Vehicle control unit temperature control method and system, storage medium and electronic equipment

Abstract

The invention discloses a vehicle control unit temperature control method and system, a storage medium and electronic equipment, and the method comprises the steps: obtaining temperature parameters and time parameters of an ECU component and a motor, and calculating an initial temperature at a power-on moment; the heat dissipating capacity and the heat increasing capacity of the ECU component and the motor are calculated, the temperature of the next moment is estimated according to the initial temperature, and an estimated temperature value is obtained; setting a temperature threshold value, comparing the estimated temperature value with the temperature threshold value to obtain a temperature grade, judging whether temperature degradation processing is needed or not, and if so, executing a temperature control processing strategy corresponding to the temperature grade; in the power-on and working process of the control unit, the temperatures of the ECU component and the motor are continuously monitored, when the temperatures exceed respective corresponding temperature threshold values, a temperature control processing strategy is executed, temperature degradation is carried out, the maximum output torque of the motor can be further limited according to the degradation level, heat accumulation is reduced, and therefore the ECU component and the motor are prevented from being damaged by high temperature.

Description

Technical Field

[0001] The present invention relates to the field of automobile chassis system control, and in particular to a vehicle control unit temperature control method, system, storage medium and electronic equipment. Background Art

[0002] In general modern vehicle control systems, the ECU (electronic control unit) is used to run the control program, and the motor acts as an actuator to respond to the ECU control. During its operation, the system generates heat, causing the temperature to rise. If the temperature is too high and exceeds a certain limit, the ECU or motor will be damaged, thus affecting the driving safety of the vehicle. Therefore, it is necessary to design a temperature control protection method to prevent the system from operating at too high a temperature and protect the ECU and motor from being damaged by high temperature.

[0003] The existing technology generally considers the ECU or motor temperature separately, and does not consider the impact of the power-off time on the initial power-on temperature. At the same time, when performing ECU temperature identification, NTC thermistors are usually used to perform corresponding conversion processing to obtain the corresponding temperature as an equivalent substitute. This type of method has high requirements on the reliability of NTC. When the corresponding signal is invalid, normal ECU temperature identification will not be possible; when performing motor temperature identification, thermal models that rely on motor structural parameters and material heat transfer characteristics are usually used to estimate the temperature of the motor stator. This type of method generally has a large amount of calculation, which reduces the robustness of the system. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a vehicle control unit temperature control method, system, storage medium and electronic device.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a vehicle control unit temperature control method, comprising:

[0006] S1: Obtain the temperature parameters and time parameters of ECU components and motors, and calculate the initial temperature at power-on time;

[0007] S2: Calculate the heat dissipation and heat rise of the ECU components and the motor, and estimate the temperature at the next moment according to the initial temperature to obtain an estimated temperature value;

[0008] S3: Setting a temperature threshold, comparing the estimated temperature value with the temperature threshold, obtaining a temperature level, determining whether temperature degradation is required, and if so, executing a temperature control strategy corresponding to the temperature level.

[0009] As a further description of the above technical solution: in step S1, it also includes:

[0010] S11: obtaining the power-off temperature of the ECU components and the motor at the power-off time, and calculating the heat dissipation time according to the ambient temperature at the power-on time;

[0011] S12: Calculate the residual temperature difference according to the heat dissipation time and the power-off time, and calculate the initial temperature according to the residual temperature difference and the ambient temperature.

[0012] As a further description of the above technical solution: in step S2, it also includes:

[0013] S21: calculating heat dissipation according to the initial temperature and the ambient temperature;

[0014] S22: Calculate the heat rise of the ECU components and the motor respectively, and estimate the temperature of the ECU components and the motor at the next moment according to the heat dissipation, heat rise and initial temperature to obtain the estimated temperature value of the ECU components and the estimated temperature value of the motor.

[0015] As a further description of the above technical solution: in step S3, it also includes:

[0016] S31: setting a plurality of temperature thresholds for the ECU components and the motor respectively to form a plurality of temperature intervals, and outputting a temperature level according to the temperature interval corresponding to the estimated temperature value;

[0017] S32: judging whether temperature degradation is required according to the temperature level, and executing a temperature control strategy if required, and maintaining power-on operation if not required.

[0018] As a further description of the above technical solution: the temperature control processing strategy includes:

[0019] If the estimated temperature value is less than the minimum temperature threshold, the power supply remains on;

[0020] If the estimated temperature value is greater than the maximum temperature threshold, the power is turned off;

[0021] If the estimated temperature value is between a minimum temperature threshold and a maximum temperature threshold, the output power of the motor is limited.

[0022] As a further description of the above technical solution: after executing the temperature control processing strategy, return to step S2 to determine whether the estimated temperature value is less than the minimum temperature threshold. If so, complete the temperature degradation process and output the temperature level. If not, execute the temperature control processing strategy again.

[0023] As a further description of the above technical solution: when the estimated temperature values ​​of several ECU components are calculated, the maximum value is selected as the estimated temperature value, and when the temperature control processing strategy is executed according to the estimated temperature value, a delay hysteresis processing is adopted.

[0024] Also included is a vehicle control unit temperature control system, the temperature control system is applicable to any temperature control method described in the above technical solution, including:

[0025] The sensing module monitors the temperature at power-on and power-off times to obtain temperature parameters;

[0026] Saving module, saving temperature parameters and time parameters;

[0027] A calculation module, which calculates the initial temperature at the power-on moment and the estimated temperature value at the next moment according to the temperature parameter and the time parameter;

[0028] A control module executes a corresponding temperature control processing strategy according to a temperature range corresponding to the estimated temperature value;

[0029] Output module, outputs the corresponding temperature level.

[0030] It also includes a computer-readable storage medium storing a computer program for running the temperature control method, wherein the computer program enables a computer to execute the temperature control method as described in any one of the above technical solutions.

[0031] Also included is an electronic device, comprising:

[0032] one or more processors; memory; and

[0033] One or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the programs include a method for executing a temperature control method as described in any one of the above technical solutions.

[0034] The above technical solution has the following advantages or beneficial effects:

[0035] 1. When the control unit is powered on and working, the temperature of the ECU components and the motor is continuously monitored. When the temperature exceeds the corresponding temperature threshold, the temperature control processing strategy will be executed to perform temperature degradation. The maximum output torque of the motor can be further limited according to the degradation level to reduce heat accumulation, thereby preventing the ECU components and the motor from being damaged by high temperature.

[0036] 2. When the power is turned off, the temperature parameters at the time of power off are monitored and saved. According to the actual power off time and the influence of the residual temperature difference, the risk of damage to ECU components and motors caused by initial temperature calculation errors due to power on again shortly after high temperature power off is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 The process of the temperature control method proposed by the present invention is Figure 1 ;

[0039] Figure 2 The process of the temperature control method proposed by the present invention is Figure 2 ;

[0040] Figure 3 The process of the temperature control method proposed by the present invention is Figure 3 ;

[0041] Figure 4 The process of the temperature control method proposed by the present invention is Figure 4 ;

[0042] Figure 5 This is a schematic diagram of the structure of the temperature control system proposed by the present invention.

[0043] Legend:

[0044] 1. Sensing module; 2. Storage module; 3. Calculation module; 4. Control module; 5. Output module. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Reference Figure 1 , an embodiment of the present invention provides: a vehicle control unit temperature control method, comprising:

[0047] S1: Obtain the temperature parameters and time parameters of ECU components and motors, and calculate the initial temperature at power-on time;

[0048] S2: Calculate the heat dissipation and heat rise of ECU components and motors, estimate the temperature at the next moment based on the initial temperature, and obtain the estimated temperature value;

[0049] S3: Set a temperature threshold, compare the estimated temperature value with the temperature threshold, obtain the temperature level, determine whether temperature degradation is required, and if necessary, execute the temperature control processing strategy corresponding to the temperature level.

[0050] In this embodiment, the ambient temperature and the temperature of the ECU components and the motor at the last time the product was powered off, which are stored in the memory of the control unit, are used to obtain the heat dissipation time during the power-off period. Then, based on the actual power-off time of the product, the initial temperature of the ECU components and the motor at the current power-on time is calculated to complete the initialization calculation.

[0051] Then, based on the calculated initial temperature, combined with the heat dissipation and heat rise characteristics of the ECU components and motors, the respective temperatures are estimated to obtain estimated temperature values, and corresponding temperature degradation processing is performed to obtain the temperature degradation levels of the ECU components and motors of the control unit. In actual estimation, the MOS tube with a higher temperature is used as the estimation object of the ECU components, and the stator temperature of the motor is estimated as the internal temperature of the motor.

[0052] Reference Figure 2 , in step S1, further comprising:

[0053] S11: obtaining the power-off temperature of the ECU components and the motor at the power-off time, and calculating the heat dissipation time according to the ambient temperature at the power-on time;

[0054] S12: Calculate the residual temperature difference according to the heat dissipation time and the power-off time, and calculate the initial temperature according to the residual temperature difference and the ambient temperature.

[0055] In this embodiment, the control unit and the motor will cool naturally during the power-off process, and will eventually cool to a state consistent with the ambient temperature after a certain period of time. When the difference between the maximum temperature of the control unit and the motor at the time of power-on and power-off is large and the ambient temperature, if the power is turned on again after powering off, the actual temperature drop should be small, and the MOS tube of the control unit and the motor temperature should still be large different from the ambient temperature. If the influence of the actual power-off time is not considered, the temperature estimation initialization calculation at the time of power-on is performed, and powering on again within a short time after powering off will cause a large deviation between the initial temperature and the actual temperature. Subsequent estimation at the wrong initial temperature may cause the temperature protection function to fail to trigger normally, thereby bringing the risk of hardware damage. Therefore, when performing temperature estimation, it is necessary to consider the influence of the heat dissipation time after the power-off moment, and perform temperature estimation initialization calculation at the time of power-on.

[0056] Record the temperature of the control unit MOS tube and motor at the last power-off time, and calculate the required cooling time from the residual temperature at the last power-off time to the ambient temperature at the current power-on time in combination with the ambient temperature at the current power-on time. The relationship between the required cooling time and the actual temperature difference can be obtained based on the actual test cooling characteristics of the control unit MOS tube and motor. The cooling time calculation formula is:

[0057]

[0058] where t cool is the required heat dissipation time, a1, b1, c1, d1 are fitting coefficients, T off is the temperature at the last power-off time, is the ambient temperature at power-on time.

[0059] Furthermore, by combining the actual power-off heat dissipation time with the ambient temperature at the initial power-on time, the initial temperature of the control unit MOS tube and the motor stator at the initial power-on time can be obtained:

[0060]

[0061] Where ΔT init is the residual temperature difference at the initial power-on moment, a2, b2, c2, d2 are fitting coefficients, t off The power-off time.

[0062] Reference Figure 3 , in step S2, further comprising:

[0063] S21: Calculate heat dissipation according to the initial temperature and the ambient temperature;

[0064] S22: Calculate the heat rise of the ECU components and the motor respectively, estimate the temperature of the ECU components and the motor at the next moment according to the heat dissipation, the heat rise and the initial temperature, and obtain the estimated temperature value of the ECU components and the estimated temperature value of the motor.

[0065] In this embodiment, during the operation of the control unit, the heat generation and heat dissipation of the MOS tube and the motor are affected by the input and output power and the ambient temperature, and are in a dynamic change process. When estimating the temperature, it can be considered that the heat generation and heat dissipation are in a constant state in a very short period, and the temperature value at the next moment can be estimated based on the state at the current moment. The temperature estimation equation is:

[0066] T(k+1)=T(k)-T cool +T heat

[0067] Where T(k+1) is the estimated temperature value at time k+1 (the next time) based on the initial temperature T(k) estimated at time k (the current time), T coolis the heat dissipation from time k to time k+1, T heat is the heat rise from time k to time k+1.

[0068] For temperature estimation, the heat dissipation T cool It is mainly affected by the difference between the initial temperature and the ambient temperature at the current moment. The heat dissipation model can be obtained by fitting the data according to the experimental data. In the fitting process, multi-segment fitting can be performed according to the actual data distribution state. The general relationship between the heat dissipation and the temperature difference in each segment is:

[0069]

[0070] where a i is the fitting coefficient, T e (k) is the ambient temperature at time k.

[0071] For the temperature estimation of the MOS tube of the control unit, the heat rise T heat Mainly determined by the current passing through each MOS:

[0072] T heat =k1I 2 (k)

[0073] Where k1 is the heating coefficient, I 2 (k) is the square of the MOS current at time k.

[0074] For the estimation of motor stator temperature, the motor will be in dynamic change, and its heat rise T heat Mainly determined by input power and output power:

[0075] T heat =k2*(U d (k)×I d (k)+U q (k)×I q (k)-T(k)×n(k))

[0076] Among them, k2 is the heating coefficient, U d (k), I d (k), U q (k), I q (k) are the voltage and current of the motor d-axis and q-axis at time k, respectively; T(k) is the actual torque of the motor at time k; and n(k) is the actual speed of the motor at time k.

[0077] Reference Figure 4 , in step S3, further comprising:

[0078] S31: setting a number of temperature thresholds for the ECU components and the motor respectively to form a number of temperature intervals, and outputting a temperature level according to the temperature interval corresponding to the estimated temperature value;

[0079] S32: judging whether temperature degradation is required according to the temperature level, and executing the temperature control strategy if required, and maintaining power-on operation if not required.

[0080] Temperature control strategies include:

[0081] If the estimated temperature value is less than the minimum temperature threshold, the power supply remains on;

[0082] If the estimated temperature value is greater than the maximum temperature threshold, the power is turned off;

[0083] If the estimated temperature value is between the minimum temperature threshold and the maximum temperature threshold, the output power of the motor is limited.

[0084] In a specific embodiment, in response to the degradation of the control unit MOS tube, three levels of temperature thresholds are set according to the actual heat resistance of the hardware, from small to large, namely MosTempLimit1, MosTempLimit2 and MosTempLimit3. When the estimated control unit MOS tube temperature is below MosTempLimit1, it is considered that the components in the control unit ECU can operate normally at this temperature without damage, and the control unit ECU temperature level is the default state 0. When the estimated control unit temperature is between MosTempLimit1 and MosTempLimit2, or between MosTempLimit2 and MosTempLimit3, it is considered that the control unit temperature is high, and the control unit ECU temperature levels are sent as 1 and 2 respectively. When the estimated control unit temperature is greater than MosTempLimit3, it is considered that the control unit ECU temperature is too high, and continuing this temperature may directly cause damage to related hardware. At this time, the control unit ECU temperature level is sent as 3.

[0085] In response to motor temperature degradation, consistent with the control unit MOS tube degradation logic, three levels of temperature thresholds are set. When the estimated motor temperature is in the corresponding range, the corresponding levels 0, 1, 2 and 3 are sent.

[0086] During the operation of the control unit, the temperature degradation level of the control unit MOS tube and the motor temperature degradation level will be comprehensively processed, and the final temperature level will be output according to the principle of taking the larger one. When the final temperature level is 0, it is considered that the control unit is in the normal operating temperature range and the motor can work at its maximum capacity. When the temperature level is degraded to 1 or 2, the system should limit the motor output capacity to reduce heat accumulation, where the motor capacity limit corresponding to degradation 2 is greater than the motor capacity limit corresponding to degradation 1. When the temperature level is 3, the maximum output capacity of the motor should be limited to zero to prevent the temperature from being maintained or further increased, thereby protecting the control unit ECU and the motor from being damaged by high temperature.

[0087] After executing the temperature control processing strategy, return to step S2 to determine whether the estimated temperature value is less than the minimum temperature threshold. If yes, complete the temperature degradation process and output the temperature level. If no, execute the temperature control processing strategy again.

[0088] In this embodiment, the temperature is continuously monitored. If the temperature exceeds the normal operating range, the temperature is continuously monitored and downgraded until the temperature required for normal operating is met.

[0089] When the estimated temperature values ​​of several ECU components are calculated, the maximum value is selected as the estimated temperature value, and when the temperature control processing strategy is executed according to the estimated temperature value, a delay hysteresis processing is adopted.

[0090] In this embodiment, the maximum value is selected as the estimated temperature value to avoid temperature errors caused by calculation errors during subsequent temperature adjustments, which may affect the use of ECU components and motors. Delay hysteresis processing is designed to avoid fluctuations in the estimated temperature near the temperature threshold, which may cause frequent changes in the output temperature level.

[0091] Reference Figure 5 , and also includes an embodiment of a vehicle control unit temperature control system, the temperature control system is applicable to any temperature control method in the above technical solution, including:

[0092] The sensing module 1 monitors the temperature at the power-on and power-off times to obtain temperature parameters;

[0093] Saving module 2, saving temperature parameters and time parameters;

[0094] Calculation module 3, calculates the initial temperature at the power-on time and the estimated temperature value at the next time according to the temperature parameter and the time parameter;

[0095] Control module 4, executes a corresponding temperature control processing strategy according to the temperature range corresponding to the estimated temperature value;

[0096] The output module 5 outputs the corresponding temperature level.

[0097] It is understandable that the temperature control system provided in the embodiment of the present invention corresponds to the above-mentioned temperature control method, and the explanations, examples, beneficial effects and other parts of the relevant contents can refer to the corresponding contents in the temperature control method, which will not be repeated here.

[0098] In another embodiment, a computer-readable storage medium is further included, which stores a computer program for running the temperature control method, wherein the computer program enables a computer to execute the following steps:

[0099] S1: Obtain the temperature parameters and time parameters of ECU components and motors, and calculate the initial temperature at power-on time;

[0100] S2: Calculate the heat dissipation and heat rise of ECU components and motors, estimate the temperature at the next moment based on the initial temperature, and obtain the estimated temperature value;

[0101] S3: Set a temperature threshold, compare the estimated temperature value with the temperature threshold, obtain the temperature level, determine whether temperature degradation is required, and if necessary, execute the temperature control processing strategy corresponding to the temperature level.

[0102] Among them, the computer-readable storage medium can be a computer storage medium or a communication medium. The communication medium includes any medium that facilitates the transmission of a computer program from one place to another. The computer storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer. For example, a computer-readable storage medium is coupled to a processor so that the processor can read information from the computer-readable storage medium and write information to the computer-readable storage medium. Of course, the computer-readable storage medium can also be a component of the processor. The processor and the computer-readable storage medium can be located in an application-specific integrated circuit (ASIC). In addition, the ASIC can be located in a user device. Of course, the processor and the computer-readable storage medium can also exist in a communication device as discrete components.

[0103] Specifically, the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0104] In another embodiment, an electronic device is also included, including:

[0105] one or more processors; memory; and

[0106] One or more programs, wherein the one or more programs are stored in the memory and configured to be executed by one or more processors, the programs comprising steps for performing the following steps:

[0107] S1: Obtain the temperature parameters and time parameters of ECU components and motors, and calculate the initial temperature at power-on time;

[0108] S2: Calculate the heat dissipation and heat rise of ECU components and motors, estimate the temperature at the next moment based on the initial temperature, and obtain the estimated temperature value;

[0109] S3: Set a temperature threshold, compare the estimated temperature value with the temperature threshold, obtain the temperature level, determine whether temperature degradation is required, and if necessary, execute the temperature control processing strategy corresponding to the temperature level.

[0110] Memory is used to store computer programs. The memory may include high-speed random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk memory, and may also be a USB flash drive, a mobile hard disk, a read-only memory, a disk or an optical disk.

[0111] A processor is used to execute a computer program stored in a memory to implement the temperature control method in the above embodiment. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in the invention may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0112] Optionally, the memory can be independent or integrated with the processor.

[0113] When the memory is a device independent of the processor, the electronic device may further include a bus. The bus is used to connect the memory and the processor. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. The bus may be divided into an address bus, a data bus, a control bus, and the like.

[0114] It should be noted that, through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment. In this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. Without more constraints, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

[0115] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle control unit temperature control method, characterized in that: include: S1: Obtain the temperature parameters and time parameters of ECU components and motors, and calculate the initial temperature at power-on time; S2: Calculate the heat dissipation and heat rise of the ECU components and the motor, and estimate the temperature at the next moment according to the initial temperature to obtain an estimated temperature value; S3: Setting a temperature threshold, comparing the estimated temperature value with the temperature threshold, obtaining a temperature level, determining whether temperature degradation is required, and if so, executing a temperature control strategy corresponding to the temperature level.

2. The temperature control method according to claim 1, characterized in that: In step S1, it also includes: S11: obtaining the power-off temperature of the ECU components and the motor at the power-off time, and calculating the heat dissipation time according to the ambient temperature at the power-on time; S12: Calculate the residual temperature difference according to the heat dissipation time and the power-off time, and calculate the initial temperature according to the residual temperature difference and the ambient temperature.

3. The temperature control method according to claim 2, characterized in that: In step S2, it also includes: S21: calculating heat dissipation according to the initial temperature and the ambient temperature; S22: Calculate the heat rise of the ECU components and the motor respectively, and estimate the temperature of the ECU components and the motor at the next moment according to the heat dissipation, heat rise and initial temperature to obtain the estimated temperature value of the ECU components and the estimated temperature value of the motor.

4. The temperature control method according to claim 1, characterized in that: In step S3, it also includes: S31: setting a plurality of temperature thresholds for the ECU components and the motor respectively to form a plurality of temperature intervals, and outputting a temperature level according to the temperature interval corresponding to the estimated temperature value; S32: judging whether temperature degradation is required according to the temperature level, and executing a temperature control strategy if required, and maintaining power-on operation if not required.

5. The temperature control method according to claim 1, characterized in that: The temperature control processing strategy includes: If the estimated temperature value is less than the minimum temperature threshold, the power supply remains on; If the estimated temperature value is greater than the maximum temperature threshold, the power is turned off; If the estimated temperature value is between a minimum temperature threshold and a maximum temperature threshold, the output power of the motor is limited.

6. The temperature control method according to claim 5, characterized in that: After executing the temperature control processing strategy, return to step S2 to determine whether the estimated temperature value is less than the minimum temperature threshold. If yes, complete the temperature degradation process and output the temperature level. If no, execute the temperature control processing strategy again.

7. The temperature control method according to claim 1, characterized in that: When the estimated temperature values ​​of several ECU components are calculated, the maximum value is selected as the estimated temperature value, and when the temperature control processing strategy is executed according to the estimated temperature value, a delay hysteresis processing is adopted.

8. A vehicle control unit temperature control system, characterized in that: The temperature control system is applicable to the temperature control method according to any one of claims 1 to 7, comprising: The sensing module monitors the temperature at power-on and power-off times to obtain temperature parameters; Saving module, saving temperature parameters and time parameters; A calculation module, which calculates the initial temperature at the power-on moment and the estimated temperature value at the next moment according to the temperature parameter and the time parameter; A control module executes a corresponding temperature control processing strategy according to a temperature range corresponding to the estimated temperature value; Output module, outputs the corresponding temperature level.

9. A computer-readable storage medium, characterized in that: It stores a computer program for running the temperature control method, wherein the computer program enables a computer to execute the temperature control method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: include: one or more processors; Memory; as well as One or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, the programs including instructions for executing the temperature control method according to any one of claims 1 to 7.

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