Vehicle control method, device, electric vehicle, medium and program product

Abstract

The present application discloses a vehicle control method, device, electric vehicle, medium and program product, which relate to the field of electric vehicle technology. The method comprises: obtaining temperature sensing data corresponding to the drive system; obtaining a drive signal curve corresponding to the temperature sensing data generated by the drive system based on a temperature sensing curve corresponding to the temperature sensing data; determining a target mode for driving the electric vehicle based on the corresponding relationship between the changes in the temperature sensing curve and the drive signal curve; and driving the electric vehicle to operate in the target mode through the drive system. The method enables the drive system to determine the source of the abnormal temperature fault through the temperature signal detected by the built-in temperature sensor of the drive system, and control the driving mode of the vehicle according to different faults. It effectively avoids safety accidents caused by sudden power loss of the vehicle during driving, improves the safety of the entire vehicle, and does not cause damage to the drive system itself.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electric vehicles, and in particular to a vehicle control method, device, electric vehicle, medium and program product. Background Art

[0002] The drive system is the power system of an electric vehicle, which consists of a motor and a motor controller, and is used to indicate and control the driving status of the electric vehicle. The temperature of the drive system is an important information to measure the safety of the vehicle. When the temperature is too high, the vehicle is prone to failure.

[0003] In the related art, when the temperature sensor built into the drive system detects abnormal temperature, the motor controller will cut off the current input to the drive system, causing the drive system to stop working, thereby preventing the drive system from burning due to overheating.

[0004] However, since the temperature sensor itself has a certain failure rate, temperature abnormalities may occur during the operation of the drive system, which does not affect the driving of the car. The relevant technology cannot determine whether the temperature abnormality is in the drive system or the temperature sensor. Summary of the invention

[0005] The embodiments of the present application provide a vehicle control method, device, electric vehicle, medium and program product, which enable the drive system to determine the source of abnormal temperature faults and control the vehicle's driving mode according to different faults. The technical solution is as follows:

[0006] In one aspect, a vehicle control method is provided, which is applied to an electric vehicle, and the method comprises:

[0007] Acquiring temperature sensing data corresponding to a drive system, wherein the temperature sensing data is data detected by a temperature sensor connected to the drive system, and the drive system is used to drive the operation of the electric vehicle;

[0008] Based on a temperature sensing curve corresponding to the temperature sensing data, acquiring a driving signal curve generated by the driving system and corresponding to the temperature sensing data, wherein the driving signal curve is used to represent a change feature corresponding to the temperature sensing curve;

[0009] Determining a target mode for driving the electric vehicle based on a corresponding relationship between changes in the temperature sensing curve and the driving signal curve;

[0010] The electric vehicle is driven to operate in the target mode by the driving system.

[0011] In another aspect, a vehicle control device is provided, the device comprising:

[0012] An acquisition module, which acquires temperature sensing data corresponding to the drive system, wherein the temperature sensing data is data detected by a temperature sensor connected to the drive system, and the drive system is used to drive the operation of the electric vehicle;

[0013] The acquisition module acquires a drive signal curve corresponding to the temperature sensing data and generated by the drive system based on a temperature sensing curve corresponding to the temperature sensing data, wherein the drive signal curve is used to represent a change feature corresponding to the temperature sensing curve;

[0014] A determination module, which determines a target mode for driving the electric vehicle based on a corresponding relationship between changes in the temperature sensing curve and the driving signal curve;

[0015] A driving module drives the electric vehicle to operate in the target mode through the driving system.

[0016] On the other hand, an electric vehicle is provided, which includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement a vehicle control method as described in any of the above-mentioned embodiments of the present application.

[0017] On the other hand, a computer-readable storage medium is provided, in which at least one instruction, at least one program, a code set or an instruction set is stored, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement a vehicle control method as described in any of the above-mentioned embodiments of the present application.

[0018] On the other hand, a computer program product or a computer program is provided, the computer program product or the computer program comprising computer instructions, the computer instructions being stored in a computer-readable storage medium. A processor of an electric vehicle reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electric vehicle executes the vehicle control method described in any one of the above embodiments.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0020] The drive system uses the temperature signal detected by its built-in temperature sensor to determine the source of the temperature abnormality and control the vehicle's driving mode according to different faults. When it is determined that the temperature abnormality is due to a fault in the temperature sensor itself, the vehicle is controlled to drive in a speed limit mode; when the temperature abnormality is due to a real overheating of the drive system, the vehicle is controlled to drive in a low-speed mode. When a temperature abnormality is detected, the vehicle's driving mode is changed instead of directly stopping the drive system, effectively avoiding safety accidents caused by sudden power loss during driving, improving the safety of the entire vehicle, and at the same time, not causing damage to the drive system itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments 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 creative work.

[0022] Figure 1 is a schematic diagram of components of a drive system provided by an exemplary embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a motor controller receiving a temperature signal and controlling a motor in a drive system provided by an exemplary embodiment of the present application;

[0024] Figure 3 is a flow chart of a vehicle control method provided by an exemplary embodiment of the present application;

[0025] Figure 4 is a schematic diagram of a smoothly changing temperature sensing curve provided by an exemplary embodiment of the present application;

[0026] Figure 5 is a schematic diagram of a temperature sensing curve that undergoes a jump provided by an exemplary embodiment of the present application;

[0027] Figure 6 It is a schematic diagram of a signal corresponding to a driving signal curve provided by an exemplary embodiment of the present application being at a low level;

[0028] Figure 7 It is a schematic diagram of a signal corresponding to a driving signal curve provided by an exemplary embodiment of the present application changing from a low level to a high level;

[0029] Figure 8 is a flow chart of a method for driving a vehicle by a driving system provided by an exemplary embodiment of the present application;

[0030] Fig. 9is a flow chart of a method for driving a vehicle by a driving system provided by another exemplary embodiment of the present application;

[0031] Fig.10 is a schematic diagram of driving an electric vehicle in a normal driving mode provided by an exemplary embodiment of the present application;

[0032] Fig.11 is a schematic diagram of driving an electric vehicle in a speed-limited driving mode provided by an exemplary embodiment of the present application;

[0033] Fig.12 is a schematic diagram of driving an electric vehicle in a low-speed driving mode provided by another exemplary embodiment of the present application;

[0034] Fig.13 is a schematic diagram of driving an electric vehicle in a low-speed driving mode provided by another exemplary embodiment of the present application;

[0035] Fig.14 is a schematic diagram of driving an electric vehicle in a speed-limited driving mode and a low-speed driving mode in sequence according to an exemplary embodiment of the present application;

[0036] Fig.15 is a schematic diagram of driving an electric vehicle in a speed-limited driving mode provided by another exemplary embodiment of the present application;

[0037] Fig.16 is a schematic diagram of driving an electric vehicle in a low-speed driving mode and a limited-speed driving mode in sequence provided by another exemplary embodiment of the present application;

[0038] Fig.17 It is a timing diagram of a driving system provided by an exemplary embodiment of the present application for determining the source of temperature anomaly and driving the electric vehicle in different target modes;

[0039] Fig.18 is a structural block diagram of a vehicle control device provided by an exemplary embodiment of the present application;

[0040] Fig.19 It is a structural block diagram of an electric vehicle provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0042] The drive system is one of the most important systems of electric vehicles. The performance of electric vehicles is mainly determined by their drive system. The drive system of electric vehicles is mainly composed of motors, motor controllers, etc. The motor controller is an integrated circuit that actively controls the motor to work in the set direction, speed, angle, and response time. The motor controller further drives the electric vehicle by controlling the motor.

[0043] The safety of the drive system is directly related to the safety of electric vehicles, and the temperature of the drive system is an important factor closely related to the safety of the drive system. In related technologies, the drive system generally uses a built-in temperature sensor in the motor and motor controller to monitor the temperature. When the built-in temperature sensor detects abnormal temperature, the motor controller cuts off the current input of the motor, causing the entire drive system to stop working, thereby preventing the drive system from burning out due to excessive temperature.

[0044] A temperature sensor is a sensor that can sense temperature and convert it into a usable output signal. Temperature sensors are the core of temperature measuring instruments and come in a wide variety of types. They can be divided into contact and non-contact types based on the measurement method, and thermal resistors and thermocouples based on the sensor material and electronic component characteristics. The temperature sensor connected to the drive system is used to monitor the temperature of the drive system and convert its temperature data into a signal, which is then output to the drive system.

[0045] However, the temperature sensor connected to the drive system also has a certain failure rate. That is, when the temperature sensor connected to the drive system detects a temperature abnormality, it may be caused by a failure of the temperature sensor itself, and the drive system can still work normally and is not affected. In the related art, after receiving the temperature abnormality signal sent by the connected temperature sensor, the drive system directly stops working without determining the direct source of the temperature abnormality. This temperature abnormality handling method can easily cause the electric vehicle to lose power and cause safety accidents such as rear-end collisions.

[0046] In the embodiment of the present application, after the temperature sensor connected to the drive system detects a temperature abnormality, it sends a temperature signal to the drive system. The drive system determines based on the temperature signal whether the source of the temperature abnormality is overheating of the drive system itself or a temperature abnormality caused by a fault in the temperature sensor itself, and controls the vehicle's driving mode according to different fault sources.

[0047] In the process of determining the source of the abnormal temperature fault according to the temperature signal, the drive system generates a drive signal inside the drive system after receiving the temperature signal sent by the temperature sensor connected to the drive system, and determines the source of the abnormal temperature fault based on the drive signal. If the source of the fault is caused by the fault of the temperature sensor connected to the drive system itself, the drive system drives the vehicle in the first mode; if the source of the fault is caused by the overheating of the drive system itself, the drive system drives the vehicle in the second mode; if the temperature sensor connected to the drive system does not detect the abnormal temperature, and the drive system and the connected temperature sensor are normal, the drive system drives the vehicle in the third mode, that is, the vehicle drives normally.

[0048] Indicative, such as Figure 1 As shown, the driving system 100 of the electric vehicle is mainly composed of a motor controller 110 and a motor 120. The motor controller 110 is connected to a motor controller temperature sensor 111, and the motor 120 is connected to a motor temperature sensor 121. The motor controller temperature sensor 111 and the motor temperature sensor 121 together constitute a temperature sensor connected to the driving system 100.

[0049] Indicative, such as Figure 2 As shown, the motor controller temperature sensor 111 is used to monitor the temperature data of the motor controller 110, and the motor temperature sensor 121 is used to monitor the temperature data of the motor 120. The motor controller temperature sensor 111 and the motor temperature sensor 121 respectively send the monitored temperature data to the motor controller 110 in the form of temperature signals. After receiving the temperature signal, the motor controller 110 determines the fault source of the temperature abnormality based on the temperature signal, and determines the driving mode of the vehicle based on the fault source. The motor controller 110 sends a corresponding control signal to the motor 120 for control, so that the drive system 100 drives the vehicle to drive in the corresponding mode.

[0050] In combination with the above-mentioned noun introduction and application scenarios, the vehicle control method provided by the present application is described. The method can be applied to electric vehicles. In the embodiments of the present application, the method is applied to electric vehicles as an example for description. Figure 3 A flow chart of a vehicle control method provided by an exemplary embodiment of the present application is shown as follows: Figure 3 As shown, the method includes:

[0051] Step 301, obtaining temperature sensing data corresponding to the drive system.

[0052] The temperature sensing data is data detected by a temperature sensor connected to a drive system, and the drive system is used to drive the operation of the electric vehicle.

[0053] The temperature sensor connected to the drive system is used to detect the real-time temperature data of the drive system during the driving of the electric vehicle, and send the temperature data to the drive system in the form of a signal. The drive system obtains temperature sensing data based on the temperature signal sent by the temperature sensor, and then determines in real time whether the temperature of the drive system is abnormal.

[0054] If a temperature abnormality occurs, the drive system will adjust the driving mode of the electric vehicle according to the specific temperature abnormality; if no temperature abnormality occurs, the drive system will control the electric vehicle to continue normal driving.

[0055] Set the temperature abnormality threshold of the drive system. When the temperature sensor detects that the real-time temperature data of the drive system exceeds the temperature abnormality threshold, it indicates that the temperature of the drive system is abnormal.

[0056] Optionally, the temperature threshold of the drive system is A degrees Celsius, and the real-time temperature detected by the temperature sensor connected to the drive system is B degrees Celsius. At this time, B degrees Celsius exceeds the temperature abnormality threshold A degrees Celsius, then the real-time temperature of the drive system is abnormal.

[0057] It is worth noting that the temperature sensing data of the drive system can be obtained by any type of temperature sensor, and the temperature abnormality threshold of the drive system can be any unit and any value; the real-time temperature data detected by the temperature sensor connected to the drive system can be arbitrary; this embodiment does not limit this.

[0058] Step 302: Based on the temperature sensing curve corresponding to the temperature sensing data, a driving signal curve generated by a driving system and corresponding to the temperature sensing data is obtained.

[0059] The driving signal curve generated by the driving system is used to represent the change characteristics corresponding to the temperature sensing curve.

[0060] During the driving of the electric vehicle, the temperature detected by the temperature sensor connected to the drive system changes in real time, that is, the temperature sensing curve corresponding to the temperature sensing data of the drive system also changes in real time.

[0061] The drive signal curve generated by the drive system based on the temperature sensing curve corresponding to the temperature sensing data is used to enable the drive system to determine the fault source of the abnormal temperature.

[0062] Optionally, the fault source of the abnormal temperature of the drive system includes but is not limited to at least one of the following sources:

[0063] 1. The temperature of the drive system itself is abnormal;

[0064] 2. The temperature sensor connected to the drive system is faulty;

[0065] Optionally, when the temperature sensing curve changes smoothly, it means that the temperature sensor connected to the drive system is not faulty, and when the temperature sensing curve jumps, it means that the temperature sensor connected to the drive system is faulty.

[0066] Indicative, such as Figure 4 As shown, Figure 4 It is a schematic diagram of a temperature sensing curve 400 that changes steadily. The temperature value corresponding to the temperature sensing curve 400 changes steadily and does not exceed a temperature threshold 410 .

[0067] Indicative, such as Figure 5 As shown, Figure 5 It is a schematic diagram of a temperature sensing curve 500 that undergoes a jump. The temperature sensing curve 500 undergoes a jump at point A. After the temperature value corresponding to the temperature sensing curve 500 exceeds the temperature threshold 510 at point A, it is maintained at a fixed temperature value.

[0068] It is worth noting that the driving signal curve generated by the driving system can be of any shape, and the source of the abnormal temperature fault of the driving system can be any; the way in which the driving system determines the source of the abnormal temperature fault based on the driving signal curve can be any; the way in which the temperature sensor connected to the driving system is determined to have a fault based on the temperature sensing curve can be any; the node at which the temperature sensing curve jumps can be any, and the form of the smooth change of the temperature sensing curve can be any; this embodiment does not limit this.

[0069] Step 303 : determining a target mode for driving the electric vehicle based on the corresponding relationship between the temperature sensing curve and the driving signal curve.

[0070] After the drive system generates a drive signal curve based on the temperature sensing curve, the fault source of the abnormal temperature of the drive system can be determined based on the corresponding relationship between the changes in the temperature sensing curve and the drive signal curve, and the target mode for driving the electric vehicle can be determined based on different fault sources.

[0071] Optionally, when the temperature of the drive system is abnormal, the drive signal curve generated by the drive system may be expressed in the following forms, including but not limited to:

[0072] 1. When the temperature of the drive system itself is not abnormal and the temperature sensor connected to the drive system itself is not faulty, the drive signal curve is a straight line that sinks relative to the high level;

[0073] 2. When the temperature of the drive system itself is abnormal and the temperature sensor connected to the drive system itself is not faulty, the curve of the drive signal is still a straight line that sinks relative to the high level;

[0074] 3. When the temperature of the drive system itself is not abnormal, but the temperature sensor connected to the drive system fails, the curve of the drive signal is a rising edge curve that changes from a low level to a high level;

[0075] 4. When the temperature of the drive system itself is abnormal and the temperature sensor connected to the drive system also fails, the curve of the drive signal is still a rising edge curve that changes from a low level to a high level;

[0076] The straight line that sinks relative to the high level means that the signal corresponding to the driving signal curve is at a low level, and the rising edge curve that changes from a low level to a high level means that the signal corresponding to the driving signal curve changes from a low level to a high level.

[0077] Indicative, such as Figure 6 As shown, Figure 6 It is a schematic diagram that the signal corresponding to the driving signal curve is at a low level, that is, the driving signal curve is a schematic diagram of a curve that sinks relative to a high level. The driving signal curve 610 does not jump and remains at a low level.

[0078] Indicative, such as Figure 7 As shown, Figure 7 The driving signal curve 710 is a schematic diagram of the signal corresponding to the driving signal curve changing from a low level to a high level, that is, the driving signal curve is a schematic diagram of a rising edge curve changing from a low level to a high level. The driving signal curve 710 jumps at A, changing from a low level state to a high level state.

[0079] Optionally, when the temperature of the drive system is normal, the drive signal curve is a straight line that sinks relative to the high level. When the temperature of the drive system is abnormal, observe the change of the drive signal curve, and determine the source of the abnormal temperature of the drive system based on the change of the drive signal curve: when the drive signal curve does not change, it means that the temperature of the drive system itself is abnormal; when the drive signal curve changes, it means that the temperature sensor connected to the drive system itself is faulty.

[0080] When the temperature of the drive system is abnormal, the drive system determines the fault source of the abnormal temperature of the drive system according to the change of the drive signal curve, and determines the target mode for driving the electric vehicle according to the fault source.

[0081] Optionally, the target mode for driving the electric vehicle includes but is not limited to the following modes:

[0082] 1. The first mode: limited power driving mode;

[0083] 2. Second mode: low power driving mode;

[0084] 3. The third mode: normal power driving mode;

[0085] The maximum allowable output power corresponding to the first mode is generally set to the rated power at which the drive system can operate for a long time, that is, the maximum allowable output power of the drive system is limited from the maximum power to the rated power.

[0086] The maximum allowable output power corresponding to the second mode is generally set to the minimum power at which the drive system can operate for a long time, that is, the maximum allowable output power of the drive system is limited from the maximum power to the minimum power.

[0087] The maximum allowable output power corresponding to the third mode is generally set to the maximum power at which the drive system can operate for a long time, that is, the maximum allowable output power of the drive system is maintained at the maximum power.

[0088] That is, the maximum power value output by the drive system in the third mode is greater than the maximum power value output by the drive system in the first mode, and the maximum power value output by the drive system in the first mode is greater than the maximum power value output by the drive system in the second mode.

[0089] Among them, the above-mentioned target modes all drive the electric vehicle by changing the power output by the drive system.

[0090] It is worth noting that when the temperature of the drive system is abnormal, the expression form of the drive signal curve generated by the drive system can be arbitrary; when the temperature of the drive system is abnormal, the expression form of the drive signal curve generated by the drive system can be arbitrary; the method of judging the source of the abnormal temperature of the drive system based on the change of the drive signal curve can be arbitrary; the target mode for driving the electric vehicle can include any type of target mode; the method in which the drive system drives the electric vehicle with different target modes can be arbitrary; this embodiment does not limit this.

[0091] Step 304 : driving the electric vehicle to operate in a target mode through the driving system.

[0092] The drive system determines whether the temperature of the drive system is abnormal and the source of the abnormal temperature of the drive system according to the drive signal curve, and determines a target mode for driving the electric vehicle, and drives the electric vehicle based on the target mode.

[0093] Optionally, the drive system controls the speed or output power of the electric vehicle during driving based on the target mode.

[0094] It is worth noting that the drive system controls the vehicle according to different situations, and the manner in which the drive system controls the operation of the electric vehicle based on the target mode is arbitrary and is not limited in this embodiment.

[0095] In summary, the method provided in this embodiment enables the drive system to determine the source of the temperature abnormality fault through the temperature signal detected by the built-in temperature sensor of the drive system, and control the driving mode of the vehicle according to different faults. When the temperature abnormality is detected, the vehicle driving mode is changed instead of directly stopping the drive system, which effectively avoids safety accidents caused by sudden power loss during driving, improves the safety of the whole vehicle, and does not cause damage to the drive system itself.

[0096] In an optional embodiment, when the temperature of the drive system is normal, the drive system drives the electric vehicle in the original mode; when the temperature of the drive system is abnormal, the drive system will make a judgment based on the temperature sensing data sent by the temperature sensor connected to it, determine the source of the abnormal temperature fault of the drive system, determine the target mode, and drive the electric vehicle. Figure 8 FIG. 1 is a flow chart of a method for driving a vehicle by a driving system provided by another exemplary embodiment of the present application. The method is described by taking an electric vehicle as an example. Figure 8 As shown, the above step 303 can also be implemented as the following steps:

[0097] Step 3031 , in response to the temperature value corresponding to the temperature sensing curve being greater than the temperature threshold, a target mode for driving the electric vehicle is determined based on a jump condition of the driving signal curve.

[0098] When a temperature sensing curve corresponding to the temperature sensing data detected by the temperature sensor jumps, if the temperature sensor connected to the drive system itself fails, a drive signal curve generated by the drive system based on the temperature sensing curve will also jump.

[0099] During the driving process of the vehicle, the temperature of the driving system changes in real time, so the temperature sensing curve corresponding to the temperature sensing data detected by the temperature sensor is also a real-time changing curve.

[0100] Optionally, when the temperature sensing curve jumps, the temperature sensing data corresponding to the temperature sensing curve remains unchanged after the temperature sensing curve jumps, which indicates that the temperature sensor detects a temperature anomaly in the drive system. The drive signal curve generated by the drive system based on the temperature sensing curve is used for the drive system to determine the source of the temperature anomaly fault in the drive system, and determine the target mode for driving the electric vehicle according to different fault sources.

[0101] It is worth noting that in the above method, the jump situation of the driving signal curve is determined according to the jump situation of the temperature sensing curve, and the source of the fault of the driving system temperature system is further judged according to the jump situation of the driving signal curve. In some embodiments, the method of judging the source of the fault of the driving system temperature system can be arbitrary, and this embodiment does not limit this.

[0102] Step 3032: In response to a jump in the driving signal curve at a node where the temperature value is greater than the temperature threshold, determine to drive the electric vehicle in the first mode.

[0103] When the temperature value detected by the temperature sensor connected to the drive system exceeds the temperature threshold, it indicates that the temperature of the drive system is abnormal.

[0104] When the temperature sensing curve jumps at a node where the temperature value is greater than the temperature threshold, the driving signal curve also jumps at a node where the temperature value is greater than the temperature threshold. At this time, the source of the abnormal temperature of the driving system is a fault of the temperature sensor connected to the driving system itself, and the driving system determines to drive the electric vehicle in the first mode.

[0105] When the temperature sensor connected to the drive system fails, the target mode for driving the electric vehicle is the first mode, i.e., the power-limited driving mode. The maximum allowable output power corresponding to the first mode is generally set to the rated power at which the drive system can run for a long time, i.e., the maximum allowable output power of the drive system is limited from the maximum power to the rated power.

[0106] Among them, the rated power and the maximum allowable output power are power values ​​preset in advance.

[0107] It is worth noting that when the electric vehicle is driven in the first mode, the first mode may be any mode, the rated power and the maximum allowable output power may be any values, and the temperature threshold may be any value; this is not limited in this embodiment.

[0108] Step 3033 , in response to the driving signal curve remaining unchanged when the temperature value is greater than the temperature threshold, determining to drive the electric vehicle in the second mode.

[0109] When the temperature sensing curve jumps at a node where the temperature value is greater than the temperature threshold, the drive signal curve remains unchanged at the node where the temperature value is greater than the temperature threshold, that is, the drive signal curve does not jump. At this time, the fault source of the abnormal temperature of the drive system is the abnormal temperature of the drive system itself, and the drive system determines to drive the electric vehicle in the second mode.

[0110] When the temperature of the drive system itself is abnormal, the target mode for driving the electric vehicle is the second mode, i.e., the low-power driving mode. The maximum allowable output power corresponding to the second mode is generally set to the minimum power at which the drive system can run for a long time, that is, the maximum allowable output power of the drive system is limited from the maximum power to the minimum power.

[0111] The driving power of the electric vehicle in the first mode is greater than the driving power of the electric vehicle in the second mode. The minimum power and the maximum allowable output power are power values ​​preset in advance.

[0112] It is worth noting that when the electric vehicle is driven in the second mode, the second mode can be any mode, the minimum power and the maximum allowable output power can be any values, and the temperature threshold can be any value; this is not limited in this embodiment.

[0113] Step 3034: in response to the temperature value corresponding to the temperature sensing curve being lower than the temperature threshold, a target mode for driving the electric vehicle is determined based on the jump condition of the driving signal curve.

[0114] When the temperature value corresponding to the temperature sensing data detected by the temperature sensor is lower than the temperature threshold, the temperature of the drive system is normal.

[0115] If the temperature value corresponding to the temperature sensing data detected by the temperature sensor is lower than the temperature threshold, the temperature sensor connected to the drive system itself has other faults, and the temperature sensing curve corresponding to the temperature sensing data detected by the temperature sensor will also jump. Among them, other faults of the temperature sensor connected to the drive system are different from the abnormal temperature fault of the temperature sensor.

[0116] Optionally, when the temperature sensing curve jumps, if the temperature sensing data corresponding to the temperature sensing curve remains unchanged after the temperature sensing curve jumps, it means that other faults occur in the temperature sensor itself.

[0117] It is worth noting that the type of failure of the temperature sensor connected to the drive system itself can be any. After the temperature sensor fails, the temperature sensing curve corresponding to the temperature sensing data detected by the temperature sensor can also be in any form; this embodiment does not limit this.

[0118] Step 3035 , in response to a jump in the driving signal curve at a node where the temperature value is lower than the temperature threshold, determining to drive the electric vehicle in the first mode.

[0119] Among them, the temperature value corresponding to the temperature sensing data detected by the temperature sensor connected to the drive system is lower than the temperature threshold, and the temperature of the drive system is normal. When other faults occur in the temperature sensor connected to the drive system itself, the temperature sensing curve corresponding to the temperature sensing data detected by the temperature sensor jumps.

[0120] Optionally, if a drive signal curve generated by the drive system based on the temperature sensing curve jumps, then based on the presence of a jump in the drive signal curve at a node where the temperature value is lower than the temperature threshold, it is determined that the drive system has not failed, but other faults have occurred in the temperature sensor connected to the drive system, and it is determined that the electric vehicle is driven in the first mode, that is, the electric vehicle is driven in the limited power driving mode.

[0121] The maximum allowable output power corresponding to the first mode is generally set to the rated power at which the drive system can operate for a long time, that is, the maximum allowable output power of the drive system is limited from the maximum power to the rated power.

[0122] Among them, the rated power and the maximum allowable output power are power values ​​preset in advance.

[0123] It is worth noting that the type of fault in the temperature sensor connected to the drive system itself can be arbitrary, and the method of determining the source of the drive system fault based on the jump in the drive signal curve generated by the drive system can be arbitrary; this embodiment does not limit this.

[0124] Step 3036: In response to the driving signal curve remaining unchanged when the temperature value is lower than the temperature threshold, determining to drive the electric vehicle in the third mode.

[0125] The temperature value corresponding to the temperature sensing data detected by the temperature sensor connected to the drive system is lower than the temperature threshold, and the temperature of the drive system is normal.

[0126] The driving signal curve remains unchanged when the temperature value is lower than the temperature threshold, that is, the driving signal curve does not jump when the temperature value detected by the temperature sensor is lower than the temperature threshold, which means that the temperature sensing curve corresponding to the temperature value detected by the temperature sensor connected to the driving system does not jump.

[0127] At this time, the drive system is normal: the drive system itself has not failed, and the temperature sensor connected to the drive system has not failed either.

[0128] When the drive system is normal, the target mode for driving the electric vehicle is the third mode, i.e., the normal power driving mode. The maximum allowable output power corresponding to the third mode is generally set to the maximum power that the drive system can run for a long time, i.e., the maximum allowable output power of the drive system is still the maximum power set initially.

[0129] The driving power of the electric vehicle in the third mode is greater than the driving power of the electric vehicle in the first mode.

[0130] It is worth noting that when the electric vehicle is driven in the third mode, the third mode may be any mode and the maximum power may be any value, which is not limited in this embodiment.

[0131] It is worth noting that the operation performed in the above-mentioned step 3031 and the operation performed in step 3034 are parallel, that is, the operation performed in step 3031 and the operation performed in step 3034 are performed simultaneously; that is, after executing the operation in step 302, the operation in step 3031 and the operation in step 3034 are performed simultaneously.

[0132] It is worth noting that the operation performed in the above-mentioned step 3032 and the operation performed in step 3033 are parallel, that is, the operation performed in step 3032 and the operation performed in step 3033 are performed simultaneously; that is, after executing the operation in step 3031, the operation in step 3032 and the operation in step 3033 are performed simultaneously.

[0133] It is worth noting that the operation performed in the above-mentioned step 3035 and the operation performed in step 3036 are parallel, that is, the operation performed in step 3035 and the operation performed in step 3036 are performed simultaneously; that is, after executing the operation in step 3034, the operation in step 3035 and the operation in step 3036 are performed simultaneously.

[0134] In summary, the method provided in this embodiment enables the drive system to determine the source of the temperature abnormality fault through the temperature signal detected by the built-in temperature sensor of the drive system, and control the driving mode of the vehicle according to different faults. When the temperature abnormality is detected, the vehicle driving mode is changed instead of directly stopping the drive system, which effectively avoids safety accidents caused by sudden power loss during driving, improves the safety of the whole vehicle, and does not cause damage to the drive system itself.

[0135] The method provided in this embodiment determines the target mode for driving the electric vehicle based on the corresponding relationship between the temperature sensing curve corresponding to the temperature value detected by the temperature sensor connected to the drive system and the change of the drive signal curve. Considering that the temperature value corresponding to the temperature sensing curve is greater than the temperature threshold, the target mode for driving the electric vehicle is determined based on the jump of the drive signal curve. By changing the target mode of vehicle driving instead of directly stopping the drive system, safety accidents caused by sudden power loss of the vehicle during driving are effectively avoided, thereby improving the safety of the entire vehicle and preventing damage to the drive system itself.

[0136] The method provided in this embodiment takes into account the jump conditions of the driving signal curve under different circumstances when the temperature value corresponding to the temperature sensing curve is greater than the temperature threshold, and determines the target mode for driving the electric vehicle. By changing the target mode of the vehicle driving rather than directly stopping the driving system, safety accidents caused by sudden power loss of the vehicle during driving are effectively avoided, thereby improving the safety of the entire vehicle.

[0137] The method provided in this embodiment takes into account the case where the temperature value corresponding to the temperature sensing curve is lower than the temperature threshold, and determines the target mode for driving the electric vehicle based on the jump of the driving signal curve. By changing the target mode of vehicle driving rather than directly stopping the driving system, safety accidents caused by sudden power loss during driving of the vehicle are effectively avoided, thereby improving the safety of the entire vehicle and preventing damage to the driving system itself.

[0138] The method provided in this embodiment takes into account the jump conditions of the driving signal curve under different circumstances when the temperature value corresponding to the temperature sensing curve is lower than the temperature threshold, and determines the target mode for driving the electric vehicle. By changing the target mode of the vehicle driving rather than directly stopping the driving system, safety accidents caused by sudden power loss of the vehicle during driving are effectively avoided, thereby improving the safety of the entire vehicle.

[0139] In some optional embodiments, the drive system includes different drive components, each drive component is connected to its own temperature sensor, and these temperature sensors together constitute the temperature sensor connected to the drive system, and the temperature sensing data collected by each temperature sensor represents the temperature value of different drive components included in the drive system, and each temperature sensing data has its corresponding temperature sensing curve. The drive system determines the source of the abnormal temperature fault of the drive system based on these temperature sensing curves, determines the target mode, and drives the electric vehicle. In the embodiment of the present application, the drive system includes a motor and a motor controller as an example for explanation, wherein the motor is connected to a first temperature sensor, and the motor controller is connected to a second temperature sensor. Fig. 9 FIG. 1 is a flow chart of a method for driving a vehicle by a driving system provided by another exemplary embodiment of the present application. The method is described by taking an electric vehicle as an example. Fig. 9 As shown, the method comprises the following steps:

[0140] Step 901: Acquire first temperature sensing data acquired by a first temperature sensor connected to a motor and second temperature sensing data acquired by a second temperature sensor connected to a motor controller.

[0141] Among them, the driving system includes a motor and a motor controller, and the motor controller is used to control the motor and then drive the electric vehicle.

[0142] In the driving system, a first temperature sensor is connected to the motor to detect the temperature value of the motor during the driving process of the electric vehicle, that is, the first temperature sensor connected to the motor collects and obtains first temperature sensing data. Based on the first temperature sensing data, a first temperature sensing curve of the corresponding first temperature sensor can be obtained, and the motor controller generates a corresponding first driving signal curve in the motor controller based on the first temperature sensing curve.

[0143] When the temperature of the motor is abnormal, the motor controller determines the source of the abnormal temperature fault of the motor based on the first drive signal curve, wherein the source of the abnormal temperature fault of the motor includes but is not limited to the following sources:

[0144] 1. The motor's own temperature is abnormal;

[0145] 2. The first temperature sensor connected to the motor is faulty;

[0146] In the driving system, a second temperature sensor is connected to the motor controller to detect the temperature value of the motor controller during the driving process of the electric vehicle, that is, the second temperature sensor connected to the motor controller collects and obtains second temperature sensing data. Based on the second temperature sensing data, a second temperature sensing curve of the corresponding second temperature sensor can be obtained, and the motor controller generates a corresponding second driving signal curve in the motor controller based on the second temperature sensing curve.

[0147] When the temperature of the motor controller is abnormal, the motor controller determines the source of the abnormal temperature fault of the motor controller based on the second drive signal curve, wherein the source of the abnormal temperature fault of the motor controller includes but is not limited to the following sources:

[0148] 1. The temperature of the motor controller itself is abnormal;

[0149] 2. The second temperature sensor connected to the motor controller is faulty;

[0150] The temperature sensing data of the driving system includes first temperature sensing data collected by a first temperature sensor connected to the motor, and second temperature sensing data collected by a second temperature sensor connected to the motor controller; the first temperature sensing data corresponds to a first temperature sensing curve and a first driving signal curve output by the motor; the second temperature sensing data corresponds to a second temperature sensing curve and a second driving signal curve output by the motor controller.

[0151] The first temperature sensing data and the second temperature sensing data corresponding to the driving system are obtained, that is, the first temperature sensing data corresponding to the motor and the second temperature sensing data corresponding to the motor controller are obtained.

[0152] It is worth noting that the drive system may include other drive components besides the motor and the motor controller; the first temperature sensor connected to the motor and the second temperature sensor connected to the motor controller may be of any type; the drive system may include other temperature sensors besides the first temperature sensor and the second temperature sensor; the source of the abnormal temperature failure of the motor may be arbitrary, and the source of the abnormal temperature failure of the motor controller may be arbitrary; this embodiment does not limit this.

[0153] Step 902 : Based on a first temperature sensing curve corresponding to the first temperature sensing data and a second temperature sensing curve corresponding to the second temperature sensing data, a first driving signal curve corresponding to the first temperature sensing data and a second driving signal curve corresponding to the second temperature sensing data generated by a driving system are obtained.

[0154] The first drive signal curve generated by the motor controller is used to represent the change characteristics of the first temperature sensing curve corresponding to the first temperature sensor connected to the motor. The second drive signal curve generated by the motor controller is used to represent the change characteristics of the second temperature sensing curve corresponding to the second temperature sensor connected to the motor controller.

[0155] During the driving of the electric vehicle, the temperature detected by the temperature sensor connected to the drive system changes in real time, that is, the temperature sensing curve corresponding to the temperature sensing data of the drive system also changes in real time.

[0156] Optionally, in the drive system, the temperature detected by the first temperature sensor connected to the motor changes in real time, that is, the first temperature sensing curve corresponding to the first temperature sensing data also changes in real time.

[0157] Optionally, in the drive system, the temperature detected by the second temperature sensor connected to the motor controller changes in real time, that is, the second temperature sensing curve corresponding to the second temperature sensing data also changes in real time.

[0158] It is worth noting that the first drive signal curve and the second drive signal curve generated by the motor controller can be of any shape; the way in which the motor controller determines the source of the abnormal temperature fault in the drive system based on the first drive signal curve and the second drive signal curve can be arbitrary; the way in which the first temperature sensor and the second temperature sensor fault are determined based on the first temperature sensor curve and the second temperature sensor curve can be arbitrary; this embodiment does not limit this.

[0159] Step 903 : determining a target mode for driving the electric vehicle based on a change correspondence relationship between the first temperature sensing curve and the first driving signal curve, and a change correspondence relationship between the second temperature sensing curve and the second driving signal curve.

[0160] After the motor controller in the drive system generates the first drive signal curve and the second drive signal curve based on the first temperature sensing curve and the second temperature sensing curve, it can determine the fault source of the abnormal temperature of the drive system based on the corresponding relationship between the changes of the first temperature sensing curve and the first drive signal curve, and the corresponding relationship between the changes of the second temperature sensing curve and the second drive signal curve, and determine the target mode for driving the electric vehicle based on different fault sources.

[0161] Optionally, when the temperature of the drive system is abnormal, the first drive signal curve generated by the motor controller in the drive system may be expressed in the following forms, but is not limited to:

[0162] 1) When the temperature of the motor itself is not abnormal and the first temperature sensor connected to the motor itself is not faulty, the first drive signal curve is a straight line that sinks relative to the high level;

[0163] 2) When the temperature of the motor itself is abnormal and the first temperature sensor connected to the motor itself is not faulty, the curve of the first drive signal is still a straight line that sinks relative to the high level;

[0164] 3) When the temperature of the motor itself is not abnormal, but the first temperature sensor connected to the motor fails, the curve of the first drive signal is a rising edge curve that changes from a low level to a high level;

[0165] 4) When the temperature of the motor itself is abnormal and the first temperature sensor connected to the motor also fails, the curve of the first drive signal is still a rising edge curve that changes from a low level to a high level;

[0166] Optionally, when the temperature of the drive system is abnormal, the expression form of the second drive signal curve generated by the motor controller in the drive system includes but is not limited to the following forms:

[0167] 5) When the temperature of the motor controller itself is not abnormal and the second temperature sensor connected to the motor controller itself is not faulty, the second drive signal curve is a straight line that sinks relative to the high level;

[0168] 6) When the temperature of the motor controller itself is abnormal and the second temperature sensor connected to the motor controller itself is not faulty, the curve of the second drive signal is still a straight line that sinks relative to the high level;

[0169] 7) When the temperature of the motor controller itself is not abnormal, but the second temperature sensor connected to the motor controller itself fails, the curve of the second drive signal is a rising edge curve that changes from a low level to a high level;

[0170] 8) When the temperature of the motor controller itself is abnormal and the second temperature sensor connected to the motor controller also fails, the curve of the second drive signal is still a rising edge curve that changes from a low level to a high level;

[0171] Optionally, when the temperature of the drive system is normal, the first drive signal curve and the second drive signal curve are both straight lines that sink relative to the high level. When the temperature of the drive system is abnormal, observe the changes in the first drive signal curve and the second drive signal curve, and judge the source of the abnormal temperature of the drive system based on the changes in the first drive signal curve and the second drive signal curve: when the first drive signal curve does not change, it means that the temperature of the motor itself is abnormal; when the first drive signal curve changes, it means that the first temperature sensor connected to the motor itself is faulty; when the second drive signal curve does not change, it means that the temperature of the motor controller itself is abnormal; when the second drive signal curve changes, it means that the second temperature sensor connected to the motor controller itself is faulty.

[0172] When the temperature of the drive system is abnormal, the drive system determines the fault source of the abnormal temperature of the drive system according to the change of the drive signal curve, and determines the target mode for driving the electric vehicle according to the fault source.

[0173] Optionally, the target mode for driving the electric vehicle includes but is not limited to the following modes:

[0174] 1. Speed-limited driving mode;

[0175] 2. Low-speed driving mode;

[0176] 3. Normal driving mode;

[0177] Among them, the above-mentioned target modes all drive the electric vehicle by changing the power output by the drive system.

[0178] It is worth noting that when the temperature of the drive system is abnormal, the expression forms of the first drive signal curve and the second drive signal curve generated by the motor controller in the drive system can be arbitrary; when the temperature of the drive system is abnormal, the expression forms of the first drive signal curve and the second drive signal curve generated by the motor controller in the drive system can be arbitrary; the method of judging the fault source of the abnormal temperature of the drive system based on the changes in the first drive signal curve and the second drive signal curve can be arbitrary; the target mode for driving the electric vehicle can include any type of target mode; the method in which the drive system drives the electric vehicle in different target modes can be arbitrary; this embodiment does not limit this.

[0179] Step 904 : In response to the first temperature sensing curve and the second temperature sensing curve being less than the temperature threshold, and the first driving signal curve and the second driving signal curve remaining unchanged, it is determined to drive the electric vehicle in the normal driving mode.

[0180] If the first temperature data corresponding to the first temperature sensing curve and the second temperature data corresponding to the second temperature sensing curve are both less than the temperature threshold, it means that the motor and the motor controller in the drive system have no temperature anomaly. At this time, the first drive signal curve and the second drive signal curve remain unchanged, which means that the first drive signal curve and the second drive signal curve have not changed, that is, the first temperature sensing curve corresponding to the first drive signal curve and the second temperature sensing curve corresponding to the second drive signal curve have not changed.

[0181] The temperature of the drive system is normal, and the electric vehicle is determined to be driven in normal drive mode.

[0182] Indicative, Fig.10 is a schematic diagram of driving an electric vehicle in a normal driving mode, such as Fig.10 As shown:

[0183] In the first to fourth intervals:

[0184] The first temperature sensing curve 1002 does not exceed the temperature threshold 1001, the first temperature sensing curve 1002 does not jump, and the first driving signal curve 1003 corresponding to the first temperature sensing curve 1002 does not jump. The motor temperature is not abnormal, and the first temperature sensor connected to the motor is not faulty.

[0185] The second temperature sensing curve 1004 does not exceed the temperature threshold 1001, the second temperature sensing curve 1004 does not jump, and the second driving signal curve 1005 corresponding to the second temperature sensing curve 1004 does not jump. The temperature of the motor controller is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0186] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with a maximum power of 1006 as the output maximum power value.

[0187] Step 905 , in response to one of the first temperature sensing curve and the second temperature sensing curve being greater than a temperature threshold, determining a target mode for driving the electric vehicle based on a jump condition between the first driving signal curve and the second driving signal curve.

[0188] When one of the first temperature sensing curve and the second temperature sensing curve has a temperature greater than the temperature threshold, the jump situation of the first driving signal curve and the second driving signal curve includes but is not limited to one of the following situations:

[0189] 1. The first temperature sensing curve is greater than the temperature threshold, the second temperature sensing curve is less than the temperature threshold, the first drive signal curve jumps, and the second drive signal curve does not jump;

[0190] 2. The first temperature sensing curve is greater than the temperature threshold, the second temperature sensing curve is less than the temperature threshold, the first drive signal curve does not jump, and the second drive signal curve does not jump;

[0191] 3. The first temperature sensing curve is less than the temperature threshold, the second temperature sensing curve is greater than the temperature threshold, the first drive signal curve does not jump, and the second drive signal curve does not jump;

[0192] 4. The first temperature sensing curve is less than the temperature threshold, the second temperature sensing curve is greater than the temperature threshold, the first drive signal curve does not jump, and the second drive signal curve jumps;

[0193] Among them, the first and fourth cases drive the electric vehicle in a speed-limited driving mode, and the second and third cases drive the electric vehicle in a low-speed mode.

[0194] Indicative, Fig.11 is a schematic diagram of driving an electric vehicle in a speed-limited driving mode, such as Fig.11 As shown:

[0195] In the first interval:

[0196] The first temperature sensing curve 1102 does not exceed the temperature threshold 1101, the first temperature sensing curve 1102 does not jump, and the first driving signal curve 1103 corresponding to the first temperature sensing curve 1102 does not jump. The motor temperature is not abnormal, and the first temperature sensor connected to the motor is not faulty.

[0197] The second temperature sensing curve 1104 does not exceed the temperature threshold 1101, the second temperature sensing curve 1104 does not jump, and the second driving signal curve 1105 corresponding to the second temperature sensing curve 1104 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0198] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with the maximum power 1106 as the output maximum power value.

[0199] In the second to fourth intervals:

[0200] The first temperature sensing curve 1102 exceeds the temperature threshold 1101, the first temperature sensing curve 1102 jumps at point A, and the first driving signal curve 1103 corresponding to the first temperature sensing curve 1102 also jumps at point A. The motor temperature is normal, but the first temperature sensor connected to the motor fails.

[0201] The second temperature sensing curve 1104 does not exceed the temperature threshold 1101, the second temperature sensing curve 1104 does not jump, and the second driving signal curve 1105 corresponding to the second temperature sensing curve 1104 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0202] If the motor, motor controller and second temperature sensor in the drive system have no temperature anomaly, but the first temperature sensor has a temperature anomaly, then the drive system has a temperature anomaly. The drive system drives the electric vehicle in a speed-limited drive mode, that is, the drive system drives the electric vehicle with a rated power of 1107 as the maximum output power value.

[0203] Indicative, Fig.12 is another schematic diagram of driving an electric vehicle in a low-speed driving mode, such as Fig.12 As shown:

[0204] From the first interval to the second interval:

[0205] The first temperature sensing curve 1202 does not exceed the temperature threshold 1201, the first temperature sensing curve 1202 does not jump, and the first driving signal curve 1203 corresponding to the first temperature sensing curve 1202 does not jump. The motor temperature is not abnormal, and the first temperature sensor connected to the motor is not faulty.

[0206] The second temperature sensing curve 1204 does not exceed the temperature threshold 1201, the second temperature sensing curve 1204 does not jump, and the second driving signal curve 1205 corresponding to the second temperature sensing curve 1204 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0207] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with the maximum power 1206 as the output maximum power value.

[0208] In the third interval:

[0209] The first temperature sensing curve 1202 exceeds the temperature threshold 1201, the first temperature sensing curve 1202 does not jump, and the first driving signal curve 1203 corresponding to the first temperature sensing curve 1202 does not jump. The motor temperature is abnormal, and the first temperature sensor connected to the motor is not faulty.

[0210] The second temperature sensing curve 1204 does not exceed the temperature threshold 1201, the second temperature sensing curve 1204 does not jump, and the second driving signal curve 1205 corresponding to the second temperature sensing curve 1204 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0211] If the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature anomaly, but the motor has a temperature anomaly, then the drive system has a temperature anomaly. The drive system drives the electric vehicle in a low-speed drive mode, that is, the drive system drives the electric vehicle with the minimum power 1208 as the maximum output power value.

[0212] In the fourth interval:

[0213] The first temperature sensing curve 1202 drops below the temperature threshold 1201, the first temperature sensing curve 1202 does not jump, and the first driving signal curve 1203 corresponding to the first temperature sensing curve 1202 does not jump. The motor temperature is normal, and the first temperature sensor connected to the motor is not faulty.

[0214] The second temperature sensing curve 1204 does not exceed the temperature threshold 1201, the second temperature sensing curve 1204 does not jump, and the second driving signal curve 1205 corresponding to the second temperature sensing curve 1204 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0215] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with the maximum power 1206 as the output maximum power value.

[0216] Step 906 : In response to the first temperature sensing curve and the second temperature sensing curve both being greater than a temperature threshold, a target mode for driving the electric vehicle is determined based on a jump condition of the first driving signal curve and the second driving signal curve.

[0217] When the first temperature sensing curve and the second temperature sensing curve are both greater than the temperature threshold, the jump conditions of the first driving signal curve and the second driving signal curve include but are not limited to one of the following conditions:

[0218] 1. The first drive signal curve changes, but the second drive signal curve does not change;

[0219] 2. The first drive signal curve does not jump, and the second drive signal curve does not jump;

[0220] 3. The first drive signal curve jumps, and the second drive signal curve jumps;

[0221] 4. The first drive signal curve does not jump, but the second drive signal curve jumps;

[0222] The first, third and fourth cases drive the electric vehicle in the speed-limited driving mode, and the second case drives the electric vehicle in the low-speed mode. The driving power of the electric vehicle in the speed-limited driving mode is greater than the driving power of the electric vehicle in the low-speed driving mode, and the priority of the low-speed driving mode is greater than the priority of the speed-limited driving mode.

[0223] Indicative, Fig.13 is another schematic diagram of driving an electric vehicle in a low-speed driving mode, such as Fig.13 As shown:

[0224] In the first interval:

[0225] The first temperature sensing curve 1302 does not exceed the temperature threshold 1301, the first temperature sensing curve 1302 does not jump, and the first driving signal curve 1303 corresponding to the first temperature sensing curve 1302 does not jump. The motor temperature is not abnormal, and the first temperature sensor connected to the motor is not faulty.

[0226] The second temperature sensing curve 1304 does not exceed the temperature threshold 1301, the second temperature sensing curve 1304 does not jump, and the second driving signal curve 1305 corresponding to the second temperature sensing curve 1304 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0227] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with the maximum power 1306 as the output maximum power value.

[0228] In the second interval:

[0229] The first temperature sensing curve 1302 exceeds the temperature threshold 1301, the first temperature sensing curve 1302 does not jump, and the first driving signal curve 1303 corresponding to the first temperature sensing curve 1302 does not jump. The motor temperature is abnormal, and the first temperature sensor connected to the motor is not faulty. The drive system drives the electric vehicle in a low-speed drive mode, that is, the drive system drives the electric vehicle with the minimum power 1308 as the maximum output power value.

[0230] In the third interval:

[0231] The second temperature sensing curve 1304 exceeds the temperature threshold 1301, the second temperature sensing curve 1304 does not jump, and the second driving signal curve 1305 corresponding to the second temperature sensing curve 1304 does not jump. The temperature of the motor controller is abnormal, and the second temperature sensor connected to the motor controller is not faulty. The drive system drives the electric vehicle in a low-speed drive mode, that is, the drive system drives the electric vehicle with the minimum power 1308 as the maximum output power value.

[0232] In the fourth interval:

[0233] The first temperature sensing curve 1302 drops below the temperature threshold 1301, the first temperature sensing curve 1302 does not jump, and the first driving signal curve 1303 corresponding to the first temperature sensing curve 1302 does not jump either. The motor temperature is normal, and the first temperature sensor connected to the motor is not faulty.

[0234] The second temperature sensing curve 1304 drops below the temperature threshold 1301, and the second temperature sensing curve 1304 does not jump, and the second driving signal curve 1305 corresponding to the second temperature sensing curve 1304 does not jump. The motor controller temperature is normal, and the second temperature sensor connected to the motor controller is not faulty.

[0235] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with the maximum power 1306 as the output maximum power value.

[0236] Indicative, Fig.14 is a schematic diagram of driving an electric vehicle in a limited speed driving mode and a low speed driving mode successively, such as Fig.14 As shown:

[0237] In the first interval:

[0238] The first temperature sensing curve 1402 does not exceed the temperature threshold 1401, the first temperature sensing curve 1402 does not jump, and the first driving signal curve 1403 corresponding to the first temperature sensing curve 1402 does not jump. The motor temperature is not abnormal, and the first temperature sensor connected to the motor is not faulty.

[0239] The second temperature sensing curve 1404 does not exceed the temperature threshold 1401, the second temperature sensing curve 1404 does not jump, and the second driving signal curve 1405 corresponding to the second temperature sensing curve 1404 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0240] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with the maximum power 1406 as the output maximum power value.

[0241] In the second interval:

[0242] The first temperature sensing curve 1402 exceeds the temperature threshold 1401, the first temperature sensing curve 1402 jumps at A, and the first driving signal curve 1403 corresponding to the first temperature sensing curve 1402 also jumps at A. The motor temperature is normal, and the first temperature sensor connected to the motor fails. The drive system drives the electric vehicle in a speed-limited drive mode, that is, the drive system drives the electric vehicle with the rated power 1407 as the maximum output power value.

[0243] In the third interval:

[0244] The second temperature sensing curve 1404 exceeds the temperature threshold 1401, the second temperature sensing curve 1404 does not jump, and the second driving signal curve 1405 corresponding to the second temperature sensing curve 1404 does not jump. The temperature of the motor controller is abnormal, and the second temperature sensor connected to the motor controller is not faulty. The drive system drives the electric vehicle in a low-speed drive mode, that is, the drive system drives the electric vehicle with the minimum power 1408 as the maximum output power value.

[0245] In the fourth interval:

[0246] The second temperature sensing curve 1404 drops below the temperature threshold 1401, the second temperature sensing curve 1404 does not jump, and the second driving signal curve 1405 corresponding to the second temperature sensing curve 1404 does not jump. The motor temperature is normal, the first temperature sensor connected to the motor is still faulty, the motor controller temperature is normal, and the second temperature sensor connected to the motor controller is not faulty. The drive system drives the electric vehicle in a speed-limited drive mode, that is, the drive system drives the electric vehicle with the rated power 1407 as the maximum output power value.

[0247] Indicative, Fig.15 is another schematic diagram of driving an electric vehicle in a limited speed driving mode, such as Fig.15 As shown:

[0248] In the first interval:

[0249] The first temperature sensing curve 1502 does not exceed the temperature threshold 1501, the first temperature sensing curve 1502 does not jump, and the first driving signal curve 1503 corresponding to the first temperature sensing curve 1502 does not jump. The motor temperature is not abnormal, and the first temperature sensor connected to the motor is not faulty.

[0250] The second temperature sensing curve 1504 does not exceed the temperature threshold 1501, the second temperature sensing curve 1504 does not jump, and the second driving signal curve 1505 corresponding to the second temperature sensing curve 1504 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0251] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with a maximum power of 1506 as the output maximum power value.

[0252] In the second to third intervals:

[0253] The first temperature sensing curve 1502 exceeds the temperature threshold 1501, the first temperature sensing curve 1502 jumps at A, and the first driving signal curve 1503 corresponding to the first temperature sensing curve 1502 also jumps at A. The motor temperature is normal, and the first temperature sensor connected to the motor fails. The drive system drives the electric vehicle in a speed-limited drive mode, that is, the drive system drives the electric vehicle with the rated power 1507 as the maximum output power value.

[0254] In the fourth interval:

[0255] The second temperature sensing curve 1504 exceeds the temperature threshold 1501, the second temperature sensing curve 1502 jumps at C, and the second driving signal curve 1505 corresponding to the second temperature sensing curve 1504 also jumps at C. The temperature of the motor controller is normal, and the second temperature sensor connected to the motor controller fails. The drive system drives the electric vehicle in a speed-limited drive mode, that is, the drive system drives the electric vehicle with the rated power 1507 as the maximum output power value.

[0256] Indicative, Fig.16 is another schematic diagram of driving an electric vehicle in a low-speed driving mode and a limited-speed driving mode successively, such as Fig.16 As shown:

[0257] In the first interval:

[0258] The first temperature sensing curve 1602 does not exceed the temperature threshold 1601, the first temperature sensing curve 1602 does not jump, and the first driving signal curve 1603 corresponding to the first temperature sensing curve 1602 does not jump. The motor temperature is not abnormal, and the first temperature sensor connected to the motor is not faulty.

[0259] The second temperature sensing curve 1604 does not exceed the temperature threshold 1601, the second temperature sensing curve 1604 does not jump, and the second driving signal curve 1605 corresponding to the second temperature sensing curve 1604 does not jump. The motor controller temperature is not abnormal, and the second temperature sensor connected to the motor controller is not faulty.

[0260] If the motor, the motor controller, the first temperature sensor and the second temperature sensor in the drive system have no temperature abnormality, then the drive system has no temperature abnormality. The drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with a maximum power of 1606 as the output maximum power value.

[0261] In the second interval:

[0262] The second temperature sensing curve 1604 exceeds the temperature threshold 1601, the second temperature sensing curve 1604 does not jump, and the second driving signal curve 1605 corresponding to the second temperature sensing curve 1604 does not jump. The temperature of the motor controller is abnormal, and the second temperature sensor connected to the motor controller is not faulty. The drive system drives the electric vehicle in a low-speed drive mode, that is, the drive system drives the electric vehicle with the minimum power 1608 as the maximum output power value.

[0263] In the third interval:

[0264] The second temperature sensing curve 1604 decreases below the temperature threshold 1601, the second temperature sensing curve 1604 does not jump, and the second driving signal curve 1605 corresponding to the second temperature sensing curve 1604 does not jump. The drive system has no temperature anomaly, and the drive system drives the electric vehicle in a normal drive mode, that is, the drive system drives the electric vehicle with the maximum power 1606 as the output maximum power value.

[0265] In the fourth interval:

[0266] The first temperature sensing curve 1602 exceeds the temperature threshold 1601, the first temperature sensing curve 1602 jumps at C, and the first driving signal curve 1603 corresponding to the first temperature sensing curve 1602 also jumps at C. The motor temperature is normal, and the first temperature sensor connected to the motor fails. The drive system drives the electric vehicle in a speed-limited drive mode, that is, the drive system drives the electric vehicle with the rated power 1607 as the maximum output power value.

[0267] It is worth noting that the forms of the first temperature sensing curve and the second temperature sensing curve can be arbitrary, and the forms of the first drive signal curve and the second drive signal curve can also be arbitrary; if a jump occurs, the jump order of the first drive signal curve and the second drive signal curve can be arbitrary, and the above example is only for illustration, and the jump time point of the first drive signal curve and the second drive signal curve can be arbitrary; the method of driving the electric vehicle by determining the target mode based on the jump of the first drive signal curve and the second drive signal curve can be arbitrary; this embodiment does not limit this.

[0268] Step 907 , driving the electric vehicle to operate in the target mode through the driving system.

[0269] The drive system determines whether the temperature of the drive system is abnormal, the source of the abnormal temperature of the drive system, and determines a target mode for driving the electric vehicle according to the first drive signal curve and the second drive signal curve, and drives the electric vehicle based on the target mode.

[0270] Fig.17 It is a timing diagram of a driving system determining the source of temperature anomaly and driving the electric vehicle in different target modes, such as Fig.17 As shown:

[0271] Step 1701, receiving temperature sensing data.

[0272] The motor controller in the driving system receives temperature sensing data, which includes: first temperature sensing data detected by a first temperature sensor connected to the motor, and second temperature sensing data detected by a second temperature sensor connected to the motor controller.

[0273] Step 1702: Generate a driving signal curve.

[0274] The motor controller in the drive system generates a first drive signal curve corresponding to the first temperature sensing data and a second drive signal curve corresponding to the second temperature sensing data based on the temperature sensing data.

[0275] Step 1703: determine whether the temperature of the motor and the motor controller in the drive system is abnormal based on the temperature sensing data.

[0276] If all the temperature sensor data are lower than the temperature threshold, it means that the temperature of the drive system is normal, and the electric vehicle is driven in the normal drive mode as the target mode; if at least one of the temperature sensor data is greater than the temperature threshold, it means that the temperature of the drive system is abnormal, and the motor controller determines the source of the temperature abnormality based on the first drive signal curve and the second drive signal curve.

[0277] Step 1704, determine the fault source of the abnormal temperature of the drive system.

[0278] Fault judgment 1: The temperature of the drive system is abnormal due to the fault of the first temperature sensor or the second temperature sensor itself. In this case, the electric vehicle is driven in the speed-limited driving mode as the target mode;

[0279] Fault judgment 2: The temperature of the drive system is abnormal due to overheating of the motor or motor controller itself. At this time, the electric vehicle is driven in low-speed drive mode as the target mode.

[0280] Step 1705 , determining a target mode based on the result of the fault judgment, and driving the electric vehicle.

[0281] When the above two faults occur at the same time, the priority of the low-speed driving mode is greater than that of the speed-limited driving mode, including but not limited to the following situations:

[0282] 1. The first temperature sensor fails and the motor controller is overheated, the second temperature sensor and the motor are normal, and the electric vehicle is driven in a low-speed driving mode;

[0283] 2. The second temperature sensor fails and the motor is overheated, the first temperature sensor and the motor controller are normal, and the electric vehicle is driven in a low-speed driving mode;

[0284] 3. The first temperature sensor fails and the motor is overheated, while the second temperature sensor and the motor controller are normal. At this time, due to the failure of the first temperature sensor, the first temperature sensing curve jumps, and the first temperature sensing data is unavailable, so the first driving signal also jumps, and the electric vehicle is driven in the speed-limited driving mode;

[0285] 4. The second temperature sensor fails and the motor controller is overheated, the first temperature sensor and the motor are normal. At this time, due to the failure of the second temperature sensor, the second temperature sensing curve jumps, and the second temperature sensing data is unavailable, so the second drive signal also jumps, and the electric vehicle is driven in the speed limited drive mode.

[0286] The driving power of the electric vehicle in the normal driving mode is greater than the driving power of the electric vehicle in the limited driving mode, and the driving power of the electric vehicle in the speed limited driving mode is greater than the driving power of the electric vehicle in the low speed driving mode.

[0287] It is worth noting that the operations performed in the above-mentioned step 904, the operations performed in step 905 and the operations performed in step 906 are parallel, that is, the operations in step 904, the operations in step 905 and the operations in step 906 are performed simultaneously; that is, after executing the operation in step 903, the operations in step 904, the operations in step 905 and the operations in step 906 are performed simultaneously.

[0288] In summary, the method provided in this embodiment enables the drive system to determine the source of the temperature abnormality fault through the temperature signal detected by the built-in temperature sensor of the drive system, and control the driving mode of the vehicle according to different faults. When the temperature abnormality is detected, the vehicle driving mode is changed instead of directly stopping the drive system, which effectively avoids safety accidents caused by sudden power loss during driving, improves the safety of the whole vehicle, and does not cause damage to the drive system itself.

[0289] The method provided in this embodiment connects the first temperature sensor and the second temperature sensor to the motor and the motor controller in the drive system respectively, and collects temperature data at different positions inside the drive system. The fault source of the abnormal temperature of the drive system is determined based on different drive signal curves corresponding to the temperature data. It can more accurately determine whether the drive system has a temperature abnormality and the direct fault source of the temperature abnormality, provide a drive mode that is more suitable for electric vehicles, and improve the safety of the entire vehicle.

[0290] The method provided in this embodiment, by comparing the magnitude relationship between the first temperature sensing curve and the second temperature sensing curve and the temperature threshold, and the corresponding jump conditions of the first drive signal curve and the second drive signal curve, lists the target modes for driving the electric vehicle under different conditions, thereby improving the accuracy of the target mode and the safety of the entire vehicle. The method provided in this embodiment, by comparing the magnitude relationship between the first temperature sensing curve and the second temperature sensing curve and the temperature threshold, and the corresponding jump conditions of the first drive signal curve and the second drive signal curve, lists the types of temperature anomalies of the drive system under different conditions, and provides a target mode for driving the electric vehicle, thereby improving the accuracy of the target mode and the safety of the entire vehicle.

[0291] Fig.18 is a structural block diagram of a code pairing device provided by an exemplary embodiment of the present application, such as Fig.18 As shown, the device comprises:

[0292] An acquisition module 1810 is used to acquire temperature sensing data corresponding to the drive system, wherein the temperature sensing data is data detected by a temperature sensor connected to the drive system, and the drive system is used to drive the operation of the electric vehicle;

[0293] The acquisition module 1810 is further configured to acquire, based on a temperature sensing curve corresponding to the temperature sensing data, a driving signal curve generated by the driving system and corresponding to the temperature sensing data, wherein the driving signal curve is used to represent a change feature corresponding to the temperature sensing curve;

[0294] A determination module 1820, configured to determine a target mode for driving the electric vehicle based on a corresponding relationship between changes in the temperature sensing curve and the driving signal curve;

[0295] The driving module 1830 is configured to drive the electric vehicle to operate in the target mode through the driving system.

[0296] In an optional embodiment, the determination module 1820 is further used to determine a target mode for driving the electric vehicle based on a jump condition of the driving signal curve in response to a temperature value corresponding to the temperature sensing curve being greater than a temperature threshold.

[0297] In an optional embodiment, the determination module 1820 is also used to determine that the electric vehicle is driven in a first mode in response to a jump in the drive signal curve at a node where the temperature value is greater than the temperature threshold; in response to the drive signal curve remaining unchanged when the temperature value is greater than the temperature threshold, determine that the electric vehicle is driven in a second mode; wherein the driving power of the electric vehicle in the first mode is greater than the driving power of the electric vehicle in the second mode.

[0298] In an optional embodiment, the determination module 1820 is further used to determine a target mode for driving the electric vehicle based on a jump condition of the driving signal curve in response to a temperature value corresponding to the temperature sensing curve being lower than a temperature threshold.

[0299] In an optional embodiment, the determination module 1820 is further used to determine that the electric vehicle is driven in a first mode in response to a jump in the drive signal curve at a node where the temperature value is lower than the temperature threshold; in response to the drive signal curve remaining unchanged when the temperature value is lower than the temperature threshold, determine that the electric vehicle is driven in a third mode; wherein the driving power of the electric vehicle in the third mode is greater than the driving power of the electric vehicle in the first mode.

[0300] In an optional embodiment, the drive system includes a motor and a motor controller; the temperature sensing data includes first temperature sensing data collected by a first temperature sensor connected to the motor, and second temperature sensing data collected by a second temperature sensor connected to the motor controller;

[0301] The first temperature sensing data corresponds to a first temperature sensing curve and a first driving signal curve output by the motor; the second temperature sensing data corresponds to a second temperature sensing curve and a second driving signal curve output by the motor controller.

[0302] In an optional embodiment, the determination module 1820 is further used to determine that the electric vehicle is driven in a normal driving mode in response to the first temperature sensing curve and the second temperature sensing curve being less than a temperature threshold and the first drive signal curve and the second drive signal curve remaining unchanged; in response to the presence of at least one of the first temperature sensing curve and the second temperature sensing curve being greater than the temperature threshold, determine a target mode for driving the electric vehicle based on a jump condition of the first drive signal curve and the second drive signal curve.

[0303] In an optional embodiment, the first temperature sensing curve and the second temperature sensing curve are greater than the temperature threshold; the determination module 1820 is further used to determine that the electric vehicle is driven in a speed limited driving mode in response to a jump in the first drive signal curve and the second drive signal curve; in response to the presence of at least one drive signal curve between the first drive signal curve and the second drive signal curve that has not jumped, determine that the electric vehicle is driven in a low speed driving mode; wherein the driving power of the electric vehicle in the speed limited driving mode is greater than the driving power of the electric vehicle in the low speed driving mode.

[0304] In summary, the device provided by the present application enables the drive system to determine the source of the temperature abnormality through the temperature signal detected by the built-in temperature sensor of the drive system, and control the driving mode of the vehicle according to different faults. When the temperature abnormality is detected, by changing the vehicle driving mode instead of directly stopping the drive system, the safety accident caused by the sudden loss of power during driving of the vehicle is effectively avoided, the safety of the whole vehicle is improved, and at the same time, the drive system itself will not be damaged.

[0305] It should be noted that the vehicle control device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the vehicle control device provided in the above embodiment and the vehicle control method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0306] Fig.19 The block diagram of the structure of an electric vehicle 1900 provided by an exemplary embodiment of the present application is shown. The electric vehicle 1900 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III), an MP4 (Moving Picture Experts Group Audio Layer IV), a laptop or a desktop computer. The electric vehicle 1900 may also be called a user device or other names.

[0307] Typically, the electric vehicle 1900 includes a processor 1901 and a memory 1902 .

[0308] The processor 1901 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 1901 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 1901 may also include a main processor and a coprocessor. The main processor is a processor for processing data in an awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 1901 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 1901 may also include an AI processor for processing computing operations related to machine learning.

[0309] The memory 1902 may include one or more computer-readable storage media, which may be non-transitory. The memory 1902 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 1902 is used to store at least one instruction, which is used to be executed by the processor 1901 to implement the code matching method provided in the method embodiment of the present application.

[0310] In some embodiments, the electric vehicle 1900 further includes other components, which can be understood by those skilled in the art. Fig.19 The structure shown in the figure does not constitute a limitation on the terminal 1900, and the terminal 1900 may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.

[0311] Optionally, the computer readable storage medium may include: a read-only memory (ROM), a random access memory (RAM), a solid state drive (SSD), or an optical disk. Among them, the random access memory may include a resistance random access memory (ReRAM) and a dynamic random access memory (DRAM). The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0312] An embodiment of the present application also provides an electric vehicle, which includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement a vehicle control method as described in any of the above embodiments of the present application.

[0313] An embodiment of the present application also provides a computer-readable storage medium, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement a vehicle control method as described in any of the above embodiments of the present application.

[0314] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0315] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle control method, characterized in that: Applied to an electric vehicle, the method comprises: Acquire temperature sensing data corresponding to a drive system, wherein the temperature sensing data is data detected by a temperature sensor connected to the drive system, and the drive system is used to drive the operation of the electric vehicle; wherein the drive system includes a motor and a motor controller; Based on the temperature sensing curve corresponding to the temperature sensing data, a driving signal curve generated by the driving system and corresponding to the temperature sensing data is obtained, and the driving signal curve is used to represent the change characteristics corresponding to the temperature sensing curve; wherein the temperature sensing data includes first temperature sensing data collected by a first temperature sensor connected to the motor, and second temperature sensing data collected by a second temperature sensor connected to the motor controller; the first temperature sensing data corresponds to a first temperature sensing curve and a first driving signal curve output by the motor; the second temperature sensing data corresponds to a second temperature sensing curve and a second driving signal curve output by the motor controller; Determining a target mode for driving the electric vehicle based on a corresponding relationship between changes in the temperature sensing curve and the driving signal curve; The electric vehicle is driven to operate in the target mode by the driving system.

2. The method according to claim 1, characterized in that The determining of a target mode for driving the electric vehicle based on a change correspondence between the temperature sensing curve and the driving signal curve includes: In response to a temperature value corresponding to the temperature sensing curve being greater than a temperature threshold, a target mode for driving the electric vehicle is determined based on a jump condition of the driving signal curve.

3. The method according to claim 2, characterized in that The step of determining a target mode for driving the electric vehicle based on a jump condition of the driving signal curve includes: In response to a jump in the driving signal curve at a node where the temperature value is greater than the temperature threshold, determining to drive the electric vehicle in a first mode; In response to the driving signal curve remaining unchanged when the temperature value is greater than the temperature threshold, determining to drive the electric vehicle in a second mode; The driving power of the electric vehicle in the first mode is greater than the driving power of the electric vehicle in the second mode.

4. The method according to claim 1, characterized in that: The determining of a target mode for driving the electric vehicle based on the change correspondence between the temperature sensing curve and the driving signal curve further includes: In response to a temperature value corresponding to the temperature sensing curve being lower than a temperature threshold, a target mode for driving the electric vehicle is determined based on a jump condition of the driving signal curve.

5. The method according to claim 4, characterized in that The step of determining a target mode for driving the electric vehicle based on a jump condition of the driving signal curve includes: In response to a jump in the driving signal curve at a node where the temperature value is lower than the temperature threshold, determining to drive the electric vehicle in a first mode; In response to the driving signal curve remaining unchanged when the temperature value is lower than the temperature threshold, determining to drive the electric vehicle in a third mode; The driving power of the electric vehicle in the third mode is greater than the driving power of the electric vehicle in the first mode.

6. The method according to claim 1, characterized in that The determining of a target mode for driving the electric vehicle based on a change correspondence between the temperature sensing curve and the driving signal curve includes: In response to the first temperature sensing curve and the second temperature sensing curve being less than a temperature threshold, and the first driving signal curve and the second driving signal curve remaining unchanged, determining to drive the electric vehicle in a normal driving mode; In response to at least one of the first temperature sensing curve and the second temperature sensing curve being greater than the temperature threshold, a target mode for driving the electric vehicle is determined based on a jump condition of the first drive signal curve and the second drive signal curve.

7. The method according to claim 6, characterized in that The first temperature sensing curve and the second temperature sensing curve are greater than the temperature threshold; The step of determining a target mode for driving the electric vehicle based on the jump conditions of the first drive signal curve and the second drive signal curve includes: In response to a jump between the first drive signal curve and the second drive signal curve, determining to drive the electric vehicle in a speed-limited drive mode; In response to at least one of the first driving signal curve and the second driving signal curve not having a jump, determining to drive the electric vehicle in a low-speed driving mode; The driving power of the electric vehicle in the speed-limited driving mode is greater than the driving power of the electric vehicle in the low-speed driving mode.

8. A vehicle control device, characterized in that: The vehicle control device is used to implement the vehicle control method according to any one of claims 1 to 7, and the device includes: An acquisition module, which acquires temperature sensing data corresponding to the drive system, wherein the temperature sensing data is data detected by a temperature sensor connected to the drive system, and the drive system is used to drive the operation of the electric vehicle; The acquisition module acquires a drive signal curve corresponding to the temperature sensing data and generated by the drive system based on a temperature sensing curve corresponding to the temperature sensing data, wherein the drive signal curve is used to represent a change feature corresponding to the temperature sensing curve; A determination module, which determines a target mode for driving the electric vehicle based on a corresponding relationship between changes in the temperature sensing curve and the driving signal curve; A driving module drives the electric vehicle to operate in the target mode through the driving system.

9. An electric vehicle, characterized in that: The electric vehicle comprises a processor and a memory, wherein the memory stores at least one program, and the at least one program is loaded and executed by the processor to implement the vehicle control method as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the vehicle control method as described in any one of claims 1 to 7.

Images