Electric vehicle thermal management control method, device and equipment and storage medium

Abstract

The invention discloses an electric vehicle heat management control method, device and equipment and a storage medium, and relates to the technical field of vehicle heat management.The electric vehicle heat management control method comprises the steps that under the condition that a vehicle air conditioner controller is in a refrigeration mode, the environment temperature, the in-vehicle temperature, the sunlight irradiation value and the set temperature are obtained; according to the environment temperature, the in-vehicle temperature, the sunlight irradiation value and the set temperature, the air outlet target temperature is obtained; the temperature of the evaporator is adjusted by controlling the refrigerating loop, and then the actual temperature of the air outlet is controlled; acquiring a temperature difference value between the actual temperature of the air outlet and the target temperature of the air outlet; and under the condition that the temperature difference value is larger than a preset temperature threshold value, the temperature of an air outlet is controlled through a heat source of the heating loop and by adjusting the opening degree of a temperature air door. The temperature of the air outlet is controlled by switching the heat source of the heating loop and adjusting the opening degree of the temperature air door, and the capacity consumption of the vehicle can be reduced while the comfort in the vehicle is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of vehicle thermal management technology, and in particular to electric vehicle thermal management control methods, devices, equipment and storage media. Background Art

[0002] In spring and autumn, the temperature fluctuates widely, the temperature difference between morning and evening is obvious, and the humidity is also high, which puts higher requirements on the control of automatic air conditioning. In addition, when the cooling demand of automatic air conditioning is not high in spring and autumn, and when it is running under other low-load conditions, even if the compressor is running at the lowest speed, the actual evaporator temperature is still much lower than the target evaporator temperature. At this time, in order to meet the comfort of the passenger compartment, the air passing through the evaporator needs to be heated to meet the needs of the passenger compartment. However, at this time, the compressor is cooling, and the air conditioning thermal management system with heat pump function can only run one working mode at the same time for compressor cooling and heating. At this time, the heat pump mode cannot be turned on, and heating can only be performed through PTC (Positive Temperature Coefficient) . The energy consumption of PTC is high, which will reduce the vehicle's endurance. Summary of the invention

[0003] The main purpose of the present application is to provide an electric vehicle thermal management control method, device, equipment and storage medium, aiming to solve the technical problem that the existing electric vehicle thermal management control scheme can only heat through PTC during the heating process, resulting in high vehicle energy consumption.

[0004] To achieve the above-mentioned purpose, the present application proposes a thermal management control method for an electric vehicle, which is applied to a vehicle air conditioning controller, wherein the vehicle air conditioning controller includes a refrigeration circuit and a heating circuit, wherein the refrigeration circuit includes an outdoor heat exchanger, a water-cooled heat exchanger, a compressor and a plurality of throttle valves, wherein the throttle valves are used to control the refrigerant flow through the outdoor heat exchanger, the evaporator and the refrigerator, respectively, and the heating circuit includes a plurality of proportional three-way valves, wherein the proportional three-way valves are used to adjust the heat source from the water-cooled heat exchanger to the heating circuit, and the thermal management control method for an electric vehicle includes:

[0005] When the vehicle air conditioning controller is in cooling mode, obtain the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature;

[0006] Obtaining an air outlet target temperature according to the ambient temperature, the vehicle interior temperature, the sunlight radiation value, and the set temperature;

[0007] By controlling the refrigeration circuit, the evaporator temperature is adjusted, thereby controlling the actual air outlet temperature;

[0008] Obtaining a temperature difference between the actual air outlet temperature and the target air outlet temperature;

[0009] When the temperature difference is greater than a preset temperature threshold, the temperature of the air outlet is controlled by using the heat source of the heating circuit and adjusting the opening of the temperature damper.

[0010] In one embodiment, the proportional three-way valve includes a first proportional three-way valve, a second proportional three-way valve and a third proportional three-way valve, the first end of the first proportional three-way valve is connected in series with the first end of the third proportional three-way valve, the first end of the second proportional three-way valve is connected in series with the second end of the third proportional three-way valve, and the second end of the first proportional three-way valve and the second end of the second proportional three-way valve are connected to the water-cooled heat exchanger respectively;

[0011] When the temperature difference is greater than a preset temperature threshold, the step of controlling the temperature of the air outlet by using the heat source of the heating circuit and adjusting the opening of the temperature damper includes:

[0012] When the temperature difference is greater than the preset temperature threshold, determining the compressor speed;

[0013] If the speed of the compressor is lower than a preset speed threshold, the first end and the second end of the first proportional three-way valve, the first end and the second end of the second proportional three-way valve, and the first end and the second end of the third proportional three-way valve are opened, thereby controlling the water-cooled heat exchanger to the heating circuit and mixing the air at the air outlet;

[0014] Based on the temperature difference, the opening of the temperature damper is adjusted to adjust the temperature of the air outlet, so that the temperature difference between the adjusted air outlet temperature and the air outlet target temperature reaches within the preset range.

[0015] In one embodiment, the step of adjusting the opening of the temperature damper based on the temperature difference includes:

[0016] Obtain the temperature difference value of the current cycle, the temperature difference value of the previous cycle, and the temperature difference value of the cycle before that;

[0017] Get proportional parameters, integral parameters and differential parameters;

[0018] The opening of the temperature damper is adjusted based on the temperature difference of the current cycle, the temperature difference of the previous cycle, the temperature difference of the previous cycle, the proportional parameter, the integral parameter and the differential parameter.

[0019] In one embodiment, the step of obtaining the target air outlet temperature according to the ambient temperature, the vehicle interior temperature, the sunlight radiation value and the set temperature comprises:

[0020] Obtain the temperature influence coefficient and the offset of the energy demand value in the vehicle;

[0021] Obtaining an in-vehicle energy demand value according to a temperature influence coefficient, an offset of the in-vehicle energy demand value, the ambient temperature, the in-vehicle temperature, the sunlight radiation value, and the set temperature;

[0022] The air outlet target temperature is obtained based on the in-vehicle energy demand value.

[0023] In one embodiment, the water-cooled heat exchanger is connected in parallel with a positive temperature coefficient thermistor, and the third end of the first proportional three-way valve and the third end of the second proportional three-way valve are connected to the positive temperature coefficient thermistor respectively;

[0024] After the step of mixing air at the air outlet, the method further includes:

[0025] If it is detected that the heating demand is higher than the preset demand threshold, the second end of the first proportional three-way valve and the second end of the second proportional three-way valve are closed, and the third end of the first proportional three-way valve and the third end of the second proportional three-way valve are opened, thereby switching the positive temperature coefficient thermistor to the heating circuit and mixing the air at the air outlet.

[0026] In one embodiment, the step of adjusting the evaporator temperature by controlling the refrigeration circuit and thereby controlling the actual temperature of the air outlet comprises:

[0027] Fully open the first throttle valve, and control the refrigerant flow entering the evaporator and the refrigerator by adjusting the opening of the second throttle valve and the third throttle valve;

[0028] The refrigerant is allowed to flow through the compressor, the water-cooled heat exchanger, the outdoor heat exchanger, the second throttle valve and the evaporator in sequence;

[0029] The evaporator temperature is thereby adjusted, thereby controlling the actual temperature of the air outlet.

[0030] In one embodiment, after the step of obtaining the temperature difference between the actual air outlet temperature and the target air outlet temperature, the method further includes:

[0031] When the temperature difference is less than or equal to the preset temperature threshold, the temperature damper opening and the air outlet temperature are kept unchanged.

[0032] In addition, to achieve the above-mentioned purpose, the present application also proposes a thermal management control device for an electric vehicle, the thermal management control device for an electric vehicle comprising:

[0033] An acquisition module, used to acquire the ambient temperature, the vehicle interior temperature, the sunlight radiation value and the set temperature when the vehicle air conditioning controller is in a cooling mode;

[0034] A calculation module, used for obtaining a target air outlet temperature according to the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature;

[0035] A control module, used to adjust the evaporator temperature by controlling the refrigeration circuit, thereby controlling the actual air outlet temperature;

[0036] The calculation module is further used to obtain the temperature difference between the actual temperature of the air outlet and the target temperature of the air outlet;

[0037] The control module is also used to control the temperature of the air outlet through the heat source of the heating circuit and adjusting the opening of the temperature damper when the temperature difference is greater than a preset temperature threshold.

[0038] In addition, to achieve the above-mentioned purpose, the present application also proposes an electric vehicle thermal management control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the electric vehicle thermal management control method as described above.

[0039] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the electric vehicle thermal management control method as described above are implemented.

[0040] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the electric vehicle thermal management control method as described above are implemented.

[0041] One or more technical solutions proposed in this application are to obtain the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature when the vehicle air conditioning controller is in the cooling mode; obtain the target temperature of the air outlet according to the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature; adjust the evaporator temperature by controlling the refrigeration circuit to control the actual temperature of the air outlet; obtain the temperature difference between the actual temperature of the air outlet and the target temperature of the air outlet; and control the temperature of the air outlet by the heat source of the heating circuit and the opening of the temperature damper when the temperature difference is greater than the preset temperature threshold. Based on the temperature difference between the actual temperature of the air outlet and the target temperature, the temperature of the air outlet is controlled by the heat source of the heating circuit and the opening of the temperature damper, thereby achieving precise control of the temperature inside the vehicle and reducing the energy consumption of the vehicle while ensuring the comfort inside the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0044] Figure 1 A schematic diagram of a flow chart provided for Embodiment 1 of the electric vehicle thermal management control method of the present application;

[0045] Figure 2 This is a schematic diagram of the specific principle of the connection relationship in an embodiment of the electric vehicle thermal management control method of the present application;

[0046] Figure 3 A flow chart of the second embodiment of the electric vehicle thermal management control method provided in this application;

[0047] Figure 4 A flow chart of the third embodiment of the electric vehicle thermal management control method of the present application;

[0048] Figure 5 This is a schematic diagram of the module structure of the thermal management control device for an electric vehicle according to an embodiment of the present application;

[0049] Figure 6 Schematic diagram of the equipment structure of the hardware operating environment involved in the electric vehicle thermal management control method in the embodiment of the present application.

[0050] Description of Figure Numbers:

[0051] The first proportional three-way valve A1, the second proportional three-way valve A2, the third proportional three-way valve A3, the first throttle valve B1, the second throttle valve B2, the third throttle valve B3, the first water pump C1, the second water pump C2, the first refrigerator D1, the second refrigerator D2, the positive temperature coefficient thermistor 10, the water-cooled heat exchanger 20, the compressor 30, the outdoor heat exchanger 40, the evaporator 50, the heater core 60, and the battery pack 70.

[0052] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0054] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0055] The main solutions of the embodiments of this application are:

[0056] Since the existing technology has low cooling demand in spring and autumn, and when operating under other low-load conditions, even if the compressor is running at the lowest speed, the actual evaporator temperature is still much lower than the target evaporator temperature. At this time, in order to meet the comfort of the passenger compartment, the air passing through the evaporator needs to be heated to meet the needs of the passenger compartment. However, at this time, the compressor is cooling, and the air conditioning thermal management system with a heat pump function can only run one working mode at the same time, and the heat pump mode cannot be turned on at this time. Heating can only be performed through PTC. The energy consumption of PTC is high, which will reduce the vehicle's endurance.

[0057] The present application provides a solution, which controls the temperature of the air outlet based on the temperature difference between the actual temperature and the target temperature of the air outlet through the heat source of the heating circuit and by adjusting the opening of the temperature damper, thereby achieving precise control of the temperature inside the vehicle and reducing the energy consumption of the vehicle while ensuring the comfort inside the vehicle.

[0058] It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, an electric vehicle thermal management control device, etc. The following takes the electric vehicle thermal management control device as an example to illustrate this embodiment and the following embodiments.

[0059] Based on this, the present application embodiment provides a thermal management control method for an electric vehicle, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the thermal management control method for an electric vehicle of the present application.

[0060] In this embodiment, the electric vehicle thermal management control method is applied to a vehicle air conditioning controller, which includes a refrigeration circuit and a heating circuit. The refrigeration circuit includes an outdoor heat exchanger, a water-cooled heat exchanger, a compressor and a plurality of throttle valves. The throttle valves are used to control the refrigerant flow through the outdoor heat exchanger, the evaporator and the refrigerator respectively. The heating circuit includes a plurality of proportional three-way valves, which are used to adjust the heat source from the water-cooled heat exchanger to the heating circuit. For specific schematic diagrams, please refer to Figure 2 , the method comprises steps S10 to S50:

[0061] Step S10: When the vehicle air conditioning controller is in cooling mode, obtain the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature.

[0062] It should be noted that the application scenario of the present application is usually when the cooling demand is not high, but the cooling mode of the vehicle air-conditioning controller makes the temperature inside the vehicle too low, making the comfort level of the passengers inside the vehicle not high.

[0063] In addition, the ambient temperature refers to the air temperature outside the car. The ambient temperature has a direct impact on the energy demand inside the car because it determines how much work the air conditioning system needs to do to achieve the set temperature inside the car. For example, on a hot summer day, the ambient temperature is higher and the air conditioning system needs more energy to cool the interior space.

[0064] In addition, the interior temperature refers to the actual temperature inside the car. The interior temperature is the core input quantity of the closed-loop control of the automatic air-conditioning system, which directly affects the comfort of the passengers and the control response of the air-conditioning system.

[0065] In addition, the sunlight radiation value refers to the intensity of sunlight shining on the car. The sunlight radiation value will affect the temperature inside the car, especially in summer, when direct sunlight can cause the temperature inside the car to rise rapidly, thereby increasing the load on the air-conditioning system.

[0066] In addition, the set temperature refers to the ideal in-car temperature set by the user. The set temperature is the working target of the air-conditioning system. The system will adjust the working state of the air-conditioning according to the difference between the set temperature and the current in-car temperature to meet the comfort needs of the passengers.

[0067] Step S20: obtaining an air outlet target temperature according to the ambient temperature, the vehicle interior temperature, the sunlight radiation value and the set temperature.

[0068] It should be noted that the in-vehicle energy demand value can be first obtained according to the ambient temperature, the in-vehicle temperature, the sunlight radiation value, the set temperature, the temperature influence coefficient and the in-vehicle energy demand value offset, and then the air outlet target temperature is obtained by looking up the table according to the in-vehicle energy demand value, that is, the temperature influence coefficient and the in-vehicle energy demand value offset are obtained; the in-vehicle energy demand value (EnergyReq) is obtained according to the temperature influence coefficient, the in-vehicle energy demand value offset, the ambient temperature, the in-vehicle temperature, the sunlight radiation value and the set temperature; and the air outlet target temperature is obtained based on the in-vehicle energy demand value.

[0069] In addition, the temperature influence coefficient is a proportional coefficient used to adjust the influence of each parameter on the total energy demand value, which can usually include K1, K2, K3 and K4. The in-vehicle energy demand value offset usually refers to a baseline energy demand value used to calibrate or adjust the calculation results to adapt to specific vehicle or environmental conditions.

[0070] In addition, the in-vehicle energy demand value is usually an indicator that measures the energy required by the in-vehicle air conditioning or heating system, which reflects the energy required to maintain the set temperature in the vehicle. This demand value is usually calculated by the vehicle's thermal management system based on the current vehicle internal and external environmental conditions to ensure the comfort of the in-vehicle temperature and the satisfaction of the passengers.

[0071] In addition, the calculation process of the in-vehicle energy demand value is EnergyReq = in-vehicle energy demand value offset + (light temperature × K1) + (set temperature × K2) + (ambient temperature × K3) + (set temperature - in-vehicle temperature) × K4. It can be understood that each item in the above calculation process reflects different factors affecting the in-vehicle energy demand. For example, if the main driver's light temperature is very high, the air conditioning system needs more energy to reduce the in-vehicle temperature so that the occupants feel comfortable. Similarly, if the ambient temperature is very high, the air conditioning system also needs more energy to maintain the set in-vehicle temperature. The greater the difference between the main driver's set temperature and the in-vehicle temperature, the more work the air conditioning system needs to do to reach the set temperature. Therefore, K4 will multiply this difference to adjust the total energy demand. In addition, the K1, K2, K3, and K4 coefficients in the above calculation process need to be determined based on actual vehicle performance and test data. These coefficients may vary due to factors such as vehicle design, thermal insulation performance of the passenger compartment, and efficiency of the air conditioning system.

[0072] Specifically, the process of obtaining the target air outlet temperature based on the in-vehicle energy demand table is usually to consult relevant standards or technical documents based on the calculated energy demand value. These documents may contain target air outlet temperatures corresponding to different energy demand values, thereby obtaining the target air outlet temperature.

[0073] In addition, the target air outlet temperature refers to the target temperature of the air at the air outlet when the air conditioning system is running. This target value is usually set by the user through the air conditioning control panel. It indicates the temperature conditions that the air conditioning system needs to reach in order to provide a comfortable environment in the car.

[0074] Step S30: adjusting the evaporator temperature by controlling the refrigeration circuit, thereby controlling the actual air outlet temperature.

[0075] It should be noted that the refrigeration circuit is controlled to adjust the evaporator temperature mainly by fully opening the first throttle valve, and controlling the refrigerant flow entering the evaporator and the refrigerator by adjusting the opening of the second throttle valve and the third throttle valve; the refrigerant flow is made to flow through the compressor, the water-cooled heat exchanger, the outdoor heat exchanger, the second throttle valve and the evaporator in sequence; thereby adjusting the evaporator temperature and further controlling the actual outlet temperature.

[0076] Specifically, please refer to Figure 2 , fully open the electronic expansion valve 1, and adjust the opening of the electronic expansion valve 2 and the electronic expansion valve 3 to adjust the refrigerant flow entering the evaporator and the refrigerator Chiller 1 respectively, so as to achieve the cooling of the car and the battery. Specifically: after the refrigerant passes through the compressor, it is a high-temperature and high-pressure gas. After flowing through the water-cooled heat exchanger, the temperature of the water-cooled heat exchanger will increase; after flowing through the outdoor heat exchanger, it becomes a high-temperature and high-pressure liquid; after flowing through the electronic expansion valve 2, it is throttled and reduced in pressure to become a low-temperature and low-pressure liquid, and absorbs heat in the evaporator to become a gas, thereby reducing the evaporator temperature, and then controlling the actual temperature of the air outlet to decrease, thereby cooling the car.

[0077] In addition, the electronic expansion valve is an advanced throttling valve, mainly used in refrigeration equipment to accurately control the refrigerant flow entering the evaporator. Compared with traditional throttling elements (such as capillary tubes, thermal expansion valves, etc.), it can better meet the requirements of comfort and energy saving in occasions with drastic load changes or a wide range of operating conditions. The electronic expansion valve has a fast response speed and can complete the adjustment from fully open to fully closed in a very short time to adapt to the rapid changes in system load.

[0078] In addition, the refrigeration circuit is a key component in the refrigeration system. It refers to the path of the refrigerant circulating in the system. This cycle usually includes four basic processes: compression, condensation, throttling and evaporation. The purpose of the refrigeration circuit is to transfer heat from one place (such as inside the car) to another place (such as outside the car) to achieve a cooling effect.

[0079] In addition, refrigerant is a substance used to absorb and release heat through phase change in the refrigeration system. It absorbs heat in the evaporator, cools the fluid (such as air or water), and then releases heat in the condenser, achieving a refrigeration effect through this cycle.

[0080] In addition, the compressor is the heart of the refrigeration system, responsible for compressing low-temperature and low-pressure refrigerant vapor, increasing its pressure and temperature, and is responsible for sucking and compressing the refrigerant vapor in the evaporator into high-pressure hot steam to provide power for the refrigerant cycle. According to the working principle, compressors can be divided into reciprocating, rotary, screw, centrifugal and other types.

[0081] In addition, the evaporator is a key heat exchange device in the refrigeration system. Its function is to make the refrigerant absorb the heat of the cooled medium (such as air or water) and evaporate. In the evaporator, the low-pressure and low-temperature refrigerant liquid evaporates into steam by absorbing heat, thereby reducing the temperature of the medium flowing through the evaporator. The evaporator can be a direct evaporation type or an indirect evaporation type, such as the shell and tube evaporator used in the cooling water system.

[0082] In addition, a chiller is a device used to generate and maintain a low temperature environment. It is widely used in industrial, commercial and residential fields to provide cooling effects. Its working principle is based on the circulation of refrigerant. Through the processes of compression, condensation, throttling and evaporation, heat is transferred from a low temperature environment to a high temperature environment, thereby achieving the purpose of cooling.

[0083] In addition, a water-cooled heat exchanger is a heat exchange device that uses water as a cooling medium. It can be a condenser or an evaporator. In a water-cooled condenser, high-temperature and high-pressure refrigerant vapor is cooled into liquid, and the released heat is absorbed and carried away by water; in a water-cooled evaporator, the refrigerant evaporates in it, absorbing heat from the water and causing the water temperature to drop.

[0084] In addition, the outdoor heat exchanger is an important part of the vehicle air conditioning system. It is mainly responsible for cooling and condensing the high-temperature and high-pressure refrigerant gas generated by the compressor into high-pressure liquid in the refrigeration cycle. The actual outlet temperature refers to the actual temperature of the air at the outlet of the automobile air conditioning system. It is one of the key parameters to measure the performance of the air conditioning system and directly affects the comfort of passengers.

[0085] Step S40: obtaining a temperature difference between the actual air outlet temperature and the target air outlet temperature.

[0086] It should be noted that the temperature difference between the actual outlet temperature and the target outlet temperature is an absolute value, which lays a solid foundation for the subsequent steps.

[0087] Step S50: When the temperature difference is greater than a preset temperature threshold, the temperature of the air outlet is controlled by the heat source of the heating circuit and by adjusting the opening of the temperature damper.

[0088] It should be noted that the preset temperature threshold is usually set by the user according to his or her own needs and habits. Specifically, when the temperature difference is less than or equal to the preset temperature threshold, it can be determined that the user is relatively satisfied with the temperature inside the car, making the passengers in the car feel more comfortable.

[0089] In addition, the heat source of the heating circuit can usually be divided into PTC and water-cooled heat exchanger, which can be referred to Figure 2 , the electric vehicle thermal management control device will switch the PTC or water-cooled heat exchanger to the heating circuit according to demand to provide a heat source.

[0090] In addition, the temperature damper is a component used in the car air conditioning system, and its main function is to adjust the temperature of the air. It mixes the cold and hot air by controlling the opening degree of the damper, thereby adjusting the temperature of the air outlet.

[0091] In addition, when the opening of the temperature damper is adjusted to the full cold position, the temperature damper will block the air heated by the heat source, so that the air passing through the evaporator can flow directly to the air outlet, and the air flowing to the air outlet is cold air; when the opening of the temperature damper is adjusted to the full hot position, the temperature damper will block the air flowing out of the evaporator and make it all flow to the heat source for heating, so that the air flowing to the air outlet is hot air; when the opening of the temperature damper is adjusted to the cold and hot mixed position, the temperature damper will control part of the air to flow through the heat source for heating, and part of the air not to flow through the heat source for heating, so that the air at the air outlet is a mixture of cold and hot air. Furthermore, the ratio of cold and hot air can be controlled by more finely adjusting the opening of the temperature damper, so that the temperature of the air outlet can be more accurately controlled by adjusting the opening of the temperature damper.

[0092] It can be understood that when the temperature difference is less than or equal to the preset temperature threshold, that is, the user is very satisfied with the actual temperature in the car and the temperature comfort level in the car is high, the temperature damper opening and the air outlet temperature are kept unchanged.

[0093] This embodiment provides a thermal management control method for an electric vehicle. When the vehicle air conditioning controller is in cooling mode, the ambient temperature, the temperature inside the vehicle, the sunlight radiation value, and the set temperature are obtained; the target temperature of the air outlet is obtained according to the ambient temperature, the temperature inside the vehicle, the sunlight radiation value, and the set temperature; the evaporator temperature is adjusted by controlling the refrigeration circuit to control the actual temperature of the air outlet; the temperature difference between the actual temperature of the air outlet and the target temperature of the air outlet is obtained; when the temperature difference is greater than a preset temperature threshold, the temperature of the air outlet is controlled by the heat source of the heating circuit and the opening of the temperature damper. Based on the temperature difference between the actual temperature of the air outlet and the target temperature, the temperature of the air outlet is controlled by the heat source of the heating circuit and the opening of the temperature damper, thereby achieving precise control of the temperature inside the vehicle, and reducing the energy consumption of the vehicle while ensuring the comfort inside the vehicle.

[0094] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 3 , step S20 includes steps S201 to S203:

[0095] Step S201: when the temperature difference is greater than the preset temperature threshold, determine the compressor speed.

[0096] It should be noted that the speed of the compressor can reflect the heating demand. It is understandable that if the compressor speed is low, it may be that the user has adjusted the air conditioning system to energy-saving mode.

[0097] Step S202: If the compressor speed is lower than the preset speed threshold, open the first and second ends of the first proportional three-way valve, the first and second ends of the second proportional three-way valve, and the first and second ends of the third proportional three-way valve, so as to control the water-cooled heat exchanger to the heating circuit and mix the air at the air outlet.

[0098] It should be noted that, please refer to Figure 2 The proportional three-way valve includes a first proportional three-way valve, a second proportional three-way valve and a third proportional three-way valve, the first end of the first proportional three-way valve is connected in series with the first end of the third proportional three-way valve, the first end of the second proportional three-way valve is connected in series with the second end of the third proportional three-way valve, and the second end of the first proportional three-way valve and the second end of the second proportional three-way valve are respectively connected to the water-cooled heat exchanger.

[0099] In addition, if the compressor speed is lower than the preset speed threshold, that is, the compressor speed is low, it may be because the temperature inside the vehicle has approached or reached the set comfort temperature, so the air conditioning system does not need to run at high power to provide additional heat. In addition, since the temperature of the water-cooled heat exchanger is high during cooling, the water-cooled heat exchanger can be controlled to the heating circuit to provide a heat source. For details, please refer to Figure 2 , respectively open the 1st and 2nd interfaces of the proportional three-way valve 1, the 1st and 2nd interfaces of the proportional three-way valve 2, and the 1st and 2nd interfaces of the proportional three-way valve 3, thereby controlling the water-cooled heat exchanger to the heating circuit, and providing a heat source for the thermal management control equipment of the electric vehicle, and then mixing the air at the air outlet.

[0100] It can be understood that this method of switching the water-cooled heat exchanger to the heating circuit to provide a heat source reduces the energy consumption of the vehicle.

[0101] In addition, the water-cooled heat exchanger is connected in parallel with a positive temperature coefficient thermistor, and the third end of the first proportional three-way valve and the third end of the second proportional three-way valve are respectively connected to the positive temperature coefficient thermistor; if it is detected that the heating demand is higher than the preset demand threshold, the second end of the first proportional three-way valve and the second end of the second proportional three-way valve are closed, and the third end of the first proportional three-way valve and the third end of the second proportional three-way valve are opened, thereby switching the positive temperature coefficient thermistor to the heating circuit and mixing the air at the air outlet.

[0102] In addition, when the heating demand is higher than the preset demand threshold, that is, when the heat of the water-cooled heat exchanger is not enough to meet the required heating demand, the 2nd interface of the proportional three-way valve 1 and the 2nd interface of the proportional three-way valve 2 are closed, and the 3rd interface of the proportional three-way valve 1 and the 3rd interface of the proportional three-way valve 2 are opened respectively, so as to switch the PTC to the heating circuit to provide a higher heat source, and then mix the air at the air outlet. For details, please refer to Figure 2 .

[0103] Step S203: Based on the temperature difference, adjusting the opening of the temperature damper to adjust the temperature of the air outlet, so that the temperature difference between the adjusted air outlet temperature and the air outlet target temperature reaches within the preset range.

[0104] It should be noted that the target opening of the temperature damper can be obtained based on the temperature difference, and then the opening of the temperature damper can be adjusted to adjust the mixed air ratio, so as to more accurately control the temperature of the air outlet, so that the temperature difference between the adjusted air outlet temperature and the air outlet target temperature reaches within the preset range, that is, the effect of passengers in the car still feeling a comfortable temperature is achieved.

[0105] In this embodiment, when the temperature difference is greater than the preset temperature threshold, the compressor speed is judged; if the compressor speed is lower than the preset speed threshold, the first end and the second end of the first proportional three-way valve, the first end and the second end of the second proportional three-way valve, and the first end and the second end of the third proportional three-way valve are opened, so as to control the water-cooled heat exchanger to the heating circuit and mix the air at the air outlet; based on the temperature difference, the opening of the temperature damper is adjusted to adjust the temperature of the air outlet, so that the temperature difference between the adjusted air outlet temperature and the air outlet target temperature is within the preset range. The technical effect of reducing the energy consumption of the vehicle while ensuring the comfort inside the vehicle is achieved.

[0106] Based on the first and second embodiments of the present application, in the third embodiment of the present application, the same or similar contents as those in the first and second embodiments can be referred to the above description, and will not be described in detail later. Figure 4 , step S203 may further include steps S21 to S23:

[0107] Step S21: Obtain the temperature difference value of the current cycle, the temperature difference value of the previous cycle, and the temperature difference value of the cycle before that.

[0108] It should be noted that the purpose of obtaining the temperature difference of the current cycle, the temperature difference of the previous cycle, and the temperature difference of the previous cycle is to subsequently obtain the temperature damper target opening through a PID (Proportional Integral Derivative) algorithm.

[0109] Step S22: Obtain proportional parameters, integral parameters and differential parameters.

[0110] It should be noted that the proportional parameter is the proportional gain Kp in the PID algorithm; the integral parameter is the integral gain Ki in the PID algorithm; and the differential parameter is the differential gain Kd in the PID algorithm.

[0111] Step S23: adjusting the opening of the temperature damper based on the temperature difference of the current cycle, the temperature difference of the previous cycle, the temperature difference of the previous cycle, the proportional parameter, the integral parameter and the differential parameter.

[0112] Specifically, the calculation process of the target opening Pos_Set of the temperature damper is obtained by the PID algorithm formula, that is, Pos_Set = Pos_Current + Kp (ΔT(k) - ΔT(k-1)) + Ki*ΔT(k) + Kd (ΔT(k) - 2*ΔT(k-1) + ΔT(k-2)), wherein Pos_Current is the current opening of the temperature damper, ΔT(k) is the temperature difference when sampling in this cycle, ΔT(k-1) is the temperature difference when sampling in the previous cycle, and ΔT(k-2) is the temperature difference when sampling in the previous cycle. When the target opening of the temperature damper is obtained, the opening of the temperature damper can be adjusted according to the target opening to control the outlet temperature.

[0113] This embodiment obtains the temperature difference of the current cycle, the temperature difference of the previous cycle, and the temperature difference of the previous cycle; obtains the proportional parameter, integral parameter, and differential parameter; adjusts the opening of the temperature damper based on the temperature difference of the current cycle, the temperature difference of the previous cycle, the temperature difference of the previous cycle, the proportional parameter, the integral parameter, and the differential parameter. The target opening of the temperature damper is obtained based on the PID algorithm, thereby achieving the technical effect of more accurately controlling the outlet temperature while reducing data errors.

[0114] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the thermal management control method of the electric vehicle of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0115] This application also provides a thermal management control device for an electric vehicle, please refer to Figure 5 , the electric vehicle thermal management control device comprises:

[0116] The acquisition module 10 is used to acquire the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature when the vehicle air conditioning controller is in the cooling mode.

[0117] The calculation module 20 is used to obtain the target air outlet temperature according to the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature.

[0118] The control module 30 is used to adjust the evaporator temperature by controlling the refrigeration circuit, thereby controlling the actual temperature of the air outlet.

[0119] The calculation module 20 is further used to obtain the temperature difference between the actual temperature of the air outlet and the target temperature of the air outlet.

[0120] The control module 30 is further configured to control the temperature of the air outlet through the heat source of the heating circuit and by adjusting the opening of the temperature damper when the temperature difference is greater than a preset temperature threshold.

[0121] The electric vehicle thermal management control device provided by the present application adopts the electric vehicle thermal management control method in the above embodiment, which can solve the technical problem that the existing electric vehicle thermal management control scheme can only heat through PTC during the heating process, resulting in high vehicle energy consumption. Compared with the prior art, the beneficial effects of the electric vehicle thermal management control device provided by the present application are the same as the beneficial effects of the electric vehicle thermal management control method provided by the above embodiment, and the other technical features in the electric vehicle thermal management control device are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0122] In one embodiment, the control module 30 is also used to determine the compressor speed when the temperature difference is greater than the preset temperature threshold; if the compressor speed is lower than the preset speed threshold, the first end and the second end of the first proportional three-way valve, the first end and the second end of the second proportional three-way valve, and the first end and the second end of the third proportional three-way valve are opened, so as to control the water-cooled heat exchanger to the heating circuit and mix the air at the air outlet; based on the temperature difference, the opening of the temperature damper is adjusted to adjust the temperature of the air outlet so that the temperature difference between the adjusted air outlet temperature and the air outlet target temperature reaches within the preset range.

[0123] In one embodiment, the control module 30 is also used to obtain the temperature difference of the current cycle, the temperature difference of the previous cycle, and the temperature difference of the previous cycle; obtain proportional parameters, integral parameters, and differential parameters; and adjust the opening of the temperature damper based on the temperature difference of the current cycle, the temperature difference of the previous cycle, the temperature difference of the previous cycle, the proportional parameters, the integral parameters, and the differential parameters.

[0124] In one embodiment, the acquisition module 10 is also used to obtain the temperature influence coefficient and the in-vehicle energy demand value offset; the in-vehicle energy demand value is obtained according to the temperature influence coefficient, the in-vehicle energy demand value offset, the ambient temperature, the in-vehicle temperature, the sunlight radiation value and the set temperature; and the air outlet target temperature is obtained based on the in-vehicle energy demand value.

[0125] In one embodiment, the control module 30 is also used to close the second end of the first proportional three-way valve and the second end of the second proportional three-way valve if it is detected that the heating demand is higher than a preset demand threshold, and open the third end of the first proportional three-way valve and the third end of the second proportional three-way valve, thereby switching the positive temperature coefficient thermistor to the heating circuit and mixing the air at the air outlet.

[0126] In one embodiment, the control module 30 is also used to fully open the first throttle valve, and control the refrigerant flow entering the evaporator and the refrigerator by adjusting the opening of the second throttle valve and the third throttle valve; so that the refrigerant flow passes through the compressor, the water-cooled heat exchanger, the outdoor heat exchanger, the second throttle valve and the evaporator in sequence; thereby adjusting the evaporator temperature and further controlling the actual outlet temperature.

[0127] In one embodiment, the control module 30 is further configured to keep the temperature damper opening and the air outlet temperature unchanged when the temperature difference is less than or equal to the preset temperature threshold.

[0128] The present application provides an electric vehicle thermal management control device, which includes: at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the electric vehicle thermal management control method in the above-mentioned embodiment one.

[0129] Reference below Figure 6 , which shows a schematic diagram of the structure of an electric vehicle thermal management control device suitable for implementing the embodiment of the present application. The electric vehicle thermal management control device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The electric vehicle thermal management control device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0130] like Figure 6As shown, the electric vehicle thermal management control device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the electric vehicle thermal management control device are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the electric vehicle thermal management control device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows an electric vehicle thermal management control device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0131] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0132] The electric vehicle thermal management control device provided by the present application adopts the electric vehicle thermal management control method in the above embodiment, which can solve the technical problem that the existing electric vehicle thermal management control scheme can only heat through PTC during the heating process, resulting in high vehicle energy consumption. Compared with the prior art, the beneficial effects of the electric vehicle thermal management control device provided by the present application are the same as the beneficial effects of the electric vehicle thermal management control method provided by the above embodiment, and the other technical features in the electric vehicle thermal management control device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0133] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0134] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0135] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the electric vehicle thermal management control method in the above-mentioned embodiment.

[0136] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0137] The computer-readable storage medium may be included in the thermal management control device of the electric vehicle; or may exist independently without being assembled into the thermal management control device of the electric vehicle.

[0138] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the electric vehicle thermal management control device, the electric vehicle thermal management control device: when the vehicle air-conditioning controller is in cooling mode, obtains the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature; obtains the target air outlet temperature according to the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature; adjusts the evaporator temperature by controlling the refrigeration circuit, thereby controlling the actual air outlet temperature; obtains the temperature difference between the actual air outlet temperature and the target air outlet temperature; and when the temperature difference is greater than a preset temperature threshold, controls the temperature of the air outlet by using the heat source of the heating circuit and adjusting the opening of the temperature damper.

[0139] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0140] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0141] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0142] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned electric vehicle thermal management control method, and can solve the technical problem that the existing electric vehicle thermal management control scheme can only heat through PTC during the heating process, resulting in high vehicle energy consumption. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the electric vehicle thermal management control method provided by the above-mentioned embodiment, and will not be repeated here.

[0143] The present application also provides a computer program product, including a computer program, which implements the steps of the electric vehicle thermal management control method as described above when executed by a processor.

[0144] The computer program product provided by the present application can solve the technical problem that the existing electric vehicle thermal management control solution can only heat through PTC during the heating process, resulting in high vehicle energy consumption. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the electric vehicle thermal management control method provided by the above embodiment, which will not be repeated here.

[0145] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A thermal management control method for an electric vehicle, characterized in that: The electric vehicle thermal management control method is applied to a vehicle air conditioning controller, the vehicle air conditioning controller includes a refrigeration circuit and a heating circuit, the refrigeration circuit includes an outdoor heat exchanger, a water-cooled heat exchanger, a compressor and a plurality of throttle valves, the throttle valves are used to control the refrigerant flow through the outdoor heat exchanger, the evaporator and the refrigerator respectively, the heating circuit includes a plurality of proportional three-way valves, the proportional three-way valves are used to adjust the water-cooled heat exchanger to the heat source of the heating circuit, the method includes: When the vehicle air conditioning controller is in cooling mode, obtain the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature; Obtaining an air outlet target temperature according to the ambient temperature, the vehicle interior temperature, the sunlight radiation value, and the set temperature; By controlling the refrigeration circuit, the evaporator temperature is adjusted, thereby controlling the actual air outlet temperature; Obtaining a temperature difference between the actual air outlet temperature and the target air outlet temperature; When the temperature difference is greater than a preset temperature threshold, the temperature of the air outlet is controlled by using the heat source of the heating circuit and adjusting the opening of the temperature damper.

2. The method according to claim 1, characterized in that The proportional three-way valve comprises a first proportional three-way valve, a second proportional three-way valve and a third proportional three-way valve, wherein the first end of the first proportional three-way valve is connected in series with the first end of the third proportional three-way valve, the first end of the second proportional three-way valve is connected in series with the second end of the third proportional three-way valve, and the second end of the first proportional three-way valve and the second end of the second proportional three-way valve are connected to the water-cooled heat exchanger respectively; When the temperature difference is greater than a preset temperature threshold, the step of controlling the temperature of the air outlet by using the heat source of the heating circuit and adjusting the opening of the temperature damper includes: When the temperature difference is greater than the preset temperature threshold, determining the compressor speed; If the speed of the compressor is lower than a preset speed threshold, the first end and the second end of the first proportional three-way valve, the first end and the second end of the second proportional three-way valve, and the first end and the second end of the third proportional three-way valve are opened, thereby controlling the water-cooled heat exchanger to the heating circuit and mixing the air at the air outlet; Based on the temperature difference, the opening of the temperature damper is adjusted to adjust the temperature of the air outlet, so that the temperature difference between the adjusted air outlet temperature and the air outlet target temperature reaches within the preset range.

3. The method according to claim 2, characterized in that The step of adjusting the opening of the temperature damper based on the temperature difference comprises: Obtain the temperature difference value of the current cycle, the temperature difference value of the previous cycle, and the temperature difference value of the cycle before that; Get proportional parameters, integral parameters and differential parameters; The opening of the temperature damper is adjusted based on the temperature difference of the current cycle, the temperature difference of the previous cycle, the temperature difference of the previous cycle, the proportional parameter, the integral parameter and the differential parameter.

4. The method according to claim 1, characterized in that The step of obtaining the target air outlet temperature according to the ambient temperature, the vehicle interior temperature, the sunlight radiation value and the set temperature comprises: Obtain the temperature influence coefficient and the offset of the energy demand value in the vehicle; Obtaining an in-vehicle energy demand value according to a temperature influence coefficient, an offset of the in-vehicle energy demand value, the ambient temperature, the in-vehicle temperature, the sunlight radiation value, and the set temperature; The air outlet target temperature is obtained based on the in-vehicle energy demand value.

5. The method according to claim 2, characterized in that The water-cooled heat exchanger is connected in parallel with a positive temperature coefficient thermistor, and the third end of the first proportional three-way valve and the third end of the second proportional three-way valve are connected to the positive temperature coefficient thermistor respectively; After the step of mixing air at the air outlet, the method further includes: If it is detected that the heating demand is higher than the preset demand threshold, the second end of the first proportional three-way valve and the second end of the second proportional three-way valve are closed, and the third end of the first proportional three-way valve and the third end of the second proportional three-way valve are opened, thereby switching the positive temperature coefficient thermistor to the heating circuit and mixing the air at the air outlet.

6. The method according to claim 1, characterized in that The step of adjusting the evaporator temperature by controlling the refrigeration circuit and thus controlling the actual temperature of the air outlet comprises: The first throttle valve is fully opened, and the refrigerant flow entering the evaporator and the refrigerator is controlled by adjusting the opening of the second throttle valve and the third throttle valve; The refrigerant is allowed to flow successively through the compressor, the water-cooled heat exchanger, the outdoor heat exchanger, the second throttle valve and the evaporator; The evaporator temperature is thereby adjusted, thereby controlling the actual temperature of the air outlet.

7. The method according to claim 1, characterized in that After the step of obtaining the temperature difference between the actual air outlet temperature and the target air outlet temperature, the method further includes: When the temperature difference is less than or equal to the preset temperature threshold, the temperature damper opening and the air outlet temperature are kept unchanged.

8. A thermal management control device for an electric vehicle, characterized in that: The electric vehicle thermal management control device comprises: An acquisition module, used to acquire the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature when the vehicle air conditioning controller is in a cooling mode; A calculation module, used for obtaining a target air outlet temperature according to the ambient temperature, the temperature inside the vehicle, the sunlight radiation value and the set temperature; A control module, used to adjust the evaporator temperature by controlling the refrigeration circuit, thereby controlling the actual air outlet temperature; The calculation module is further used to obtain the temperature difference between the actual temperature of the air outlet and the target temperature of the air outlet; The control module is also used to control the temperature of the air outlet through the heat source of the heating circuit and adjusting the opening of the temperature damper when the temperature difference is greater than a preset temperature threshold.

9. A thermal management control device for an electric vehicle, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the electric vehicle thermal management control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the electric vehicle thermal management control method according to any one of claims 1 to 7 are implemented.

Images