Vehicle temperature control method, device and vehicle

Abstract

The application relates to a vehicle temperature control method and device and a vehicle, and relates to the technical field of new energy vehicles. The method comprises the following steps: in the case of determining that a cooperative heating working mode is adopted, determining reference working parameters of a heat pump air conditioner corresponding to a target heat load required by the vehicle according to a heating mapping relationship of the heat pump air conditioner in the vehicle, and controlling the heat pump air conditioner to heat according to the reference working parameters; determining initial power of a resistance heater in the vehicle based on the target heat load and a heat load provided by the heat pump air conditioner according to the reference working parameters, and controlling the resistance heater to heat cooperatively with the heat pump air conditioner according to the initial power; in the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets a dynamic adjustment triggering condition, the power of the resistance heater is reduced until the heat load independently provided by the heat pump air conditioner meets the target heat load. The method can reduce the energy consumption of vehicle temperature control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, in particular to a vehicle temperature control method and device and vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicle technology, the demand for environmental protection and energy saving is increasing, and electric vehicles are increasingly widely used. For electric vehicles, the performance of the heating system in winter has a key influence on energy consumption and range. In the existing electric vehicles, a heating scheme of a heat pump air conditioning system and a PTC (Positive Temperature Coefficient Heater) heater working cooperatively is usually adopted in a low-temperature environment in winter.

[0003] However, in the existing combined heating scheme of a heat pump and a PTC heater, the working state of the heat pump and the PTC may be switched late or mismatched, which may cause the overall heating system of the vehicle to run in a low-efficiency state for a long time, resulting in high energy consumption for heating. SUMMARY

[0004] Therefore, it is necessary to provide a vehicle temperature control method, device and vehicle capable of reducing energy consumption in view of the above technical problems.

[0005] In a first aspect, the present application provides a vehicle temperature control method, comprising:

[0006] obtaining a target heat load required by the vehicle;

[0007] In a case where it is determined that the cooperative heating working mode is adopted, determining a reference working parameter of the heat pump air conditioner corresponding to the target heat load according to a heating mapping relationship of the heat pump air conditioner in the vehicle, and controlling the heat pump air conditioner to heat according to the reference working parameter; the heating mapping relationship records the relationship among different environmental temperatures, working parameters of the heat pump air conditioner and heat loads;

[0008] determining an initial power of the electric resistance heater based on the target heat load and the heat load provided by the heat pump air conditioner according to the reference working parameter, and controlling the electric resistance heater to heat cooperatively with the heat pump air conditioner according to the initial power;

[0009] In the process of cooperative heating, in a case where the heat pump air conditioner supports independent coverage of the target heat load and meets a dynamic adjustment triggering condition, the power of the electric resistance heater is reduced until the heat load provided by the heat pump air conditioner independently meets the target heat load.

[0010] In some embodiments, during the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment trigger condition, the power of the electric resistance heater is reduced until the heat load independently provided by the heat pump air conditioner meets the target heat load, comprising: during the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment trigger condition, determining the power reduction gradient parameter; reducing the power of the electric resistance heater according to the power reduction gradient parameter, and dynamically adjusting the real-time working parameters of the heat pump air conditioner until the electric resistance heater is turned off and the heat load independently provided by the heat pump air conditioner meets the target heat load.

[0011] In some embodiments, during the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment trigger condition, determining the power reduction gradient parameter comprises: during the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load based on the heating mapping relationship, determining the output temperature of the heat pump air conditioner; in the case that the output temperature reaches the dynamic adjustment temperature threshold, determining the power reduction gradient parameter.

[0012] In some embodiments, in the case of determining that the vehicle is in the cooperative heating working mode, the reference working parameters of the heat pump air conditioner corresponding to the target heat load are determined according to the heating mapping relationship of the heat pump air conditioner in the vehicle, comprising: in the case that the ambient temperature of the vehicle is in a preset first temperature interval, controlling the electric resistance heater in the vehicle to perform cold start for the heat pump air conditioner, in the case that the cold start is completed, determining that the vehicle is in the cooperative heating working mode, and determining the reference working parameters of the heat pump air conditioner according to the target heat load, the ambient temperature and the heating mapping relationship of the heat pump air conditioner in the vehicle.

[0013] In some embodiments, in the case of determining that the vehicle is in the cooperative heating working mode, the reference working parameters of the heat pump air conditioner are determined according to the target heat load and the heating mapping relationship of the heat pump air conditioner in the vehicle, comprising: in the case that the ambient temperature of the vehicle is in a preset second temperature interval, determining that the vehicle is in the cooperative heating working mode, and determining the reference working parameters of the heat pump air conditioner according to the target heat load, the ambient temperature and the heating mapping relationship of the heat pump air conditioner in the vehicle.

[0014] In some embodiments, the target heat load required by the vehicle is obtained, comprising: obtaining the temperature parameters, the vehicle speed and the light intensity parameters of the vehicle; determining the vehicle temperature difference of the vehicle according to the indoor temperature in the temperature parameters and the set temperature; obtaining the condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity parameters respectively; fusing the vehicle temperature difference, the vehicle speed and the light intensity parameters according to the respective condition coefficients to obtain the target heat load required by the vehicle.

[0015] In some embodiments, the acquiring of the respective condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity parameter comprises: determining an initial condition coefficient corresponding to the vehicle temperature difference under the condition that the influence of the light and the influence of the vehicle speed are excluded; determining an initial condition coefficient corresponding to the light intensity parameter based on the initial condition coefficient corresponding to the vehicle temperature difference under the condition that the influence of the vehicle speed is excluded; determining an initial condition coefficient corresponding to the vehicle speed based on the initial condition coefficient corresponding to the vehicle temperature difference and the initial condition coefficient corresponding to the light intensity parameter under the condition that the influence of the light is excluded; and performing dynamic verification on the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the light intensity parameter and the initial condition coefficient corresponding to the vehicle speed to obtain the respective condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity parameter.

[0016] In some embodiments, the dynamic verification on the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the light intensity parameter and the initial condition coefficient corresponding to the vehicle speed to obtain the respective condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity parameter comprises: performing dynamic verification on the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the light intensity parameter and the initial condition coefficient corresponding to the vehicle speed to obtain respective calibration condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity parameter; and correcting the respective calibration condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity parameter based on a pre-calibrated heating performance curve of the heat pump air conditioner to obtain the respective condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity parameter, wherein the heating performance curve records the energy conversion efficiency of the compressor in the heat pump air conditioner under different working conditions.

[0017] In some embodiments, the vehicle temperature control method further comprises: controlling the heat pump air conditioner to independently perform heating according to the target heat load when the ambient temperature of the vehicle is in a preset third temperature range.

[0018] In some embodiments, the vehicle temperature control method further comprises: setting different ambient temperatures and working parameters of the heat pump air conditioner, determining the heat load provided by the heat pump air conditioner under different ambient temperatures and working parameters of the heat pump air conditioner; and constructing a heating mapping relationship of the heat pump air conditioner according to the different ambient temperatures, the working parameters of the heat pump air conditioner and the heat load provided by the heat pump air conditioner.

[0019] In a second aspect, the present application further provides a vehicle temperature control device, comprising:

[0020] a heat load acquisition module configured to acquire a target heat load required by the vehicle;

[0021] The heat pump air conditioner control module is configured to, in a case where it is determined that the cooperative heating mode is entered, determine a reference working parameter of the heat pump air conditioner corresponding to the target heat load according to a heating mapping relationship of the heat pump air conditioner in the vehicle, and control the heat pump air conditioner to heat according to the reference working parameter; the heating mapping relationship records a relationship among different ambient temperatures, working parameters of the heat pump air conditioner, and heat loads;

[0022] The heater control module is configured to determine an initial power of the electric resistance heater in the vehicle based on the target heat load and the reference working parameter, and control the electric resistance heater to heat cooperatively with the heat pump air conditioner according to the initial power.

[0023] The dynamic adjustment module is configured to, in a case where the heat pump air conditioner supports covering the target heat load independently and meets a dynamic adjustment trigger condition during the cooperative heating, reduce the power of the electric resistance heater until the heat load provided by the heat pump air conditioner independently meets the target heat load.

[0024] In a third aspect, the present application further provides a vehicle, comprising a heat pump air conditioner, an electric resistance heater, a memory, and a processor, the memory stores a computer program, and the processor implements the steps of the method provided in the first aspect when executing the computer program.

[0025] In a fourth aspect, the present application further provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the method provided in the first aspect when executed by a processor.

[0026] In a fifth aspect, the present application further provides a computer program product, which comprises a computer program, and the computer program implements the steps of the method provided in the first aspect when executed by a processor.

[0027] The vehicle temperature control method, device and vehicle determine the reference working parameter of the heat pump air conditioner according to the target heat load required by the vehicle and the heating mapping relationship of the heat pump air conditioner in the vehicle in the case of determining that the vehicle is in the cooperative heating working mode, and control the heat pump air conditioner to heat according to the reference working parameter. The initial power of the electric resistance heater in the vehicle is determined based on the target heat load and the heat load provided by the heat pump air conditioner according to the reference working parameter, and the electric resistance heater is controlled to cooperate with the heat pump air conditioner to heat according to the initial power. In the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment triggering condition, the power of the electric resistance heater is reduced until the heat load independently provided by the heat pump air conditioner meets the target heat load. In the process of cooperative heating by the electric resistance heater and the heat pump air conditioner, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment triggering condition, the power of the electric resistance heater is reduced to dynamically adjust the heating working state of the heat pump air conditioner and the electric resistance heater respectively, so as to ensure the matching of the heating working state between the heat pump air conditioner and the electric resistance heater, so that the heat pump air conditioner and the electric resistance heater can operate in an efficient state, thereby reducing the energy consumption of vehicle temperature control. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the description of the embodiments of the present application or the related art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other related drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 A flowchart of a vehicle temperature control method in an embodiment;

[0030] Figure 2 A flowchart of determining a target heat load in an embodiment;

[0031] Figure 3 A flowchart of a vehicle temperature control method in another embodiment;

[0032] Figure 4 A structural block diagram of a vehicle temperature control device in an embodiment;

[0033] Figure 5 An internal structure diagram of a controller in an embodiment. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0035] It should be noted that the terms "first", "second" and the like used in the present application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "include" and "have" and any variations thereof used in the present application are intended to cover non-exclusive inclusion. The term "a plurality of" used in the present application means two or more. The term "and / or" used in the present application means one of the options or any combination of a plurality of options.

[0036] In an exemplary embodiment, as shown in Figure 1 A vehicle temperature control method is provided, and the controller applied in the vehicle is taken as an example to illustrate the method, which includes the following steps S101 to S104. Wherein:

[0037] Step S101, obtaining a target heat load required by the vehicle.

[0038] The target heat load is required for temperature control of the vehicle, such as the heat required to be supplied in unit time when heating the vehicle, i.e. the target heat load can be used as the heat required to be provided by the heating system of the vehicle in unit time, and the target heat load can be in kilowatts (kW). The target heat load can be determined based on temperature parameters, vehicle speed and light intensity parameters of the vehicle. The temperature parameters can include at least one of the ambient temperature of the vehicle, the temperature inside the vehicle or the set temperature, the ambient temperature is the temperature of the external environment where the vehicle is located, the temperature inside the vehicle can be the temperature of the passenger space inside the vehicle, and the set temperature can be the temperature required to be reached inside the vehicle set by the user; the vehicle speed can be the driving speed of the vehicle; and the light intensity parameter is used to represent the intensity of the light received by the vehicle, such as the intensity of the sunlight received by the vehicle and / or the intensity of the light received by the vehicle.

[0039] Optionally, the controller of the vehicle can obtain the target heat load required by the vehicle at present, which can be the heat required to be provided by the heating system of the vehicle in unit time. In some embodiments, the controller of the vehicle can obtain the temperature parameters, vehicle speed and light intensity parameters of the vehicle, the temperature parameters can be obtained by the temperature sensor set in the vehicle, the vehicle speed can be determined by the controller monitoring the working condition of the vehicle, and the light intensity parameter can be obtained by the light sensor set in the vehicle. The controller can predict the heat load based on the temperature parameters, vehicle speed and light intensity parameters to determine the target heat load required by the vehicle at present.

[0040] In step S102, in a case where it is determined that the cooperative heating operation mode is present, a reference operation parameter of the heat pump air conditioner corresponding to the target heat load is determined according to a heating mapping relationship of the heat pump air conditioner in the vehicle, and the heat pump air conditioner is controlled to perform heating according to the reference operation parameter; the heating mapping relationship records the relationship among different ambient temperatures, operation parameters of the heat pump air conditioner, and heat loads.

[0041] The cooperative heating operation mode can be a temperature control mode in which the heat pump air conditioner of the vehicle is assisted to perform heating by the electric resistance heater, that is, in the cooperative heating operation mode, the heat pump air conditioner of the vehicle and the electric resistance heater need to perform cooperative heating, that is, the heat pump air conditioner and the electric resistance heater jointly perform heating for the vehicle. The heating system of the vehicle can include the heat pump air conditioner and the electric resistance heater. The heat pump air conditioner is an energy transfer device that absorbs heat from a low-temperature environment (such as air outside the vehicle, a battery, and waste heat of an electric motor) by consuming a small amount of electric energy (driven by a compressor), and transfers the heat to the vehicle for heating. The essence is a "reverse refrigeration cycle" (heat is discharged to the outside of the vehicle during refrigeration, and heat is absorbed from the outside of the vehicle during heating). The heat pump air conditioner can include a compressor that drives heat transfer by compressing refrigerant to increase the temperature of the refrigerant. The electric resistance heater can use the resistance characteristic of a conductor (such as ceramic or metal) to achieve heating. Specifically, when current passes through, the resistance generates heat, and the heat is blown into the vehicle by a fan to achieve heating. The electric resistance heater includes but is not limited to a PTC (Positive Temperature Coefficient, positive temperature coefficient thermistor) heater, which is the most common electric resistance heating device in vehicles. The principle is that electric energy is directly converted into heat energy. When the temperature of the PTC heater increases, the resistance sharply increases ("positive temperature coefficient"), which can automatically limit the current (for example, when the temperature is too high, the resistance tends to infinity, and the current tends to 0), thereby avoiding overheating and burning, and having high safety.

[0042] The heating map relationship of the heat pump air conditioner can represent the heating capacity of the heat pump air conditioner, i.e., the heat that the heat pump air conditioner can provide in a unit of time. The heating map relationship can specifically record the relationship among different environmental temperatures, heat pump air conditioner operating parameters, and heat loads. The environmental temperature can be the temperature of the environment in which the heat pump air conditioner is located, which can be obtained according to the environmental temperature of the vehicle, for example. The heat pump air conditioner operating parameter can be the operating parameter of the heat pump air conditioner for heating, which can include the speed of the compressor in the heat pump air conditioner, for example. The heat load can be the heat provided by the heat pump air conditioner in a unit of time when the heat pump air conditioner operates for heating according to the heat pump air conditioner operating parameter at different environmental temperatures. The heat load can be in units of kilowatts (kW). After the environmental temperature of the vehicle and the target heat load required by the vehicle are determined, the corresponding heat pump air conditioner operating parameter can be determined according to the heating map relationship of the heat pump air conditioner, so that the heat pump air conditioner is controlled to operate for heating. The specific form of the heating map relationship can be set according to actual needs, such as a MAP (Performance Map, operating condition performance map) chart form, a table form, or the like. Different heat pump air conditioners can have their respective heating map relationships. The heating map relationship of the heat pump air conditioner can be obtained by pre-test calibration of the heat pump air conditioner. For example, the heat pump air conditioner can be set to operate for heating according to different operating parameters at different environmental temperatures, such as the compressor in the heat pump air conditioner being set to operate for heating according to different speeds, and the corresponding heat load of the heat pump air conditioner is determined. By configuring different combinations of environmental temperature and heat pump air conditioner operating parameter, the corresponding heat load can be determined, so that the heating map relationship of the heat pump air conditioner is constructed. For another example, the compressor in the heat pump air conditioner can be set to operate for heating according to different powers, and the corresponding heat load of the heat pump air conditioner is determined. By configuring different combinations of environmental temperature and power of the compressor, the corresponding heat load can be determined, so that the heating map relationship of the heat pump air conditioner is constructed.

[0043] The reference operating parameter can be a basic operating parameter of the heat pump air conditioner when the heat pump air conditioner starts to operate for heating, such as a reference speed or a reference power of the compressor in the heat pump air conditioner when the heat pump air conditioner starts to operate for heating. In some embodiments, the heat pump air conditioner operating parameter can include the power of the compressor in the heat pump air conditioner, i.e., the heating map relationship of the heat pump air conditioner can record the relationship among different environmental temperatures, the power of the compressor, and the heat load. When it is determined that the heat pump air conditioner is in the cooperative heating operating mode, the controller can determine the reference operating parameter of the heat pump air conditioner from the heating map relationship of the heat pump air conditioner based on the target heat load required by the vehicle and the environmental temperature. The reference operating parameter includes the reference power of the compressor in the heat pump air conditioner, and the controller can control the compressor in the heat pump air conditioner to operate for heating according to the reference power.

[0044] Exemplarily, the controller can determine whether the vehicle is in the cooperative heating working mode, i.e., determine whether the vehicle needs to be assisted in heating by the electric resistance heater for the heat pump air conditioner, i.e., determine whether the vehicle needs to be cooperatively heated by the electric resistance heater and the heat pump air conditioner. For example, the controller can determine a temperature parameter of the vehicle, which can include an ambient temperature of the vehicle, and determine whether to be in the cooperative heating working mode based on the ambient temperature. The controller can determine a heating mapping relationship of the heat pump air conditioner in the vehicle, such as obtaining a MAP graph of a compressor in the heat pump air conditioner, which can record the relationship among different ambient temperatures, working parameters of the compressor and heat loads, and determine the reference working parameter of the heat pump air conditioner in combination with the target heat load. For example, the controller can obtain a compressor speed MAP graph of the compressor in the heat pump air conditioner, which can be used to describe the relationship among the ambient temperature, the heat load and the compressor speed, and can intuitively present the corresponding relationship among the ambient temperature (the temperature outside the vehicle), the heat load and the compressor speed, i.e., "in a certain ambient temperature, when a certain heat load is met, the required speed of the compressor should be run". The controller determines the reference working parameter of the heat pump air conditioner based on the compressor speed MAP graph and the target heat load, such as searching in the compressor speed MAP graph according to the target heat load required by the vehicle to determine the reference speed of the compressor in the heat pump air conditioner, which can be used as the reference working parameter of the heat pump air conditioner. The controller can control the heat pump air conditioner to heat according to the reference working parameter, such as controlling the compressor in the heat pump air conditioner to work according to the reference speed in the reference working parameter to heat the vehicle.

[0045] In step S103, the initial power of the electric resistance heater in the vehicle is determined based on the target heat load and the heat load provided by the heat pump air conditioner when heating according to the reference working parameter, and the electric resistance heater is controlled to cooperatively heat with the heat pump air conditioner according to the initial power.

[0046] The resistance heater is a device that uses Joule heat generated when current passes through a resistance material to achieve heating, and its core principle is that electric energy is directly converted into heat energy. The electric energy-heat energy conversion efficiency of the resistance heater is high, but from the perspective of energy utilization, its heating efficiency is lower than that of the heat pump air conditioner, because 1 kWh (kilowatt hour) of electricity consumption can generate at most 1 kWh of heat, while the heat pump air conditioner can generate 2-4 kWh of heat by absorbing energy from the environment. The initial power is the initial heating power of the resistance heater, i.e., the initial power, when the resistance heater is used to assist the heating of the heat pump air conditioner. The initial power can be determined based on the target heat load and the heat load provided by the heat pump air conditioner according to the reference operating parameters. The target heat load is the heat load required by the vehicle, and the heat load provided by the heat pump air conditioner according to the reference operating parameters is the heat load actually provided by the heat pump air conditioner for the vehicle. Based on the target heat load and the heat load provided by the heat pump air conditioner, the heat load difference of the vehicle can be determined, which can be supplemented by the resistance heater, i.e., the initial power of the resistance heater corresponding to the heat load difference can be determined.

[0047] For example, the controller can determine the initial power of the resistance heater based on the target heat load and the heat load provided by the heat pump air conditioner according to the reference operating parameters. For example, the controller can determine the heat load difference of the vehicle according to the target heat load and the heat load provided by the heat pump air conditioner according to the reference operating parameters, which is the heat load gap of the heating by the heat pump air conditioner, and the controller can determine the initial power of the resistance heater based on the heat load difference. In some embodiments, during the process of controlling the heat pump air conditioner to heat according to the reference operating parameters, such as controlling the compressor in the heat pump air conditioner to heat according to the reference speed in the reference operating parameters, the controller can determine the heat load provided by the compressor in the heat pump air conditioner, such as the controller detecting the actual output power of the compressor and obtaining the heat load provided by the compressor in the heat pump air conditioner to heat according to the reference speed based on the actual output power of the compressor. The heat load provided by the heat pump air conditioner according to the reference operating parameters is the actual heat provided by the heat pump air conditioner for the vehicle per unit time, and the actual output power of the compressor can represent the actual heat provided by the compressor per unit time, so the heat load provided by the compressor in the heat pump air conditioner to heat according to the reference speed can be obtained based on the actual output power of the compressor.

[0048] The controller can obtain a heat load difference of the vehicle based on a difference between the target heat load and a heat load provided by the heat pump air conditioner, and determine the initial power of the electric resistance heater based on the heat load difference. For example, the heat load difference of the vehicle can be AQ, the controller can determine a response coefficient k of the electric resistance heater, which can be obtained by prior test calibration for the electric resistance heater, such as k = 0.7, and the controller can calculate the initial power P 电阻加热器 of the electric resistance heater based on P 电阻加热器 =k×AQ. The controller can control the electric resistance heater to perform collaborative heating with the heat pump air conditioner according to the initial power, that is, the controller can simultaneously start the electric resistance heater and the heat pump air conditioner to perform collaborative heating for the vehicle, so as to jointly provide a heat load for the vehicle.

[0049] In step S104, during the collaborative heating, if the heat pump air conditioner supports independent coverage of the target heat load and a dynamic adjustment trigger condition is met, the power of the electric resistance heater is reduced until the heat load independently provided by the heat pump air conditioner meets the target heat load.

[0050] The heat pump air conditioner supporting independent coverage of the target heat load means that the heat load independently provided by the heat pump air conditioner can meet the target heat load, that is, the maximum heat load provided by the heat pump air conditioner can exceed the target heat load. The dynamic adjustment trigger condition is used to determine whether to trigger dynamic adjustment of the power of the electric resistance heater, which can include a temperature trigger condition, a time trigger condition, an instruction trigger condition, etc. For example, the temperature trigger condition can include that when the outlet air temperature of the compressor in the heat pump air conditioner reaches a certain temperature condition, such as when the temperature difference between the outlet air temperature of the compressor in the heat pump air conditioner and the set temperature of the vehicle is less than a preset threshold, it is considered that the dynamic adjustment trigger condition is met, and then the power of the electric resistance heater can be gradually reduced until the power of the electric resistance heater is reduced to 0, at which time the electric resistance heater does not work and is in an off state, the heat load for the vehicle is independently provided by the heat pump air conditioner, and the heat load independently provided by the heat pump air conditioner can meet the target heat load, that is, the heating demand of the vehicle can be met. In some embodiments, the time trigger condition can include that the duration of the collaborative heating of the electric resistance heater and the heat pump air conditioner reaches a preset duration threshold, and it is considered that the dynamic adjustment trigger condition is met; the instruction trigger condition can include receiving a dynamic adjustment instruction sent by the user, and it is considered that the dynamic adjustment trigger condition is met.

[0051] Optionally, in the process of cooperative heating, the heat pump air conditioner and the electric resistance heater in the vehicle perform heating work simultaneously to cooperatively provide a heat load for the vehicle, the controller can determine whether the heat pump air conditioner supports independent coverage of the target heat load, i.e., whether the heat pump air conditioner can independently provide a heat load for the vehicle according to the target heat load. The controller can also determine whether a dynamic adjustment trigger condition is met to determine whether to trigger dynamic adjustment of the power of the electric resistance heater, specifically, whether the power of the electric resistance heater needs to be reduced. In a case where it is determined that the heat pump air conditioner supports independent coverage of the target heat load and the dynamic adjustment trigger condition is met, the controller can reduce the power of the electric resistance heater, such as the controller can gradually reduce the heat load provided by the electric resistance heater until the heat pump air conditioner independently provides a heat load for the vehicle according to the target heat load, so that the heat pump air conditioner takes over the heating work for the vehicle.

[0052] In some embodiments, if the heat pump air conditioner does not support independent coverage of the target heat load, i.e., the heat load independently provided by the heat pump air conditioner cannot meet the target heat load required by the vehicle, the controller can maintain cooperative heating by the heat pump air conditioner and the electric resistance heater, i.e., continue to maintain heating for the vehicle by the heat pump air conditioner and the electric resistance heater. In some embodiments, if it is determined that the dynamic adjustment trigger condition is not met, the controller can continue to maintain heating for the vehicle by the heat pump air conditioner and the electric resistance heater until the power of the electric resistance heater is reduced when the dynamic adjustment trigger condition is met.

[0053] In the above vehicle temperature control method, in a case where it is determined that the cooperative heating work mode is entered, a reference working parameter of the heat pump air conditioner is determined according to the target heat load and a heating mapping relationship of the heat pump air conditioner in the vehicle, and the heat pump air conditioner is controlled to perform heating according to the reference working parameter. An initial power of the electric resistance heater in the vehicle is determined based on the target heat load and a heat load provided by the heat pump air conditioner performing heating according to the reference working parameter, and the electric resistance heater is controlled to perform cooperative heating with the heat pump air conditioner according to the initial power. In the process of cooperative heating, in a case where the heat pump air conditioner supports independent coverage of the target heat load and the dynamic adjustment trigger condition is met, the power of the electric resistance heater is reduced until the heat load independently provided by the heat pump air conditioner meets the target heat load. In the process of cooperative heating by the electric resistance heater and the heat pump air conditioner, in a case where the heat pump air conditioner supports independent coverage of the target heat load and the dynamic adjustment trigger condition is met, the power of the electric resistance heater is reduced to dynamically adjust the heating working states of the heat pump air conditioner and the electric resistance heater, so as to ensure matching of the heating working states between the heat pump air conditioner and the electric resistance heater, so that the heat pump air conditioner and the electric resistance heater can operate in an efficient state, thereby reducing the energy consumption of vehicle temperature control.

[0054] In an example embodiment, in the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment triggering condition, the power of the electric resistance heater is reduced until the heat load independently provided by the heat pump air conditioner meets the target heat load, comprising: in the process of cooperative heating, in the case that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment triggering condition, determining a power reduction gradient parameter; reducing the power of the electric resistance heater according to the power reduction gradient parameter, and dynamically adjusting the real-time working parameters of the heat pump air conditioner until the electric resistance heater is turned off and the heat load independently provided by the heat pump air conditioner meets the target heat load.

[0055] Wherein, the power reduction gradient parameter is the amplitude of the power of the electric resistance heater reduced each time, and the power reduction gradient parameter can include a specific power value, such as 10 watts, i.e. when reducing the power of the electric resistance heater multiple times, it can be reduced by 10 watts each time; the power reduction gradient parameter can also include a power ratio, such as 4%, i.e. when reducing the power of the electric resistance heater multiple times, it can be reduced by 4% each time. The power reduction gradient parameter can be flexibly configured in advance according to actual needs, such as by a limited number of experiments to calibrate the required power reduction gradient parameter. In some embodiments, the power reduction gradient parameter can be calibrated by real vehicle testing, such as by configuring different power reduction gradient parameters for the electric resistance heater under the condition that the outlet air temperature of the compressor in the heat pump air conditioner is stable, such as the outlet air temperature of the compressor fluctuates within a preset fluctuation range, to calibrate the power reduction gradient parameter of the electric resistance heater each time in actual application. Wherein, the preset fluctuation range can include that the outlet air temperature of the compressor fluctuates within a preset temperature range, such as the temperature fluctuation is within 2℃; the preset fluctuation range can also include that the outlet air temperature of the compressor fluctuates within a preset change rate range, such as the temperature fluctuation is within 5%.

[0056] Optionally, in the process of cooperative heating by the heat pump air conditioner and the electric resistance heater, the controller determines that the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment triggering condition, indicating that the heat pump air conditioner can be independently operated to provide the required heat load of the vehicle. The controller can determine the power reduction gradient parameter for the electric resistance heater, which can be configured in advance according to actual needs. The controller can reduce the power of the electric resistance heater according to the power reduction gradient parameter, and dynamically adjust the real-time working parameters of the heat pump air conditioner, thereby dynamically adjusting the heat loads respectively provided by the electric resistance heater and the heat pump air conditioner, to flexibly adjust the cooperative heating between the electric resistance heater and the heat pump air conditioner.

[0057] In some embodiments, the controller can gradually reduce the power of the resistance heater multiple times according to the power reduction gradient parameter, and after each reduction of the power of the resistance heater, the controller can dynamically adjust the real-time operating parameters of the heat pump air conditioner. For example, after reducing the power of the resistance heater, the controller can determine the heat load required to be provided by the heat pump air conditioner according to the reduced power of the resistance heater and the target heat load required by the vehicle, and determine the real-time operating parameters of the heat pump air conditioner based on the heat load required to be provided by the heat pump air conditioner, such as the real-time speed of the compressor in the heat pump air conditioner can be adjusted based on a closed-loop control algorithm, such as a PI (Proportional-Integral) control algorithm, and the next power reduction process of the resistance heater is performed. The closed-loop control algorithm (also known as feedback control algorithm) is a strategy for dynamically adjusting the control amount to achieve accurate regulation by real-time collection of the deviation between the system output and the set value. The closed-loop control algorithm can include at least one of a PI control algorithm, a PID (Proportional-Integral-Derivative) control algorithm, a fuzzy control algorithm, or an adaptive control algorithm. After the power of the resistance heater is reduced to 0, i.e., the resistance heater is turned off, the target heat load required by the vehicle can be independently provided by the heat pump air conditioner, i.e., the heat pump air conditioner independently provides heat for the vehicle.

[0058] In the present embodiment, when the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment trigger condition, the controller can reduce the power of the resistance heater according to the power reduction gradient parameter and dynamically adjust the real-time operating parameters of the heat pump air conditioner until the resistance heater is turned off and the heat load independently provided by the heat pump air conditioner meets the target heat load. Thus, by dynamically adjusting the operating states of the resistance heater and the heat pump air conditioner, the matching of the heating operating states between the heat pump air conditioner and the resistance heater can be ensured, so that the heat pump air conditioner and the resistance heater can operate in an efficient state, thereby reducing the energy consumption of the vehicle temperature control.

[0059] In one exemplary embodiment, during the cooperative heating, when the heat pump air conditioner supports independent coverage of the target heat load and meets the dynamic adjustment trigger condition, the power reduction gradient parameter is determined, including: during the cooperative heating, when it is determined that the heat pump air conditioner supports independent coverage of the target heat load based on the heating mapping relationship, the output temperature of the heat pump air conditioner is determined; and when the output temperature reaches the dynamic adjustment temperature threshold, the power reduction gradient parameter is determined.

[0060] The output temperature of the heat pump air conditioner can include an outlet air temperature of a compressor in the heat pump air conditioner, and the dynamic adjustment temperature threshold is a determination condition for determining whether dynamic adjustment is needed. The dynamic adjustment temperature threshold can be pre-configured according to actual needs, and when the output temperature of the heat pump air conditioner reaches the dynamic adjustment temperature threshold, it can be considered that the dynamic adjustment trigger condition is met.

[0061] For example, in the process of cooperative heating, the controller can determine whether the heating mapping relationship of the heat pump air conditioner supports independent coverage of the target heat load, that is, whether the heat pump air conditioner can independently provide the required target heat load for the vehicle. When it is determined that the heat pump air conditioner supports independent coverage of the target heat load, the controller can further determine the output temperature of the heat pump air conditioner, which can be obtained according to the outlet air temperature of the compressor in the heat pump air conditioner. The controller can obtain a preset dynamic adjustment temperature threshold, and compare the output temperature with the dynamic adjustment temperature threshold. When it is determined that the output temperature reaches the dynamic adjustment temperature threshold, it can be considered that the dynamic adjustment trigger condition is met at this time, and the controller can determine a power reduction gradient parameter for power reduction of the electric resistance heater, so as to reduce the power of the electric resistance heater according to the power reduction gradient parameter.

[0062] In some embodiments, when it is determined based on the heating mapping relationship of the heat pump air conditioner that the heat pump air conditioner does not support independent coverage of the target heat load, that is, the heat load independently provided by the heat pump air conditioner cannot meet the target heat load required by the vehicle, the controller can maintain cooperative heating by the heat pump air conditioner and the electric resistance heater, that is, continue to maintain heating for the vehicle by the heat pump air conditioner and the electric resistance heater. In some embodiments, if the output temperature of the heat pump air conditioner does not reach the dynamic adjustment temperature threshold, it can be determined that the dynamic adjustment trigger condition is not met, and the controller can continue to maintain heating for the vehicle by the heat pump air conditioner and the electric resistance heater, until the output temperature of the heat pump air conditioner reaches the dynamic adjustment temperature threshold to trigger the power reduction of the electric resistance heater.

[0063] In this embodiment, when it is determined based on the heating mapping relationship that the heat pump air conditioner supports independent coverage of the target heat load and the output temperature of the heat pump air conditioner reaches the dynamic adjustment temperature threshold, the controller can determine that the power of the electric resistance heater needs to be reduced, so as to accurately trigger adjustment of the working states of the electric resistance heater and the heat pump air conditioner, respectively, to ensure matching of the heating working states between the heat pump air conditioner and the electric resistance heater, so that the heat pump air conditioner and the electric resistance heater can operate in an efficient state, thereby reducing the energy consumption of temperature control of the vehicle.

[0064] In an example embodiment, in a case where it is determined that the vehicle is in the cooperative heating operation mode, the base working parameter of the heat pump air conditioner corresponding to the target heat load is determined according to a heating mapping relationship of the heat pump air conditioner in the vehicle, including: in a case where the ambient temperature of the vehicle is in a preset first temperature interval, controlling the electric resistance heater in the vehicle to start the heat pump air conditioner, in a case where the starting is completed, determining that the vehicle is in the cooperative heating operation mode, and determining the base working parameter of the heat pump air conditioner according to the target heat load, the ambient temperature and the heating mapping relationship of the heat pump air conditioner in the vehicle.

[0065] The ambient temperature is the temperature of the external environment in which the vehicle is located. The first temperature interval can be determined based on the heating mapping relationship of the heat pump air conditioner in the vehicle, for example, the first temperature interval can be a temperature interval less than or equal to -15°C. When the ambient temperature is in the first temperature interval, the controller can determine that it is in an extremely low temperature mode, in which the compressor suction pressure of the heat pump air conditioner is low, and the compressor takes the low pressure at the compressor inlet as the control target. The target low pressure is usually set to 1.2-1.5 bar to protect the compressor and avoid the compressor shutdown due to too low compressor inlet pressure. The refrigerant flowability is poor in the extremely low temperature mode, and the electric resistance heater can be used to heat the refrigerant to realize the cold start of the heat pump air conditioner. The cold start refers to the process of starting the compressor of the heat pump air conditioner in a low temperature environment, especially in winter heating, the ambient temperature is usually lower than 5°C, even as low as -10°C or below, and the compressor starts heating from the shutdown state. In the cold start process of the heat pump air conditioner, the electric resistance heater can be used for heating to ensure that the low pressure at the compressor inlet is not lower than 1.2 bar, which can ensure the normal operation of the compressor.

[0066] Exemplarily, the controller can determine a first temperature interval of the pre-calibration setting, and compare the ambient temperature in the temperature parameter of the vehicle with the first temperature interval. When it is determined that the ambient temperature is in the first temperature interval, the controller can determine to be in the ultra-low temperature mode, i.e., the controller can control the electric resistance heater to cold start for the heat pump air conditioner. For example, the controller can control the electric resistance heater to heat, such as to control the electric resistance heater to full-power operation to heat, so as to heat the refrigerant by the electric resistance heater to assist the heat pump air conditioner to cold start. When the cold start ends, such as when the cold start duration reaches a preset duration, the controller can determine to enter the collaborative heating working mode, so as to collaboratively heat by the heat pump air conditioner and the electric resistance heater. In some embodiments, when it is determined to be in the collaborative heating working mode, the controller can determine the reference working parameter of the heat pump air conditioner according to the target heat load, the ambient temperature, and the heating mapping relationship of the heat pump air conditioner in the vehicle, so as to control the heat pump air conditioner to heat according to the reference working parameter. For example, the controller can take the target heat load required by the vehicle as the heat load required to be provided by the heat pump air conditioner, and query based on the heating mapping relationship to determine the corresponding working parameter of the heat pump air conditioner, so as to obtain the reference working parameter of the heat pump air conditioner.

[0067] In the embodiments, when the ambient temperature of the vehicle is in the first temperature interval, the controller can control the electric resistance heater to cold start for the heat pump air conditioner, and enter the collaborative heating working mode after the cold start ends, so as to collaboratively heat by the heat pump air conditioner and the electric resistance heater. The electric resistance heater can be used to cold start for the heat pump air conditioner to ensure the reliability of the heat pump air conditioner to heat.

[0068] In one exemplary embodiment, when it is determined to be in the collaborative heating working mode, the reference working parameter of the heat pump air conditioner is determined according to the target heat load and the heating mapping relationship of the heat pump air conditioner in the vehicle, including: when the ambient temperature of the vehicle is in a preset second temperature interval, it is determined to be in the collaborative heating working mode, and the reference working parameter of the heat pump air conditioner is determined according to the target heat load, the ambient temperature, and the heating mapping relationship of the heat pump air conditioner in the vehicle.

[0069] The ambient temperature is the temperature of the external environment where the vehicle is located. The second temperature interval can be pre-calibrated and determined based on the heating mapping relationship of the heat pump air conditioner in the vehicle, such as the second temperature interval can be a temperature interval greater than -15℃ and less than or equal to -10℃. When the ambient temperature of the vehicle is in the second temperature interval, the controller can directly determine to be in the collaborative heating working mode, so as to collaboratively heat by the heat pump air conditioner and the electric resistance heater.

[0070] Exemplarily, the controller can determine a second temperature interval of the pre-calibration setting, and compare the ambient temperature in the temperature parameter of the vehicle with the second temperature interval, when determining that the ambient temperature is in the second temperature interval, the controller can determine that the vehicle is in the cooperative heating operation mode at this time, and the controller can directly control the heat pump air conditioner and the electric resistance heater to cooperatively heat. In some embodiments, in the case that the ambient temperature is in the preset second temperature interval, the controller can determine a reference operation parameter of the heat pump air conditioner according to the target heat load, the ambient temperature and a heating mapping relationship of the heat pump air conditioner in the vehicle, so as to control the heat pump air conditioner to heat according to the reference operation parameter. For example, the controller can take the target heat load required by the vehicle as the heat load required to be provided by the heat pump air conditioner, and query based on the heating mapping relationship in combination with the ambient temperature to determine the corresponding heat pump air conditioner operation parameter, so as to obtain the reference operation parameter of the heat pump air conditioner.

[0071] In the embodiment, when the ambient temperature of the vehicle is in the second temperature interval, the controller can directly determine that the vehicle is in the cooperative heating operation mode to control the heat pump air conditioner and the electric resistance heater to cooperatively heat, which can accurately determine the operation mode of the vehicle heating system based on the ambient temperature, and is beneficial to improve the heating efficiency.

[0072] In one exemplary embodiment, as shown in Figure 2 the target heat load required by the vehicle is obtained, including steps S201 to S204. Among them:

[0073] Step S201, obtaining the temperature parameter, the vehicle speed and the light intensity parameter of the vehicle.

[0074] Among them, the temperature parameter can include at least one of the ambient temperature of the vehicle, the temperature in the vehicle or the set temperature, the ambient temperature is the temperature of the external environment where the vehicle is located, the temperature in the vehicle can be the temperature of the passenger space inside the vehicle, and the set temperature can be the temperature required to be reached in the vehicle interior set by the user; the vehicle speed can be the driving speed of the vehicle; the light intensity parameter is used to represent the intensity of the light received by the vehicle, such as the light intensity of the sunlight received by the vehicle and / or the light intensity of the light received by the vehicle.

[0075] Optionally, the controller of the vehicle can obtain the temperature parameter, the vehicle speed and the light intensity parameter of the vehicle, the temperature parameter can be obtained by the temperature sensor set in the vehicle, the vehicle speed can be determined by the controller monitoring the working condition of the vehicle, and the light intensity parameter can be obtained by the light sensor set in the vehicle. The controller can predict the heat load based on the temperature parameter, the vehicle speed and the light intensity parameter to determine the target heat load required by the vehicle at present.

[0076] Step S202, determining the vehicle temperature difference of the vehicle according to the temperature in the vehicle and the set temperature in the temperature parameter.

[0077] The interior temperature refers to the temperature inside the vehicle, while the set temperature is the temperature the user intends to achieve inside the vehicle. The vehicle temperature difference represents the difference between the interior temperature and the set temperature, and can be determined based on this difference.

[0078] For example, the controller can determine the vehicle temperature difference based on the in-vehicle temperature and the set temperature included in the temperature parameters. For instance, the controller can calculate the vehicle temperature difference based on the absolute value of the difference between the in-vehicle temperature and the set temperature.

[0079] Step S203: Obtain the condition coefficients for the vehicle temperature difference, vehicle speed, and light intensity parameters.

[0080] The condition coefficient represents the degree of influence of different parameters on the heat load calculation. Different parameters may have different units for their corresponding condition coefficients, thus mapping the parameters to corresponding heat load components. The larger the condition coefficient value, the greater the influence of the corresponding parameter on the heat load calculation. Vehicle temperature difference, vehicle speed, and light intensity parameters can each have pre-set condition coefficients. Optionally, the controller can acquire the pre-set condition coefficients for each of the vehicle temperature difference, vehicle speed, and light intensity parameters. These condition coefficients can be pre-calibrated for the vehicle.

[0081] Step S204: The vehicle temperature difference, vehicle speed and light intensity parameters are fused according to their respective condition coefficients to obtain the target heat load required by the vehicle.

[0082] For example, the controller can fuse vehicle temperature difference, vehicle speed and light intensity parameters. Specifically, the controller can fuse vehicle temperature difference, vehicle speed and light intensity parameters according to their respective condition coefficients to obtain the target thermal load required by the vehicle.

[0083] In this embodiment, the controller integrates the vehicle temperature difference, vehicle speed, and light intensity parameters according to their respective condition coefficients. By integrating multiple dimensions of vehicle temperature difference, vehicle speed, and light intensity according to preset condition coefficients, the accuracy of the target heat load can be ensured, thereby guaranteeing the accuracy and reliability of vehicle temperature control.

[0084] In an example embodiment, the controller obtains the condition coefficient of the vehicle temperature difference, the vehicle speed and the light intensity parameter respectively by: determining the initial condition coefficient of the vehicle temperature difference under the condition of excluding the influence of the light intensity and the vehicle speed; determining the initial condition coefficient of the light intensity parameter based on the initial condition coefficient of the vehicle temperature difference under the condition of excluding the influence of the vehicle speed; determining the initial condition coefficient of the vehicle speed based on the initial condition coefficient of the vehicle temperature difference and the initial condition coefficient of the light intensity parameter under the condition of excluding the influence of the light intensity; and dynamically verifying the initial condition coefficient of the vehicle temperature difference, the initial condition coefficient of the light intensity parameter and the initial condition coefficient of the vehicle speed to obtain the condition coefficient of the vehicle temperature difference, the condition coefficient of the vehicle speed and the condition coefficient of the light intensity parameter respectively.

[0085] The condition coefficient of the vehicle temperature difference, the condition coefficient of the vehicle speed and the condition coefficient of the light intensity parameter can be determined by pre-calibration through experiments, for example, the condition coefficient of the vehicle temperature difference, the condition coefficient of the vehicle speed and the condition coefficient of the light intensity parameter can be calibrated respectively under different environments. The dynamic verification can be a process of dynamically adjusting the initial condition coefficient of the vehicle temperature difference, the initial condition coefficient of the vehicle speed and the initial condition coefficient of the light intensity parameter to determine the condition coefficient of the vehicle temperature difference, the condition coefficient of the vehicle speed and the condition coefficient of the light intensity parameter respectively.

[0086] For example, the controller can calibrate the condition coefficient of the vehicle temperature difference under the condition of excluding the influence of the light intensity and the vehicle speed to determine the initial condition coefficient of the vehicle temperature difference. For example, the controller can complete the calibration of the condition coefficient of the vehicle temperature difference statically in a place with weak light intensity, so that the influence of the vehicle speed and the light intensity can be excluded. The controller can calibrate the condition coefficient of the light intensity parameter under the condition of excluding the influence of the light intensity. For example, the controller can further introduce the light intensity after determining the initial condition coefficient of the vehicle temperature difference, and complete the calibration of the condition coefficient of the light intensity parameter statically, so that the initial condition coefficient of the light intensity parameter can be determined under the condition of excluding the influence of the vehicle speed in combination with the initial condition coefficient of the vehicle temperature difference which has been calibrated. The controller can calibrate the condition coefficient of the vehicle speed under the condition of excluding the influence of the light intensity. For example, the controller can further introduce the vehicle speed after determining the initial condition coefficient of the vehicle temperature difference and the initial condition coefficient of the light intensity parameter, and complete the calibration of the condition coefficient of the vehicle speed dynamically in a place with weak light intensity. The controller can dynamically verify the initial condition coefficient of the vehicle temperature difference, the initial condition coefficient of the vehicle speed and the initial condition coefficient of the light intensity parameter, that is, the controller can dynamically adjust the initial condition coefficient of the vehicle temperature difference, the initial condition coefficient of the vehicle speed and the initial condition coefficient of the light intensity parameter to obtain the condition coefficient of the vehicle temperature difference, the condition coefficient of the vehicle speed and the condition coefficient of the light intensity parameter respectively.

[0087] In this embodiment, the controller can calibrate and determine the initial condition coefficients of vehicle temperature difference, vehicle speed and light intensity parameters under different conditions, and perform dynamic verification to determine the condition coefficients of vehicle temperature difference, vehicle speed and light intensity parameters, which can ensure the reliability of the calibrated condition coefficients.

[0088] In an exemplary embodiment, dynamic verification is performed on the initial condition coefficients corresponding to the vehicle temperature difference, the light intensity parameter, and the vehicle speed to obtain the condition coefficients for each of the vehicle temperature difference, vehicle speed, and light intensity parameters. This includes: dynamically verifying the initial condition coefficients corresponding to the vehicle temperature difference, the light intensity parameter, and the vehicle speed to obtain the calibration condition coefficients for each of the vehicle temperature difference, vehicle speed, and light intensity parameters; and correcting the calibration condition coefficients for each of the vehicle temperature difference, vehicle speed, and light intensity parameters based on the pre-calibrated heating performance curve of the heat pump air conditioner to obtain the condition coefficients for each of the vehicle temperature difference, vehicle speed, and light intensity parameters. The heating performance curve records the energy conversion efficiency of the compressor in the heat pump air conditioner under different operating conditions.

[0089] Among them, the calibration condition coefficients are the condition coefficients determined after dynamic verification of the initial condition coefficients for vehicle temperature difference, vehicle speed, and light intensity parameters. The heating performance curve characterizes the heating capacity of a heat pump air conditioner under different operating conditions. The heating performance curve records the energy conversion efficiency of the compressor in the heat pump air conditioner under different operating conditions. For example, the heating performance curve of a heat pump air conditioner may include the compressor's COP (Coefficient of Performance) curve. The COP curve describes the mapping relationship between the compressor's coefficient of performance (COP) and the compressor under different operating conditions in heating mode. Operating conditions can include, but are not limited to, various types of conditions such as speed and ambient temperature. The coefficient of performance (COP) can be based on the compressor's output heating capacity (…). The COP (Coefficient of Performance) is calculated from the power consumed by the compressor (W). A higher COP indicates that the compressor generates more heat per unit of electrical energy consumed, thus indicating a higher energy conversion efficiency. The heating performance curve of a heat pump air conditioner can be pre-calibrated. For example, the heating capacity of the compressor in the heat pump air conditioner can be tested and plotted under different operating conditions on a test bench, thus obtaining the heating performance curve of the heat pump air conditioner. The heating performance curve of the heat pump air conditioner can be used to correct the calibration condition coefficients of vehicle temperature difference, vehicle speed, and light intensity parameters using the power-based calculation method, to obtain the final condition coefficients for each of these parameters.

[0090] For example, the controller can dynamically verify the initial condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity, respectively, to obtain the calibrated condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity. For example, the controller can introduce the vehicle speed and the light intensity, dynamically fine-tune the initial condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity, respectively, to obtain the calibrated condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity. The controller can determine the heating performance curve of the heat pump air conditioner, and correct the calibrated condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity, respectively, based on the heating performance curve of the heat pump air conditioner, to obtain the condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity. In some embodiments, the controller can correct the calibrated condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity, respectively, based on the power backstepping method, using the heating performance curve of the heat pump air conditioner, such as the controller can control the heat load difference between the target heat load required by the vehicle and the heat load provided by the heat pump air conditioner to be within a preset range. For example, the controller can control (Qload-Qheating) / Qheating≤15%, wherein Qload is the target heat load required by the vehicle, Qheating is the heat load provided by the heat pump air conditioner, and Qheating=COP×P, COP is the heating performance coefficient of the compressor in the heat pump air conditioner, which can be determined based on the current working condition (such as speed, ambient temperature) from the COP curve of the compressor; P is the power of the compressor in the heat pump air conditioner when the heat pump air conditioner is heating.

[0091] In this embodiment, the controller can correct the condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity, respectively, after dynamically verifying the initial condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity, and combining the heating performance curve of the heat pump air conditioner, and can adjust the condition coefficients of the vehicle temperature difference, the vehicle speed and the light intensity, respectively, based on the dynamic verification and the correction of the heat pump air conditioner, to ensure the reliability of the determined condition coefficients.

[0092] In one exemplary embodiment, the vehicle temperature control method further comprises: when the ambient temperature of the vehicle is in a preset third temperature interval, controlling the heat pump air conditioner to independently heat according to the target heat load.

[0093] The ambient temperature can be the temperature of the environment in which the vehicle is located. The third temperature interval can be determined based on the heating mapping relationship of the heat pump air conditioner in the vehicle, such as the third temperature interval can be a temperature interval greater than -10°C (degrees Celsius) and less than 0°C. When the ambient temperature is in the third temperature interval, it can be determined that the heat pump air conditioner supports independent coverage of the target heat load, i.e. at this ambient temperature, the target heat load required by the vehicle can be directly achieved by independent operation of the heat pump air conditioner, without the need for auxiliary heating by the electric resistance heater.

[0094] Optionally, the controller can determine a third temperature interval of the pre-calibration setting, and compare the ambient temperature in the temperature parameter with the third temperature interval, when determining that the ambient temperature is in the third temperature interval, the controller can determine to directly enter the heat pump mode, that is, the controller can directly control the heat pump air conditioner to independently perform heating according to the target heat load. In some embodiments, the controller can determine a reference working parameter of the heat pump air conditioner according to the target heat load and the heating mapping relationship of the heat pump air conditioner in the vehicle, for example, the reference working parameter can include a reference rotating speed of the compressor in the heat pump air conditioner, and the controller can control the heat pump air conditioner to perform heating according to the reference working parameter, at this time, the electric resistance heater is closed and does not work, and the target heat load required by the vehicle can be directly provided by the heat pump air conditioner independently.

[0095] In the embodiment, when the ambient temperature of the vehicle is in the third temperature interval, the controller directly controls the heat pump air conditioner to independently perform heating according to the target heat load, at this time, the electric resistance heater is closed, which is beneficial to reduce the energy consumption of the vehicle temperature control.

[0096] In an exemplary embodiment, the vehicle temperature control method further comprises: setting different ambient temperatures and heat pump air conditioner working parameters, determining the heat load correspondingly provided by the heat pump air conditioner under different ambient temperatures and heat pump air conditioner working parameters; and constructing a heating mapping relationship of the heat pump air conditioner according to the different ambient temperatures, the heat pump air conditioner working parameters and the heat load correspondingly provided by the heat pump air conditioner.

[0097] Different heat pump air conditioners can have corresponding heating mapping relationships, and the heating mapping relationship of the heat pump air conditioner can be determined by multiple tests on the heat pump air conditioner in advance. For example, the controller can set the heat pump air conditioner to perform heating according to different working parameters under different ambient temperatures, for example, the compressor in the heat pump air conditioner can be set to perform heating according to different rotating speeds, and the heat load correspondingly provided by the heat pump air conditioner can be determined, by configuring different combinations of ambient temperature + heat pump air conditioner working parameters, the heat load correspondingly provided can be determined, and thus the heating mapping relationship of the heat pump air conditioner can be constructed.

[0098] In the embodiment, the heat pump air conditioner is controlled to perform heating according to different heat pump air conditioner working parameters under different ambient temperatures, and the heat load correspondingly provided is determined, and thus the heating mapping relationship of the heat pump air conditioner is constructed, which can accurately represent the heating capacity of the heat pump air conditioner based on the heating mapping relationship, and ensure the accuracy of the heating working control of the heat pump air conditioner.

[0099] The application also provides an application scenario, which applies the vehicle temperature control method described above. Specifically, in the application scenario, the electric resistance heater is a PTC heater, and the application of the vehicle temperature control method in the application scenario is as follows:

[0100] The existing pure electric vehicle is configured with a heat pump air conditioner and a PTC heater. In winter, common heating is generally achieved by simply dividing the cooperation interval of the heat pump air conditioner compressor and the PTC heater according to the ambient temperature. Generally, when the ambient temperature is higher than -10℃, the heat pump air conditioner compressor is used for heating, and when the ambient temperature is less than or equal to -10℃, the compressor coupled with the PTC heater is used for collaborative heating. The PTC heater control power is usually obtained according to the ambient temperature-power map table (the map is calibrated by an environmental chamber or an actual road environment), and the compressor speed is adjusted based on the PID (Proportional-Integral-Derivative controller) algorithm, aiming to maintain the outlet temperature and the set temperature within ±0.5℃. However, this method cannot achieve efficient cooperation between the heat pump and the PTC heater, resulting in high energy consumption of the vehicle temperature control process.

[0101] The vehicle temperature control method provided in the present application can adopt a hierarchical control strategy. Specifically, the upper decision layer allocates the power of the compressor and the PTC heater based on the heat load prediction, and the lower execution layer adjusts the implementation speed of the compressor and the power of the PTC heater in real time. Specifically, as shown in Figure 3 The controller can obtain the ambient temperature, the indoor temperature, the set temperature, the vehicle speed and the light intensity parameters of the vehicle, and predict the target heat load required by the vehicle through a heat load prediction model. The controller determines whether the heat pump air conditioner can independently meet the heat load demand of the vehicle, i.e., whether it can independently provide the target heat load required by the vehicle. If the controller determines that the heat pump air conditioner can independently provide the target heat load, the heat pump air conditioner can be controlled to work alone; if the controller determines that the heat pump air conditioner cannot independently provide the target heat load, the PTC heater can be controlled to start heating. During the collaborative heating process of the heat pump air conditioner and the PTC heater, the controller can control the speed of the compressor and the power of the PTC heater based on a dynamic power allocation algorithm, and perform real-time feedback adjustment.

[0102] Specifically, a heat load prediction model can be constructed to predict the target heat load required by the vehicle. In this application scenario, the light intensity parameter can include the sunshine intensity, and the temperature parameters of the vehicle can include the ambient temperature, the indoor temperature and the set temperature; the controller can obtain the following parameters through the real vehicle sensor: the ambient temperature (Tenv), the indoor temperature (Tin), the set temperature (Tset), the vehicle speed (v) and the sunshine intensity (S).

[0103] Heat load prediction formula:

[0104] wherein, ​​The predicted target thermal load can be, the condition coefficient a can be the condition coefficient corresponding to the vehicle temperature difference, the condition coefficient β can be the condition coefficient corresponding to the vehicle speed, and the condition coefficient γ can be the condition coefficient corresponding to the solar radiation intensity. The condition coefficients a, β, and γ can be calibrated through experiments. For example: a = 0.5 kW / ℃ (representing the influence of temperature difference on thermal load demand), β = 0.02 kW / (km / h) (representing the degree of influence of vehicle speed on thermal load demand), and γ = 0.02 kW / (W / m2) (representing the influence of light intensity on thermal load demand).

[0105] Specifically, the calibration process for each condition coefficient a, β, and γ can include the following steps:

[0106] In places with weak solar radiation intensity, the calibration of the condition coefficient a is completed statically (i.e., calibration of the condition coefficient a is performed under the condition of excluding the influence of vehicle speed and light);

[0107] Then introduce light, and complete the calibration of the supplementary condition coefficient γ statically (i.e., calibration of the condition coefficient γ is performed under the condition of excluding the influence of vehicle speed);

[0108] Finally, introduce the vehicle speed, and complete the calibration of the supplementary condition coefficient β dynamically in places with weak solar radiation intensity (i.e., calibration of the condition coefficient β is performed under the condition of excluding the influence of light);

[0109] Introduce vehicle speed and light, and dynamically verify the fine-tuning of the condition coefficients a, β, and γ to complete parameter calibration, thereby obtaining the calibration condition coefficients of the vehicle temperature difference, vehicle speed, and light intensity parameters.

[0110] Further, the calibration condition coefficients a, β, and γ are corrected by the air conditioning power backstepping method Qheating=COP×Pcompressor. Wherein, Qheating is the heat load provided by the compressor of the heat pump air conditioner, COP is the heating performance coefficient of the compressor in the heat pump air conditioner, which can be determined based on the current working condition (such as speed, ambient temperature) from the compressor COP curve, and the compressor COP curve can be obtained by the compressor manufacturer on the test bench for different working conditions. Specifically, the heat load difference can be controlled within a predetermined range, such as (Qload-Qheating) / Qheating≤15%, wherein Qload is the target thermal load required by the vehicle.

[0111] In the dynamic coupling control process for the vehicle temperature, for the compressor control in the heat pump air conditioner, the speed of the compressor can be adjusted. Specifically, the reference speed of the compressor can be determined based on the heating mapping relationship of the heat pump air conditioner, so as to preferentially provide the heat load for the vehicle by the heat pump air conditioner, and then the real-time speed of the compressor (i.e. the real-time working parameter of the heat pump air conditioner) is accurately adjusted according to the PI algorithm, so as to adjust the outlet air temperature of the compressor. The heating mapping relationship of the heat pump air conditioner can include a compressor speed MAP graph of the compressor in the heat pump air conditioner, which can include the relationship among different ambient temperatures, compressor speeds and heat loads in the compressor. As shown in the feature point data in Table 1 below, the compressor speed MAP graph can be queried, i.e. it can include the relationship among different ambient temperatures, compressor speeds and heat loads.

[0112] Table 1

[0113]

[0114] As shown in Table 1 above, when the ambient temperature is 5℃ and the target heat load (i.e. the heat load expected to be provided by the compressor in the heat pump air conditioner) required by the vehicle is 2.0kw, the reference speed of the compressor in the heat pump air conditioner can be determined as 3500rpm (revolutions per minute).

[0115] For the PTC heater, the power control can be performed according to the heat load difference. Specifically, the controller can determine the heat load provided by the heat pump air conditioner for heating according to the reference working parameter, and determine the heat load difference of the vehicle according to the target heat load and the heat load provided by the heat pump air conditioner for heating according to the reference working parameter. The heat load difference can be obtained based on the difference between the target heat load and the heat load provided by the heat pump air conditioner, such as heat load difference ΔQ = Qload-Q 压缩机 , Qload is the target heat load required by the vehicle, and Q 压缩机 is the heat load provided by the heat pump air conditioner for heating according to the reference working parameter. The heat load Q 压缩机 provided by the heat pump air conditioner for heating according to the reference working parameter is the actual heat provided by the heat pump air conditioner for the vehicle per unit time, and the actual output power of the compressor can represent the actual heat provided by the compressor per unit time, so the heat load Q 压缩机 provided by the compressor in the heat pump air conditioner for heating according to the reference speed can be obtained based on the actual output power of the compressor, such as Q 压缩机 =P 压缩机 , wherein P 压缩机 may be the actual output power of the compressor, which can be obtained by monitoring the compressor.

[0116] Further, the initial power of the PTC heater can be based on calculated. Wherein, may be the initial power of the PTC heater; k can be the response coefficient of the PTC heater, which can be used to avoid temperature overshoot, and the response coefficient k can be set according to actual needs, such as k = 0.7. is the difference between the target heat load and the heat load provided by the heat pump air conditioner according to the reference working parameters.

[0117] In the data calibration, as shown in Table 2 below, the data to be calibrated can include the compressor speed MAP, the response coefficient k, and the heat load provided by the heat pump air conditioner.

[0118] Table 2

[0119]

[0120] In some embodiments, for the compressor speed MAP, the relationship between different ambient temperatures, compressor speeds and heat loads can be calibrated based on the bench test under different ambient temperatures and different compressor load rates, so as to obtain the compressor speed MAP. For the response coefficient k, the real vehicle test calibration can be performed based on the target of avoiding temperature overshoot. The heat load provided by the heat pump air conditioner can be determined by the low-temperature environmental chamber test under the condition of ensuring the steady-state performance at an ambient temperature of -20°C. Based on the calibrated heat load provided by the heat pump air conditioner, different heating working modes can be divided.

[0121] In the switching process of different heating operation modes, control can be performed according to different priorities. Specifically, in the case where it is determined that the ambient temperature of the vehicle is in a preset first temperature interval, for example, if the ambient temperature ≤-15°C (which can be determined by calibration), the ultra-low temperature mode can be preferred, at this time the compressor suction pressure is low, and the compressor takes the low pressure at the compressor inlet as the control target, and the target low pressure is usually set to 1.2-1.5 bar to protect the compressor and avoid compressor shutdown due to excessively low compressor inlet pressure. The refrigerant flow is poor in the ultra-low temperature mode, and the PTC heater is used to heat the refrigerant (e.g., the PTC heater operates at full power). Cold start can be maintained for 2-3 minutes (the cold start time is adjusted through actual test, and the target is that the compressor inlet low pressure cannot be lower than 1.2 bar during the cold start phase). After the cold start time reaches, the cooperative heating operation mode is entered, the reference speed of the compressor (i.e., the reference operating parameter) can be determined based on the compressor speed MAP, and the PTC heater can control the initial power according to the difference between the target heat load and the heat load provided by the heat pump air conditioner according to the reference operating parameter, and then the PI (Proportional-Integral) adjustment algorithm of the compressor is used to accurately adjust the outlet air temperature of the compressor. The PI adjustment algorithm belongs to a closed-loop control algorithm, which is used to stabilize the outlet air temperature of the compressor in the target range by dynamically adjusting the operating state (such as speed) of the compressor, to ensure efficient and stable operation of the heating system. After entering the cooperative heating operation mode, if the compressor can cover all target heat loads (i.e., the heat pump air conditioner can independently cover the target heat load), when the outlet air temperature of the compressor approaches the set temperature within a range of 4°C (i.e., the dynamic adjustment trigger condition is met), the power of the PTC heater can be gradually reduced, such as by setting a power reduction gradient parameter to gradually reduce the power of the PTC heater, and the power reduction gradient parameter can be pre-confirmed through real vehicle calibration to ensure that the outlet air temperature is relatively stable and the fluctuation is controlled within ±2°C. During the process of gradually reducing the power of the PTC heater, the real-time speed of the compressor can be adjusted by the PI adjustment algorithm to adjust the outlet air temperature of the compressor, until the PTC heater is completely turned off and the compressor completely takes over, at which time the heat load provided by the heat pump air conditioner independently meets the target heat load required by the vehicle. If the compressor cannot cover all target heat loads, the cooperative heating operation mode can still be used, i.e., the heat pump air conditioner and the PTC heater cooperate to heat the vehicle.

[0122] Further, in the case that the ambient temperature of the vehicle is in a preset second temperature interval, for example, if the ambient temperature is >-15℃ (-15℃ can be determined by calibration), the cooperative heating mode is preferentially entered, the compressor determines the reference speed of the compressor (i.e., the reference working parameter) based on the compressor speed MAP, the PTC heater can control the initial power according to the difference between the target heat load and the heat load provided by the heat pump air conditioner according to the reference working parameter, and then the outflow temperature of the compressor is accurately adjusted through the PI adjustment algorithm of the compressor. After entering the cooperative heating mode, if the compressor can cover all the target heat load (i.e., the heat pump air conditioner supports independent coverage of the target heat load), in the case that the outflow temperature of the compressor is close to the set temperature within a range of 4℃ (i.e., the dynamic adjustment trigger condition is met), the power of the PTC heater can be gradually reduced, such as by setting a power reduction gradient parameter to reduce the power of the PTC heater, and the power reduction gradient parameter can be pre-confirmed by real vehicle calibration to ensure that the outflow temperature is relatively stable and the fluctuation is controlled within ±2℃. In the process of gradually reducing the power of the PTC heater, the real-time speed of the compressor can be adjusted through the PI adjustment algorithm to adjust the outflow temperature of the compressor, until the PTC heater is completely closed and the compressor completely takes over, at which time the heat load provided by the heat pump air conditioner independently meets the target heat load required by the vehicle. If the compressor cannot cover all the target heat load, the cooperative heating mode can still be run, i.e., the heat pump air conditioner and the PTC heater cooperatively heat the vehicle.

[0123] In addition, in the case that the ambient temperature of the vehicle is in a preset third temperature interval, for example, if the ambient temperature is >-10℃ (-10℃ can be determined by calibration), it is determined that the heat pump mode is preferential, at which time the compressor runs independently and the PTC heater is closed, i.e., at which time the heat pump air conditioner independently heats according to the target heat load.

[0124] Among them, for each temperature interval to be calibrated (first temperature interval, second temperature interval, third temperature interval), the heating capacity of the heat pump air conditioner under-20~0℃ environment test can be calibrated respectively. The calibration is based on the following. The environment temperature interval in which the compressor of the heat pump air conditioner can independently cover the heat load and has a large remaining capacity is divided into the heat pump mode, and the energy consumption is preferential. The environment temperature interval in which the compressor of the heat pump air conditioner cannot independently cover the heat load or has cold start difficulty is divided into the extremely low temperature mode to ensure the heating reliability. When the compressor of the heat pump air conditioner can independently cover the heat load but has little remaining capacity and has no cold start problem and needs to rely on the PTC heater for assistance, the corresponding environment temperature interval can be divided into the cooperative heating mode to balance the speed and energy consumption, so that the heat pump air conditioner can quickly heat up in the winter low temperature environment while taking into account the energy consumption and reliability.

[0125] For multi-mode switching logic of heat pump mode, ultra-low temperature mode and collaborative heating working mode, as shown in Table 3.

[0126] Table 3

[0127]

[0128] As shown in Table 3, in the heat pump mode, the control strategy is that the compressor covers all target heat loads, and the PTC heater is turned off, at which time the energy consumption is optimal; in the collaborative heating working mode, the control strategy is that the compressor is medium speed + the PTC heater is supplemented as needed, so that the heating speed and energy consumption can be balanced; in the ultra-low temperature mode, the control strategy is that the compressor speed is ≤3000 rpm, and the PTC heater provides heat load greater than 5kw, so as to ensure the heating reliability.

[0129] It should be understood that, although each step in the flowchart involved in each of the above-described embodiments is shown in sequence according to the arrow, these steps are not necessarily executed in sequence according to the arrow. Unless otherwise specified herein, there is no strict order limitation for the execution of these steps, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each of the above-described embodiments can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be alternately executed with at least part of other steps or steps or stages in other steps. It can be understood that the steps in different embodiments can be freely combined as needed, and various non-contradictory schemes formed by the combination are within the scope of protection of the present application.

[0130] Based on the same inventive concept, the embodiments of the present application also provide a vehicle temperature control device for implementing the above-mentioned vehicle temperature control method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more vehicle temperature control device embodiments provided below can refer to the limitations of the vehicle temperature control method in the above text, which will not be repeated here.

[0131] In one exemplary embodiment, as shown in Figure 4 a vehicle temperature control device 400 is provided, comprising: a heat load acquisition module 401, a heat pump air conditioner control module 402, a heater control module 403 and a dynamic adjustment module 404, wherein:

[0132] The heat load acquisition module 401 is configured to acquire a target heat load required by the vehicle.

[0133] The heat pump air conditioner control module 402 is configured to, in a case where it is determined that the vehicle is in the cooperative heating operation mode, determine a reference operating parameter of the heat pump air conditioner corresponding to the target heat load according to a heating mapping relationship of the heat pump air conditioner in the vehicle, and control the heat pump air conditioner to heat according to the reference operating parameter; the heating mapping relationship records a relationship among different ambient temperatures, operating parameters of the heat pump air conditioner, and heat loads.

[0134] The heater control module 403 is configured to determine an initial power of the electric resistance heater in the vehicle based on the target heat load and a heat load provided by the heat pump air conditioner operating according to the reference operating parameter, and control the electric resistance heater to cooperate with the heat pump air conditioner to heat according to the initial power.

[0135] The dynamic adjustment module 404 is configured to, in a case where the heat pump air conditioner supports independent coverage of the target heat load and a dynamic adjustment triggering condition is met during the cooperative heating, reduce the power of the electric resistance heater until the heat load independently provided by the heat pump air conditioner meets the target heat load.

[0136] In some embodiments, the dynamic adjustment module 404 is further configured to, in a case where the heat pump air conditioner supports independent coverage of the target heat load and a dynamic adjustment triggering condition is met during the cooperative heating, determine a power reduction gradient parameter; reduce the power of the electric resistance heater according to the power reduction gradient parameter, and dynamically adjust a real-time operating parameter of the heat pump air conditioner until the electric resistance heater is turned off and the heat load independently provided by the heat pump air conditioner meets the target heat load.

[0137] In some embodiments, the dynamic adjustment module 404 is further configured to, in a case where it is determined that the heat pump air conditioner supports independent coverage of the target heat load based on the heating mapping relationship during the cooperative heating, determine an output temperature of the heat pump air conditioner; and in a case where the output temperature reaches a dynamic adjustment temperature threshold, determine the power reduction gradient parameter.

[0138] In some embodiments, the heat pump air conditioner control module 402 is further configured to, in a case where an ambient temperature of the vehicle is in a preset first temperature range, control the electric resistance heater in the vehicle to perform cold start for the heat pump air conditioner, and in a case where the cold start is completed, determine that the vehicle is in the cooperative heating operation mode, and determine the reference operating parameter of the heat pump air conditioner according to the target heat load, the ambient temperature, and the heating mapping relationship of the heat pump air conditioner in the vehicle.

[0139] In some embodiments, the heat pump air conditioner control module 402 is further configured to, in a case where an ambient temperature of the vehicle is in a preset second temperature range, determine that the vehicle is in the cooperative heating operation mode, and determine the reference operating parameter of the heat pump air conditioner according to the target heat load, the ambient temperature, and the heating mapping relationship of the heat pump air conditioner in the vehicle.

[0140] In some embodiments, the heat load acquisition module 401 is further configured to acquire a temperature parameter, a vehicle speed, and an illumination intensity parameter of the vehicle; determine a vehicle temperature difference of the vehicle according to an indoor temperature in the temperature parameter and a set temperature; acquire respective condition coefficients of the vehicle temperature difference, the vehicle speed, and the illumination intensity parameter; and fuse the vehicle temperature difference, the vehicle speed, and the illumination intensity parameter according to the respective condition coefficients to obtain a target heat load required by the vehicle.

[0141] In some embodiments, the heat load acquisition module 401 is further configured to determine an initial condition coefficient corresponding to the vehicle temperature difference under the condition that the illumination effect and the vehicle speed effect are excluded; determine an initial condition coefficient corresponding to the illumination intensity parameter based on the initial condition coefficient corresponding to the vehicle temperature difference under the condition that the vehicle speed effect is excluded; determine an initial condition coefficient corresponding to the vehicle speed based on the initial condition coefficient corresponding to the vehicle temperature difference and the initial condition coefficient corresponding to the illumination intensity parameter under the condition that the illumination effect is excluded; and dynamically verify the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the illumination intensity parameter, and the initial condition coefficient corresponding to the vehicle speed to obtain the respective condition coefficients of the vehicle temperature difference, the vehicle speed, and the illumination intensity parameter.

[0142] In some embodiments, the heat load acquisition module 401 is further configured to dynamically verify the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the illumination intensity parameter, and the initial condition coefficient corresponding to the vehicle speed to obtain respective calibration condition coefficients of the vehicle temperature difference, the vehicle speed, and the illumination intensity parameter; and correct the respective calibration condition coefficients of the vehicle temperature difference, the vehicle speed, and the illumination intensity parameter based on a pre-calibrated heating performance curve of the heat pump air conditioner to obtain the respective condition coefficients of the vehicle temperature difference, the vehicle speed, and the illumination intensity parameter, wherein the heating performance curve records energy conversion efficiencies of a compressor in the heat pump air conditioner under different working conditions.

[0143] In some embodiments, the vehicle temperature control device further comprises a heat pump independent heating module configured to control the heat pump air conditioner to independently perform heating according to the target heat load when an ambient temperature of the vehicle is in a preset third temperature range.

[0144] In some embodiments, the vehicle temperature control device further comprises a mapping relationship determination module configured to set different ambient temperatures and working parameters of the heat pump air conditioner, determine a heat load provided by the heat pump air conditioner under different ambient temperatures and working parameters of the heat pump air conditioner, and construct a heating mapping relationship of the heat pump air conditioner according to the different ambient temperatures, the working parameters of the heat pump air conditioner, and the heat load provided by the heat pump air conditioner.

[0145] The above-mentioned modules in the vehicle temperature control device can be realized by software, hardware, or a combination thereof. The above-mentioned modules can be embedded in or independent of a processor in a controller in hardware form, or can be stored in a memory in the controller in software form, so as to be called and executed by the processor.

[0146] In an example embodiment, a controller is provided, which can have an internal structure diagram as shown in Figure 5 The controller includes a processor, a memory, an input / output interface (I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the controller is configured to provide computing and control capabilities. The memory of the controller includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the controller is configured to exchange information between the processor and external devices. The communication interface of the controller is configured to perform wired or wireless communication with external terminals. The wireless communication can be achieved through WIFI, mobile cellular network, near field communication (NFC) or other technologies. The computer program is executed by the processor to implement a vehicle temperature control method.

[0147] Those skilled in the art can understand that Figure 5 The structure shown in the above embodiment is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the controller to which the scheme of the present application is applied. The specific controller can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0148] In an example embodiment, a controller is provided, which can have an internal structure diagram as shown in

[0149] In an example embodiment, a vehicle is provided, which includes a heat pump air conditioner, a resistance heater, a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0150] In an example embodiment, a vehicle is provided, which includes a heat pump air conditioner, a resistance heater, a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0151] In an example embodiment, a computer readable storage medium is provided, which stores a computer program. The computer program is executed by a processor to implement the steps in the above method embodiments.

[0152] In an embodiment, a computer program product is provided, including a computer program which, when executed by a processor, implements the steps of any of the above method embodiments.

[0153] It should be noted that the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or authorized by all parties, and the collection, use and processing of related data need to comply with relevant regulations.

[0154] It can be understood by those skilled in the art that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. Any reference to memory, database or other medium used in the embodiments provided by the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided by the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided by the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., without being limited thereto.

[0155] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered to be within the scope of the present application.

[0156] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A vehicle temperature control method characterized by, The method comprises: acquiring a target heat load required by a vehicle; in a case where it is determined that a cooperative heating operation mode is entered, determining a reference operation parameter of a heat pump air conditioner corresponding to the target heat load according to a heating mapping relationship of the heat pump air conditioner in the vehicle, and controlling the heat pump air conditioner to perform heating according to the reference operation parameter; the heating mapping relationship records the relationship among different ambient temperatures, heat pump air conditioner operation parameters and heat loads; determining an initial power of an electric resistance heater in the vehicle based on the target heat load and a heat load provided by the heat pump air conditioner performing heating according to the reference operation parameter, and controlling the electric resistance heater to perform cooperative heating with the heat pump air conditioner according to the initial power; in the process of cooperative heating, in a case where the heat pump air conditioner supports independently covering the target heat load and meets a dynamic adjustment trigger condition, determining a power reduction gradient parameter; reducing the power of the electric resistance heater according to the power reduction gradient parameter, and dynamically adjusting a real-time operation parameter of the heat pump air conditioner until the electric resistance heater is turned off and the heat load independently provided by the heat pump air conditioner meets the target heat load.

2. The method of claim 1, wherein, in the process of cooperative heating, in a case where the heat pump air conditioner supports independently covering the target heat load and meets a dynamic adjustment trigger condition, determining a power reduction gradient parameter, comprising: in the process of cooperative heating, in a case where it is determined that the heat pump air conditioner supports independently covering the target heat load based on the heating mapping relationship, determining an output temperature of the heat pump air conditioner; in a case where the output temperature reaches a dynamic adjustment temperature threshold, determining a power reduction gradient parameter.

3. The method of claim 1, wherein, in a case where it is determined that a cooperative heating operation mode is entered, determining a reference operation parameter of a heat pump air conditioner corresponding to the target heat load according to a heating mapping relationship of the heat pump air conditioner in the vehicle, comprising at least one of the following: in a case where an ambient temperature of the vehicle is in a preset first temperature interval, controlling an electric resistance heater in the vehicle to perform cold start for the heat pump air conditioner, and in a case where the cold start is ended, determining that the cooperative heating operation mode is entered, determining a reference operation parameter of the heat pump air conditioner according to the target heat load, the ambient temperature and the heating mapping relationship of the heat pump air conditioner in the vehicle; in a case where an ambient temperature of the vehicle is in a preset second temperature interval, determining that the cooperative heating operation mode is entered, and determining a reference operation parameter of the heat pump air conditioner according to the target heat load, the ambient temperature and the heating mapping relationship of the heat pump air conditioner in the vehicle.

4. The method of claim 1, wherein, acquiring a target heat load required by a vehicle, comprising: acquiring a temperature parameter, a vehicle speed and an illumination intensity parameter of the vehicle; determining a vehicle temperature difference of the vehicle according to an indoor temperature in the temperature parameter and a set temperature; acquiring a condition coefficient of each of the vehicle temperature difference, the vehicle speed and the illumination intensity parameter; fusing the vehicle temperature difference, the vehicle speed and the illumination intensity parameter according to the condition coefficient of each to obtain the target heat load required by the vehicle.

5. The method of claim 4, wherein, acquiring a condition coefficient of each of the vehicle temperature difference, the vehicle speed and the illumination intensity parameter, comprising: Determine the initial condition coefficient corresponding to the vehicle temperature difference by excluding the influence of light and vehicle speed; Determine the initial condition coefficient corresponding to the light intensity parameter based on the initial condition coefficient corresponding to the vehicle temperature difference by excluding the influence of vehicle speed; Determine the initial condition coefficient corresponding to the vehicle speed based on the initial condition coefficient corresponding to the vehicle temperature difference and the initial condition coefficient corresponding to the light intensity parameter by excluding the influence of light; Dynamically verify the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the light intensity parameter, and the initial condition coefficient corresponding to the vehicle speed to obtain the condition coefficient of each of the vehicle temperature difference, the vehicle speed, and the light intensity parameter.

6. The method of claim 5, wherein, The dynamic verification of the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the light intensity parameter, and the initial condition coefficient corresponding to the vehicle speed to obtain the condition coefficient of each of the vehicle temperature difference, the vehicle speed, and the light intensity parameter includes: The dynamic verification of the initial condition coefficient corresponding to the vehicle temperature difference, the initial condition coefficient corresponding to the light intensity parameter, and the initial condition coefficient corresponding to the vehicle speed to obtain the calibration condition coefficient of each of the vehicle temperature difference, the vehicle speed, and the light intensity parameter; Based on the pre-calibrated heating performance curve of the heat pump air conditioner, correct the calibration condition coefficient of each of the vehicle temperature difference, the vehicle speed, and the light intensity parameter to obtain the condition coefficient of each of the vehicle temperature difference, the vehicle speed, and the light intensity parameter. The heating performance curve records the energy conversion efficiency of the compressor in the heat pump air conditioner under different working conditions.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: When the ambient temperature of the vehicle is in a preset third temperature interval, control the heat pump air conditioner to independently heat according to the target heat load.

8. The method according to any one of claims 1 to 6, characterized in that, The method further includes: Set different ambient temperatures and heat pump air conditioner working parameters, and determine the heat load provided by the heat pump air conditioner under different ambient temperatures and heat pump air conditioner working parameters; According to different ambient temperatures, heat pump air conditioner working parameters, and the heat load provided by the heat pump air conditioner, construct a heating mapping relationship of the heat pump air conditioner.

9. A vehicle temperature control device characterized by comprising: The device includes: A heat load acquisition module for acquiring a target heat load required by a vehicle; A heat pump air conditioner control module for determining a reference working parameter of the heat pump air conditioner corresponding to the target heat load according to a heating mapping relationship of the heat pump air conditioner in the vehicle when it is determined that the vehicle is in a cooperative heating working mode, and controlling the heat pump air conditioner to heat according to the reference working parameter; the heating mapping relationship records the relationship between different ambient temperatures, heat pump air conditioner working parameters, and heat loads; A heater control module for determining an initial power of an electric resistance heater in the vehicle based on the target heat load and the heat load provided by the heat pump air conditioner when heating according to the reference working parameter, and controlling the electric resistance heater to cooperatively heat with the heat pump air conditioner according to the initial power; A dynamic adjustment module is configured to determine a power reduction gradient parameter when the heat pump air conditioner supports independently covering the target heat load and meets a dynamic adjustment trigger condition during the cooperative heating process; reduce the power of the electric resistance heater according to the power reduction gradient parameter, and dynamically adjust real-time working parameters of the heat pump air conditioner until the electric resistance heater is turned off and the heat load independently provided by the heat pump air conditioner meets the target heat load.

10. A vehicle comprising a heat pump air conditioner, an electric resistance heater, a storage, and a processor, the storage storing a computer program, characterized by, The computer program, when executed by the processor, implements the steps of the method of any one of claims 1 to 8.

11. A computer readable storage medium having stored thereon a computer program, characterized in that The computer program, when executed by the processor, implements the steps of the method of any one of claims 1 to 8.

12. A computer program product comprising a computer program, characterized in that, The computer program, when executed by the processor, implements the steps of the method of any one of claims 1 to 8. The computer program, when executed by the processor, implements the steps of the method of any one of claims 1 to 8.

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