Electric vehicle heating control method and device

Abstract

The present application provides an electric vehicle heating control method and device, which includes: determining whether the electric vehicle's power battery currently has a heating demand; if so, determining whether the power battery is in a charging state; if the power battery is in a charging state, determining the target position of a three-way proportional valve in a thermal management circuit, and adjusting the three-way proportional valve according to the target position; if the power battery is in a non-charging state, obtaining the passenger compartment heating priority of the electric vehicle's passenger compartment, determining the target position of the three-way proportional valve according to the passenger compartment heating priority, and adjusting the three-way proportional valve according to the target position. It can be seen that this method can automatically adjust the three-way proportional valve in the thermal management circuit, thereby achieving thermal balance between the power battery and the electric vehicle's passenger compartment, thereby helping to improve the vehicle user experience.

Description

Technical Field

[0001] The present application relates to the field of thermal management technology, and more specifically, to a heating control method and device for an electric vehicle. Background Art

[0002] With the increasing popularity of electric vehicles, their performance in low temperatures is attracting increasing attention. Existing technologies typically require heating the passenger compartment in low-temperature environments. However, due to poor battery performance at low temperatures, external heating is required. However, in practice, it has been found that heating the passenger compartment and the battery cannot be effectively balanced, which reduces the driving experience. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide an electric vehicle heating control method and device, which can automatically adjust the three-way proportional valve in the thermal management circuit, thereby achieving thermal balance between the power battery and the electric vehicle passenger compartment, thereby helping to improve the vehicle user experience.

[0004] A first aspect of an embodiment of the present application provides a heating control method for an electric vehicle, comprising:

[0005] Determine whether the electric vehicle's power battery currently needs to be heated;

[0006] If there is a heating demand, determining whether the power battery is in a charging state;

[0007] If the power battery is in a charging state, determining a target position of a three-way proportional valve in a thermal management circuit and adjusting the three-way proportional valve according to the target position; wherein the thermal management circuit is provided on the electric vehicle and is used to regulate thermal interaction between the power battery and the passenger compartment of the electric vehicle through the three-way proportional valve;

[0008] If the power battery is in a non-charging state, a passenger compartment heating priority of the electric vehicle passenger compartment is obtained, and a target position of the three-way proportional valve is determined according to the passenger compartment heating priority, and the three-way proportional valve is adjusted according to the target position.

[0009] In the above implementation process, the method can prioritize determining whether the electric vehicle's power battery currently requires heating; and if so, determine whether the power battery is in a charging state; then, if the power battery is in a charging state, determine the target position of the three-way proportional valve in the thermal management circuit and adjust the three-way proportional valve based on the target position; wherein the thermal management circuit is provided on the electric vehicle and is used to regulate the thermal interaction between the power battery and the electric vehicle's passenger compartment through the three-way proportional valve; furthermore, if the power battery is in a non-charging state, obtain the passenger compartment heating priority of the electric vehicle's passenger compartment, determine the target position of the three-way proportional valve based on the passenger compartment heating priority, and adjust the three-way proportional valve based on the target position. It can be seen that implementing this embodiment can automatically adjust the three-way proportional valve in the thermal management circuit, thereby achieving thermal balance between the power battery and the electric vehicle's passenger compartment, thereby improving the vehicle user experience.

[0010] Furthermore, determining the target position of the three-way proportional valve in the thermal management circuit includes:

[0011] Obtaining the current battery heating priority of the power battery;

[0012] A target position of a three-way proportional valve in a thermal management circuit is determined as a preset first position according to the battery heating priority.

[0013] Furthermore, determining the target position of the three-way proportional valve according to the passenger compartment heating priority includes:

[0014] When the passenger compartment heating priority is the preset second level, determining the target position of the three-way proportional valve to be the preset second position;

[0015] When the passenger compartment heating priority is the preset third level, the target position of the three-way proportional valve is determined to be the preset third position;

[0016] When the passenger compartment heating priority is the preset zeroth level, the target position of the three-way proportional valve is determined to be the preset fourth position.

[0017] Furthermore, the method further comprises:

[0018] When the passenger compartment heating priority is a preset first level, a proportional valve opening adjustment scheme is determined according to preset conditions, and the three-way proportional valve is adjusted according to the proportional valve opening adjustment scheme.

[0019] Furthermore, the determining of the proportional valve opening adjustment scheme according to the preset conditions includes:

[0020] Obtain the air conditioning heating water temperature, battery heating water temperature and actual power consumption of the water heater;

[0021] Determining whether the air conditioning heating water temperature, the battery heating water temperature, and the actual power consumption of the water heater meet preset conditions;

[0022] If yes, determining the proportional valve opening adjustment scheme is to gradually increase the opening of the three-way proportional valve according to a preset increase algorithm;

[0023] If not, the proportional valve opening adjustment scheme is determined to be gradually reducing the opening of the three-way proportional valve according to a preset reduction algorithm.

[0024] A second aspect of an embodiment of the present application provides a heating control device for an electric vehicle, the heating control device for an electric vehicle comprising:

[0025] A first judgment unit is used to judge whether the power battery of the electric vehicle currently needs to be heated;

[0026] a second judging unit, configured to judge whether the power battery is in a charging state when it is determined that there is a heating demand;

[0027] a first position determination unit, configured to determine a target position of a three-way proportional valve in a thermal management circuit when it is determined that the power battery is in a charging state; wherein the thermal management circuit is provided on the electric vehicle and is configured to regulate thermal interaction between the power battery and a passenger compartment of the electric vehicle via the three-way proportional valve;

[0028] an acquiring unit, configured to acquire a passenger compartment heating priority of the electric vehicle passenger compartment when it is determined that the power battery is in a non-charging state;

[0029] a second position determining unit, configured to determine a target position of the three-way proportional valve according to the passenger compartment heating priority;

[0030] An adjusting unit is used to adjust the three-way proportional valve according to the target position.

[0031] Furthermore, the first position determining unit includes:

[0032] an acquiring subunit, configured to acquire a current battery heating priority of the power battery when it is determined that the power battery is in a charging state;

[0033] The first determining subunit is configured to determine a target position of a three-way proportional valve in a thermal management circuit as a preset first position according to the battery heating priority.

[0034] Furthermore, the second position determination unit is specifically used to determine the target position of the three-way proportional valve as the preset second position when the passenger compartment heating priority is the preset second level; to determine the target position of the three-way proportional valve as the preset third position when the passenger compartment heating priority is the preset third level; and to determine the target position of the three-way proportional valve as the preset fourth position when the passenger compartment heating priority is the preset zeroth level.

[0035] A third aspect of an embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute any one of the electric vehicle heating control methods described in the first aspect of the embodiment of the present application.

[0036] A fourth aspect of an embodiment of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the electric vehicle heating control method described in any one of the first aspects of the embodiment of the present application is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 A flow chart of a heating control method for an electric vehicle provided in an embodiment of the present application;

[0039] Figure 2 A schematic structural diagram of a heating control device for an electric vehicle provided in an embodiment of the present application;

[0040] Figure 3 This is a diagram illustrating an operation example of an electric vehicle heating control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0042] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0043] Example 1

[0044] Please see Figure 1 , Figure 1 The present invention provides a flow chart of a method for controlling heating of an electric vehicle. The method includes:

[0045] S101. Determine whether the power battery of the electric vehicle currently needs to be heated. If so, execute step S102; if not, end this process.

[0046] In this embodiment, the battery heating priority is represented by Batt_HeatPrioReq. When there is no battery heating requirement, the battery heating priority is 0. Furthermore, when there is a battery heating requirement, the battery heating priority is 1 when the vehicle is not charging, and 2 when the vehicle is charging.

[0047] S102 , determining whether the power battery is in a charging state, if so, executing steps S103 to S104 ; if not, executing step S105 .

[0048] S103: Obtain the current battery heating priority of the power battery.

[0049] In this embodiment, the passenger compartment heating priority is represented by HVAC_HeatPrioReq.

[0050] Among them, this method defines a total of 4 priorities, and the calculation formula of △T_ptc is as follows:

[0051] △T_ptc=T_ptc_target-T_ptc_act

[0052] ① If there is no heating demand, the heating priority is 0;

[0053] ② If there is heating demand and △T_ptc>-1℃ and it is not in the front defrost state, the heating priority is "1";

[0054] ③ If there is heating demand and △T_ptc>5℃ and the system is not in the front defrost state, the heating priority is "2";

[0055] ④ When there is heating demand and the system is in the pre-defrost state, the heating priority is "3".

[0056] S104 , determining the target position of the three-way proportional valve in the thermal management circuit as a preset first position according to the battery heating priority, and executing step S110 .

[0057] In this embodiment, a thermal management circuit is provided on the electric vehicle and is used to regulate the thermal interaction between the power battery and the passenger compartment of the electric vehicle through a three-way proportional valve.

[0058] In this embodiment, the preset first position corresponds to Control_valve_target=H (all the coolant on the battery side flows through the heat exchanger without passing through the chiller).

[0059] S105 , obtaining a passenger compartment heating priority of the electric vehicle passenger compartment, and executing steps S106 , S107 , S108 or S109 according to the passenger compartment heating priority.

[0060] S106. When the passenger compartment heating priority is the preset first level, a proportional valve opening adjustment plan is determined according to preset conditions, and the three-way proportional valve is adjusted according to the proportional valve opening adjustment plan.

[0061] As an optional implementation, determining a proportional valve opening adjustment scheme according to preset conditions includes:

[0062] Obtain the air conditioning heating water temperature, battery heating water temperature and actual power consumption of the water heater;

[0063] Determine whether the air conditioning heating water temperature, battery heating water temperature and actual power consumption of the water heater meet the preset conditions;

[0064] If yes, determine the proportional valve opening adjustment plan as gradually increasing the opening of the three-way proportional valve according to a preset increase algorithm;

[0065] If not, the proportional valve opening adjustment scheme is determined to be gradually reducing the opening of the three-way proportional valve according to a preset reduction algorithm.

[0066] S107: When the passenger compartment heating priority is the preset second level, the target position of the three-way proportional valve is determined to be the preset second position.

[0067] In this embodiment, the preset second position corresponds to Control_valve_target=H2 (13% of the battery side coolant flows through the heat exchanger, and the rest flows through the chiller).

[0068] S108. When the passenger compartment heating priority is the preset third level, the target position of the three-way proportional valve is determined to be the preset third position.

[0069] In this embodiment, the preset third position corresponds to Control_valve_target=H3 (all the coolant on the battery side flows through the chiller side without passing through the heat exchanger).

[0070] S109: When the passenger compartment heating priority is the preset zeroth level, the target position of the three-way proportional valve is determined to be the preset fourth position.

[0071] In this embodiment, the preset fourth position corresponds to when the passenger compartment heating priority is "0", the three-way proportional valve target position Control_valve_target=97%, and the battery coolant all flows through the heat exchanger side.

[0072] S110. Adjust the three-way proportional valve according to the proportional valve opening adjustment plan or the target position.

[0073] In this embodiment, the control of the circuit under different working conditions is as follows:

[0074] ① When the battery heating priority is equal to "2", the vehicle is in the charging state, and the target position of the three-way proportional valve is:

[0075] Control_valve_target = H (all coolant on the battery side flows through the heat exchanger, not the chiller);

[0076] ② When the battery heating priority is equal to "1", the vehicle is not charging and the passenger compartment heating priority needs to be considered;

[0077] a) If the passenger compartment heating priority is "3", the three-way proportional valve target position Control_valve_target = H3 (all the battery side coolant flows through the chiller side, not through the heat exchanger);

[0078] b) If the passenger compartment heating priority is "2" at this time, the three-way proportional valve target position Control_valve_target = H2 (13% of the battery side coolant flows through the heat exchanger, and the rest flows through the chiller);

[0079] c) If the passenger compartment heating priority is "1" at this time, the air conditioning heating water temperature (target and actual) T_ptc, the battery heating water temperature (target and actual) T_batt_in and the actual PTC power consumption P_ptc_power are determined;

[0080] When the following two conditions are met at the same time, the three-way proportional valve opening Control_valve_current++ begins to gradually increase;

[0081] ① There is enough power for air conditioning and heating (PTC actual power consumption P_ptc_power<6KW);

[0082] ② The battery heating water temperature cannot meet the demand (△T_batt_in=T_batt_in_target-T_batt_in_act;△T_batt_in>5℃)

[0083] Otherwise, gradually reduce the opening of the three-way proportional valve;

[0084] If there is no excess air conditioning heating or the battery heating water temperature can meet the demand, the three-way proportional valve target position Control_valve_target = H1;

[0085] d) If the passenger compartment heating priority is "0" at this time, the three-way proportional valve target position Control_valve_target = 97%, and all the battery coolant flows through the heat exchanger side.

[0086] The following table shows the relationship between parameters and target values:

[0087] parameter Target value H 100％ H1 20％ H2 13％ H3 0％

[0088] See also Figure 3 , Figure 3 The following diagram shows an example of the operation of the electric vehicle heating control method.

[0089] Batt_HeatPrioReq: battery heating priority;

[0090] HVAC_HeatPrioReq: passenger compartment heating priority;

[0091] T_batt_in_act: actual value of battery water inlet temperature;

[0092] T_batt_in_target: target value of battery water inlet temperature;

[0093] Control_valve_current: current position of the valve;

[0094] Control_valve_target: proportional valve target position;

[0095] P_ptc_power: actual power consumed by PTC;

[0096] T_ptc_act: actual water temperature of PTC outlet water;

[0097] T_ptc_target: PTC outlet water target temperature.

[0098] In this embodiment, the device applying this method should have the following components:

[0099] ①Battery water pump: used to drive the battery circuit coolant circulation, cooling and heating the high-voltage battery.

[0100] ②Battery cooler Chiller: A heat exchanger that, when coupled to the air conditioning system, exchanges heat between the refrigerant and the coolant to cool the battery.

[0101] ③ Three-way proportional valve: proportionally adjusts the coolant flow through the chiller and battery heating circuits.

[0102] ④ Liquid-to-liquid heat exchanger: In low-temperature environments, the battery circuit coolant is heated by the water temperature of the air conditioning heater circuit, thereby heating the high-voltage battery.

[0103] ⑤Battery circuit water pipe: connects the various components of the battery circuit, cools and heats the high-voltage battery.

[0104] ⑥ Warm air circuit water pipe: connects the various components of the warm air circuit to heat the passenger compartment.

[0105] ⑦Temperature sensor: water temperature monitoring circuit water temperature.

[0106] In this embodiment, the application conditions of this method are as follows:

[0107] ① When the vehicle is charged with high voltage (including DC and AC charging);

[0108] ②When the vehicle is driving (not charging).

[0109] In this embodiment, the overall idea of ​​the method is: the water PTC in the thermal management circuit provides passenger compartment heating and battery heating functions, and thermal interaction between the battery side and the passenger compartment water circuit is realized through a heat-to-heat heat exchanger. The battery side realizes the heat load on the battery side by adjusting the proportional three-way valve, thereby achieving a balance between battery heating and passenger compartment heating under different working conditions.

[0110] In this embodiment, the execution subject of the method may be a computing device such as a computer or a server, and this is not limited in this embodiment.

[0111] In this embodiment, the execution subject of the method may also be a smart device such as a smart phone, a tablet computer, etc., which is not limited in this embodiment.

[0112] It can be seen that the electric vehicle heating control method described in this embodiment can achieve a balance in heating the passenger compartment side and the battery side by adjusting the three-way proportional valve in the circuit, so that each operating condition can meet the user's needs and optimize the car-using experience.

[0113] Example 2

[0114] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of an electric vehicle heating control device provided in an embodiment of the present application. Figure 2 As shown, the electric vehicle heating control device includes:

[0115] The first judgment unit 210 is used to judge whether the power battery of the electric vehicle currently needs to be heated;

[0116] The second judgment unit 220 is used to judge whether the power battery is in a charging state when it is determined that there is a heating demand;

[0117] a first position determination unit 230 for determining a target position of a three-way proportional valve in a thermal management circuit when it is determined that the power battery is in a charging state; wherein the thermal management circuit is provided in the electric vehicle and is used to regulate thermal interaction between the power battery and the passenger compartment of the electric vehicle through the three-way proportional valve;

[0118] an acquiring unit 240 for acquiring a passenger cabin heating priority of the electric vehicle passenger cabin when it is determined that the power battery is in a non-charging state;

[0119] a second position determination unit 250 for determining a target position of the three-way proportional valve according to a passenger compartment heating priority;

[0120] The adjustment unit 260 is used to adjust the three-way proportional valve according to the target position.

[0121] As an optional implementation manner, the first position determining unit 230 includes:

[0122] An acquisition subunit 231 is configured to acquire the current battery heating priority of the power battery when it is determined that the power battery is in a charging state;

[0123] The first determining subunit 232 is configured to determine a target position of the three-way proportional valve in the thermal management circuit as a preset first position according to the battery heating priority.

[0124] As an optional embodiment, the second position determination unit 250 is specifically used to determine the target position of the three-way proportional valve as the preset second position when the passenger compartment heating priority is the preset second level; to determine the target position of the three-way proportional valve as the preset third position when the passenger compartment heating priority is the preset third level; and to determine the target position of the three-way proportional valve as the preset fourth position when the passenger compartment heating priority is the preset zeroth level.

[0125] As an optional implementation, the electric vehicle heating control device further includes:

[0126] The adjustment unit 260 is further configured to determine a proportional valve opening adjustment scheme according to preset conditions when the passenger compartment heating priority is a preset first level, and adjust the three-way proportional valve according to the proportional valve opening adjustment scheme.

[0127] As an optional implementation, the adjustment unit 260 includes:

[0128] The detection subunit 261 is used to obtain the air conditioning heating water temperature, the battery heating water temperature and the actual power consumption of the water heater;

[0129] The judging subunit 262 is used to judge whether the air-conditioning heating water temperature, the battery heating water temperature and the actual power consumption of the water heater meet the preset conditions;

[0130] The second determining subunit 263 is configured to determine, when the air conditioning heating water temperature, the battery heating water temperature, and the actual power consumption of the water heater meet preset conditions, a proportional valve opening adjustment scheme to gradually increase the opening of the three-way proportional valve according to a preset increasing algorithm;

[0131] The second determining subunit 263 is further used to determine the proportional valve opening adjustment scheme to gradually reduce the opening of the three-way proportional valve according to a preset reduction algorithm when the air conditioning heating water temperature, the battery heating water temperature and the actual power consumption of the water heater do not meet the preset conditions.

[0132] In this embodiment, the explanation of the electric vehicle heating control device can refer to the description in Example 1, and will not be further elaborated in this embodiment.

[0133] It can be seen that the electric vehicle heating control device described in this embodiment can achieve a balance in heating the passenger compartment side and the battery side by adjusting the three-way proportional valve in the circuit, so that each working condition can meet the user's needs and optimize the car-using experience.

[0134] An embodiment of the present application provides an electronic device, including a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the electric vehicle heating control method in embodiment 1 of the present application.

[0135] An embodiment of the present application provides a computer-readable storage medium storing computer program instructions. When the computer program instructions are read and executed by a processor, the electric vehicle heating control method in embodiment 1 of the present application is executed.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes 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 box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0137] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0138] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0139] The foregoing is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures.

[0140] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0141] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

Claims

1. A heating control method for an electric vehicle, characterized in that: include: Determine whether the electric vehicle's power battery currently needs to be heated; If there is a heating demand, determining whether the power battery is in a charging state; If the power battery is in a charging state, obtaining a current battery heating priority of the power battery; Determining a target position of a three-way proportional valve in a thermal management circuit as a preset first position according to the battery heating priority, and adjusting the three-way proportional valve according to the target position; wherein the thermal management circuit is provided on the electric vehicle and is used to regulate thermal interaction between the power battery and the passenger compartment of the electric vehicle through the three-way proportional valve; wherein the preset first position corresponds to the battery-side coolant flowing entirely through the heat exchanger and not through the battery cooler; If the power battery is in a non-charging state, obtaining a passenger compartment heating priority of the electric vehicle passenger compartment, determining a target position of the three-way proportional valve according to the passenger compartment heating priority, and adjusting the three-way proportional valve according to the target position; The step of obtaining the passenger compartment heating priority of the electric vehicle passenger compartment includes: If there is no heating demand, the passenger compartment heating priority is determined to be the preset zero level; If there is a heating demand and the PTC temperature deviation is greater than a first preset threshold and the system is in a non-front defrost state, determining that the passenger compartment heating priority is a preset first level; If there is a heating demand and the PTC temperature deviation is greater than a second preset threshold and the system is in the non-front defrost state, determining the passenger compartment heating priority to be the preset second level; If there is a heating demand and the system is in the front defrost state, determining the passenger compartment heating priority to be the preset third level; The calculation formula of the PTC temperature deviation ΔT_ptc is as follows: △T_ptc = T_ptc_target - T_ptc_act; Among them, T_ptc_act is the actual water temperature of the PTC outlet water, and T_ptc_target is the target water temperature of the PTC outlet water; The first preset threshold is -1°C, and the second preset threshold is 5°C.

2. The electric vehicle heating control method according to claim 1, characterized in that: Determining the target position of the three-way proportional valve according to the passenger compartment heating priority includes: When the passenger compartment heating priority is the preset second level, determining the target position of the three-way proportional valve to be the preset second position; When the passenger compartment heating priority is the preset third level, the target position of the three-way proportional valve is determined to be the preset third position; When the passenger compartment heating priority is the preset zeroth level, the target position of the three-way proportional valve is determined to be the preset fourth position.

3. The electric vehicle heating control method according to claim 2, characterized in that: The method further comprises: When the passenger compartment heating priority is a preset first level, a proportional valve opening adjustment scheme is determined according to preset conditions, and the three-way proportional valve is adjusted according to the proportional valve opening adjustment scheme.

4. The electric vehicle heating control method according to claim 3, characterized in that: The method of determining the proportional valve opening adjustment scheme according to the preset conditions includes: Obtain the air conditioning heating water temperature, battery heating water temperature and actual power consumption of the water heater; Determining whether the air conditioning heating water temperature, the battery heating water temperature, and the actual power consumption of the water heater meet preset conditions; If yes, determining the proportional valve opening adjustment scheme is to gradually increase the opening of the three-way proportional valve according to a preset increase algorithm; If not, the proportional valve opening adjustment scheme is determined to be gradually reducing the opening of the three-way proportional valve according to a preset reduction algorithm.

5. A heating control device for an electric vehicle, characterized in that: The electric vehicle heating control device comprises: A first judgment unit is used to judge whether the power battery of the electric vehicle currently needs to be heated; a second judging unit, configured to judge whether the power battery is in a charging state when it is determined that there is a heating demand; a first position determination unit, configured to determine a target position of a three-way proportional valve in a thermal management circuit when it is determined that the power battery is in a charging state; wherein the thermal management circuit is provided on the electric vehicle and is configured to regulate thermal interaction between the power battery and a passenger compartment of the electric vehicle via the three-way proportional valve; an acquiring unit, configured to acquire a passenger compartment heating priority of the electric vehicle passenger compartment when it is determined that the power battery is in a non-charging state; a second position determining unit, configured to determine a target position of the three-way proportional valve according to the passenger compartment heating priority; an adjusting unit, configured to adjust the three-way proportional valve according to the target position; The first position determining unit includes: an acquiring subunit, configured to acquire a current battery heating priority of the power battery when it is determined that the power battery is in a charging state; a first determining subunit, configured to determine a target position of a three-way proportional valve in a thermal management circuit as a preset first position according to the battery heating priority; wherein the preset first position corresponds to the battery-side coolant flowing entirely through the heat exchanger without passing through the battery cooler; The obtaining unit is specifically configured to determine that the passenger cabin heating priority is a preset zeroth level if there is no heating demand; If there is a heating demand and the PTC temperature deviation is greater than a first preset threshold and the system is in a non-front defrost state, determining that the passenger compartment heating priority is a preset first level; If there is a heating demand and the PTC temperature deviation is greater than a second preset threshold and the system is in the non-front defrost state, determining the passenger compartment heating priority to be the preset second level; If there is a heating demand and the system is in the front defrost state, determining the passenger compartment heating priority to be the preset third level; The calculation formula of the PTC temperature deviation ΔT_ptc is as follows: △T_ptc = T_ptc_target - T_ptc_act; Among them, T_ptc_act is the actual water temperature of the PTC outlet water, and T_ptc_target is the target water temperature of the PTC outlet water; The first preset threshold is -1°C, and the second preset threshold is 5°C.

6. The electric vehicle heating control device according to claim 5, characterized in that: The second position determination unit is specifically used to determine the target position of the three-way proportional valve as the preset second position when the passenger compartment heating priority is the preset second level; to determine the target position of the three-way proportional valve as the preset third position when the passenger compartment heating priority is the preset third level; and to determine the target position of the three-way proportional valve as the preset fourth position when the passenger compartment heating priority is the preset zeroth level.

7. An electronic device, characterized in that: The electronic device includes a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to execute the electric vehicle heating control method according to any one of claims 1 to 4.

8. A readable storage medium, characterized in that: The readable storage medium stores computer program instructions, and when the computer program instructions are read and executed by a processor, the electric vehicle heating control method according to any one of claims 1 to 4 is executed.

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