Lubricating oil temperature adjusting method, device, equipment, medium, product and vehicle

Abstract

The invention relates to a lubricating oil temperature adjusting method, device and equipment, a medium, a product and a vehicle, and relates to the technical field of heat management. The technical problem that the electric driving efficiency of an electric driving system in the related technology is low is at least solved. The method includes: acquiring a running state of a vehicle; and under the condition that the running state of the vehicle is the pre-starting state, the temperature of the lubricating oil is adjusted based on the temperature of the lubricating oil of the vehicle and the environment temperature so that the temperature of the lubricating oil can reach the first temperature, and the first temperature is determined based on the characteristic parameters of the lubricating oil. The electric driving efficiency of the electric driving system can be improved.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and in particular to a lubricating oil temperature regulation method, device, equipment, medium, product and vehicle. Background Art

[0002] With the rapid development and popularization of new energy vehicles, new energy vehicles have become an important means of transportation for achieving sustainable development in the transportation field. Among them, the electric drive system is the core component of new energy vehicles, and the electric drive efficiency is the core indicator for judging the performance of the electric drive system. However, when the vehicle starts, the lubricating oil temperature is low, especially under low temperature conditions. At this time, the lubricating oil temperature is low and the viscosity is large, resulting in large oil stirring losses, which affects the operating efficiency of the vehicle during the startup phase. The current measures to improve the efficiency of the electric drive include: reducing the thickness of the motor silicon steel sheet, reducing the switching frequency of the power module, optimizing the resistance, reducing the viscosity of the reducer lubricating oil, and improving the cooling efficiency. Improving the efficiency of the electric drive can reduce power consumption, reduce the cost of using the vehicle, or reduce the total battery capacity and reduce the cost of the vehicle. Therefore, it is necessary to continuously improve the efficiency of the electric drive system.

[0003] In the related art, patent CN 114056109 A heats the lubricating oil passing through the motor by blocking the motor during the car warm-up process, thereby increasing the temperature of the lubricating oil and reducing the viscosity of the lubricating oil, thereby reducing the oil stirring loss and drag loss of the car and improving the low-temperature transmission efficiency of the car. This technical solution mainly blocks the motor to heat the motor by warming up the car, thereby generating heat to heat the lubricating oil. Although this method can increase the temperature of the lubricating oil, reduce the viscosity of the lubricating oil, and improve the subsequent electric drive efficiency of the electric drive system. However, since the motor is blocked and the motor is heated to heat the lubricating oil, a large amount of battery power is consumed. Therefore, considering the power consumption during warm-up and vehicle driving, it may not necessarily improve the electric drive efficiency of the electric drive system. Therefore, the electric drive efficiency of the electric drive system of current new energy vehicles is relatively low.

[0004] In another related technology, patent CN 213361043 U improves the electric drive efficiency through a solenoid valve, an oil temperature sensor, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a VCU. Specifically, one end of the first pipeline is connected to the circulating cooling system, and the other end of the first pipeline is connected to the water inlet pipe of the electric control; the inlet end of the solenoid valve is arranged on the outlet pipe of the motor cooling water channel, the first outlet end of the solenoid valve is connected to the circulating cooling system through the second pipeline, and the second outlet end of the solenoid valve is connected to the inlet of the reducer water channel through the third pipeline; the outlet of the reducer water channel is connected to the circulating cooling system through the fourth pipeline; the oil temperature sensor is used to detect the temperature of the lubricating oil inside the reducer and send it to the VCU; the VCU is electrically connected to the oil temperature sensor and the solenoid valve respectively, and the VCU controls the operation of the solenoid valve based on the lubricating oil temperature detected by the oil temperature sensor. Thus, by heating the lubricating oil inside the reducer, the viscosity of the lubricating oil is reduced. What is disclosed is only a specific lubricating oil heating device, and it does not explain how to control the process of heating the lubricating oil. Therefore, it is not clear how to improve the electric drive efficiency of the electric drive system. Summary of the invention

[0005] The present application provides a lubricating oil temperature regulation method, device, equipment, medium, product and vehicle. The purpose of the present application is to at least solve the technical problem of low electric drive efficiency of the electric drive system in the related technology.

[0006] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0007] According to the first aspect provided by the present application, a method for regulating the temperature of lubricating oil is provided, the method comprising: obtaining the operating state of a vehicle; when the operating state of the vehicle is a pre-start state, regulating the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle so that the temperature of the lubricating oil reaches a first temperature, wherein the first temperature is determined based on characteristic parameters of the lubricating oil.

[0008] According to the above technical means, the present application can adjust the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle when the vehicle is in the pre-start state, so that the temperature of the lubricating oil reaches a first temperature determined based on the characteristic parameters of the lubricating oil. In this way, the temperature of the lubricating oil can be adjusted when the vehicle is in the pre-start state. That is, based on this solution, the temperature of the lubricating oil can be pre-adjusted (heated) before the vehicle starts to travel, so that the temperature of the lubricating oil reaches a suitable temperature. Therefore, when the vehicle starts to run, the temperature of the lubricating oil has reached a suitable temperature, thereby improving the electric drive efficiency of the electric drive system when the vehicle is running.

[0009] In a possible implementation, the above-mentioned adjusting the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle so that the temperature of the lubricating oil reaches a first temperature includes: when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature, heating the lubricating oil so that the temperature of the lubricating oil reaches the first temperature, the second temperature being determined based on characteristic parameters of the lubricating oil, and the second temperature is lower than the first temperature.

[0010] According to the above technical means, the present application can heat the lubricating oil again when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature, so that the temperature of the lubricating oil reaches the first temperature. In this way, when the temperature of the lubricating oil is lower than the first temperature, it means that the temperature of the lubricating oil is lower and will affect the electric drive efficiency, and the ambient temperature is lower than the second temperature, which means that the ambient temperature is also lower, which will cause the temperature of the lubricating oil to rise more slowly. Therefore, it is necessary to heat the lubricating oil in this case so that the temperature of the lubricating oil reaches the first temperature faster, thereby improving the electric drive efficiency of the electric drive system when the vehicle is running.

[0011] In a possible embodiment, the method also includes: when the motor speed of the vehicle is less than a preset speed and the stator temperature of the motor is less than a third temperature, maintaining the temperature of the lubricating oil in a first temperature range, the third temperature being determined based on characteristic parameters of the motor, and the first temperature range being determined based on the first temperature.

[0012] According to the above technical means, the present application can further judge the motor speed and the stator temperature of the motor of the vehicle, so that when the motor speed of the vehicle is less than the preset speed and the stator temperature of the motor is less than the third temperature determined based on the characteristic parameters of the motor, the temperature of the lubricating oil is maintained in the first temperature range. In this way, when the motor speed is low, that is, when the vehicle has not started to drive or has just started to drive and the speed is slow, if the stator temperature of the motor is low, the temperature of the lubricating oil can be maintained, thereby ensuring that the temperature of the lubricating oil is in a suitable temperature range, so as to ensure that the electric drive efficiency of the electric drive system is at a high efficiency when the vehicle is running.

[0013] In one possible embodiment, the above-mentioned heating of the lubricating oil so that the temperature of the lubricating oil reaches a first temperature includes: heating the lubricating oil based on the maximum heating power of the heat exchange device of the vehicle; determining a first heating time, the first heating time being the time consumed to heat the temperature of the lubricating oil to the first temperature based on the maximum heating power; when the first heating time is greater than the first time, heating the coolant in the heat exchange device by a heater so that the temperature of the lubricating oil reaches the first temperature within a first time, the first time being determined based on the second temperature.

[0014] According to the above technical means, the present application can heat the lubricating oil with the maximum heating power of the heat exchange device when heating the lubricating oil, and determine the first heating time consumed to heat the temperature of the lubricating oil to the first temperature under the maximum heating power. If the first heating time is longer than the first time, it means that even if the lubricating oil is heated with the maximum heating power of the heat exchange device, the time consumed is also long, so it is necessary to heat the coolant in the heat exchange device by the heater so that the temperature of the lubricating oil reaches the first temperature within the first time. In this way, the temperature of the lubricating oil can be quickly heated to a suitable temperature in a shorter time, thereby ensuring that the electric drive efficiency of the electric drive system is at a higher efficiency when the vehicle is running.

[0015] In a possible implementation, the method further includes: heating the lubricating oil to a first temperature when the first heating duration is less than or equal to the first duration.

[0016] According to the above technical means, the present application can directly heat the lubricating oil when the time consumed by heating the lubricating oil to the first temperature at the maximum heating power of the heat exchange device is short, without heating the coolant in the heat exchange device through the heater, thereby saving the energy consumed when heating the lubricating oil.

[0017] In a possible embodiment, the above-mentioned heating of the coolant in the heat exchange device by the heater includes: heating the coolant in the heat exchange device by the heater with a target power, the target power is determined based on a target temperature difference and a target time, the target temperature difference is the difference between the first temperature and the temperature of the lubricating oil, the target time is the difference between the first time and the second heating time, and the second heating time is the time for which the lubricating oil has been heated.

[0018] According to the above technical means, the present application can determine the target power based on the difference between the first temperature and the temperature of the lubricating oil, and the difference between the first duration and the duration for which the lubricating oil has been heated, when the coolant in the heat exchange device is heated by the heater. Thus, the coolant in the heat exchange device is heated by the heater at the target power. In this way, it can be ensured that the coolant in the heat exchange device is heated at an appropriate power, so that the heat exchange device heats the temperature of the lubricating oil to the first temperature within the first duration. The coolant in the heat exchange device will not be excessively heated, thereby saving the consumed energy.

[0019] In a possible embodiment, the method also includes: when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is greater than or equal to the second temperature, heating the lubricating oil by a heat exchange device of the vehicle; when a heating parameter for heating the lubricating oil satisfies a preset condition, stopping heating the lubricating oil, and the heating parameter satisfies the preset condition as any one of the following: the temperature of the lubricating oil is greater than or equal to the first temperature, and the heating time of the lubricating oil is greater than a second time, the second time is determined based on a pre-start time of the vehicle, and the pre-start time is the time between when the vehicle starts to be powered on and when the vehicle starts to drive.

[0020] According to the above technical means, the present application can heat the lubricating oil only through the heat exchange device when the temperature of the lubricating oil is lower than the first temperature but the ambient temperature is greater than or equal to the second temperature. In this way, when the ambient temperature is greater than or equal to the second temperature, it means that the ambient temperature is not particularly low, and the temperature of the lubricating oil can be quickly increased by heating the lubricating oil only through the heat exchange device. In addition, by judging whether the heating parameters meet the preset conditions, it is determined whether to stop heating the lubricating oil. The heating of the lubricating oil can be stopped when the temperature of the lubricating oil is greater than or equal to the first temperature, or when the heating time of the lubricating oil is greater than the second time. In this way, when heating the lubricating oil, the temperature of the lubricating oil will not be excessively increased, or the energy will not be wasted by heating the lubricating oil for a long time, thereby saving the consumed energy.

[0021] In a possible embodiment, the upper limit of the first temperature interval is determined based on the sum of the first temperature and a preset temperature difference, and the lower limit of the first temperature interval is determined based on the difference between the first temperature and the preset temperature difference; the above-mentioned maintaining the temperature of the lubricating oil in the first temperature interval includes: heating the lubricating oil when the temperature of the lubricating oil is less than the lower limit of the first temperature interval; and stopping heating the lubricating oil when the temperature of the lubricating oil is greater than the upper limit of the first temperature interval.

[0022] According to the above technical means, the present application can determine the first temperature range according to the first temperature, so as to constantly maintain the temperature of the lubricating oil in the first temperature range, thereby ensuring that the electric drive efficiency of the electric drive system is at a higher efficiency when the vehicle is running.

[0023] In a possible implementation manner, the pre-start state is any one of the following: the vehicle is unlocked, the vehicle is switched from a power-off state to a power-on state and the vehicle speed is 0, the vehicle is locked and the air conditioner is turned on.

[0024] According to the above technical means, the present application can determine whether the vehicle is in the pre-start state through various parameter conditions, thereby accurately determining the running state of the vehicle. It is ensured that the temperature of the lubricating oil is adjusted only when the vehicle is not in the pre-start state, thereby improving the accuracy of adjusting the temperature of the lubricating oil.

[0025] According to the second aspect provided by the present application, a lubricating oil temperature regulating device is provided, the lubricating oil temperature regulating device comprising: an acquisition module and a processing module; the acquisition module is used to acquire the operating state of a vehicle; the processing module is used to regulate the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle when the operating state of the vehicle is a pre-start state, so that the temperature of the lubricating oil reaches a first temperature, and the first temperature is determined based on the characteristic parameters of the lubricating oil.

[0026] In one possible embodiment, the processing module is specifically used to heat the lubricating oil when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature, so that the temperature of the lubricating oil reaches the first temperature, and the second temperature is determined based on the characteristic parameters of the lubricating oil, and the second temperature is lower than the first temperature.

[0027] In one possible embodiment, the processing module is also used to maintain the temperature of the lubricating oil in a first temperature range when the motor speed of the vehicle is less than a preset speed and the stator temperature of the motor is less than a third temperature, wherein the third temperature is determined based on characteristic parameters of the motor and the first temperature range is determined based on the first temperature.

[0028] In one possible embodiment, the processing module is specifically used to heat the lubricating oil based on the maximum heating power of the heat exchange device of the vehicle; the processing module is specifically used to determine a first heating time, the first heating time being the time consumed to heat the temperature of the lubricating oil to a first temperature based on the maximum heating power; the processing module is specifically used to heat the coolant in the heat exchange device by a heater when the first heating time is greater than the first time, so that the temperature of the lubricating oil reaches the first temperature within a first time, the first time being determined based on the second temperature.

[0029] In a possible implementation, the processing module is further configured to heat the lubricating oil to a first temperature when the first heating duration is less than or equal to the first duration.

[0030] In one possible embodiment, the processing module is specifically used to heat the coolant in the heat exchange device through a heater with a target power, where the target power is determined based on a target temperature difference and a target duration, where the target temperature difference is the difference between a first temperature and the temperature of the lubricating oil, and the target duration is the difference between the first duration and a second heating duration, and the second heating duration is the duration for which the lubricating oil has been heated.

[0031] In one possible embodiment, the processing module is further used to heat the lubricating oil through a heat exchange device of the vehicle when the temperature of the lubricating oil is lower than a first temperature and the ambient temperature is greater than or equal to a second temperature; the processing module is further used to stop heating the lubricating oil when a heating parameter for heating the lubricating oil satisfies a preset condition, and the heating parameter satisfies the preset condition if any one of the following is true: the temperature of the lubricating oil is greater than or equal to the first temperature, and the heating time of the lubricating oil is greater than a second time, the second time is determined based on a pre-start time of the vehicle, and the pre-start time is the time between when the vehicle starts to be powered on and when the vehicle starts to drive.

[0032] In a possible embodiment, the upper limit of the first temperature interval is determined according to the sum of the first temperature and a preset temperature difference, and the lower limit of the first temperature interval is determined according to the difference between the first temperature and the preset temperature difference; the processing module is specifically used to heat the lubricating oil when the temperature of the lubricating oil is less than the lower limit of the first temperature interval; the processing module is specifically used to stop heating the lubricating oil when the temperature of the lubricating oil is greater than the upper limit of the first temperature interval.

[0033] In a possible implementation manner, the pre-start state is any one of the following: the vehicle is unlocked, the vehicle is switched from a power-off state to a power-on state and the vehicle speed is 0, the vehicle is locked and the air conditioner is turned on.

[0034] According to the third aspect provided by the present application, an electronic device is provided, comprising: a processor; a memory for storing processor executable instructions; wherein the processor is configured to execute instructions to implement the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0035] According to the fourth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation method thereof.

[0036] According to the fifth aspect provided by the present application, a computer program product is provided, the computer program product comprising computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0037] According to a sixth aspect provided by the present application, a vehicle is provided, the vehicle comprising a lubricating oil temperature regulating device as in the second aspect, and the vehicle is used to implement the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0038] Therefore, the above technical features of the present application have the following beneficial effects:

[0039] (1) The present application can adjust the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle when the vehicle is in the pre-start state, so that the temperature of the lubricating oil reaches a first temperature determined based on the characteristic parameters of the lubricating oil. In this way, the temperature of the lubricating oil can be adjusted when the vehicle is in the pre-start state. That is, based on this solution, the temperature of the lubricating oil can be pre-adjusted (heated) before the vehicle starts to travel, so that the temperature of the lubricating oil reaches a suitable temperature. Therefore, when the vehicle starts to run, the temperature of the lubricating oil has reached a suitable temperature, thereby improving the electric drive efficiency of the electric drive system when the vehicle is running.

[0040] (2) The present application can heat the lubricating oil again when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature, so that the temperature of the lubricating oil reaches the first temperature. In this way, when the temperature of the lubricating oil is lower than the first temperature, it means that the temperature of the lubricating oil is lower and will affect the electric drive efficiency, and when the ambient temperature is lower than the second temperature, it means that the ambient temperature is also lower, which will cause the temperature of the lubricating oil to rise more slowly. Therefore, it is necessary to heat the lubricating oil in this case so that the temperature of the lubricating oil reaches the first temperature faster, thereby improving the electric drive efficiency of the electric drive system when the vehicle is running.

[0041] (3) The present application can further determine the motor speed and stator temperature of the motor of the vehicle, so that when the motor speed of the vehicle is less than the preset speed and the stator temperature of the motor is less than the third temperature determined based on the characteristic parameters of the motor, the temperature of the lubricating oil is maintained in the first temperature range. In this way, when the motor speed is relatively low, that is, when the vehicle has not started to move or has just started to move and the speed is relatively slow, if the stator temperature of the motor is relatively low, the temperature of the lubricating oil can be maintained, thereby ensuring that the temperature of the lubricating oil is within a suitable temperature range, so as to ensure that the electric drive efficiency of the electric drive system is at a relatively high efficiency when the vehicle is running.

[0042] (4) When heating the lubricating oil, the present application can heat the lubricating oil with the maximum heating power of the heat exchange device, and determine the first heating time consumed to heat the temperature of the lubricating oil to the first temperature at the maximum heating power. If the first heating time is longer than the first time, it means that even if the lubricating oil is heated with the maximum heating power of the heat exchange device, the time consumed is relatively long, so it is necessary to heat the coolant in the heat exchange device by a heater so that the temperature of the lubricating oil reaches the first temperature within the first time. In this way, the temperature of the lubricating oil can be quickly heated to a suitable temperature in a relatively short time, thereby ensuring that the electric drive efficiency of the electric drive system is at a higher efficiency when the vehicle is running.

[0043] (5) The present application can directly heat the lubricating oil when the time consumed by heating the lubricating oil to the first temperature at the maximum heating power of the heat exchange device is short, without heating the coolant in the heat exchange device through a heater, thereby saving energy consumed when heating the lubricating oil.

[0044] (6) The present application can determine the target power based on the difference between the first temperature and the temperature of the lubricating oil, and the difference between the first time period and the time period for which the lubricating oil has been heated, when the coolant in the heat exchange device is heated by the heater. Thus, the coolant in the heat exchange device is heated by the heater at the target power. In this way, it can be ensured that the coolant in the heat exchange device is heated at an appropriate power, so that the heat exchange device heats the temperature of the lubricating oil to the first temperature within the first time period. The coolant in the heat exchange device will not be excessively heated, thereby saving the consumed energy.

[0045] (7) The present application can heat the lubricating oil only through the heat exchange device when the temperature of the lubricating oil is lower than the first temperature but the ambient temperature is greater than or equal to the second temperature. In this way, when the ambient temperature is greater than or equal to the second temperature, it means that the ambient temperature is not particularly low, and the temperature of the lubricating oil can be quickly increased by heating the lubricating oil only through the heat exchange device. In addition, by judging whether the heating parameters meet the preset conditions, it is determined whether to stop heating the lubricating oil. The heating of the lubricating oil can be stopped when the temperature of the lubricating oil is greater than or equal to the first temperature, or when the heating time of the lubricating oil is greater than the second time. In this way, when heating the lubricating oil, the temperature of the lubricating oil will not be excessively increased, or the lubricating oil will not be heated for a long time to cause energy waste, thereby saving the consumed energy.

[0046] (8) The present application can determine the first temperature interval according to the first temperature, so as to constantly maintain the temperature of the lubricating oil in the first temperature interval, thereby ensuring that the electric drive efficiency of the electric drive system is at a high efficiency when the vehicle is running.

[0047] (9) The present application can determine whether the vehicle is in the pre-start state through a variety of parameter conditions, thereby accurately determining the operating state of the vehicle. It is ensured that the temperature of the lubricating oil is adjusted only when the vehicle is not in the pre-start state, thereby improving the accuracy of adjusting the temperature of the lubricating oil.

[0048] It should be noted that the technical effects brought about by any implementation method in the second to sixth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0049] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0051] Figure 1 is a structural schematic diagram of a lubricating oil temperature regulation system according to an exemplary embodiment;

[0052] Figure 2 is a structural schematic diagram of another lubricating oil temperature regulation system according to an exemplary embodiment;

[0053] Figure 3 is a flow chart showing a method for regulating lubricating oil temperature according to an exemplary embodiment;

[0054] Figure 4 is a schematic diagram of a viscosity-temperature curve according to an exemplary embodiment;

[0055] Figure 5 is a flow chart of another lubricating oil temperature adjustment method according to an exemplary embodiment;

[0056] Figure 6 is a flow chart of another lubricating oil temperature adjustment method according to an exemplary embodiment;

[0057] Figure 7 is a flow chart of another lubricating oil temperature adjustment method according to an exemplary embodiment;

[0058] Figure 8 is a flow chart of another lubricating oil temperature adjustment method according to an exemplary embodiment;

[0059] Fig. 9 is a block diagram of a lubricating oil temperature regulating device according to an exemplary embodiment;

[0060] Fig.10 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0061] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0063] The lubricating oil temperature regulation method provided in the embodiment of the present application can be applied to the lubricating oil temperature regulation system. Figure 1 FIG. 1 shows a schematic diagram of the structure of a lubricating oil temperature regulation system. Figure 1 As shown, the lubricating oil temperature regulating system 10 includes: a controller 11 and an electric drive system 12. The controller 11 may be a vehicle control unit (VCU), and the electric drive system 12 includes lubricating oil, so that the temperature of the lubricating oil of the electric drive system 12 can be regulated by the controller 11.

[0064] The controller 11 can obtain the operating status of the vehicle.

[0065] The controller 11 can also adjust the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle when the vehicle is in the pre-start state, so that the temperature of the lubricating oil reaches a first temperature, where the first temperature is determined based on characteristic parameters of the lubricating oil.

[0066] In some embodiments, the controller 11 can specifically heat the lubricating oil when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature so that the temperature of the lubricating oil reaches the first temperature, and the second temperature is determined based on the characteristic parameters of the lubricating oil, and the second temperature is lower than the first temperature.

[0067] In some embodiments, the controller 11 can also maintain the temperature of the lubricating oil in a first temperature range when the motor speed of the vehicle is less than a preset speed and the stator temperature of the motor is less than a third temperature, where the third temperature is determined based on characteristic parameters of the motor and the first temperature range is determined based on the first temperature.

[0068] In some embodiments, the controller 11 can specifically heat the lubricating oil based on the maximum heating power of the vehicle's heat exchange device; and determine a first heating time, which is the time consumed to heat the temperature of the lubricating oil to a first temperature based on the maximum heating power; and when the first heating time is greater than the first time, heat the coolant in the heat exchange device through a heater so that the temperature of the lubricating oil reaches the first temperature within a first time, and the first time is determined based on the second temperature.

[0069] In some embodiments, the controller 11 may also heat the lubricating oil to a first temperature when the first heating time is less than or equal to the first time.

[0070] In some embodiments, the controller 11 can specifically heat the coolant in the heat exchange device through a heater with a target power, where the target power is determined based on a target temperature difference and a target time. The target temperature difference is the difference between the first temperature and the temperature of the lubricating oil, and the target time is the difference between the first time and the second heating time. The second heating time is the time for which the lubricating oil has been heated.

[0071] In some embodiments, the controller 11 can also heat the lubricating oil through the vehicle's heat exchange device when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is greater than or equal to the second temperature; and stop heating the lubricating oil when the heating parameters for heating the lubricating oil meet preset conditions, and the heating parameters meet the preset conditions if any one of the following is true: the temperature of the lubricating oil is greater than or equal to the first temperature, and the heating time of the lubricating oil is greater than the second time, the second time is determined based on the pre-start time of the vehicle, and the pre-start time is the time between when the vehicle starts to power on and when the vehicle starts to drive.

[0072] In some embodiments, the upper limit of the first temperature interval is determined based on the sum of the first temperature and a preset temperature difference, and the lower limit of the first temperature interval is determined based on the difference between the first temperature and the preset temperature difference; the controller 11 can specifically heat the lubricating oil when the temperature of the lubricating oil is less than the lower limit of the first temperature interval; and stop heating the lubricating oil when the temperature of the lubricating oil is greater than the upper limit of the first temperature interval.

[0073] In some embodiments, the pre-start state is any one of the following: the vehicle is unlocked, the vehicle is switched from a power-off state to a power-on state and the vehicle speed is 0, the vehicle is locked and the air conditioner is turned on.

[0074] In some embodiments, Figure 2 FIG. 2 shows a schematic diagram of another lubricating oil temperature regulation system. Figure 2As shown, the lubricating oil temperature regulation system may specifically include: a vehicle control system, a thermal management control system, a cooling circuit system, a heat exchange device, and an electric drive system. Among them, a heater (such as a positive temperature coefficient (PTC) component), a waste heat system, and a water pump are included between the thermal management control system and the cooling circuit system. Specifically, the vehicle control system can obtain the ambient temperature from the cloud big data and obtain the vehicle's pre-start signal from the terminal APP. In addition, the vehicle control system can obtain the motor speed, lubricating oil temperature, and motor stator temperature from the electric drive system. Then, the vehicle control system controls the thermal management control system to heat the coolant in the cooling circuit system through the PTC, the waste heat system, and the water pump based on other vehicle waste heat temperature signals (such as batteries, air conditioners, etc.), the required heating power, and the water pump speed, thereby heating the lubricating oil in the electric drive system through the heat of the coolant through the heat exchange device.

[0075] For ease of understanding, the lubricating oil temperature regulation method provided in the present application is specifically introduced below with reference to the accompanying drawings.

[0076] Figure 3 is a flow chart of a lubricating oil temperature regulation method according to an exemplary embodiment. Figure 3 As shown, the method includes the following S301-S302:

[0077] S301. Obtain the operating status of the vehicle.

[0078] Optionally, the vehicle's operating status can be obtained from the vehicle's VCU, or remotely from a cloud server or terminal APP.

[0079] It should be noted that the running state of the vehicle is any of the following: locked state (power-off state), pre-start state, driving state, etc. Among them, the pre-start state and the driving state can be considered as the power-on state. Specifically, the pre-start state can be understood as the vehicle is powered on but not driving. When the vehicle is in the pre-start state, the air conditioner can be turned on, the door can be opened, and the vehicle computer can be controlled (for example, multimedia playback, navigation, etc.).

[0080] In some embodiments, the pre-start state is any one of the following: the vehicle is unlocked, the vehicle is switched from a power-off state to a power-on state and the vehicle speed is 0, the vehicle is locked and the air conditioner is turned on.

[0081] It can be understood that when the vehicle is locked and the air conditioner is turned on, it can be considered that the user turned on the air conditioner in advance through the terminal APP before using the vehicle. This state is the pre-start state signal recognition of the whole vehicle. This is only one of the signal judgment methods. The purpose is to recognize the user's vehicle usage scenario in advance based on this signal. It can also be predicted by other methods. And when the vehicle switches from the power-off state to the power-on state, it can be considered that the electric drive system is powered on with high voltage. Its purpose is to identify whether the whole vehicle is started. It can also be judged by other signals. The purpose is to recognize the user's vehicle usage scenario based on this signal and make a judgment on active heating of the lubricating oil.

[0082] In the embodiment of the present application, the present application can determine whether the vehicle is in the pre-start state through various parameter conditions, thereby accurately determining the running state of the vehicle, and ensuring that the temperature of the lubricating oil is adjusted only when the vehicle is not in the pre-start state, thereby improving the accuracy of adjusting the temperature of the lubricating oil.

[0083] S302: When the running state of the vehicle is a pre-start state, based on the temperature of the lubricating oil of the vehicle and the ambient temperature, adjust the temperature of the lubricating oil so that the temperature of the lubricating oil reaches a first temperature.

[0084] The first temperature is determined based on characteristic parameters of the lubricating oil.

[0085] Optionally, when it is determined that the running state of the vehicle is a pre-start state, the temperature of the lubricating oil and the ambient temperature of the vehicle may be acquired.

[0086] Specifically, the temperature of the vehicle's lubricating oil can be obtained from the vehicle through a temperature sensor, and the ambient temperature can be obtained in real time through cloud big data.

[0087] Optionally, when it is determined that the vehicle's operating state is in a pre-start state, the VCU can wake up the electric drive system, and then provide the lubricating oil temperature signal to the VCU through the electric drive system, so that the VCU can determine whether to adjust the lubricating oil temperature based on the lubricating oil temperature and ambient temperature.

[0088] Optionally, when the temperature of the lubricating oil reaches a first temperature, the electric drive efficiency of the electric drive system can be higher. The first temperature can be determined according to the viscosity-temperature curve of the lubricating oil. Different types of lubricating oils have different corresponding viscosity-temperature curves, and the determined first temperatures are also different. For example, Figure 4 As shown, it is a viscosity-temperature curve corresponding to a type of lubricating oil, and the viscosity of the lubricating oil decreases as the temperature of the lubricating oil increases, wherein the first temperature, the second temperature and the fourth temperature described below corresponding to the type of lubricating oil are shown.

[0089] In an embodiment of the present application, the present application can adjust the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle when the running state of the vehicle is a pre-start state, so that the temperature of the lubricating oil reaches a first temperature determined based on the characteristic parameters of the lubricating oil. In this way, the temperature of the lubricating oil can be adjusted when the vehicle is in a pre-start state. That is, based on this solution, the temperature of the lubricating oil can be pre-adjusted (heated) before the vehicle starts to travel, so that the temperature of the lubricating oil reaches a suitable temperature. Therefore, when the vehicle starts to run, the temperature of the lubricating oil has reached a suitable temperature, thereby improving the electric drive efficiency of the electric drive system when the vehicle is running.

[0090] In some embodiments, Figure 5 As shown, in a lubricating oil temperature adjustment method provided in an embodiment of the present application, the above step S302 may specifically include S501:

[0091] S501. When the running state of the vehicle is a pre-start state, the temperature of the lubricating oil is lower than a first temperature, and the ambient temperature is lower than a second temperature, heat the lubricating oil so that the temperature of the lubricating oil reaches the first temperature.

[0092] The second temperature is determined based on characteristic parameters of the lubricating oil, and the second temperature is lower than the first temperature.

[0093] Optionally, when the vehicle is in the pre-start state, the magnitude relationship between the temperature of the lubricating oil and the first temperature may be determined first, and when the temperature of the lubricating oil is lower than the first temperature, the magnitude relationship between the ambient temperature and the second temperature may be determined. Thus, the lubricating oil is heated only when it is determined that the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature.

[0094] Optionally, when the temperature of the lubricating oil is greater than or equal to the first temperature, it indicates that the temperature of the lubricating oil is not particularly low (i.e., not lower than the first temperature). At this time, there is no need to determine the magnitude relationship between the ambient temperature and the second temperature again. The motor speed and the stator temperature of the motor can be determined directly, thereby thermally managing the temperature of the lubricating oil according to the motor speed and the stator temperature of the motor to maintain the temperature of the lubricating oil at an appropriate temperature (e.g., the first temperature range described below). For the specific process of determining the motor speed and the stator temperature of the motor in this case, please refer to the following description, which will not be repeated here.

[0095] In an embodiment of the present application, the present application can heat the lubricating oil again when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature, so that the temperature of the lubricating oil reaches the first temperature. In this way, when the temperature of the lubricating oil is lower than the first temperature, it means that the temperature of the lubricating oil is lower and will affect the electric drive efficiency, and when the ambient temperature is lower than the second temperature, it means that the ambient temperature is also lower, which will cause the temperature of the lubricating oil to rise more slowly. Therefore, it is necessary to heat the lubricating oil in this case so that the temperature of the lubricating oil reaches the first temperature faster, thereby improving the electric drive efficiency of the electric drive system when the vehicle is running.

[0096] In some embodiments, in a lubricating oil temperature regulation method provided in an embodiment of the present application, the "heating the lubricating oil so that the temperature of the lubricating oil reaches a first temperature" in the above step S501 may specifically include S5011-S5013:

[0097] S5011. Heat the lubricating oil based on the maximum heating power of the heat exchange device of the vehicle.

[0098] Optionally, since the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature, it can be considered that the temperature of the lubricating oil is lower and the ambient temperature is lower. At this time, when the lubricating oil is heated, the temperature of the lubricating oil rises slowly, so the lubricating oil needs to be heated by the maximum heating power of the heat exchange device.

[0099] Specifically, the VCU sends instructions to the thermal management system to control the water pump to operate at maximum power, so that the maximum heating power of the heat exchange device heats the lubricating oil.

[0100] S5012, determining the first heating time.

[0101] The first heating time is the time taken to heat the lubricating oil to the first temperature based on the maximum heating power.

[0102] Optionally, in this case, since the temperature of the lubricating oil is low and the ambient temperature is low, even if the lubricating oil is heated with the maximum heating power of the heat exchange device, it may take a long time (greater than the first time length) to raise the temperature of the lubricating oil to the first temperature.

[0103] However, since half of the time the vehicle is in the pre-start state will not be too long (for example, the first time period), it is necessary to judge based on the current vehicle waste heat power (that is, the maximum heating power of the heat exchange device) whether the time consumed to heat the lubricating oil to the first temperature based on the maximum heating power meets the required time (that is, the first time period).

[0104] S5013: When the first heating time is longer than the first time, heat the coolant in the heat exchange device by the heater so that the temperature of the lubricating oil reaches the first temperature within the first time.

[0105] The first duration is determined based on the second temperature.

[0106] Optionally, when the time consumed to heat the temperature of the lubricating oil to the first temperature based on the maximum heating power is greater than the first time period, it can be considered that the temperature of the lubricating oil rises slowly when the lubricating oil is heated, and the coolant in the heat exchange device needs to be heated by the heater to increase the temperature increase rate of the lubricating oil, so that the temperature of the lubricating oil reaches the first temperature within the first time period.

[0107] Exemplarily, the thermal management system may activate the PTC to heat the coolant, and then increase the temperature of the lubricating oil to the first temperature through the heat exchange device.

[0108] In an embodiment of the present application, the present application can heat the lubricating oil with the maximum heating power of the heat exchange device when heating the lubricating oil, and determine the first heating time consumed to heat the temperature of the lubricating oil to the first temperature under the maximum heating power. If the first heating time is longer than the first time, it means that even if the lubricating oil is heated with the maximum heating power of the heat exchange device, the time consumed is also long, so it is necessary to heat the coolant in the heat exchange device by the heater so that the temperature of the lubricating oil reaches the first temperature within the first time. In this way, the temperature of the lubricating oil can be quickly heated to a suitable temperature in a shorter time, thereby ensuring that the electric drive efficiency of the electric drive system is at a higher efficiency when the vehicle is running.

[0109] In some embodiments, the above-mentioned "heating the coolant in the heat exchange device by a heater" may specifically include: heating the coolant in the heat exchange device by a heater with a target power, the target power is determined based on a target temperature difference and a target duration, the target temperature difference is the difference between the first temperature and the temperature of the lubricating oil, the target duration is the difference between the first duration and the second heating duration, and the second heating duration is the duration for which the lubricating oil has been heated.

[0110] Optionally, when the coolant in the heat exchange device is heated by the heater, the operating power of the heater can be calculated and calibrated according to the difference between the temperature of the lubricating oil and the first temperature, and the difference between the time for which the lubricating oil has been heated and the first time. The specific calculation method can be determined based on the law of conservation of energy and is not specifically limited here.

[0111] In an embodiment of the present application, the present application can determine the target power based on the difference between the first temperature and the temperature of the lubricating oil, and the difference between the first duration and the duration for which the lubricating oil has been heated, when the coolant in the heat exchange device is heated by the heater. Thus, the coolant in the heat exchange device is heated by the heater at the target power. In this way, it can be ensured that the coolant in the heat exchange device is heated at an appropriate power, so that the heat exchange device heats the temperature of the lubricating oil to the first temperature within the first duration. The coolant in the heat exchange device will not be excessively heated, thereby saving the consumed energy.

[0112] In some embodiments, when the first heating time period is less than or equal to the first time period, the temperature of the heated lubricating oil reaches the first temperature.

[0113] Optionally, when the time consumed to heat the temperature of the lubricating oil to the first temperature based on the maximum heating power is less than or equal to the first time, the temperature of the lubricating oil can be quickly heated to the first temperature by the waste heat power of the entire vehicle (i.e., the maximum heating power of the heat exchange device), so there is no need to heat the coolant in the heat exchange device by a heater to increase the speed of heating the lubricating oil.

[0114] Therefore, in this case, the thermal management system can only use the waste heat of the entire vehicle to heat the coolant with the maximum heating power, and heat the temperature of the lubricating oil to the first temperature through the heat exchange device.

[0115] In the embodiment of the present application, when the time consumed to heat the lubricating oil to the first temperature at the maximum heating power of the heat exchange device is short, the lubricating oil can be directly heated without heating the coolant in the heat exchange device through the heater, thereby saving the energy consumed when heating the lubricating oil.

[0116] In some embodiments, Figure 6 As shown, a lubricating oil temperature adjustment method provided in an embodiment of the present application may further include S601-S602:

[0117] S601: When the temperature of the lubricating oil is lower than a first temperature and the ambient temperature is higher than or equal to a second temperature, heat the lubricating oil by a heat exchange device of the vehicle.

[0118] Optionally, when the ambient temperature is greater than or equal to the second temperature, it can be considered that the ambient temperature is not particularly low (i.e., not lower than the second temperature). In this scenario, when the lubricating oil is heated, the temperature of the lubricating oil rises faster. Therefore, the lubricating oil can be heated based on a heat exchange device (e.g., a thermal management system uses the waste heat power of the vehicle). The heating power of the heat exchange device can be controlled according to actual conditions, without heating the lubricating oil at the maximum heating power.

[0119] Exemplarily, the VCU can send instructions to the thermal management system, which exchanges heat with the cooling circuit through the vehicle's waste heat power, heats the lubricating oil through a heat exchange device, and stops heating the lubricating oil after the temperature of the lubricating oil rises to a first temperature or the heating system runs for a second time.

[0120] It should be noted that, for a water-cooled electric drive system, the heat exchange device may be a coolant circuit specially provided on the electric drive system; for an oil-cooled electric drive system, the heat exchange device may be a cooling system of a water cooler and an oil pump.

[0121] S602: When the heating parameters for heating the lubricating oil meet the preset conditions, stop heating the lubricating oil.

[0122] Among them, the heating parameters meet the preset conditions of any one of the following: the temperature of the lubricating oil is greater than or equal to the first temperature, the heating time of the lubricating oil is greater than the second time, the second time is determined based on the pre-start time of the vehicle, and the pre-start time is the time between the vehicle starting to power on and the vehicle starting to drive.

[0123] It can be understood that when the temperature of the lubricating oil is greater than or equal to the first temperature, the heating of the lubricating oil can be stopped, or when the heating time of the lubricating oil (i.e., the heating time when the temperature of the lubricating oil reaches the first temperature for the first time) is greater than the second time, the heating of the lubricating oil can be stopped.

[0124] It should be noted that the second duration is mainly to prevent the temperature of the lubricating oil from being kept warm after the user starts the vehicle (vehicle pre-start state) without running the vehicle. The initial value of the second duration can be determined according to the duration of the vehicle being in the pre-start state each time. For example, the duration of each time the vehicle is in the pre-start state can be recorded, and when the number reaches n times, the average value is taken as the second duration. And the duration of the vehicle in the pre-start state can be continuously recorded, and the second duration can be corrected once every n times.

[0125] The embodiment of the present application can select a heating strategy based on the ambient temperature, and actively heat the lubricating oil in a low temperature environment more accurately. When the ambient temperature is high, the heating power can be reduced to reduce the loss of vehicle power.

[0126] In an embodiment of the present application, the present application can heat the lubricating oil only through the heat exchange device when the temperature of the lubricating oil is lower than the first temperature but the ambient temperature is greater than or equal to the second temperature. In this way, when the ambient temperature is greater than or equal to the second temperature, it means that the ambient temperature is not particularly low, and the temperature of the lubricating oil can be quickly increased by heating the lubricating oil only through the heat exchange device. In addition, by judging whether the heating parameters meet the preset conditions, it is determined whether to stop heating the lubricating oil. The heating of the lubricating oil can be stopped when the temperature of the lubricating oil is greater than or equal to the first temperature, or when the heating time of the lubricating oil is greater than the second time. In this way, when heating the lubricating oil, the temperature of the lubricating oil will not be excessively increased, or the energy will not be wasted by heating the lubricating oil for a long time, thereby saving the consumed energy.

[0127] In some embodiments, Figure 7 As shown, a lubricating oil temperature adjustment method provided in an embodiment of the present application may further include S701:

[0128] S701: When the motor speed of the vehicle is lower than a preset speed and the stator temperature of the motor is lower than a third temperature, maintain the temperature of the lubricating oil in a first temperature range.

[0129] The third temperature is determined based on characteristic parameters of the motor, and the first temperature range is determined based on the first temperature.

[0130] Optionally, after the temperature of the lubricating oil is heated to the first temperature (or the originally acquired temperature of the lubricating oil is greater than or equal to the first temperature) through the above process, the motor speed of the vehicle and the stator temperature of the motor can be further acquired.

[0131] Then, the magnitude relationship between the motor speed and the preset speed is first determined, and when the motor speed is less than the preset speed, the magnitude relationship between the stator temperature and the third temperature is determined. Thus, when the motor speed of the vehicle is less than the preset speed and the stator temperature of the motor is less than the third temperature, the temperature of the lubricating oil is maintained in the first temperature range.

[0132] It should be noted that if the motor speed is less than the preset speed, it can be considered that the vehicle is traveling slowly or the vehicle has just started to travel. Specifically, it can be determined whether the motor speed is 0. When the motor speed is 0, it means that the vehicle is not traveling and is stationary; when the motor speed is greater than 0, it means that the vehicle has started to travel and is in a driving state. The purpose of determining the motor speed is to determine whether the vehicle is already in a driving state. The motor speed is only one of the determination methods. In fact, it can also be determined by the vehicle's driving speed.

[0133] Optionally, when the motor speed is greater than or equal to a preset speed (or the motor speed is not 0), that is, the vehicle starts to move and is in a driving state, it can be considered that there is no need to heat the lubricating oil, and the temperature of the lubricating oil can be gradually increased through the operation of the motor.

[0134] In the embodiment of the present application, the present application can further judge the motor speed of the vehicle and the stator temperature of the motor, so that when the motor speed of the vehicle is less than the preset speed and the stator temperature of the motor is less than the third temperature determined based on the characteristic parameters of the motor, the temperature of the lubricating oil is maintained in the first temperature range. In this way, when the motor speed is low, that is, when the vehicle has not started to drive or has just started to drive and the speed is slow, if the stator temperature of the motor is low, the temperature of the lubricating oil is maintained, thereby ensuring that the temperature of the lubricating oil is in a suitable temperature range, so as to ensure that the electric drive efficiency of the electric drive system is at a high efficiency when the vehicle is running.

[0135] In some embodiments, the upper limit of the first temperature interval is determined based on the sum of the first temperature and a preset temperature difference, and the lower limit of the first temperature interval is determined based on the difference between the first temperature and the preset temperature difference; the above-mentioned "maintaining the temperature of the lubricating oil in the first temperature interval" may specifically include: heating the lubricating oil when the temperature of the lubricating oil is less than the lower limit of the first temperature interval; or stopping heating the lubricating oil when the temperature of the lubricating oil is greater than the upper limit of the first temperature interval.

[0136] In the embodiment of the present application, the present application can determine the first temperature interval according to the first temperature, so as to constantly maintain the temperature of the lubricating oil in the first temperature interval, thereby ensuring that the electric drive efficiency of the electric drive system is at a higher efficiency when the vehicle is running.

[0137] In some embodiments, when the motor speed of the vehicle is less than the preset speed and the stator temperature of the motor is greater than or equal to the third temperature, the thermal management system can maintain the temperature of the lubricating oil in the second temperature interval corresponding to the fourth temperature (i.e., the temperature interval obtained by adding or subtracting the preset temperature difference from the fourth temperature), and when the temperature of the lubricating oil is lower than the lower limit of the second temperature interval, the lubricating oil is heated; when the temperature of the lubricating oil is higher than the upper limit of the second temperature interval, the heating of the lubricating oil is stopped. This is to prevent the stator temperature of the motor from overheating due to heating the lubricating oil. The fourth temperature can be calibrated and determined according to the motor characteristics and the heating rate.

[0138] For example, Figure 8As shown, when it is determined that the running state of the vehicle is the pre-start state, first determine whether the temperature of the lubricating oil is less than the first temperature. When the temperature of the lubricating oil is less than the first temperature, determine whether the ambient temperature is less than the second temperature. Therefore, when the temperature of the lubricating oil is less than the first temperature and the ambient temperature is less than the second temperature, the lubricating oil can be directly heated by the waste heat of the whole vehicle until the temperature of the lubricating oil reaches the first temperature or the heating time exceeds the second duration. When the temperature of the lubricating oil is less than the first temperature and the ambient temperature is greater than or equal to the second temperature, the lubricating oil can be heated based on the maximum heating power of the heat exchange device, and determine whether the first heating time consumed to heat the temperature of the lubricating oil to the first temperature based on the maximum heating power is greater than the first duration. When the first heating time is greater than the first duration, the coolant in the heat exchange device is heated by the heater. When the first heating time is less than or equal to the first duration, the lubricating oil is heated only by the waste heat of the whole vehicle.

[0139] Furthermore, if the temperature of the lubricating oil is greater than or equal to the first temperature, or when the temperature of the lubricating oil is heated to the first temperature, the motor speed can be obtained, and it can be determined whether the motor speed is less than the preset speed. Therefore, when the motor speed is greater than or equal to the preset speed, there is no need to continue heating the lubricating oil; and when the motor speed is less than the preset speed, it can be further determined whether the stator temperature of the motor is less than the third temperature. When the motor speed is less than the preset speed and the stator temperature is less than the third temperature, the temperature of the lubricating oil is maintained in the first temperature range. When the motor speed is less than the preset speed and the stator temperature is greater than or equal to the third temperature, the temperature of the lubricating oil is maintained in the second temperature range. Finally, when the vehicle starts to drive or the temperature of the lubricating oil is maintained for a second period of time, the heating of the lubricating oil ends.

[0140] The present application provides a method that can make a judgment based on the state of the whole vehicle, actively heat up the lubricating oil in advance, reduce the viscosity of the lubricating oil, and improve the electric drive efficiency in the pre-starting stage of the vehicle. At the same time, it can reduce the dependence of the electric drive system on low-temperature and low-viscosity lubricating oil, and reduce the cost of the electric drive system. According to the characteristics of the lubricating oil with high low-temperature viscosity and low efficiency, and low high-temperature viscosity and high efficiency, by combining the thermal management system of the whole vehicle, the lubricating oil can be actively heated during the startup stage of the whole vehicle to reduce the viscosity of the lubricating oil and improve the electric drive efficiency. At the same time, the dependence of the electric drive system on low-viscosity lubricating oil can be reduced, and the cost of the whole vehicle can be reduced.

[0141] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to achieve the above functions, the lubricating oil temperature regulating device or electronic device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0142] The embodiment of the present application can exemplarily divide the functional modules of the lubricating oil temperature regulating device or the electronic device according to the above method. For example, the lubricating oil temperature regulating device or the electronic device can include various functional modules corresponding to the various functional divisions, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0143] Fig. 9 is a block diagram of a lubricating oil temperature regulating device according to an exemplary embodiment. Fig. 9 The lubricating oil temperature regulating device 900 includes: an acquisition module 901 and a processing module 902 .

[0144] The acquisition module 901 is used to acquire the operating state of the vehicle; the processing module 902 is used to adjust the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle when the operating state of the vehicle is a pre-start state, so that the temperature of the lubricating oil reaches a first temperature, and the first temperature is determined based on the characteristic parameters of the lubricating oil.

[0145] In one possible implementation, the processing module 902 is specifically used to heat the lubricating oil when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than the second temperature, so that the temperature of the lubricating oil reaches the first temperature, and the second temperature is determined based on the characteristic parameters of the lubricating oil, and the second temperature is lower than the first temperature.

[0146] In a possible implementation, the processing module 902 is also used to maintain the temperature of the lubricating oil in a first temperature range when the motor speed of the vehicle is less than a preset speed and the stator temperature of the motor is less than a third temperature, wherein the third temperature is determined based on characteristic parameters of the motor and the first temperature range is determined based on the first temperature.

[0147] In one possible embodiment, processing module 902 is specifically used to heat the lubricating oil based on the maximum heating power of the heat exchange device of the vehicle; processing module 902 is specifically used to determine a first heating time, and the first heating time is the time consumed to heat the temperature of the lubricating oil to a first temperature based on the maximum heating power; processing module 902 is specifically used to heat the coolant in the heat exchange device by a heater when the first heating time is greater than the first time, so that the temperature of the lubricating oil reaches the first temperature within a first time, and the first time is determined based on the second temperature.

[0148] In a possible implementation, the processing module 902 is further configured to heat the lubricating oil to a first temperature when the first heating duration is less than or equal to the first duration.

[0149] In one possible embodiment, the processing module 902 is specifically used to heat the coolant in the heat exchange device through a heater with a target power, where the target power is determined based on a target temperature difference and a target duration, where the target temperature difference is the difference between the first temperature and the temperature of the lubricating oil, and the target duration is the difference between the first duration and the second heating duration, and the second heating duration is the duration for which the lubricating oil has been heated.

[0150] In one possible embodiment, the processing module 902 is further used to heat the lubricating oil through the vehicle's heat exchange device when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is greater than or equal to the second temperature; the processing module 902 is further used to stop heating the lubricating oil when a heating parameter for heating the lubricating oil satisfies a preset condition, and the heating parameter satisfies the preset condition as any one of the following: the temperature of the lubricating oil is greater than or equal to the first temperature, and the heating time of the lubricating oil is greater than the second time, the second time is determined based on the pre-start time of the vehicle, and the pre-start time is the time between when the vehicle starts to be powered on and when the vehicle starts to drive.

[0151] In a possible implementation, the upper limit of the first temperature interval is determined based on the sum of the first temperature and a preset temperature difference, and the lower limit of the first temperature interval is determined based on the difference between the first temperature and the preset temperature difference; the processing module 902 is specifically used to heat the lubricating oil when the temperature of the lubricating oil is less than the lower limit of the first temperature interval; the processing module 902 is specifically used to stop heating the lubricating oil when the temperature of the lubricating oil is greater than the upper limit of the first temperature interval.

[0152] In a possible implementation manner, the pre-start state is any one of the following: the vehicle is unlocked, the vehicle is switched from a power-off state to a power-on state and the vehicle speed is 0, the vehicle is locked and the air conditioner is turned on.

[0153] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0154] Fig.10 FIG. 1 is a block diagram of an electronic device according to an exemplary embodiment. Fig.10 As shown, the electronic device 1000 includes but is not limited to: a processor 1001 and a memory 1002 .

[0155] The memory 1002 is used to store executable instructions of the processor 1001. It can be understood that the processor 1001 is configured to execute instructions to implement the lubricating oil temperature adjustment method in the above embodiment.

[0156] It should be noted that those skilled in the art can understand that Fig.10 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and the electronic device may include Fig.10 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0157] The processor 1001 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 1002, and calling data stored in the memory 1002, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 1001 may include one or more processing units. Optionally, the processor 1001 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 1001.

[0158] The memory 1002 may be used to store software programs and various data. The memory 1002 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one functional module (such as a processing module, etc.), etc. In addition, the memory 1002 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0159] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 1002 including instructions. The instructions can be executed by the processor 1001 of the electronic device 1000 to implement the lubricating oil temperature regulation method in the above embodiment.

[0160] In actual implementation, Fig. 9 The functions of the acquisition module 901 and the processing module 902 in Fig.10 The processor 1001 in the embodiment calls the computer program stored in the memory 1002. The specific execution process can refer to the description of the lubricating oil temperature adjustment method in the above embodiment, which will not be repeated here.

[0161] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0162] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, which can be executed by the processor 1001 of the electronic device 1000 to complete the lubricating oil temperature regulation method in the above embodiment.

[0163] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned lubricating oil temperature regulation method embodiment are implemented, and the same technical effect as the above-mentioned lubricating oil temperature regulation method can be achieved. To avoid repetition, they will not be repeated here.

[0164] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0165] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0166] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0167] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0168] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the full classification part or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute the full classification part or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or CD and other media that can store program code.

[0169] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for regulating lubricating oil temperature, characterized in that: The method comprises: Get the running status of the vehicle; When the running state of the vehicle is a pre-start state, the temperature of the lubricating oil is adjusted based on the temperature of the lubricating oil of the vehicle and the ambient temperature so that the temperature of the lubricating oil reaches a first temperature, wherein the first temperature is determined based on characteristic parameters of the lubricating oil.

2. The method according to claim 1, characterized in that The step of adjusting the temperature of the lubricating oil based on the temperature of the lubricating oil of the vehicle and the ambient temperature so that the temperature of the lubricating oil reaches a first temperature comprises: When the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is lower than a second temperature, the lubricating oil is heated so that the temperature of the lubricating oil reaches the first temperature. The second temperature is determined based on characteristic parameters of the lubricating oil and is lower than the first temperature.

3. The method according to claim 1 or 2, characterized in that: The method further comprises: When the motor speed of the vehicle is less than a preset speed and the stator temperature of the motor is less than a third temperature, the temperature of the lubricating oil is maintained in a first temperature range, the third temperature is determined based on characteristic parameters of the motor, and the first temperature range is determined according to the first temperature.

4. The method according to claim 2, characterized in that: The step of heating the lubricating oil so that the temperature of the lubricating oil reaches the first temperature includes: heating the lubricating oil based on a maximum heating power of a heat exchange device of the vehicle; determining a first heating time, where the first heating time is the time taken to heat the lubricating oil to the first temperature based on the maximum heating power; When the first heating time is greater than a first time period, the coolant in the heat exchange device is heated by a heater so that the temperature of the lubricating oil reaches the first temperature within the first time period, and the first time period is determined based on the second temperature.

5. The method according to claim 4, characterized in that The method further comprises: When the first heating time period is less than or equal to the first time period, the temperature of the lubricating oil is heated to the first temperature.

6. The method according to claim 4, characterized in that The step of heating the coolant in the heat exchange device by a heater comprises: The coolant in the heat exchange device is heated by the heater with a target power, wherein the target power is determined based on a target temperature difference and a target duration, wherein the target temperature difference is the difference between the first temperature and the temperature of the lubricating oil, and the target duration is the difference between the first duration and a second heating duration, wherein the second heating duration is the duration for which the lubricating oil has been heated.

7. The method according to claim 2, characterized in that The method further comprises: heating the lubricating oil by a heat exchange device of the vehicle when the temperature of the lubricating oil is lower than the first temperature and the ambient temperature is greater than or equal to the second temperature; When a heating parameter for heating the lubricating oil satisfies a preset condition, the heating of the lubricating oil is stopped, and the heating parameter satisfies the preset condition as any one of the following: the temperature of the lubricating oil is greater than or equal to the first temperature, and the heating time of the lubricating oil is greater than a second time, and the second time is determined based on a pre-start time of the vehicle, and the pre-start time is the time between when the vehicle starts to be powered on and when the vehicle starts to drive.

8. The method according to claim 3, characterized in that The upper limit of the first temperature interval is determined according to the sum of the first temperature and a preset temperature difference, and the lower limit of the first temperature interval is determined according to the difference between the first temperature and the preset temperature difference; The step of maintaining the temperature of the lubricating oil in a first temperature range comprises: When the temperature of the lubricating oil is lower than the lower limit of the first temperature range, heating the lubricating oil; When the temperature of the lubricating oil is greater than an upper limit of the first temperature range, heating of the lubricating oil is stopped.

9. The method according to claim 1 or 2, characterized in that: The pre-start state is any one of the following: the vehicle is unlocked, the vehicle is switched from a power-off state to a power-on state and the vehicle speed is 0, and the vehicle is locked and the air conditioner is turned on.

10. A lubricating oil temperature regulating device, characterized in that: The lubricating oil temperature regulating device comprises: an acquisition module and a processing module; The acquisition module is used to acquire the running status of the vehicle; The processing module is used to adjust the temperature of the lubricating oil based on the temperature of the lubricating oil and the ambient temperature of the vehicle when the running state of the vehicle is a pre-start state, so that the temperature of the lubricating oil reaches a first temperature, and the first temperature is determined based on the characteristic parameters of the lubricating oil.

11. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 1 to 9.

12. A vehicle, characterized in that: The vehicle comprises the lubricating oil temperature regulating device according to claim 10, and the vehicle is used to implement the method according to any one of claims 1-9.

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