an alarm message; if it is determined that the electric motorcycle has a level two fault, issuing an alarm message, recording fault data, and prohibiting the high-voltage power supply of the electric motorcycle from being powered on; if it is determined that the electric motorcycle has a level three fault, and the current operating speed is adjusted to be less than or equal to the first preset vehicle speed after a first preset time period, issuing an alarm message, recording fault data, and disconnecting the power supply of the high-voltage power supply of the electric motorcycle.

[0007] In one embodiment, limiting the current running speed to less than or equal to a first preset speed after a first preset time period includes: limiting the current running speed to less than or equal to a second preset speed after a second preset time period, and limiting the current running speed to less than or equal to the first preset speed after the first preset time period; wherein the first preset speed is less than the second preset speed.

[0008] In one embodiment, limiting the current running speed to less than or equal to the first preset vehicle speed after a first preset time period includes: obtaining acceleration information of the electric motorcycle; determining the acceleration holding time of the electric motorcycle according to the acceleration information; controlling the electric motorcycle to maintain the current acceleration state according to the acceleration holding time period; after the holding time period ends, limiting the current running speed of the electric motorcycle to less than or equal to the first preset vehicle speed after the first preset time period.

[0009] In one embodiment, determining the acceleration holding time of the electric motorcycle according to the acceleration information includes: obtaining acceleration depth information of the electric motorcycle, the acceleration depth information including the pedaling depth of the accelerator pedal or the rotation degree of the accelerator handlebar; determining the acceleration holding time of the electric motorcycle according to the acceleration depth information and the current running speed.

[0010] In one embodiment, limiting the current running speed to less than or equal to a first preset vehicle speed after a first preset time period includes: obtaining a tilt angle of the electric motorcycle; if the tilt angle is less than a preset tilt angle, controlling the electric motorcycle to maintain a current running state; if the tilt angle is greater than or equal to the preset tilt angle, limiting the current running speed to less than or equal to the first preset vehicle speed after the first preset time period.

[0011] In one embodiment, the insulation fault handling method also includes: if the current operating speed is less than a first speed threshold, and the high voltage power supply situation is that the high voltage is powered on, an alarm message is issued, fault data is recorded, and the high voltage power supply of the electric motorcycle is disconnected.

[0012] In one embodiment, limiting the current running speed to less than or equal to a first preset vehicle speed after a first preset time period includes: obtaining a tilt angle of the electric motorcycle; if the tilt angle is less than the preset tilt angle, controlling the electric motorcycle to maintain the current running state; if the tilt angle is greater than or equal to the preset tilt angle, obtaining acceleration information of the electric motorcycle; determining the acceleration holding time of the electric motorcycle based on the acceleration information; controlling the electric motorcycle to maintain the current acceleration state according to the acceleration holding time; after the holding time period ends, limiting the current running speed to less than or equal to the first preset vehicle speed within the first preset time period.

[0013] The present application also proposes an electric motorcycle, comprising a body, wheels, and a power system; the wheels comprise a front wheel and a rear wheel; the power system is supported by the body and is used to provide power for the two-wheeled vehicle, and at least one of the front wheel and the rear wheel is connected to the power system; the electric motorcycle also comprises a vehicle controller, a speed detection device, and an insulation resistance detection circuit; the insulation resistance detection circuit is used to detect the insulation resistance value of the electric motorcycle; the speed detection device is used to detect the current running speed of the electric motorcycle; the vehicle controller is used to obtain the high-voltage power supply condition of the electric motorcycle, and determine the running state of the electric motorcycle according to the insulation resistance value and the high-voltage power supply condition; the vehicle controller is also used to control the power system to limit the current running speed to less than or equal to the first preset vehicle speed after a first preset time period when it is determined that the running state of the electric motorcycle is a fault state and the current running speed is greater than a first speed threshold.

[0014] When the present application determines that the running state of the electric motorcycle is a fault state and the current running speed is greater than a first speed threshold, the current running speed is limited to be less than or equal to the first preset vehicle speed after a first preset time period, so that the electric motorcycle can be powered off at high voltage or otherwise processed in a relatively safe state, thereby avoiding safety accidents caused by sudden high-voltage power failure of the electric motorcycle while it is in motion, and improving the safety of electric motorcycle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the entire electric motorcycle according to an embodiment of the present application.

[0016] Figure 2 Schematic diagram of the module of the electric motorcycle according to an embodiment of the present application.

[0017] Figure 3 This is a flow chart of a method for handling insulation failure of an electric motorcycle according to an embodiment of the present application.

[0018] Figure 4This is a flow chart of limiting the speed of an electric motorcycle according to acceleration information according to an embodiment of the present application.

[0019] Figure 5 This is a flow chart of limiting the speed of an electric motorcycle according to a tilt angle according to an embodiment of the present application.

[0020] Figure 6 This is a flow chart of limiting the speed of an electric motorcycle according to acceleration information and a tilt angle according to an embodiment of the present application.

[0021] Main component symbols

[0022] Electric motorcycle 100 Vehicle body 110

[0023] Wheel 120 Front wheel 121

[0024] Rear wheels 122 Power system 130

[0025] Vehicle controller 140 Speed ​​detection device 160

[0026] Body angle detection 190 Insulation resistance detection 170

[0027] Device Road

[0028] Acceleration device 180 Position detection device 150

[0029] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0031] Reference Figure 1 and Figure 2 The present application provides an electric motorcycle 100, including a body 110, wheels 120 and a power system 130. The wheels 120 include a front wheel 121 and a rear wheel 122. The power system 130 is supported by the body 110 and is used to provide power for the electric motorcycle 100, and at least one of the front wheel 120 and the rear wheel 122 is connected to the power system 130.

[0032] The electric motorcycle 100 further includes a vehicle controller 140, a speed detection device 160 and an insulation resistance detection circuit 170. The insulation resistance detection circuit 170 is used to detect the insulation resistance value of the electric motorcycle 100. For example, the power system 130 includes a battery pack and a motor, and the battery pack drives the motor to provide power for the two-wheeled vehicle. The insulation resistance value can be the insulation resistance value of the battery pack relative to the body ground of the electric motorcycle 100; the speed detection device 160 is used to detect the current running speed of the electric motorcycle 100; the vehicle controller 140 is used to obtain the high-voltage power supply condition of the electric motorcycle 100, and determine the running state of the electric motorcycle 100 according to the insulation resistance value and the high-voltage power supply condition; the vehicle controller 140 is also used to control the power system 130 to limit the current running speed to less than or equal to the first preset vehicle speed after the first preset time period when it is determined that the running state of the electric motorcycle 100 is a fault state and the current running speed is greater than the first speed threshold.

[0033] In this embodiment, the speed detection device 160 can be implemented by using a speed sensor to detect the rotation speed of the wheel 120, and the insulation resistance detection circuit 170 can be an independent insulation resistance detection circuit 170 or integrated into the battery management system of the battery pack. The vehicle controller 140 can be implemented by using a chip with control and data processing functions such as a microprocessor and FPGA.

[0034] When the vehicle controller 140 determines that the electric motorcycle 100 is in a fault state according to the insulation resistance value detected by the insulation detection circuit and the high-voltage power supply situation of the electric motorcycle 100, for example, when the insulation resistance value is less than the preset resistance value and the electric motorcycle 100 has been powered on at high voltage, it can be determined that the electric motorcycle 100 is in a fault state. When the electric motorcycle 100 is in a fault state and the current operating speed is greater than the first speed threshold, in order to avoid the high-voltage power failure causing the electric motorcycle 100 to have a driving safety problem, the present embodiment can control the power system 130 through the vehicle controller 140 to limit the current operating speed to less than or equal to the first preset vehicle speed after the first preset time. In this way, the electric motorcycle 100 can keep running within the first preset time, and gradually reduce the current operating speed to less than or equal to the first preset vehicle speed. For example, when the electric motorcycle 100 has an insulation fault at a high speed or when turning, if the vehicle controller 140 immediately disconnects the high-voltage power supply, the driver cannot control the vehicle speed autonomously, which may cause the vehicle to roll over or collide. This embodiment controls the power system 130 to limit the current running speed to less than or equal to the first preset speed after the first preset time, so that the electric motorcycle 100 can still maintain the running state for a period of time, and slowly reduce the speed to less than or equal to the first preset speed during this period of time. In this way, the electric motorcycle 100 can disconnect the high-voltage power supply or perform other processing in a relatively safe state after driving through the current road section, thereby improving the driving safety of the electric motorcycle 100.

[0035] The first preset speed can be set to 0km / h, 5km / h or 10km / h to ensure that the electric motorcycle 100 does not cause safety risks to the driver when or after deceleration. The first preset time can be set according to the current running speed. If the current running speed is high, the first preset time can be set to be longer to avoid driving safety risks caused by sudden deceleration when the vehicle is running at high speed.

[0036] In one embodiment, the insulation resistance detection circuit 170 determines whether the electric motorcycle 100 has an insulation fault by respectively detecting the insulation resistance of the positive and negative electrodes of the battery pack relative to the vehicle body ground. The electric motorcycle 100 is further specifically determined to be in a certain fault state according to the high voltage power supply of the electric motorcycle 100, so as to execute different processing strategies according to different fault states.

[0037] For example, if the insulation resistance value is less than the first preset resistance value, greater than the second preset resistance value, and the high voltage power supply situation is that the high voltage is not powered on, it is determined that the electric motorcycle 100 is a first-level fault; wherein the second preset resistance value is less than the first preset resistance value, for example, the first preset resistance value may be 1000Ω / V, and the second preset resistance value may be 500Ω / V. At this time, the insulation fault is slight, and since the high voltage is not powered on, the impact on the driver is small, and the vehicle controller 140 may issue an alarm message to prompt the driver.

[0038] If the insulation resistance value is less than the second preset resistance value, and the high voltage power supply situation is that the high voltage is not powered on, it is determined that the electric motorcycle 100 is a secondary fault. At this time, the insulation fault is relatively minor, but if the electric motorcycle 100 is powered on and driven, it may cause a safety accident. The vehicle controller 140 can issue an alarm message to remind the driver, record the fault data for fault analysis, and prohibit the high voltage power supply of the electric motorcycle 100 from being powered on, that is, prohibit the electric motorcycle 100 from being powered on and driven in this fault state, to ensure the safety of the driver.

[0039] If the insulation resistance value is less than the second preset resistance value, and the high-voltage power supply situation is that the high voltage has been powered on, it is determined that the electric motorcycle 100 is a level 3 fault. At this time, the insulation fault is more serious, but the electric motorcycle 100 is in a driving state. In order to avoid a sudden high-voltage power failure causing a safety accident of the electric motorcycle 100, the vehicle controller 140 can further obtain the current running speed of the electric motorcycle 100, and when the current running speed is greater than the first speed threshold, the current running speed is adjusted to the first preset vehicle speed after the first preset time, and an alarm message is issued, fault data is recorded for fault analysis, and the high-voltage power supply of the electric motorcycle 100 is disconnected. In this way, the electric motorcycle 100 is powered off at high voltage in a safer state to ensure the safety of the driver. When the current running speed is greater than the first speed threshold, an alarm message is issued, fault data is recorded, and the high-voltage power supply of the electric motorcycle 100 is disconnected.

[0040] The present application detects the insulation resistance value through the insulation detection circuit, and the speed detection device 160 detects the current running speed of the electric motorcycle 100 so that the vehicle controller 140 can determine the fault state of the electric motorcycle 100. When the vehicle controller 140 determines that the running state of the electric motorcycle 100 is a fault state and the current running speed is greater than the first speed threshold, the current running speed is limited to be less than or equal to the first preset vehicle speed after the first preset time, so that the electric motorcycle 100 can be powered off at high voltage or other processing in a relatively safe state, avoiding safety accidents caused by sudden high voltage power failure of the electric motorcycle 100 in the driving state, and improving the driving safety of the electric motorcycle 100.

[0041] Reference Figure 3The present application also proposes an insulation fault processing method, which is applied to the above-mentioned electric motorcycle 100. The insulation fault processing method includes the following steps:

[0042] S1: Obtaining the insulation resistance value and high voltage power supply status of the electric motorcycle 100;

[0043] S2: determining the operating state of the electric motorcycle 100 according to the insulation resistance value and the high voltage power supply condition;

[0044] S3: if it is determined that the running state of the electric motorcycle 100 is a fault state, obtaining the current running speed of the electric motorcycle 100;

[0045] S4: If the current running speed is greater than the first speed threshold, the current running speed is limited to be less than or equal to the first preset vehicle speed after a first preset time period.

[0046] In this embodiment, when the electric motorcycle 100 is determined to be in a fault state according to the insulation resistance value and the high-voltage power supply situation, and the current operating speed is greater than the first speed threshold, in order to avoid the high-voltage power failure causing the electric motorcycle 100 to have a driving safety problem, this embodiment limits the current operating speed to less than or equal to the first preset speed after the first preset time. In this way, the electric motorcycle 100 can keep running within the first preset time, and gradually reduce the current operating speed to less than or equal to the first preset speed. For example, if the electric motorcycle 100 has an insulation fault when the running speed is high or when turning, if the high-voltage power supply is disconnected immediately, the driver cannot control the vehicle speed autonomously, which may cause the vehicle to roll over or collide. In this embodiment, by limiting the current operating speed to less than or equal to the first preset speed after the first preset time, the electric motorcycle 100 can still maintain the running state for a period of time, and slowly reduce the speed to less than or equal to the first preset speed during this period. In this way, the electric motorcycle 100 can disconnect the high-voltage power supply or do other processing in a relatively safe state after driving through the current section, thereby improving the driving safety of the electric motorcycle 100.

[0047] The first preset speed can be set to 0km / h, 5km / h or 10km / h to ensure that the electric motorcycle 100 does not cause safety risks to the driver when decelerating. The first preset time can be set according to the current running speed. If the current running speed is high, the first preset time can be set to be longer to avoid driving safety risks caused by sudden deceleration when the vehicle is running at high speed.

[0048] In one embodiment, the insulation resistance of the positive and negative electrodes of the battery pack relative to the vehicle body ground can be detected to determine whether the electric motorcycle 100 has an insulation fault. The fault state of the electric motorcycle 100 can be further determined based on the high voltage power supply of the electric motorcycle 100, so that different processing strategies can be implemented according to different fault states.

[0049] In one embodiment, if it is determined that the running state of the electric motorcycle is a fault state, after obtaining the current running speed of the electric motorcycle, the insulation fault processing method further includes the following steps:

[0050] S5: If the current running speed is less than the first speed threshold, and the high voltage power supply situation is that the high voltage is powered on, an alarm message is issued, fault data is recorded, and the high voltage power supply of the electric motorcycle 100 is disconnected.

[0051] In this embodiment, after determining that the insulation resistance value of the electric motorcycle 100 is less than the second preset resistance value, it indicates that the insulation fault of the electric motorcycle 100 is relatively serious, and the high-voltage power supply situation is that the high voltage has been powered on, which may cause high-voltage leakage. At this time, the current running speed is less than the first speed threshold, indicating that the running speed of the electric motorcycle 100 is within a safe range, and the fault can be handled while ensuring the safety of the driver. That is, after the current running speed of the electric motorcycle 100 is adjusted to the first preset speed after the first preset time, an alarm message is issued, the fault data is recorded, and the high-voltage power supply of the electric motorcycle 100 is disconnected.

[0052] For example, refer to Figure 4 , Figure 3 S2: Determining the operating state of the electric motorcycle 100 according to the insulation resistance value and the high voltage power supply condition includes the following steps:

[0053] S21: If the insulation resistance value is less than the first preset resistance value and greater than the second preset resistance value, and the high voltage power supply situation is that the high voltage is not powered on, it is determined that the electric motorcycle 100 is a first-level fault. The second preset resistance value is less than the first preset resistance value, for example, the first preset resistance value may be 1000Ω / V, and the second preset resistance value may be 500Ω / V.

[0054] If the insulation resistance value is less than the second preset resistance value, and the high voltage power supply situation is that the high voltage is not powered on, it is determined that the electric motorcycle 100 is a secondary fault.

[0055] If the insulation resistance value is less than the second preset resistance value, and the high voltage power supply condition is that the high voltage is powered on, it is determined that the electric motorcycle 100 is a third-level fault.

[0056] Figure 3 S3: if it is determined that the running state of the electric motorcycle 100 is a fault state, obtaining the current running speed of the electric motorcycle 100 includes the following steps;

[0057] S31: If it is determined that the running state of the electric motorcycle 100 is a third-level fault, the current running speed of the electric motorcycle 100 is obtained to further determine the fault handling strategy according to the current running speed.

[0058] In one embodiment, the insulation fault processing method further includes the following steps:

[0059] S22: After determining that the electric motorcycle 100 is in a first-level fault, an alarm message is issued.

[0060] At this time, the insulation fault is minor and has little impact on the driver. The vehicle controller 140 can issue an alarm message to alert the driver.

[0061] After determining that the electric motorcycle 100 has a secondary fault, an alarm message is issued, fault data is recorded, and the high voltage power supply of the electric motorcycle 100 is prohibited from being powered on.

[0062] At this time, the insulation fault is relatively minor, but if the electric motorcycle 100 is powered on and running, it may cause a safety accident. The vehicle controller 140 can prompt the driver by issuing an alarm message, record the fault data for fault analysis, and prohibit the high-voltage power supply of the electric motorcycle 100 from being powered on, that is, prohibit the electric motorcycle 100 from being powered on and running in this fault state to ensure the safety of the driver.

[0063] It is determined that the electric motorcycle 100 has a third-level fault, and after the current running speed is adjusted to the first preset speed after the first preset time, an alarm message is issued, fault data is recorded, and the high-voltage power supply of the electric motorcycle 100 is disconnected.

[0064] At this time, the insulation fault is serious, but the electric motorcycle 100 is in a running state. To avoid a safety accident of the electric motorcycle 100 caused by a sudden high-voltage power failure, the vehicle controller 140 can adjust the current running speed to the first preset vehicle speed within a first preset time, issue an alarm message, record the fault data for fault analysis, and disconnect the high-voltage power supply of the electric motorcycle 100. In this way, the high-voltage power is cut off in a relatively safe state to ensure the safety of the driver.

[0065] The present application determines the fault state of the electric motorcycle 100 according to the insulation resistance value and the current running speed of the electric motorcycle 100. When the vehicle controller 140 determines that the running state of the electric motorcycle 100 is a fault state and the current running speed is greater than the first speed threshold, the current running speed is limited to be less than or equal to the first preset vehicle speed after a first preset time, so that the electric motorcycle 100 performs high-voltage power-off or other processing in a relatively safe state, avoiding safety accidents caused by sudden high-voltage power-off of the electric motorcycle 100 when the electric motorcycle 100 is running at high speed, and improving the driving safety of the electric motorcycle 100.

[0066] In one embodiment, limiting the current running speed to less than or equal to the first preset vehicle speed after the first preset time period may include: limiting the current running speed to less than or equal to the second preset vehicle speed after the second preset time period, and limiting the current running speed to less than or equal to the first preset vehicle speed after the first preset time period.

[0067] In this embodiment, when the vehicle controller 140 determines that the electric motorcycle 100 is in a fault state, the power system 130 is first controlled to adjust the speed of the electric motorcycle 100 to the second preset speed within the second preset time. For example, the power system 130 is controlled to limit the speed of the electric motorcycle 100 to less than or equal to 60 km / h within 10 seconds, so as to limit the speed of the electric motorcycle 100 to a safe range. Afterwards, after the second preset time ends, the speed of the electric motorcycle 100 is limited to less than or equal to the first preset speed after the first preset time. For example, after the second preset time ends, the speed of the electric motorcycle 100 is limited to 0 km / h within 40 seconds, completing the deceleration of the electric motorcycle 100.

[0068] In one embodiment, after determining that the running state of the electric motorcycle 100 is a fault state and obtaining that the current running speed of the electric motorcycle 100 is greater than the first speed threshold, the insulation fault processing method further includes the following steps:

[0069] S41: Acquiring acceleration information of the electric motorcycle 100;

[0070] S42: Determine the acceleration holding time of the electric motorcycle 100 according to the acceleration information;

[0071] S43: Control the electric motorcycle 100 to maintain the current acceleration state according to the acceleration maintenance time;

[0072] S44: After the holding time expires, the current running speed is limited to be less than or equal to the first preset vehicle speed after the first preset time.

[0073] In this embodiment, the electric motorcycle 100 further includes an acceleration device 180. The vehicle controller 140 can obtain acceleration information of the electric motorcycle 100 through the acceleration device 180, and the acceleration information may include a target speed, acceleration duration, and the like.

[0074] In some acceleration scenarios, immediately disconnecting the high voltage when an insulation fault occurs in the electric motorcycle 100 may cause a safety accident. For example, when the electric motorcycle 100 is accelerating while passing through a traffic light section, if the high voltage is disconnected, the electric motorcycle 100 may not be able to continue accelerating and pass through the traffic light section. At this time, it is easy to collide with other vehicles, affecting the personal safety of the driver.

[0075] In order to cope with more complex road conditions, after determining that the electric motorcycle 100 is in a fault state, this embodiment further obtains acceleration information of the electric motorcycle 100, determines the acceleration holding time of the electric motorcycle 100 according to the acceleration information, and controls the electric motorcycle 100 to maintain the current acceleration state according to the acceleration holding time, so that the electric motorcycle 100 completes the acceleration action. Then, the current running speed is limited to less than or equal to the first preset speed after the first preset time, so as to limit the running speed of the electric motorcycle 100 in a safer state and improve the driving safety of the electric motorcycle 100.

[0076] In one embodiment, determining the acceleration holding time of the electric motorcycle 100 according to the acceleration information includes the following steps:

[0077] S421: Acquire acceleration depth information of the electric motorcycle 100, where the acceleration depth information includes the stepping depth of the accelerator pedal or the rotation degree of the accelerator handlebar.

[0078] S422: Determine the acceleration holding time of the electric motorcycle 100 according to the acceleration depth information and the current running speed.

[0079] In this embodiment, the electric motorcycle 100 also includes a position detection device 150, and the acceleration device 180 can be an accelerator pedal or an acceleration handle of the electric motorcycle 100. When the driver steps on the accelerator pedal or turns the accelerator handle, the position detection device 150 can detect the displacement depth and displacement speed of the accelerator pedal, or detect the rotation depth and rotation speed of the accelerator handle, and output a corresponding electrical signal to the vehicle controller 140. The vehicle controller 140 can obtain the acceleration depth information of the acceleration device 180 based on the electrical signal, determine the driver's acceleration intention (such as target speed, acceleration duration, etc.), and determine the acceleration holding duration of the electric motorcycle 100 based on the target speed and the current running speed, so that the electric motorcycle 100 can complete the acceleration action within the acceleration holding duration. Among them, the position detection device 150 can be implemented by using a position sensor.

[0080] Reference Figure 5 In one embodiment, after determining that the running state of the electric motorcycle 100 is a fault state and obtaining that the current running speed of the electric motorcycle 100 is greater than the first speed threshold, the insulation fault processing method further includes the following steps:

[0081] S45: Obtaining the tilt angle of the electric motorcycle 100;

[0082] S46: If the tilt angle is less than the preset tilt angle, the electric motorcycle 100 is controlled to maintain the current running state;

[0083] S47: If the inclination angle is greater than or equal to the preset inclination angle, the current running speed is limited to be less than or equal to the first preset vehicle speed after the first preset time period.

[0084] In this embodiment, the electric motorcycle 100 further includes a body angle detection device 190 , which can be implemented by a gyroscope, a level sensor, or the like.

[0085] After determining that the running state of the electric motorcycle 100 is a fault state and obtaining that the current running speed of the electric motorcycle 100 is greater than the first speed threshold, the present embodiment further obtains the inclination angle of the vehicle body to determine the current driving state of the electric motorcycle 100. If the inclination angle is less than the preset inclination angle, it means that the body of the electric motorcycle 100 is relatively close to the ground and may be turning at high speed. At this time, if the speed of the electric motorcycle 100 is limited or the high voltage power is cut off, the electric motorcycle 100 may not be able to return to the right position and fall. For example, when an electric motorcycle is driving on a steep mountain road or when the electric motorcycle is turning at high speed, if the vehicle has a serious insulation fault, limiting the power output may cause other driving risks. In order to avoid a safety accident of the electric motorcycle 100 caused by the fault handling at this time, the present embodiment controls the electric motorcycle 100 to maintain the current running state in the above case until the inclination angle is greater than or equal to the preset inclination angle, and then limits the current running speed to less than or equal to the first preset vehicle speed after the first preset time.

[0086] Reference Figure 6 After determining that the running state of the electric motorcycle 100 is a fault state and obtaining that the current running speed of the electric motorcycle 100 is greater than the first speed threshold, the insulation fault processing method further includes the following steps:

[0087] S48: Acquire the tilt angle of the electric motorcycle 100;

[0088] S49: If the tilt angle is less than the preset tilt angle, the electric motorcycle 100 is controlled to maintain the current running state;

[0089] S410: If the tilt angle is greater than or equal to the preset tilt angle, acquiring acceleration information of the electric motorcycle 100;

[0090] S411: Determine the acceleration holding time of the electric motorcycle 100 according to the acceleration information;

[0091] S412: Control the electric motorcycle 100 to maintain the current acceleration state according to the acceleration maintenance time;

[0092] S413: After the holding time expires, the current running speed is limited to be less than or equal to a first preset vehicle speed within a first preset time.

[0093] In this embodiment, if the tilt angle is greater than or equal to the preset tilt angle, the acceleration information of the electric motorcycle 100 is further obtained. If the electric motorcycle 100 is accelerating, the acceleration holding time of the electric motorcycle 100 is determined according to the acceleration information, and the electric motorcycle 100 is controlled to maintain the current acceleration state according to the speed holding time. In other words, even if the tilt angle is greater than or equal to the preset tilt angle, if the electric motorcycle 100 is in the acceleration state, the electric motorcycle 100 is controlled to complete the current acceleration action first, and then perform fault processing. In this way, the electric motorcycle 100 can perform safe fault processing when facing more complex road conditions, thereby further improving the driving safety of the electric motorcycle 100.

[0094] In the above, the specific implementation of the present application is described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific implementation of the present application without departing from the spirit and scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A method for handling insulation failure of an electric motorcycle, characterized in that: The insulation fault processing method comprises: Obtain the insulation resistance value and high voltage power supply status of the electric motorcycle; determining the operating state of the electric motorcycle according to the insulation resistance value and the high voltage power supply condition; If it is determined that the running state of the electric motorcycle is a fault state, obtaining the current running speed of the electric motorcycle; If the current running speed is greater than a first speed threshold, the current running speed is limited to be less than or equal to a first preset vehicle speed after a first preset time period.

2. The insulation fault processing method according to claim 1, characterized in that: The step of determining the operating state of the electric motorcycle according to the insulation resistance value and the high voltage power supply condition comprises: If the insulation resistance value is less than the first preset resistance value and greater than the second preset resistance value, and the high voltage power supply situation is that the high voltage is not powered on, it is determined that the electric motorcycle is a first-level fault; wherein the second preset resistance value is less than the first preset resistance value; If the insulation resistance value is less than the second preset resistance value, and the high voltage power supply situation is that the high voltage is not powered on, it is determined that the electric motorcycle is a secondary fault; If the insulation resistance value is less than the second preset resistance value, and the high voltage power supply condition is that the high voltage is powered on, it is determined that the electric motorcycle is a level 3 fault; If it is determined that the running state of the electric motorcycle is a fault state, obtaining the current running speed of the electric motorcycle includes: If it is determined that the operating state of the electric motorcycle is the third-level fault, the current operating speed of the electric motorcycle is obtained.

3. The insulation fault processing method according to claim 2, characterized in that: The insulation fault processing method further comprises: If it is determined that the electric motorcycle has a first-level fault, an alarm message is issued; If it is determined that the electric motorcycle has a secondary fault, an alarm message is issued, fault data is recorded, and the high voltage power supply of the electric motorcycle is prohibited from being powered on; If it is determined that the electric motorcycle has a third-level fault and the current running speed is adjusted to be less than or equal to the first preset speed after a first preset time, an alarm message is issued, fault data is recorded, and the high-voltage power supply of the electric motorcycle is disconnected.

4. The insulation fault processing method according to claim 1, characterized in that: The limiting the current running speed to be less than or equal to the first preset vehicle speed after the first preset time period includes: Acquiring acceleration information of the electric motorcycle; Determining the acceleration holding time of the electric motorcycle according to the acceleration information; Controlling the electric motorcycle to maintain a current acceleration state according to the acceleration holding time; After the acceleration holding time ends, the current running speed of the electric motorcycle is limited to be less than or equal to the first preset vehicle speed after the first preset time.

5. The insulation fault processing method according to claim 4, characterized in that: Determining the acceleration holding time of the electric motorcycle according to the acceleration information includes: Acquiring acceleration depth information of the electric motorcycle, wherein the acceleration depth information includes a stepping depth of an accelerator pedal or a rotation degree of an accelerator handlebar; The acceleration holding time of the electric motorcycle is determined according to the acceleration depth information and the current running speed.

6. The insulation fault processing method according to claim 1, characterized in that: The limiting the current running speed to be less than or equal to the first preset vehicle speed after the first preset time period includes: The current running speed is limited to be less than or equal to a second preset vehicle speed after a second preset time period, and is limited to be less than or equal to the first preset vehicle speed after the first preset time period; wherein the first preset vehicle speed is less than the second preset vehicle speed.

7. The insulation fault processing method according to claim 1, characterized in that: The limiting the current running speed to be less than or equal to the first preset vehicle speed after the first preset time period includes: Obtaining the tilt angle of the electric motorcycle; If the tilt angle is less than a preset tilt angle, controlling the electric motorcycle to maintain a current running state; If the inclination angle is greater than or equal to the preset inclination angle, the current running speed is limited to be less than or equal to a first preset vehicle speed after the first preset time period.

8. The insulation fault processing method according to claim 1, characterized in that: The insulation fault processing method further comprises: If the current running speed is less than the first speed threshold, and the high-voltage power supply situation is that the high voltage is powered on, an alarm message is issued, fault data is recorded, and the high-voltage power supply of the electric motorcycle is disconnected.

9. The insulation fault processing method according to claim 1, characterized in that: The limiting the current running speed to be less than or equal to the first preset vehicle speed after the first preset time period includes: Obtaining the tilt angle of the electric motorcycle; If the tilt angle is less than a preset tilt angle, controlling the electric motorcycle to maintain a current running state; If the tilt angle is greater than or equal to the preset tilt angle, acquiring acceleration information of the electric motorcycle; Determining the acceleration holding time of the electric motorcycle according to the acceleration information; Controlling the electric motorcycle to maintain a current acceleration state according to the acceleration holding time; After the holding time ends, the current running speed is limited to be less than or equal to the first preset vehicle speed within the first preset time.

10. An electric motorcycle, comprising: Vehicle body; Wheels, the wheels comprising a front wheel and a rear wheel; A power system, the power system is supported by the vehicle body and is used to provide power for the electric motorcycle, and at least one of the front wheel and the rear wheel is connected to the power system; Characterized in that the electric motorcycle also includes a vehicle controller, a speed detection device and an insulation resistance detection circuit; The insulation resistance detection circuit is used to detect the insulation resistance value of the electric motorcycle; the speed detection device is used to detect the current running speed of the electric motorcycle; the vehicle controller is used to obtain the high-voltage power supply condition of the electric motorcycle, and determine the running state of the electric motorcycle according to the insulation resistance value and the high-voltage power supply condition; the vehicle controller is also used to control the power system to limit the current running speed to less than or equal to the first preset vehicle speed after a first preset time period when it is determined that the running state of the electric motorcycle is a fault state and the current running speed is greater than a first speed threshold.

Images