A high-speed driving thermal management control method and device for an electric vehicle and a medium

Abstract

The application discloses a kind of electric vehicle high-speed travel heat management control method, device and medium, the method includes: based on the vehicle state data of electric vehicle, under the condition that electric vehicle is in the high-speed travel state of pre-set, if the temperature of several target components in electric vehicle exceeds preset value, then through the heat dissipation system component of vehicle heat management controller is closed to electric vehicle, and through air conditioning controller limit electric vehicle heat management system power, to reduce the power loss of electric vehicle.The application proposes a kind of electric vehicle high-speed travel heat management control method, device and medium, by accurately controlling the operation of heat management system and heat dissipation system component, can improve the energy utilization efficiency of electric vehicle, close unnecessary heat dissipation component and limit heat management system power, can reduce energy waste, make electric vehicle more energy-saving in high-speed travel state, can solve the problem that electric vehicle power loss is difficult to reduce by effective vehicle heat management.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle technology, and in particular to a method, device and medium for thermal management control of electric vehicles at high speeds. Background Technology

[0002] Electric vehicles, as a clean and efficient mode of transportation, are gradually becoming the mainstream in the market. However, due to issues such as natural battery wear and tear, motor and electronic equipment wear and tear, charging equipment wear and tear, battery temperature fluctuations, and battery aging, effectively reducing energy loss and extending the driving range of electric vehicles has become a major concern for users. Currently, methods such as maintaining proper tire pressure, regularly maintaining vehicle components, driving smoothly and avoiding sudden acceleration, and maintaining appropriate speeds are mainly used to reduce energy loss and improve energy efficiency.

[0003] For electric vehicles, battery performance and lifespan are closely related to temperature. High temperatures accelerate battery aging, while low temperatures affect battery range and charging / discharging efficiency. Therefore, effective thermal management is crucial for reducing energy loss, improving battery performance, and extending battery life. However, current technologies have not adequately considered vehicle thermal management during high-speed driving, making it difficult to effectively reduce energy loss in electric vehicles. Summary of the Invention

[0004] This invention provides a method, device, and medium for thermal management control of electric vehicles at high speeds, in order to solve the problem of difficulty in reducing the energy loss of electric vehicles through effective vehicle thermal management.

[0005] Obtain vehicle status data for electric vehicles;

[0006] Based on the vehicle status data, if the temperature of several target components in the electric vehicle exceeds a preset value when the electric vehicle is in a preset high-speed driving state, the vehicle thermal management controller will shut down the cooling system components of the electric vehicle, and the air conditioning controller will limit the power of the electric vehicle's thermal management system to reduce the electric vehicle's energy consumption.

[0007] In this invention, because electric vehicles need to overcome greater air resistance and rolling resistance when traveling at high speeds, their energy consumption is typically higher. By determining whether an electric vehicle is traveling at high speed, more targeted energy-saving measures can be taken. Specifically, adjustments to the thermal management system and cooling system components can be made only when the electric vehicle is traveling at high speeds, avoiding unnecessary increases in energy consumption. When an electric vehicle is traveling at high speeds and the temperature of target components is too high, the cooling system components may over-operate, consuming a large amount of electrical energy. By shutting down these components through the vehicle's thermal management controller, unnecessary energy consumption can be significantly reduced. Simultaneously, the operation of the air conditioning system also increases the electric vehicle's energy loss. When traveling at high speeds and needing to reduce energy consumption, limiting the power of the thermal management system through the air conditioning controller can reduce the energy consumption of the air conditioning system, thereby further reducing the overall energy consumption of the electric vehicle.

[0008] Compared to existing technologies, this invention can improve the energy efficiency of electric vehicles by precisely controlling the operation of the thermal management system and heat dissipation system components. By shutting down unnecessary heat dissipation components and limiting the power of the thermal management system, energy waste can be reduced, making electric vehicles more energy-efficient at high speeds. Therefore, it can solve the problem of reducing the power loss of electric vehicles through effective whole-vehicle thermal management.

[0009] As a preferred embodiment, if the temperature of several target components in the electric vehicle exceeds a preset value, the vehicle's heat dissipation system components are shut down by the vehicle thermal management controller, and the power of the electric vehicle's thermal management system is limited by the air conditioning controller, in order to reduce the electric vehicle's energy consumption. Specifically:

[0010] If the temperature of the target components in the electric vehicle exceeds a preset value, the vehicle thermal management controller will shut down the grille and electric fan of the electric vehicle, and the air conditioning controller will limit the power of the compressor and PTC heater of the electric vehicle to reduce the power consumption of the electric vehicle.

[0011] The target components include a battery, a motor, a motor controller, and a charging and power distribution system.

[0012] In this preferred embodiment, when the temperature of key components of an electric vehicle, such as the battery, motor, motor controller, and charging and distribution system, is too high, the vehicle thermal management controller can promptly shut down the grille and electric fan, as well as limit the power of the compressor and PTC heater. This can effectively reduce the temperature of these components and prevent performance degradation, damage, or even safety accidents caused by overheating.

[0013] As a preferred embodiment, the vehicle's grille and electric fan are shut down via the vehicle thermal management controller, specifically:

[0014] If the temperature of the target components does not exceed the corresponding preset value, then the vehicle thermal management controller will shut down all grilles and electric fans of the electric vehicle.

[0015] If the temperature of any of the target components exceeds the corresponding preset value, the current opening state of the grille and the current state of the electric fan in the electric vehicle shall be maintained.

[0016] In this preferred embodiment, when the temperature of the target components does not exceed the preset value, closing all grilles and electric fans of the electric vehicle can reduce unnecessary energy consumption. Closing the grilles helps reduce wind resistance, thereby lowering energy consumption during operation, and closing the electric fans also prevents energy consumption due to excessive heat dissipation. Conversely, when the temperature of the target components exceeds the preset value, maintaining the current state of the grilles and electric fans ensures that the electric vehicle's thermal management system can effectively dissipate heat, preventing components from overheating and thus protecting the electric vehicle's performance and safety.

[0017] As a preferred embodiment, the power of the electric vehicle's compressor and PTC heater is limited by the air conditioning controller, specifically as follows:

[0018] The ambient temperature of the electric vehicle is obtained from the vehicle status data;

[0019] If the ambient temperature is within a preset range and the defrosting and defogging function of the electric vehicle is not activated, the power of the compressor and the power of the PTC heater will be limited to a preset maximum value by the air conditioning controller according to the ambient temperature.

[0020] If the ambient temperature is not within the preset range, the power of the compressor and the power of the PTC heater are not limited.

[0021] This preferred solution, when the defrosting and defogging functions of the electric vehicle are not activated, limits the power of the compressor and PTC heater according to the ambient temperature, which can significantly optimize energy consumption. Furthermore, this control strategy can intelligently adapt to changes in ambient temperature. When the ambient temperature exceeds the preset range, it does not limit the power of the compressor and PTC heater, ensuring that the vehicle can cope with extreme weather conditions, such as severe cold or extreme heat. This intelligent adaptability helps to improve the reliability and stability of the vehicle.

[0022] As a preferred embodiment, when the electric vehicle is in a preset high-speed driving state, specifically:

[0023] The vehicle speed of the electric vehicle is obtained from the vehicle status data. If the vehicle speed is greater than a preset value and continues for more than a preset time, then the electric vehicle is in the high-speed driving state.

[0024] In this preferred solution, the energy consumption of electric vehicles is relatively high when driving at high speeds. By determining whether an electric vehicle is driving at high speeds, energy consumption can be managed more accurately, avoiding unnecessary energy waste.

[0025] This application also provides a thermal management control device for electric vehicles at high speeds, including a data module and a control module;

[0026] The data module is used to acquire vehicle status data of the electric vehicle.

[0027] The control module is used to reduce the power consumption of the electric vehicle by shutting down the cooling system components of the electric vehicle through the vehicle thermal management controller and limiting the power of the electric vehicle thermal management system through the air conditioning controller, based on the vehicle status data and when the electric vehicle is in a preset high-speed driving state.

[0028] As a preferred embodiment, the control module includes a control unit;

[0029] The control unit is used to reduce the power consumption of the electric vehicle by closing the grille and electric fan of the electric vehicle through the vehicle thermal management controller and limiting the compressor power and PTC heater power of the electric vehicle through the air conditioning controller if the temperature of the several target components in the electric vehicle exceeds a preset value.

[0030] The target components include a battery, a motor, a motor controller, and a charging and power distribution system.

[0031] As a preferred embodiment, the control unit includes a shutdown subunit and a holding subunit;

[0032] The shut-off subunit is used to shut down all grilles and electric fans of the electric vehicle through the vehicle thermal management controller if the temperatures of the plurality of target components do not exceed the corresponding preset values.

[0033] The holding subunit is used to maintain the current opening state of the grille and the current state of the electric fan in the electric vehicle if any temperature of any of the plurality of target components exceeds the corresponding preset value.

[0034] As a preferred embodiment, the control unit includes a temperature subunit, a limiting subunit, and a maintaining subunit;

[0035] The temperature subunit is used to obtain the ambient temperature of the electric vehicle from the vehicle status data.

[0036] The limiting subunit is used to limit the power of the compressor and the power of the PTC heater to a preset maximum value according to the ambient temperature if the ambient temperature is within a preset range when the defrosting and defogging function of the electric vehicle is not turned on.

[0037] The maintenance subunit is configured to not limit the power of the compressor and the power of the PTC heater if the ambient temperature is not within the preset range.

[0038] As a preferred embodiment, when the electric vehicle is in a preset high-speed driving state, specifically:

[0039] The vehicle speed of the electric vehicle is obtained from the vehicle status data. If the vehicle speed is greater than a preset value and continues for more than a preset time, then the electric vehicle is in the high-speed driving state.

[0040] This application also provides a storage medium storing a computer program, which is called and executed by a computer to implement the above-described method for thermal management control of electric vehicles at high speeds. Attached Figure Description

[0041] Figure 1 This is a schematic flowchart of a thermal management control method for electric vehicles at high speeds, provided in an embodiment of this application.

[0042] Figure 2 This is a control flowchart provided in an embodiment of this application;

[0043] Figure 3 This is a comparison chart of the battery life attenuation rate distribution provided in the embodiments of this application;

[0044] Figure 4 This is a schematic diagram of the structure of a thermal management control device for high-speed driving of an electric vehicle provided in an embodiment of this application. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] In the description of this application, unless otherwise stated, "a number" means two or more.

[0047] The electric vehicle high-speed driving thermal management control method provided in this application embodiment is mainly applied to situations where it is necessary to optimize the control strategy for user-specific scenarios while ensuring that the power battery and other automotive components operate within a reasonable temperature range, so as to reduce the high-speed range degradation of electric vehicles.

[0048] Example 1:

[0049] Please see Figure 1 The embodiments of this application provide a thermal management control method for electric vehicles at high speeds, including S1 to S2, and the specific implementation steps are as follows:

[0050] S1. Obtain vehicle status data of the electric vehicle.

[0051] Step S1 in this embodiment of the application is specifically as follows:

[0052] The vehicle control unit (VCU) monitors the vehicle speed signal and operating status of the electric vehicle in real time to obtain vehicle status data.

[0053] S2. Based on vehicle status data, if the temperature of several target components in the electric vehicle exceeds a preset value when the electric vehicle is in a preset high-speed driving state, the vehicle thermal management controller will shut down the cooling system components of the electric vehicle and the air conditioning controller will limit the power of the electric vehicle's thermal management system to reduce the electric vehicle's energy consumption.

[0054] Step S2 in this embodiment includes S2.1 to S2.4, specifically as follows:

[0055] S2.1 Obtain the vehicle speed from the vehicle status data. If the speed is greater than a preset value (e.g., 90km / h) and continues for more than a preset time (e.g., 10 minutes), the electric vehicle is in a high-speed driving state.

[0056] In this embodiment S2.1, the energy consumption of electric vehicles is relatively high when driving at high speed. By determining whether the electric vehicle is driving at high speed, energy consumption can be managed more accurately and unnecessary energy waste can be avoided.

[0057] S2.2 When the electric vehicle is traveling at high speed, the Temperature Management Module for Entire Vehicle (TMM) determines whether the temperature of several target components in the electric vehicle exceeds the corresponding preset value; among them, the several target components include the battery, motor, motor controller and charging and distribution system.

[0058] If the temperature of several target components does not exceed the corresponding preset value, the vehicle thermal management controller will shut down all grilles and electric fans of the electric vehicle to reduce the electric energy consumption of the electric vehicle.

[0059] If the temperature of any of the target components exceeds the corresponding preset value, the current opening state of the grille and the current state of the electric fan in the electric vehicle will be maintained.

[0060] It should be noted that the above active grille control strategy is on / off control, but it can also be a more complex control strategy, such as neural network control, with the aim of finding the optimal opening degree of the grille.

[0061] In this embodiment S2.2, when the temperature of the target components does not exceed the preset value, closing all the grilles and electric fans of the electric vehicle can reduce unnecessary energy consumption. Closing the grilles helps reduce wind resistance, thereby reducing the energy consumption of the electric vehicle during operation, and closing the electric fans also avoids energy consumption caused by excessive heat dissipation. However, when the temperature of the target components exceeds the preset value, maintaining the current state of the grilles and electric fans ensures that the electric vehicle's thermal management system can effectively dissipate heat, preventing components from overheating, thereby protecting the performance and safety of the electric vehicle.

[0062] Furthermore, by judging whether the temperature of several target components exceeds the limit, the system decides whether to close the grille or maintain its current opening. The aim is to close as many grilles as possible to reduce high-speed wind resistance, thereby reducing the energy consumption required to overcome this resistance. Generally, at high speeds, the airflow through the radiator is high enough to meet the radiator's cooling needs, and the fan can be turned off while driving.

[0063] S2.3 Obtain the ambient temperature of the electric vehicle from the vehicle status data;

[0064] When the defrost and defog functions of the electric vehicle are not turned on, if the ambient temperature is within the preset range, the power of the compressor will be limited to the preset maximum value by the air-conditioner controller (AC) to reduce the power consumption of the electric vehicle. If the ambient temperature is not within the preset range, the power of the compressor will not be limited.

[0065] Taking a certain A-class sedan as an example, the maximum power of the electric air conditioning compressor is 3500W. Under high-speed driving conditions, the air conditioning controller sets different power limits for the air conditioning compressor based on the ambient temperature, as follows:

[0066] ① When the ambient temperature is <0℃, the compressor power is not limited;

[0067] ② When the ambient temperature is ≥0℃ and <5℃, the maximum power limit of the compressor is set to 2500W;

[0068] ③ When the ambient temperature is ≥5℃ and <20℃, the maximum power limit of the compressor is set to 1500W;

[0069] ④ When the ambient temperature is ≥20℃ and <30℃, the maximum power limit of the compressor is set to 1000W;

[0070] ⑤ When the ambient temperature is ≥30℃ and <35℃, the maximum power limit of the compressor is set to 1500W;

[0071] ⑥ When the ambient temperature is ≥35℃ and <40℃, the maximum power limit of the compressor is set to 2500W;

[0072] ⑦ When the ambient temperature is ≥40℃, the compressor power is not limited.

[0073] S2.4 When the defrosting and defogging functions of the electric vehicle are not turned on, if the ambient temperature is within the preset range, the power of the PTC (Positive Temperature Coefficient) heater will be limited to the preset maximum value by the air conditioning controller according to the ambient temperature, so as to reduce the power consumption of the electric vehicle; if the ambient temperature is not within the preset range, the power of the PTC heater will not be limited.

[0074] Taking a certain Class A sedan as an example, the maximum power of the PTC heater is 5000W. Under high-speed driving conditions, the air conditioning controller sets different power limits for the PTC heater based on the ambient temperature, as follows:

[0075] ① When the ambient temperature is < -10℃, the PTC power is not limited;

[0076] ② When the ambient temperature is ≥-10℃ and <0℃, the maximum power limit of the PTC is set to 3500W;

[0077] ③ When the ambient temperature is ≥0℃ and <5℃, the maximum power limit of the PTC is set to 2500W;

[0078] ④ When the ambient temperature is ≥5℃ and <15℃, the maximum power limit of the PTC is set to 2000W;

[0079] ⑤ When the ambient temperature is ≥15℃ and <25℃, the maximum power limit of the PTC is set to 1500W;

[0080] ⑥ When the ambient temperature is ≥25℃, the maximum power limit of the PTC is set to 1000W.

[0081] For examples of this application, please refer to [link / reference]. Figure 2 , Figure 2This is a control flowchart provided in an embodiment of the present application, illustrating the general process of reducing the energy loss of electric vehicles by controlling the power of the grille, electric fan, compressor, and PTC heater to perform overall vehicle thermal management.

[0082] For examples of this application, please refer to [link / reference]. Figure 3 , Figure 3 This is a comparison diagram of the range degradation rate distribution provided in the embodiments of this application, showing the range degradation rate distribution before and after optimizing the thermal management control strategy for electric vehicles;

[0083] Figure 3 Taking a Class A sedan as an example, this study analyzed the range degradation rate distribution of 1920 vehicles before and after thermal management control strategy optimization under high-speed conditions (vehicle speed ≥ 90 km / h). After thermal management control strategy optimization, nearly 70% of users experienced a 5% to 7% reduction in range degradation rate, while 30% of users experienced an increase in range degradation rate, possibly related to aggressive driving and ultra-high-speed (> 120 km / h) driving.

[0084] In this embodiment, S2.3 and S2.4 limit the power of the compressor and PTC heater according to the ambient temperature when the defrosting and defogging functions of the electric vehicle are not turned on, which can significantly optimize energy consumption. Furthermore, this control strategy can intelligently adapt to changes in ambient temperature. When the ambient temperature exceeds the preset range, the power of the compressor and PTC heater is not limited to ensure that the vehicle can cope with extreme weather conditions, such as severe cold or extreme heat. This intelligent adaptability helps to improve the reliability and stability of the vehicle.

[0085] In this embodiment S2, when the temperature of key components of the electric vehicle, such as the battery, motor, motor controller, and charging and distribution system, is too high, the vehicle thermal management controller can promptly shut down the grille and electric fan, as well as limit the power of the compressor and the PTC heater. This can effectively reduce the temperature of these components and prevent performance degradation, damage, or even safety accidents caused by overheating.

[0086] Overall, this application has the following beneficial effects:

[0087] Electric vehicles typically consume more energy at high speeds due to the increased air and rolling resistance they face. By determining when an electric vehicle is traveling at high speeds, more targeted energy-saving measures can be implemented. This means adjusting the thermal management and cooling system components only when the vehicle is traveling at high speeds, thus avoiding unnecessary energy increases. When an electric vehicle is traveling at high speeds and the temperature of target components is too high, the cooling system components may overheat and consume a large amount of electricity. Shutting down these components by controlling the vehicle's thermal management controller can significantly reduce unnecessary energy consumption. Simultaneously, the operation of the air conditioning system also increases the energy loss of the electric vehicle. When traveling at high speeds and needing to reduce energy consumption, limiting the power of the thermal management system by the air conditioning controller can reduce the energy consumption of the air conditioning system, thereby further reducing the overall energy consumption of the electric vehicle.

[0088] This application is based on the actual driving scenarios of users and optimizes the thermal management control logic. While ensuring that the power battery and other automotive components operate within a reasonable temperature range, it reduces high-speed range degradation and alleviates users' range anxiety.

[0089] Example 2:

[0090] Please see Figure 4 The embodiments of this application provide a thermal management control device for high-speed driving of an electric vehicle, including a data module 10 and a control module 20;

[0091] Among them, data module 10 is used to acquire vehicle status data of electric vehicles;

[0092] The control module 20 is used to reduce the electric energy loss of the electric vehicle by shutting down the heat dissipation system components of the electric vehicle through the vehicle thermal management controller and limiting the power of the electric vehicle thermal management system through the air conditioning controller, when the electric vehicle is in a preset high-speed driving state and the temperature of several target components in the electric vehicle exceeds the preset value.

[0093] In one embodiment, data module 10 specifically comprises:

[0094] The vehicle control unit (VCU) monitors the vehicle speed signal and operating status of the electric vehicle in real time to obtain vehicle status data.

[0095] In one embodiment, the control module 20 includes a judgment unit, a shutdown subunit, a holding subunit, a temperature subunit, a limit-hold subunit, and a limit-maintain subunit, specifically:

[0096] The judgment unit is used to obtain the vehicle speed of the electric vehicle from the vehicle status data. If the vehicle speed is greater than a preset value (such as 90km / h) and continues for more than a preset time (such as 10 minutes), the electric vehicle is in a high-speed driving state.

[0097] In the judgment unit of this embodiment, the energy consumption of electric vehicles is relatively high when driving at high speed. By judging whether the electric vehicle is driving at high speed, energy consumption can be managed more accurately and unnecessary energy waste can be avoided.

[0098] The shutdown subunit is used to determine, through the Temperature Management Module for Entire Vehicle (TMM), whether the temperature of several target components in the electric vehicle exceeds the corresponding preset value when the electric vehicle is in a high-speed driving state; the target components include the battery, motor, motor controller and charging and distribution system.

[0099] The shutdown subunit is also used to reduce the electric vehicle's energy consumption by shutting down all grilles and electric fans of the electric vehicle through the vehicle thermal management controller if the temperatures of several target components do not exceed the corresponding preset values.

[0100] The holding subunit is used to maintain the current opening state of the grille and the current state of the electric fan in the electric vehicle if the temperature of any of the target components exceeds the corresponding preset value.

[0101] It should be noted that the above active grille control strategy is on / off control, but it can also be a more complex control strategy, such as neural network control, with the aim of finding the optimal opening degree of the grille.

[0102] In this embodiment, in the closing subunit and the holding subunit, when the temperature of the target component does not exceed the preset value, closing all the grilles and electric fans of the electric vehicle can reduce unnecessary energy consumption. Closing the grilles helps reduce wind resistance, thereby reducing the energy consumption of the electric vehicle during operation, and closing the electric fans also avoids energy consumption caused by excessive heat dissipation. Conversely, when the temperature of the target component exceeds the preset value, maintaining the current state of the grilles and electric fans ensures that the electric vehicle's thermal management system can effectively dissipate heat, preventing components from overheating, thereby protecting the performance and safety of the electric vehicle.

[0103] Furthermore, by judging whether the temperature of several target components exceeds the limit, the system decides whether to close the grille or maintain its current opening. The aim is to close as many grilles as possible to reduce high-speed wind resistance, thereby reducing the energy consumption required to overcome this resistance. Generally, at high speeds, the airflow through the radiator is high enough to meet the radiator's cooling needs, and the fan can be turned off while driving.

[0104] The temperature subunit is used to obtain the ambient temperature of the electric vehicle from the vehicle status data;

[0105] The limiting-holding subunit is used to limit the compressor power to a preset maximum value through the air-conditioner controller (AC) when the electric vehicle's defrosting and defogging functions are not activated, in order to reduce the electric vehicle's energy consumption, provided that the ambient temperature is within a preset range; if the ambient temperature is outside the preset range, the compressor power is not limited.

[0106] Taking a certain A-class sedan as an example, the maximum power of the electric air conditioning compressor is 3500W. Under high-speed driving conditions, the air conditioning controller sets different power limits for the air conditioning compressor based on the ambient temperature, as follows:

[0107] ① When the ambient temperature is <0℃, the compressor power is not limited;

[0108] ② When the ambient temperature is ≥0℃ and <5℃, the maximum power limit of the compressor is set to 2500W;

[0109] ③ When the ambient temperature is ≥5℃ and <20℃, the maximum power limit of the compressor is set to 1500W;

[0110] ④ When the ambient temperature is ≥20℃ and <30℃, the maximum power limit of the compressor is set to 1000W;

[0111] ⑤ When the ambient temperature is ≥30℃ and <35℃, the maximum power limit of the compressor is set to 1500W;

[0112] ⑥ When the ambient temperature is ≥35℃ and <40℃, the maximum power limit of the compressor is set to 2500W;

[0113] ⑦ When the ambient temperature is ≥40℃, the compressor power is not limited.

[0114] The limiting-maintaining subunit is used to limit the power of the PTC (Positive Temperature Coefficient) heater to a preset maximum value based on the ambient temperature when the electric vehicle's defrosting and defogging functions are not activated, thereby reducing the electric vehicle's energy consumption. If the ambient temperature is within a preset range, the power of the PTC heater is not limited.

[0115] Taking a certain Class A sedan as an example, the maximum power of the PTC heater is 5000W. Under high-speed driving conditions, the air conditioning controller sets different power limits for the PTC heater based on the ambient temperature, as follows:

[0116] ① When the ambient temperature is < -10℃, the PTC power is not limited;

[0117] ② When the ambient temperature is ≥-10℃ and <0℃, the maximum power limit of the PTC is set to 3500W;

[0118] ③ When the ambient temperature is ≥0℃ and <5℃, the maximum power limit of the PTC is set to 2500W;

[0119] ④ When the ambient temperature is ≥5℃ and <15℃, the maximum power limit of the PTC is set to 2000W;

[0120] ⑤ When the ambient temperature is ≥15℃ and <25℃, the maximum power limit of the PTC is set to 1500W;

[0121] ⑥ When the ambient temperature is ≥25℃, the maximum power limit of the PTC is set to 1000W.

[0122] For examples of this application, please refer to [link / reference]. Figure 2 , Figure 2 This is a control flowchart provided in an embodiment of the present application, illustrating the general process of reducing the energy loss of electric vehicles by controlling the power of the grille, electric fan, compressor, and PTC heater to perform overall vehicle thermal management.

[0123] For examples of this application, please refer to [link / reference]. Figure 3 , Figure 3 This is a comparison diagram of the range degradation rate distribution provided in the embodiments of this application, showing the range degradation rate distribution before and after optimizing the thermal management control strategy for electric vehicles;

[0124] Figure 3 Taking a Class A sedan as an example, this study analyzed the range degradation rate distribution of 1920 vehicles before and after thermal management control strategy optimization under high-speed conditions (vehicle speed ≥ 90 km / h). After thermal management control strategy optimization, nearly 70% of users experienced a 5% to 7% reduction in range degradation rate, while 30% of users experienced an increase in range degradation rate, possibly related to aggressive driving and ultra-high-speed (> 120 km / h) driving.

[0125] In this embodiment, the temperature subunit, limit-hold subunit, and limit-maintain subunit limit the power of the compressor and PTC heater based on the ambient temperature when the electric vehicle's defrosting and defogging functions are not activated, which can significantly optimize energy consumption. Furthermore, this control strategy can intelligently adapt to changes in ambient temperature. When the ambient temperature exceeds a preset range, it does not limit the power of the compressor and PTC heater to ensure that the vehicle can cope with extreme weather conditions, such as severe cold or extreme heat. This intelligent adaptability helps to improve the reliability and stability of the vehicle.

[0126] In the control module 20 of this embodiment, when the temperature of key components such as the battery, motor, motor controller and charging and distribution system of the electric vehicle is too high, the grille and electric fan are closed in time by the vehicle thermal management controller, and the power of the compressor and PTC heater are limited. This can effectively reduce the temperature of these components and prevent performance degradation, damage or even safety accidents caused by overheating.

[0127] Overall, this application has the following beneficial effects:

[0128] Electric vehicles typically consume more energy at high speeds due to the increased air and rolling resistance they face. By determining when an electric vehicle is traveling at high speeds, more targeted energy-saving measures can be implemented. This means adjusting the thermal management and cooling system components only when the vehicle is traveling at high speeds, thus avoiding unnecessary energy increases. When an electric vehicle is traveling at high speeds and the temperature of target components is too high, the cooling system components may overheat and consume a large amount of electricity. Shutting down these components by controlling the vehicle's thermal management controller can significantly reduce unnecessary energy consumption. Simultaneously, the operation of the air conditioning system also increases the energy loss of the electric vehicle. When traveling at high speeds and needing to reduce energy consumption, limiting the power of the thermal management system by the air conditioning controller can reduce the energy consumption of the air conditioning system, thereby further reducing the overall energy consumption of the electric vehicle.

[0129] This application is based on the actual driving scenarios of users and optimizes the thermal management control logic. While ensuring that the power battery and other automotive components operate within a reasonable temperature range, it reduces high-speed range degradation and alleviates users' range anxiety.

[0130] Example 3:

[0131] This application provides a computer-readable storage medium, which includes a stored computer program, wherein the computer program, when running, controls the device where the computer-readable storage medium is located to execute the aforementioned electric vehicle high-speed driving thermal management control method.

[0132] The aforementioned method for thermal management control of electric vehicles at high speeds, when implemented as a software functional unit and used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0133] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A high-speed running thermal management control method for an electric vehicle, characterized by, The method comprises: acquiring vehicle state data of an electric vehicle; based on the vehicle state data, if the temperature of a plurality of target components in the electric vehicle exceeds a preset value, the electric vehicle's heat dissipation system components are closed by a vehicle thermal management controller, and the electric vehicle's thermal management system power is limited by an air conditioning controller to reduce the electric vehicle's power consumption, when the electric vehicle is in a preset high-speed driving state; wherein, if the temperature of a plurality of target components in the electric vehicle exceeds a preset value, the electric vehicle's heat dissipation system components are closed by a vehicle thermal management controller, and the electric vehicle's thermal management system power is limited by an air conditioning controller to reduce the electric vehicle's power consumption, specifically: if the temperature of the plurality of target components in the electric vehicle exceeds a preset value, the electric vehicle's grille and electronic fan are closed by the vehicle thermal management controller, and the electric vehicle's compressor power and PTC heater power are limited by the air conditioning controller to reduce the electric vehicle's power consumption; wherein the plurality of target components include a battery, a motor, a motor controller, and a charging and power supply system.

2. The thermal management control method for high-speed driving of an electric vehicle according to claim 1, characterized by, The electric vehicle's grille and electronic fan are closed by the vehicle thermal management controller, specifically: if the temperature of the plurality of target components does not exceed the corresponding preset value, all the electric vehicle's grilles and electronic fans are closed by the vehicle thermal management controller; if any temperature of the plurality of target components exceeds the corresponding preset value, the current opening state of the electric vehicle's grilles and the current state of the electric vehicle's electronic fans are maintained.

3. The thermal management control method for high-speed driving of an electric vehicle according to claim 1, characterized by, The electric vehicle's compressor power and PTC heater power are limited by the air conditioning controller, specifically: the ambient temperature of the electric vehicle is obtained from the vehicle state data; if the ambient temperature is within a preset range when the electric vehicle does not start the defrosting and demisting function, the compressor power and the PTC heater power are limited within a preset maximum value by the air conditioning controller according to the high and low of the ambient temperature; if the ambient temperature is not within the preset range, the compressor power and the PTC heater power are not limited.

4. The thermal management control method for high-speed driving of an electric vehicle according to claim 1, characterized by, When the electric vehicle is in a preset high-speed driving state, specifically: the vehicle speed of the electric vehicle is obtained from the vehicle state data, and if the vehicle speed is greater than a preset value and exceeds a preset time duration, the electric vehicle is in the high-speed driving state.

5. An electric vehicle high-speed running thermal management control device characterized by comprising: The method comprises a data module and a control module; wherein the data module is configured to acquire vehicle state data of an electric vehicle; the control module is configured to, based on the vehicle state data, if the temperature of a plurality of target components in the electric vehicle exceeds a preset value, the electric vehicle's heat dissipation system components are closed by a vehicle thermal management controller, and the electric vehicle's thermal management system power is limited by an air conditioning controller to reduce the electric vehicle's power consumption, when the electric vehicle is in a preset high-speed driving state; wherein the control module comprises a control unit; The control unit is configured to reduce the power loss of the electric vehicle by closing the grilles and electronic fans of the electric vehicle through the vehicle thermal management controller and limiting the compressor power and PTC heater power of the electric vehicle through the air conditioner controller if the temperature of the target components exceeds the preset value. The target components include a battery, a motor, a motor controller, and a charging and power supply system.

6. The electric vehicle high-speed travel thermal management control device of claim 5, wherein The control unit includes a closing subunit and a maintaining subunit. The closing subunit is configured to close all the grilles and electronic fans of the electric vehicle through the vehicle thermal management controller if the temperature of the target components does not exceed the corresponding preset value. The maintaining subunit is configured to maintain the current opening state of the grilles and the current state of the electronic fans in the electric vehicle if the temperature of any of the target components exceeds the corresponding preset value.

7. The high-speed travel thermal management control device for an electric vehicle according to claim 5, characterized by The control unit includes a temperature subunit, a limiting subunit, and a maintaining subunit. The temperature subunit is configured to obtain the ambient temperature of the electric vehicle from the vehicle state data. The limiting subunit is configured to limit the compressor power and the PTC heater power within the preset maximum value through the air conditioner controller according to the level of the ambient temperature if the ambient temperature is within the preset range and the electric vehicle does not start the defrosting and demisting function. The maintaining subunit is configured to not limit the compressor power and the PTC heater power if the ambient temperature is not within the preset range.

8. The electric vehicle high-speed travel thermal management control device of claim 5, wherein, The electric vehicle is in a preset high-speed driving state, specifically: The vehicle speed of the electric vehicle is obtained from the vehicle state data, and the electric vehicle is in the high-speed driving state if the vehicle speed is greater than a preset value and exceeds the preset time duration.

9. A storage medium, characterized by The storage medium stores a computer program, which is invoked and executed by a computer to implement the electric vehicle high-speed driving thermal management control method according to any one of claims 1 to 4.

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