Oil-cooled and electrically-driven oil mass identification method, system, device and equipment and vehicle

Abstract

The invention provides an oil-cooled and electrically-driven oil mass recognition method, system, device and equipment and a vehicle, relates to the technical field of vehicles, can achieve oil-cooled and electrically-driven oil mass rapid recognition with high efficiency, accuracy, economy and practicability as the core, and comprises the steps that after the vehicle is started, the vehicle is controlled to operate according to the specified working condition, and the temperature of a motor of the vehicle is obtained; determining the temperature change condition of the motor; and based on the temperature change condition of the motor, the oil quantity of the oil-cooled electric drive is determined.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an oil level identification method, system, device, equipment and vehicle for an oil-cooled electric drive. Background Art

[0002] In the new energy vehicle sector, oil-cooled electric drive systems are highly sought after for their excellent heat dissipation performance. However, accurately identifying the oil level within the system is crucial, as it directly impacts the lubrication, cooling, and operating life of the electric drive system. As new energy vehicles evolve towards higher performance and greater intelligence, traditional oil level identification technologies are no longer able to meet the growing demand for high-performance electric drive systems.

[0003] One related technology uses two temperature sensors to determine whether lubricant is low based on the temperature difference between the motor and the lubricant. Another related technology uses a liquid level sensor to provide an alarm for low lubricant levels. However, these technologies essentially add additional equipment to the existing vehicle structure, increasing vehicle design and manufacturing costs. Furthermore, due to interference from external environmental factors and sensor accuracy limitations, accurate oil level identification is difficult to ensure, making it difficult to meet the requirements of new energy vehicles for efficient and precise operation of oil-cooled electric drive systems. Summary of the Invention

[0004] The present application provides an oil level identification method, system, device, equipment and vehicle for an oil-cooled electric drive, aiming to achieve rapid identification of the oil level of an oil-cooled electric drive with high efficiency, accuracy, economy and practicality as the core.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present application provides a method for identifying the oil level of an oil-cooled electric drive, the method comprising: after the vehicle is started, controlling the vehicle to operate according to specified operating conditions, obtaining the temperature of the vehicle's motor, and determining the temperature change of the motor; based on the temperature change of the motor, determining the oil level of the oil-cooled electric drive.

[0007] Based on the above technical means, the present application can use the existing motor temperature detector to obtain the temperature change of the motor under the specified working conditions of the vehicle, and then determine the oil volume of the oil-cooled electric drive. Since the amount of oil in the oil-cooled electric drive system directly determines the cooling effect of the motor, the temperature change of the motor under the specified working conditions can intuitively and accurately reflect whether the oil volume in the oil-cooled electric drive system is sufficient, thereby improving the recognition efficiency; at the same time, this solution does not require the addition of additional devices, thus controlling the cost of vehicle manufacturing. In summary, the present application can realize the rapid identification of the oil volume of the oil-cooled electric drive with high efficiency, precision, economy and practicality as the core.

[0008] One possible implementation method is to control the vehicle to operate according to a specified operating condition, including: controlling the vehicle's motor to operate according to a specified heating operating condition; controlling the vehicle's oil pump to operate according to a specified speed operating condition.

[0009] Based on the above technical means, the vehicle's motor can be heated by running, and the oil pump can drive the cooling oil to run to cool the motor. This helps to quickly obtain the temperature changes of the motor.

[0010] Another possible implementation method is to determine the oil volume of the oil-cooled electric drive based on the temperature change of the motor, including: when the temperature change of the motor meets the first condition, determining that the oil volume of the oil-cooled electric drive is insufficient; wherein, the first condition includes: the temperature change rate of the motor is greater than or equal to the first change rate threshold, and less than the second change rate threshold, and the duration is greater than or equal to the first preset time.

[0011] It can be understood that since the amount of oil in the oil-cooled electric drive system directly determines the cooling effect of the motor, the temperature change rate and duration of the motor can intuitively and accurately reflect the amount of oil in the oil-cooled electric drive system. For example, if the temperature change rate of the motor is greater than or equal to the first change rate threshold, and less than the second change rate threshold, and the duration is greater than or equal to the first preset time, it indicates that there is a problem of insufficient oil in the oil-cooled electric drive system.

[0012] Another possible implementation method is to determine the oil volume of the oil-cooled electric drive based on the temperature change of the motor, including: when the temperature change of the motor meets the second condition, determining that the oil volume of the oil-cooled electric drive is seriously insufficient; wherein the second condition includes: the temperature change rate of the motor is greater than or equal to the second change rate threshold, and the duration is greater than or equal to the second preset time.

[0013] It can be understood that since the amount of oil in the oil-cooled electric drive system directly determines the cooling effect of the motor, the temperature change rate and duration of the motor can intuitively and accurately reflect the amount of oil in the oil-cooled electric drive system. For example, if the temperature change rate of the motor is greater than or equal to the second change rate threshold, and the duration is greater than or equal to the second preset time, it means that there is a serious shortage of oil in the oil-cooled electric drive system.

[0014] Another possible implementation method is to determine the oil volume of the oil-cooled electric drive based on the temperature change of the motor, including: determining that the oil volume of the oil-cooled electric drive is sufficient when the temperature change of the motor meets the third condition; wherein the third condition includes: the temperature change of the motor does not meet the first condition and does not meet the second condition.

[0015] It can be understood that since the amount of oil in the oil-cooled electric drive system directly determines the cooling effect of the motor, the temperature change rate of the motor can intuitively and accurately reflect the amount of oil in the oil-cooled electric drive system. When the temperature change rate of the motor does not meet the first condition and does not meet the second condition, it means that the amount of oil in the oil-cooled electric drive system is sufficient.

[0016] Another possible implementation manner is controlling the vehicle to operate according to a specified operating condition, including: controlling the vehicle to operate according to the specified operating condition when it is determined that the vehicle meets the activation conditions of the fuel level identification function.

[0017] This application can control the vehicle to operate according to the specified working conditions when it is determined that the vehicle meets the activation conditions of the fuel level identification function, ensuring the stability of the vehicle before the identification function is started, allowing the identification function to proceed smoothly, and improving the safety of the identification process.

[0018] In another possible implementation, the activation condition includes at least one of the following: the vehicle is stationary; and the motor temperature of the vehicle is less than a preset threshold.

[0019] The present application can control the vehicle to operate according to specified operating conditions when it is determined that the vehicle meets the activation conditions of the oil level identification function. For example, when the vehicle is at a standstill, the vehicle can be controlled to operate according to specified operating conditions, which can ensure the stability of the vehicle and improve the safety of the identification process; when the vehicle's motor temperature is lower than a preset threshold, the vehicle can be controlled to operate according to specified operating conditions, which can ensure that the motor is in a normal state and avoid damage to the motor caused by operating the motor when the temperature is too high.

[0020] Another possible implementation method is that, when it is determined that the vehicle meets the activation conditions of the fuel level identification function, before controlling the vehicle to operate according to the specified operating conditions, the method also includes: when receiving the user's activation instruction or recognizing the user's activation intention, determining whether the vehicle meets the activation conditions of the fuel level identification function.

[0021] Based on the above technical means, this application can receive a user's activation command or identify the user's activation intention; and then determine whether the vehicle meets the activation conditions of the fuel level identification function. In this way, the fuel level identification function can be activated in a manner that better meets the user's actual needs, improving the user's operating experience.

[0022] In a second aspect, the present application provides an oil quantity identification system for an oil-cooled electric drive, the system comprising: a motor controller, a motor, an oil pump and a temperature detector; the motor controller is electrically connected to the motor, the oil pump and the temperature detector respectively, and the motor is connected to the oil circuit of the oil pump; the motor controller is used to control the motor to operate according to a specified heating condition and to control the oil pump to operate according to a specified speed condition after the vehicle is started; the temperature detector is used to detect the temperature of the motor during the operation of the motor; the motor controller is also used to obtain the temperature of the motor and determine the temperature change of the motor; based on the temperature change of the motor, the oil quantity of the oil-cooled electric drive is determined.

[0023] In a third aspect, the present application provides an oil level identification device for an oil-cooled electric drive, comprising a control module, an acquisition module, and an identification module. The control module is used to control the vehicle to operate according to a specified operating condition after the vehicle is started; the acquisition module is used to obtain the temperature of the vehicle's motor and determine the temperature change; and the identification module is used to determine the oil level of the oil-cooled electric drive based on the temperature change of the motor.

[0024] In one possible implementation, the control module is specifically used to: control the vehicle's motor to operate according to a specified heating condition; and control the vehicle's oil pump to operate according to a specified speed condition.

[0025] In another possible implementation, the identification module is specifically used to determine that the oil amount of the oil-cooled electric drive is insufficient when the temperature change of the motor meets a first condition; wherein the first condition includes: the temperature change rate of the motor is greater than or equal to a first change rate threshold and less than a second change rate threshold, and the duration is greater than or equal to a first preset time.

[0026] In another possible implementation, the identification module is specifically used to determine that the oil amount of the oil-cooled electric drive is seriously insufficient when the temperature change of the motor meets the second condition; wherein the second condition includes: the temperature change rate of the motor is greater than or equal to the second change rate threshold, and the duration is greater than or equal to the second preset time.

[0027] In another possible implementation, the identification module is specifically used to determine that the oil amount of the oil-cooled electric drive is sufficient when the temperature change of the motor meets the third condition; wherein the third condition includes: the temperature change of the motor does not meet the first condition and does not meet the second condition.

[0028] In another possible implementation, the control module is specifically configured to: upon determining that the vehicle meets activation conditions for the fuel level identification function, control the vehicle to operate according to a specified operating condition.

[0029] In another possible implementation, the activation condition includes at least one of the following: the vehicle is stationary; and the motor temperature of the vehicle is less than a preset threshold.

[0030] In another possible implementation, the acquisition module is further configured to determine whether the vehicle meets activation conditions for the fuel level identification function upon receiving an activation instruction from the user or recognizing the user's activation intention.

[0031] In a fourth aspect, the present application provides an electronic device comprising: a processor and a memory; the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the electronic device implements the method of the first aspect above.

[0032] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium having computer program instructions stored thereon, which implement the method of the first aspect when executed by a processor.

[0033] In a sixth aspect, an embodiment of the present application provides a computer program product, which includes computer program instructions, and when the computer program instructions are executed by a processor, the method of the first aspect above is implemented.

[0034] In a seventh aspect, an embodiment of the present application provides a vehicle, which includes the oil-cooled electric drive oil quantity identification system provided in the second aspect or the electronic device provided in the fourth aspect.

[0035] It should be noted that the technical effects brought about by any implementation method in the second to seventh aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0036] 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

[0037] Figure 1 This is a schematic diagram of the architecture of an oil level identification system for an oil-cooled electric drive provided in this application;

[0038] Figure 2 This is a schematic diagram of the architecture of another oil-level identification system for an oil-cooled electric drive provided in this application;

[0039] Figure 3 A flow chart of an oil level identification method for an oil-cooled electric drive provided in this application;

[0040] Figure 4 A flow chart of another oil level identification method for an oil-cooled electric drive provided in this application;

[0041] Figure 5 A schematic diagram of oil level identification provided for this application;

[0042] Figure 6Another schematic diagram of oil level identification provided for this application;

[0043] Figure 7 A schematic diagram of another fuel level identification situation provided for this application;

[0044] Figure 8 A schematic diagram of the composition of an oil level identification device for an oil-cooled electric drive provided in this application;

[0045] Figure 9 A schematic diagram of the composition of an electronic device provided in this application. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] It should be noted that in the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described in the embodiments of this application as "exemplarily" or "for example" should not be interpreted as being more preferred or advantageous than other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0048] In order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with basically the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order.

[0049] This application provides an architecture for an oil level identification system for an oil-cooled electric drive, such as Figure 1 As shown, the system includes: a motor controller 100, a motor 200, an oil pump 300 and a temperature detector 400; the motor controller 100 is electrically connected to the motor 200, the oil pump 300 and the temperature detector 400 respectively, and the motor 200 is connected to the oil pump 300 in an oil circuit.

[0050] The motor controller 100 is used to control the motor 200 to operate according to a specified heating condition and to control the oil pump 300 to operate according to a specified speed condition after the vehicle is started.

[0051] The temperature detector 400 is used to detect the temperature of the motor 200 during the operation of the motor 200 .

[0052] The motor controller 100 is further used to obtain the temperature of the motor 200 and determine the temperature change of the motor 200; based on the temperature change of the motor 200, determine the oil amount of the oil-cooled electric drive.

[0053] In some embodiments, as Figure 2 As shown, the system further includes: a vehicle controller 500 , which is communicatively connected to the motor controller 100 .

[0054] Exemplarily, the vehicle controller 500 is configured to obtain the vehicle status upon receiving an activation instruction from the user or recognizing the activation intention of the user, and send the vehicle status to the motor controller 100 .

[0055] Exemplarily, the vehicle controller 500 is further configured to respond to an insufficient oil level signal sent by the motor controller 100 and remind the user of insufficient oil level through the vehicle computer system.

[0056] The oil-level identification system for oil-cooled electric drives proposed in this application controls the operation of the motor and oil pump under specified operating conditions. Since motor temperature changes vary under different oil levels, the oil level is determined by monitoring the motor temperature changes, thereby realizing oil level identification and early warning for oil-cooled electric drives in new energy electric vehicles. This system does not require additional devices and hardware to modify the vehicle, fully reusing existing devices in electric vehicles to form an identification and early warning system for insufficient oil levels in oil-cooled electric drives. While controlling costs, it prevents users from driving vehicles with insufficient oil levels, thereby avoiding vehicle damage and ensuring driving safety.

[0057] This application provides an oil level identification method for an oil-cooled electric drive, which can be executed by a motor controller, such as Figure 3 As shown, the process specifically includes the following steps S101 to S102:

[0058] S101 . After the vehicle is started, the vehicle is controlled to operate according to a specified operating condition, and the temperature of the motor of the vehicle is obtained to determine the temperature change of the motor.

[0059] In some embodiments, controlling the vehicle to operate according to a specified operating condition includes: controlling the vehicle's motor to operate according to a specified heating operating condition; and controlling the vehicle's oil pump to operate according to a specified speed operating condition.

[0060] Exemplarily, the designated heating condition is a locked-rotor heating condition.

[0061] For example, the motor controller adjusts the current magnitude and direction so that the current vector sum is zero, thereby achieving the effect of inputting large current and outputting zero torque, that is, all electrical energy is converted into thermal energy, thereby causing the motor to heat up.

[0062] For example, the speed for the designated speed condition can be determined based on the vehicle model and the complexity of the oil-cooled electric drive system. For example, for small new energy vehicles, the speed can be set between 1500-3000 rpm. For medium-to-large new energy vehicles with more complex oil-cooled electric drive systems, the speed can be set between 3000-6000 rpm to ensure that the cooling oil flows quickly and evenly throughout the system, allowing for more accurate oil level detection. This application does not impose any restrictions on this.

[0063] S102: Determine the oil volume of the oil-cooled electric drive based on the temperature change of the motor.

[0064] In some embodiments, step S102 includes: when the temperature change of the motor meets the first condition, determining that the oil amount of the oil-cooled electric drive is insufficient.

[0065] The first condition is that the temperature change rate of the motor is greater than or equal to a first change rate threshold and less than a second change rate threshold, and the duration is greater than or equal to a first preset time.

[0066] It can be understood that since the amount of oil in the oil-cooled electric drive system directly determines the cooling effect of the motor, the temperature change rate and duration of the motor can intuitively and accurately reflect the amount of oil in the oil-cooled electric drive system. For example, if the temperature change rate of the motor is greater than or equal to the first change rate threshold, and less than the second change rate threshold, and the duration is greater than or equal to the first preset time, it indicates that there is a problem of insufficient oil in the oil-cooled electric drive system.

[0067] In some embodiments, step S102 includes: when the temperature change of the motor meets the second condition, determining that the oil amount of the oil-cooled electric drive is seriously insufficient.

[0068] The second condition is that the temperature change rate of the motor is greater than or equal to a second change rate threshold, and the duration is greater than or equal to a second preset time.

[0069] It can be understood that since the amount of oil in the oil-cooled electric drive system directly determines the cooling effect of the motor, the temperature change rate and duration of the motor can intuitively and accurately reflect the amount of oil in the oil-cooled electric drive system. For example, if the temperature change rate of the motor is greater than or equal to the second change rate threshold, and the duration is greater than or equal to the second preset time, it means that there is a serious shortage of oil in the oil-cooled electric drive system.

[0070] In some embodiments, step S102 includes: when the temperature change of the motor satisfies the third condition, determining that the oil amount of the oil-cooled electric drive is sufficient.

[0071] The third condition includes: the temperature change of the motor does not meet the first condition and does not meet the second condition.

[0072] It can be understood that since the amount of oil in the oil-cooled electric drive system directly determines the cooling effect of the motor, the temperature change rate of the motor can intuitively and accurately reflect the amount of oil in the oil-cooled electric drive system. When the temperature change rate of the motor does not meet the first condition and does not meet the second condition, it means that the amount of oil in the oil-cooled electric drive system is sufficient.

[0073] Based on the technical solution provided in the embodiment of the present application, through the specified working conditions of the motor and the oil pump, the motor converts electrical energy into thermal energy, and the oil circulation transfers the thermal energy to the coolant (cooling oil) for use by other equipment in the vehicle or transfers it to the outside of the vehicle. When the oil amount is sufficient, the oil circulation has a good effect on the heat energy transfer, and the temperature rise of the motor changes slowly or does not change; when the oil amount in the motor is insufficient or there is no oil, the oil circulation has a poor effect on the heat energy transfer or has no transfer effect, and the temperature rise of the motor changes rapidly. In summary, the motor controller can judge whether the oil amount of the oil-cooled electric drive system is sufficient, insufficient or seriously insufficient (or no oil) based on the change of the motor temperature.

[0074] In some embodiments, controlling the vehicle to operate according to a specified operating condition includes: controlling the vehicle to operate according to the specified operating condition when determining that the vehicle meets activation conditions of the fuel level identification function.

[0075] It can be understood that the present application can control the vehicle to operate according to the specified operating conditions when it is determined that the vehicle meets the activation conditions of the fuel level identification function, thereby ensuring the stability of the vehicle before the identification function is started, enabling the identification function to proceed smoothly, and improving the safety of the identification process.

[0076] In some embodiments, the activation condition includes at least one of the following: the vehicle is stationary; and the motor temperature of the vehicle is less than a preset threshold.

[0077] The present application can control the vehicle to operate according to specified operating conditions when it is determined that the vehicle meets the activation conditions of the fuel level identification function. For example, when the vehicle is stationary, the vehicle can be controlled to operate according to specified operating conditions, which can ensure the stability of the vehicle and improve the safety of the identification process.

[0078] It is understandable that when the initial temperature of the motor is high, if the motor is still controlled to operate according to the specified heating conditions, the motor temperature will be too high, abnormal temperature rise will occur, and the motor will be damaged. Therefore, when the vehicle's motor temperature is lower than the preset threshold, controlling the vehicle to operate according to the specified conditions can ensure the stability of the oil-cooled electric drive system or equipment and enable the identification function to proceed smoothly.

[0079] In some embodiments, upon determining that the vehicle meets the activation conditions of the fuel level identification function, before controlling the vehicle to operate according to the specified operating conditions, the method further includes:

[0080] When an activation instruction from a user is received or an activation intention from a user is recognized, it is determined whether the vehicle meets an activation condition for the fuel level recognition function.

[0081] The user's activation instruction is an instruction from the user to activate the oil level identification function; and the user's activation intention is the user's intention to activate the oil level identification function.

[0082] Based on the above technical means, this application can receive a user's activation command or identify the user's activation intention; and then determine whether the vehicle meets the activation conditions of the fuel level identification function. In this way, the fuel level identification function can be activated in a manner that better meets the user's actual needs, improving the user's operating experience.

[0083] The following is an introduction to the oil level identification method of the oil-cooled electric drive provided by this application based on a specific embodiment. Take the application of this method to the motor controller as an example. Figure 4 As shown, the following steps S201 to S207 are included:

[0084] S201: After the vehicle is started, the motor controller determines whether it has received an activation instruction from the user.

[0085] If yes, proceed to step S202, otherwise return to the vehicle start node.

[0086] S202: The motor controller determines whether the vehicle meets the activation conditions of the fuel level identification function.

[0087] If yes, proceed to step S203, otherwise return to the vehicle start node.

[0088] S203: Activate the oil level identification function.

[0089] S204 , the motor controller sends a specified speed instruction to the oil pump. The oil pump operates in response to the specified speed instruction. The motor controller determines that the oil pump speed meets the requirement and proceeds to step S205 .

[0090] S205 , the motor controller controls the motor to operate according to the specified locked-rotor heating operating condition. The motor controller determines that the motor operating condition meets the requirements and proceeds to step S206 .

[0091] S206: The motor controller monitors the motor temperature in real time and determines the temperature change of the motor. The details are as follows:

[0092] If the first condition is met: the motor temperature change rate RT1 ≤ RT < RT2, and the temperature change rate remains between the first change rate threshold and the second change rate threshold for a duration ≥ t1, the motor controller determines that the motor oil level is insufficient and sends the judgment result to the vehicle controller, which warns the user of insufficient motor oil. RT1 represents the first change rate threshold, RT2 represents the second change rate threshold, and t1 represents the first preset time.

[0093] For example, the present application provides an oil level identification situation. When the motor controller meets the first condition, the oil level identification situation is as follows: Figure 5 At this point, the user needs to perform the corresponding maintenance operations on the vehicle in the case of insufficient oil.

[0094] If the second condition is met: the motor temperature change rate RT ≥ RT2 and the duration of the temperature change rate being greater than or equal to the second change rate threshold ≥ t2, the motor controller determines that the motor oil level is severely low and sends the determination result to the vehicle controller, which then warns the user of the severe motor oil lowness. t2 represents the second preset time.

[0095] For example, the present application provides an oil level identification situation. When the motor controller meets the second condition, the oil level identification situation is as follows: Figure 6 At this point, the user needs to perform the corresponding maintenance operations on the vehicle in the case of severe oil shortage.

[0096] Determining whether the third condition is satisfied: when the first condition and the second condition are not satisfied, the motor controller determines that the motor oil amount is sufficient.

[0097] For example, the present application provides an oil level identification situation. When the motor controller meets the third condition, the oil level identification situation is as follows: Figure 7 At this point, the user can directly drive the vehicle normally.

[0098] S207: The system shuts down and returns to the vehicle start node.

[0099] The above mainly introduces the solution of the embodiment of the present disclosure from the perspective of method. It can be understood that, in order to realize the above functions, the oil quantity identification device of the oil-cooled electric drive includes at least one of the hardware structure and software modules corresponding to the execution of each function. It should be easy for those skilled in the art to realize that, in combination with the units and algorithm steps of each example described in the embodiment disclosed herein, the embodiment of the present disclosure 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 the embodiment of the present disclosure.

[0100] The embodiment of the present disclosure can divide the oil quantity identification device of the oil-cooled electric drive into functional modules according to the above-mentioned method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above-mentioned integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiment of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0101] For example, Figure 8 This is a composition embodiment of an oil quantity identification device for an oil-cooled electric drive, such as Figure 8 As shown, the device 400 includes a control module 401, an acquisition module 402, and an identification module 403. The control module 401 is used to control the vehicle to operate according to a specified operating condition after the vehicle is started; the acquisition module 402 is used to obtain the temperature of the vehicle's motor and determine the temperature change of the motor; and the identification module 403 is used to determine the oil level of the oil-cooled electric drive based on the temperature change of the motor.

[0102] In a possible implementation, the control module 401 is specifically configured to: control the motor of the vehicle to operate according to a specified heating condition; and control the oil pump of the vehicle to operate according to a specified speed condition.

[0103] In another possible implementation, the identification module 403 is specifically used to determine that the oil amount of the oil-cooled electric drive is insufficient when the temperature change of the motor meets a first condition; wherein the first condition includes: the temperature change rate of the motor is greater than or equal to a first change rate threshold, and less than a second change rate threshold, and the duration is greater than or equal to a first preset time.

[0104] In another possible implementation, the identification module 403 is specifically used to determine that the oil amount of the oil-cooled electric drive is seriously insufficient when the temperature change of the motor meets the second condition; wherein the second condition includes: the temperature change rate of the motor is greater than or equal to the second change rate threshold, and the duration is greater than or equal to the second preset time.

[0105] In another possible implementation, the identification module 403 is specifically used to determine that the oil amount of the oil-cooled electric drive is sufficient when the temperature change of the motor meets the third condition; wherein the third condition includes: the temperature change of the motor does not meet the first condition and does not meet the second condition.

[0106] In another possible implementation, the control module 401 is specifically configured to: when it is determined that the vehicle meets the activation conditions of the fuel level identification function, control the vehicle to operate according to a specified operating condition.

[0107] In another possible implementation, the activation condition includes at least one of the following: the vehicle is stationary; and the motor temperature of the vehicle is less than a preset threshold.

[0108] In another possible implementation, the acquisition module 402 is further configured to determine whether the vehicle meets the activation conditions of the fuel level identification function upon receiving an activation instruction from the user or recognizing the activation intention of the user.

[0109] In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, this application provides a possible structure of the electronic device involved in the above-mentioned embodiment. Figure 9 As shown, the electronic device 500 includes: a processor 502 and a bus 504. Optionally, the electronic device 500 may further include a memory 501; and optionally, the electronic device 500 may further include a communication interface 503.

[0110] Processor 502 may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of this application. Processor 502 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of this disclosure. Processor 502 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0111] The communication interface 503 is used to connect to other devices via a communication network, which may be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0112] The memory 501 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0113] As one possible implementation, memory 501 can exist independently of processor 502. Memory 501 can be connected to processor 502 via bus 504 and used to store instructions or program code. When processor 502 calls and executes the instructions or program code stored in memory 501, the oil level identification method for an oil-cooled electric drive provided in an embodiment of the present application can be implemented. In another possible implementation, memory 501 can also be integrated with processor 502.

[0114] The bus 504 may be an extended industry standard architecture (EISA) bus or the like. The bus 504 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 9 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0115] In an exemplary embodiment, the present application also provides a readable storage medium having program instructions stored thereon; when the program instructions are executed by an electronic device, the electronic device implements the method described in the aforementioned embodiment. The readable storage medium can be a non-transitory readable storage medium, for example, a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0116] In an exemplary embodiment, the embodiment of the present application also provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the above-mentioned related method steps to implement the oil level identification method of the oil-cooled electric drive in the above-mentioned embodiment.

[0117] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for identifying the oil level of an oil-cooled electric drive, characterized in that: The method comprises: After the vehicle is started, controlling the vehicle to operate according to a specified operating condition, obtaining the temperature of the motor of the vehicle, and determining a temperature change of the motor; The oil volume of the oil-cooled electric drive is determined based on the temperature change of the motor.

2. The oil level identification method for oil-cooled electric drive according to claim 1, characterized in that: The controlling the vehicle to operate according to the specified operating conditions includes: controlling the motor of the vehicle to operate according to a specified heating condition; The oil pump of the vehicle is controlled to operate according to a specified speed condition.

3. The oil level identification method for oil-cooled electric drive according to claim 1, characterized in that: The determining the oil amount of the oil-cooled electric drive based on the temperature change of the motor includes: When the temperature change of the motor meets a first condition, it is determined that the oil amount of the oil-cooled electric drive is insufficient; wherein, the first condition includes: the temperature change rate of the motor is greater than or equal to a first change rate threshold and less than a second change rate threshold, and the duration is greater than or equal to a first preset time.

4. The oil level identification method for oil-cooled electric drive according to claim 3, characterized in that: The determining the oil amount of the oil-cooled electric drive based on the temperature change of the motor includes: When the temperature change of the motor meets the second condition, it is determined that the oil amount of the oil-cooled electric drive is seriously insufficient; wherein, the second condition includes: the temperature change rate of the motor is greater than or equal to the second change rate threshold, and the duration is greater than or equal to the second preset time.

5. The oil level identification method for oil-cooled electric drive according to claim 4, characterized in that: The determining the oil amount of the oil-cooled electric drive based on the temperature change of the motor includes: When the temperature change of the motor satisfies a third condition, it is determined that the oil amount of the oil-cooled electric drive is sufficient; wherein, the third condition includes: the temperature change of the motor does not satisfy the first condition and does not satisfy the second condition.

6. The oil level identification method for oil-cooled electric drive according to claim 1, characterized in that: The controlling the vehicle to operate according to the specified operating conditions includes: When it is determined that the vehicle meets the activation condition of the fuel level identification function, the vehicle is controlled to operate according to a specified operating condition.

7. The oil level identification method for an oil-cooled electric drive according to claim 6, characterized in that: The activation condition includes at least one of the following: The vehicle is at rest; The motor temperature of the vehicle is less than a preset threshold.

8. The oil level identification method for an oil-cooled electric drive according to claim 6, characterized in that: When it is determined that the vehicle meets the activation condition of the fuel level identification function, before controlling the vehicle to operate according to the specified operating condition, the method further includes: When an activation instruction from a user is received or an activation intention from a user is recognized, it is determined whether the vehicle meets an activation condition for the fuel level recognition function.

9. An oil level identification system for an oil-cooled electric drive, characterized in that: The system includes: a motor controller, a motor, an oil pump and a temperature detector; the motor controller is communicatively connected with the motor, the oil pump and the temperature detector respectively; The motor controller is used to control the motor to operate according to a specified heating condition and the oil pump to operate according to a specified speed condition after the vehicle is started; The temperature detector is used to detect the temperature of the motor during the operation of the motor; The motor controller is further configured to obtain the temperature of the motor and determine a temperature change of the motor; and determine an amount of oil in the oil-cooled electric drive based on the temperature change of the motor.

10. An oil level identification device for an oil-cooled electric drive, characterized in that: The device includes: a control module, an acquisition module and an identification module; The control module is used to control the vehicle to operate according to the specified working conditions after the vehicle is started; The acquisition module is used to acquire the temperature of the motor of the vehicle and determine the temperature change of the motor; The identification module is used to determine the oil volume of the oil-cooled electric drive based on the temperature change of the motor.

11. An electronic device, characterized in that: The electronic device includes: a processor and a memory; The memory stores instructions executable by the processor; When the processor is configured to execute the instructions, the electronic device implements the method according to any one of claims 1 to 8.

12. A vehicle, characterized in that: The vehicle includes the oil level identification system for the oil-cooled electric drive as provided in claim 9 , or the electronic device as provided in claim 11 .

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