Heating control method of axle half shaft disconnecting device, computer storage medium and vehicle

Abstract

The invention discloses a heating control method for an axle half shaft disconnecting device, a computer storage medium and a vehicle. The heating control method for the axle half shaft disconnecting device comprises the steps that the current working temperature of the axle half shaft disconnecting device is determined; and when the current working temperature is lower than the lowest working temperature of the axle half-shaft disconnecting device, the heating unit is controlled to heat the axle half-shaft disconnecting device. According to the method, the axle disconnecting device is heated, and it is ensured that the axle disconnecting device can work normally in the low-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a heating control method for an axle half-axle disconnect device and a vehicle. Background Art

[0002] When an electric four-wheel drive vehicle is driving on a good road, in order to reduce vehicle energy consumption, it usually only uses the direct drive mode of the front axle engine, and the rear axle motor does not work. However, when the rear axle of the electric four-wheel drive vehicle is not working, there are still weak magnetic losses of the motor and shaft gear drag losses of the reducer.

[0003] In the related art, a half-axle disconnect device is used to disconnect the rear axle wheel half-axle from the reducer to prevent the wheel from driving the rear axle motor and the shaft gear to rotate. However, if the half-axle disconnect device is in a low temperature environment, the half-axle disconnect device may become stuck or fail to execute the action. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a heating control method for an axle half-shaft disconnect device, which ensures that the axle half-shaft disconnect device can work normally in a low temperature environment by heating the axle half-shaft disconnect device.

[0005] A second objective of the present invention is to provide a computer storage medium.

[0006] A third object of the present invention is to provide a vehicle.

[0007] In order to solve the above problems, an embodiment of the first aspect of the present invention proposes a heating control method for an axle half-axle disconnect device, comprising: determining the current operating temperature of the axle half-axle disconnect device; when the current operating temperature is lower than the minimum operating temperature of the axle half-axle disconnect device, controlling a heating unit to heat the axle half-axle disconnect device.

[0008] According to the heating control method of the axle half-axle disconnect device of the embodiment of the present invention, it is determined whether there is a problem of too low temperature causing the axle half-axle disconnect device to fail to work normally through the current operating temperature of the axle half-axle disconnect device. When the current operating temperature is lower than the minimum operating temperature of the axle half-axle disconnect device, the heating unit is controlled to actively heat the axle half-axle disconnect device, thereby solving the problem of failure of the axle half-axle disconnect device in low temperature environment.

[0009] In some embodiments, the axle half-shaft disconnect device includes an electromagnetic coil for controlling the disconnection / engagement of the half-shaft, and determining the current operating temperature of the axle half-shaft disconnect device includes: determining the standard resistance of the electromagnetic coil at a target temperature; determining the input voltage, output voltage and current operating current of the electromagnetic coil when controlling the axle half-shaft disconnect device to perform a disconnection action / engagement action; determining the current resistance of the electromagnetic coil based on the input voltage, the output voltage and the current operating current; determining the current operating temperature based on the current resistance, the target temperature and the standard resistance.

[0010] In some embodiments, the current operating temperature is determined based on the current resistance, the target temperature and the standard resistance, including: under the condition that the vehicle parking time is greater than or equal to a first preset time, obtaining a reference temperature collected by an existing temperature sensor in the vehicle; determining the coil detection temperature based on the current resistance, the target temperature and the standard resistance; determining the current operating temperature based on the reference temperature and the coil detection temperature.

[0011] In some embodiments, determining the current operating temperature of the axle half-shaft disconnect device includes: when the vehicle is in a powered-on state, determining the current operating temperature of the axle half-shaft disconnect device with a second preset time period as a period.

[0012] In some embodiments, the heating unit is an electromagnetic coil in the axle half-shaft disconnect device, and controlling the heating unit to heat the axle half-shaft disconnect device includes: controlling the electromagnetic coil to be energized to heat the axle half-shaft disconnect device.

[0013] In some embodiments, when controlling the electromagnetic coil to be energized, it includes: controlling the electromagnetic coil to be energized with the maximum allowable operating current of the electromagnetic coil; determining a heating restriction condition; determining a target heating time of the electromagnetic coil based on the heating restriction condition and the maximum allowable operating current; and controlling the electromagnetic coil based on the target heating time.

[0014] In some embodiments, the heating restriction condition is that the operating temperature of the axle half-axle disconnect device reaches a target heating temperature, wherein, at the target heating temperature, the temperature maintenance time of the axle half-axle disconnect device after stopping heating is greater than a third preset time, and the temperature maintenance time is the maintenance time of the current operating temperature of the axle half-axle disconnect device being greater than or equal to the minimum operating temperature.

[0015] In some embodiments, for the target heating temperature, it includes: determining the heat transfer coefficient, heat transfer area, equivalent heat capacity and equivalent mass of the axle half-axle disconnect device; determining the target heating temperature according to the heat transfer coefficient, the heat transfer area, the equivalent heat capacity, the equivalent mass, the third preset time, the external ambient temperature and the minimum operating temperature; for determining the target heating time of the electromagnetic coil according to the heating restriction condition, it includes: determining the required heating power according to the target heating temperature and the current operating temperature of the axle half-axle disconnect device before heating; determining the current resistance of the electromagnetic coil; determining the target heating time according to the maximum allowable operating current, the current resistance, the required heating power, the target heating temperature, the external ambient temperature, the heat transfer coefficient, the heat transfer area and the third preset time.

[0016] A second aspect of the present invention provides a computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the heating control method for an axle half-axle disconnect device of the above embodiment.

[0017] The third aspect of the present invention provides a vehicle, comprising: an axle half-axle disconnecting device and a heating unit; a controller, wherein the controller is respectively connected to the axle half-axle disconnecting device and the heating unit, and is used to execute the heating control method for the axle half-axle disconnecting device of the above embodiment.

[0018] According to the vehicle of the embodiment of the present invention, the problem of failure of the axle half-axle disconnect device in a low temperature environment can be solved by executing the heating control method of the above embodiment through the controller.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a schematic diagram of the axle half-shaft disconnect device; Figure 2 is a flow chart of a heating control method for an axle half-shaft disconnect device according to one embodiment of the present invention; Figure 3 is a schematic diagram of a safe operating temperature range according to an embodiment of the present invention; Figure 4 is a structural block diagram of a vehicle according to an embodiment of the present invention.

[0021] Reference numerals: Vehicle 100; Axle half shaft disconnect device 10 ; heating unit 20 ; controller 30 . DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0023] In order to solve the above problems, a first embodiment of the present invention proposes a heating control method for an axle half-axle disconnect device, which ensures that the axle half-axle disconnect device can work normally in a low temperature environment by heating the axle half-axle disconnect device.

[0024] Reference below Figure 1 A heating control method for an axle half-shaft disconnect device according to an embodiment of the present invention is described. The heating control method for an axle half-shaft disconnect device includes steps S1 to S2. The specific steps are as follows.

[0025] Step S1, determining the current operating temperature of the axle half-shaft disconnect device.

[0026] Specifically, in the related art, if the axle half-shaft disconnect device is in a low temperature environment, the axle half-shaft disconnect device may get stuck or fail to execute the action and cannot work normally. Therefore, the present application determines the current operating temperature of the axle half-shaft disconnect device to determine whether the axle half-shaft device cannot work normally.

[0027] Step S2, when the current operating temperature is lower than the lowest operating temperature of the axle half-shaft disconnect device, controlling the heating unit to heat the axle half-shaft disconnect device.

[0028] Specifically, when the current operating temperature is lower than the minimum operating temperature of the axle half-shaft disconnect device, the axle half-shaft disconnect device cannot work normally due to the low temperature, so the axle half-shaft disconnect device is heated by controlling the heating unit to reduce the oil viscosity and reduce the friction of the action, thereby solving the problem of failure of the axle half-shaft disconnect device in a low temperature environment. Among them, the minimum operating temperature can be obtained through experiments, for example, the minimum operating temperature is set to 9°C, 10°C, 11°C, etc., which can be set according to actual conditions and is not specifically limited here.

[0029] According to the heating control method of the axle half-axle disconnect device in an embodiment of the present invention, it is determined whether there is a problem of too low temperature causing the axle half-axle disconnect device to fail to work normally through the current operating temperature of the axle half-axle disconnect device. When the current operating temperature is lower than the minimum operating temperature of the axle half-axle disconnect device, the heating unit is controlled to heat the axle half-axle disconnect device to solve the problem of failure of the axle half-axle disconnect device in a low temperature environment.

[0030] In some embodiments, the axle half-shaft disconnect device includes an electromagnetic coil for controlling the disconnection / engagement of the half-shaft, and determining the current operating temperature of the axle half-shaft disconnect device includes: determining the standard resistance of the electromagnetic coil at the target temperature; determining the input voltage, output voltage and current operating current of the electromagnetic coil when controlling the axle half-shaft disconnect device to perform the disconnection action / engagement action; determining the current resistance of the electromagnetic coil based on the input voltage, output voltage and current operating current; determining the current operating temperature based on the current resistance, target temperature and standard resistance.

[0031] Specifically, the axle half-axle disconnect device has a built-in electromagnetic coil that performs mechanical displacement actions, such as controlling the disconnection / engagement of the half-axle. Therefore, it is in an oil-lubricated environment, and the oil viscosity is greatly affected by temperature. For example, when the oil temperature is at -30°C and 40°C, respectively, the oil viscosity may differ by more than 20 times. When the oil temperature is low, the increase in oil viscosity may cause the driving force of the electromagnetic coil to be unable to overcome the friction resistance, and the half-axle disconnect device may get stuck or fail to execute the action. Based on this, the present application obtains the standard resistance of the electromagnetic coil at the target temperature, and determines the input voltage, output voltage and current operating current of the electromagnetic coil when controlling the axle half-axle disconnect device to perform the disconnection action / engagement action. The target temperature of the electromagnetic coil is calculated through the resistance and temperature characteristics of the electromagnetic coil as the current operating temperature, thereby determining the current operating temperature of the axle half-axle disconnect device.

[0032] Among them, the resistance value of most metals in nature will also change with temperature. Based on this characteristic, referring to formula (1) and formula (2), the current operating temperature can be determined. is the solenoid coil input voltage; is the solenoid coil output voltage; is the current working current of the electromagnetic coil; R(T) is the current resistance of the electromagnetic coil; is the temperature coefficient of resistance; is the standard resistance value of the electromagnetic coil at the target temperature; T is the current operating temperature; T0 is the target temperature.

[0033] Formula (1) Formula (2) In some embodiments, the current operating temperature is determined based on the current resistance, target temperature and standard resistance, including: when the vehicle parking time is greater than or equal to a first preset time, obtaining a reference temperature collected by an existing temperature sensor in the vehicle; determining the coil detection temperature based on the current resistance, target temperature and standard resistance; determining the current operating temperature based on the reference temperature and the coil detection temperature.

[0034] Specifically, in a low temperature environment, the resistance value of the electromagnetic coil has a relatively concentrated variation range, that is, within the low temperature range, the resistance values ​​at different temperatures are not much different. Therefore, in a low temperature environment, a comprehensive judgment should be made in combination with the temperature detected by the existing temperature sensor in the vehicle, so as to more accurately determine the current operating temperature. In this application, when the vehicle parking time is greater than or equal to the first preset time, that is, when the vehicle is started for the first time after being parked for a long time, refer to formula (1) to determine the coil detection temperature according to the current resistance and the standard resistance, and then determine the final current operating temperature by the coil detection temperature and the target temperature. For example, the minimum value between the coil detection temperature and the target temperature can be taken as the current operating temperature, or the average value between the coil detection temperature and the target temperature can be taken as the current operating temperature, and so on. There is no restriction on this. In this way, the existing temperature sensor on the vehicle is used to assist in the judgment of the temperature of the axle half-shaft disconnect device, so that the current operating temperature of the axle half-shaft disconnect device can be accurately determined without adding an additional sensor, thereby reducing the vehicle cost.

[0035] The temperature sensor in the vehicle may be a vehicle ambient temperature sensor, an NTC temperature sensor for detecting the motor operating temperature, or a battery temperature sensor, etc., without limitation. The first preset time length may be set according to actual conditions, for example, the first preset time length may be set to 18 minutes, 19 minutes, 20 minutes, etc., without limitation.

[0036] In some embodiments, determining the current operating temperature of the axle half-shaft disconnect device includes: when the vehicle is in a powered-on state, determining the current operating temperature of the axle half-shaft disconnect device with a second preset time period as a period.

[0037] Specifically, when the vehicle is powered on, in order to ensure that the electromagnetic coil can always respond to the signal of the half-axle disconnection or connection to execute the half-axle disconnection or connection action, that is, the axle half-axle disconnection device is always in normal working condition, the working temperature of the axle half-axle disconnection device is detected every second preset time period to ensure that the current working temperature of the two adjacent monitoring points is not lower than the minimum working temperature. At the same time, it is also convenient to heat the device in time when the temperature is low, so as to ensure that the current working temperature of the axle half-axle disconnection device can always be within the safe working temperature range, thereby ensuring that the axle half-axle disconnection device can always respond and execute the disconnection action / connection action in time, effectively avoiding the problem of failure. Among them, the second preset time period can be set according to actual conditions, for example, the second preset time period is set to 2min, 4min, 5min, 6min, etc., and no specific restrictions are made here. Among them, the safe working temperature range can be set according to actual conditions, for example, refer to Figure 3 As shown, the safe operating temperature range is set to 20~60℃, and no specific restrictions are made here.

[0038] In some embodiments, the heating unit may be a separately provided unit to achieve the heating function of the axle half-shaft disconnect device, or the heating function of the axle half-shaft disconnect device may be achieved using existing equipment on the vehicle, without limitation.

[0039] For example, the heating unit is an electromagnetic coil in the axle half-axle disconnect device, and controlling the heating unit to heat the axle half-axle disconnect device includes: controlling the electromagnetic coil to be energized to heat the axle half-axle disconnect device. In other words, the disconnect device is heated to a safe operating temperature range by energizing the electromagnetic coil of the device itself, thereby reducing the viscosity of the oil, reducing the friction resistance of the electromagnet action, and saving costs. Specifically, the heat generation of the electromagnetic coil can be adjusted by controlling the working current of the electromagnetic coil and / or the duration of energization and heating, thereby realizing the heating function of the device.

[0040] In some embodiments, when controlling the power supply of the electromagnetic coil, it includes: controlling the power supply of the electromagnetic coil with the maximum allowable working current of the electromagnetic coil; determining the heating limit condition; determining the target heating time of the electromagnetic coil according to the heating limit condition and the maximum allowable working current; and controlling the electromagnetic coil according to the target heating time.

[0041] Specifically, by controlling the current passing through the electromagnetic coil to be set to the maximum allowable operating current, the resistance of the electromagnetic coil is used to generate heat to heat the axle axle disconnect device, thereby quickly reducing the viscosity of the oil, solving the problem of action jamming, and increasing the heating rate. Among them, the maximum allowable operating current can be set according to the type of electromagnetic coil, etc., and no specific restrictions are made here. In addition, if the axle axle disconnect device is heated to 100°C, it may fail. Therefore, in order to save energy and avoid the problem of failure of the axle axle disconnect device due to excessive temperature caused by long-term heating, therefore, comprehensive consideration is taken during heating, and the heating time of the heating unit should be limited to prevent overheating and failure.

[0042] In some embodiments, the heating restriction condition is that the operating temperature of the axle half-shaft disconnect device reaches a target heating temperature, wherein, at the target heating temperature, the temperature maintenance time of the axle half-shaft disconnect device after stopping heating is greater than a third preset time, wherein the temperature maintenance time is the maintenance time of the current operating temperature of the axle half-shaft disconnect device being greater than or equal to the minimum operating temperature.

[0043] Specifically, after the heating unit stops heating, taking into account both energy conservation and avoiding excessive temperature of the axle half-axle disconnect device, it should be ensured that after the axle half-axle disconnect device stops heating after reaching the target heating temperature, under natural cooling, the temperature of the axle half-axle disconnect device is greater than or equal to the minimum operating temperature and is maintained for a period of time greater than the third preset time, wherein the third preset time can be set according to actual conditions, for example, the third preset time can be set to 4 minutes, 5 minutes, 6 minutes, etc., and no specific restrictions are made here.

[0044] In some embodiments, the target heating temperature can be pre-set through a calibration test. For example, after the test axle half-axle disconnect device is heated to 40°C in a -30°C environment, the temperature can be maintained not lower than the minimum operating temperature within a third preset time period, such as 5 minutes, during natural cooling, so the target heating temperature can be set to 40°C.

[0045] In some embodiments, the target heating temperature can also be calculated in real time based on the actual heating conditions in the following manner, specifically including: determining the heat transfer coefficient, heat transfer area, equivalent heat capacity and equivalent mass of the axle half-axle disconnect device; determining the target heating temperature based on the heat transfer coefficient, heat transfer area, equivalent heat capacity, equivalent mass, a third preset time, the external ambient temperature and the minimum operating temperature.

[0046] And, determining the target heating time of the electromagnetic coil according to the heating restriction conditions includes: determining the required heating power according to the target heating temperature and the current operating temperature of the axle half-axle disconnect device before heating; determining the heat transfer coefficient and heat transfer area of ​​the axle half-axle disconnect device; determining the current resistance of the electromagnetic coil; determining the target heating time according to the maximum allowable operating current, the current resistance, the required heating power, the target heating temperature, the external ambient temperature, the heat transfer coefficient, the heat transfer area and the third preset time.

[0047] Specifically, the target heating temperature is determined according to formula (3), where T3 is the minimum operating temperature, is the third preset duration; is the equivalent heat capacity of the axle half-shaft disconnect device; is the equivalent mass of the axle half-axle disconnect device; t1 is the target heating time; h is the heat exchange coefficient between the device and the external environment; a is the heat exchange area between the device and the external environment; T amb is the ambient temperature; T1 is the target heating temperature. It should be noted that, when the vehicle is parked for a period greater than or equal to the first preset period, the minimum value between the coil detection temperature and the target temperature can be used as the current operating temperature; and when the vehicle is powered on, the current operating temperature of the axle half-axle disconnect device is determined with the second preset period as a period.

[0048] Formula (3) Referring to formula (6), the required heating power is first determined, and then the target heating time t1 of the electromagnetic coil is determined by combining formula (4) and formula (5). Wherein, t2=t1+third preset time t3; Q in is the temperature rise required for the axle half-shaft disconnect device; is the heat dissipation of the axle half-axle disconnect device within the third preset time; where (Qin-Qloss) is the required heating power. in is the heat generated by the electromagnetic coil during time t1, under which, after the device stops heating, the axle half-axle disconnect device can be kept at a temperature not lower than the minimum operating temperature during the third preset time under natural cooling, is the maximum allowable operating current, Q loss It is the heat dissipation of natural cooling within the third preset time period after heating to the target operating temperature and stopping heating.

[0049] Formula (4) Formula (5) Formula (6) A second aspect of the present invention provides a computer storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the heating control method for an axle half-axle disconnect device of the above embodiment is implemented.

[0050] A third aspect of the present invention provides a vehicle 100, such as Figure 4 As shown, the vehicle 100 includes an axle half-shaft disconnect device 10 , a heating unit 20 , and a controller 30 .

[0051] The controller 30 is connected to the axle half-shaft disconnect device 10 and the heating unit 20 respectively, and the controller 30 is used to execute the heating control method for the axle half-shaft disconnect device of the above embodiment.

[0052] According to the vehicle 100 of the embodiment of the present invention, the problem of failure of the axle half-axle disconnect device in a low temperature environment can be solved by executing the heating control method of the above embodiment through the controller.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0054] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0055] In the description of this specification, any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code including one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0056] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0057] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0058] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0059] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0060] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0062] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A heating control method for an axle half-axle disconnect device, characterized in that: include: determining a current operating temperature of the axle half-shaft disconnect device; When the current operating temperature is lower than the lowest operating temperature of the axle half-shaft disconnect device, the heating unit is controlled to heat the axle half-shaft disconnect device.

2. The heating control method for the axle half-axle disconnect device according to claim 1, characterized in that: The axle half-shaft disconnect device includes an electromagnetic coil for controlling the half-shaft disconnection / engagement, and determining the current operating temperature of the axle half-shaft disconnect device includes: determining a standard resistance of the electromagnetic coil at a target temperature; Determining the input voltage, output voltage and current working current of the electromagnetic coil when controlling the axle half-shaft disconnect device to perform a disconnection action / engagement action; determining a current resistance of the electromagnetic coil according to the input voltage, the output voltage and the current operating current; The current operating temperature is determined according to the current resistance, the target temperature and the standard resistance.

3. The heating control method for the axle half-axle disconnect device according to claim 2, characterized in that: Determining the current operating temperature according to the current resistance, the target temperature and the standard resistance includes: Under the condition that the parking time of the vehicle is greater than or equal to the first preset time, obtaining a reference temperature collected by an existing temperature sensor in the vehicle; determining a coil detection temperature according to the current resistance, the target temperature and the standard resistance; The current operating temperature is determined according to the reference temperature and the coil detection temperature.

4. The heating control method for the axle half-axle disconnect device according to claim 2, characterized in that: Determining a current operating temperature of the axle half-shaft disconnect device includes: When the vehicle is powered on, the current operating temperature of the axle half-shaft disconnect device is determined with a second preset time period as a period.

5. The heating control method for the axle half-axle disconnect device according to any one of claims 1 to 4, characterized in that: The heating unit is an electromagnetic coil in the axle half-axle disconnecting device, and controlling the heating unit to heat the axle half-axle disconnecting device includes: The electromagnetic coil is controlled to be energized to heat the axle half shaft disconnect device.

6. The heating control method for the axle half-axle disconnect device according to claim 5, characterized in that: When controlling the electromagnetic coil to be energized, the method includes: Controlling the electromagnetic coil to be energized with the maximum allowable working current of the electromagnetic coil; Determine heating constraints; Determining a target heating time of the electromagnetic coil according to the heating restriction condition and the maximum allowable working current; The electromagnetic coil is controlled according to the target heating time.

7. The heating control method for the axle half-axle disconnect device according to claim 6, characterized in that: The heating restriction condition is that the operating temperature of the axle half-axle disconnect device reaches a target heating temperature, wherein, at the target heating temperature, the temperature maintenance time of the axle half-axle disconnect device after stopping heating is greater than a third preset time, and the temperature maintenance time is the maintenance time of the current operating temperature of the axle half-axle disconnect device being greater than or equal to the minimum operating temperature.

8. The heating control method for the axle half-shaft disconnect device according to claim 7, characterized in that: The target heating temperature includes: Determining the heat transfer coefficient, heat transfer area, equivalent heat capacity and equivalent mass of the axle half-axle disconnect device; Determining the target heating temperature according to the heat exchange coefficient, the heat exchange area, the equivalent heat capacity, the equivalent mass, the third preset time, the external environment temperature and the minimum operating temperature; Determining the target heating time of the electromagnetic coil according to the heating restriction condition includes: determining a required heating power according to the target heating temperature and a current operating temperature of the axle half-shaft disconnect device before heating; determining a current resistance of the electromagnetic coil; The target heating duration is determined based on the maximum allowable operating current, the current resistance, the required heating power, the target heating temperature, the external ambient temperature, the heat exchange coefficient, the heat exchange area and the third preset duration.

9. A computer storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the heating control method for the axle half-axle disconnect device according to any one of claims 1 to 8 is implemented.

10. A vehicle, characterized in that: include: axle half-shaft disconnects and heating units; A controller, wherein the controller is connected to the axle half-shaft disconnect device and the heating unit respectively, and is used to execute the heating control method for the axle half-shaft disconnect device according to any one of claims 1 to 8.

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