Vehicle temperature control method and device, processor and vehicle

Abstract

The invention discloses a temperature control method and device of a vehicle, a processor and the vehicle, a refrigeration control system is provided through the vehicle, and the refrigeration control system at least comprises an electric compressor, a battery electronic expansion valve and an air conditioner electronic expansion valve. The method may be applied at least in the field of vehicles, and may include: determining an initial rotational speed of an electric compressor at a current moment; adjusting the initial rotation speed based on the refrigeration condition of the vehicle to obtain a target rotation speed; in the process that the electric compressor operates according to the target rotating speed, first attribute information of a battery electronic expansion valve and second attribute information of an air conditioner electronic expansion valve are determined; and controlling the temperature of the vehicle based on the first attribute information and the second attribute information. The technical problem that the refrigeration effect of the vehicle is poor is solved.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a vehicle temperature control method, device, processor and vehicle. Background Art

[0002] At present, for vehicles using liquid-cooled batteries, the battery cooling and the passenger compartment air conditioning refrigeration generally share the same compressor. If the battery needs to be cooled and the passenger compartment air conditioning also needs to be cooled, the passenger compartment air conditioning refrigeration is often directly cut off to allow the battery to cool down quickly.

[0003] However, the above-mentioned cut-off method will make it difficult to ensure the temperature of the passenger compartment, thereby causing a technical problem of poor cooling effect of the vehicle.

[0004] With respect to the technical problem of poor cooling effect of the above-mentioned vehicles, no effective solution has been proposed so far. Summary of the invention

[0005] Embodiments of the present invention provide a vehicle temperature control method, device, processor and vehicle to at least solve the technical problem of poor cooling effect of the vehicle.

[0006] According to one aspect of an embodiment of the present invention, a vehicle temperature control method is provided, and a refrigeration control system can be provided by the vehicle, and the refrigeration control system can include at least an electric compressor, a battery electronic expansion valve and an air-conditioning electronic expansion valve. The method may include: determining an initial speed of the electric compressor at a current moment; adjusting the initial speed based on the refrigeration condition of the vehicle to obtain a target speed; determining first attribute information of the battery electronic expansion valve and second attribute information of the air-conditioning electronic expansion valve during operation of the electric compressor at the target speed, wherein the first attribute information is used to indicate a first opening of the battery electronic expansion valve at a target moment, and the second attribute information is used to indicate a second opening of the air-conditioning electronic expansion valve at a target moment, and the target moment is later than the current moment; and controlling the temperature of the vehicle based on the first attribute information and the second attribute information.

[0007] Optionally, the refrigeration condition includes the historical refrigeration condition of the vehicle at a historical moment and the current refrigeration condition of the vehicle at a current moment, the historical moment being earlier than the current moment, and based on the refrigeration condition of the vehicle, adjusting the initial speed to obtain the target speed, including: determining the weight of the initial speed based on the historical refrigeration condition and the current refrigeration condition, wherein the weight is used to indicate the amplitude of adjusting the initial speed; adjusting the initial speed based on the weight to obtain the target speed.

[0008] Optionally, based on the historical refrigeration conditions and the current refrigeration conditions, the weight of the initial speed is determined, including: in response to the historical refrigeration condition being the first historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment, determining the weight to be the first weight, wherein the first historical refrigeration condition is used to indicate the condition in which the vehicle's refrigeration equipment has a refrigeration demand at a historical moment, and the first current refrigeration condition is used to indicate the condition in which the power supply equipment and the refrigeration equipment have a refrigeration demand at the current moment; in response to the historical refrigeration condition being the second historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, the weight is determined to be the first weight based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment. In response to the historical refrigeration condition being the third historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the temperature to which the vehicle's refrigeration equipment is to be adjusted, the weight is determined to be the third weight, wherein the third historical refrigeration condition is used to indicate a condition in which the power supply equipment of the vehicle had no refrigeration demand at a historical moment.

[0009] Optionally, based on the weight, the initial speed is adjusted to obtain the target speed, including: in response to the weight being a first weight, determining a first product between the first weight and the initial speed, superimposing the first product with the initial speed to obtain the target speed; in response to the weight being a second weight, determining a second product between the second weight and the initial speed, superimposing the second product with the initial speed to obtain the target speed; in response to the weight being a third weight, assigning the third weight to the initial speed to obtain the target speed.

[0010] Optionally, during the operation of the electric compressor at a target speed, first attribute information of the battery electronic expansion valve is determined, including: during the operation of the electric compressor at the target speed, a first actual superheat of the outlet of the refrigerator in the refrigeration control system is determined; a first difference between the first actual superheat and the target superheat of the outlet of the refrigerator is determined; from a first target database, a first adjustment parameter corresponding to the first difference is determined, wherein the first target database includes a mapping relationship between different first differences and different first adjustment parameters, and the first adjustment parameter is used to adjust the opening of the valve of the battery electronic expansion valve; in response to the opening moment of the valve of the battery electronic expansion valve reaching a first update moment, a first sum between the first adjustment parameter and the first historical opening of the valve of the battery electronic expansion valve at a historical moment is determined, and the first sum is updated to the first opening in the first attribute information, wherein the historical moment is earlier than the current moment.

[0011] Optionally, during the operation of the electric compressor at the target speed, second attribute information of the air conditioner electronic expansion valve is determined, including: during the operation of the electric compressor at the target speed, determining the actual surface temperature of the evaporator in the refrigeration control system and the second actual superheat of the outlet of the evaporator; based on the actual temperature and the second actual superheat, determining the second opening in the second attribute information.

[0012] Optionally, the second opening degree in the second attribute information is determined based on the actual temperature and the second actual superheat, including: in the process of controlling the temperature of the vehicle's refrigeration equipment based on the actual temperature, in response to the second actual superheat being lower than any target superheat in the target superheat range, determining the second opening degree in the second attribute information based on the second actual superheat.

[0013] Optionally, based on the first attribute information and the second attribute information, the temperature of the vehicle is controlled, including: in response to the valve opening of the battery electronic expansion valve being the first opening in the first attribute information, adjusting the temperature of the vehicle's power supply equipment from a first historical temperature to a first target temperature, wherein the first historical temperature is used to represent the historical temperature of the power supply equipment at a historical moment, and the first target temperature is used to represent the target temperature of the power supply equipment at a target moment; in response to the valve opening of the air-conditioning electronic expansion valve being the second opening in the second attribute information, adjusting the temperature of the vehicle's refrigeration equipment from the second historical temperature to the second target temperature, wherein the second historical temperature is used to represent the historical temperature of the refrigeration equipment at a historical moment, and the second target temperature is used to represent the target temperature of the refrigeration equipment at the target moment.

[0014] Optionally, determining the initial speed of the electric compressor at the current moment includes: determining the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment, and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment; inputting the actual temperature, the target temperature and the historical speed of the electric compressor at historical moments into a speed prediction model for prediction to obtain the initial speed, wherein the speed prediction model is generated based on a proportional-integral algorithm.

[0015] According to another aspect of an embodiment of the present invention, a temperature control device for a vehicle is also provided. A refrigeration control system can be provided by the vehicle. The refrigeration control system can include at least an electric compressor, a battery electronic expansion valve and an air-conditioning electronic expansion valve. The device can include: a first determination unit, used to determine the initial speed of the electric compressor at the current moment; an adjustment unit, used to adjust the initial speed based on the refrigeration condition of the vehicle to obtain a target speed; a second determination unit, used to determine first attribute information of the battery electronic expansion valve and second attribute information of the air-conditioning electronic expansion valve during the operation of the electric compressor at the target speed, wherein the first attribute information is used to indicate a first opening of the battery electronic expansion valve at the target moment, and the second attribute information is used to indicate a second opening of the air-conditioning electronic expansion valve at the target moment, the target moment being later than the current moment; a control unit, used to control the temperature of the vehicle based on the first attribute information and the second attribute information.

[0016] Optionally, the refrigeration conditions include historical refrigeration conditions of the vehicle at historical moments and current refrigeration conditions of the vehicle at the current moment, the historical moment being earlier than the current moment. The adjustment unit may include: a first determination module, used to determine the weight of the initial speed based on the historical refrigeration conditions and the current refrigeration conditions, wherein the weight is used to indicate the amplitude of adjusting the initial speed; an adjustment module, used to adjust the initial speed based on the weight to obtain the target speed.

[0017] Optionally, the first determination module may include: a first determination submodule, for determining a weight as a first weight based on an actual temperature of the coolant at a water inlet of a power supply device of the vehicle in response to a historical refrigeration condition being a first historical refrigeration condition and a current refrigeration condition being a first current refrigeration condition, wherein the first historical refrigeration condition is used to indicate a condition in which the refrigeration device of the vehicle has a refrigeration demand at a historical moment, and the first current refrigeration condition is used to indicate a condition in which the power supply device and the refrigeration device have a refrigeration demand at the current moment; a second determination submodule, for determining a weight as a first weight in response to a historical refrigeration condition being a second historical refrigeration condition and a current refrigeration condition being a first current refrigeration condition. The current refrigeration condition is determined to have a second weight based on the temperature to which the vehicle's refrigeration equipment is to be adjusted, wherein the second historical refrigeration condition is used to indicate a condition in which the vehicle's power supply equipment had a refrigeration demand at a historical moment; a third determination submodule is used to determine a weight as a third weight in response to the historical refrigeration condition being the third historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the temperature to which the vehicle's refrigeration equipment is to be adjusted, wherein the third historical refrigeration condition is used to indicate a condition in which the power supply equipment and the refrigeration equipment did not have a refrigeration demand at a historical moment.

[0018] Optionally, the adjustment module may include: a first superposition submodule, used to determine a first product between the first weight and the initial speed in response to the weight being the first weight, superimpose the first product with the initial speed to obtain a target speed; a second superposition submodule, used to determine a second product between the second weight and the initial speed in response to the weight being the second weight, superimpose the second product with the initial speed to obtain a target speed; and an assignment submodule, used to assign the third weight to the initial speed in response to the weight being the third weight, to obtain a target speed.

[0019] Optionally, the second determination unit may include: a second determination module, used to determine a first actual superheat of the outlet of the refrigerator in the refrigeration control system during the operation of the electric compressor at the target speed; a third determination module, used to determine a first difference between the first actual superheat and the target superheat of the outlet of the refrigerator; a fourth determination module, used to determine a first adjustment parameter corresponding to the first difference from a first target database, wherein the first target database includes a mapping relationship between different first differences and different first adjustment parameters, and the first adjustment parameter is used to adjust the opening of the valve of the battery electronic expansion valve; a fifth determination module, used to determine a first sum between the first adjustment parameter and the first historical opening of the valve of the battery electronic expansion valve at a historical moment in response to the opening moment of the valve of the battery electronic expansion valve reaching a first update moment, and update the first sum to the first opening in the first attribute information, wherein the historical moment is earlier than the current moment.

[0020] Optionally, the second determination unit may include: a sixth determination module, used to determine the actual surface temperature of the evaporator in the refrigeration control system and the second actual superheat of the evaporator outlet during the operation of the electric compressor at the target speed; a seventh determination module, used to determine the second opening degree in the second attribute information based on the actual temperature and the second actual superheat.

[0021] Optionally, the seventh determination module may include: a fourth determination submodule, used to determine the second opening degree in the second attribute information based on the second actual superheat in response to the second actual superheat being lower than any target superheat in the target superheat interval during the process of controlling the temperature of the vehicle's refrigeration equipment based on the actual temperature.

[0022] Optionally, the control unit may include: a first adjustment module, used to adjust the temperature of the vehicle's power supply equipment from a first historical temperature to a first target temperature in response to the valve opening of the battery electronic expansion valve being the first opening in the first attribute information, wherein the first historical temperature is used to represent the historical temperature of the power supply equipment at a historical moment, and the first target temperature is used to represent the target temperature of the power supply equipment at a target moment; a second adjustment module, used to adjust the temperature of the vehicle's refrigeration equipment from a second historical temperature to a second target temperature in response to the valve opening of the air-conditioning electronic expansion valve being the second opening in the second attribute information, wherein the second historical temperature is used to represent the historical temperature of the refrigeration equipment at a historical moment, and the second target temperature is used to represent the target temperature of the refrigeration equipment at the target moment.

[0023] Optionally, the first determination unit may include: an eighth determination module, used to determine the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment, and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment; a prediction module, used to input the actual temperature, the target temperature and the historical speed of the electric compressor at a historical moment into a speed prediction model for prediction to obtain an initial speed, wherein the speed prediction model is generated based on a proportional-integral algorithm.

[0024] According to another aspect of an embodiment of the present invention, a vehicle is provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes any one of the above methods when running.

[0025] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium including a stored executable program, wherein when the executable program runs, the device where the storage medium is located is controlled to execute any one of the above methods.

[0026] According to yet another aspect of an embodiment of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, any one of the above methods is implemented.

[0027] In an embodiment of the present invention, when controlling the temperature of the vehicle, the initial speed of the electric compressor at the current moment can be determined. According to the refrigeration working condition of the vehicle, the determined initial speed is adjusted to obtain the target speed. In the process of the electric compressor running at the target speed, the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve can be determined. According to the determined first attribute information and the second attribute information, the temperature of the vehicle can be controlled. Since in the embodiment of the present application, according to the refrigeration working condition of the vehicle, the initial speed of the electric compressor at the current moment is adjusted to obtain the target speed, in the process of the electric compressor running at the target speed, the first opening of the battery electronic expansion valve at the target moment and the second opening of the air-conditioning electronic expansion valve at the target moment can be determined, and according to the determined opening, the temperature of the vehicle can be controlled, thereby achieving the purpose of taking into account the cooling effect of the battery and the required temperature of the passenger compartment, thereby solving the technical problem of poor refrigeration effect of the vehicle, and then achieving the technical effect of improving the refrigeration effect of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] FIG1( a ) is a schematic diagram of an application scenario of a vehicle temperature control method according to an embodiment of the present invention;

[0030] FIG1( b ) is a flow chart of a temperature control method for a vehicle according to an embodiment of the present invention;

[0031] FIG. 2( a ) is a schematic diagram of a refrigeration control system for a vehicle according to an embodiment of the present invention;

[0032] FIG2( b ) is a schematic diagram of data interaction between a vehicle and a server according to an embodiment of the present invention;

[0033] Figure 3 is a structural block diagram of a temperature control device for a vehicle according to an embodiment of the present invention;

[0034] Figure 4 is a structural block diagram of a vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] According to an embodiment of the present invention, a temperature control method for a vehicle is provided.

[0038] As an optional embodiment, the temperature control method of the vehicle can be applied to, but not limited to, the application scenario shown in FIG. 1(a). FIG. 1(a) is a schematic diagram of an application scenario of a temperature control method of a vehicle according to an embodiment of the present invention. As shown in FIG. 1(a), in the application scenario, the mobile terminal 10 can communicate with the server 13 through the network 11, but not limited to, and the server 13 can perform operations on the database, such as writing data operations or reading data operations. The mobile terminal 10 can be a terminal device, and the terminal device can include, but not limited to, a human-computer interaction screen, a processor, and a memory. The human-computer interaction screen can be used to display a virtual machine on the mobile terminal 10, but not limited to. The vehicle 12 can be used to respond to the human-computer interaction operation, perform corresponding operations, or generate corresponding instructions, and send the generated instructions to the server 13. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in a different order than that here.

[0039] For example, the temperature control method of the vehicle in the present application can be used to provide battery cooling function and passenger compartment cooling function for preset application scenarios. The above-mentioned preset application scenarios may include the following scenarios in the vehicle field: commuting automatic driving scenarios, artificial intelligence (AI) driving scenarios for family cars, automatic parking assistance (APA) scenarios (such as memory parking for owned parking spaces in garages, smart parking for designated parking spaces in parking lots, etc.) and smart navigation assistance (Navigation Guided Pilot, NGP for short) scenarios in urban areas or high-speed areas, etc. In addition, the above-mentioned preset application scenarios may also include, but are not limited to: intelligent transportation scenarios of smart driving trucks or unmanned trucks in the field of logistics and transportation, and intelligent farming scenarios of self-driving agricultural vehicles in the field of agricultural machinery, etc.

[0040] When the above-mentioned preset application scenarios are scenarios in fields other than the vehicle field, those skilled in the art should be able to understand that the vehicle in the above-mentioned vehicle numbering method can be replaced with other objects (for example, agricultural machinery, drones, and robots, etc.), and correspondingly, the various devices and systems included in the vehicle can be replaced with devices and systems related to other objects. On this basis, in the embodiments of the present application, the specific implementation method of the above-mentioned vehicle numbering method is exemplified by taking the vehicle field as an example.

[0041] FIG1(b) is a flow chart of a temperature control method for a vehicle according to an embodiment of the present invention. A refrigeration control system may be provided by the vehicle, and the refrigeration control system may include at least an electric compressor, a battery electronic expansion valve, and an air conditioning electronic expansion valve. As shown in FIG1(b), the method may include the following steps:

[0042] Step S112, determining the initial rotation speed of the electric compressor at the current moment.

[0043] In the technical solution provided in the above step S112 of the present invention, the above initial rotation speed may be the rotation speed of the electric compressor pump (ECP) at any time in the current operation cycle.

[0044] In this embodiment, the initial speed of the electric compressor at the current moment is determined. Optionally, based on the historical speed of the electric compressor at the historical moment, the embodiment can determine the initial speed of the electric compressor at the current moment according to the historical speed and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment.

[0045] Optionally, the initial speed of the electric compressor at the current moment can be determined based on the acquired historical speed and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment. For example, at least the acquired historical speed and target temperature are input into a trained speed prediction model for prediction, and the initial speed of the electric compressor at the current moment can be obtained.

[0046] Step S114, adjusting the initial speed based on the cooling condition of the vehicle to obtain a target speed.

[0047] In the technical solution provided in the above step S114 of the present invention, the above refrigeration working condition can be used to represent the refrigeration effect to be achieved by the refrigeration equipment of the vehicle and the cooling effect to be achieved by the power supply equipment of the vehicle. For example, the refrigeration effect to be achieved by the refrigeration equipment can be, but not limited to, the cooling temperature to be achieved by the refrigeration equipment is 26°C, and the cooling effect to be achieved by the power supply equipment can be, but not limited to, the cooling temperature to be achieved by the power supply equipment is 35°C, which is only used as an example here and is not specifically limited.

[0048] In this embodiment, the refrigeration device may be an air conditioner of the vehicle, and the power supply device may be a battery, a battery group, or a battery pack of the vehicle, etc. These are merely examples and are not specifically limited.

[0049] In this embodiment, after determining the initial speed of the electric compressor at the current moment, the initial speed is adjusted based on the refrigeration condition of the vehicle to obtain the target speed. Optionally, this embodiment can obtain the refrigeration condition of the vehicle on the basis of determining the initial speed. By dividing the obtained refrigeration conditions in chronological order, the historical refrigeration conditions of the vehicle at historical moments and the current refrigeration conditions of the vehicle at the current moment can be obtained. Based on the above-mentioned historical refrigeration conditions and the above-mentioned current refrigeration conditions, the initial speed of the electric compressor can be adjusted to obtain the target speed of the electric compressor.

[0050] Step S116, while the electric compressor is running at the target speed, determining the first attribute information of the battery electronic expansion valve and the second attribute information of the air conditioner electronic expansion valve.

[0051] In the technical solution provided in step S116 of the present invention, the first attribute information can be used to indicate the first opening of the battery electronic expansion valve (BatEXV) at the target time. The battery electronic expansion valve can be used to control the temperature of the power supply equipment of the vehicle. For example, BatEXV can be used to control the temperature of the battery of the vehicle. This is only an example and is not specifically limited.

[0052] In this embodiment, the second attribute information can be used to indicate the second opening of the air-conditioning electronic expansion valve (AcEXV) at the target time. The air-conditioning electronic expansion valve can be used to control the temperature of the vehicle's refrigeration equipment. For example, AcEXV can be used to control the temperature of the vehicle's air conditioner. This is only an example and is not specifically limited.

[0053] In this embodiment, the target time may be later than the current time.

[0054] In this embodiment, after adjusting the initial speed based on the refrigeration condition of the vehicle and obtaining the target speed, the first attribute information of the battery electronic expansion valve is determined during the operation of the electric compressor at the target speed. Optionally, based on the target speed, during the operation of the electric compressor at the target speed, the embodiment can determine the first actual superheat of the outlet of the chiller in the refrigeration control system and the target superheat of the outlet of the chiller. Based on the determined first actual superheat and the target superheat, the first attribute information of the battery electronic expansion valve can be determined, that is, the first opening of the battery electronic expansion valve at the target time can be determined.

[0055] In this embodiment, after adjusting the initial speed based on the refrigeration condition of the vehicle and obtaining the target speed, the second attribute information of the air-conditioning electronic expansion valve is determined while the electric compressor is running at the target speed. Optionally, on the basis of obtaining the target speed, the embodiment can determine the actual temperature of the surface of the evaporator in the refrigeration control system while the electric compressor is running at the target speed. Based on the determined actual temperature and the second actual superheat of the outlet of the evaporator, the second attribute information of the air-conditioning electronic expansion valve can be determined, that is, the second opening of the air-conditioning electronic expansion valve at the target time can be determined.

[0056] It should be noted that the above method of determining the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve during the operation of the electric compressor at the target speed is only for illustrative purposes and is not specifically limited here. As long as the process and method can determine the first opening of the battery electronic expansion valve at the target time and the second opening of the air-conditioning electronic expansion valve at the target time during the operation of the electric compressor at the target speed, they are all within the scope of protection of the embodiments of the present application and will not be described one by one here.

[0057] Step S118, controlling the temperature of the vehicle based on the first attribute information and the second attribute information.

[0058] In the technical solution provided in the above step S118 of the present invention, during the operation of the electric compressor at the target speed, after determining the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve, the temperature of the vehicle is controlled based on the first attribute information and the second attribute information. Optionally, based on the determination of the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve, the embodiment can control the temperature of the power supply device of the vehicle according to the determined first attribute information of the battery electronic expansion valve, and can control the temperature of the refrigeration device of the vehicle according to the determined second attribute information of the air-conditioning electronic expansion valve.

[0059] Optionally, the opening of the battery electronic expansion valve is compared with the first opening in the first attribute information to obtain a first comparison result, wherein the first comparison result can be used to indicate the relationship between the opening of the battery electronic expansion valve and the first opening in the first attribute information. According to the obtained first comparison result, the temperature of the power supply device of the vehicle can be controlled, for example, the temperature of the battery of the vehicle can be reduced, which is only used as an example and is not specifically limited.

[0060] Optionally, the opening of the valve of the air conditioner electronic expansion valve is compared with the second opening in the second attribute information to obtain a second comparison result, wherein the second comparison result can be used to indicate the relationship between the opening of the valve of the air conditioner electronic expansion valve and the second opening in the second attribute information. According to the obtained second comparison result, the temperature of the refrigeration equipment of the vehicle can be controlled, for example, the temperature of the air conditioner of the vehicle can be lowered, which is only used as an example and is not specifically limited.

[0061] It should be noted that the vehicle temperature control method in the present application can also be applied to at least the following scenarios: autonomous driving scenario, assisted driving scenario and passive driving scenario (which can be referred to as human driving scenario). Among them, the autonomous driving scenario can be used to indicate that the vehicle control system controls the vehicle driving during the driving process, and the driving object does not need to maintain control and supervision of the driving. The assisted driving scenario can be used to indicate that the vehicle control system provides auxiliary functions during the driving process, but the driving object still needs to maintain control and supervision of the driving. The passive driving scenario can be used to indicate the scenario where the driving object controls the vehicle to complete the driving operation.

[0062] In the artificial intelligence AI driving of autonomous vehicles, commuting mode usually refers to a driving mode designed for commuting or daily commuting. Among them, the AI ​​driving can collect data by learning the user's driving route and driving behavior. When all the learning is completed, the collected data is screened and checked, and then the full segment of data after screening and checking is automatically transmitted back to the cloud server to execute the construction of the cloud map. The next time you drive and choose the same route, the AI ​​driving will be activated, and the vehicle will be driven to the destination of the route according to the constructed cloud map. Among them, matching and complementing the offline map with the constructed cloud map can improve the accuracy of the cloud map.

[0063] In the above steps S112 to S118 of the present application, when controlling the temperature of the vehicle, the initial speed of the electric compressor at the current moment can be determined. According to the refrigeration working condition of the vehicle, the determined initial speed is adjusted to obtain the target speed. In the process of the electric compressor running at the target speed, the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve can be determined. According to the determined first attribute information and the second attribute information, the temperature of the vehicle can be controlled. Since in the embodiment of the present application, according to the refrigeration working condition of the vehicle, the initial speed of the electric compressor at the current moment is adjusted to obtain the target speed, in the process of the electric compressor running at the target speed, the first opening of the battery electronic expansion valve at the target moment and the second opening of the air-conditioning electronic expansion valve at the target moment can be determined, and according to the determined opening, the temperature of the vehicle can be controlled, thereby achieving the purpose of taking into account the cooling effect of the battery and the required temperature of the passenger compartment, thereby solving the technical problem of poor refrigeration effect of the vehicle, and then achieving the technical effect of improving the refrigeration effect of the vehicle.

[0064] The above method of this embodiment is further introduced below.

[0065] As an optional implementation method, the refrigeration condition includes the historical refrigeration condition of the vehicle at a historical moment and the current refrigeration condition of the vehicle at a current moment, the historical moment is earlier than the current moment, step S114, based on the refrigeration condition of the vehicle, adjusts the initial speed to obtain the target speed, including: determining the weight of the initial speed based on the historical refrigeration condition and the current refrigeration condition; based on the weight, adjusts the initial speed to obtain the target speed.

[0066] In this embodiment, the above-mentioned cooling conditions may include historical cooling conditions of the vehicle at historical moments and current cooling conditions of the vehicle at the current moment, wherein the historical moment may be earlier than the current moment.

[0067] In this embodiment, the above historical refrigeration conditions can be used to indicate the refrigeration effect to be achieved by the vehicle's refrigeration equipment and the cooling effect to be achieved by the vehicle's power supply equipment at the historical moment. For example, at the historical moment, the refrigeration effect to be achieved by the refrigeration equipment can be, but not limited to, the refrigeration temperature to be achieved by the refrigeration equipment is 25°C, and at the historical moment, the cooling effect to be achieved by the power supply equipment can be, but not limited to, the cooling temperature to be achieved by the power supply equipment is 37°C. This is only an example and is not specifically limited.

[0068] In this embodiment, the above current refrigeration condition can be used to indicate the refrigeration effect to be achieved by the refrigeration equipment of the vehicle and the cooling effect to be achieved by the power supply equipment of the vehicle at the current moment. For example, at the current moment, the refrigeration effect to be achieved by the refrigeration equipment can be, but not limited to, the cooling temperature to be achieved by the refrigeration equipment is 24°C, and at the current moment, the cooling effect to be achieved by the power supply equipment can be, but not limited to, the cooling temperature to be achieved by the power supply equipment is 34°C. This is only an example and is not specifically limited.

[0069] In this embodiment, the weights mentioned above can be used to indicate the magnitude of adjusting the initial rotation speed.

[0070] In this embodiment, after determining the initial speed of the electric compressor at the current moment, the weight of the initial speed is determined based on the historical refrigeration conditions and the current refrigeration conditions. Optionally, this embodiment can obtain the refrigeration conditions of the vehicle on the basis of determining the initial speed. By dividing the acquired refrigeration conditions in chronological order, the historical refrigeration conditions of the vehicle at historical moments and the current refrigeration conditions of the vehicle at the current moment can be obtained. Based on the above-mentioned historical refrigeration conditions and the above-mentioned current refrigeration conditions, the weight of the initial speed can be determined, that is, the amplitude of adjusting the initial speed can be determined, thereby achieving the purpose of determining the amplitude of adjusting the speed and realizing the technical effect of increasing the speed adjustment speed.

[0071] In this embodiment, after determining the weight of the initial speed based on the historical refrigeration conditions and the current refrigeration conditions, the initial speed is adjusted based on the weight to obtain the target speed. Optionally, this embodiment can determine the speed adjustment method corresponding to the weight on the basis of determining the weight of the initial speed. According to the determined adjustment method, the initial speed of the electric compressor is adjusted to obtain the target speed of the electric compressor, thereby achieving the purpose of adjusting the initial speed of the electric compressor and realizing the technical effect of improving the working efficiency of the electric compressor.

[0072] The method for determining the weight of the initial rotation speed based on the historical refrigeration conditions and the current refrigeration conditions of this embodiment is further described below.

[0073] As an optional implementation method, the weight of the initial speed is determined based on the historical refrigeration conditions and the current refrigeration conditions, including: in response to the historical refrigeration condition being the first historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment, determining the weight to be the first weight; in response to the historical refrigeration condition being the second historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, based on the temperature to which the vehicle's refrigeration equipment is to be adjusted, determining the weight to be the second weight; in response to the historical refrigeration condition being the third historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the temperature to which the vehicle's refrigeration equipment is to be adjusted, determining the weight to be the third weight.

[0074] In this embodiment, the first historical refrigeration operating condition can be used to indicate the operating condition of the vehicle's refrigeration device having a refrigeration demand at a historical moment. The first current refrigeration operating condition can be used to indicate the operating condition of the power supply device and the refrigeration device having a refrigeration demand at the current moment.

[0075] In this embodiment, after determining the initial speed of the electric compressor at the current moment, in response to the historical refrigeration condition being the first historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, the weight is determined to be the first weight based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment. Optionally, this embodiment, on the basis of determining the initial speed, judges the relationship between the historical refrigeration condition and the first historical refrigeration condition, the second historical refrigeration condition, and the third historical refrigeration condition, and judges the relationship between the current refrigeration condition and the first current refrigeration condition, and a first judgment result can be obtained. If the first judgment result obtained indicates that the historical refrigeration condition is the first historical refrigeration condition, and the current refrigeration condition is the first current refrigeration condition, then according to the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment (for example, represented by Tin), the weight can be determined to be the first weight (for example, represented by K1), thereby achieving the purpose of determining the weight of the initial speed and realizing the technical effect of improving the adjustment accuracy of the initial speed.

[0076] In this embodiment, the second historical refrigeration operating condition may be used to indicate an operating condition in which the power supply device of the vehicle has a refrigeration demand at a historical moment.

[0077] In this embodiment, after determining the initial speed of the electric compressor at the current moment, in response to the historical refrigeration condition being the second historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, the weight is determined to be the second weight based on the temperature to which the vehicle's refrigeration equipment is to be adjusted. Optionally, this embodiment, on the basis of determining the initial speed, judges the relationship between the historical refrigeration condition and the first historical refrigeration condition, the second historical refrigeration condition, and the third historical refrigeration condition, and judges the relationship between the current refrigeration condition and the first current refrigeration condition, and a first judgment result can be obtained. If the first judgment result obtained indicates that the historical refrigeration condition is the second historical refrigeration condition, and the current refrigeration condition is the first current refrigeration condition, then according to the temperature to which the vehicle's refrigeration equipment is to be adjusted, the weight can be determined to be the second weight (for example, represented by K2), thereby achieving the purpose of determining the weight of the initial speed and realizing the technical effect of improving the adjustment accuracy of the initial speed.

[0078] It should be noted that the temperature to which the refrigeration equipment of the above vehicle is to be adjusted can be consistent with the temperature required to be reached in the passenger compartment of the vehicle. For example, if the temperature required to be reached in the passenger compartment of the vehicle is 23°C, the temperature to which the refrigeration equipment of the vehicle is to be adjusted can be 23°C. The temperature here is only for illustration and is not specifically limited.

[0079] In this embodiment, the third historical refrigeration operating condition may be used to indicate an operating condition in which the power supply device and the refrigeration device have no refrigeration demand at a historical moment.

[0080] In this embodiment, after determining the initial speed of the electric compressor at the current moment, in response to the historical refrigeration condition being the third historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, the weight is determined to be the third weight based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the temperature to which the vehicle's refrigeration equipment is to be adjusted. Optionally, on the basis of determining the initial speed, this embodiment judges the relationship between the historical refrigeration condition and the first historical refrigeration condition, the second historical refrigeration condition, and the third historical refrigeration condition, and judges the relationship between the current refrigeration condition and the first current refrigeration condition, and a first judgment result can be obtained. If the first judgment result obtained indicates that the historical refrigeration condition is the third historical refrigeration condition and the current refrigeration condition is the first current refrigeration condition, then according to the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the temperature to which the vehicle's refrigeration equipment is to be adjusted, the weight can be determined to be the third weight (for example, represented by n_ini), thereby achieving the purpose of determining the weight of the initial speed and realizing the technical effect of improving the adjustment accuracy of the initial speed.

[0081] Optionally, n_ini=n_ini1+n_ini2, wherein n_ini1 can be obtained by looking up a calibration table according to the cooling demand of the passenger compartment for the air conditioner, and n_ini2 can be obtained by looking up a calibration table according to the temperature (Tin) or △Tin of the coolant at the water inlet of the current battery pack.

[0082] The method for adjusting the initial rotation speed based on the weight to obtain the target rotation speed in this embodiment is further described below.

[0083] As an optional implementation method, the initial speed is adjusted based on the weight to obtain the target speed, including: in response to the weight being a first weight, determining a first product between the first weight and the initial speed, superimposing the first product with the initial speed to obtain the target speed; in response to the weight being a second weight, determining a second product between the second weight and the initial speed, superimposing the second product with the initial speed to obtain the target speed; in response to the weight being a third weight, assigning the third weight to the initial speed to obtain the target speed.

[0084] In this embodiment, the above-mentioned number that has been selected can be stored in the list of the number that has been selected. The above-mentioned waiting time can be used to indicate the time length that has passed from the time of selecting a number to the time of receiving a number.

[0085] In this embodiment, after determining the weight of the initial speed based on the historical refrigeration conditions and the current refrigeration conditions, in response to the weight being the first weight, a first product between the first weight and the initial speed is determined, and the first product is superimposed on the initial speed to obtain a target speed. Optionally, this embodiment, on the basis of determining the weight of the initial speed, judges the relationship between the determined weight and the first weight, the second weight, and the third weight to obtain a second judgment result. If the second judgment result obtained indicates that the weight is the first weight, the speed adjustment method corresponding to the first weight can be determined as follows: determine the first product between the first weight and the initial speed (for example, represented by n_k), and superimpose the determined first product on the initial speed to obtain the target speed, thereby achieving the purpose of adjusting the initial speed of the electric compressor and realizing the technical effect of improving the working efficiency of the electric compressor.

[0086] Optionally, the determined first product is superimposed on the initial speed to obtain the target speed. For example, K1*n_k is slowly superimposed on the current n_k to obtain the target speed, which is only an example and not specifically limited.

[0087] In this embodiment, after determining the weight of the initial speed based on the historical refrigeration conditions and the current refrigeration conditions, in response to the weight being the second weight, a second product between the second weight and the initial speed is determined, and the second product is superimposed on the initial speed to obtain a target speed. Optionally, this embodiment, on the basis of determining the weight of the initial speed, judges the relationship between the determined weight and the first weight, the second weight, and the third weight to obtain a second judgment result. If the obtained second judgment result indicates that the weight is the second weight, the speed adjustment method corresponding to the second weight can be determined as follows: determine the second product between the second weight and the initial speed, and superimpose the determined second product on the initial speed to obtain the target speed, thereby achieving the purpose of adjusting the initial speed of the electric compressor and realizing the technical effect of improving the working efficiency of the electric compressor.

[0088] Optionally, the determined second product is superimposed on the initial speed to obtain the target speed. For example, K2*n_k is slowly superimposed on the current n_k to obtain the target speed, which is only an example and not specifically limited.

[0089] In this embodiment, after determining the weight of the initial speed based on the historical refrigeration conditions and the current refrigeration conditions, in response to the weight being the third weight, the third weight is assigned to the initial speed to obtain the target speed. Optionally, this embodiment determines the relationship between the determined weight and the first weight, the second weight, and the third weight on the basis of determining the weight of the initial speed, and a second judgment result can be obtained. If the second judgment result obtained indicates that the weight is the third weight, the speed adjustment method corresponding to the third weight can be determined as follows: the third weight is assigned to the initial speed to obtain the target speed, thereby achieving the purpose of adjusting the initial speed of the electric compressor and realizing the technical effect of improving the working efficiency of the electric compressor.

[0090] Optionally, the third weight is assigned to the initial speed to obtain the target speed. For example, according to n_k=n_ini, n_ini is assigned to the current n_k to obtain the target speed, which is only an example and not specifically limited.

[0091] The following further describes the method for determining the first attribute information of the battery electronic expansion valve when the electric compressor is running at the target speed in the embodiment.

[0092] As an optional implementation method, step S116, in the process of the electric compressor running at the target speed, determines the first attribute information of the battery electronic expansion valve, including: in the process of the electric compressor running at the target speed, determines the first actual superheat of the outlet of the refrigerator in the refrigeration control system; determines the first difference between the first actual superheat and the target superheat of the outlet of the refrigerator; determines the first adjustment parameter corresponding to the first difference from the first target database; in response to the opening time of the valve of the battery electronic expansion valve reaching the first update time, determines the first sum between the first adjustment parameter and the first historical opening of the valve of the battery electronic expansion valve at the historical moment, and updates the first sum to the first opening in the first attribute information.

[0093] In this embodiment, the above historical moment may be earlier than the current moment.

[0094] In this embodiment, the first actual superheat degree may be represented by SH_Chiller_Act.

[0095] In this embodiment, after adjusting the initial speed based on the refrigeration condition of the vehicle and obtaining the target speed, the first actual superheat of the outlet of the refrigerator in the refrigeration control system is determined during the operation of the electric compressor at the target speed. Optionally, on the basis of obtaining the target speed, the embodiment can determine the actual temperature of the refrigerant at the Chiller outlet (for example, represented by Tr1) and the saturation temperature of the refrigerant at the Chiller outlet during the operation of the electric compressor at the target speed. The difference between the actual temperature of the Chiller outlet refrigerant and the saturation temperature of the Chiller outlet refrigerant is calculated to obtain the difference between the actual temperature and the saturation temperature, and the difference between the actual temperature and the saturation temperature is determined as the first actual superheat of the outlet of the refrigerator in the refrigeration control system, thereby achieving the purpose of determining the actual superheat of the outlet of the refrigerator, and realizing the technical effect of improving the efficiency of the valve of the battery electronic expansion valve.

[0096] In this embodiment, the target superheat degree at the outlet of the refrigerator can be represented by SH_Chiller_Trgt. The first difference can be represented by ΔSH_Chiller.

[0097] In this embodiment, during the operation of the electric compressor at the target speed, after determining the first actual superheat at the outlet of the refrigerator in the refrigeration control system, a first difference between the first actual superheat and the target superheat at the outlet of the refrigerator is determined. Optionally, on the basis of determining the first actual superheat, this embodiment calculates the difference between the determined first actual superheat and the target superheat at the outlet of the refrigerator, and can obtain the first difference between the first actual superheat and the target superheat, thereby achieving the purpose of determining the difference between the actual superheat at the outlet of the refrigerator and the target superheat, and realizing the technical effect of improving the efficiency of adjusting the valve of the battery electronic expansion valve.

[0098] In this embodiment, the first target database may include mapping relationships between different first differences and different first adjustment parameters, wherein the first adjustment parameter may be used to adjust the valve opening of the battery electronic expansion valve.

[0099] In this embodiment, after determining the first difference between the first actual superheat and the target superheat at the outlet of the refrigerator, a first adjustment parameter corresponding to the first difference is determined from the first target database. Optionally, based on the determination of the first difference, the embodiment can find the first adjustment parameter corresponding to the first difference from the first target database according to the mapping relationship between different first differences and different first adjustment parameters, thereby achieving the purpose of adjusting the valve opening of the battery electronic expansion valve and realizing the technical effect of improving the efficiency of adjusting the valve of the battery electronic expansion valve.

[0100] In this embodiment, the first update time may be used to indicate the time of updating the valve opening of the battery electronic expansion valve. The first update time may be adjusted according to the size of ΔSH_Chiller.

[0101] In this embodiment, the first opening degree can be represented by the opening degree of BatEXV.

[0102] In this embodiment, after determining the first adjustment parameter corresponding to the first difference from the first target database, in response to the opening time of the battery electronic expansion valve valve reaching the first update time, the first sum between the first adjustment parameter and the first historical opening of the battery electronic expansion valve valve at the historical time is determined, and the first sum is updated to the first opening in the first attribute information. Optionally, on the basis of determining the first adjustment parameter corresponding to the first difference, the embodiment judges whether the opening time of the battery electronic expansion valve valve reaches the first update time, and a third judgment result can be obtained. If the third judgment result obtained is that the opening time of the battery electronic expansion valve valve reaches the first update time, the first adjustment parameter and the first historical opening of the battery electronic expansion valve valve at the historical time are summed and calculated, and the first sum between the above-mentioned first adjustment parameter and the above-mentioned first historical opening can be obtained, and the above-mentioned first sum is updated to the first opening in the first attribute information, thereby achieving the purpose of adjusting the opening of the battery electronic expansion valve valve and realizing the technical effect of improving the efficiency of adjusting the battery electronic expansion valve valve.

[0103] The following further describes the method for determining the second attribute information of the air-conditioning electronic expansion valve when the electric compressor is running at the target speed in the embodiment.

[0104] As an optional implementation method, step S116, while the electric compressor is running at the target speed, determines the second attribute information of the air conditioner electronic expansion valve, including: while the electric compressor is running at the target speed, determining the actual surface temperature of the evaporator in the refrigeration control system and the second actual superheat of the outlet of the evaporator; based on the actual temperature and the second actual superheat, determining the second opening in the second attribute information.

[0105] In this embodiment, the second actual superheat degree may be represented by SH_Evap_Act.

[0106] In this embodiment, after adjusting the initial speed based on the refrigeration condition of the vehicle and obtaining the target speed, the actual temperature of the surface of the evaporator in the refrigeration control system and the second actual superheat of the outlet of the evaporator are determined during the operation of the electric compressor at the target speed. Optionally, on the basis of obtaining the target speed, the embodiment detects the current temperature of the surface of the evaporator in the refrigeration control system during the operation of the electric compressor at the target speed, and the actual temperature of the surface of the evaporator can be obtained. On the basis of determining the actual temperature of the refrigerant at the evaporator outlet (for example, represented by Tr2) and the saturation temperature of the refrigerant at the evaporator outlet, the actual temperature of the refrigerant at the evaporator outlet and the saturation temperature of the refrigerant at the evaporator outlet are calculated to obtain the difference between the actual temperature and the saturation temperature, and the difference between the actual temperature and the saturation temperature is determined as the second actual superheat of the outlet of the evaporator, thereby achieving the purpose of determining the actual superheat of the outlet of the evaporator and realizing the technical effect of improving the efficiency of adjusting the valve of the air conditioner electronic expansion valve.

[0107] In this embodiment, the second opening degree can be represented by the opening degree of AcEXV.

[0108] In this embodiment, after determining the actual temperature of the surface of the evaporator in the refrigeration control system and the second actual superheat at the outlet of the evaporator during the operation of the electric compressor at the target speed, the second opening in the second attribute information is determined based on the actual temperature and the second actual superheat. Optionally, in this embodiment, based on the determination of the actual temperature of the surface of the evaporator and the second actual superheat, in the process of controlling the temperature of the refrigeration equipment of the vehicle according to the actual temperature of the surface of the evaporator, the second actual superheat is monitored, and the second opening in the second attribute information can be determined based on the monitoring result, thereby achieving the purpose of determining the opening of the valve of the air-conditioning electronic expansion valve and realizing the technical effect of improving the efficiency of adjusting the valve of the air-conditioning electronic expansion valve.

[0109] The method for determining the second opening degree in the second attribute information based on the actual temperature and the second actual superheat of this embodiment is further described below.

[0110] As an optional embodiment, the second opening degree in the second attribute information is determined based on the actual temperature and the second actual superheat, including: in the process of controlling the temperature of the vehicle's refrigeration equipment based on the actual temperature, in response to the second actual superheat being lower than any target superheat in the target superheat range, determining the second opening degree in the second attribute information based on the second actual superheat.

[0111] In this embodiment, the target superheat range may be, but is not limited to, a hysteresis range of [2° C., 5° C.], which is merely an example and not specifically limited.

[0112] In this embodiment, during the operation of the electric compressor at the target speed, after determining the actual temperature of the surface of the evaporator in the refrigeration control system and the second actual superheat at the outlet of the evaporator, in the process of controlling the temperature of the vehicle's refrigeration equipment based on the actual temperature, in response to the second actual superheat being lower than any target superheat in the target superheat interval, the second opening in the second attribute information is determined based on the second actual superheat. Optionally, this embodiment monitors the second actual superheat in the process of controlling the temperature of the vehicle's refrigeration equipment based on the actual temperature of the evaporator surface, based on the determination of the actual temperature of the evaporator surface and the second actual superheat. If the monitoring result obtained indicates that the second actual superheat is lower than any target superheat in the target superheat interval, the second opening in the second attribute information can be determined based on the second actual superheat, thereby achieving the purpose of determining the valve opening of the air conditioner electronic expansion valve and realizing the technical effect of improving the efficiency of adjusting the valve of the air conditioner electronic expansion valve.

[0113] Optionally, according to the above-mentioned second actual superheat, the second opening in the second attribute information can be determined, including: when the second actual superheat is lower than any target superheat in the target superheat interval, the second difference between the actual temperature and the target temperature of the surface of the evaporator can be determined. From the second target database, a second adjustment parameter corresponding to the second difference can be determined, wherein the second target database includes a mapping relationship between different second differences and different second adjustment parameters, and the second adjustment parameter is used to adjust the opening of the valve of the air-conditioning electronic expansion valve. In response to the opening time of the valve of the air-conditioning electronic expansion valve reaching the second update time, the second sum between the second adjustment parameter and the second historical opening of the valve of the air-conditioning electronic expansion valve at the historical time can be determined, and the second sum is updated to the second opening in the second attribute information, wherein the second update time can be used to indicate the time of updating the opening of the valve of the air-conditioning electronic expansion valve, and the above-mentioned second update time can be adjusted according to the temperature difference of the evaporator, and the temperature difference can be represented by △Te.

[0114] The method for controlling the temperature of a vehicle based on the first attribute information and the second attribute information of this embodiment is further described below.

[0115] As an optional implementation method, step S118 controls the temperature of the vehicle based on the first attribute information and the second attribute information, including: in response to the valve opening of the battery electronic expansion valve being the first opening in the first attribute information, adjusting the temperature of the vehicle's power supply equipment from the first historical temperature to the first target temperature; in response to the valve opening of the air-conditioning electronic expansion valve being the second opening in the second attribute information, adjusting the temperature of the vehicle's refrigeration equipment from the second historical temperature to the second target temperature.

[0116] In this embodiment, the first historical temperature may be used to represent the historical temperature of the power supply device at a historical moment, and the first target temperature may be used to represent the target temperature of the power supply device at a target moment.

[0117] In this embodiment, during the operation of the electric compressor at the target speed, after determining the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve, in response to the valve opening of the battery electronic expansion valve being the first opening in the first attribute information, the temperature of the vehicle's power supply equipment is adjusted from the first historical temperature to the first target temperature. Optionally, on the basis of determining the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve, this embodiment compares the relationship between the valve opening of the battery electronic expansion valve and the first opening in the first attribute information, and a first comparison result can be obtained. If the first comparison result obtained indicates that the valve opening of the battery electronic expansion valve is the first opening in the first attribute information, the temperature of the vehicle's power supply equipment is adjusted from the first historical temperature to the first target temperature, thereby achieving the purpose of adjusting the temperature of the vehicle's power supply equipment, and further achieving the technical effect of improving the vehicle's cooling effect.

[0118] In this embodiment, the second historical temperature may be used to represent the historical temperature of the refrigeration device at a historical moment, and the second target temperature may be used to represent the target temperature of the refrigeration device at a target moment.

[0119] In this embodiment, during the operation of the electric compressor at the target speed, after determining the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve, in response to the valve opening of the air-conditioning electronic expansion valve being the second opening in the second attribute information, the temperature of the vehicle's refrigeration equipment is adjusted from the second historical temperature to the second target temperature. Optionally, on the basis of determining the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve, this embodiment compares the relationship between the valve opening of the air-conditioning electronic expansion valve and the second opening in the second attribute information to obtain a second comparison result. If the second comparison result obtained indicates that the valve opening of the air-conditioning electronic expansion valve is the second opening in the second attribute information, the temperature of the vehicle's refrigeration equipment is adjusted from the second historical temperature to the second target temperature, thereby achieving the purpose of adjusting the temperature of the vehicle's refrigeration equipment, and further achieving the technical effect of improving the refrigeration effect of the vehicle.

[0120] The method for determining the initial rotation speed of the electric compressor at the current moment in this embodiment is further described below.

[0121] As an optional implementation method, step S112, determining the initial speed of the electric compressor at the current moment, includes: determining the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment, and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment; inputting the actual temperature, the target temperature and the historical speed of the electric compressor at historical moments into the speed prediction model for prediction to obtain the initial speed.

[0122] In this embodiment, the speed prediction model may be generated based on a proportional-integral algorithm, wherein the proportional-integral algorithm may be, but is not limited to, an incremental proportional-integral (PI) algorithm.

[0123] In this embodiment, the target temperature may be represented by Tin, and the historical rotation speed may be represented by n_k-1.

[0124] In this embodiment, the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment are determined. Optionally, this embodiment detects the current temperature of the coolant at the water inlet of the vehicle's power supply equipment, and can obtain the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment, and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment can be obtained from the cloud or locally, thereby achieving the purpose of determining the actual temperature and target temperature of the coolant, and further achieving the technical effect of improving the efficiency of determining the initial speed of the electric compressor at the current moment.

[0125] In this embodiment, after determining the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment, the actual temperature, the target temperature and the historical speed of the electric compressor at historical moments are input into the speed prediction model for prediction to obtain the initial speed. Optionally, this embodiment obtains the historical speed of the electric compressor at historical moments on the basis of determining the actual temperature and the target temperature of the coolant, and inputs the determined actual temperature, target temperature and historical speed of the coolant into the speed prediction model for prediction to obtain the initial speed, thereby achieving the purpose of determining the speed of the electric compressor at any moment in the current operation cycle, and further achieving the technical effect of improving the efficiency of determining the initial speed of the electric compressor at the current moment.

[0126] In an embodiment of the present invention, when controlling the temperature of the vehicle, the initial speed of the electric compressor at the current moment can be determined. According to the refrigeration working condition of the vehicle, the determined initial speed is adjusted to obtain the target speed. In the process of the electric compressor running at the target speed, the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve can be determined. According to the determined first attribute information and the second attribute information, the temperature of the vehicle can be controlled. Since in the embodiment of the present application, according to the refrigeration working condition of the vehicle, the initial speed of the electric compressor at the current moment is adjusted to obtain the target speed, in the process of the electric compressor running at the target speed, the first opening of the battery electronic expansion valve at the target moment and the second opening of the air-conditioning electronic expansion valve at the target moment can be determined, and according to the determined opening, the temperature of the vehicle can be controlled, thereby achieving the purpose of taking into account the cooling effect of the battery and the required temperature of the passenger compartment, thereby solving the technical problem of poor refrigeration effect of the vehicle, and then achieving the technical effect of improving the refrigeration effect of the vehicle.

[0127] The technical solution of the embodiment of the present invention is illustrated below in conjunction with preferred implementation modes.

[0128] At present, for new energy vehicles using liquid-cooled batteries, the battery cooling and passenger compartment air conditioning refrigeration generally share the same compressor. If the battery needs to be cooled and the passenger compartment air conditioning also needs to be cooled, the passenger compartment air conditioning refrigeration is often directly cut off to allow the battery to cool down quickly.

[0129] However, the above-mentioned cut-off method will make it difficult to ensure the temperature of the passenger compartment, thereby causing a technical problem of poor cooling effect of the vehicle.

[0130] However, an embodiment of the present invention proposes a vehicle temperature control method. According to the refrigeration condition of the vehicle, the initial speed of the electric compressor at the current moment is adjusted to obtain a target speed. During the operation of the electric compressor at the target speed, the first opening of the battery electronic expansion valve at the target moment and the second opening of the air-conditioning electronic expansion valve at the target moment can be determined, and the temperature of the vehicle can be controlled based on the above-mentioned determined openings, thereby achieving the purpose of taking into account both the cooling effect of the battery and the required temperature of the passenger compartment, thereby solving the technical problem of poor refrigeration effect of the vehicle, and further achieving the technical effect of improving the refrigeration effect of the vehicle.

[0131] In the relevant technology, refrigeration conditions can be divided into the following types:

[0132] Working condition 1: Only the passenger compartment air conditioner has cooling demand: The compressor is usually controlled with the target evaporator temperature (Te) as the control target (some automobile OEMs also use the target air conditioner outlet temperature as the control target. The air temperature and Te are actually strongly correlated during cooling, and the two are essentially the same); the air conditioner electronic expansion valve (AcEXV) is controlled based on the target superheat of the refrigerant at the evaporator outlet, and the battery electronic expansion valve (BatEXV) is closed;

[0133] Condition 2: Only the battery needs cooling: The compressor is usually controlled based on the temperature (Tin) of the coolant at the water inlet of the battery pack; BatEXV is controlled based on the target superheat of the refrigerant at the outlet of Chiller, and AcEXV is closed;

[0134] In working condition three, the battery needs to be cooled, and the air conditioning in the passenger compartment needs to be cooled at the same time. The conventional practice is that the compressor is still controlled according to working condition one to ensure the comfort of the air conditioning in the passenger compartment. Both AcEXV and BatEXV control their own overheating. Obviously, the temperature (Tin) of the coolant at the water inlet of the battery pack is uncontrolled at this time; this method is affected by the size of the cooling demand of the air conditioning in the passenger compartment. When the air conditioning cooling demand is not large, even if the battery electronic expansion valve (BatEXV) is continuously increased due to the large overheating of the Chiller outlet, the temperature (Tin) of the coolant at the water inlet of the battery pack often does not drop to the target water temperature, resulting in poor battery cooling performance. When the air conditioning cooling demand is large, the phenomenon of low Tin will also occur. Tin under this method is in an uncontrolled state, and it is even more impossible to guarantee the cooling capacity when the battery has a large cooling demand.

[0135] It should be noted that for working condition 3, some OEMs directly close the air conditioning electronic expansion valve (AcEXV) during battery supercharging, that is, do not provide air conditioning for the passenger compartment, and the compressor is controlled according to working condition 2; this is to allocate all the cooling capacity to the battery, and more importantly, during supercharging, the compressor stabilizes the temperature (Tin) of the coolant at the water inlet of the battery pack, and the electric compressor (ECP) rotates at a very high speed. If the air conditioning electronic expansion valve (AcEXV) on the passenger compartment air conditioning side does not adopt a special control method for working condition 3, it will cause the evaporator temperature sensor (Te) to drop rapidly or even freeze, so some OEMs directly cut off the air conditioning refrigeration. At this time, there is no air conditioning refrigeration available in the passenger compartment, resulting in poor cooling effect of the vehicle.

[0136] In this embodiment, for the above-mentioned different refrigeration conditions, the temperature of the vehicle's battery and the temperature of the air conditioner can be controlled by the vehicle's refrigeration control system. For example, FIG. 2(a) is a schematic diagram of a refrigeration control system for a vehicle according to an embodiment of the present invention. As shown in FIG. 2(a), the system may include: an electric compressor 201, a condenser 202, a cooling fan 203, an air conditioning electronic expansion valve 204, an evaporator 205, a blower 206, a battery electronic expansion valve 207, a refrigerator 208, a battery pack 209, and an electric water pump 210. Among them, the electric compressor 201 can be connected to the condenser 202, the cooling fan 203 can be installed at the condenser 202, the air conditioning electronic expansion valve 204 can be installed between the condenser 202 and the evaporator 205, the blower 206 can be installed at the evaporator 205, the battery electronic expansion valve 207 can be installed between the condenser 202 and the refrigerator 208, the battery pack 209 can be connected to the refrigerator 208, and the electric water pump 210 can also be connected to the refrigerator 208.

[0137] In this embodiment, in the system shown in FIG. 2(a), the control of the following devices is involved: an electric compressor, an air-conditioning electronic expansion valve, and a battery electronic expansion valve. The electric compressor, the air-conditioning electronic expansion valve, and the battery electronic expansion valve can all be controlled by a thermal management controller (Thermal Management Unit, referred to as TMU). Among them, the TMU generally communicates with the ECP through a local interconnect network (Local Interconnect Network, referred to as LIN) / controller area network (Controller Area Network, referred to as CAN), and directly sends the target speed of the ECP, and the ECP will stabilize its speed near the target speed. The thermal management controller TMU can calculate the target speed of the ECP based on the water temperature Tin control and adopt an incremental PI algorithm, wherein the calculation formula is shown in the following formula (1):

[0138] n_k=n_k-1+△Tin_k*I+(△Tin_k-△Tin_k-1)*P (1)

[0139] Among them, n_k can be used to represent the speed of the electric compressor in this operation cycle (also known as the initial speed), n_k-1 can be used to represent the speed of the electric compressor in the previous operation cycle (also known as the historical speed), the unit is rpm, △Tin_k can be used to represent the △Tin of this operation cycle, △Tin_k-1 can be used to represent the △Tin of the previous operation cycle, the unit is degC. △Tin = actual Tin - target Tin. In order to avoid frequent jitter of △Tin_k due to analog acquisition, it can be rounded with a hysteresis of 0.1 degrees Celsius (degC). The method is as follows:

[0140] Assume: △Tin=△Tin1+△Tin2, △Tin1 can be used to represent the value of △Tin_k with an accuracy of 0.1degC or above, and △Tin2 represents the value of △Tin_k with an accuracy of 0.01degC or below:

[0141] If △Tin2 is greater than the hysteresis interval of (0.3, 0.7) degC, let △Tin_k = △Tin1 + 0.1 degC;

[0142] If △Tin2 is smaller than the hysteresis interval of (0.3, 0.7) degC, let △Tin_k = △Tin1;

[0143] It should be noted that the I in the incremental PI algorithm represents the I value of the incremental PI, in units of rpm / degC, which needs to be obtained based on system test calibration. Since the ECP speed is inversely proportional to Tin, I is a positive value. The P in the incremental PI algorithm represents the P value of the incremental PI, in units of rpm / degC, which needs to be obtained based on system test calibration. Since the ECP speed is inversely proportional to Tin, P is a positive value. The above formula (1) is calculated once in each controller operation cycle. In order to avoid frequent accumulation of △Tin_k*I, the interval time Ti_I of I calculation can be set, that is, △Tin_k*I is calculated once every Ti time interval, and the I calculation in the formula is ignored at other times.

[0144] In this embodiment, the speed of the electric compressor can be quickly adjusted by:

[0145] Method 1: When entering working condition 3 from working condition 1, k1*n_k is directly and slowly superimposed on the current n_k based on test experience. Among them, K1 can be 0.4-0.6 (for example, K1 can be adjusted in combination with the current Tin or △Tin), thereby avoiding the rapid drop of the evaporator temperature sensor (Te) due to the intervention of battery cooling and accelerating the battery cooling speed. It should be noted that the superposition of K1*n_k should be slow, and the actual opening degree of the battery electronic expansion valve (BatExv) should be considered to avoid excessive pressure P0;

[0146] Method 2: When entering working condition 3 from working condition 2, directly and slowly superimpose k2*n_k on the current n_k based on test experience. K2 is generally set to 0.3-0.4 (for example, K2 is adjusted in combination with the current cooling demand of the passenger compartment air conditioner). This can avoid the rapid drop in the coolant temperature (Tin) at the water inlet of the battery pack due to the intervention of air conditioning refrigeration, and can also speed up the cooling speed of the air conditioner. It should be noted that the superposition of K2*n_k should be slow, and the actual opening degree of the air conditioning electronic expansion valve (AcExv) should be considered to avoid causing P0 to be too large.

[0147] Method three, when the refrigeration system is not started and directly enters working condition three, n_k can be directly assigned an initial value, that is, n_k = n_ini is immediately set after entering this working condition, and then the incremental PI closed-loop control is entered. n_ini = n_ini1 + n_ini2, where n_ini1 is obtained by looking up the calibration table according to the cooling demand of the passenger compartment air conditioner, and n_ini2 is obtained by looking up the calibration table according to the temperature (Tin) or △Tin of the coolant at the water inlet of the current battery pack.

[0148] Furthermore, the thermal management controller's speed control of the ECP must also take into account the limitations of the vehicle's noise, vibration and harshness (NVH) on the noise and resonance of the electric compressor, as well as the limitations of the vehicle's electric power on the refrigeration system.

[0149] In this embodiment, based on the rotational speed of the electric compressor, the first opening of the battery electronic expansion valve can be determined, and the opening of the battery electronic expansion valve can be adjusted to the first opening, and the second opening of the air-conditioning electronic expansion valve can be determined, and the opening of the air-conditioning electronic expansion valve can be adjusted to the second opening.

[0150] The above-mentioned determination of the first opening degree of the battery electronic expansion valve can be completed by the following steps:

[0151] After the activation of working condition three, the electric compressor starts and the cooling power gradually increases. The thermal management controller should first perform initial control on BatEXV to accelerate the establishment of system cooling efficiency:

[0152] In the first Ti_BatExvIni (for example, 60 to 90 seconds) after the activation of the third working condition, that is, the initial control of BatEXV is activated, and after the timing reaches Ti_BatExvIni, the initial control of BatEXV is terminated and the BatEXV closed-loop regulation is entered; however, if the Chiller outlet superheat is less than a certain value (for example, 10 degC to 15 degC) and continues to decrease during the first Ti_BatExvIni period, the TMU will control the exit of the initial control of BatEXV and enter the BatEXV closed-loop regulation, otherwise the superheat may be close to 0, resulting in no superheat;

[0153] During the initial control of BatEXV, TMU should control BatEXV to maintain an opening (that is, a certain number of steps) and keep it still. This number of steps should be obtained by checking the calibration table at the time of entering the initial control. This table should be based on the temperature (Tin) or △Tin of the coolant at the water inlet of the current battery pack to find a starting number of BatEXV steps. For working conditions with large battery cooling requirements, the compressor speed will generally be pulled up to a higher speed in a short time. Correspondingly, the initial number of steps of BatEXV should also be larger to avoid a high P0;

[0154] After entering the closed-loop regulation of BatEXV, the opening of BatEXV is adjusted based on the superheat at the Chiller outlet: first, the actual superheat at the Chiller outlet is calculated as SH_Chiller_Act = Tr1 - the saturated temperature of the refrigerant at the Chiller outlet, where the saturated temperature can be obtained by looking up the "saturated pressure-temperature" table of the refrigerant according to P1; given a fixed target superheat SH_Chiller_Trgt (for example, 5 degC), the superheat difference at the Chiller outlet can be obtained according to the following formula (2):

[0155] △SH_Chiller=SH_Chiller_Act-SH_Chiller_Trgt (2)

[0156] On the basis of obtaining △SH_Chiller, according to the mapping relationship in Table 1 below, Step_BatExvChk can be obtained. Substituting the obtained Step_BatExvChk into the following formula (3), the first opening of the battery electronic expansion valve can be determined:

[0157] Step_k_BatExvChk= Step_k-1_BatExvChk+Step_BatExvChk (3)

[0158] Among them, Step_k_BatExvChk can be used to represent the target opening of BatEXV calculated this time (also known as the current step number of BatEXV), and Step_k-1_BatExvChk can be used to represent the historical opening of BatEXV calculated last time (also known as the historical step number of BatEXV). There is a large hysteresis relationship between the BatEXV opening and SH_Chiller_Act, so the time interval Ti_BatExvChk is set. Every interval Ti_BatExvChk, the Step_k_BatExvChk value is updated according to formula (3). Ti_BatExvChk is generally given as 5s to 15s, and this interval time can be adjusted according to the size of △SH_Chiller.

[0159] The above-mentioned determination of the second opening degree of the air-conditioning electronic expansion valve can be completed by the following steps:

[0160] Under working condition three, due to the large cooling demand on the battery side, according to the method introduced in the above ECP control part, the compressor and refrigerant flow will be controlled very large. At this time, the AcEXV opening should be carefully controlled to avoid the actual superheat SH_Evap_Act at the evaporator outlet being too low; the thermal management controller (TMU) generally controls AcEXV directly through LIN communication or through the stepper motor driver chip to achieve the function of controlling the number of steps of this EXV;

[0161] In this embodiment, the actual temperature of the refrigerant at the evaporator outlet and the saturation temperature of the refrigerant at the evaporator outlet are calculated to obtain the difference between the actual temperature and the saturation temperature. The difference between the actual temperature and the saturation temperature is determined as the second actual superheat at the outlet of the evaporator, that is, SH_Evap_Act = Tr2 - the saturation temperature of the refrigerant at the evaporator outlet;

[0162] When the refrigeration system is normal, the compressor inlet refrigerant pressure (that is, P1) should be around 2bar to 3bar, and the corresponding refrigerant saturation temperature (based on automotive R134a refrigerant) should not be higher than 0.6degC, while the general target Te is above 3degC (in the refrigeration system, Te is slightly lower than Tr2). Therefore, basically, AcExv can be controlled based only on the evaporator temperature sensor (Te) without considering SH_Evap_Act (actual superheat). By adjusting AcEXV, the actual Te is stabilized near the target Te. At this time, while ensuring the air conditioning comfort of the passenger compartment, the phenomenon of low superheat can be avoided, and the problem of low Te and evaporator icing can also be avoided. However, on this basis, a bottom-line insurance still needs to be added, that is, when SH_Evap_Act is less than the hysteresis interval of [2, 5]degC, the superheat is already low at this time, and the AcExv control based on Te should be terminated, and the superheat control of AcExv should be activated;

[0163] After the activation of working condition three, the electric compressor starts and the cooling power gradually increases. The TMU should first perform initial control on AcEXV to accelerate the establishment of the system cooling efficiency and make the temperature sensor (Te) of the evaporator drop rapidly to avoid the algorithm of "controlling AcEXV based on Te" accumulating large control errors when Te is large.

[0164] In the first Ti_AcExvIni (generally 60s to 90s) after the activation of the third working condition, that is, the initial control of AcEXV is activated. After the timing reaches Ti_AcExvIni, the initial control of AcEXV is terminated and the normal regulation of AcEXV is entered; but if the superheat at the outlet of SH_Evap_Act is less than a certain value (for example, 10degC to 15degC) and continues to decrease during the first Ti_AcExvIni, the TMU will control the exit of the initial control of AcEXV and enter the normal regulation of AcEXV, otherwise the superheat may be close to 0, resulting in no superheat;

[0165] During the initial control of AcEXV, TMU shall control AcEXV to maintain an opening (a certain number of steps) and keep it still. This number of steps shall be obtained by looking up the calibration table at the moment of entering the initial control. This table shall realize the query of a starting number of AcEXV steps based on the current Te or △Te, and may also consider conditions such as the temperature in the passenger compartment, the ambient temperature or the light (△Te = target Te-actual Te, the target Te is obtained according to the air conditioning comfort algorithm, generally in the range of 3degC to 12degC);

[0166] After entering the AcEXV control based on Te, the opening of AcEXV is adjusted based on △Te according to the following formula (4):

[0167] Step_k_AcExvChk=Step_k-1_AcExvChk+Step_AcExvChk (4)

[0168] Among them, Step_k_AcExvChk can be used to represent the target opening of AcEXV calculated this time (also known as the current step number of AcEXV), and Step_k-1_AcExvChk can be used to represent the target opening of AcEXV calculated last time (also known as the historical step number of AcEXV). Step_AcExvChk can be obtained by looking up Table 2 below. Its table lookup logic is similar to that of incremental PI, and the method is as follows ("E" in Table 2 can represent Te). There is a large hysteresis relationship between the opening of AcEXV and the temperature of the evaporator, so the time interval Ti_AcExvChk is set. Every interval Ti_AcExvChk, the Step_k_AcExvChk value is updated according to formula (4); Ti_AcExvChk is generally given as 5s to 15s, and this interval time can be adjusted according to the size of △Te.

[0169] Table 1 Mapping relationship Table 1

[0170]

[0171] Table 2 Mapping relationship Table 2

[0172]

[0173] In this embodiment, the vehicle can upload the initial speed of the electric compressor at the current moment to the server, so that the server can adjust the initial speed based on the refrigeration condition of the vehicle to obtain the target speed, and in the process of the electric compressor running at the target speed, the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve can be determined. Figure 2(b) is a schematic diagram of data interaction between a vehicle and a server according to an embodiment of the present invention. As shown in Figure 2(b), the vehicle 220 can upload the initial speed to the server 221, and the server 221 can determine the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve, and send the first attribute information and the second attribute information to the vehicle 220.

[0174] In this embodiment, according to the refrigeration condition of the vehicle, the initial speed of the electric compressor at the current moment is adjusted to obtain the target speed. During the operation of the electric compressor at the target speed, the first opening of the battery electronic expansion valve at the target moment and the second opening of the air-conditioning electronic expansion valve at the target moment can be determined, and according to the above-mentioned determined openings, the temperature of the vehicle can be controlled, thereby achieving the purpose of taking into account both the cooling effect of the battery and the required temperature of the passenger compartment, thereby solving the technical problem of poor refrigeration effect of the vehicle, and further achieving the technical effect of improving the refrigeration effect of the vehicle.

[0175] According to another aspect of the embodiment of the present invention, corresponding to the embodiment of the temperature control method of the vehicle, the present specification also provides a temperature control device for a vehicle, and a refrigeration control system can be provided by the vehicle, and the refrigeration control system can at least include an electric compressor, a battery electronic expansion valve and an air conditioning electronic expansion valve. Figure 3 is a structural block diagram of a flow detection device for an exhaust gas recirculation system in a vehicle according to an embodiment of the present invention. Figure 3 As shown, the temperature control device 300 of the vehicle may include: a first determination unit 302 , an adjustment unit 304 , a second determination unit 306 and a control unit 308 .

[0176] The first determining unit 302 is used to determine the initial rotation speed of the electric compressor at a current moment.

[0177] The adjustment unit 304 is used to adjust the initial speed based on the cooling condition of the vehicle to obtain a target speed.

[0178] The second determination unit 306 is used to determine the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve during the operation of the electric compressor at the target speed, wherein the first attribute information is used to indicate the first opening of the battery electronic expansion valve at the target time, and the second attribute information is used to indicate the second opening of the air-conditioning electronic expansion valve at the target time, and the target time is later than the current time.

[0179] The control unit 308 is used to control the temperature of the vehicle based on the first attribute information and the second attribute information.

[0180] Optionally, the refrigeration condition includes the historical refrigeration condition of the vehicle at a historical moment and the current refrigeration condition of the vehicle at a current moment, the historical moment being earlier than the current moment. The adjustment unit 304 may include: a first determination module, used to determine the weight of the initial speed based on the historical refrigeration condition and the current refrigeration condition, wherein the weight is used to indicate the amplitude of adjusting the initial speed; an adjustment module, used to adjust the initial speed based on the weight to obtain a target speed.

[0181] Optionally, the first determination module may include: a first determination submodule, for determining a weight as a first weight based on an actual temperature of the coolant at a water inlet of a power supply device of the vehicle in response to a historical refrigeration condition being a first historical refrigeration condition and a current refrigeration condition being a first current refrigeration condition, wherein the first historical refrigeration condition is used to indicate a condition in which the refrigeration device of the vehicle has a refrigeration demand at a historical moment, and the first current refrigeration condition is used to indicate a condition in which the power supply device and the refrigeration device have a refrigeration demand at the current moment; a second determination submodule, for determining a weight as a first weight in response to a historical refrigeration condition being a second historical refrigeration condition and a current refrigeration condition being a first current refrigeration condition. The current refrigeration condition is determined to have a second weight based on the temperature to which the vehicle's refrigeration equipment is to be adjusted, wherein the second historical refrigeration condition is used to indicate a condition in which the vehicle's power supply equipment had a refrigeration demand at a historical moment; a third determination submodule is used to determine a weight as a third weight in response to the historical refrigeration condition being the third historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the temperature to which the vehicle's refrigeration equipment is to be adjusted, wherein the third historical refrigeration condition is used to indicate a condition in which the power supply equipment and the refrigeration equipment did not have a refrigeration demand at a historical moment.

[0182] Optionally, the adjustment module may include: a first superposition submodule, used to determine a first product between the first weight and the initial speed in response to the weight being the first weight, superimpose the first product with the initial speed to obtain a target speed; a second superposition submodule, used to determine a second product between the second weight and the initial speed in response to the weight being the second weight, superimpose the second product with the initial speed to obtain a target speed; and an assignment submodule, used to assign the third weight to the initial speed in response to the weight being the third weight, to obtain a target speed.

[0183] Optionally, the second determination unit 306 may include: a second determination module, used to determine a first actual superheat of the outlet of the refrigerator in the refrigeration control system during the operation of the electric compressor at the target speed; a third determination module, used to determine a first difference between the first actual superheat and the target superheat of the outlet of the refrigerator; a fourth determination module, used to determine a first adjustment parameter corresponding to the first difference from a first target database, wherein the first target database includes a mapping relationship between different first differences and different first adjustment parameters, and the first adjustment parameter is used to adjust the opening of the valve of the battery electronic expansion valve; a fifth determination module, used to determine a first sum between the first adjustment parameter and the first historical opening of the valve of the battery electronic expansion valve at a historical moment in response to the opening moment of the valve of the battery electronic expansion valve reaching a first update moment, and update the first sum to the first opening in the first attribute information, wherein the historical moment is earlier than the current moment.

[0184] Optionally, the second determination unit 306 may include: a sixth determination module, used to determine the actual surface temperature of the evaporator in the refrigeration control system and the second actual superheat of the evaporator outlet during the operation of the electric compressor at the target speed; a seventh determination module, used to determine the second opening degree in the second attribute information based on the actual temperature and the second actual superheat.

[0185] Optionally, the seventh determination module may include: a fourth determination submodule, used to determine the second opening degree in the second attribute information based on the second actual superheat in response to the second actual superheat being lower than any target superheat in the target superheat interval during the process of controlling the temperature of the vehicle's refrigeration equipment based on the actual temperature.

[0186] Optionally, the control unit 308 may include: a first adjustment module, used to adjust the temperature of the vehicle's power supply equipment from a first historical temperature to a first target temperature in response to the valve opening of the battery electronic expansion valve being the first opening in the first attribute information, wherein the first historical temperature is used to represent the historical temperature of the power supply equipment at a historical moment, and the first target temperature is used to represent the target temperature of the power supply equipment at a target moment; a second adjustment module, used to adjust the temperature of the vehicle's refrigeration equipment from a second historical temperature to a second target temperature in response to the valve opening of the air-conditioning electronic expansion valve being the second opening in the second attribute information, wherein the second historical temperature is used to represent the historical temperature of the refrigeration equipment at a historical moment, and the second target temperature is used to represent the target temperature of the refrigeration equipment at the target moment.

[0187] Optionally, the first determination unit 302 may include: an eighth determination module, used to determine the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment, and the target temperature of the coolant at the water inlet of the vehicle's power supply equipment; a prediction module, used to input the actual temperature, the target temperature and the historical speed of the electric compressor at a historical moment into a speed prediction model for prediction to obtain an initial speed, wherein the speed prediction model is generated based on a proportional-integral algorithm.

[0188] In this embodiment, the following units are provided in the temperature control device of the vehicle: a first determination unit, used to determine the initial speed of the electric compressor at the current moment; an adjustment unit, used to adjust the initial speed based on the refrigeration condition of the vehicle to obtain a target speed; a second determination unit, used to determine the first attribute information of the battery electronic expansion valve and the second attribute information of the air-conditioning electronic expansion valve during the operation of the electric compressor at the target speed, wherein the first attribute information is used to indicate the first opening of the battery electronic expansion valve at the target moment, and the second attribute information is used to indicate the second opening of the air-conditioning electronic expansion valve at the target moment, the target moment being later than the current moment; a control unit, used to control the temperature of the vehicle based on the first attribute information and the second attribute information, thereby achieving the purpose of taking into account both the cooling effect of the battery and the required temperature of the passenger compartment, thereby solving the technical problem of poor refrigeration effect of the vehicle, and further achieving the technical effect of improving the refrigeration effect of the vehicle.

[0189] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium including a stored executable program, wherein when the executable program runs, the device where the storage medium is located is controlled to execute any one of the above methods.

[0190] According to another aspect of an embodiment of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, any one of the above methods is implemented.

[0191] According to another aspect of an embodiment of the present invention, a vehicle is provided, including: a memory storing an executable program; and a processor running the program, wherein the program executes any one of the above methods when running.

[0192] Figure 4 is a structural block diagram of a vehicle according to an embodiment of the present invention. Figure 4 As shown, the components of the vehicle 400 include but are not limited to a memory 410 and a processor 420. The processor 420 is connected to the memory 410 via a bus 430, and the database 450 is used to store data.

[0193] The vehicle 400 may also include an access device 440 that enables the vehicle 400 to communicate via one or more networks 460. Examples of these networks include a Public Switched Telephone Network (PSTN), a Local Area Network (LAN), a Wide Area Network (WAN), a Personal Area Network (PAN), or a combination of communication networks such as the Internet. The access device 440 may include one or more of any type of network interface (e.g., a network interface controller (NIC)) of wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a Worldwide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a Universal Serial Bus (USB) interface, a cellular network interface, a Bluetooth interface, a Near Field Communication (NFC) interface, and the like.

[0194] In one embodiment of the present disclosure, the above components of the vehicle 400 and Figure 4 Other components not shown in the figure may also be connected to each other, for example, via a bus. It should be understood that Figure 4 The vehicle structure block diagram shown is only for the purpose of illustration, and is not intended to limit the scope of the present disclosure. Those skilled in the art may add or replace other components as needed.

[0195] It should be noted that the serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0196] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0197] In the several embodiments provided by the present invention, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of units can be a logical function division, and there can be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0198] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0199] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0200] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, referred to as Read-Only Memory), random access memory (RAM, referred to as Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc., which can store program code.

[0201] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A vehicle temperature control method, characterized in that: A refrigeration control system is provided by a vehicle, the refrigeration control system at least comprising an electric compressor, a battery electronic expansion valve and an air conditioning electronic expansion valve, the method comprising: Determining the initial rotation speed of the electric compressor at the current moment; Based on the cooling condition of the vehicle, adjusting the initial speed to obtain a target speed; During the operation of the electric compressor at the target speed, determining first attribute information of the battery electronic expansion valve and second attribute information of the air conditioner electronic expansion valve, wherein the first attribute information is used to indicate a first opening of the battery electronic expansion valve at a target time, and the second attribute information is used to indicate a second opening of the air conditioner electronic expansion valve at the target time, and the target time is later than the current time; Based on the first attribute information and the second attribute information, the temperature of the vehicle is controlled.

2. The method according to claim 1, characterized in that The cooling condition includes a historical cooling condition of the vehicle at a historical moment and a current cooling condition of the vehicle at the current moment, wherein the historical moment is earlier than the current moment, and based on the cooling condition of the vehicle, adjusting the initial speed to obtain a target speed includes: Determining a weight of the initial speed based on the historical refrigeration operating conditions and the current refrigeration operating conditions, wherein the weight is used to represent a magnitude of adjusting the initial speed; Based on the weight, the initial rotation speed is adjusted to obtain the target rotation speed.

3. The method according to claim 2, characterized in that Determining the weight of the initial speed based on the historical refrigeration working condition and the current refrigeration working condition includes: In response to the historical refrigeration condition being the first historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, the weight is determined to be the first weight based on the actual temperature of the coolant at the water inlet of the power supply device of the vehicle, wherein the first historical refrigeration condition is used to indicate a condition in which the refrigeration device of the vehicle has a refrigeration demand at the historical moment, and the first current refrigeration condition is used to indicate a condition in which the power supply device and the refrigeration device have a refrigeration demand at the current moment; In response to the historical refrigeration operating condition being a second historical refrigeration operating condition and the current refrigeration operating condition being the first current refrigeration operating condition, determining the weight to be a second weight based on the temperature to which the refrigeration equipment of the vehicle is to be adjusted, wherein the second historical refrigeration operating condition is used to indicate an operating condition in which the power supply equipment of the vehicle has a refrigeration demand at the historical moment; In response to the historical refrigeration condition being the third historical refrigeration condition and the current refrigeration condition being the first current refrigeration condition, the weight is determined to be the third weight based on the actual temperature of the coolant at the water inlet of the vehicle's power supply equipment and the temperature to which the vehicle's refrigeration equipment is to be adjusted, wherein the third historical refrigeration condition is used to indicate a condition in which the power supply equipment and the refrigeration equipment do not have a refrigeration demand at the historical moment.

4. The method according to claim 3, characterized in that: Adjusting the initial speed based on the weight to obtain the target speed includes: In response to the weight being the first weight, determining a first product between the first weight and the initial rotational speed, and superimposing the first product and the initial rotational speed to obtain the target rotational speed; In response to the weight being the second weight, determining a second product between the second weight and the initial speed, and superimposing the second product and the initial speed to obtain the target speed; In response to the weight being the third weight, the third weight is assigned to the initial rotational speed to obtain the target rotational speed.

5. The method according to claim 1, characterized in that In the process of the electric compressor running at the target speed, determining the first attribute information of the battery electronic expansion valve includes: determining a first actual superheat at an outlet of a refrigerator in the refrigeration control system during operation of the electric compressor at the target speed; determining a first difference between the first actual superheat and a target superheat at an outlet of the refrigerator; Determine a first adjustment parameter corresponding to the first difference from a first target database, wherein the first target database includes a mapping relationship between different first differences and different first adjustment parameters, and the first adjustment parameter is used to adjust the opening degree of the valve of the battery electronic expansion valve; In response to the opening time of the battery electronic expansion valve reaching a first update time, a first sum between the first adjustment parameter and the first historical opening of the battery electronic expansion valve at a historical moment is determined, and the first sum is updated to the first opening in the first attribute information, wherein the historical moment is earlier than the opening time.

6. The method according to claim 1, characterized in that In the process of the electric compressor running at the target speed, determining the second attribute information of the air-conditioning electronic expansion valve includes: During the operation of the electric compressor at the target speed, determining an actual temperature of the surface of the evaporator in the refrigeration control system and a second actual superheat degree at the outlet of the evaporator; Based on the actual temperature and the second actual superheat degree, a second opening degree in the second attribute information is determined.

7. The method according to claim 6, characterized in that Determining a second opening degree in the second attribute information based on the actual temperature and the second actual superheat degree includes: In the process of controlling the temperature of the refrigeration device of the vehicle based on the actual temperature, in response to the second actual superheat being lower than any target superheat in the target superheat range, the second opening degree in the second attribute information is determined based on the second actual superheat.

8. The method according to any one of claims 1 to 7, characterized in that Controlling the temperature of the vehicle based on the first attribute information and the second attribute information includes: In response to the valve opening of the battery electronic expansion valve being the first opening in the first attribute information, adjusting the temperature of the power supply device of the vehicle from a first historical temperature to a first target temperature, wherein the first historical temperature is used to represent the historical temperature of the power supply device at a historical moment, and the first target temperature is used to represent the target temperature of the power supply device at the target moment; In response to the valve opening of the air-conditioning electronic expansion valve being the second opening in the second attribute information, the temperature of the vehicle's refrigeration equipment is adjusted from a second historical temperature to a second target temperature, wherein the second historical temperature is used to represent the historical temperature of the refrigeration equipment at the historical moment, and the second target temperature is used to represent the target temperature of the refrigeration equipment at the target moment.

9. The method according to any one of claims 1 to 7, characterized in that: Determining the initial speed of the electric compressor at the current moment includes: Determining an actual temperature of the coolant at a water inlet of the power supply equipment of the vehicle and a target temperature of the coolant at the water inlet of the power supply equipment of the vehicle; The actual temperature, the target temperature and the historical speed of the electric compressor at a historical moment are input into a speed prediction model for prediction to obtain the initial speed, wherein the speed prediction model is generated based on a proportional-integral algorithm.

10. A temperature control device for a vehicle, characterized in that: A refrigeration control system is provided by a vehicle, the refrigeration control system at least comprising an electric compressor, a battery electronic expansion valve and an air conditioning electronic expansion valve, the device comprising: A first determining unit, used to determine an initial rotation speed of the electric compressor at a current moment; An adjustment unit, configured to adjust the initial speed based on a cooling condition of the vehicle to obtain a target speed; a second determining unit, configured to determine, during the operation of the electric compressor at a target speed, first attribute information of the battery electronic expansion valve and second attribute information of the air conditioner electronic expansion valve, wherein the first attribute information is used to indicate a first opening of the battery electronic expansion valve at a target time, and the second attribute information is used to indicate a second opening of the air conditioner electronic expansion valve at the target time, the target time being later than the current time; A control unit is used to control the temperature of the vehicle based on the first attribute information and based on the second attribute information.

11. A processor, characterized in that: The processor is used to run a program, wherein the program, when run by the processor, executes the vehicle temperature control method according to any one of claims 1 to 9.

12. A vehicle, characterized in that: include: A memory storing an executable program; A processor is used to run the program, wherein the temperature control method for a vehicle according to any one of claims 1 to 9 is executed when the program is run.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored executable program, wherein when the executable program is run, the device where the storage medium is located is controlled to execute the vehicle temperature control method according to any one of claims 1 to 9.

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