Vehicle internal cooling system control method, control device, and storage medium

Abstract

The present application relates to a vehicle internal cooling system control method, a control device, and a storage medium. The method comprises: acquiring heat dissipation information and real-time state information; acquiring a first cooling system operation parameter on the basis of the heat dissipation information; on the basis of the real-time state information, determining whether a preset condition is met; and if the real-time state information meets the preset condition, acquiring a second cooling system operation parameter on the basis of the real-time state information, wherein a cooling system operates on the basis of the first cooling system operation parameter, and when the heat dissipation information meets the preset condition, the cooling system operates on the basis of the second cooling system operation parameter. The technical solution improves the overall performance and reliability of electric vehicles, and reduces unnecessary energy consumption while keeping the optimal operation state.

Description

Control method, control device and storage medium for vehicle interior cooling system

[0001] This application claims priority to Chinese patent application No. 202311797656.6, filed on December 22, 2023, with the invention name “Control method, control device and storage medium for vehicle internal cooling system”. The entire contents of the above Chinese patent application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of vehicle heat dissipation, and specifically provides a control method, a control device, and a storage medium for a vehicle internal cooling system. Background Art

[0003] In existing electric vehicle cooling system technologies, the usual control strategies are often too simple, mainly adjusting cooling parameters based on the vehicle's driving mode. This single control strategy based on driving mode cannot fully consider the vehicle's real-time heat dissipation needs and thermal load conditions.

[0004] Accordingly, the art requires a new cooling system control solution to solve the above problems.

[0005] Summary of the Invention

[0006] In order to overcome the above defects, the present application is proposed to provide a solution or at least partially solve the problems in the prior art.

[0007] In a first aspect, the present application provides a method for controlling a vehicle internal cooling system, the method comprising: obtaining heat dissipation information and real-time status information; obtaining first cooling system operating parameters based on the heat dissipation information; judging whether a preset condition is met based on the real-time status information; if the real-time status information meets the preset condition, obtaining second cooling system operating parameters based on the real-time status information, wherein the cooling system operates based on the first cooling system operating parameters until the heat dissipation information meets the preset condition, at which point the cooling system operates based on the second cooling system operating parameters.

[0008] In one technical solution of the above-mentioned method for controlling the vehicle interior cooling system, the preset conditions include a threshold corresponding to the real-time status information, wherein the threshold value is determined based on the vehicle driving mode.

[0009] In one technical solution of the control method of the above-mentioned vehicle internal cooling system, the cooling system includes an oil cooling circuit, a water cooling circuit and an air cooling system, the oil cooling circuit and the water cooling circuit generate heat exchange, and the water cooling circuit and the air cooling circuit generate heat exchange.

[0010] In a technical solution of the control method for the above-mentioned vehicle internal cooling system, it is characterized in that the oil cooling circuit includes an oil pump; the first cooling system operating parameter includes a first oil pump flow, the preset condition includes a first preset condition, and the method further includes: obtaining the first oil pump flow, the rotor temperature and the stator temperature; judging whether the rotor temperature and the stator temperature meet the first preset condition; if the rotor temperature and the stator temperature meet the first preset condition, then obtaining a second oil pump flow based on the rotor temperature and the stator temperature, wherein the oil pump operates based on the first oil pump flow until the rotor temperature and the stator temperature meet the first preset condition, at which time the oil pump operates based on the second oil pump flow.

[0011] In a technical solution of the control method for the above-mentioned vehicle internal cooling system, the water cooling circuit includes a water pump, the first cooling system operating parameter includes a first water pump flow, and the preset condition includes a second preset condition. The method also includes: obtaining the first water pump flow and the oil temperature in the oil cooling circuit; judging whether the oil temperature meets the second preset condition; if the oil temperature meets the second preset condition, obtaining the second water pump flow based on the first water pump flow and the oil temperature, wherein the water pump operates based on the first water pump flow until the oil temperature meets the second preset condition, at which time the water pump operates based on the second water pump flow.

[0012] In a technical solution of the control method for the above-mentioned vehicle internal cooling system, the air cooling system includes a fan, the first cooling system operating parameter includes a first fan speed, the preset condition includes a third preset condition, and the method further includes: obtaining the first fan speed and the water temperature in the water cooling circuit; judging whether the water temperature meets the third preset condition; if the water temperature meets the third preset condition, obtaining a second fan speed based on the water temperature and the first fan speed, wherein the fan operates based on the first fan speed until the water temperature meets the third preset condition, at which time the fan operates based on the second fan speed.

[0013] In one technical solution of the control method of the above-mentioned vehicle internal cooling system, the calculation method of the first oil pump flow includes: obtaining the water temperature, torque and speed in the water cooling circuit; inputting the oil temperature, water temperature, torque and speed into the fuzzy algorithm to obtain the first oil pump flow.

[0014] In one technical solution of the above-mentioned method for controlling the vehicle interior cooling system, the method for calculating the flow rate of the first water pump includes: obtaining the temperature of the IGBT module and the power of the converter in the motor controller;

[0015] Based on the water temperature, torque, and speed, the transient flow demand of the motor controller is obtained; based on the IGBT module temperature, converter power, and the transient flow demand in the motor controller, the first water pump flow is obtained, wherein the motor controller dissipates heat through a water cooling circuit.

[0016] In one technical solution of the above-mentioned control method of the vehicle internal cooling system, "obtaining a first fan speed" includes: obtaining motor loss and the ambient temperature of the vehicle; and obtaining the first fan speed based on the motor loss, water temperature and ambient temperature.

[0017] In a second aspect, a control device is provided, which includes a processor and a storage device, wherein the storage device is suitable for storing multiple computer programs, and the computer programs are suitable for being loaded and run by the processor to execute the vehicle interior cooling system control method described in any one of the technical solutions of the above-mentioned vehicle interior cooling system control method.

[0018] In a third aspect, a computer-readable storage medium is provided, which stores a plurality of computer programs, wherein the computer programs are suitable for being loaded and run by a processor to execute the vehicle interior cooling system control method described in any one of the technical solutions of the above-mentioned vehicle interior cooling system control method.

[0019] The above one or more technical solutions of this application have at least one or more of the following beneficial effects:

[0020] By collecting heat dissipation information and real-time status information, the technical solution implemented in this application enables dynamic adjustment of the operating parameters of the electric vehicle cooling system. This approach allows the cooling system to intelligently switch operating parameters, transitioning from a first cooling system parameter to a second cooling system parameter, based on the vehicle's real-time thermal load and operating status. This strategy significantly improves the adaptability and responsiveness of the cooling system, ensuring effective heat dissipation of the motor and key components under various driving conditions while optimizing energy efficiency. As a result, the overall performance and reliability of the electric vehicle are improved, while maintaining optimal operating conditions and reducing unnecessary energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The disclosure of this application will be more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the figures represent similar components, where:

[0022] FIG1 is a flow chart showing the main steps of a method for controlling a vehicle interior cooling system according to an embodiment of the present application;

[0023] FIG2 is a schematic diagram of a cooling system structure of a method for controlling a vehicle interior cooling system according to an embodiment of the present application;

[0024] FIG3 is a flow chart of a method for controlling a vehicle interior cooling system according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application.

[0026] In the description of this application, "module" and "processor" may include hardware, software, or a combination of both. A module may include hardware circuitry, various suitable sensors, communication ports, and memory. It may also include software components, such as computer programs, or a combination of software and hardware. A processor may be a central processing unit, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. A processor has data and / or signal processing capabilities. A processor may be implemented in software, hardware, or a combination of both. Non-transitory computer-readable storage media include any suitable medium capable of storing computer programs, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, and the like. The term "A and / or B" refers to all possible combinations of A and B, such as only A, only B, or both A and B. The terms "at least one of A or B" or "at least one of A and B" have similar meanings to "A and / or B" and may include only A, only B, or both A and B. The singular forms "one" and "the" may also include the plural forms.

[0027] In this embodiment of the present application, the cooling system includes an oil cooling circuit, a water cooling circuit, and an air cooling system. As shown in Figure 2, the oil cooling circuit and the water cooling circuit generate heat exchange, and the water cooling circuit and the air cooling circuit generate heat exchange. In this embodiment, heat exchange refers to heat exchange through contact. Within the vehicle, the water cooling circuit removes heat from the oil cooling circuit through heat exchange, and the air cooling circuit removes heat from the water cooling circuit through heat exchange.

[0028] Referring to FIG1 , FIG1 is a flow chart illustrating the main steps of a method for controlling a vehicle interior cooling system according to an embodiment of the present application. As shown in FIG1 , the method for controlling a vehicle interior cooling system in the embodiment of the present application mainly includes the following steps AD.

[0029] Step A: Obtain heat dissipation information and real-time status information.

[0030] In this embodiment, the heat dissipation information is used to generate the first cooling system operating parameters, and the real-time status information is used to judge the preset conditions, thereby determining whether to generate new second cooling system operating parameters.

[0031] In one embodiment, heat dissipation information includes: oil temperature in the oil cooling circuit, water temperature in the water cooling circuit, torque, speed, IGBT module temperature in the motor controller, converter power, motor losses, and vehicle ambient temperature. Real-time status information includes: rotor temperature, stator temperature, oil temperature, and water temperature.

[0032] In this embodiment, heat dissipation information is collected after the vehicle is in motion, while real-time status information is collected in real time. In this embodiment, preferably, initial water temperature information in the water cooling circuit is obtained when the vehicle is stationary after starting, and initial cooling system operating parameters are obtained based on the initial water temperature information, wherein the vehicle operates based on the initial cooling system operating parameters when stationary.

[0033] In this embodiment, the cooling system operating parameters include oil pump flow, water pump flow, and fan speed. Obtaining the initial cooling system operating parameters based on the initial water temperature information includes: obtaining the initial oil pump flow, initial water pump flow, and initial fan speed based on the initial water temperature information. In this embodiment, the initial cooling system can be obtained through a table lookup. For example, multiple initial cooling system operating parameters can be set corresponding to initial water temperature information within different intervals, and the interval within which the initial water temperature information is located can be determined to obtain specific initial cooling system operating parameters.

[0034] Step B: obtaining a first cooling system operating parameter based on the heat dissipation information.

[0035] In one embodiment, when the vehicle is moving, the first cooling system operating parameters are obtained based on the heat dissipation information. In this embodiment, the first cooling system operating parameters include: a first water pump flow rate, a first oil pump flow rate, and a first fan speed.

[0036] Step C: judging whether a preset condition is met based on the real-time status information.

[0037] In one embodiment, the preset conditions include a threshold corresponding to the real-time status information. Preferably, in one embodiment, the threshold is determined based on the vehicle's driving mode. That is, first, the vehicle's driving mode is obtained, and then the threshold corresponding to the real-time status information in the preset conditions is determined based on the driving mode.

[0038] Step D: If the real-time status information meets a preset condition, obtaining a second cooling system operating parameter based on the real-time status information.

[0039] In this embodiment, the cooling system operates based on the first cooling system operating parameters. When the heat dissipation information meets a preset condition, the cooling system operates based on the second cooling system operating parameters.

[0040] In one embodiment, once the real-time status information meets pre-set conditions, the cooling system will switch from a first cooling system operating parameter to a second cooling system operating parameter. This may include increasing the flow rate of the water pump and the oil pump and increasing the fan speed to cope with the increased heat load.

[0041] [Corrected 02.12.2024 according to Rule 91] In this embodiment, specifically, steps S101 to S303 are described in detail, as shown in FIG3 .

[0042] Step S101: Obtain the flow rate of the first oil pump.

[0043] In this embodiment, this step is a sub-step in step B, specifically obtaining the first oil pump flow rate in the first cooling system operating parameter in step B.

[0044] In this embodiment, the oil pump operates based on the first oil pump flow rate, and the first oil pump flow rate is obtained according to in-vehicle information.

[0045] In one embodiment, the first oil pump flow rate is obtained through steps S101-1 to S101-2. In this embodiment, the calculation method of the first oil pump flow rate is steps S101-1 to S101-2, which are specifically as follows:

[0046] Step S101 - 1 : Obtain the oil temperature in the oil cooling circuit, the water temperature in the water cooling circuit, the torque, and the rotational speed.

[0047] In this embodiment, this step is a sub-step of step A, specifically obtaining heat dissipation information in step A.

[0048] Step S101 - 1 : Input the oil temperature, water temperature, torque, and speed into a fuzzy algorithm to obtain a first oil pump flow rate.

[0049] In this embodiment, this step is a sub-step in step B, specifically obtaining the first oil pump flow rate in the first cooling system operating parameter in step B.

[0050] In one embodiment, the oil pump affects the heat dissipation efficiency of the oil cooling circuit for the motor, so it is very important to obtain the first oil pump flow rate based on the in-vehicle information.

[0051] In this embodiment, the first oil pump flow rate is estimated using a fuzzy algorithm. Fuzzy algorithms are used to address the limitations of traditional binary logic when solving practical engineering problems. Unlike traditional binary logic, fuzzy logic allows for the concept of partially true and partially false. This approach is particularly suitable for processing ambiguous or imprecise input data, producing an imprecise but usable result.

[0052] Oil and water temperature data provide direct information on the current status of the cooling system. Oil temperature reflects the thermal load on the motor and other key components, while water temperature indicates the cooling system's efficiency. Torque and speed reflect the motor's operating status. Torque indicates the load on the motor, while speed indicates its operating speed. These data are crucial for determining the motor's heat generation and cooling requirements.

[0053] In this implementation, the fuzzy algorithm processes input parameters by establishing fuzzy rules and membership functions. For example, for oil temperature, different membership levels can be assigned to different temperature ranges, such as "low," "medium," and "high." Using these membership levels and pre-set rules, the fuzzy algorithm outputs a fuzzified result, which is then defuzzified into a precise oil pump flow rate value.

[0054] In this embodiment, the obtained oil pump flow rate is a fixed value that ensures that the cooling requirements of the motor are met under most driving conditions and ambient temperatures, while also taking energy efficiency and overall system performance into consideration.

[0055] Step S102: Acquire the rotor temperature and the stator temperature.

[0056] In this embodiment, this step is a sub-step of step A, specifically obtaining real-time status information in step A.

[0057] In one embodiment, the rotor temperature and the stator temperature are obtained in order to subsequently refine the cooling system according to specific conditions.

[0058] In this embodiment, the source of rotor temperature is first explained. In this embodiment, since the rotor is the rotating part of the motor, directly measuring its temperature is difficult. Therefore, a model-based estimation method is typically used to determine the rotor temperature. This estimation is typically based on motor operating parameters such as current, voltage, speed, and load.

[0059] Preferably, in this embodiment, a thermal model algorithm is used to estimate the rotor temperature under specific conditions, combining the physical characteristics and operating state of the motor. Although this estimation method has a certain error, it is usually sufficient for control system decision-making.

[0060] Next, we'll explain the source of the stator temperature. In this embodiment, measuring stator temperature is relatively simple and can be achieved directly using an NTC thermistor installed near the stator. The resistance of an NTC thermistor decreases as temperature increases, providing a precise method for measuring temperature. The data provided by an NTC sensor is typically very accurate and can reflect the real-time temperature status of the stator.

[0061] In this implementation, by combining the estimated rotor temperature with the directly measured stator temperature, the overall thermal state of the motor can be comprehensively monitored. This dual monitoring approach improves the control system's understanding of the motor's thermal state, enabling more precise and efficient cooling strategies.

[0062] This comprehensive temperature monitoring approach is particularly important in complex driving situations, such as rapid acceleration or prolonged high-load operation, as it enables overheating issues to be detected promptly and the necessary cooling measures to be taken.

[0063] Step S103: Determine whether the rotor temperature and the stator temperature meet a first preset condition.

[0064] In this embodiment, this step is a sub-step in step C, specifically the part in step C regarding the oil cooling circuit.

[0065] In this embodiment, the first preset condition is a condition set to change the crude oil pump operation strategy. In this embodiment, the oil pump operates based on the previously obtained first oil pump flow until the rotor temperature and the stator temperature meet the first preset condition.

[0066] In one embodiment, if the rotor temperature and the stator temperature meet the first preset condition, it indicates that a special scenario has occurred. In order to meet the special scenario of the vehicle at this time, it is necessary to further change the control strategy of the oil pump to solve the current special scenario.

[0067] In this embodiment, the first preset condition is a series of thresholds set based on the temperatures of the rotor and stator. For example, the rotor temperature threshold is assumed to be 100°C. The stator temperature threshold is assumed to be 120°C. In this embodiment, the first preset condition includes three situations: the rotor temperature exceeds the threshold but the stator temperature does not exceed it; the stator temperature exceeds the threshold but the rotor temperature does not exceed it; and both the rotor and stator temperatures exceed the threshold. Detailed descriptions are given here:

[0068] Case 1: The rotor temperature exceeds the threshold, but the stator temperature does not.

[0069] In this case, the rotor temperature exceeded 100°C, but the stator temperature was below 120°C. This may mean that the rotor was under high load, while the stator cooling efficiency was acceptable.

[0070] Case 2: The stator temperature exceeds the threshold, but the rotor temperature does not.

[0071] In this case, the stator temperature exceeded 120° C., while the rotor temperature was below 100° C. This could indicate poor cooling of the stator area or a high load on the stator itself.

[0072] Case 3: Both the rotor and stator temperatures exceed the threshold.

[0073] This is the most severe case, where both the rotor and stator temperatures exceed their respective thresholds. This indicates that the entire motor may be experiencing extreme operating conditions and requires immediate cooling.

[0074] When one of the above three conditions is met, it is determined that the rotor temperature and the stator temperature meet the first preset condition. If neither the rotor temperature nor the stator temperature exceeds the threshold, it is determined that the rotor temperature and the stator temperature do not meet the first preset condition.

[0075] Step S104: If the rotor temperature and the stator temperature meet a first preset condition, a second oil pump flow rate is obtained based on the rotor temperature and the stator temperature.

[0076] In this embodiment, this step is a sub-step in step D, specifically obtaining the second oil pump flow rate in the second cooling system operating parameter in step D.

[0077] In this embodiment, the oil pump operates based on the first oil pump flow rate until the rotor temperature and the stator temperature meet a first preset condition, and then the oil pump operates based on the second oil pump flow rate.

[0078] In one embodiment, when the rotor or stator temperature exceeds a set threshold, it indicates that the motor requires more cooling. Therefore, the oil pump flow rate is increased accordingly to improve cooling efficiency. The second oil pump flow rate is determined based on the actual rotor and stator temperatures and preset conditions to ensure that the motor does not overheat under any circumstances.

[0079] In this embodiment, the oil pump operates according to the first oil pump flow rate until it detects that the temperatures of the rotor and stator meet the first preset condition. At this time, the control system immediately adjusts the oil pump to the second oil pump flow rate.

[0080] In this embodiment, the control system continuously monitors the rotor and stator temperatures to ensure that the second oil pump flow rate always meets the motor's real-time cooling needs. If the temperature drops below a threshold, the oil pump flow rate can be reduced or returned to the first oil pump flow rate to maintain energy efficiency and avoid unnecessary energy consumption.

[0081] The key to step S104 is flexible adjustment of the oil pump flow rate to ensure optimal motor cooling under varying operating conditions. This dynamic adjustment strategy not only improves motor efficiency but also helps extend its service life, while also ensuring the overall performance and reliability of the electric vehicle. This approach allows the cooling system to effectively handle a wide range of temperature conditions, ensuring optimal performance under varying environmental and load conditions.

[0082] It should be noted that the above description uses the oil cooling circuit to explain in detail the correspondence between sub-steps S101-S104 and steps AD. The following steps S201-S303 also have a correspondence with AD, which will not be repeated hereafter.

[0083] Step S201: Obtain the flow rate of the first water pump.

[0084] In this embodiment, the water pump operates based on the first water pump flow rate, and the first water pump flow rate is obtained according to in-vehicle information.

[0085] In one embodiment, the first water pump flow rate is obtained through steps S201-1 to S201-3. In this embodiment, the calculation method of the first water pump flow rate is steps S201-1 to S201-3, which are specifically as follows:

[0086] Step S201 - 1 : Obtain the IGBT module temperature and converter power in the motor controller.

[0087] In this embodiment, the water cooling circuit of the electric vehicle is responsible for dissipating heat to the motor controller, that is, the motor controller dissipates heat through the water cooling circuit.

[0088] In one embodiment, the motor controller is a key component of an electric vehicle, responsible for managing the operation of the motor. Among them, the insulated gate bipolar transistor (IGBT) is a key component of the motor controller, used to efficiently control the power output of the electric motor. IGBT modules generate heat during operation, so their temperature monitoring is crucial to prevent overheating. In this embodiment, the temperature of the IGBT module is measured using a thermistor or temperature sensor mounted close to the module. These sensors can provide real-time, accurate temperature readings to ensure that the IGBT module is within a safe operating temperature range.

[0089] In this embodiment, the converter controls energy conversion between the battery and the motor in an electric vehicle. Converter power reflects the system's current energy transfer efficiency and power level. Converter power can be obtained through the power monitoring system within the motor controller. This involves measuring the converter's input and output voltage and current to calculate power.

[0090] In this embodiment, the water cooling circuit is responsible for providing the necessary heat dissipation for the motor controller. By monitoring the temperature of the IGBT module and the power of the converter, the flow rate and temperature of the water cooling circuit can be adjusted to maximize heat dissipation efficiency.

[0091] Step S201 - 2 : Based on the water temperature, torque, and rotational speed, the transient flow demand of the motor controller is obtained.

[0092] In this embodiment, the focus is on estimating the transient flow demand of the motor controller through data analysis of water temperature, torque and speed.

[0093] In one embodiment, water temperature, torque, and speed are key parameters for determining the current operating state and thermal load of the motor controller. Water temperature provides the temperature of the cooling medium, while torque and speed reflect the load and operating speed of the motor controller. Transient flow demand refers to the immediate cooling flow required by the motor controller under specific operating conditions. This demand is determined by the heat generated by the motor controller and the amount of heat required to maintain it within a safe operating temperature range.

[0094] In this embodiment, by comprehensively analyzing the water temperature, torque, and speed data, the heat generated by the motor controller can be accurately estimated. Furthermore, the required transient flow rate can be calculated based on this heat and the cooling capacity of the water cooling system.

[0095] In this embodiment, the method for realizing transient flow demand estimation can apply thermodynamic models and real-time data analysis algorithms, which can process complex input data and output accurate flow adjustment instructions.

[0096] Step S201 - 3 : obtaining a first water pump flow rate based on the IGBT module temperature, converter power, and the transient flow rate demand in the motor controller.

[0097] In this embodiment, the first water pump flow rate is obtained through a fuzzy algorithm.

[0098] Step S202: Determine whether the oil temperature meets a second preset condition.

[0099] In this embodiment, the second preset condition is specifically designed to adjust the water pump operation strategy. This condition, based on a specific oil temperature threshold, determines whether the current cooling demand exceeds the normal range. Because one of the key tasks of a water cooling circuit is to cool the oil cooling circuit, excessively high oil cooling circuit temperatures can affect the motor's heat dissipation, potentially leading to failures or other abnormalities.

[0100] In one embodiment, for example, the second preset condition includes an oil temperature threshold, where the second preset condition is that the oil temperature is greater than the oil temperature threshold. For example, the oil temperature threshold can be set to 90°C. When the oil temperature reaches or exceeds this threshold, it may indicate that the cooling system is experiencing a high heat load and requires stronger cooling. When the oil temperature reaches or exceeds the set threshold of 90°C, the system deems the second preset condition satisfied. This means that the current flow rate of the water pump may not be sufficient to effectively cool the motor controller and needs to be adjusted.

[0101] In this embodiment, once the oil temperature reaches a threshold, meaning it meets the second pre-set condition, conventional cooling strategies may no longer be effective, and more proactive measures are needed to ensure safe operation of the motor controller. Based on the actual oil temperature reading, the system adjusts the water pump flow rate. If the oil temperature is above the threshold, the flow rate is increased to enhance cooling. If the oil temperature is below the threshold, the flow rate is maintained or reduced as appropriate based on actual conditions.

[0102] Step S203: If the oil temperature satisfies a second preset condition, a second water pump flow rate is obtained based on the first water pump flow rate and the oil temperature.

[0103] In this embodiment, the water pump operates based on the first water pump flow rate until the oil temperature meets a second preset condition, and then the water pump operates based on the second water pump flow rate.

[0104] In one embodiment, once the oil temperature reaches the threshold of the second preset condition, this typically indicates that the cooling system requires increased cooling capacity to handle the increased heat load. In this case, the original first water pump flow rate may no longer be sufficient. The second water pump flow rate is calculated based on the current oil temperature and the set first water pump flow rate. By analyzing these two parameters, a higher flow rate requirement can be estimated to provide sufficient cooling.

[0105] In this embodiment, when the oil temperature reaches or exceeds a threshold, the water pump switches from the first flow rate mode to the second flow rate mode. This switching is dynamic, responding to real-time cooling needs. When increasing the water pump flow rate, the overall system efficiency must also be considered. The goal is to ensure adequate cooling while avoiding unnecessary energy waste.

[0106] In this step, by flexibly adjusting the water pump flow rate, it is ensured that the motor controller can obtain more effective cooling when the oil temperature reaches the second preset condition.

[0107] Step S301: Obtain a first fan speed.

[0108] In this embodiment, the fan operates based on the first fan flow rate, and the first fan flow rate is obtained according to in-vehicle information.

[0109] In one embodiment, the first fan flow rate is obtained through steps S301-1 to S301-2. In this embodiment, the calculation method of the first fan flow rate is steps S301-1 to S301-2, which are specifically as follows:

[0110] Step S301 - 1 : Obtain motor loss and vehicle ambient temperature.

[0111] In this embodiment, motor loss primarily refers to the heat generated during motor operation. This loss typically consists of copper loss due to internal resistance and iron loss due to magnetic field variations. This loss, expressed as heat energy, has a direct impact on the motor's temperature and performance. This heat is also removed by oil and water cooling, and is also the final step in air cooling.

[0112] In one embodiment, motor losses are typically estimated based on motor parameters such as current, voltage, and speed. These parameters can be acquired via sensors in the motor controller. Combined with the motor's characteristics and operating conditions, a thermal model or energy balance equation can be used to estimate the total heat loss of the motor.

[0113] In this embodiment, the air cooling system removes heat through air flow, a process significantly affected by the ambient air temperature. When the ambient temperature is low, heat dissipation efficiency is high because cool air has a greater ability to absorb heat. Conversely, when the ambient temperature is high, the air already carries a large amount of heat, and its heat absorption capacity is weakened, thereby reducing heat dissipation efficiency. In hot environments, the fan needs to run at a higher speed to compensate for the reduced heat dissipation efficiency. In cold environments, the same heat dissipation effect can be achieved at a lower fan speed.

[0114] In this embodiment, the ambient air temperature is continuously monitored by temperature sensors outside the vehicle. The data from these sensors is crucial for adjusting the operation of the fan because they provide real-time information about external cooling conditions.

[0115] Step S301 - 2 : obtaining a first fan speed based on the motor loss, water temperature, and ambient temperature.

[0116] In this embodiment, based on the motor loss, water temperature and ambient temperature data, a fuzzy algorithm is used to calculate the optimal first speed of the electric vehicle fan.

[0117] In one embodiment, by comprehensively considering motor losses, water temperature, and ambient temperature (which affects heat dissipation efficiency), a fuzzy algorithm can generate a comprehensive assessment to determine the appropriate fan speed.

[0118] Step S302: Determine whether the water temperature meets a third preset condition.

[0119] In one embodiment, the third preset condition is based on a specific water temperature threshold, for example, the threshold may be set to 80° C. When the water temperature exceeds the threshold, it indicates that the heat dissipation capacity of the water cooling circuit may be insufficient to cope with the current heat load.

[0120] In this embodiment, the air cooling system primarily assists the water cooling system, particularly under high heat load conditions. By increasing air flow and dissipating surface area, the air cooling system improves the overall system's heat dissipation efficiency. In this embodiment, the control system continuously compares real-time water temperature data with a preset threshold. Once the water temperature exceeds the threshold, the third preset condition is considered met, and the fan speed is adjusted.

[0121] In this embodiment, if the water temperature exceeds a preset threshold, the first fan speed may no longer be sufficient to provide the necessary heat dissipation. Therefore, the system calculates and sets a new fan speed—the second fan speed. This second fan speed is determined based on the current water temperature and the original fan speed. The goal is to compensate for the insufficient heat dissipation of the water cooling system by increasing the fan speed, thereby effectively lowering the water temperature.

[0122] This step ensures that the air cooling system can promptly intervene to provide necessary heat dissipation support when the water cooling system faces high heat loads. This dynamic adjustment mechanism based on water temperature thresholds ensures the effective operation of the entire cooling system under various operating conditions, thereby maintaining the optimal working condition of the electric vehicle motor controller and other key components.

[0123] Step S303: If the water temperature satisfies a third preset condition, a second fan speed is obtained based on the water temperature and the first fan speed.

[0124] In this embodiment, the fan operates based on the first fan speed until the water temperature meets a third preset condition, and then the fan operates based on the second fan speed.

[0125] In one embodiment, when the water temperature reaches or exceeds the threshold of the third preset condition, this generally means that the heat dissipation capacity of the water cooling system needs to be enhanced by increasing the fan speed. In this embodiment, the calculation of the second fan speed depends on the real-time monitored water temperature and the first fan speed.

[0126] In this embodiment, when calculating the second fan speed, the specific value of the water temperature and its impact on the heat dissipation requirement must be taken into account. The higher the water temperature, the faster the fan speed is required to provide a stronger cooling effect.

[0127] In this embodiment, the fan operates at the first fan speed until the water temperature meets the third preset condition, at which point the fan operates at the second fan speed. The above strategy can fully address scenarios where the water temperature is too high.

[0128] It should be noted that, preferably, in this embodiment, the first preset condition, the second preset condition, and the third preset condition are all related to the vehicle driving mode. This is because the user's needs vary with different vehicle driving modes. For example, users corresponding to sports mode want the vehicle to have more aggressive heat dissipation because this can better ensure vehicle performance. Therefore, the threshold value set in the preset condition is relatively low. In contrast, for example, energy-saving mode pays more attention to energy consumption, and aggressive heat dissipation will inevitably increase the system's energy consumption. Therefore, in this embodiment, the threshold value of the preset condition in energy-saving mode is lower than the threshold value in sports mode.

[0129] It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effect of the present application, different steps do not have to be performed in such an order. They can be performed simultaneously (in parallel) or in other orders. These changes are within the scope of protection of the present application.

[0130] It will be understood by those skilled in the art that all or part of the processes in the method for implementing the above embodiment of the present application can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, it can implement the steps of each of the above method embodiments. The computer program includes a computer program, and the computer program can be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium that can carry the computer program. It should be noted that the content contained in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media do not include electric carrier signals and telecommunication signals.

[0131] Furthermore, the present application also provides a control device. In one embodiment of a control device according to the present application, the control device includes a processor and a storage device. The storage device can be configured to store a program for executing the vehicle interior cooling system control method of the above-mentioned method embodiment, and the processor can be configured to execute the program in the storage device, which includes but is not limited to a program for executing the vehicle interior cooling system control method of the above-mentioned method embodiment. For ease of explanation, only the parts related to the embodiment of the present application are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present application. The control device can be a control device device formed by various electronic devices.

[0132] Furthermore, it should be understood that since the configuration of each module is merely for the purpose of illustrating the functional units of the apparatus of the present application, the physical devices corresponding to these modules may be the processor itself, or a portion of the software in the processor, a portion of the hardware, or a combination of software and hardware. Therefore, the number of modules in the figure is merely illustrative.

[0133] Those skilled in the art will appreciate that the various modules in the device can be adaptively split or merged. Such splitting or merging of specific modules will not cause the technical solution to deviate from the principles of this application. Therefore, the technical solutions after splitting or merging will fall within the scope of protection of this application.

[0134] The relevant user personal information that may be involved in the various embodiments of this application is strictly in accordance with the requirements of laws and regulations, following the principles of legality, legitimacy and necessity, and based on the reasonable purposes of business scenarios, to process the personal information that users actively provide during the use of products / services or generated due to the use of products / services, as well as the personal information obtained with the user's authorization.

[0135] The personal information processed by the Applicant will vary depending on the specific product / service scenario and will be based on the specific scenario in which the user uses the product / service. This may involve the user's account information, device information, driving information, vehicle information, or other related information. The Applicant will treat the user's personal information and its processing with a high degree of diligence.

[0136] The Applicant attaches great importance to the security of user personal information and has taken reasonable and feasible security measures that comply with industry standards to protect user information and prevent personal information from being accessed, disclosed, used, modified, damaged or lost without authorization.

[0137] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A method for controlling a vehicle interior cooling system, characterized in that: The method comprises: Get heat dissipation information and real-time status information; Based on the heat dissipation information, obtaining a first cooling system operating parameter; Determining whether a preset condition is met based on the real-time status information; If the real-time status information meets the preset conditions, the second cooling system operating parameters are obtained based on the real-time status information, wherein the cooling system operates based on the first cooling system operating parameters, until the heat dissipation information meets the preset conditions, and the cooling system operates based on the second cooling system operating parameters.

2. The control method of the vehicle interior cooling system according to claim 1, characterized in that: The preset conditions include a threshold corresponding to the real-time status information, wherein the threshold value is determined based on the vehicle driving mode.

3. The control method of the vehicle interior cooling system according to claim 1, characterized in that: The cooling system includes an oil cooling circuit, a water cooling circuit and an air cooling system. The oil cooling circuit generates heat exchange with the water cooling circuit, and the water cooling circuit generates heat exchange with the air cooling circuit.

4. The control method of the vehicle interior cooling system according to claim 3, characterized in that: The oil cooling circuit includes an oil pump; the first cooling system operating parameter includes a first oil pump flow rate; the preset condition includes a first preset condition; and the method further includes: Obtaining the flow rate, rotor temperature, and stator temperature of the first oil pump; Determining whether the rotor temperature and the stator temperature meet a first preset condition; If the rotor temperature and the stator temperature meet the first preset condition, a second oil pump flow is obtained based on the rotor temperature and the stator temperature, wherein the oil pump operates based on the first oil pump flow until the rotor temperature and the stator temperature meet the first preset condition, at which time the oil pump operates based on the second oil pump flow.

5. The control method of the vehicle interior cooling system according to claim 3, characterized in that: The water cooling circuit includes a water pump, the first cooling system operating parameter includes a first water pump flow rate, the preset condition includes a second preset condition, and the method further includes: Obtaining the flow rate of the first water pump and the oil temperature in the oil cooling circuit; Determining whether the oil temperature meets a second preset condition; If the oil temperature meets the second preset condition, a second water pump flow is obtained based on the first water pump flow and the oil temperature, wherein the water pump operates based on the first water pump flow until the oil temperature meets the second preset condition, at which time the water pump operates based on the second water pump flow.

6. The control method of the vehicle interior cooling system according to claim 3, characterized in that: The air cooling system includes a fan, the first cooling system operating parameter includes a first fan speed, the preset condition includes a third preset condition, and the method further includes: Obtaining a first fan speed and a water temperature in a water cooling circuit; Determining whether the water temperature meets a third preset condition; If the water temperature meets the third preset condition, a second fan speed is obtained based on the water temperature and the first fan speed, wherein the fan runs based on the first fan speed until the water temperature meets the third preset condition, at which time the fan runs based on the second fan speed.

7. The control method of the vehicle interior cooling system according to claim 4, characterized in that: The calculation method of the first oil pump flow rate includes: Obtain water temperature, torque and speed in the water cooling circuit; obtaining the oil temperature in the oil cooling circuit; The oil temperature, water temperature, torque and rotation speed are input into a fuzzy algorithm to obtain a first oil pump flow rate.

8. The control method of the vehicle interior cooling system according to claim 5, characterized in that: The calculation method of the first water pump flow includes: Get the IGBT module temperature and converter power in the motor controller; Obtaining the water temperature in the water cooling circuit; Based on the water temperature, torque, and speed, a transient flow demand of a motor controller is obtained; Based on the IGBT module temperature, the converter power and the transient flow demand in the motor controller, a first water pump flow is obtained, wherein the motor controller dissipates heat through a water cooling circuit.

9. The control method of the vehicle interior cooling system according to claim 6, characterized in that: "Get the first fan speed", including: Obtain motor loss and vehicle ambient temperature; A first fan speed is obtained based on the motor loss, water temperature and ambient temperature.

10. A control device, comprising a processor and a storage device, wherein the storage device is suitable for storing a plurality of computer programs, characterized in that: The computer program is suitable for being loaded and run by the processor to execute the control method of the vehicle interior cooling system according to any one of claims 1 to 9.

11. A computer-readable storage medium storing a plurality of computer programs, characterized in that: The computer program is suitable for being loaded and run by a processor to execute the control method of the vehicle interior cooling system according to any one of claims 1 to 9.

Images