Energy consumption determination method for vehicle air conditioner, computer-readable storage medium and vehicle

Abstract

Embodiments of the present application disclose a method for determining the energy consumption of an in-vehicle air conditioner, a computer-readable storage medium, and a vehicle. The method for determining the energy consumption of the in-vehicle air conditioner includes: dividing the operation stage of the in-vehicle air conditioner into a transition stage and a steady state stage based on the cockpit temperature information and the target set temperature information; determining the first air conditioner energy consumption in the transition stage based on the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual battery temperature; determining the second air conditioner energy consumption in the steady state stage based on the ambient temperature information where the vehicle is located; and determining the total energy consumption of the in-vehicle air conditioner based on the first air conditioner energy consumption and the second air conditioner energy consumption. The method for determining the energy consumption of the in-vehicle air conditioner provided by the embodiments of the present application can make the prediction of the vehicle's charging time and the prediction of the remaining driving range more accurate.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of vehicles, and in particular, to a method for determining the energy consumption of an in-vehicle air conditioner, a computer-readable storage medium, and a vehicle. Background Art

[0002] In the technical field of vehicles, the functions of predicting the charging time and the remaining driving range are self-evidently important for new energy vehicle users. In the charging scenario, users need to reasonably arrange their time according to the remaining charging time. If the prediction error of the remaining charging time is large, it will delay the user's travel arrangement. Similarly, when the user goes out in the vehicle, the prediction accuracy of the remaining driving range is very important for trip planning. In the above two prediction functions, the air conditioner energy consumption is crucial for predicting the remaining driving range and the charging time. Under different ambient temperatures and cell temperatures, the calculation of the air conditioner energy consumption varies greatly, and the impact on the prediction of the remaining driving range and the charging time may be as high as 50%. For example, the displayed driving range of many new energy vehicles shrinks by about 60% in the north. Users need to accurately understand the true driving range or the air conditioner power consumption of the whole vehicle, rather than relying on their own actual experience to judge. In the current vehicle technology field, the determination of the energy consumption generated by the air conditioner is inaccurate, resulting in inaccurate prediction of the vehicle's charging time and the remaining driving range. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of the present invention provides a method for determining the energy consumption of an in-vehicle air conditioner.

[0005] A second aspect of the present invention provides a computer-readable storage medium.

[0006] A third aspect of the present invention provides a vehicle.

[0007] In view of this, according to a first aspect of the embodiments of the present application, a method for determining the energy consumption of an in-vehicle air conditioner is proposed, including:

[0008] Based on the cockpit temperature information and the target set temperature information, dividing the operation stage of the in-vehicle air conditioner into a transition stage and a steady state stage;

[0009] Based on the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual battery temperature, determining the first air conditioner energy consumption in the transition stage;

[0010] Based on the ambient temperature information of the vehicle, determining the second air conditioner energy consumption in the steady state stage;

[0011] Determine the total energy consumption of the vehicle-mounted air conditioner based on the first energy consumption and the second energy consumption of the air conditioner.

[0012] In a feasible implementation, the step of dividing the operation stage of the vehicle-mounted air conditioner into a transition stage and a steady state stage based on the cockpit temperature information and the target set temperature information includes:

[0013] When the difference between the cockpit temperature information and the target set temperature information is less than the first threshold, determine that the operation stage of the vehicle-mounted air conditioner is the steady state stage; and / or

[0014] When the startup duration of the vehicle-mounted air conditioner is greater than the first duration, determine that the operation stage of the vehicle-mounted air conditioner is the steady state stage;

[0015] When the difference between the cockpit temperature information and the target set temperature information is greater than or equal to the first threshold, determine that the operation stage of the vehicle-mounted air conditioner is the transition stage; and / or

[0016] When the startup duration of the vehicle-mounted air conditioner is less than or equal to the first duration, determine that the operation stage of the vehicle-mounted air conditioner is the transition stage.

[0017] In a feasible implementation, the step of determining the first energy consumption of the air conditioner in the transition stage based on the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual battery temperature includes:

[0018] Take the difference between the target set temperature information and the cockpit temperature information as the first data, and take the difference between the battery management temperature and the actual battery temperature as the second data;

[0019] Measure the first energy consumption information when the temperature changes by 1K under different first data and second data of the vehicle;

[0020] Based on the first data, the second data, and the first energy consumption information, construct a first database related to the first data, the second data, and the first energy consumption information;

[0021] Based on the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual battery temperature, determine the first energy consumption of the air conditioner through the first database.

[0022] In a feasible implementation, the step of constructing a first database related to the first data, the second data, and the first energy consumption information based on the first data, the second data, and the first energy consumption information includes:

[0023] Taking the first data as the abscissa, the second data as the ordinate, and the first energy consumption information as the Z-axis coordinate to construct a spatial coordinate system, and obtaining the first database;

[0024] The method for determining the energy consumption of the vehicle-mounted air conditioner further includes:

[0025] Updating the first database based on the actual measured values of the vehicle's operation.

[0026] In a feasible implementation manner, the step of determining the second energy consumption of the air conditioner in the steady state stage based on the ambient temperature information of the vehicle includes:

[0027] Taking the ambient temperature information of the vehicle as the third data and the on / off state of the vehicle-mounted air conditioner as the fourth data;

[0028] Actually measuring the second energy consumption information per unit time of the vehicle under different third data and fourth data;

[0029] Based on the third data, the fourth data, and the second energy consumption information, constructing a second database related to the third data, the fourth data, and the second energy consumption information;

[0030] Determining the second energy consumption of the air conditioner based on the ambient temperature information and the duration of the vehicle-mounted air conditioner in the steady state stage.

[0031] In a feasible implementation manner, the step of constructing a second database related to the third data, the fourth data, and the second energy consumption information based on the third data, the fourth data, and the second energy consumption information includes:

[0032] Taking the third data as the abscissa, the fourth data as the ordinate, and the second energy consumption information as the Z-axis coordinate to construct a spatial coordinate system, and obtaining the second database;

[0033] The method for determining the energy consumption of the vehicle-mounted air conditioner further includes:

[0034] Updating the second database based on the actual measured values of the vehicle's operation.

[0035] In a feasible implementation manner, the operation stage of the vehicle-mounted air conditioner further includes an initialization stage, and in the case where the vehicle-mounted air conditioner is in the initialization stage:

[0036] The vehicle-mounted air conditioner operates at a preset power for a second duration to adjust the temperature in the cockpit or the temperature of the battery;

[0037] Wherein, the preset power is greater than the operating power of the vehicle-mounted air conditioner in the transition stage, the preset power is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle, and the second duration is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle;

[0038] The method for determining the energy consumption of the vehicle-mounted air conditioner further includes:

[0039] Based on the preset power and the second duration, determine the third energy consumption of the air conditioner in the initialization stage;

[0040] Based on the first energy consumption of the air conditioner, the second energy consumption of the air conditioner, and the third energy consumption of the air conditioner, determine the total energy consumption of the vehicle-mounted air conditioner.

[0041] In a feasible implementation manner, the method for determining the energy consumption of the vehicle-mounted air conditioner further includes:

[0042] Based on the total energy consumption, determine the remaining charging time and cruising range of the vehicle;

[0043] The ambient temperature information of the vehicle is collected based on a preset period;

[0044] The duration of the preset period is positively correlated with the cruising range.

[0045] According to the second aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the method for determining the energy consumption of the vehicle-mounted air conditioner as described in any of the above technical solutions is implemented.

[0046] According to the third aspect of the embodiments of the present application, a vehicle is provided, including:

[0047] A vehicle body;

[0048] A control device, the control device is connected to the vehicle body, the control device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor is used to implement the method for determining the energy consumption of the vehicle-mounted air conditioner as described in any of the above technical solutions when executing the computer program stored in the memory.

[0049] Compared with the prior art, the present invention has at least the following beneficial effects: The method for determining the energy consumption of an in-vehicle air conditioner provided in the embodiments of the present application first divides the operation stages of the in-vehicle air conditioner, and performs different energy consumption statistics based on different operation stages. Specifically, in the transition stage, based on the target set temperature information, the cabin temperature information, the battery control temperature, and the actual battery temperature, the first energy consumption of the air conditioner in the transition stage is determined; in the steady state stage, the second energy consumption of the air conditioner is determined based on the ambient temperature information where the vehicle is located. Then, based on the first energy consumption and the second energy consumption, the total energy consumption of the air conditioner is determined, which can make the determination of the energy consumption of the in-vehicle air conditioner more accurate. Then, further based on the total energy consumption, the charging time of the vehicle and the remaining driving range are determined, which can make the prediction of the charging time of the vehicle and the prediction of the remaining driving range more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0051] Figure 1 is a schematic step flow chart of the method for determining the energy consumption of the in-vehicle air conditioner provided in the embodiments of the present application;

[0052] Figure 2 is a corresponding relationship diagram between the actual power of the air conditioner and the operation duration of the air conditioner in the method for determining the energy consumption of the in-vehicle air conditioner provided in the embodiments of the present application;

[0053] Figure 3 is a corresponding relationship diagram between the actual cabin temperature and the operation duration of the air conditioner in the method for determining the energy consumption of the in-vehicle air conditioner provided in the embodiments of the present application;

[0054] Figure 4 is a corresponding relationship diagram between the actual temperature of the power battery and the operation duration of the air conditioner in the method for determining the energy consumption of the in-vehicle air conditioner provided in the embodiments of the present application;

[0055] Figure 5 is a structural block diagram of a computer-readable storage medium provided in an embodiment of the present application;

[0056] Figure 6 is a structural block diagram of a control device of a vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] To better understand the above technical solutions, the technical solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, rather than limitations on the technical solutions of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0058] As Figures 1 to 4 shown, according to the first aspect of the embodiments of the present application, a method for determining the energy consumption of a vehicle air conditioner is provided, including:

[0059] Step 101: Based on the cabin temperature information and the target set temperature information, divide the operation stage of the vehicle air conditioner into a transition stage and a steady state stage. It can be understood that when adjusting the temperature of the vehicle cabin or the battery temperature through the vehicle air conditioner, the operation power of the vehicle air conditioner is greater in the initial stage of starting the vehicle air conditioner, and the temperature of the cabin and the battery shows a changing trend. This stage is the transition stage. As the operation duration of the vehicle air conditioner increases, the temperatures of the cabin and the battery will tend to balance. In this case, the operation power of the vehicle air conditioner is relatively low, and the temperatures of the cabin and the battery are close to balance. This case is the steady state stage. It can be understood that the target set temperature information can be set by the user, or the target set temperature can also be set by the vehicle itself. When the temperature in the cabin is the target set temperature, it can make the user more comfortable.

[0060] Step 102: Based on the target set temperature information, the cabin temperature information, the battery control temperature, and the actual battery temperature, determine the first energy consumption of the air conditioner in the transition stage. When the vehicle is in the transition stage, in this case, the vehicle air conditioner needs to output a higher power to timely adjust the temperature of the cabin and the battery. Therefore, in this case, the energy consumption of the vehicle air conditioner has a high correlation with the target set temperature information, the cabin temperature information, the battery control temperature, and the actual battery temperature. Determining the first energy consumption in this stage based on the target set temperature information, the cabin temperature information, the battery control temperature, and the actual battery temperature can make the energy consumption of the vehicle air conditioner in the transition stage more accurate.

[0061] Step 103: Determine the second air - conditioning energy consumption in the steady state based on the ambient temperature information of the vehicle. It can be understood that in the steady state, the operation purpose of the in - vehicle air conditioner is to maintain the temperature in the cockpit around the target set temperature information. The main factor affecting the temperature in the cockpit is the ambient temperature information. The greater the difference between the ambient temperature information and the target set temperature information, the higher the energy consumption; the smaller the difference, the lower the energy consumption. In addition, in this case, it indicates that the vehicle has been running for a period of time, and the impact of the battery on the energy consumption of the in - vehicle air conditioner is very small. Therefore, the second energy consumption can be determined through the ambient temperature information, making the determination of the energy consumption of the in - vehicle air conditioner in the steady state more accurate.

[0062] Step 104: Determine the total energy consumption of the in - vehicle air conditioner based on the first air - conditioning energy consumption and the second air - conditioning energy consumption. It can be understood that when both the first energy consumption and the second energy consumption have been accurately determined, the total energy consumption of the in - vehicle air conditioner can be obtained by adding the two, making the determination of the total energy consumption of the in - vehicle air conditioner more accurate.

[0063] The method for determining the energy consumption of the in - vehicle air conditioner provided in the embodiments of the present application first divides the operation stages of the in - vehicle air conditioner, and based on different operation stages, different energy consumption statistics methods are used. Specifically, in the transition stage, based on the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual battery temperature, the first air - conditioning energy consumption in the transition stage is determined; in the steady state, the second air - conditioning energy consumption is determined based on the ambient temperature information of the vehicle. Then, based on the first energy consumption and the second energy consumption, the total energy consumption of the air conditioner is determined, which can make the determination of the energy consumption of the in - vehicle air conditioner more accurate. Then, further based on the total energy consumption, the charging time of the vehicle and the remaining cruising range are determined, which can make the prediction of the charging time of the vehicle and the prediction of the remaining cruising range more accurate.

[0064] It can be understood that the cockpit temperature information is the temperature information inside the cockpit of the vehicle, and the battery management temperature refers to the temperature range in which the vehicle's power battery can operate safely. When the temperature of the battery is not within this range, the in - vehicle air conditioner can intervene to adjust the temperature of the battery.

[0065] It can be understood that when the vehicle is in the non - high - voltage state (VehicleInactive), in this case, the in - vehicle air conditioner cannot be powered on, and the method for determining the energy consumption of the in - vehicle air conditioner is not enabled. When the vehicle is powered on or enters the charging state with the charging gun plugged in, the vehicle is in the high - voltage state, and the air conditioner may start to work; in the air - conditioner activation state (VehicleConditioning), the method for determining the energy consumption of the in - vehicle air conditioner in the embodiments of the present application can be enabled.

[0066] It can be understood that Figure 2 is a corresponding relationship diagram between the actual power of the air conditioner and the operation duration of the air conditioner; Figure 3It is a corresponding relationship diagram between the actual temperature of the cockpit and the operation duration of the air conditioner; Figure 4 It is a corresponding relationship diagram between the actual temperature of the power battery and the operation duration of the air conditioner; among them, the stage before the vertical line in the coordinate system is the transition stage, and the stage after the line is the steady state stage.

[0067] In some examples, the steps of dividing the operation stage of the vehicle-mounted air conditioner into a transition stage and a steady state stage based on the cockpit temperature information and the target set temperature information include: when the difference between the cockpit temperature information and the target set temperature information is less than the first threshold, determining that the operation stage of the vehicle-mounted air conditioner is the steady state stage; and / or when the opening duration of the vehicle-mounted air conditioner is greater than the first duration, determining that the operation stage of the vehicle-mounted air conditioner is the steady state stage; when the difference between the cockpit temperature information and the target set temperature information is greater than or equal to the first threshold, determining that the operation stage of the vehicle-mounted air conditioner is the transition stage; and / or when the opening duration of the vehicle-mounted air conditioner is less than or equal to the first duration, determining that the operation stage of the vehicle-mounted air conditioner is the transition stage.

[0068] In this technical solution, when the difference between the cockpit temperature information and the target set temperature information is less than the first threshold and / or when the operation duration of the vehicle-mounted air conditioner has exceeded the first duration, it can be considered that the temperature in the cockpit is already very close to the target set temperature information, and the temperature of the battery is also very close to the battery management temperature. In this case, it can be determined that the operation mode of the vehicle-mounted air conditioner is in the steady state stage.

[0069] In this technical solution, when the difference between the cockpit temperature information and the target set temperature information is greater than or equal to the first threshold and / or when the operation duration of the vehicle-mounted air conditioner has not exceeded the first duration, it can be considered that the temperature in the cockpit is not close to the target set temperature information, the vehicle-mounted air conditioner still needs to operate at a high power, and the temperature of the battery is not the battery management temperature. In this case, it can be determined that the operation mode of the vehicle-mounted air conditioner is in the transition stage.

[0070] In some examples, the steps of determining the first energy consumption of the air conditioner in the transition stage based on the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual temperature of the battery include: taking the difference between the target set temperature information and the cockpit temperature information as the first data, and taking the difference between the battery management temperature and the actual temperature of the battery as the second data; measuring the first energy consumption information when the temperature changes by 1K under different first data and second data of the vehicle; constructing a first database related to the first data, the second data, and the first energy consumption information based on the first data, the second data, and the first energy consumption information; and determining the first energy consumption of the air conditioner based on the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual temperature of the battery through the first database.

[0071] In this technical solution, a method for determining the first energy consumption is further provided. During the actual determination process, the energy consumption of the vehicle-mounted air conditioner under different working conditions of the vehicle can be first statistically analyzed. In particular, the first energy consumption information when the temperature changes by 1K is statistically analyzed under different first data and second data. Based on the measured data, a first database can be obtained. When it is necessary to determine the first energy consumption of the air conditioner, only the target set temperature information, the cockpit temperature information, the battery management temperature, and the actual battery temperature need to be brought into the first database, and then multiple first energy consumption information when the temperature changes by 1K can be obtained. By adding up the multiple first energy consumption information, the first energy consumption of the air conditioner can be obtained, making the acquisition of the first energy consumption of the air conditioner more accurate.

[0072] In some examples, the steps of constructing a first database related to the first data, the second data, and the first energy consumption information based on the first data, the second data, and the first energy consumption information include: taking the first data as the abscissa, the second data as the ordinate, and the first energy consumption information as the Z-axis coordinate to construct a spatial coordinate system, and obtaining the first database.

[0073] In this technical solution, the first database can be stored in the form of constructing a spatial coordinate system, making the corresponding relationship between the first data, the second data, and the first energy consumption information in the first database more accurate and facilitating the accurate determination of the first energy consumption of the air conditioner.

[0074] In some examples, the method for determining the energy consumption of the vehicle-mounted air conditioner further includes: updating the first database based on the actual measured values of the vehicle's operation.

[0075] In this technical solution, during the operation of the vehicle, the first data, the second data, and the first energy consumption information can also be detected in real time, and the first database can be updated in real time, enabling the first database to perform deep learning and realizing the automatic update and iteration of the first database, reducing the amount of manual participation, and making the method for determining the energy consumption of the vehicle-mounted air conditioner more simple and intelligent.

[0076] Referring to Table 1 below, it can be understood that in the transition stage: enter the transient phase of the air conditioner; in the transition stage, calculate the energy consumed when the temperature difference in the current cockpit changes by 1K and the temperature difference of the power battery changes by 1K; the temperature difference in the cockpit t_Cabin_delta = target set temperature information - cockpit temperature information; as shown in Table 1 below: when the temperature difference is between -5 and 5°C, Index_Cabin = 3; when the temperature difference is greater than 30°C, Index_Cabin = 6;

[0077] Table 1:

[0078]

[0079] Refer to Table 2 below. The temperature difference of the power battery can be divided into 3 intervals. When the power battery temperature < 0°C (TBD), then Index_HvBatt = 0; when the power battery temperature > 38°C (TBD), then Index_HvBatt = 2; in other cases, Index_HvBatt = 1, and there is no heating or cooling request for the power battery BMS for thermal management; first, integrate (Ptran - P1) according to the sampling time. When the temperature difference in the current cockpit changes by 1K or the temperature of the power battery changes by 1K, the integration is terminated. The energy W1 obtained by integration is stored in the corresponding position according to the currently divided temperature difference interval; where Ptran is the accessory power at the current moment = actual PTC power + actual EDC power + actual DCDC power; P1 is the long-term accessory power (calculated and stored in NVM in the steady state stage); the energy consumption Wtran corresponding to a 1K change in temperature difference is continuously updated and self-learned in the transientPhase. As shown in Table 2 below, this MAP value is automatically updated and learned without calibration:

[0080] Table 2

[0081]

[0082] Among them, the unit of the Z-axis in Table 2 is kw h / 100km.

[0083] In some examples, the steps to determine the second energy consumption of the air conditioner in the steady state stage based on the ambient temperature information of the vehicle include: taking the ambient temperature information of the vehicle as the third data and the on / off state of the vehicle-mounted air conditioner as the fourth data; actually measuring the second energy consumption information per unit time of the vehicle under different third data and fourth data; constructing a second database related to the third data, fourth data and the second energy consumption information based on the third data, fourth data and the second energy consumption information; determining the second energy consumption of the air conditioner based on the ambient temperature information and the duration of the vehicle-mounted air conditioner in the steady state stage.

[0084] In this technical solution, when the vehicle-mounted air conditioner is in the steady state stage, the operation purpose of the vehicle-mounted air conditioner is to maintain the temperature in the cockpit near the target set temperature information. Therefore, the operation of the vehicle-mounted air conditioner is mainly used to counter the ambient temperature. Based on this, the second energy consumption information per unit time of the vehicle under different working conditions, especially at different ambient temperatures and different start / stop states of the vehicle-mounted air conditioner, is actually measured. Then, by bringing the start / stop state of the air conditioner and the ambient temperature information of the vehicle into the second database, the second energy consumption information can be obtained. Multiplying the second energy consumption information by the driving duration of the vehicle can obtain the second energy consumption of the air conditioner, making the determination of the second energy consumption of the air conditioner more accurate.

[0085] In some examples, the steps of constructing a second database in which the third data and the fourth data are related to the second energy consumption information based on the third data, the fourth data, and the second energy consumption information include: taking the third data as the abscissa, the fourth data as the ordinate, and the second energy consumption information as the Z-axis coordinate to construct a spatial coordinate system, and obtaining the second database.

[0086] In this technical solution, the second database can be stored in the form of constructing a spatial coordinate system, so that the corresponding relationship between the third data and the fourth data and the second energy consumption information in the second database is more accurate, which is convenient for accurately determining the second energy consumption of the air conditioner.

[0087] In some examples, the method for determining the energy consumption of a vehicle-mounted air conditioner further includes: updating the second database based on the actual measured values of the vehicle operation.

[0088] In this technical solution, during the vehicle operation, the third data, the fourth data, and the second energy consumption information can also be detected in real time, and the second database can be updated in real time, so that the second database can perform deep learning, realize automatic update and iteration of the second database, reduce the amount of manual participation, and make the operation of the method for determining the energy consumption of the vehicle-mounted air conditioner simpler and more intelligent.

[0089] It can be understood that when the air conditioner control transition stage ends, it enters the air conditioner control steady state stage VehicleStaticPhase; considering the engine allowance means considering that the engine waste heat recovery at low temperature does not consume the power battery energy, so when the engine starts successfully at low temperature, the energy consumption during the air conditioner adjustment stage is not additionally calculated; in the VehicleStaticPhase stage, the energy consumption for maintaining the current cabin temperature is related to the ambient temperature. The actual ambient temperature is divided into 7 regions, as shown in Table 3 below. In Table 3, t_Env is the ambient temperature information, and Index_Env is the coordinate table corresponding to the temperature information.

[0090] Table 3

[0091]

[0092] Self-learning is performed on the air conditioner energy consumption with the air conditioner on and off at different ambient temperatures. The self-learning window is 60 min (TBD). The moving average value of the vehicle speed within 60 min and 50 km / h are taken as the maximum value within the self-learning window. When using the air conditioner under the condition of the whole vehicle being stationary and the vehicle speed being 0, the average vehicle speed stored in the NVM and 50 km / h are taken as the maximum value;

[0093] During the steady state phase of air conditioning control, the average energy consumption of the air conditioner in the VehicleStaticPhase, W2 = P2 / V1; where P2 is the moving average accessory power consumption within a 60-minute window = actual PTC power + actual EDC power + actual DCDC power; V1 is the maximum value of the moving average vehicle speed within a 60-minute window and 50 km / h; Store W2 into the Wsta MAP, as shown in Table 4 below, and this MAP continuously self-learns and updates.

[0094] Table 4

[0095]

[0096] Among them, the unit of the Z-axis in Table 4 is kw h / 100km.

[0097] Combined with Figure 3, for Table 4, when the user turns off the air conditioner and the outside ambient temperature is 20°C, query the current steady state energy consumption Wsta = 1 kwh / 100km; when the user turns on the air conditioner and the outside ambient temperature is 20°C, query the current steady state energy consumption Wsta = 2 kwh / 100km;

[0098] In the VehicleStaticPhase stage, set two interfaces for short-term and long-term air conditioner energy consumption. The short-term is a 10-minute time calculation window, and the long-term is a 60-minute time calculation window. Under different power battery SOCs, the proportionality factors for short-term and long-term air conditioner energy consumption are different, and this proportionality factor is obtained by looking up a table according to the power battery SOC; at a lower SOC, mainly use the 10-minute air conditioner energy consumption, and at a higher SOC, the proportion of the 60-minute long-term air conditioner energy consumption is larger;

[0099] In some examples, the operation stage of the vehicle air conditioner further includes an initialization stage. In the case where the vehicle air conditioner is in the initialization stage: the vehicle air conditioner operates at a preset power for a second duration to adjust the temperature in the cockpit or the temperature of the battery; where the preset power is greater than the operating power of the vehicle air conditioner in the transition stage, and the preset power is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle, and the second duration is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle; the method for determining the energy consumption of the vehicle air conditioner further includes: based on the preset power and the second duration, determining the third energy consumption of the air conditioner in the initialization stage; based on the first energy consumption of the air conditioner, the second energy consumption of the air conditioner, and the third energy consumption of the air conditioner, determining the total energy consumption of the vehicle air conditioner.

[0100] In this technical solution, during the actual operation of the vehicle, in order to adjust the temperature inside the vehicle cockpit as soon as possible and the temperature of the battery as soon as possible, the vehicle-mounted air conditioner can also have an initialization stage. In this case, the vehicle-mounted air conditioner operates at a higher power for a second duration, and the preset power is greater than the operating power of the vehicle-mounted air conditioner during the transition stage. Based on this, the temperature of the cockpit and the battery can be quickly adjusted, which can improve the user experience, the safety of vehicle operation, and the service life of the vehicle battery.

[0101] It can be understood that when the vehicle-mounted air conditioner of the vehicle also includes the initialization stage mode, it is also necessary to count the energy consumption during the initialization stage. Considering that both the operating power and the operating duration during the initialization stage are fixed, the product of the preset power and the second duration is the third energy consumption of the air conditioner. After the third energy consumption of the air conditioner is determined, the total energy consumption of the vehicle-mounted air conditioner can be determined based on the first energy consumption of the air conditioner, the second energy consumption of the air conditioner, and the third energy consumption of the air conditioner, making the determination of the total energy consumption more accurate.

[0102] It can be understood that the preset power is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle, that is, the greater the difference between the current temperature and the target set temperature, the greater the value of the preset power.

[0103] It can be understood that the second duration is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle, that is, the greater the difference between the current temperature and the target set temperature, the greater the value of the second duration.

[0104] In some examples, the control of the cockpit air conditioner and the thermal management control of the power battery need to be divided into different stages or states, such as Figure 2 As shown, after the air conditioner is turned on, it first enters the initialization stage, and the control of the air conditioner power during the initialization stage is the preset power value; for example, the initial preset PTC power of the power battery is 5kw at low temperature, and the heating time is 5 minutes; when the actual temperature of the cockpit is close to the target set temperature and the temperature of the power battery is within a suitable range (for example, [0°C, 38°C]), it enters the steady state stage. The power battery does not need to turn on thermal management, and the temperature of the cockpit remains relatively stable. The power of the air conditioner in this stage is small and is strongly related to the ambient temperature.

[0105] In some examples, the method for determining the energy consumption of the vehicle-mounted air conditioner further includes: determining the remaining charging time and cruising range of the vehicle based on the total energy consumption.

[0106] Determining the remaining charging time and cruising range of the vehicle through the total energy consumption determined by the method provided in the embodiments of the present application can make the determination of the remaining charging time and cruising range more accurate.

[0107] In some examples, the ambient temperature information of the vehicle is collected based on a preset period; the duration of the preset period is positively correlated with the cruising range.

[0108] In this technical solution, the collection timing of the ambient temperature is further provided. The ambient temperature can be collected periodically to prevent the ambient temperature of the vehicle from changing and making it impossible to accurately estimate the total energy consumption. When the remaining cruising range of the vehicle is shorter, the duration of the collection period is shorter, that is, the less remaining cruising range, the more intensive the collection of the ambient temperature, which can make the determination of the ambient temperature more accurate and the estimation of the total energy consumption more accurate; on the contrary, when the remaining range is longer, the collection period is longer, which can avoid the vehicle controller from frequently collecting ambient temperature information and reduce the amount of computation.

[0109] As Figure 5 shown, according to the second aspect of the embodiments of the present application, a computer-readable storage medium 201 is provided, on which a computer program 202 is stored. When the computer program 202 is executed by a processor, it implements the energy consumption determination method of the vehicle-mounted air conditioner according to any of the above technical solutions.

[0110] The computer-readable storage medium 201 provided by the embodiments of the present application, because it implements the energy consumption determination method of the vehicle-mounted air conditioner according to any of the above technical solutions, thus has all the beneficial effects of the above energy consumption determination method of the vehicle-mounted air conditioner.

[0111] The computer-readable storage medium provided by the embodiments of the present application first divides the operation stages of the vehicle-mounted air conditioner, and performs different energy consumption statistics methods based on different operation stages. Specifically, in the transition stage, based on the target set temperature information, the cabin temperature information, the battery management temperature, and the actual battery temperature, the first energy consumption of the air conditioner in the transition stage is determined; in the steady state stage, the second energy consumption of the air conditioner is determined based on the ambient temperature information of the vehicle. Then, based on the first energy consumption and the second energy consumption, the total energy consumption of the air conditioner is determined, which can make the determination of the energy consumption of the vehicle-mounted air conditioner more accurate. Then, based on the total energy consumption, the charging time and the remaining cruising range of the vehicle are further determined, which can make the prediction of the charging time and the remaining cruising range of the vehicle more accurate.

[0112] It can be understood that when adjusting the temperature of the vehicle cabin or the battery temperature through the vehicle-mounted air conditioner, the operating power of the vehicle-mounted air conditioner is greater at the initial stage of starting the vehicle-mounted air conditioner. The temperatures of the cabin and the battery show a changing trend. This stage is the transition stage. As the operating time of the vehicle-mounted air conditioner increases, the temperatures of the cabin and the battery will tend to balance. In this case, the operating power of the vehicle-mounted air conditioner is relatively low, and the temperatures of the cabin and the battery are close to balance. This case is the steady state stage. It can be understood that the target set temperature information can be set by the user, or the vehicle can set it by itself. When the temperature in the cabin is the target set temperature, it can make the user more comfortable.

[0113] It can be understood that when the vehicle is in the transition stage, in this case, the vehicle-mounted air conditioner needs to output a higher power to adjust the temperature of the cabin and the battery in a timely manner. Therefore, in this case, the energy consumption of the vehicle-mounted air conditioner has a high correlation with the target set temperature information, the cabin temperature information, the battery management temperature, and the actual battery temperature. Determining the first energy consumption in this stage based on the target set temperature information, the cabin temperature information, the battery management temperature, and the actual battery temperature can make the energy consumption of the vehicle-mounted air conditioner in the transition stage more accurate.

[0114] It can be understood that in the steady state stage, the operating purpose of the vehicle-mounted air conditioner is to maintain the temperature in the cabin around the target set temperature information. The main factor affecting the cabin is the ambient temperature information. The greater the difference between the ambient temperature information and the target set temperature information, the higher the energy consumption. The smaller the difference between the ambient temperature information and the target set temperature information, the lower the energy consumption. In addition, in this case, it means that the vehicle has been running for a period of time, and the influence of the battery on the energy consumption of the vehicle-mounted air conditioner is very small. Therefore, the second energy consumption can be determined through the ambient temperature information, making the determination of the energy consumption of the vehicle-mounted air conditioner in the steady state stage more accurate.

[0115] It can be understood that when both the first energy consumption and the second energy consumption have been accurately determined, adding the two together can obtain the total energy consumption of the vehicle-mounted air conditioner, making the determination of the total energy consumption of the vehicle-mounted air conditioner more accurate.

[0116] It can be understood that the cabin temperature information is the temperature information inside the vehicle cabin, and the battery management temperature refers to the temperature range in which the vehicle's power battery can operate safely. When the temperature of the battery is not within this range, the vehicle-mounted air conditioner can intervene to adjust the battery temperature.

[0117] Such as Figure 6As shown in the figure, according to the third aspect of the embodiments of the present application, a vehicle is proposed, including: a vehicle body; a control device, the control device is connected to the vehicle body, and the control device includes: a memory 501, a processor 502, and a computer program stored in the memory and operable on the processor 502. The processor 502 is configured to implement the energy consumption determination method of the vehicle-mounted air conditioner according to any of the above technical solutions when executing the computer program stored in the memory 501.

[0118] For the vehicle provided by the embodiments of the present application, since the energy consumption determination method of the vehicle-mounted air conditioner according to any of the above technical solutions is implemented, the vehicle has all the beneficial effects of the energy consumption determination method of the vehicle-mounted air conditioner in the above technical solutions, which will not be elaborated here.

[0119] For the vehicle provided by the embodiments of the present application, the control device first divides the operation stages of the vehicle-mounted air conditioner, and performs different energy consumption statistics methods based on different operation stages. Specifically, in the transition stage, based on the target set temperature information, the cabin temperature information, the battery management temperature, and the actual battery temperature, the first energy consumption of the air conditioner in the transition stage is determined; in the steady state stage, the second energy consumption of the air conditioner is determined based on the ambient temperature information where the vehicle is located. Then, based on the first energy consumption and the second energy consumption, the total energy consumption of the air conditioner is determined, which can make the determination of the energy consumption of the vehicle-mounted air conditioner more accurate. Then, based on the total energy consumption, the charging time and the remaining driving range of the vehicle are further determined, which can make the prediction of the charging time and the prediction of the remaining driving range of the vehicle more accurate.

[0120] In some examples, the vehicle may further include: a vehicle control unit (VCU), an air conditioner controller (AC), a power battery control system (BMS), a controller area network (CAN), a high-voltage to low-voltage DC conversion controller (DCDC), a positive temperature coefficient semiconductor heating device (PTC), and an electric compressor (EDC). It can be understood that the control device can be installed in the vehicle control unit.

[0121] During the vehicle operation, the AC controller inputs the ambient air temperature signal, the actual cabin temperature signal (including the actual temperature signals of the driver's seat, co-driver's seat, and rear row area), the target set temperature signal (including the set target temperature signals of the driver's seat, co-driver's seat, and rear row area), the air conditioner switch signal (including the air conditioner switch signals of the driver's seat, co-driver's seat, and rear row area), the actual compressor power (for cabin cooling or heat pump air conditioner heating scenarios or power battery cooling regulation), and the actual PTC power (for cabin or power battery low-temperature heating) through the CAN bus. The BMS controller inputs the actual power battery temperature (including the highest single-cell temperature, the lowest single-cell temperature signal, and the inlet and outlet water temperature signals) through the power CAN bus. The DCDC controller inputs the actual power consumption of low-voltage accessories (including fans, water pumps, valves, etc.) through the power CAN bus. Additionally, the vehicle speed signal used by the vehicle controller VCU to calculate the air conditioner energy consumption is obtained from the comprehensive calculation of the wheel speed sensor.

[0122] In some examples, during the process of the vehicle executing the steps of the method for determining the energy consumption of the on-vehicle air conditioner, the specific steps may include:

[0123] Step S2: The vehicle is powered on and enters the high-voltage state, and the air conditioner energy consumption calculation module is activated.

[0124] Step S3: The VCU controller obtains the ambient temperature information, the cabin temperature information, and the air conditioner start / stop status from the AC controller, obtains the highest and lowest power battery temperatures from the BMS controller, and calculates the vehicle speed internally in the VCU.

[0125] Step S4: The VCU controller determines whether the air conditioner system is faulty or whether the thermal management components are faulty. Faults in the air conditioner system include faults such as high-voltage components of the air conditioner and insufficient refrigerant pressure. In case of a fault, the air conditioner is unavailable and accurate air conditioner energy consumption information cannot be obtained.

[0126] Step S51: If the air conditioner system is faulty or the thermal management components are faulty, the air conditioner energy consumption calculation is not updated.

[0127] Step S52: If the air conditioner system is not faulty and the thermal management components are not faulty, enter the air conditioner energy consumption calculation module. First, the VCU controller calculates the temperature change inside the cabin and the temperature change of the power battery, and calculates the accessory power consumption. The accessory power consumption includes the DCDC power consumption, the actual PTC output power, and the actual EDC output power.

[0128] Step S6: Calculate the first air conditioner energy consumption during the transition stage and store it in the NVM.

[0129] Step S7: The VCU determines whether the condition (|cabin temperature - air conditioner set temperature| < 2°C and the power battery thermal management is not enabled) or the air conditioner adjustment time > 30 min is satisfied.

[0130] Step S81: If the condition is satisfied, the VCU calculates the second energy consumption of the air conditioner in the steady state stage, calculates the second energy consumption at different ambient temperatures in the steady state stage and stores it in the NVM, calculates the long-term and short-term energy consumption and average vehicle speed in the steady state stage, and stores them in the NVM;

[0131] Step S82: Otherwise, the VCU considers that the transition stage of the air conditioner startup has not ended, enters S6, and calculates the energy consumed by the cumulative change in the cockpit temperature and the energy consumed by the change in the power battery temperature;

[0132] Step S9: The VCU determines whether the vehicle powers off high voltage, whether the air conditioning system fails, or whether the thermal management components fail;

[0133] Step S100: If the condition is satisfied, the VCU ends the calculation of the air conditioner energy consumption and powers off to store relevant variables;

[0134] Step S101: Otherwise, the VCU considers that the steady state stage of the air conditioner startup has not ended, enters S8, and continues to calculate the energy consumption at different ambient temperatures and the long-term and short-term vehicle speeds.

[0135] In the embodiments of the present application, in combination with the air conditioner control principle, ambient temperature, air conditioner set temperature, power battery temperature, vehicle speed, and air conditioner power consumption, the energy consumed when the temperature in the passenger compartment rises by 1°C under the current ambient temperature, the energy consumed when the power battery cell temperature rises by 1°C, and the energy consumption of the air conditioner at different ambient temperatures in the steady state are calculated. This data is continuously updated and iteratively self-learned, without requiring a calibration engineer to spend a lot of time on calibration tests, truly enabling the energy consumption of each vehicle at different temperatures to be learned and trained; more accurate prediction of air conditioner energy consumption can improve the accuracy of the remaining driving range and remaining charging time of new energy vehicles.

[0136] In some examples, the control device may further include a user interface, a network interface, a camera, a Radio Frequency (RF) circuit, sensors, an audio circuit, a WI-FI module, etc. The user interface may include a display (Display), an input unit such as a keyboard (Keyboard), etc. Optionally, the user interface may further include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a WI-FI interface), etc.

[0137] In an exemplary embodiment, the control device may further include an input / output interface and a display device. Among them, each functional unit can complete mutual communication through a bus. The memory stores a computer program, and the processor is used to execute the program stored on the memory and execute the method in the above embodiments.

[0138] The above storage medium may further include an operating system and a network communication module. The operating system is a program for managing the hardware and software resources of the entity device of the above method, and supports the operation of the information processing program and other software and / or programs. The network communication module is used to implement communication between components inside the storage medium, as well as communication with other hardware and software in the information processing entity device.

[0139] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform, or can also be implemented by hardware.

[0140] In the present invention, the terms "first", "second", "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0141] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation of the present invention.

[0142] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0143] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for determining the energy consumption of a vehicle-mounted air conditioner, characterized in that, Including: Based on the cabin temperature information and the target set temperature information, divide the operation stage of the vehicle air conditioner into a transition stage and a steady state stage; Based on the target set temperature information, the cabin temperature information, the battery management temperature, and the actual battery temperature, determine the first energy consumption of the air conditioner in the transition stage. The specific steps include: taking the difference between the target set temperature information and the cabin temperature information as the first data, and taking the difference between the battery management temperature and the actual battery temperature as the second data; measuring the first energy consumption information when the temperature changes by 1K under different first data and second data conditions of the vehicle; based on the first data, the second data, and the first energy consumption information, construct a first database related to the first data, the second data, and the first energy consumption information; based on the target set temperature information, the cabin temperature information, the battery management temperature, and the actual battery temperature, determine the first energy consumption of the air conditioner through the first database; Based on the ambient temperature information of the vehicle, determine the second energy consumption of the air conditioner in the steady state stage; Based on the first energy consumption of the air conditioner and the second energy consumption of the air conditioner, determine the total energy consumption of the vehicle air conditioner.

2. The method for determining the energy consumption of an in-vehicle air conditioner according to claim 1, characterized in that The step of dividing the operation stage of the vehicle air conditioner into a transition stage and a steady state stage based on the cabin temperature information and the target set temperature information includes: When the difference between the cabin temperature information and the target set temperature information is less than the first threshold, determine that the operation stage of the vehicle air conditioner is the steady state stage; and / or When the opening duration of the vehicle air conditioner is greater than the first duration, determine that the operation stage of the vehicle air conditioner is the steady state stage; When the difference between the cabin temperature information and the target set temperature information is greater than or equal to the first threshold, determine that the operation stage of the vehicle air conditioner is the transition stage; and / or When the opening duration of the vehicle air conditioner is less than or equal to the first duration, determine that the operation stage of the vehicle air conditioner is the transition stage.

3. The method for determining the energy consumption of an in-vehicle air conditioner according to claim 1, wherein The step of constructing a first database related to the first data, the second data, and the first energy consumption information based on the first data, the second data, and the first energy consumption information includes: Taking the first data as the abscissa, the second data as the ordinate, and the first energy consumption information as the Z-axis coordinate to construct a space coordinate system, and obtaining the first database; The method for determining the energy consumption of the vehicle air conditioner further includes: Updating the first database based on the actual measured values of the vehicle operation.

4. The method for determining the energy consumption of an in-vehicle air conditioner according to claim 1, wherein The step of determining the second energy consumption of the air conditioner in the steady state stage based on the ambient temperature information of the vehicle includes: Taking the ambient temperature information of the vehicle as the third data and the on-off state of the vehicle air conditioner as the fourth data; Measuring the second energy consumption information per unit time under different third data and fourth data conditions of the vehicle; Based on the third data, the fourth data, and the second energy consumption information, construct a second database related to the third data, the fourth data, and the second energy consumption information; Based on the ambient temperature information and the duration of the vehicle air conditioner in the steady state stage, determine the second energy consumption of the air conditioner.

5. The method for determining the energy consumption of an in-vehicle air conditioner according to claim 4, wherein, The step of constructing a second database related to the third data, the fourth data, and the second energy consumption information based on the third data, the fourth data, and the second energy consumption information includes: Taking the third data as the abscissa, the fourth data as the ordinate, and the second energy consumption information as the Z-axis coordinate to construct a spatial coordinate system, and obtaining the second database; The method for determining the energy consumption of the vehicle-mounted air conditioner further includes: Updating the second database based on the actual measured values of the vehicle's operation.

6. The method for determining the energy consumption of an in-vehicle air conditioner according to any one of claims 1 to 5, characterized in that, The operation stage of the vehicle-mounted air conditioner further includes an initialization stage, wherein when the vehicle-mounted air conditioner is in the initialization stage: The vehicle-mounted air conditioner operates at a preset power for a second duration to adjust the temperature in the cockpit or the temperature of the battery; Wherein, the preset power is greater than the operating power of the vehicle-mounted air conditioner in the transition stage, the preset power is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle, and the second duration is positively correlated with the absolute value of the difference between the target set temperature information and the ambient temperature information of the vehicle; The method for determining the energy consumption of the vehicle-mounted air conditioner further includes: Determining the third energy consumption of the air conditioner in the initialization stage based on the preset power and the second duration; Determining the total energy consumption of the vehicle-mounted air conditioner based on the first energy consumption of the air conditioner, the second energy consumption of the air conditioner, and the third energy consumption of the air conditioner.

7. The method for determining the energy consumption of an in-vehicle air conditioner according to any one of claims 1 to 5, characterized in that, It further includes: Determining the remaining charging time and cruising range of the vehicle based on the total energy consumption; The ambient temperature information of the vehicle is collected based on a preset period; The duration of the preset period is positively correlated with the cruising range.

8. A computer-readable storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by a processor, it implements the method for determining the energy consumption of the vehicle-mounted air conditioner according to any one of claims 1 to 7.

9. A vehicle, characterized in that, It includes: A vehicle body; A control device, the control device is connected to the vehicle body, the control device includes: a memory, a processor, and a computer program stored in the memory and operable on the processor, and the processor is used to implement the method for determining the energy consumption of the vehicle-mounted air conditioner according to any one of claims 1 to 7 when executing the computer program stored in the memory.

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