Oil pump state determination method and device and vehicle

Abstract

The invention relates to an oil pump state determination method and device and a vehicle, and relates to the technical field of vehicles. The technical problem that the oil pump state determination result is not accurate enough in the prior art is solved at least. The method comprises the following steps: acquiring current state data of the oil pump, wherein the current state data comprises current temperature, current rotating speed and current; based on the current temperature and the current rotating speed, target state conditions are determined and used for determining the current running state of the oil pump. And determining a target state of the oil pump based on the current and the target state condition, the target state being used for indicating whether the operating state of the oil pump is abnormal.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and in particular to a method and device for determining the state of an oil pump and a vehicle. Background Art

[0002] As a core component of the hydraulic system and fuel supply, the performance of the oil pump directly affects the power transmission efficiency and operation stability of mechanical equipment. Therefore, it is necessary to determine the state of the oil pump to timely detect problems with the oil pump and avoid damage to vehicle components.

[0003] One prior art provides a method for diagnosing the state of an oil pump of a vehicle. This method determines a current threshold based on the ambient temperature of the oil pump and compares the current of the oil pump with the current threshold to obtain the working state of the oil pump. Another prior art provides a method for diagnosing faults of an electric oil pump. This method determines the working state of the oil pump by determining the flow rate of the oil pump.

[0004] However, the results of the oil pump state determined by the above methods are not accurate enough. Therefore, a new method for determining the state of the oil pump is needed. Summary of the Invention

[0005] According to the first aspect provided by this application, this application provides a method and device for determining the state of an oil pump and a vehicle, so as to at least solve the technical problem that the result of determining the state of the oil pump in the related art is not accurate enough.

[0006] The technical solution of this application is applied to a device for determining the state of an oil pump. The method for determining the state of the oil pump includes: obtaining the current state data of the oil pump, where the current state data includes: current temperature, current speed, and current current. Based on the current temperature and the current speed, a target state condition is determined, and the target state condition is used to determine the current operating state of the oil pump. Based on the current current and the target state condition, the target state of the oil pump is determined, and the target state is used to indicate whether the operating state of the oil pump is abnormal.

[0007] In a possible implementation manner, determining the target state condition based on the current temperature and the current speed includes: determining a target current threshold group from multiple preset current threshold groups based on the current temperature and the current speed, where one preset current threshold group corresponds to one preset temperature and one preset speed, and the target current threshold group corresponds to the current temperature and the current speed. Based on the target current threshold group, the target state condition is determined.

[0008] In a possible implementation, the preset current threshold group includes at least one of the following: a high load current threshold and a low load current threshold, and the high load current threshold is greater than the low load current threshold. The target state conditions include at least one of the following: an abnormal load condition and a normal load condition. The normal load condition includes: the current current is less than or equal to the high load current threshold and the current current is greater than or equal to the low load current threshold. The abnormal load condition includes at least one of the following: the current current is greater than the high load current threshold, and the current current is less than the low load current threshold.

[0009] In a possible implementation, the preset current threshold group further includes at least one of the following: an abnormally high load threshold, an oil leakage current threshold, and an abnormally low load threshold. The abnormally high load threshold is greater than the high load current threshold, the low load current threshold is greater than the oil leakage current threshold, and the oil leakage current threshold is greater than the abnormally low load threshold. The abnormal load condition specifically includes: an abnormally high load condition, a high load condition, a low load condition, an oil leakage load condition, and an abnormally low load condition. The abnormally high load condition is: the current current is greater than or equal to the abnormally high load threshold. The high load condition is: the current current is less than the abnormally high load threshold and the current current is greater than the high load current threshold. The low load condition is: the current current is less than the low load current threshold and the current current is greater than the oil leakage current threshold. The oil leakage load condition is: the current current is less than or equal to the oil leakage current threshold and the current current is greater than or equal to the abnormally low load threshold. The abnormally low load condition is: the current current is less than the abnormally low load threshold.

[0010] In a possible implementation, determining the target state of the oil pump based on the current current and the target state conditions includes: if the current current meets the normal load condition, determining that the target state of the oil pump is the normal state of the oil pump. If the current current meets the abnormally high load condition, determining that the target state of the oil pump is the blocked state of the oil pump. If the current current meets the high load condition, determining that the target state of the oil pump is a suspected blocked state of the oil pump. If the current current meets the low load condition, determining that the target state of the oil pump is a suspected oil leakage state of the oil pump. If the current current meets the oil leakage load condition, determining that the target state of the oil pump is the oil leakage state of the oil pump. If the current current meets the abnormally low load condition, determining that the target state of the oil pump is the damaged state of the oil pump.

[0011] In a possible implementation, the method for determining the state of the oil pump further includes: when the target state is an abnormal state and the duration of the target state is the first duration, sending a power control instruction to the motor, and the power control instruction is used to indicate controlling the output power of the motor. The abnormal state includes at least one of the following: the blocked state of the oil pump, the suspected blocked state of the oil pump, the suspected oil leakage state of the oil pump, the oil leakage state of the oil pump, and the damaged state of the oil pump.

[0012] In a possible implementation, the power control instruction includes a power control coefficient, which is used to adjust the output power of the motor. One abnormal state corresponds to one power control coefficient. The power control coefficient corresponding to the suspected oil pump blockage state is greater than the power control coefficient corresponding to the suspected oil pump leakage state, and the corresponding power control coefficient is greater than the power control coefficient corresponding to the oil pump leakage state.

[0013] In a possible implementation, after sending the power control instruction to the motor, the method for determining the oil pump state further includes: updating the target state of the oil pump. When the updated target state is an abnormal state and the duration of the updated target state is the second duration, a stop instruction is sent to the motor, and the stop instruction is used to instruct to control the motor to stop outputting power.

[0014] In a possible implementation, based on the current temperature and the current speed, determining a target current threshold group from multiple preset current threshold groups includes: inputting the current temperature and the current speed into a state determination model to obtain the target current threshold group. The state determination model is used to determine the preset current threshold group corresponding to the oil pump when the temperature of the oil pump is the preset temperature and the speed of the oil pump is the preset speed.

[0015] According to the second aspect provided by the present application, a device for determining the oil pump state is provided. The device includes an acquisition module and a processing module.

[0016] The acquisition module is used to acquire the current state data of the oil pump. The current state data includes: current temperature, current speed, and current current. The processing module is used to determine the target state condition based on the current temperature and the current speed. The target state condition is used to determine the current operating state of the oil pump. The processing module is further used to determine the target state of the oil pump based on the current current and the target state condition. The target state is used to indicate whether the operating state of the oil pump is abnormal.

[0017] In a possible implementation, the processing module is used to determine a target current threshold group from multiple preset current threshold groups based on the current temperature and the current speed. One preset current threshold group corresponds to one preset temperature and one preset speed, and the target current threshold group corresponds to the current temperature and the current speed. The processing module is further used to determine the target state condition based on the target current threshold group.

[0018] In a possible implementation, the preset current threshold group includes at least one of the following: a high-load current threshold and a low-load current threshold, and the high-load current threshold is greater than the low-load current threshold. The target state conditions include at least one of the following: an abnormal load condition and a normal load condition. The normal load condition includes: the current current is less than or equal to the high-load current threshold and the current current is greater than or equal to the low-load current threshold. The abnormal load condition includes at least one of the following: the current current is greater than the high-load current threshold, and the current current is less than the low-load current threshold.

[0019] In a possible implementation, the preset current threshold group further includes at least one of the following: an abnormally high load threshold, an oil leakage current threshold, and an abnormally low load threshold. The abnormally high load threshold is greater than the high-load current threshold, the low-load current threshold is greater than the oil leakage current threshold, and the oil leakage current threshold is greater than the abnormally low load threshold. The abnormal load condition specifically includes: an abnormally high load condition, a high load condition, a low load condition, an oil leakage load condition, and an abnormally low load condition. The abnormally high load condition is: the current current is greater than or equal to the abnormally high load threshold. The high load condition is: the current current is less than the abnormally high load threshold and the current current is greater than the high-load current threshold. The low load condition is: the current current is less than the low-load current threshold and the current current is greater than the oil leakage current threshold. The oil leakage load condition is: the current current is less than or equal to the oil leakage current threshold and the current current is greater than or equal to the abnormally low load threshold. The abnormally low load condition is: the current current is less than the abnormally low load threshold.

[0020] In a possible implementation, the processing module is configured to, if the current current meets the normal load condition, determine that the target state of the oil pump is the normal state of the oil pump. The processing module is further configured to, if the current current meets the abnormally high load condition, determine that the target state of the oil pump is the blocked state of the oil pump. The processing module is further configured to, if the current current meets the high load condition, determine that the target state of the oil pump is a suspected blocked state of the oil pump. The processing module is further configured to, if the current current meets the low load condition, determine that the target state of the oil pump is a suspected oil leakage state of the oil pump. The processing module is further configured to, if the current current meets the oil leakage load condition, determine that the target state of the oil pump is the oil leakage state of the oil pump. The processing module is further configured to, if the current current meets the abnormally low load condition, determine that the target state of the oil pump is the damaged state of the oil pump.

[0021] In a possible implementation, the processing module is configured to, when the target state is an abnormal state and the duration of the target state is the first duration, send a power control instruction to the motor. The power control instruction is used to instruct to control the output power of the motor. The abnormal state includes at least one of the following: the blocked state of the oil pump, a suspected blocked state of the oil pump, a suspected oil leakage state of the oil pump, the oil leakage state of the oil pump, and the damaged state of the oil pump.

[0022] In a possible implementation, the power control instruction includes a power control coefficient, which is used to adjust the output power of the motor. One abnormal state corresponds to one power control coefficient. The power control coefficient corresponding to the suspected oil pump blockage state is greater than the power control coefficient corresponding to the suspected oil pump leakage state, and the corresponding power control coefficient is greater than the power control coefficient corresponding to the oil pump leakage state.

[0023] In a possible implementation, the processing module is used to update the target state of the oil pump. The processing module is further configured to send a stop instruction to the motor when the updated target state is an abnormal state and the duration of the updated target state is the second duration. The stop instruction is used to instruct to control the motor to stop outputting power.

[0024] In a possible implementation, the processing module is configured to input the current temperature and the current speed into the state determination model to obtain a target current threshold group. The state determination model is used to determine the preset current threshold group corresponding to the oil pump when the temperature of the oil pump is the preset temperature and the speed of the oil pump is the preset speed.

[0025] According to the third aspect provided by the present application, there is provided a device for determining the state of an oil pump, including: a processor; a memory for storing instructions executable by the processor; wherein, the processor is configured to execute the instructions to implement the method according to the first aspect and any of its possible implementations.

[0026] According to the fourth aspect provided by the present application, there is provided a vehicle, the vehicle includes the device for determining the state of the oil pump according to the second aspect, and the vehicle is used to implement the method according to the first aspect and any of its possible implementations as described above.

[0027] According to the fifth aspect provided by the present application, there is provided a computer-readable storage medium. When the instructions in the computer-readable storage medium are executed by the processor of the device for determining the state of the oil pump, the device for determining the state of the oil pump can execute the method according to the first aspect and any of its possible implementations.

[0028] According to the sixth aspect provided by the present application, there is provided a computer program product. The computer program product includes computer instructions. When the computer instructions run on the device for determining the state of the oil pump, the device for determining the state of the oil pump is like the method according to the first aspect and any of its possible implementations.

[0029] Advantages of the present invention:

[0030] (1) The current status data of the oil pump can be obtained, and the current status data includes: current temperature, current speed, and current current. After that, the target status condition can be determined based on the current temperature and current speed. Then, the target status of the oil pump can be determined based on the current current and the target status condition. In this way, the operation of the oil pump can be jointly determined by the current temperature and current speed, making the oil pump status result more accurate. Further, by obtaining the target status of the oil pump in a timely manner, it is possible to prevent the user from using the vehicle for a long time when the oil pump is in an abnormal state, thereby improving the safety of vehicle driving.

[0031] (2) The target current threshold group can be determined from multiple preset current threshold groups based on the current temperature and current speed. Then, the target status condition can be determined based on the target current threshold group. In this way, data changes can be quickly captured and responded to, improving the immediate response ability of the system, and thus the current operating state of the oil pump can be accurately reflected.

[0032] (3) By clearly defining the preset conditions corresponding to the normal state and the preset conditions corresponding to the abnormal state, potential problems can be more effectively detected and responded to, thereby reducing the occurrence of faults and errors.

[0033] (4) By judging the status of the oil pump through multiple conditions, the data of the oil pump can be more precisely filtered and analyzed, and thus the status of the oil pump can be more accurately determined.

[0034] (5) By determining the specific target status of the oil pump, corresponding adjustments to the vehicle can be made more accurately based on the target status of the oil pump.

[0035] (6) When the target status is an abnormal state, by controlling the output power of the motor, the temperature of the oil pump (i.e., the temperature of the oil pumped by the oil pump) can be adjusted, and then the current of the oil pump can be adjusted so that the current of the oil pump is between the high-load current threshold and the low-load current threshold, so that the oil pump can operate normally. Further, on the premise of the same electric drive power output, the temperature of the oil pumped by the oil pump within a certain period of time in the suspected oil pump blocked state is lower than the temperature in the suspected oil pump leaking state, and the temperature in the suspected oil pump leaking state is lower than the temperature in the oil pump leaking state. Therefore, by setting different power control coefficients for different abnormal states, the status of the oil pump can be adjusted more precisely, enhancing the stability of the system.

[0036] (7) If the updated target status is still an abnormal state, it means that the status of the oil pump cannot be adjusted. At this time, a stop command is sent to the motor, which can prevent further damage to the vehicle and prevent accidents, ensuring the safety of the user.

[0037] (8) By inputting the current temperature and the current rotational speed into the state determination model, an accurate matching between the current temperature and the current rotational speed and the target current threshold group can be achieved, thereby enhancing the system safety and reliability.

[0038] It should be noted that for the technical effects brought by any implementation manner in the second to sixth aspects, reference can be made to the technical effects brought by the corresponding implementation manner in the first aspect, which will not be elaborated here.

[0039] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. Brief Description of the Drawings

[0040] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with this application, and are used together with the specification to explain the principles of this application, and do not constitute an improper limitation to this application.

[0041] Figure 1 It is a schematic structural diagram of a vehicle shown according to an exemplary embodiment;

[0042] Figure 2 It is a schematic flowchart of a method for determining the state of an oil pump shown according to an exemplary embodiment;

[0043] Figure 3 It is a schematic flowchart of another method for determining the state of an oil pump shown according to an exemplary embodiment;

[0044] Figure 4 It is an exemplary schematic diagram of a state determination model shown according to an exemplary embodiment;

[0045] Figure 5 It is an exemplary schematic diagram of a preset operating condition line shown according to an exemplary embodiment;

[0046] Figure 6 It is a schematic structural diagram of a device for determining the state of an oil pump shown according to an exemplary embodiment;

[0047] Figure 7 It is a schematic structural diagram of another device for determining the state of an oil pump shown according to an exemplary embodiment. Detailed Embodiments

[0048] In order to enable those of ordinary skill in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings.

[0049] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with this application. On the contrary, they are only examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0050] With the continuous high-speed growth of the new energy vehicle market, the power system of new energy vehicles has also begun to evolve towards high performance. As the core subsystem of the power system thermal management, the oil cooling system can cool and lubricate the motor. And as the core power component of the oil cooling system, the oil pump's working reliability directly affects the operation safety of the entire electric drive system. At present, the industry's research on the oil pump system mainly focuses on the optimization of operation control strategies, and there are still deficiencies in the mechanical failure diagnosis of the oil pump and the oil cooling system.

[0051] Some methods can provide diagnostic protection for oil leakage or non-oiling scenarios, but do not consider the influence of factors such as temperature, flow channel air resistance, and lubricating oil viscosity on the vehicle. Therefore, even when the vehicle runs out of oil or is not oiled, the system cannot accurately perform fault diagnosis in a timely manner, which may cause problems such as overheating of the electric drive system, abnormal wear of gears, and even power interruption, affecting the driving safety of new energy vehicles.

[0052] Some methods only diagnose idling and blocked rotation scenarios, the scenarios are relatively single, and no disposal solutions are set for faults, so the practicability is poor.

[0053] To solve the above problems, this application provides a method for determining the state of an oil pump. The method includes: obtaining the current state data of the oil pump, where the current state data includes: current temperature, current speed, and current current. Then, based on the current temperature and current speed, the target state condition can be determined. Then, based on the current current and the target state condition, the target state of the oil pump can be determined. In this way, the operation of the oil pump can be jointly determined by the current temperature and current speed, making the oil pump state result more accurate. Further, by obtaining the target state of the oil pump in a timely manner, it is possible to prevent the user from using the vehicle for a long time when the oil pump state is abnormal, thereby improving the driving safety of the vehicle.

[0054] It should be noted that the execution subject of the method for determining the state of the oil pump provided in this application can be a device for determining the state of the oil pump, and this device can also be a vehicle. At the same time, this device can also be the Central Processing Unit (CPU) of the vehicle, or a determining module for determining the state of the oil pump in this device, or a vehicle-mounted device in the vehicle. In the embodiments of this application, the method for determining the state of the oil pump executed by the vehicle is taken as an example to illustrate the method for determining the state of the oil pump provided in the embodiments of this application.

[0055] The implementation environment of the embodiments of this application will be introduced below.

[0056] Exemplarily, as Figure 1 shown, it is a schematic structural diagram of a vehicle provided in the embodiments of this application. Among them, the vehicle includes an instrument unit and an electric drive device. Among them, the electric drive device includes an acquisition unit, a diagnosis unit, and an execution unit.

[0057] In the embodiments of this application, the instrument unit can reflect the running condition of the vehicle to the operator through a visualization interface. And, the instrument unit can send a control instruction to the electric drive device.

[0058] The acquisition unit can acquire the current state data of the oil pump. The current state data includes: current temperature, current speed, and current current, and send the current temperature, current speed, and current current to the diagnosis unit.

[0059] The diagnosis unit can receive the current temperature, current speed, and current current, and input the current temperature and current speed into the state determination model to determine the target state of the oil pump. The diagnosis unit can also send the target state of the oil pump to the execution unit.

[0060] Optionally, the diagnosis unit can perform current interpolation based on the current temperature and current speed to obtain a target current threshold group. Then, the diagnosis unit can judge the state of the oil pump based on the current current and the target current threshold group to determine the target state of the oil pump.

[0061] The execution unit can send a power control instruction to the motor to control the output power of the motor. And, the execution unit can send a warning instruction to the instrument unit. The warning instruction is used to indicate that the target state of the oil pump is an abnormal load state.

[0062] Optionally, when the target state of the oil pump is an abnormal load state, the execution unit can send a power control instruction to the motor based on the target state of the oil pump.

[0063] In this way, the driver can be prompted to take safety actions in advance.

[0064] In a possible design, if the diagnostic unit initially determines that the target state of the oil pump is an abnormal load state, the execution unit will immediately limit the electric drive output capacity. After that, when the diagnostic unit determines again that the target state of the oil pump is an abnormal load state, the execution unit can send a stop command to the motor to control the motor to stop outputting power.

[0065] It should be noted that if the abnormal load state of the oil pump is a blocked state of the oil pump, it means that the oil pump motor is blocked and cannot provide cooling conditions.

[0066] Optionally, the instrument unit can send a blocked pump prompt message. For example, the blocked pump prompt message is "The oil pump motor is blocked. Please check the oil pump and the circuit."

[0067] It should be noted that if the abnormal load state of the oil pump is a suspected blocked state of the oil pump, it means that the load condition of the oil pump is on the high side at this time, there may be partial blockage in the oil circuit, and the electric drive cooling condition is insufficient.

[0068] Optionally, the instrument unit can send a suspected blocked pump prompt message. For example, the suspected blocked pump prompt message is "Suspected oil circuit blockage. Please check the oil pump and the circuit."

[0069] It should be noted that if the abnormal load state of the oil pump is a suspected oil leakage state of the oil pump, it means that at this time, the oil circuit may be depressurized, or less oil is added, or the oil pump is leaking, and the electric drive cooling condition is insufficient.

[0070] Optionally, the instrument unit can send a suspected oil leakage prompt message. For example, the suspected oil leakage prompt message is "Suspected oil circuit depressurization or oil leakage. Please check the oil pump and the circuit."

[0071] It should be noted that if the abnormal load state of the oil pump is an oil leakage state of the oil pump, it means that the load condition of the oil pump is abnormally low at this time, and the electric drive cooling condition is insufficient.

[0072] Optionally, the instrument unit can send an oil leakage prompt message. For example, the oil leakage prompt message is "Suspected oil leakage or no oil added. Please check the oil pump and the circuit."

[0073] It should be noted that if the abnormal load state of the oil pump is a damaged state of the oil pump, it means that the function of the oil pump is limited or not working at this time, and the oil pump will not be able to provide cooling capacity.

[0074] Optionally, the instrument unit can send a damage prompt message. For example, the blocked pump prompt message is "The function of the oil pump is limited. Please check the oil pump and the circuit."

[0075] For ease of understanding, the method for determining the state of the oil pump provided in the present application will be specifically introduced below with reference to the accompanying drawings.

[0076] Figure 2It is a schematic flowchart of a method for determining the state of an oil pump shown according to an exemplary embodiment. As Figure 2 shown, the method for determining the state of the oil pump includes:

[0077] S201. Obtain the current state data of the oil pump.

[0078] Among them, the current state data includes: current temperature, current speed, and current current.

[0079] In a possible implementation manner, after the vehicle is unlocked and powered on, a low-voltage power supply network will be established to provide working power for the vehicle. After that, the oil pump can be controlled to operate at a preset speed. After that, the current temperature, current speed, and current current of the oil pump can be obtained based on sensors.

[0080] S202. Determine the target state condition based on the current temperature and current speed.

[0081] Among them, the target state condition is used to determine the current operating state of the oil pump.

[0082] In the embodiments of the present application, the target state condition includes at least one of the following: abnormal load condition, normal load condition. The normal load condition includes: the current current is less than or equal to the high load current threshold and the current current is greater than or equal to the low load current threshold. The abnormal load condition includes at least one of the following: the current current is greater than the high load current threshold, the current current is less than the low load current threshold.

[0083] It can be understood that by clearly defining the preset conditions corresponding to the normal state and the preset conditions corresponding to the abnormal state, potential problems can be detected and responded to more effectively, thereby reducing the occurrence of faults and errors.

[0084] Specifically, the abnormal high load condition is: the current current is greater than or equal to the abnormal high load threshold. The high load condition is: the current current is less than the abnormal high load threshold and the current current is greater than the high load current threshold. The low load condition is: the current current is less than the low load current threshold and the current current is greater than the oil leakage current threshold. The oil leakage load condition is: the current current is less than or equal to the oil leakage current threshold and the current current is greater than or equal to the abnormal low load threshold. The abnormal low load condition is: the current current is less than the abnormal low load threshold.

[0085] It can be understood that by judging the state of the oil pump through multiple conditions, the data of the oil pump can be filtered and analyzed more precisely, so that the state of the oil pump can be determined more accurately.

[0086] In a possible implementation, multiple preset state conditions are pre-stored in the device for determining the state of the oil pump. One preset temperature and one preset rotational speed correspond to one preset state condition. Subsequently, based on the current temperature and the current rotational speed, the target state condition can be determined from the multiple preset state conditions.

[0087] S203. Determine the target state of the oil pump based on the current current and the target state condition.

[0088] Among them, the target state is used to indicate whether the operating state of the oil pump is abnormal.

[0089] In a possible implementation, if the current current meets the normal load condition, determine that the target state of the oil pump is the normal state of the oil pump. If the current current meets the abnormal load condition, determine that the target state of the oil pump is the abnormal state of the oil pump.

[0090] Optionally, if the current current meets the extremely high load condition, determine that the target state of the oil pump is the blocked state of the oil pump. If the current current meets the high load condition, determine that the target state of the oil pump is the suspected blocked state of the oil pump. If the current current meets the low load condition, determine that the target state of the oil pump is the suspected oil leakage state of the oil pump. If the current current meets the oil leakage load condition, determine that the target state of the oil pump is the oil leakage state of the oil pump. If the current current meets the extremely low load condition, determine that the target state of the oil pump is the damaged state of the oil pump.

[0091] In this way, by determining the specific target state of the oil pump, the vehicle can be adjusted accordingly more accurately based on the target state of the oil pump.

[0092] Based on the above technical solution, the current state data of the oil pump can be obtained. The current state data includes: the current temperature, the current rotational speed, and the current current. Subsequently, based on the current temperature and the current rotational speed, the target state condition can be determined. Subsequently, based on the current current and the target state condition, the target state of the oil pump can be determined. In this way, the operating condition of the oil pump can be jointly determined by the current temperature and the current rotational speed, making the result of the oil pump state more accurate. Further, by obtaining the target state of the oil pump in a timely manner, it is possible to prevent the user from using the vehicle for a long time when the state of the oil pump is abnormal, thereby improving the safety of vehicle driving.

[0093] Figure 3 It is a flowchart showing another method for determining the state of an oil pump according to an exemplary embodiment, as Figure 3 shown, S203 includes:

[0094] S301. Determine the target current threshold group from multiple preset current threshold groups based on the current temperature and the current rotational speed.

[0095] Among them, a preset current threshold group corresponds to a preset temperature and a preset rotational speed, and the target current threshold group corresponds to the current temperature and the current rotational speed.

[0096] In the embodiments of the present application, the preset current threshold group includes at least one of the following: a high-load current threshold and a low-load current threshold, and the high-load current threshold is greater than the low-load current threshold.

[0097] Optionally, the preset current threshold group further includes: an abnormally high-load threshold, an oil leakage current threshold, and an abnormally low-load threshold. The abnormally high-load threshold is greater than the high-load current threshold, the low-load current threshold is greater than the oil leakage current threshold, and the oil leakage current threshold is greater than the abnormally low-load threshold.

[0098] Specifically, the abnormal load conditions include: an abnormally high-load condition, a high-load condition, a low-load condition, an oil leakage load condition, and an abnormally low-load condition.

[0099] In a possible implementation manner, the current temperature and the current rotational speed can be input into a state determination model to obtain the target current threshold group. The state determination model is used to determine the preset current threshold group corresponding to the oil pump when the temperature of the oil pump is the preset temperature and the rotational speed of the oil pump is the preset rotational speed.

[0100] It should be noted that the present application does not limit the temperature of the oil pump. For example, the temperature of the oil pump can be the temperature of the oil pump itself or the temperature of the oil pumped by the oil pump.

[0101] It can be understood that by inputting the current temperature and the current rotational speed into the state determination model, the accurate matching of the current temperature and the current rotational speed with the target current threshold group can be achieved, thereby enhancing the system safety and reliability.

[0102] Optionally, multiple preset temperatures and multiple preset rotational speeds can be obtained, and the preset current threshold group of the oil pump at each preset temperature and preset rotational speed can be obtained. Then, based on the multiple preset temperatures, the multiple preset rotational speeds, and the preset current threshold group at each preset temperature and preset rotational speed, the state determination model can be obtained.

[0103] It should be understood that the preset temperature is within the temperature range in which the oil pump can work normally.

[0104] It should be noted that starting from the starting rotational speed of the oil pump, gears can be set based on different temperature segments. By calibrating the working condition line of the oil pump in an actual oil pump, the preset current threshold group can be obtained, and the working condition line of the oil pump at the preset temperature and preset rotational speed can be drawn.

[0105] It should be noted that this application places no restrictions on the state determination model. For example, the state determination model can be a neural network model; for another example, the state determination model can be a mathematical model; for yet another example, the state determination model can be a calibration model.

[0106] Exemplarily, as Figure 4 shown, a three-dimensional data matrix can be obtained based on multiple preset temperatures, multiple preset rotation speeds, and multiple preset current threshold groups, and then a three-dimensional surface, that is, the state determination model, can be obtained. Among them, the multiple preset temperatures include: -40 degrees Celsius, -30 degrees Celsius, -20 degrees Celsius, -10 degrees Celsius, 0 degrees Celsius, 10 degrees Celsius, 20 degrees Celsius, 30 degrees Celsius, 40 degrees Celsius. The multiple preset rotation speeds include: 500 revolutions per minute (rpm), 1000 rpm, 2000 rpm, 3000 rpm, 4000 rpm, 5000 rpm. The preset current thresholds in the multiple preset current threshold groups are in the range of 0 amperes (A) to 6 A.

[0107] Optionally, preset oil pump state data can be obtained. The preset oil pump state data includes at least one of the following: oil pump blocked rotation data, oil pump load data, oil pump oil leakage data, oil pump idling data. The oil pump blocked rotation data is the data of the oil pump in the blocked rotation state, the oil pump load data is the data of the oil pump in the normal state, the oil pump oil leakage data is the data of the oil pump in the oil leakage state, and the oil pump idling data is the data of the oil pump in the idling state.

[0108] Specifically, the oil pump blocked rotation data includes a preset temperature, a preset rotation speed, and an abnormally high load threshold. The oil pump load data includes a preset temperature, a preset rotation speed, and a preset load current threshold. The oil pump oil leakage data includes a preset temperature, a preset rotation speed, and an oil leakage current threshold. The oil pump idling data includes a preset temperature, a preset rotation speed, and an abnormally low load threshold. Among them, the preset load current threshold includes: a high load current threshold and a low load current threshold. The high load current threshold is the highest preset load current threshold among the multiple preset load current thresholds at each preset rotation speed, and the low load current threshold is the lowest preset load current threshold among the multiple preset load current thresholds at each preset rotation speed.

[0109] In this way, the accuracy and effectiveness of oil pump target state determination can be improved.

[0110] Optionally, a preset temperature and a preset rotation speed can be set. Then, experiments are conducted on the oil pump at the preset temperature and the preset rotation speed to obtain the preset oil pump state data of the oil pump.

[0111] Specifically, the oil pump oil circuit can be blocked, and the oil pump after blocking the oil circuit can be experimented at a preset temperature and a preset speed to obtain the abnormal high load threshold of the oil pump in the blocked state. The oil pump can be experimented at a preset temperature and a preset speed to obtain the preset load current threshold of the oil pump in the normal state. The oil in the motor can be drained after filling, and the oil pump after draining can be experimented at a preset temperature and a preset speed to obtain the oil leakage current threshold of the oil pump in the oil leakage state. The oil pump can be experimented without adding oil at a preset temperature and a preset speed to obtain the abnormal low load threshold of the oil pump in the idling state.

[0112] It should be noted that the rotation speed gear of the oil pump can be set in different temperature sections based on a conventional strategy to obtain a preset rotation speed. For example, the rotation speed gears of the oil pump can be N1, N2, N3... Nn.

[0113] It should be noted that the starting operating speed of the oil pump can be calibrated based on the basic cooling requirements of the electric drive device. When the vehicle has not been started for a long time, the ambient temperature is the same as the temperature of the oil pump in the electric drive device.

[0114] S302. Determine the target state condition based on the target current threshold group.

[0115] In a possible implementation, the target state condition can be generated based on the target current threshold group.

[0116] Based on the above technical solution, the target current threshold group can be determined from multiple preset current threshold groups based on the current temperature and the current speed. Then, the target state condition can be determined based on the target current threshold group. In this way, the data change can be quickly captured and responded to, improving the immediate response ability of the system, so that the current operating state of the oil pump can be accurately reflected.

[0117] In some embodiments, when the target state is an abnormal state and the duration of the target state is the first duration, a power control instruction is sent to the motor. The power control instruction is used to indicate controlling the output power of the motor. The abnormal state includes at least one of the following: the blocked state of the oil pump, the suspected blocked state of the oil pump, the suspected oil leakage state of the oil pump, the oil leakage state of the oil pump, and the damaged state of the oil pump.

[0118] In a possible design, the power control instruction includes a power control coefficient, which is used to adjust the output power of the motor. One abnormal state corresponds to one power control coefficient. The power control coefficient corresponding to the suspected blocked state of the oil pump is greater than the power control coefficient corresponding to the suspected oil leakage state of the oil pump, and the corresponding power control coefficient is greater than the power control coefficient corresponding to the oil leakage state of the oil pump.

[0119] Optionally, the power control coefficient is greater than 0 and less than 1.

[0120] It should be noted that the power control coefficients of different electric drive devices have different values.

[0121] It should be noted that the power control coefficients of different electric drive devices in different abnormal states can be different.

[0122] It should be noted that the viscosity of the oil is negatively correlated with the magnitude of the current. Under normal ambient temperatures, the viscosity of the oil decreases as the temperature of the oil pump increases, and the viscosity of the oil is negatively correlated with the temperature of the oil pump.

[0123] Exemplarily, the kinematic viscosity can satisfy Formula One.

[0124]

[0125] Where η is the kinematic viscosity of the fluid, A is the pre-factor used to adjust the strength of the intermolecular interactions of the fluid. Ea is the activation energy, R is the proportionality constant, and T is the temperature of the fluid.

[0126] It should be noted that the oil pump has different resistance coefficients under different temperatures and loads. Since the current and the load are in a relatively linear or curvilinear relationship, curve fitting is performed based on empirical data. At the same rotational speed of the oil pump and different temperatures, its load current will decrease as the temperature increases.

[0127] Exemplarily, the relationship between the current and the load can satisfy Formula Two.

[0128] I η = K1·η 2 + K2·η + I0 Formula Two.

[0129] Where I η is the load current of the oil pump, K1 is used to quantify the influence of the square of the kinematic viscosity of the fluid on the current, K2 is used to quantify the influence of the kinematic viscosity of the fluid on the current, used to adjust the kinematic viscosity of the fluid, and I0 is the base current value or current constant.

[0130] Optionally, K1 and K2 are constants.

[0131] It can be understood that when the target state is an abnormal state, by controlling the output power of the motor, the temperature of the oil pump (i.e., the temperature of the oil pumped by the oil pump) can be adjusted, and then the current of the oil pump can be adjusted so that the current of the oil pump is between the high-load current threshold and the low-load current threshold, so that the oil pump can operate normally. Further, on the premise of the same electric drive power output, within a certain period of time, the temperature of the oil pumped by the oil pump in the suspected oil pump blockage state is lower than the temperature in the suspected oil pump leakage state, and the temperature in the suspected oil pump leakage state is lower than the temperature in the oil pump leakage state. Therefore, by setting different power control coefficients for different abnormal states, the state of the oil pump can be adjusted more precisely, enhancing the stability of the system.

[0132] In some embodiments, after sending a power control command to the motor, the target state of the oil pump can be updated. Then, when the updated target state is an abnormal state and the duration of the updated target state is the second duration, a stop command can be sent to the motor, and the stop command is used to instruct to control the motor to stop outputting power.

[0133] It can be understood that if the updated target state is still an abnormal state, it means that the state of the oil pump cannot be adjusted. At this time, sending a stop command to the motor can avoid further damage to the vehicle, prevent accidents, and ensure the safety of users.

[0134] The embodiments of the present application will be introduced below with specific examples.

[0135] Exemplarily, as Figure 5 shown, when the rotational speed of the oil pump is the current rotational speed, a preset current threshold group corresponding to each preset temperature and each preset rotational speed can be obtained. Based on multiple preset current threshold groups, a preset operating condition line can be obtained. The preset operating condition line includes at least one of the following: a current blockage line (i.e., the In blockage operating condition line), a current load line (i.e., the In load operating condition line), a current leakage line (i.e., the In leakage idling operating condition line), and a current idling line (i.e., the In idling operating condition line). The current blockage line includes multiple abnormal high-load thresholds, the current load line includes multiple preset load current thresholds, the current leakage line includes multiple leakage current thresholds, and the current idling line includes multiple abnormal low-load thresholds.

[0136] Optionally, the preset operating condition line further includes: a current high-load line (i.e., the △In high-load operating condition line) and a current low-load line (i.e., the △In low-load operating condition line). The current high-load line includes multiple high-load current thresholds, and the current low-load line includes multiple low-load current thresholds.

[0137] If the current current meets the normal load condition (i.e., the current current is in the region between △In high load and △In low load), and the duration is greater than the preset diagnosis time, the target state of the oil pump can be determined to be the normal state.

[0138] If the current current meets the abnormal high load condition (i.e., the current current is in the region above the In stall operating line), and the duration is greater than the preset diagnosis time, the target state of the oil pump can be determined to be the oil pump stall state.

[0139] It should be noted that the region where the current current is above the In stall operating line indicates that the load condition of the oil pump is extremely high at this time, and the target state of the oil pump can be determined to be the oil pump stall state.

[0140] If the current current meets the high load condition (i.e., the current current is between the In load operating line and the In stall operating line, and above the △In high load operating line), and the duration is greater than the preset diagnosis time, the target state of the oil pump can be determined to be the suspected oil pump stall state.

[0141] Exemplarily, the region between the In load operating line and the In stall operating line, and above the △In high load operating line includes: Area A, Area B, Area C, Area D, and Area E.

[0142] It should be noted that the region where the current current is between the In stall operating line and the △In high load operating line indicates that the load condition of the oil pump is on the high side at this time, and the target state of the oil pump can be determined to be the suspected oil pump stall state.

[0143] If the current current meets the low load condition (i.e., the current current is in the region between the In load operating line and the In oil leakage idling operating line, and below the △In low load operating line), and the duration is greater than the preset diagnosis time, the target state of the oil pump can be determined to be the suspected oil pump oil leakage state.

[0144] Exemplarily, the region between the In load operating line and the In oil leakage idling operating line, and below the △In low load operating line includes: Area F, Area G, Area H, Area I, and Area J.

[0145] It should be noted that the region where the current current is between the △In low load operating line and the In oil leakage idling operating line indicates that the load condition of the oil pump is on the low side at this time, and the cooling condition is insufficient, and the target state of the oil pump can be determined to be the suspected oil pump oil leakage state.

[0146] If the current current meets the oil leakage load condition (i.e., the current current is in the region between the In oil leakage idling operating line and the In idling operating line), and the duration is greater than the preset diagnosis time, the target state of the oil pump can be determined to be the oil pump oil leakage state.

[0147] Exemplarily, the area between the In oil leakage idling condition line and the In idling condition line includes: area K, area L, area M, area N, and area O.

[0148] It should be noted that when the current is in the area between the In oil leakage idling condition line and the In idling condition line, it indicates that the oil pump load condition is abnormally low at this time, and it can be determined that the target state of the oil pump is the oil pump leakage state.

[0149] If the current satisfies the low-load condition (i.e., the current is in the area between the In idling condition line and 0), and the duration is greater than the preset diagnosis time, it can be determined that the target state of the oil pump is the oil pump damaged state.

[0150] It should be noted that when the current is in the area between the In idling condition line and 0, it indicates that the oil pump function is limited or not working at this time, and the oil pump cannot provide cooling capacity, and it can be determined that the target state of the oil pump is the oil pump damaged state.

[0151] It should be noted that T2 + N is greater than T2, T2 is greater than T1, and T1 is greater than 0.

[0152] It should be noted that this application does not limit the preset diagnosis time. For example, the preset diagnosis time can be 3 seconds, 5 seconds, 8 seconds, 10 seconds, 13 seconds.

[0153] The above mainly introduces the solution provided by the embodiments of this application from the perspective of the method. To implement the above functions, the device for determining the oil pump state includes the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed herein, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians 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.

[0154] The embodiments of this application can divide the functional modules of the device for determining the oil pump state according to the above method. For example, the device for determining the oil pump state can include each functional module corresponding to each functional division, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. It should be noted that the division of modules in the embodiments of this application is illustrative, only a logical functional division, and there can be other division methods in actual implementation.

[0155] Figure 6It is a schematic structural diagram of a device for determining the state of an oil pump shown according to an exemplary embodiment. Refer to Figure 6 , the device for determining the state of the oil pump includes an acquisition module 601 and a processing module 602.

[0156] The acquisition module 601 is used to acquire the current state data of the oil pump, and the current state data includes: current temperature, current speed, and current current. The processing module 602 is used to determine a target state condition based on the current temperature and the current speed, and the target state condition is used to determine the current operating state of the oil pump. The processing module 602 is further used to determine the target state of the oil pump based on the current current and the target state condition, and the target state is used to indicate whether the operating state of the oil pump is abnormal.

[0157] Regarding the device in the above embodiment, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein.

[0158] Figure 7 It is a schematic structural diagram of another device for determining the state of an oil pump shown according to an exemplary embodiment. As Figure 7 shown, the device for determining the state of the oil pump includes but is not limited to: a processor 701 and a memory 702.

[0159] Among them, the above-mentioned memory 702 is used to store the executable instructions of the above-mentioned processor 701. It can be understood that the above-mentioned processor 701 is configured to execute instructions to implement the method for determining the state of the oil pump in the above embodiment.

[0160] It should be noted that those skilled in the art can understand that Figure 7 the structural diagram of the device for determining the state of the oil pump shown in Figure 7 does not constitute a limitation on the device for determining the state of the oil pump. The device for determining the state of the oil pump may include more or fewer components than

[0161] shown, or combine certain components, or have different component arrangements. The processor 701 is the control center of the device for determining the state of the oil pump, connects various parts of the entire device for determining the state of the oil pump using various interfaces and lines, and executes various functions and processes data of the device for determining the state of the oil pump by running or executing software programs and / or modules stored in the memory 702, and calling data stored in the memory 702, thereby monitoring the entire device for determining the state of the oil pump. The processor 701 may include one or more processing units. Optionally, the processor 701 may integrate an application processor and a modulation and demodulation processor. Among them, the application processor mainly processes the operating system, user interface, and application programs, etc., and the modulation and demodulation processor mainly processes wireless communication. It can be understood that the above-mentioned modulation and demodulation processor may not be integrated into the processor 701 either.

[0162] The memory 702 can be used to store software programs and various data. The memory 702 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). In addition, the memory 702 can include high-speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0163] In an exemplary embodiment, the embodiment of the present application further provides a vehicle, which includes a device for determining the state of an oil pump. The vehicle can execute the method in the above embodiment through the device for determining the state of the oil pump.

[0164] In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as the memory 702 including instructions. The above instructions can be executed by the processor 701 of the device for determining the state of the oil pump to implement the method in the above embodiment.

[0165] In actual implementation, Figure 6 the functions of the acquisition module 601 and the processing module 602 in Figure 7 can be implemented by the processor 701 in

[0166] calling the computer program stored in the memory 702. The specific execution process can refer to the description of the method part in the above embodiment, and will not be repeated here.

[0167] Optionally, the computer-readable storage medium can be a non-transitory computer-readable storage medium. For example, the non-transitory computer-readable storage medium can be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0168] It should be noted that when the instructions in the above computer-readable storage medium or the one or more instructions in the computer program product are executed by the processor of the device for determining the state of the oil pump, each process of the above method embodiment is implemented, and the same technical effects as the above method can be achieved. To avoid repetition, it will not be repeated here.

[0169] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above function modules is used as an example. In actual applications, the above functions can be allocated to different function modules as needed, that is, the internal structure of the device is divided into different function modules to complete all or part of the functions described above.

[0170] In several embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, 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 displayed or discussed mutual coupling, direct coupling or communication connection may be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0171] The unit described as a separated component may or may not be physically separated. The component displayed as a unit may be a physical unit or multiple physical units, that is, it can be located in one place, or it can be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0172] In addition, each functional unit in various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0173] 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 such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the methods in various embodiments of the present application. The foregoing storage medium includes: USB flash drive, mobile hard disk, ROM, RAM, magnetic disk or optical disc and other various media that can store program codes.

[0174] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for determining an oil pump state, characterized in that: The method comprises: Acquire current state data of the oil pump, the current state data including: current temperature, current speed, and current current; Determining a target state condition based on the current temperature and the current speed, wherein the target state condition is used to determine a current operating state of the oil pump; Based on the current current and the target state condition, a target state of the oil pump is determined, where the target state is used to indicate whether an operating state of the oil pump is abnormal.

2. The method for determining the oil pump state according to claim 1, characterized in that: The determining of the target state condition based on the current temperature and the current rotation speed includes: Based on the current temperature and the current speed, determining a target current threshold group from a plurality of preset current threshold groups, one preset current threshold group corresponding to a preset temperature and a preset speed, the target current threshold group corresponding to the current temperature and the current speed; Based on the target current threshold set, a target state condition is determined.

3. The method for determining the oil pump state according to claim 2, characterized in that: The preset current threshold group includes at least one of the following: a high load current threshold and a low load current threshold, wherein the high load current threshold is greater than the low load current threshold; The target state condition includes at least one of the following: an abnormal load condition and a normal load condition; the normal load condition includes: the current current is less than or equal to the high load current threshold, and the current current is greater than or equal to the low load current threshold; The abnormal load condition includes at least one of the following: the current current is greater than the high load current threshold, and the current current is less than the low load current threshold.

4. The method for determining the oil pump state according to claim 3, characterized in that: The preset current threshold group further includes at least one of the following: an abnormally high load threshold, an oil leakage current threshold, and an abnormally low load threshold, wherein the abnormally high load threshold is greater than the high load current threshold, the low load current threshold is greater than the oil leakage current threshold, and the oil leakage current threshold is greater than the abnormally low load threshold; The abnormal load conditions specifically include: abnormally high load conditions, high load conditions, low load conditions, oil leakage load conditions and abnormally low load conditions; the abnormally high load condition is: the current current is greater than or equal to the abnormally high load threshold; the high load condition is: the current current is less than the abnormally high load threshold, and the current current is greater than the high load current threshold; the low load condition is: the current current is less than the low load current threshold, and the current current is greater than the oil leakage current threshold; the oil leakage load condition is: the current current is less than or equal to the oil leakage current threshold, and the current current is greater than or equal to the abnormally low load threshold; the abnormally low load condition is: the current current is less than the abnormally low load threshold.

5. The method for determining the oil pump state according to claim 4, characterized in that: The step of determining the target state of the oil pump based on the current current and the target state condition includes: If the current current meets the normal load condition, determining that the target state of the oil pump is a normal state of the oil pump; If the current current meets the abnormally high load condition, determining that the target state of the oil pump is an oil pump stall state; If the current current meets the high load condition, determining that the target state of the oil pump is a suspected oil pump stall state; If the current current satisfies the low load condition, determining that the target state of the oil pump is a suspected oil pump leakage state; If the current current satisfies the oil leakage load condition, determining that the target state of the oil pump is an oil pump oil leakage state; If the current current satisfies the abnormally low load condition, the target state of the oil pump is determined to be an oil pump damage state.

6. The method for determining the oil pump state according to claim 5, characterized in that: The method for determining the oil pump state further includes: When the target state is an abnormal state and the duration of the target state is a first duration, a power control instruction is sent to the motor, and the power control instruction is used to instruct to control the output power of the motor, and the abnormal state includes at least one of the following: the oil pump stuck state, the suspected oil pump stuck state, the suspected oil pump leakage state, the oil pump leakage state, and the oil pump damaged state.

7. The method for determining the oil pump state according to claim 6, characterized in that: The power control instruction includes a power control coefficient, which is used to adjust the output power of the motor. One abnormal state corresponds to one power control coefficient. The power control coefficient corresponding to the suspected oil pump stuck state is greater than the power control coefficient corresponding to the suspected oil pump leakage state. The corresponding power control coefficient is greater than the power control coefficient corresponding to the oil pump leakage state.

8. The method for determining the oil pump state according to claim 6, characterized in that: After sending the power control instruction to the motor, the method for determining the oil pump state further includes: updating a target state of the oil pump; In a case where the updated target state is the abnormal state and the duration of the updated target state is the second duration, a stop instruction is sent to the motor, where the stop instruction is used to instruct the motor to stop outputting power.

9. The method for determining the oil pump state according to any one of claims 2 to 8, characterized in that: The determining of a target current threshold group from a plurality of preset current threshold groups based on the current temperature and the current rotation speed comprises: The current temperature and the current speed are input into a state determination model to obtain the target current threshold group. The state determination model is used to determine the preset current threshold group corresponding to the oil pump when the temperature of the oil pump is the preset temperature and the speed of the oil pump is the preset speed.

10. A device for determining an oil pump state, characterized in that: The device comprises an acquisition module and a processing module; The acquisition module is used to acquire current state data of the oil pump, and the current state data includes: current temperature, current speed, and current current; The processing module is used to determine a target state condition based on the current temperature and the current speed, wherein the target state condition is used to determine a current operating state of the oil pump; The processing module is further used to determine a target state of the oil pump based on the current current and the target state condition, wherein the target state is used to indicate whether the operating state of the oil pump is abnormal.

11. A device for determining an oil pump state, 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 for determining the oil pump state according to any one of claims 1 to 9.

12. A vehicle, characterized in that: The vehicle comprises the oil pump state determination device according to claim 10 .

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