Water pump control method, device and equipment, vehicle and medium

Abstract

The invention relates to a water pump control method, device and equipment, a vehicle and a medium. The method comprises the steps that based on the current rotating speed and the current torque of a motor in the electric driving system, the corresponding first water flow rate of the electric driving system under the condition that the electric driving system needs to be cooled is obtained; based on the current temperature of at least one component in the electric driving system, obtaining a corresponding second water flow rate of the electric driving system under the condition that the electric driving system needs to be cooled; and a water flow request of the target water flow is sent to the water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric driving system, and the target water flow is the maximum value of the first water flow and the second water flow. According to the embodiment of the invention, the target water flow capable of cooling the electric driving system can be quickly determined, the target water flow can be conveniently transmitted to the electric driving system by the water pump, and the response speed is high, so that a relatively large water flow does not need to be started in advance, the energy consumption is favorably reduced, and the electric driving system can be timely cooled.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle cooling technology, and in particular to a water pump control method, device, equipment, vehicle and medium. Background Art

[0002] The electric drive system (including the motor and motor controller) is an important component in the vehicle. When its temperature is too high, it may malfunction, which is not conducive to driving safety. Therefore, by adjusting the water flow to cool it, it can play a role in over-temperature protection, while ensuring that the motor controller and motor can work at the appropriate water temperature.

[0003] In the prior art, the thermal management system actually tests the water flow of the whole vehicle and calibrates the cooling water pump output characteristics based on the power module chip temperature, motor temperature and torque request through the vehicle flow test and calibration method. Specifically, the relationship between the three parameters of chip temperature, motor temperature and torque request and the water flow that keeps the electric drive system at a safe temperature is obtained, so as to control the water pump speed according to the relevant temperature and torque of the motor to achieve the purpose of cooling the electric drive system. However, in the above scheme, on the one hand, due to the small thermal capacity of components such as insulated gate bipolar transistors (IGBT) and SiC (silicon carbide) in the electric drive system, when the motor outputs a large torque, the temperature rise changes very quickly, and the chip heats up quickly, and a large water flow needs to be opened in advance, which will increase energy consumption; on the other hand, when the base temperature is low, the prior art cannot meet the timely heat dissipation requirements under high torque conditions. Therefore, a water pump control method is needed to control the water pump to transmit water flow to the electric drive system, so that the electric drive system can be cooled in time. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a water pump control method, device, equipment, vehicle and medium.

[0005] In a first aspect, the present disclosure provides a water pump control method, comprising:

[0006] Based on the current speed and current torque of the motor in the electric drive system, obtaining a first water flow rate corresponding to the electric drive system when cooling is required;

[0007] Based on the current temperature of at least one component in the electric drive system, obtaining a second water flow rate corresponding to the electric drive system when cooling is required;

[0008] A water flow request including a target water flow is sent to a water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system, wherein the target water flow is the maximum value of the first water flow and the second water flow, and the target water flow is used to cool the electric drive system.

[0009] Optionally, obtaining a first water flow rate corresponding to the electric drive system when cooling is required based on a current speed and a current torque of a motor in the electric drive system includes:

[0010] Acquiring a current rotation speed and a current torque of the motor in the electric drive system;

[0011] Based on the current speed and the current torque, a basic water flow corresponding to the electric drive system is obtained by querying a mapping relationship diagram between different torques, different speeds and water flow rates;

[0012] Based on the basic water flow rate and the preset water flow rate, the first water flow rate corresponding to the electric drive system when cooling is required is obtained.

[0013] Optionally, obtaining the first water flow corresponding to the electric drive system when cooling is required based on the basic water flow and the preset water flow includes:

[0014] When the basic water flow rate is greater than or equal to the preset water flow rate, determining the basic water flow rate as the first water flow rate;

[0015] or,

[0016] When the basic water flow rate is less than the preset water flow rate, the preset water flow rate is determined as the first water flow rate.

[0017] Optionally, obtaining a second water flow rate corresponding to the electric drive system when cooling is required based on the current temperature of at least one component in the electric drive system includes:

[0018] Acquiring a current temperature of at least one component in the electric drive system;

[0019] According to the current temperature of each component, query the mapping relationship table between different temperatures of each component and water flow, determine the reference water flow corresponding to the current temperature of each component, and obtain at least one reference water flow;

[0020] The reference water flow rate with the largest value among the at least one reference water flow rate is determined as the second water flow rate.

[0021] Optionally, the method further includes:

[0022] receiving an actual water flow rate sent by the water pump;

[0023] The target water flow rate is subtracted from the actual water flow rate to obtain a deviation water flow rate, wherein the deviation water flow rate is used to determine whether a cooling requirement of the electric drive system is met.

[0024] Optionally, a central domain controller is included between the electric drive system and the water pump, and the central domain controller is communicatively connected with the electric drive system and the water pump respectively;

[0025] The step of sending a water flow request including a target water flow to the water pump comprises:

[0026] The water flow request including the target water flow is sent to the central domain controller, so that the central domain controller sends the water flow request to the water pump.

[0027] Optionally, the at least one component is determined from a stator, a rotor, a bearing, a reducer and an oil pump of the motor.

[0028] In a second aspect, the present disclosure provides a water pump control device, comprising:

[0029] A first determination module, configured to obtain, based on a current rotation speed and a current torque of a motor in the electric drive system, a first water flow rate corresponding to the electric drive system when cooling is required;

[0030] A second determination module, configured to obtain, based on a current temperature of at least one component in the electric drive system, a second water flow rate corresponding to the electric drive system when cooling is required;

[0031] A transmission module is used to send a water flow request including a target water flow to a water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system, wherein the target water flow is the maximum value of the first water flow and the second water flow, and the target water flow is used to cool the electric drive system.

[0032] Optionally, the first determining module includes:

[0033] A first acquisition unit, used to acquire a current speed and a current torque of the motor in the electric drive system;

[0034] A first determining unit is configured to obtain a basic water flow corresponding to the electric drive system by querying a mapping relationship diagram between different torques, different speeds, and water flows based on the current speed and the current torque;

[0035] The second determining unit is used to obtain the first water flow corresponding to the electric drive system when cooling is required based on the basic water flow and the preset water flow.

[0036] Optionally, the second determining unit is specifically configured to:

[0037] When the basic water flow rate is greater than or equal to the preset water flow rate, determining the basic water flow rate as the first water flow rate;

[0038] or,

[0039] When the basic water flow rate is less than the preset water flow rate, the preset water flow rate is determined as the first water flow rate.

[0040] Optionally, the second determining module is specifically configured to:

[0041] Acquiring a current temperature of at least one component in the electric drive system;

[0042] According to the current temperature of each component, query the mapping relationship table between different temperatures of each component and water flow, determine the reference water flow corresponding to the current temperature of each component, and obtain at least one reference water flow;

[0043] The reference water flow rate with the largest value among the at least one reference water flow rate is determined as the second water flow rate.

[0044] Optionally, the above device further comprises:

[0045] The receiving module is specifically used to: receive the actual water flow sent by the water pump;

[0046] The deviation module is specifically used to: subtract the target water flow from the actual water flow to obtain a deviation water flow, wherein the deviation water flow is used to determine whether the cooling demand of the electric drive system is met.

[0047] Optionally, a central domain controller is included between the electric drive system and the water pump, and the central domain controller is communicatively connected with the electric drive system and the water pump respectively;

[0048] The transmission module is specifically used for:

[0049] The water flow request including the target water flow is sent to the central domain controller, so that the central domain controller sends the water flow request to the water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system.

[0050] Optionally, the at least one component is determined from a stator, a rotor, a bearing, a reducer and an oil pump of the motor.

[0051] In a third aspect, the present disclosure further provides an electronic device, including:

[0052] one or more processors;

[0053] a storage device for storing one or more programs,

[0054] When the one or more programs are executed by the one or more processors, the one or more processors implement any one of the water pump control methods described in the embodiments of the present disclosure.

[0055] In a fourth aspect, the present disclosure further provides a vehicle, comprising the electronic device as described in the third aspect.

[0056] In a fifth aspect, the present disclosure further provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the water pump control method described in any one of the embodiments of the present disclosure is implemented.

[0057] The technical solution provided by the embodiment of the present disclosure has the following advantages compared with the prior art: based on the current speed and current torque of the motor in the electric drive system, a first water flow rate corresponding to the electric drive system when cooling is required is obtained; based on the current temperature of at least one component in the electric drive system, a second water flow rate corresponding to the electric drive system when cooling is required is obtained; a water flow rate request for the target water flow rate is sent to the water pump, so that the water pump transmits the target water flow rate corresponding to the water flow rate request to the electric drive system. Through the above technical solution, the maximum value is determined as the target water flow rate from the first water flow rate and the second water flow rate corresponding to the electric drive system when cooling is required, and the target water flow rate that can cool the electric drive system can be quickly determined. The target water flow rate fully considers the cooling requirements of the electric drive system, which facilitates the water pump to directly transmit cooling water of the target water flow rate to the electric drive system. Due to its fast response speed, there is no need to open a larger water flow rate in advance, which is beneficial to reducing energy consumption and can cool the electric drive system in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0059] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0060] Figure 1is a flow chart of a water pump control method provided by an embodiment of the present disclosure;

[0061] Figure 2A is a flow chart of another water pump control method provided by an embodiment of the present disclosure;

[0062] Figure 2B It is a schematic diagram of a mapping relationship between different torques, different rotation speeds and water flow rates provided by an embodiment of the present disclosure;

[0063] Figure 2C is another schematic diagram of mapping relationship between different torques, different rotation speeds and water flow rates provided by an embodiment of the present disclosure;

[0064] Figure 2D It is a structural schematic diagram of various modules involved in the water pump control method provided in an embodiment of the present disclosure;

[0065] Figure 3 is a structural schematic diagram of a water pump control device provided by an embodiment of the present disclosure;

[0066] Figure 4 It is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0067] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0068] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0069] Figure 1 is a flow chart of a water pump control method provided by an embodiment of the present disclosure. This embodiment can be applied to the case where the electric drive system is cooled to achieve the purpose of heat dissipation. The method of this embodiment can be executed by a water pump control device, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method specifically includes the following:

[0070] S110, based on the current rotation speed and current torque of the motor in the electric drive system, obtain a first water flow rate corresponding to the electric drive system when cooling is required.

[0071] The electric drive system may be understood as a system including a motor, a motor controller and a transmission mechanism.

[0072] Specifically, in order to keep the electric drive system within a safe temperature range, the electric drive system needs to be cooled to prevent it from malfunctioning when the temperature is too high. Therefore, it is necessary to determine the water flow rate that can cool the electric drive system. The determination of the water flow rate is related to the current speed and current torque of the motor in the electric drive system. After obtaining the current speed and current torque of the motor, the electric drive system (mainly the motor controller included in the electric drive system) can determine the first water flow rate corresponding to the current speed and current torque of the motor when the electric drive system needs to be cooled through the corresponding relationship between the two parameters of different speeds and different torques and the water flow rate, such as a mapping relationship diagram or a corresponding relationship table.

[0073] It should be noted that the corresponding relationship between the two parameters of different rotation speeds and different torques and the water flow rate can be calibrated in advance through experiments, and can also be determined according to specific circumstances, and this embodiment does not make specific limitations.

[0074] S120, based on the current temperature of at least one component in the electric drive system, obtain a second water flow rate corresponding to the electric drive system when cooling is required.

[0075] The current temperature of at least one component may be understood as the current temperature of a relevant component included in the electric drive system in the process of determining the water flow required when the electric drive system needs to be cooled.

[0076] Specifically, the determination of the water flow rate required for the electric drive system when cooling is required is also related to the current temperature of at least one component in the electric drive system. Generally, the current temperature of at least one component and the required water flow rate for cooling are positively correlated, that is, when the current temperature of at least one component is high, the water flow rate required for cooling the electric drive system is large; when the current temperature of at least one component is low, the water flow rate required for cooling the electric drive system is small. The electric drive system (mainly the motor controller included in the electric drive system) can obtain the current temperature of at least one component in the electric drive system through a temperature sensor, and according to the corresponding relationship between the current temperature and the water flow rate, the second water flow rate corresponding to the electric drive system when cooling is required can be obtained.

[0077] S130, sending a water flow request including a target water flow to the water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system.

[0078] The target water flow rate is the maximum value of the first water flow rate and the second water flow rate, and the target water flow rate is used to cool the electric drive system.

[0079] Specifically, after obtaining the first water flow rate and the second water flow rate, the motor controller in the electric drive system determines the maximum value of the first water flow rate and the second water flow rate as the target water flow rate, and sends a water flow rate request including the target water flow rate to the water pump. Correspondingly, after receiving the water flow rate request, the water pump controls its own rotation speed according to the target water flow rate in the water flow rate request, and transmits cooling water of the target water flow rate to the electric drive system to cool the electric drive system. Since the electric drive system includes a motor and a motor controller, the water pump transmits cooling water of the target water flow rate to the motor controller, and the cooling water is transmitted to the motor through the motor controller for cooling, thereby achieving cooling of the motor and the motor controller.

[0080] It should be noted that the electric drive system and the water pump may include a communication module that enables the two to communicate, thereby facilitating data transmission between the two.

[0081] The present embodiment provides a water pump control method, based on the current speed and current torque of the motor in the electric drive system, obtaining a first water flow corresponding to the electric drive system when cooling is required; based on the current temperature of at least one component in the electric drive system, obtaining a second water flow corresponding to the electric drive system when cooling is required; sending a water flow request of a target water flow to the water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system. Through the above technical solution, from the first water flow and the second water flow corresponding to the electric drive system when cooling is required, the maximum value is determined as the target water flow, and the target water flow that can cool the electric drive system can be quickly determined. The electric drive system determines the target water flow based on its own loss and over-temperature protection requirements (i.e., the current speed, the current torque and the current temperature of at least one component). The target water flow fully considers the cooling requirements of the electric drive system, so that the water pump directly transmits cooling water of the target water flow to the electric drive system. Due to its fast response speed, there is no need to open a large water flow in advance, which is beneficial to reducing energy consumption and being able to cool the electric drive system in time.

[0082] In some embodiments, optionally, based on the current temperature of at least one component in the electric drive system, obtaining a second water flow rate corresponding to the electric drive system when cooling is required includes:

[0083] obtaining a current temperature of at least one component in the electric drive system;

[0084] According to the current temperature of each component, query the mapping relationship table between different temperatures of each component and water flow, determine the reference water flow corresponding to the current temperature of each component, and obtain at least one reference water flow;

[0085] The reference water flow rate with the largest value among the at least one reference water flow rate is determined as the second water flow rate.

[0086] Among them, the components can be understood as hardware devices or functional modules included in the electric drive system, etc., which are not specifically limited here. The mapping relationship table between the different temperatures and water flow rates of each component can be pre-calibrated or determined according to specific circumstances, which is not specifically limited here. Usually, the mapping relationship tables corresponding to different components are different, that is, each component corresponds to a mapping relationship table.

[0087] Specifically, the current temperature of at least one component in the electric drive system can be obtained through the temperature sensor. After obtaining the current temperature of at least one component, each component is taken as the current component in turn for the current temperature of each component, and according to the current temperature of the current component, a mapping relationship table between different temperatures of the current component and the water flow rate is queried to determine the reference water flow rate corresponding to the current temperature of the current component. According to this method, at least one reference water flow rate can be obtained. Then, the reference water flow rate with the largest value among the at least one reference water flow rate is determined as the second water flow rate.

[0088] Exemplarily, Table 1 is a mapping relationship table between the stator temperature of the motor and the reference water flow rate, as shown in Table 1 below:

[0089] Table 1

[0090] Stator temperature(℃) Reference water flow (L) (T0, T1) f0 [T1,T2) f1 [T2,T3) f2 [T3,T4) f3 [T4，+∞) f4

[0091] Among them, f4>f3>f2>f1>f0.

[0092] Specifically, as shown in Table 1, if the temperature of the electrons in the motor is between (T0, T1), the reference water flow rate is determined to be f0; if the temperature of the electrons in the motor is between [T1, T2), the reference water flow rate is determined to be f1; if the temperature of the electrons in the motor is between [T2, T3), the reference water flow rate is determined to be f2; if the temperature of the electrons in the motor is between [T3, T4), the reference water flow rate is determined to be f3; if the temperature of the electrons in the motor is between [T4, +∞), the reference water flow rate is determined to be f4.

[0093] In this embodiment, since there is more than one component in the electric drive system, determining the second water flow rate by the above method is more in line with the actual situation and more accurate, which is conducive to the subsequent determination of the target water flow rate.

[0094] In some embodiments, optionally, at least one component is determined from a stator, a rotor, a bearing, a reducer, and an oil pump of the motor.

[0095] Among them, the stator is an important part of the motor, which consists of three parts: the stator core, the stator winding and the frame. Its main function is to generate a rotating magnetic field. The rotor is the rotating part of the motor. Its main function is to be cut by the magnetic lines of force in the rotating magnetic field and then generate (output) current. The bearing is an important component in mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. The reducer is a reduction transmission device. The oil pump is mainly used to provide oil cooling.

[0096] In this embodiment, the stator, rotor, bearing, reducer and oil pump of the motor are important components of the motor, and their temperatures may affect the determination of the water flow rate. Therefore, at least one component can be determined from the above components.

[0097] Figure 2A FIG. 1 is a flow chart of another water pump control method provided by an embodiment of the present disclosure. Figure 2A As shown, the method specifically includes the following:

[0098] S210, obtaining a current rotation speed and a current torque of a motor in the electric drive system.

[0099] Specifically, the motor controller in the electric drive system can obtain the current speed and current torque of the motor through a display screen, or through a measuring instrument, or through an estimation model, or other methods, which are not specifically limited in this embodiment.

[0100] S220, based on the current speed and the current torque, obtain the basic water flow corresponding to the electric drive system by querying a mapping relationship diagram between different torques, different speeds and water flow rates.

[0101] Specifically, after obtaining the current speed and current torque of the motor, the motor controller in the electric drive system can obtain the basic water flow corresponding to the electric drive system based on the current speed and current torque by querying the mapping relationship diagram between different torques, different speeds and water flow rates.

[0102] For example, Figure 2B 1 is a schematic diagram of a mapping relationship between different torques, different speeds and water flow rates provided by an embodiment of the present disclosure, and is a schematic diagram of a mapping relationship obtained when the motor is in a driving state (ie, the torque is greater than 0). Figure 2B As shown, the horizontal axis is the speed n, the unit is: r / min (revolution / minute), the vertical axis is the torque T, the unit is: N·m, the vertical axis value is greater than 0, the numbers in the box such as 1, 2, 4, 6 and 8 are the water flow, the unit is L (liter), after obtaining the current speed and current torque of the motor, query Figure 2B, we can get the basic water flow rate corresponding to the electric drive system. For example, assuming the speed is 5000r / min and the torque is 150N·m, query Figure 2B It can be seen that the basic water flow rate is 4L.

[0103] It should be noted that: Figure 2B In the calculation, when the value of a certain speed and a certain torque falls within a certain square, the corresponding basic water flow rate is the value within the square.

[0104] For example, Figure 2C 1 is another schematic diagram of the mapping relationship between different torques, different speeds and water flow rates provided by the embodiment of the present disclosure, which is a schematic diagram of the mapping relationship obtained when the motor is in a power generation state (ie, the torque is less than 0). Figure 2C As shown, the horizontal axis is the rotation speed n, the unit is: r / min (revolution / minute), the vertical axis is the torque T, the unit is: N·m, and the value of the vertical axis is less than 0. Figure 2C Except for the value of the vertical axis which is less than 0, the rest are the same as Figure 2B To avoid repetition, they are not described here again.

[0105] S230: Based on the basic water flow rate and the preset water flow rate, obtain a first water flow rate corresponding to the electric drive system when cooling is required.

[0106] The preset water flow rate may be understood as the minimum water flow rate required in the water pump, which may be a predetermined value or may depend on specific circumstances, and this embodiment does not make any specific limitation to this.

[0107] After obtaining the basic water flow, based on the basic water flow and the preset water flow, the average value of the two can be calculated, or the weighted average of the two can be performed (the weighting coefficients of the two are different), or the maximum value of the two can be taken, or other calculation methods can be used, etc., to determine the obtained value as the first water flow corresponding to the electric drive system.

[0108] S240: Based on the current temperature of at least one component in the electric drive system, obtain a second water flow rate corresponding to the electric drive system when cooling is required.

[0109] Please refer to the detailed description in S120, which will not be described again here to avoid repetition.

[0110] S250, sending a water flow request including a target water flow to the water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system.

[0111] Please refer to the detailed description in S130, which will not be described again here to avoid repetition.

[0112] In this embodiment, the current speed and the current torque of the motor in the electric drive system are obtained; based on the current speed and the current torque, a basic water flow corresponding to the electric drive system is obtained by querying a mapping relationship diagram between different torques, different speeds and water flow rates; based on the basic water flow rate and the preset water flow rate, a first water flow corresponding to the electric drive system when cooling is required is obtained; based on the current temperature of at least one component in the electric drive system, a second water flow corresponding to the electric drive system when cooling is required is obtained; a water flow request including a target water flow rate is sent to the water pump, so that the water pump transmits the target water flow rate corresponding to the water flow request to the electric drive system In the above technical solution, the electric drive system obtains the first water flow rate corresponding to the electric drive system when cooling is required through the basic water flow rate and the preset water flow rate, which can avoid affecting the cooling effect due to the value of the first water flow rate being too low, and the electric drive system can quickly determine the target water flow rate that can cool the electric drive system according to its own loss and over-temperature protection requirements (that is, the current speed, the current torque and the current temperature), so that the water pump can directly transmit cooling water of the target water flow rate to the electric drive system. Due to its fast response speed, there is no need to open a larger water flow rate in advance, which is beneficial to reducing energy consumption and can cool the electric drive system in time.

[0113] In some embodiments, optionally, based on the basic water flow rate and the preset water flow rate, obtaining a first water flow rate corresponding to the electric drive system when cooling is required includes:

[0114] When the basic water flow rate is greater than or equal to the preset water flow rate, determining the basic water flow rate as the first water flow rate;

[0115] or,

[0116] When the basic water flow rate is less than the preset water flow rate, the preset water flow rate is determined as the first water flow rate.

[0117] Specifically, the motor controller in the electric drive system can also determine the first water flow corresponding to the electric drive system based on the relationship between the basic water flow and the preset water flow. When the basic water flow is greater than or equal to the preset water flow, the basic water flow is determined as the first water flow corresponding to the electric drive system; or, when the basic water flow is less than the preset water flow, the preset water flow is determined as the first water flow corresponding to the electric drive system.

[0118] In this embodiment, the above method can avoid affecting the cooling effect due to the value of the first water flow being too low.

[0119] In some embodiments, optionally, the method further comprises:

[0120] Receive the actual water flow sent by the water pump;

[0121] The target water flow rate is subtracted from the actual water flow rate to obtain a deviation water flow rate, wherein the deviation water flow rate is used to determine whether the cooling demand of the electric drive system is met.

[0122] The actual water flow rate can be understood as the water flow rate currently output by the water pump.

[0123] Specifically, the water pump can send the actual water flow rate to the motor controller of the electric drive system, and accordingly, the motor controller of the electric drive system can receive the actual water flow rate sent by the water pump. The motor controller of the electric drive system subtracts the target water flow rate from the actual water flow rate to obtain the difference between the two, which is the deviation water flow rate. Through the value of the deviation water flow rate, it can be determined whether the water pump is well controlled and whether the cooling requirements of the electric drive system are met.

[0124] In this embodiment, through the above process, the electric drive system can obtain the deviation water flow rate, so as to determine its own cooling effect.

[0125] In some embodiments, optionally, a central domain controller is included between the electric drive system and the water pump, and the central domain controller is communicatively connected with the electric drive system and the water pump respectively;

[0126] Send a water flow request including a target water flow to the water pump, including:

[0127] A water flow request including a target water flow is sent to the central domain controller, so that the central domain controller sends the water flow request to the water pump.

[0128] Specifically, when a central domain controller is included between the electric drive system and the water pump, and the central domain controller is respectively communicated with the electric drive system and the water pump, the electric drive system sends a water flow request including a target water flow to the central domain controller, so that the central domain controller sends the water flow request to the water pump, ensuring that the water pump can receive the water flow request.

[0129] In this embodiment, sending the water flow request through the above process can reduce the complexity of the request logic between the electric drive system and the water pump.

[0130] In some embodiments, optionally, a central domain controller is included between the electric drive system and the water pump, and the central domain controller is communicatively connected with the electric drive system and the water pump respectively;

[0131] Receive the actual water flow sent by the pump, including:

[0132] Receives actual water flow from the pumps via the central domain controller.

[0133] Specifically, the water pump sends the actual water flow to the central domain controller, the central domain controller receives the actual water flow sent by the water pump, and sends the actual water flow to the motor controller of the electric drive system, so that the motor controller can subtract the target water flow from the actual water flow to obtain the difference between the two, which is the deviation water flow.

[0134] In this embodiment, the water pump sends the actual water flow to the motor controller through the central domain controller, and the motor controller calculates the deviation water flow, which is simple and fast and can save the computing power resources of the motor controller.

[0135] For example, Figure 2C Schematic diagram of the structure of the various modules involved in the water pump control method provided in the embodiment of the present disclosure. Figure 2C As shown, the modules involved include: a motor, a motor controller, a central domain controller and a water pump. Among them, the motor controller can obtain the current speed and current torque of the motor, so as to obtain the first water flow corresponding to the electric drive system when cooling is required according to the current speed and current torque. For details, please refer to the detailed description of S110, and the motor controller can obtain the current temperature of at least one component in the electric drive system and determine the second water flow corresponding to the electric drive system when cooling is required. For details, please refer to the detailed description of S120. Then the motor controller sends a water flow request including the target water flow to the central domain controller, so that the central domain controller sends the water flow request to the water pump. After receiving the water flow request, the water pump controls its own speed according to the target water flow in the water flow request, and transmits the cooling water of the target water flow to the motor controller. The cooling water of the target water flow is transmitted to the motor through the motor controller for cooling, thereby realizing the cooling of the motor and the motor controller. At the same time, the water pump can also send the actual water flow to the central domain controller and the motor controller. The motor controller subtracts the target water flow from the actual water flow to obtain the deviation water flow, so that the electric drive system can determine whether its cooling needs are met, that is, whether the cooling effect is achieved, based on the deviation water flow.

[0136] In some embodiments, optionally, when the electric drive system in the present solution is deployed in other types of vehicles or mechanical equipment, the cooling solution provided in the present embodiment can still be applicable, and the correspondence between the two parameters of different speeds and different torques and the water flow rate, the mapping relationship diagram between different torques, different speeds and water flow rates, and the mapping relationship table between different temperatures of each component and water flow rates do not need to be recalibrated.

[0137] Figure 3 : is a schematic diagram of the structure of a water pump control device provided in an embodiment of the present disclosure; the device is configured in an electronic device and can implement the water pump control method of any embodiment of the present application. The device specifically includes the following:

[0138] A first determination module, configured to obtain a first water flow rate corresponding to the electric drive system when cooling is required based on a current rotation speed and a current torque of the motor in the electric drive system;

[0139] A second determination module, configured to obtain a second water flow rate corresponding to the electric drive system when cooling is required based on a current temperature of at least one component in the electric drive system;

[0140] The transmission module is used to send a water flow request including a target water flow to the water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system, wherein the target water flow is the maximum value of the first water flow and the second water flow, and the target water flow is used to cool the electric drive system. In this embodiment, optionally, the first determination module 310 includes:

[0141] A first acquisition unit, used to acquire a current speed and a current torque of a motor in the electric drive system;

[0142] A first determination unit is used to obtain a basic water flow corresponding to the electric drive system based on the current speed and the current torque by querying a mapping relationship diagram between different torques, different speeds and water flows;

[0143] The second determining unit is used to obtain a first water flow corresponding to the electric drive system when cooling is required based on the basic water flow and the preset water flow.

[0144] In this embodiment, optionally, the second determining unit is specifically configured to:

[0145] When the basic water flow rate is greater than or equal to the preset water flow rate, determining the basic water flow rate as the first water flow rate;

[0146] or,

[0147] When the basic water flow rate is less than the preset water flow rate, the preset water flow rate is determined as the first water flow rate.

[0148] In this embodiment, optionally, the second determining module 320 is specifically configured to:

[0149] obtaining a current temperature of at least one component in the electric drive system;

[0150] According to the current temperature of each component, query the mapping relationship table between different temperatures of each component and water flow, determine the reference water flow corresponding to the current temperature of each component, and obtain at least one reference water flow;

[0151] The reference water flow rate with the largest value among the at least one reference water flow rate is determined as the second water flow rate.

[0152] In this embodiment, optionally, the above device further includes:

[0153] The receiving module is specifically used to: receive the actual water flow sent by the water pump;

[0154] The deviation module is specifically used to: subtract the target water flow from the actual water flow to obtain the deviation water flow, wherein the deviation water flow is used to determine whether the cooling demand of the electric drive system is met.

[0155] In this embodiment, optionally, a central domain controller is included between the electric drive system and the water pump, and the central domain controller is communicatively connected with the electric drive system and the water pump respectively;

[0156] The transmission module 330 is specifically used for:

[0157] A water flow request including a target water flow is sent to the central domain controller, so that the central domain controller sends the water flow request to the water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system.

[0158] In this embodiment, optionally, at least one component is determined from a stator, a rotor, a bearing, a reducer, and an oil pump of the motor.

[0159] Through the water pump control device provided by the embodiment of the present disclosure, based on the current speed and current torque of the motor in the electric drive system, a first water flow rate corresponding to the electric drive system when cooling is required is obtained; based on the current temperature of at least one component in the electric drive system, a second water flow rate corresponding to the electric drive system when cooling is required is obtained; a water flow request for the target water flow rate is sent to the water pump, so that the water pump transmits the target water flow rate corresponding to the water flow rate request to the electric drive system. Through the above technical scheme, the maximum value is determined as the target water flow rate from the first water flow rate and the second water flow rate corresponding to the electric drive system when cooling is required, and the target water flow rate that can cool the electric drive system can be quickly determined. The target water flow rate fully considers the cooling requirements of the electric drive system, which facilitates the water pump to directly transmit cooling water of the target water flow rate to the electric drive system. Due to its fast response speed, there is no need to open a larger water flow rate in advance, which is beneficial to reducing energy consumption and can cool the electric drive system in time.

[0160] The water pump control device provided in the embodiments of the present disclosure can execute the water pump control method provided in any embodiment of the present disclosure, and has the corresponding functional modules and beneficial effects of the execution method.

[0161] Figure 4 Schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure. Figure 4 As shown, the electronic device includes a processor 410 and a storage device 420; the number of the processor 410 in the electronic device can be one or more. Figure 4A processor 410 is taken as an example; the processor 410 and the storage device 420 in the electronic device can be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0162] The storage device 420 is a computer-readable storage medium that can be used to store software programs, computer executable programs and modules, such as program instructions / modules corresponding to the water pump control method in the embodiment of the present disclosure. The processor 410 executes various functional applications and data processing of the electronic device by running the software programs, instructions and modules stored in the storage device 420, that is, implements the water pump control method provided in the embodiment of the present disclosure.

[0163] The storage device 420 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the storage device 420 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the storage device 420 may further include a memory remotely arranged relative to the processor 410, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0164] An electronic device provided in this embodiment can be used to execute the water pump control method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

[0165] An embodiment of the present disclosure also provides a vehicle, which is configured with the electronic device provided by the present disclosure.

[0166] The embodiment of the present disclosure also provides a computer-readable storage medium containing computer-executable instructions, and the computer-executable instructions are used to implement the water pump control method provided by the embodiment of the present disclosure when executed by a computer processor.

[0167] Of course, the computer-readable storage medium containing computer-executable instructions provided in the embodiment of the present disclosure is not limited to the above method operations, and the computer-executable instructions can also execute related operations in the water pump control method provided in any embodiment of the present disclosure.

[0168] Through the above description of the implementation methods, the technical personnel in the relevant field can clearly understand that the present disclosure can be implemented by means of software and necessary general hardware, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (FLASH), a hard disk or an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment of the present disclosure.

[0169] It is worth noting that in the embodiment of the above-mentioned water pump control device, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present disclosure.

[0170] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0171] The above are only specific embodiments of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water pump control method, characterized in that: include: Based on the current speed and current torque of the motor in the electric drive system, obtaining a first water flow rate corresponding to the electric drive system when cooling is required; Based on the current temperature of at least one component in the electric drive system, obtaining a second water flow rate corresponding to the electric drive system when cooling is required; A water flow request including a target water flow is sent to a water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system, wherein the target water flow is the maximum value of the first water flow and the second water flow, and the target water flow is used to cool the electric drive system.

2. The method according to claim 1, characterized in that The obtaining, based on the current speed and the current torque of the motor in the electric drive system, a first water flow rate corresponding to the electric drive system when cooling is required comprises: Acquiring a current rotation speed and a current torque of the motor in the electric drive system; Based on the current speed and the current torque, a basic water flow corresponding to the electric drive system is obtained by querying a mapping relationship diagram between different torques, different speeds and water flow rates; Based on the basic water flow rate and the preset water flow rate, the first water flow rate corresponding to the electric drive system when cooling is required is obtained.

3. The method according to claim 2, characterized in that The obtaining, based on the basic water flow and the preset water flow, the first water flow corresponding to the electric drive system when cooling is required, comprises: When the basic water flow rate is greater than or equal to the preset water flow rate, determining the basic water flow rate as the first water flow rate; or, When the basic water flow rate is less than the preset water flow rate, the preset water flow rate is determined as the first water flow rate.

4. The method according to claim 1, characterized in that: The obtaining, based on the current temperature of at least one component in the electric drive system, a second water flow rate corresponding to the electric drive system when cooling is required comprises: Acquiring a current temperature of at least one component in the electric drive system; According to the current temperature of each component, query the mapping relationship table between different temperatures of each component and water flow, determine the reference water flow corresponding to the current temperature of each component, and obtain at least one reference water flow; The reference water flow rate with the largest value among the at least one reference water flow rate is determined as the second water flow rate.

5. The method according to claim 1, characterized in that The method further comprises: receiving an actual water flow rate sent by the water pump; The target water flow rate is subtracted from the actual water flow rate to obtain a deviation water flow rate, wherein the deviation water flow rate is used to determine whether a cooling requirement of the electric drive system is met.

6. The method according to claim 1, characterized in that A central domain controller is included between the electric drive system and the water pump, and the central domain controller is communicatively connected with the electric drive system and the water pump respectively; The step of sending a water flow request including a target water flow to the water pump comprises: The water flow request including the target water flow is sent to the central domain controller, so that the central domain controller sends the water flow request to the water pump.

7. The method according to claim 4, characterized in that The at least one component is determined from a stator, a rotor, a bearing, a speed reducer and an oil pump of the motor.

8. A water pump control device, characterized in that: The device comprises: A first determination module, configured to obtain, based on a current rotation speed and a current torque of a motor in the electric drive system, a first water flow rate corresponding to the electric drive system when cooling is required; A second determination module, configured to obtain, based on a current temperature of at least one component in the electric drive system, a second water flow rate corresponding to the electric drive system when cooling is required; A transmission module is used to send a water flow request including a target water flow to a water pump, so that the water pump transmits the target water flow corresponding to the water flow request to the electric drive system, wherein the target water flow is the maximum value of the first water flow and the second water flow, and the target water flow is used to cool the electric drive system.

9. An electronic device, characterized in that: include: one or more processors; a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method according to any one of claims 1 to 7.

10. A vehicle, characterized in that: An electronic device comprising the electronic device described in claim 9.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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