Range extender operation safety monitoring method and device and terminal equipment

Abstract

The invention provides a range extender operation safety monitoring method and device and terminal equipment, and is suitable for the technical field of new energy automobiles, and the method comprises the steps: obtaining operation parameters, operation parameter duration and operation mode information of a range extender; based on the operation mode information, calculating an operation parameter threshold according to the operation parameters; and obtaining safety monitoring information of the range extender according to the operation mode information, the operation parameter, the operation parameter duration, the operation parameter threshold, a preset target parameter and a preset duration threshold. Real-time monitoring is carried out through the operation parameters and the operation parameter duration time of the range extender, and fault pre-judgment is carried out on the range extender in different operation states through the change condition and the operation parameter duration time of the range extender, so that the range extender can be monitored before the range extender breaks down. And measures are taken in advance in time aiming at possible faults of the range extender, so that the safety and the reliability in the running process of the range extending type automobile are improved.

Description

Technical Field

[0001] The present application belongs to the field of new energy vehicle technology, and in particular, relates to a method, device and terminal equipment for monitoring the operation safety of a range extender. Background Art

[0002] As an important branch of plug-in hybrid technology, extended-range electric vehicles have become a highlight of the development of new energy vehicles. Their growth rate is outstanding among the subdivided types of new energy vehicles, and their market share has also increased year by year. Among them, the range extender is the core energy supply component of the extended-range hybrid electric vehicle. It consists of an engine and a motor. The engine is coupled with the motor to drive the motor to rotate and generate electricity to continue to supply energy to the car. When the power battery is insufficient, the range extender can provide additional power to the battery pack, thereby extending the range of the electric vehicle. However, as a complex power system coupled with an engine and a motor, the complex mechanical, electrical and liquid coupling relationship causes the range extender to fail when one of the different components fails, which greatly reduces the reliability during operation and poses potential safety hazards. When the range extender fails, the most likely consequence is the occurrence of a flying car. A flying car refers to a failure phenomenon in which the speed of the range extender far exceeds the rated maximum speed, causing the engine to vibrate violently, emit a roar, and emit a large amount of black or blue smoke from the exhaust pipe. In addition, the high voltage generated by the motor in the case of a flying car can easily damage the auto parts and cause the auto failure to endanger personal safety. Therefore, it is very necessary to deal with the faults caused by the range extender in a timely manner.

[0003] In the prior art, the method for judging and handling the fault of the range extender is usually to set a fixed maximum speed threshold, and then compare the actual speed of the range extender with the fixed maximum speed threshold. When the actual speed is greater than the fixed maximum speed threshold, it is determined that the range extender has a fault, and then the range extender is cut off from oil and power.

[0004] However, in the prior art, only a fixed maximum speed threshold is used to determine whether the range extender has a fault, and only one fault type is set. It is impossible to timely determine the fault of the range extender in different operating states and take fault handling measures suitable for the operating state, which makes the fault handling lack timeliness and flexibility, and cannot ensure the performance of automobile parts and the personal safety of automobile users. Summary of the invention

[0005] In view of this, the embodiments of the present application provide a method, device and terminal equipment for monitoring the operation safety of a range extender, which can perform fault determination on a range extender in different operating states, so as to take timely measures against possible faults of the range extender before the range extender fails.

[0006] A first aspect of an embodiment of the present application provides a range extender operation safety monitoring method, comprising: Obtaining operating parameters, operating parameter duration, and operating mode information of the range extender; Based on the operation mode information and according to the operation parameters, calculating an operation parameter threshold; Safety monitoring information of the range extender is obtained according to the operating mode information, operating parameters, operating parameter duration, operating parameter threshold, preset target parameters and preset duration threshold.

[0007] A second aspect of an embodiment of the present application provides a range extender operation safety monitoring device, comprising: An information acquisition module, used to obtain operating parameters, operating parameter duration, and operating mode information of the range extender; an operating parameter threshold calculation module, configured to calculate an operating parameter threshold based on the operating mode information and the operating parameters; and The safety monitoring information generation module is used to obtain the safety monitoring information of the range extender according to the operation mode information, operation parameters, operation parameter duration, operation parameter threshold, preset target parameters and preset duration threshold.

[0008] A third aspect of an embodiment of the present application provides a terminal device, comprising a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and when the processor executes the computer program, the steps of the range extender operation safety monitoring method as described in any one of the first aspects above are implemented.

[0009] A fourth aspect of an embodiment of the present application provides a computer-readable storage medium, comprising: storing a computer program, characterized in that when the computer program is executed by a processor, the steps of the range extender operation safety monitoring method as described in any one of the above-mentioned first aspects are implemented.

[0010] Compared with the prior art, the embodiments of the present application have the following beneficial effects: real-time monitoring of the operating parameters and operating parameter duration of the range extender is performed, and fault prediction of the range extender in different operating states is performed through the changes in the operating parameters and the duration of the operating parameters. Therefore, measures can be taken in advance for possible faults of the range extender before the range extender fails, thereby avoiding damage to automobile parts and endangering personal safety due to failure of the range extender, thereby improving the safety and reliability of the extended-range vehicle during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is a schematic diagram of the implementation flow of the range extender operation safety monitoring method provided in the embodiment of the present application; Figure 2 It is a schematic diagram of the implementation flow of the range extender operation safety monitoring method provided in the embodiment of the present application; Figure 3 It is a schematic diagram of the implementation flow of the range extender operation safety monitoring method provided in the embodiment of the present application; Figure 4 It is a schematic diagram of the implementation flow of the range extender operation safety monitoring method provided in the embodiment of the present application; Figure 5 It is a schematic diagram of the implementation flow of the range extender operation safety monitoring method provided in the embodiment of the present application; Figure 6 It is a structural schematic diagram of a range extender operation safety monitoring device provided in an embodiment of the present application; Figure 7 It is a schematic diagram of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0013] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0014] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0015] Figure 1 The following is a flowchart of the range extender operation safety monitoring method provided in the first embodiment of the present application, which is described in detail as follows: Step S101, obtaining operating parameters, operating parameter duration, and operating mode information of the range extender.

[0016] In this embodiment, the range extender includes a motor and an engine. Among them, the motor can be an ISG motor. The operating parameter of the range extender can be a speed, a torque, a motor power and an engine power. The duration of the operating parameter can be the duration of a certain speed, the duration of a certain torque, the duration of a certain motor power and the duration of a certain engine power. The operating mode information of the range extender usually includes three types: starting mode, power generation mode and shutdown mode. The starting mode refers to the motor speed starting to increase. When the motor speed is increased to a certain value, the engine injection, ignition and start are controlled at the same time to achieve the simultaneous start of the motor and the engine and start power generation. The power generation mode refers to the control of the motor speed and the engine torque after a smooth start, so that the motor and the engine work together to generate different electrical energy. The shutdown mode refers to gradually reducing the speed reduction of the motor and the torque of the engine until the motor stops rotating to turn off the operating mode of the range extender.

[0017] Step S102: Calculate an operating parameter threshold based on the operating mode information and the operating parameters.

[0018] In this embodiment, the operating parameter threshold can be the difference threshold between the current operating parameter and the manually set maximum or minimum value of the operating parameter, or it can be the maximum and minimum values ​​of the operating parameter. It can be obtained by multiplying the current operating parameter by a manually set coefficient. In different operating modes, the coefficient may be different.

[0019] In this embodiment, optionally, when the operating mode is the power generation mode and the speed is 3000r / min, the operating parameter threshold can be a difference threshold between the current speed and the manually set maximum speed, and the minimum speed difference can be 3000 times 5%, that is, 150r / min, and the maximum speed difference can be 3000 times 20%, that is, 600r / min.

[0020] Step S103, obtaining safety monitoring information of the range extender according to the operation mode information, the operation parameter, the operation parameter duration, the operation parameter threshold, the preset target parameter and the preset duration threshold.

[0021] In this embodiment, the current operating parameters and operating parameter duration of the range extender can be monitored in real time according to different operating modes. By comparing the current operating parameters with the manually set target parameters, or comparing them with the calculated operating parameter thresholds, it is used to determine whether the current operating parameters are within a reasonable range. By comparing the duration of the current operating parameters with the manually set duration threshold, it can be determined whether the current operating parameters have been abnormal or the measurement value fluctuates due to sensor reasons. When the current operating parameters are determined to be abnormal by the operating parameter threshold, only when the duration of the current operating parameters is not less than the preset duration threshold, it is indicated that the value of the current operating parameters is not due to the fluctuation of the sensor measurement value. The current operating parameters can be determined to be abnormal. The safety monitoring information of the range extender can be abnormal indication information or fault indication information for a certain operating parameter of the range extender, which is used to indicate which working parameter of the current range extender is abnormal or is about to cause the range extender to fail.

[0022] The range extender operation safety monitoring method provided in the embodiment of the present application performs real-time monitoring of the operating parameters and the operating parameter duration of the range extender, and predicts faults of the range extender in different operating states through changes in the operating parameters and the operating parameter duration. Therefore, before the range extender fails, measures can be taken in advance for possible faults of the range extender in a timely manner, thereby avoiding abnormal working conditions caused by unstable control of the range extender or damage to automobile parts and endangerment to personal safety due to failure of the range extender, thereby improving the safety and reliability of the extended-range vehicle during operation.

[0023] A range extender operation safety monitoring method provided in one of the embodiments of the present application is different from the above-mentioned embodiment 1 in that: the operation mode information includes a start-up mode, a power generation mode, and a shutdown mode.

[0024] In this embodiment, the operating mode information of the range extender generally includes three types: starting mode, power generation mode and shutdown mode. The starting mode refers to the start of the motor speed to increase. When the motor speed is increased to a certain value, the engine injection, ignition and start are controlled at the same time to achieve the simultaneous start of the motor and the engine and start power generation. The power generation mode refers to the control of the motor speed and the engine torque after a smooth start, so that the motor and the engine work together to generate different electrical energy. The shutdown mode refers to gradually reducing the speed of the motor and the torque of the engine until the motor stops rotating to turn off the operating mode of the range extender. Each operating mode can be manually set through the background control system.

[0025] Figure 2The flowchart of the range extender operation safety monitoring method provided in the second embodiment of the present application is shown, which differs from the first embodiment described above in that: The operating parameters include actual rotation speed; The operating parameter threshold includes a speed difference threshold; the speed difference threshold includes a first speed difference threshold, a second speed difference threshold, a third speed difference threshold and a fourth speed difference threshold, the first speed difference threshold is smaller than the second speed difference threshold, and the third speed difference threshold is smaller than the fourth speed difference threshold; The target parameters include a startup target speed and a power generation target speed; The operating parameter duration includes the actual speed difference duration; The duration threshold comprises an actual speed difference duration threshold; The safety monitoring information includes abnormal speed information and speed failure information; The step S103 specifically includes: Step S201, determine whether the operation mode information is the startup mode, if so, proceed to step S202; if not, proceed to step S208.

[0026] In this embodiment, when the operation mode of the range extender is the start-up mode, the speed of the range extender needs to be monitored in real time. By comparing the current speed of the range extender with the start-up target speed, it is used to determine whether the range extender can be started. Only when the speed of the range extender is greater than the start-up target speed after the range extender is powered on, the range extender can be started. The start-up target speed is determined by hardware properties and can be measured by artificial experiments on the range extender.

[0027] Step S202, calculating the difference between the actual speed and the startup target speed to obtain a first speed difference.

[0028] In this embodiment, when the actual speed is greater than the startup target speed, it means that the range extender is ready to start. At this time, it is necessary to determine whether the actual speed of the range extender is too high. At this time, whether the actual speed of the range extender is too high or too low indicates that there is an abnormality in the system. By subtracting the actual speed from the startup target speed, a first speed difference is obtained, and the first speed difference is compared with the artificially set first speed difference threshold, so as to determine whether the current speed is too high or the speed does not fluctuate within a reasonable range. When the actual speed is too high or the speed does not fluctuate within a reasonable range, timely measures must be taken to find out the cause to avoid system damage.

[0029] Step S203, determining whether the first speed difference is greater than the first speed difference threshold, if so, proceeding to step S204; if not, determining the safety monitoring information as normal speed information.

[0030] In this embodiment, the first speed difference threshold value may be artificially set, and may be obtained by multiplying the actual speed by an artificially set coefficient, or may be determined by the hardware properties of the range extender and measured through artificial experiments. When the first speed difference value is greater than the first speed difference threshold value, it indicates that the current speed of the range extender is too high or too low. If it is too high, countermeasures need to be taken to reduce the speed of the range extender or shut down the machine to prevent the speed of the range extender from further increasing. If it is too low, countermeasures need to be taken to reduce the speed of the range extender or shut down the machine, and timely measures need to be taken to find out the cause. When the first speed difference value is less than the first speed difference threshold value, it indicates that the speed control of the current range extender is stable and no measures need to be taken.

[0031] Step S204, determining whether the first speed difference is less than the second speed difference threshold, if so, proceeding to step S206; if not, proceeding to step S205.

[0032] In this embodiment, the second speed difference threshold value can be set manually, can be obtained by multiplying the actual speed by the manually set coefficient, or can be determined by the hardware properties of the range extender and measured by artificial experiments. When the first speed difference value is greater than the first speed difference threshold value and less than the second speed difference threshold value, it indicates that the speed fluctuation of the current range extender is too high, the control is unstable, and there is a risk of running away, but there is still some time before running away. At this time, countermeasures need to be taken to reduce the speed of the range extender to avoid the continuous increase of the speed of the range extender, so as to avoid the high voltage generated by the motor from damaging the parts in the car; when the first speed difference value is greater than the first speed difference threshold value and greater than the second speed difference threshold value, it indicates that the speed of the current range extender is already far higher than the normal speed, and it is very likely that running away will occur at the next moment, or it is possible that running away has already occurred. When it is judged that running away is about to occur or has already occurred, emergency measures should be taken for the range extender to stop the range extender from working to avoid damage to the parts in the car.

[0033] Step S205, determining whether the actual speed difference duration is greater than the actual speed difference duration threshold, if so, proceeding to step S207; if not, determining the safety monitoring information as abnormal speed information.

[0034] In this embodiment, the actual speed difference duration threshold can be set manually, and can be set according to experimental data after testing the hardware. When the actual speed difference duration is greater than the actual speed difference duration threshold, it means that the current actual speed has far exceeded the normal speed range, and emergency measures should be taken in time to shut down the range extender, otherwise the various components in the car will be damaged due to the excessive speed of the range extender and the excessive power generation of the motor. When the actual speed difference duration is less than the actual speed difference duration threshold, it means that the current actual speed exceeds the normal speed range. It is very likely that it is a normal fluctuation in the speed or a normal jump in the measured value of the measuring sensor. It cannot be said that the range extender has failed or is about to fail, and there is no need to take emergency measures for the range extender.

[0035] Step S206, determining whether the actual speed difference duration is greater than the actual speed difference duration threshold, if so, determining the safety monitoring information as abnormal speed information; if not, determining the safety monitoring information as normal speed information.

[0036] In this embodiment, the abnormal speed information means that the speed of the range extender has deviated from the normal speed range, but there is still some time before the runaway situation occurs. At this time, it is only necessary to reduce the speed of the range extender without completely shutting down the range extender. Among them, the normal speed range is obtained by experimental measurement of the hardware of the range extender by the staff.

[0037] Step S207: determining the safety monitoring information as speed fault information.

[0038] In this embodiment, the speed fault information means that the speed of the range extender has left the normal speed range, and a runaway situation is about to occur or has already occurred at the next moment. At this time, the speed of the range extender needs to be quickly reduced, and the range extender needs to be completely shut down to avoid damage to parts in the car due to the high pressure caused by the runaway situation.

[0039] Step S208, calculating the difference between the actual speed and the target power generation speed to obtain a second speed difference.

[0040] In this embodiment, when the range extender is in power generation mode or shutdown mode, it means that the range extender has successfully generated electricity. At this time, it is necessary to determine whether the actual speed of the range extender fluctuates too high, and whether it may be out of control, causing the range extender to rotate too fast and causing the parts in the car to be damaged due to high voltage. By subtracting the actual speed from the target power generation speed, a second speed difference is obtained, and the second speed difference is compared with the second speed difference threshold set manually, so as to determine whether the current speed fluctuates too high and whether control instability occurs. When the actual speed is too high, measures must be taken to prevent the range extender speed from further increasing. Among them, when the actual speed reaches the target power generation speed, the range extender starts to generate electricity at constant power. The target power generation speed is determined by the hardware properties and can be measured by the range extender through artificial experiments.

[0041] Step S209, determining whether the second speed difference is greater than the third speed difference threshold, if so, proceeding to step S210; if not, determining the safety monitoring information as normal speed information.

[0042] In this embodiment, the second speed difference threshold may be artificially set, and may be obtained by multiplying the actual speed by an artificially set coefficient, or may be determined by the hardware properties of the range extender and measured through artificial experiments. When the second speed difference is greater than the third speed difference threshold, it indicates that the current speed of the range extender is too high or too low. If it is too high, countermeasures need to be taken to reduce the speed of the range extender or shut down, so as to avoid further increase in the speed of the range extender. If it is too low, countermeasures need to be taken to reduce the speed of the range extender or shut down, and timely measures need to be taken to find out the cause. When the second speed difference is less than the third speed difference threshold, it indicates that the speed control of the current range extender is stable and no measures are needed.

[0043] Step S210, determining whether the second speed difference is less than the fourth speed difference threshold, if so, proceeding to step S212; if not, proceeding to step S211.

[0044] In this embodiment, the third speed difference threshold and the fourth speed difference threshold can be set manually, can be obtained by multiplying the actual speed by the manually set coefficient, or can be determined by the hardware properties of the range extender and measured by artificial experiments. When the second speed difference is greater than the third speed difference threshold and less than the fourth speed difference threshold, it indicates that the speed fluctuation of the current range extender is too high, and there is a risk of running away, but there is still some time before the running away occurs. At this time, countermeasures need to be taken to reduce the speed of the range extender to avoid the continuous increase in the speed of the range extender, thereby avoiding the high voltage generated by the motor from damaging the parts in the car; when the second speed difference is greater than the fourth speed difference threshold, it indicates that the speed of the current range extender is already much higher than the normal speed, and it is very likely that the running away will occur at the next moment, or it may have already occurred. When it is judged that the running away is about to occur or has already occurred, emergency measures should be taken for the range extender to stop the range extender from working to avoid damage to the parts in the car.

[0045] Step S211, determine whether the actual speed difference duration is greater than the actual speed difference duration threshold, if so, proceed to step S213; if not, determine the safety monitoring information as abnormal speed information.

[0046] In this embodiment, the actual speed difference duration threshold can be set manually, and can be set according to experimental data after testing the hardware. When the actual speed difference duration is greater than the actual speed difference duration threshold, it means that the current actual speed has far exceeded the normal speed range, and emergency measures should be taken in time to shut down the range extender, otherwise the various components in the car will be damaged due to the excessive speed of the range extender and the excessive power generation of the motor. When the actual speed difference duration is less than the actual speed difference duration threshold, it means that the current actual speed exceeds the normal speed range. It is very likely that it is a normal fluctuation in the speed or a normal jump in the measured value of the measuring sensor. It cannot be said that the range extender has failed or is about to fail, and there is no need to take emergency measures for the range extender.

[0047] Step S212, determining whether the safety monitoring information is determined as abnormal speed information, if so, determining the safety monitoring information as abnormal speed information; if not, determining the safety monitoring information as normal speed information.

[0048] In this embodiment, the abnormal speed information means that the speed of the range extender has deviated from the normal speed range, but there is still some time before the runaway situation occurs. At this time, it is only necessary to reduce the speed of the range extender without completely shutting down the range extender. Among them, the normal speed range is obtained by experimental measurement of the hardware of the range extender by the staff.

[0049] Step S213: determining the safety monitoring information as speed fault information.

[0050] In this embodiment, the speed fault information means that the speed of the range extender has left the normal speed range, and a runaway situation is about to occur or has already occurred at the next moment. At this time, the speed of the range extender needs to be quickly reduced, and the range extender needs to be completely shut down to avoid damage to parts in the car due to the high pressure caused by the runaway situation.

[0051] The range extender operation safety monitoring method provided in the embodiment of the present application monitors the speed of the range extender in real time. When the range extender is in the startup mode, it is determined whether the actual speed is higher than the normal speed range when the actual speed is higher than the startup target speed and starts normally, and it is able to determine whether the speed value higher than the normal speed range is a normal fluctuation of the speed or a normal jump of the sensor measurement value, thereby improving the accuracy of monitoring the abnormal speed situation, and facilitating timely measures when the speed is abnormal to avoid unstable control of the range extender. When the range extender is in the power generation mode or the shutdown mode, it is determined whether the actual speed is higher than the normal speed range when the actual speed is higher than the power generation target speed and generates power normally, and by determining whether the speed value higher than the normal speed range is a normal fluctuation of the speed or a normal jump of the sensor measurement value, the accuracy of judging the range extender fault is improved, and it is convenient to take emergency measures in time before the range extender is about to run away, so as to avoid damage to the parts in the car due to the runaway situation.

[0052] Figure 3 The flowchart of the range extender operation safety monitoring method provided in the third embodiment of the present application is shown. The difference between the third embodiment and the second embodiment is that after the step S103, the method further includes: Step S301, determine whether the safety monitoring information is abnormal speed information, if so, proceed to step S302; if not, proceed to step S303.

[0053] In this embodiment, the abnormal speed information is used to indicate that the current speed of the range extender has exceeded the normal speed, but has not deviated much. At this time, it is only necessary to reduce the speed of the range extender to avoid the occurrence of runaway.

[0054] Step S302, shutting down the range extender.

[0055] In this embodiment, the current speed of the range extender has exceeded the normal speed, but has not deviated much. At this time, it is only necessary to reduce the speed of the range extender or shut it down to avoid the occurrence of runaway, without completely shutting down the range extender.

[0056] Step S303, determining whether the safety monitoring information is speed fault information, if so, cutting off the fuel supply to the engine of the range extender; if not, not reducing the speed of the motor of the range extender, and not cutting off the fuel supply or power supply to the range extender.

[0057] In this embodiment, when the safety monitoring information shows that it is not abnormal speed information, it may be speed fault information or normal speed information. Speed ​​fault information is used to indicate that the current speed of the range extender has far exceeded the normal speed range. Even if the overrun situation has not occurred at present, the overrun situation is about to occur. Therefore, emergency measures need to be taken for the range extender, that is, to request the range extender to shut down, and to control the engine to cut off oil and power, and at the same time to cut off the power to the motor, so as to completely shut down the range extender while reducing the speed of the range extender. Otherwise, the high voltage electricity suddenly generated by the range extender will cause damage to parts in the car. Normal speed information is used to indicate that the current speed of the range extender has not deviated from the normal speed range, and there is no need to take measures to reduce the speed or shut down the range extender.

[0058] Step S304, determining whether the speed of the motor of the range extender decreases, if so, the motor of the range extender is not powered off until the range extender shuts down; if not, the motor of the range extender is powered off until the range extender shuts down.

[0059] In this embodiment, when the speed of the range extender is much higher than the normal speed range, it indicates that the range extender may be about to run away in the next second, so emergency measures need to be taken for the range extender, that is, the engine of the range extender is promptly cut off from fuel. When the speed of the motor has begun to drop continuously after the oil is cut off, there is no need to further process the range extender, and it is only necessary to wait for the speed of the range extender to decrease to the normal speed range. However, when the speed of the motor does not drop after the oil is cut off, it is necessary to cut off the power of the motor in time to avoid inputting power to the motor of the range extender, so that the speed of the motor of the range extender continues to drop to the normal range.

[0060] In this embodiment, when the range extender has an abnormal speed in the start-up mode, it indicates that the speed has fluctuated abnormally. For unstable control of the range extender, the measures to be taken may be to reduce the motor speed to shutdown, and the cause needs to be checked to prevent further damage to the system and excessive or too low speed; when the range extender has a speed failure in the start-up mode, it indicates that the range extender is out of control during the start-up process, and the measures to be taken may be to perform low-voltage power-off on the motor, and the cause needs to be checked to avoid the occurrence of flying when the speed is too high and to avoid the occurrence of stalling when the speed is too low. When the range extender has an abnormal speed in the power generation mode, it indicates that abnormal fluctuations occur during the power generation operation of the range extender, and the measures to be taken may be to reduce the torque of the engine and reduce the speed of the motor, and the cause needs to be checked to prevent further damage to the system, excessive or too low speed; when the range extender has a speed failure in the power generation mode, it indicates that the range extender is out of control, and the measures to be taken may be to cut off the oil and low-voltage electricity of the engine and the low-voltage electricity of the generator, and the cause needs to be checked to avoid flying and unexpected shutdown. When the range extender has an abnormal speed in the shutdown mode, it means that the range extender has an abnormal shutdown fluctuation. The measures to be taken may be to cut off the low voltage power of the engine and check the cause to prevent further damage to the system and the runaway situation caused by excessive speed; when the range extender has a speed failure in the shutdown mode, the measures to be taken may be to cut off the low voltage power of the motor and check the cause to prevent further damage to the system and the runaway situation caused by excessive speed.

[0061] The range extender operation safety monitoring method provided in the embodiment of the present application indicates whether the range extender is in an abnormal state according to the safety monitoring information, and takes different measures for the range extender according to different safety monitoring information, so as to avoid the occurrence of abnormal situations such as runaway, stalling, and engine torque out, thereby ensuring that various parts in the car will not be damaged due to abnormal speed or torque. When the speed of the range extender is much higher than the normal speed range, and the speed does not drop after the oil cut-off measure is taken, the motor and engine of the range extender are cut off from power, thereby forcibly cutting off the power source of the engine of the range extender, so that the speed of the motor of the range extender gradually drops to the normal speed range, effectively avoiding the damage of various parts of the car parts by the high pressure in the car caused by the excessive speed of the range extender.

[0062] Figure 4 The flowchart of the range extender operation safety monitoring method provided in the fourth embodiment of the present application is shown, which differs from the first embodiment described above in that: The operating parameters also include actual torque; The operating parameter threshold also includes a torque difference threshold; the torque difference threshold includes a first torque difference threshold, a second torque difference threshold, a third torque difference threshold and a fourth torque difference threshold, the first torque difference threshold is smaller than the second torque difference threshold, the third torque difference threshold is smaller than the fourth torque difference threshold; The target parameters also include a starting target torque and a power generation target torque; The operating parameter duration also includes the actual torque difference duration; The duration threshold also includes an actual torque difference duration threshold; The safety monitoring information also includes torque abnormality information and torque fault information; The step S103 specifically includes: Step S401, determine whether the operation mode information is the startup mode, if so, proceed to step S402; if not, proceed to step S408.

[0063] In this embodiment, when the operation mode of the range extender is the start-up mode, the torque of the range extender needs to be monitored in real time. By comparing the current torque of the range extender with the start-up target torque, it is used to determine whether the range extender can start normally. Only when the actual torque is greater than the start-up target torque after the range extender is powered on, the range extender can be ready to start. The start-up target torque is determined by hardware properties and can be measured by artificial experiments on the range extender.

[0064] Step S402, calculating the difference between the actual torque and the starting target torque to obtain a first torque difference.

[0065] In this embodiment, when the actual torque is greater than the starting target torque, it means that the range extender has been successfully started. At this time, it is necessary to determine whether the actual torque fluctuation of the range extender is too high. If the actual torque of the range extender is too high, the motor will generate more power, which may easily overcharge the vehicle battery pack. The first torque difference is obtained by subtracting the actual torque from the starting target torque, and the first torque difference is compared with the first torque difference threshold set manually to determine whether the current torque is too high. When the actual torque is too high, measures must be taken to avoid system damage.

[0066] Step S403, determining whether the first torque difference is greater than the first torque difference threshold, if so, proceeding to step S404; if not, determining the safety monitoring information as normal torque information.

[0067] In this embodiment, the first torque difference threshold value may be artificially set, and may be obtained by multiplying the actual torque by an artificially set coefficient, or may be determined by the hardware properties of the range extender and measured through artificial experiments. When the first torque difference value is greater than the first torque difference threshold value, it indicates that the torque of the current range extender is too high, and countermeasures need to be taken to reduce the torque of the range extender, so as to avoid the engine driving the motor to generate more high voltage electricity and cause damage to other parts in the car. When the first torque difference value is less than the first torque difference threshold value, it indicates that the torque of the current range extender is not too high, and no measures need to be taken to reduce the speed and torque of the range extender.

[0068] Step S404, determining whether the first torque difference is less than the second torque difference threshold, if so, proceeding to step S406; if not, proceeding to step S405.

[0069] In this embodiment, the second speed torque threshold can be set manually, can be obtained by multiplying the actual torque by the manually set coefficient, or can be determined by the hardware properties of the range extender and measured by artificial experiments. When the first torque difference is greater than the first torque difference threshold and less than the second torque difference threshold, it indicates that the current speed of the range extender is too high, and there is a risk of runaway, but there is still some time before runaway occurs. At this time, countermeasures need to be taken to reduce the torque of the range extender to avoid the continuous increase of the torque of the range extender, thereby avoiding the high voltage electricity generated by the engine driving the motor to damage the parts in the car; when the first torque difference is greater than the first torque difference threshold and greater than the second torque difference threshold, it indicates that the torque of the current range extender is already far higher than the normal torque, and it is very likely that runaway will occur at the next moment, or it is possible that runaway has already occurred. When it is determined that runaway is about to occur or has already occurred, emergency measures should be taken for the range extender to stop the engine of the range extender to avoid damage to the parts in the car.

[0070] Step S405, determining whether the actual torque difference duration is greater than the actual torque difference duration threshold, if so, proceeding to step S407; if not, determining the safety monitoring information as torque abnormality information.

[0071] In this embodiment, the actual torque difference duration threshold can be set manually, and can be set according to experimental data after testing the hardware. When the actual torque difference duration is greater than the actual torque difference duration threshold, it means that the current actual torque has far exceeded the normal torque range, and emergency measures should be taken in time to shut down the range extender, otherwise the range extender torque is too high and the motor power generation is too large, which will cause damage to various parts in the car. When the actual torque difference duration is less than the actual torque difference duration threshold, it means that the current actual torque exceeds the normal torque range, which is likely to be a normal fluctuation of the torque or a normal jump of the measured value of the measuring sensor. It cannot be said that the range extender has failed or is about to fail, and there is no need to take emergency measures for the range extender.

[0072] Step S406, determining whether the actual torque difference duration is greater than the actual torque difference duration threshold, if so, determining the safety monitoring information as torque abnormality information; if not, determining the safety monitoring information as torque normal information.

[0073] In this embodiment, the torque abnormality information means that the torque of the range extender has deviated from the normal torque range, but there is still some time before the runaway situation occurs. At this time, it is only necessary to reduce the torque of the range extender without completely shutting down the range extender. Among them, the normal torque range is obtained by experimental measurement of the hardware of the range extender by the staff.

[0074] Step S407: determining the safety monitoring information as torque fault information.

[0075] In this embodiment, the torque fault information means that the torque of the range extender has left the normal torque range, and a runaway situation is about to occur or has already occurred at the next moment. At this time, the torque and speed of the range extender need to be quickly reduced, and the range extender needs to be completely shut down to avoid damage to parts in the car due to the high pressure caused by the runaway situation.

[0076] Step S408: Calculate the difference between the actual torque and the power generation target torque to obtain a second torque difference.

[0077] In this embodiment, when the range extender is in power generation mode or shutdown mode, it means that the range extender has successfully generated electricity. At this time, it is necessary to determine whether the actual torque of the range extender is too high, and whether it is possible to cause the engine and motor to rotate too fast and cause the parts in the car to be damaged due to high voltage. By subtracting the actual torque from the target torque for power generation, a second torque difference is obtained, and the second torque difference is compared with the artificially set second torque difference threshold to determine whether the current torque is too high. When the actual torque is too high, measures must be taken to prevent the high voltage generated by the motor from damaging the parts in the car. Among them, when the actual torque is higher than the target torque for power generation, the range extender starts to generate electricity. The target torque for power generation is determined by hardware properties and can be measured by artificial experiments on the range extender.

[0078] Step S409, determining whether the second torque difference is greater than the third torque difference threshold, if so, proceeding to step S410; if not, determining the safety monitoring information as normal torque information.

[0079] In this embodiment, the second torque difference threshold can be set manually, and can be obtained by multiplying the actual torque by the manually set coefficient, or it can be determined by the hardware properties of the range extender and measured through artificial experiments. When the second torque difference is greater than the third torque difference threshold, it indicates that the torque of the current range extender is too high, and countermeasures need to be taken to reduce the torque of the range extender, so as to avoid the engine driving the motor to rotate too fast to generate more high voltage electricity and cause damage to other parts in the car. When the second torque difference is less than the third torque difference threshold, it indicates that the torque of the current range extender is not too high, and no measures need to be taken to reduce the torque and speed of the range extender.

[0080] Step S410, determining whether the second torque difference is less than the fourth torque difference threshold, if so, proceeding to step S412; if not, proceeding to step S411.

[0081] In this embodiment, the third torque difference threshold and the fourth torque difference threshold can be artificially set, and can be obtained by multiplying the actual torque with the artificially set coefficient, or can be determined by the hardware properties of the range extender and measured by artificial experiments. When the second torque difference is greater than the third torque difference threshold and less than the fourth torque difference threshold, it indicates that the torque of the current range extender is too high, and there is a risk of runaway, but there is still some time before runaway occurs. At this time, countermeasures need to be taken to reduce the torque of the range extender to avoid the torque of the range extender from continuing to rise, so as to avoid the engine driving the motor to generate excessive high voltage electricity to damage the parts in the car; when the second torque difference is greater than the fourth torque difference threshold, it indicates that the torque of the current range extender is already far higher than the normal torque, and it is very likely that runaway will occur at the next moment, or it is possible that runaway has already occurred. When it is determined that runaway is about to occur or has already occurred, emergency measures should be taken for the range extender, and if necessary, the range extender should be stopped to avoid damage to the parts in the car.

[0082] Step S411, determining whether the actual torque difference duration is greater than the actual torque difference duration threshold, if so, proceeding to step S413; if not, determining the safety monitoring information as torque abnormality information.

[0083] In this embodiment, the actual torque difference duration threshold can be set manually, and can be set according to experimental data after testing the hardware. When the actual torque difference duration is greater than the actual torque difference duration threshold, it means that the current actual torque has far exceeded the normal torque range, and emergency measures should be taken in time to shut down the range extender, otherwise the range extender torque is too high and the engine drives the motor to rotate. The power generation is too large, which will cause damage to various parts in the car. When the actual torque difference duration is less than the actual torque difference duration threshold, it means that the current actual torque exceeds the normal torque range. It is very likely that it is a normal fluctuation of the torque or a normal jump of the measured value of the measuring sensor. It cannot be said that the range extender has failed or is about to fail, and there is no need to take emergency measures for the range extender.

[0084] Step S412, determining whether the actual torque difference duration is greater than the actual torque difference duration threshold, if so, determining the safety monitoring information as torque abnormality information; if not, determining the safety monitoring information as torque normal information.

[0085] In this embodiment, the torque abnormality information means that the torque of the range extender has deviated from the normal torque range, but there is still some time before the runaway situation occurs. At this time, it is only necessary to reduce the torque and speed of the range extender without completely shutting down the range extender. Among them, the normal torque range is obtained by experimental measurement of the hardware of the range extender by the staff.

[0086] Step S413: determining the safety monitoring information as torque fault information.

[0087] In this embodiment, the speed fault information means that the torque of the range extender has left the normal torque range, and a runaway situation is about to occur or has already occurred at the next moment. At this time, the torque and speed of the range extender need to be quickly reduced, and the power source of the range extender needs to be completely shut down to avoid damage to parts in the car due to the high pressure caused by the runaway situation.

[0088] The range extender operation safety monitoring method provided in the embodiment of the present application monitors the torque of the range extender in real time. When the range extender is in the starting mode, it is judged whether the actual torque is higher than the normal torque range when it is higher than the starting target torque and starts normally, and it is able to judge whether the torque value higher than the normal torque range is a normal fluctuation of the torque or a normal jump of the sensor measurement value, thereby improving the accuracy of monitoring the abnormal torque situation, and facilitating timely measures to avoid damage to the internal parts of the vehicle when the torque is abnormal. When the range extender is in the power generation mode or the shutdown mode, it is judged whether the actual torque is higher than the normal torque range when it is higher than the power generation target torque and generates power normally, and by judging whether the torque value higher than the normal torque range is a normal fluctuation of the torque or a normal jump of the sensor measurement value, the accuracy of judging the range extender fault is improved, and it is convenient to take emergency measures in time before the range extender is about to run away, so as to avoid damage to the parts of the vehicle due to the runaway situation.

[0089] Figure 5 The flowchart of the implementation method of the range extender operation safety monitoring method provided in the fifth embodiment of the present application is shown, which differs from the fourth embodiment described above in that: Step S501, determine whether the safety monitoring information is torque abnormality information, if so, proceed to step S502; if not, proceed to step S503.

[0090] In this embodiment, the torque abnormality information is used to indicate that the torque of the current range extender has exceeded the normal speed, but has not deviated much. At this time, it is only necessary to reduce the torque and speed of the range extender to avoid the occurrence of runaway.

[0091] Step S502, reducing the torque of the engine of the range extender to within the normal torque range of the engine until the range extender is shut down.

[0092] In this embodiment, the current torque of the range extender has exceeded the normal torque, but has not deviated much. At this time, it is only necessary to reduce the torque of the range extender to avoid the occurrence of runaway, without completely cutting off the power source of the range extender.

[0093] Step S503, determining whether the safety monitoring information is torque fault information, if so, reducing the torque of the engine of the range extender, the speed of the engine of the range extender, and the speed of the motor of the range extender until the range extender stops; if not, the torque of the engine of the range extender, the speed of the engine of the range extender, and the speed of the motor of the range extender are not reduced.

[0094] In this embodiment, when the safety monitoring information shows that it is not torque abnormality information, it may be torque fault information or torque normal information. Torque fault information is used to indicate that the torque of the current range extender has far exceeded the normal torque range. Even if the runaway situation has not occurred at present, the runaway situation is about to occur. Therefore, emergency measures need to be taken for the range extender, that is, the torque of the engine of the range extender, the speed of the engine of the range extender, and the speed of the motor of the range extender are reduced to achieve the reduction of the torque of the range extender while shutting down the engine operation, and driving the engine speed down by reducing the speed of the motor. Otherwise, the high voltage electricity generated by the engine driving the motor to continue to run at a high speed will cause damage to the parts in the car. Normal torque information is used to indicate that the torque of the current range extender has not deviated from the normal speed range, and there is no need to take measures to reduce the torque or shut down the range extender.

[0095] In this embodiment, when the range extender has a torque abnormality in the starting mode, it indicates that the torque has fluctuated abnormally. The torque control of the range extender is unstable and the transmission system may have problems. The measures to be taken may be to reduce the motor speed to shutdown processing, and the cause needs to be checked to prevent further damage to the system and excessive or low torque. When the range extender has a torque failure in the starting mode, it indicates that the range extender has lost control during the starting process. The measures to be taken may be to perform low-voltage power-off processing on the motor, and the cause needs to be checked to avoid stalling when the speed is too low, which may cause overheating and damage to the motor, thereby reducing the risk. When the range extender has abnormal torque in the power generation mode, it indicates that the power generation is unstable during the power generation operation of the range extender. There may be a problem with the operating system. The measures to be taken may be to reduce the torque of the engine and reduce the speed of the motor. The cause needs to be checked to prevent further damage to the system and too high or too low speed; when the range extender has a torque failure in the power generation mode, it means that the range extender is out of control. The measures to be taken may be to cut off the oil and low-voltage electricity of the engine and the low-voltage electricity of the generator. The cause needs to be checked to avoid cylinder loss, violent vibration, shaking, etc. At the same time, it is necessary to avoid the high voltage electricity generated by the range extender running at high speed from damaging parts of the car, or the torque is too low to cause over-discharge of the battery pack, or the torque is too high to cause over-charge of the battery pack. When the range extender has abnormal torque in the shutdown mode, it means that the range extender has abnormal shutdown fluctuations. The measures to be taken may be to cut off the low voltage power of the engine and check the cause to prevent further damage to the system and the runaway situation caused by excessive speed; when the range extender has a torque failure in the shutdown mode, the measures to be taken may be to cut off the low voltage power of the motor and check the cause to prevent further damage to the system and the runaway situation caused by excessive speed.

[0096] The range extender operation safety monitoring method provided in the embodiment of the present application indicates whether the range extender is in an abnormal state according to the safety monitoring information, and takes different measures for the range extender according to different safety monitoring information, so as to avoid the occurrence of runaway situations, thereby ensuring that various parts in the car will not be damaged due to excessive high voltage electricity generated by the motor. When the torque of the range extender is much higher than the normal torque range, and the torque does not decrease after taking measures to reduce the torque, the speed of the motor of the range extender is reduced to drag the engine speed of the range extender to reduce, so that the engine speed of the range extender gradually decreases to the normal speed range, effectively avoiding the damage of various parts of the car due to the high voltage in the car caused by the excessive speed of the range extender.

[0097] Corresponding to the method of the above embodiment, Figure 6 A structural block diagram of a range extender operation safety monitoring device provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown. Figure 6The exemplary range extender operation safety monitoring device may be an execution subject of the range extender operation safety monitoring method provided in the aforementioned first embodiment.

[0098] Reference Figure 6 The range extender operation safety monitoring device includes: An information acquisition module 610 is used to acquire operating parameters, operating parameter duration, and operating mode information of the range extender; An operating parameter threshold calculation module 620, configured to calculate an operating parameter threshold based on the operating mode information and the operating parameters; and The safety monitoring information generating module 630 is used to obtain the safety monitoring information of the range extender according to the operation mode information, operation parameters, operation parameter duration, operation parameter threshold, preset target parameter and preset duration threshold.

[0099] The process of each module in the range extender operation safety monitoring device provided in the embodiment of the present application realizing its own function can be specifically referred to the aforementioned Figure 1 The description of the first embodiment is not repeated here.

[0100] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0101] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0102] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0103] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0104] In addition, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating or suggesting relative importance. It should also be understood that although the terms "first", "second", etc. are used to describe various elements in some embodiments of the present application in the text, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first table can be named as the second table, and similarly, the second table can be named as the first table without departing from the scope of the various described embodiments. The first table and the second table are both tables, but they are not the same table.

[0105] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0106] The range extender operation safety monitoring method provided in the embodiment of the present application can be applied to terminal devices such as mobile phones, tablet computers, wearable devices, vehicle-mounted devices, augmented reality (AR) / virtual reality (VR) devices, laptop computers, ultra-mobile personal computers (UMPC), netbooks, personal digital assistants (PDA), etc. The embodiment of the present application does not impose any restrictions on the specific type of the terminal device.

[0107] Figure 7 Schematic diagram of the structure of a terminal device provided by an embodiment of the present application. Figure 7 As shown, the terminal device 7 of this embodiment includes: at least one processor 70 ( Figure 7 Only one is shown in the figure), a memory 71, wherein the memory 71 stores a computer program 72 that can be run on the processor 70. When the processor 70 executes the computer program 72, the steps in the above-mentioned embodiments of the range extender operation safety monitoring method are implemented, such as Figure 1Alternatively, when the processor 70 executes the computer program 72, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 6 The functions of the information acquisition module 610 to the safety monitoring information generation module 630 are shown.

[0108] The terminal device 7 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device may include, but is not limited to, a processor 70 and a memory 71. Those skilled in the art will appreciate that Figure 7 It is only an example of the terminal device 7 and does not constitute a limitation on the terminal device 7. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include an input sending device, a network access device, a bus, etc.

[0109] The processor 70 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0110] In some embodiments, the memory 71 may be an internal storage unit of the terminal device 7, such as a hard disk or memory of the terminal device 7. The memory 71 may also be an external storage device of the terminal device 7, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal device 7. Further, the memory 71 may include both an internal storage unit and an external storage device of the terminal device 7. The memory 71 is used to store an operating system, an application program, a boot loader (BootLoader), data, and other programs, such as the program code of the computer program. The memory 71 may also be used to temporarily store data that has been sent or is to be sent.

[0111] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0112] An embodiment of the present application also provides a terminal device, which includes at least one memory, at least one processor, and a computer program stored in the at least one memory and executable on the at least one processor, wherein when the processor executes the computer program, the terminal device implements the steps in any of the above-mentioned method embodiments.

[0113] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0114] An embodiment of the present application provides a computer program product. When the computer program product runs on a terminal device, the terminal device can implement the steps in the above-mentioned method embodiments when executing the computer program product.

[0115] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0116] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0117] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0118] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0119] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A range extender operation safety monitoring method, characterized in that: include: Obtaining operating parameters, operating parameter duration, and operating mode information of the range extender; Based on the operation mode information and according to the operation parameters, calculating an operation parameter threshold; Safety monitoring information of the range extender is obtained according to the operating mode information, operating parameters, operating parameter duration, operating parameter threshold, preset target parameters and preset duration threshold.

2. The range extender operation safety monitoring method according to claim 1, characterized in that: The operation mode information includes a startup mode, a power generation mode, and a shutdown mode.

3. The range extender operation safety monitoring method according to claim 2, characterized in that: The operating parameters include actual rotation speed; The operating parameter threshold includes a speed difference threshold; the speed difference threshold includes a first speed difference threshold, a second speed difference threshold, a third speed difference threshold and a fourth speed difference threshold, the first speed difference threshold is smaller than the second speed difference threshold, and the third speed difference threshold is smaller than the fourth speed difference threshold; The target parameters include a startup target speed and a power generation target speed; The operating parameter duration includes the actual speed difference duration; The duration threshold comprises an actual speed difference duration threshold; The safety monitoring information includes abnormal speed information and speed failure information; The step of obtaining the safety monitoring information of the range extender according to the operation mode information, the operation parameter, the operation parameter duration, the operation parameter threshold, the preset target parameter and the preset duration threshold specifically includes: When the operation mode information is the startup mode, calculating the difference between the actual speed and the startup target speed to obtain a first speed difference; When the first speed difference is greater than the first speed difference threshold, determining whether the first speed difference is less than the second speed difference threshold; If so, when the actual speed difference duration is greater than the actual speed difference duration threshold, the safety monitoring information is determined as abnormal speed information; If not, when the actual speed difference duration is greater than the actual speed difference duration threshold, determining the safety monitoring information as speed fault information; When the operation mode information is the power generation mode or the shutdown mode, calculating the difference between the actual speed and the power generation target speed to obtain a second speed difference; When the second speed difference is greater than the third speed difference threshold, determining whether the second speed difference is less than the fourth speed difference threshold; If so, when the actual speed difference duration is greater than the actual speed difference duration threshold, the safety monitoring information is determined as abnormal speed information; If not, when the actual speed difference duration is greater than the actual speed difference duration threshold, the safety monitoring information is determined as speed fault information.

4. The range extender operation safety monitoring method according to claim 3, characterized in that: After the step of obtaining the safety monitoring information of the range extender according to the operating mode information, the operating parameter, the operating parameter threshold, the preset target parameter and the preset duration threshold, the method further includes: When the safety monitoring information is information of abnormal rotation speed, the range extender is shut down; When the safety monitoring information is speed fault information, the engine of the range extender is cut off from fuel; When the speed of the motor of the range extender does not decrease, the motor of the range extender is powered off until the range extender stops.

5. The range extender operation safety monitoring method according to claim 2, characterized in that: The operating parameters also include actual torque; The operating parameter threshold also includes a torque difference threshold; the torque difference threshold includes a first torque difference threshold, a second torque difference threshold, a third torque difference threshold and a fourth torque difference threshold, the first torque difference threshold is smaller than the second torque difference threshold, the third torque difference threshold is smaller than the fourth torque difference threshold; The target parameters also include a starting target torque and a power generation target torque; The operating parameter duration also includes the actual torque difference duration; The duration threshold also includes an actual torque difference duration threshold; The safety monitoring information also includes torque abnormality information and torque fault information; The step of obtaining the safety monitoring information of the range extender according to the operation mode information, the operation parameter, the operation parameter duration, the operation parameter threshold, the preset target parameter and the preset duration threshold further includes: When the operation mode information is the startup mode, calculating the difference between the actual torque and the startup target torque to obtain a first torque difference; When the first torque difference is greater than the first torque difference threshold, determining whether the first torque difference is less than the second torque difference threshold; If so, when the actual torque difference duration is greater than the actual torque difference duration threshold, the safety monitoring information is determined as torque abnormality information; If not, when the actual torque difference duration is greater than the actual torque difference duration threshold, determining the safety monitoring information as torque fault information; When the operation mode information is the power generation mode or the shutdown mode, calculating the difference between the actual torque and the power generation target torque to obtain a second torque difference; When the second torque difference is greater than the third torque difference threshold, determining whether the second torque difference is less than the fourth torque difference threshold; If so, when the actual torque difference duration is greater than the actual torque difference duration threshold, the safety monitoring information is determined as torque abnormality information; If not, when the actual torque difference duration is greater than the actual torque difference duration threshold, the safety monitoring information is determined as torque fault information.

6. The range extender operation safety monitoring method according to claim 5, characterized in that: After the step of obtaining the safety monitoring information of the range extender according to the operating mode information, the operating parameter, the operating parameter threshold, the preset target parameter and the preset duration threshold, the method further includes: When the safety monitoring information is torque abnormality information, the torque of the engine of the range extender is reduced to within the normal torque range of the engine until the range extender is shut down; When the safety monitoring information is torque fault information, the torque of the engine of the range extender, the speed of the engine of the range extender and the speed of the motor of the range extender are reduced until the range extender stops.

7. The range extender operation safety monitoring method according to claim 1, characterized in that: After the step of obtaining the safety monitoring information of the range extender according to the operation mode information, the operation parameter, the operation parameter duration, the operation parameter threshold, the preset target parameter and the preset duration threshold, the step further includes: When the operating parameter is greater than the preset operating limit parameter, the engine of the range extender is cut off from fuel and power, and the output voltage of the range extender is passed to the battery pack.

8. A range extender operation safety monitoring device, characterized in that: include: An information acquisition module, used to obtain operating parameters, operating parameter duration, and operating mode information of the range extender; An operating parameter threshold calculation module, configured to calculate an operating parameter threshold based on the operating mode information and the operating parameters; as well as The safety monitoring information generation module is used to obtain the safety monitoring information of the range extender according to the operation mode information, operation parameters, operation parameter duration, operation parameter threshold, preset target parameters and preset duration threshold.

9. A terminal device, characterized in that: The terminal device includes a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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