Vehicle heating control method, device, equipment, medium and program product

Abstract

The application provides a vehicle heating control method, device, equipment, medium and program product. When it is detected that the passenger cabin and the battery of a target vehicle have a heating demand at the same time, the passenger cabin heating mode is started. The passenger cabin heating mode is used for heating and processing air in the passenger cabin by using a heat exchanger in a heat pump system and / or a cooling liquid circulation system in an air conditioning box. Then, whether the air temperature of an air outlet or the running time of the passenger cabin heating mode meets a first preset requirement is monitored in real time. If yes, the shunt mode is started, and a preset control instruction is sent to a target device. The preset control instruction is used for heating the cooling liquid in the warm air circuit by using the heat pump system, and the cooling liquid is shunted to the battery circuit, so that the cooling liquid heats the battery. The technical problem of how to allocate and control the heating capacity of a new energy vehicle is solved. The technical effect of heating the battery by using the heat pump system is achieved, heating efficiency is improved, and energy is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, and more particularly to a vehicle heating control method, device, equipment, medium and program product. BACKGROUND

[0002] With the development of vehicle technology, new energy vehicles have become the main trend of future vehicle development. Although there are many solutions in the field of traditional vehicles for in-vehicle environment control, new challenges are faced in new energy vehicles because high-power drive motors and large-capacity batteries are introduced in new energy vehicles, which will bring new influences on existing vehicle thermal management.

[0003] In low-temperature weather, the battery needs to be heated because its working performance is affected when the battery temperature is low. However, if the passenger compartment also has a heating demand, because the heating capacity of the vehicle is limited, how to achieve heating distribution and control becomes a technical problem to be solved for new energy vehicles.

[0004] Therefore, how to distribute and control the heating capacity of a new energy vehicle is a technical problem to be solved by the present application. SUMMARY

[0005] The purpose of the present application is to provide a vehicle heating control method, device, equipment, medium and program product, which heats the passenger compartment through a heat pump system first, and then uses the heat pump system to heat the coolant through the warm air core after the air temperature at the air outlet reaches the target temperature, and then introduces the heated coolant into the battery circuit to perform heat transfer to the battery, so that the battery temperature is increased, thereby solving the technical problem of how to distribute and control the heating capacity of a new energy vehicle.

[0006] In a first aspect, the present application discloses a vehicle heating control method, comprising:

[0007] When it is detected that the passenger compartment and the battery of a target vehicle have a heating demand at the same time, a passenger compartment heating mode is started, and the passenger compartment heating mode is used to heat and treat the air in the passenger compartment by using a heat pump system and / or a heat exchanger in a coolant circulation system in an air conditioner box;

[0008] The air temperature at the air outlet or the running time of the passenger compartment heating mode is monitored in real time to determine whether it meets a first preset requirement;

[0009] If yes, a shunt mode is started, and a preset control instruction is sent to a target device, the preset control instruction is used to heat the coolant in the warm air circuit by using the heat pump system, and the coolant is shunted to the battery circuit, so that the coolant heats the battery, and the coolant circulation system includes the warm air circuit and the battery circuit.

[0010] Based on the above technical content, when the passenger cabin and the battery have a heating demand at the same time, the passenger cabin is heated first, and when the outlet temperature meets the preset requirement or the time for heating the passenger cabin reaches the preset time, the simultaneous heating of the passenger cabin and the battery is started, and heat is transferred to the heating air circuit through the heat pump system, which is more efficient and more energy-saving than directly heating the coolant through the heater in the heating air circuit. The heating capacity of the heat pump system is fully utilized to heat the battery efficiently and save energy while ensuring the comfort of the passenger cabin.

[0011] In an implementation manner, the shunt mode is started, and a preset control instruction is sent to the target device, including:

[0012] A first closed-loop control instruction is sent to the compressor in the heat pump system;

[0013] A first rotating speed control instruction is sent to the water pump in the heating air circuit, so that the rotating speed of the water pump is increased from the first rotating speed to the second rotating speed in a first preset manner;

[0014] A shunt instruction is sent to the first multi-way valve, the shunt instruction being used to make the second output end of the first multi-way valve switch from the closed state to the open state in a second preset manner, so as to guide the coolant in the heating air circuit into the battery circuit and heat the battery through the coolant, the input end and the first output end of the first multi-way valve being connected with the heating air circuit, and the second output end being connected with the battery circuit.

[0015] The compressor is still used to perform closed-loop control on the air temperature of the outlet, and the first multi-way valve and the water pump cooperate with each other, after the heat pump system heats the air in the air conditioning box, the air heats the coolant in the heating air core when flowing through the heating air core, and the heated coolant is slowly guided into the battery circuit under the cooperation of the first multi-way valve and the water pump, so as to heat the battery through the battery circuit. Ultimately, the battery is heated through the heat pump system instead of the heater in the coolant circulation system, because the heating efficiency of the heat pump system is higher and more energy-saving.

[0016] In an implementation manner, the shunt mode is started, and a preset control instruction is sent to the target device, further including:

[0017] The total heating load of the passenger cabin and the battery is obtained;

[0018] It is judged whether the total heating load exceeds the heating upper limit of the heat pump system;

[0019] If yes, the heater of the coolant circulation system is started to perform heat compensation.

[0020] Since the heating capacity of the heat pump system is limited, when the heating capacity of the heat pump system is insufficient to meet the heating demand of the passenger cabin and the battery together, the heater needs to be turned on to heat the coolant to make up for the insufficient heating power of the heat pump system, so as to ensure that the passenger cabin and the battery can maintain in the appropriate working range.

[0021] In an implementation manner, before the heater of the coolant circulation system is turned on for heat compensation, the method further includes:

[0022] monitoring whether the air temperature of the air outlet meets a second preset requirement in real time;

[0023] If yes, the heater is turned on.

[0024] a second closed-loop control instruction is sent to the heater;

[0025] a first control instruction is sent to the compressor to enable the compressor to operate at a preset rotating speed;

[0026] If no, the heater is turned off.

[0027] In order to avoid the air temperature fluctuation of the air outlet leading to frequent turning on and off of the heater, causing the heater failure or leading to the attenuation of the service life of the heater, an error range, i.e., the second preset requirement, is provided for the air temperature of the air outlet, so that the problem of frequent turning on and off of the heater caused by sensor temperature drift or air outlet temperature fluctuation can be avoided.

[0028] In an implementation manner, the passenger cabin heating mode is turned on, including:

[0029] obtaining a first heating load of the passenger cabin;

[0030] If the first heating load is less than or equal to a load threshold, it is determined to turn on a single heat pump mode, and the single heat pump mode is used to control the heat pump system to heat the air of the passenger cabin alone.

[0031] a second control instruction is sent to the compressor to enable the heating capacity of the compressor to reach a maximum value;

[0032] monitoring the air temperature of the air outlet in real time;

[0033] When the temperature difference between the air temperature and the target temperature is less than or equal to a first preset threshold, a third closed-loop control instruction is sent to the compressor to enable the compressor to enter a closed-loop control state.

[0034] The first heating load less than or equal to the load threshold value proves that the heat pump system is sufficient to provide sufficient heating capacity to meet the heating demand of the passenger cabin, so that the compressor quickly raises the temperature of the passenger cabin at the maximum heating capacity to improve the user experience. After the air temperature at the air outlet reaches the preset target temperature, the compressor enters the closed loop control to reduce the temperature fluctuation of the air outlet and achieve the technical effect of energy saving.

[0035] In an implementation manner, the method further includes:

[0036] If the first heating load is greater than the load threshold value, it is determined to start the composite mode, and the composite mode is used to heat the air of the passenger cabin by simultaneously using at least one heat pump system and at least one cooling liquid circulation system;

[0037] The second control instruction is sent to the compressor;

[0038] The cooling liquid temperature at the outlet of the heater core is monitored in real time;

[0039] When the cooling liquid temperature reaches the target temperature, the fourth closed loop control instruction is sent to the heater to make the heater enter the closed loop control state.

[0040] When the heat pump and the heater work simultaneously, that is, in the composite mode, the compressor operates at the upper limit speed of this working condition, and the heater works at the maximum power in the initial stage to quickly raise the temperature of the passenger cabin to improve the user experience. When the water temperature at the outlet of the heater core reaches the target temperature, the control strategy of the heater changes to the closed loop control strategy to reduce the temperature fluctuation of the air outlet and achieve the technical effect of energy saving.

[0041] In an implementation manner, the cooling liquid circulation system further includes a motor loop, and after starting the passenger cabin heating mode, the method further includes:

[0042] The first temperature of the cooling liquid in the motor loop and the second temperature of the battery are obtained;

[0043] When the temperature difference between the first temperature and the second temperature is greater than or equal to a second preset threshold value, a connection instruction is sent to the second multi-way valve to connect the motor loop and the battery loop, and the heat generated by the operation of the motor is transmitted to the battery through the cooling liquid.

[0044] After the vehicle is driven, the operation of the motor generates heat, in order to fully utilize the heat, the battery can be heated by using the heat before the heater is started, so as to achieve the effect of further energy saving.

[0045] In a second aspect, the application discloses a vehicle heating control device, which comprises:

[0046] The processing module is used for:

[0047] When it is detected that the passenger cabin and the battery of the target vehicle have a heating demand at the same time, the passenger cabin heating mode is started, and the passenger cabin heating mode is used for heating air in the passenger cabin in the air conditioning box by using a heat exchanger in the heat pump system and / or the cooling liquid circulation system;

[0048] The monitoring module is configured to monitor whether the air temperature of the air outlet and the running time of the passenger cabin heating mode satisfy a first preset requirement in real time.

[0049] When the air temperature or the running time satisfies the first preset requirement, the processing module is further configured to start the shunt mode, and send a preset control instruction to the target device, the preset control instruction being used for heating the cooling liquid in the warm air circuit by using the heat pump system, and shunting the cooling liquid to the battery circuit, so that the cooling liquid heats the battery, and the cooling liquid circulation system comprises the warm air circuit and the battery circuit.

[0050] In a third aspect, the present application discloses an electronic device comprising: a processor, and a memory connected with the processor in communication;

[0051] The memory stores computer execution instructions.

[0052] The processor executes the computer execution instructions stored in the memory to realize any one of the possible methods in the first aspect.

[0053] In a fourth aspect, the present application discloses a computer readable storage medium, the computer readable storage medium stores computer execution instructions, and the computer execution instructions are used to realize any one of the possible methods in the first aspect when executed by a processor.

[0054] In a fifth aspect, the present application discloses a computer program product comprising a computer program, the computer program is executed by a processor to realize any one of the possible methods in the first aspect.

[0055] In a sixth aspect, the present application discloses a computer program comprising program codes, and the program codes execute any one of the possible methods in the first aspect when a computer runs the computer program.

[0056] With the above technical solution, the application provides a vehicle heating control method, device, equipment, medium and program product. When it is detected that the passenger compartment and the battery of a target vehicle have a heating demand at the same time, the passenger compartment heating mode is started. The passenger compartment heating mode is used to heat the air in the passenger compartment by using the heat exchanger in the heat pump system and / or the cooling liquid circulation system in the air conditioning box. Then, it is monitored in real time whether the air temperature of the air outlet or the running time of the passenger compartment heating mode meets the first preset requirement. If yes, the shunt mode is started, and a preset control instruction is sent to the target device. The preset control instruction is used to heat the cooling liquid in the warm air circuit by using the heat pump system, and the cooling liquid is shunted to the battery circuit, so that the cooling liquid heats the battery. The technical problem of how to allocate and control the heating capacity of a new energy vehicle is solved. The technical effect of heating the battery by using the heat pump system is achieved, which improves the heating efficiency and saves energy. BRIEF DESCRIPTION OF DRAWINGS

[0057] Figure 1 A structural schematic diagram of a vehicle-mounted heat pump system and a cooling liquid circulation system is provided for the application.

[0058] Figure 2 A flowchart of a vehicle heating control method is provided for the embodiment of the application.

[0059] Figure 3 A flowchart of another vehicle heating control method is provided for the embodiment of the application.

[0060] Figure 4 Another structural schematic diagram of a vehicle-mounted heat pump system and a cooling liquid circulation system is provided for the application.

[0061] Figure 5 A flowchart of another vehicle heating control method is provided for the embodiment of the application.

[0062] Figure 6 A structural schematic diagram of a vehicle heating control device is provided for the embodiment of the application.

[0063] Figure 7 A structural schematic diagram of an electronic device is provided for the embodiment of the application. DETAILED DESCRIPTION

[0064] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work, including but not limited to the combination of the embodiments, belong to the scope of protection of the present application.

[0065] The terms "first", "second", "third", "fourth" and the like in the description, claims, and drawings of the present application (if any) are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0066] First, the terms related to the present application are explained:

[0067] PTC (Positive Temperature Coefficient, positive temperature coefficient) heater: composed of PTC ceramic heating element and aluminum pipe. This type of PTC heating element has the advantages of small thermal resistance and high heat exchange efficiency, and is an automatic constant temperature, power-saving electric heater. The outstanding feature is safety performance, which will not cause the surface "red" phenomenon of electric heating tube type heater in any application, thereby causing burns, fire and other safety hazards.

[0068] The inventive concept of the present application is:

[0069] The present inventors have found that in the prior art, when it is necessary to heat and warm the battery, the PTC heater is directly turned on to heat the cooling liquid in the battery circuit, and then the cooling liquid transfers heat to the battery when circulating in the battery circuit. However, if the heating capacity of the heat pump system is not fully utilized at this time, energy will be wasted, because compared with the PTC heater, the heat pump system heats the cooling liquid through the warm air core in the air conditioning box, which has higher heating efficiency and is more energy-saving.

[0070] Therefore, how to make the heating capacity of the heat pump system more fully play, allocate the heating capacity, and add PTC auxiliary heating at the right time, so that the passenger compartment and the battery can be well heated, and the battery can be heated efficiently and energy-savingly on the premise of ensuring the comfort of the passenger compartment.

[0071] The specific application scenario of the present application is:

[0072] Figure 1 A structural schematic diagram of a vehicle-mounted heat pump system and a cooling liquid circulation system is provided for the present application. As shown in Figure 1 The vehicle-mounted heat pump system includes a compressor 101, an evaporator 102, a condenser 103, a blower 104, and an air conditioning box 120, etc. The cooling liquid circulation system includes a heater core 105, a PTC heater 106, a three-way valve 107, a battery 108, a heater circuit pump 109, a battery circuit pump 110, etc.

[0073] The compressor 101 compresses the gaseous refrigerant and inputs it into the condenser 103 to release heat and condense. At this time, the blower 104 blows the air in the passenger compartment to the condenser 103 to heat it, and then blows it back to the passenger compartment from the air outlet to realize passenger compartment heating. The condensed refrigerant enters the evaporator 102 to absorb heat and evaporate, and finally the refrigerant returns to the compressor 101.

[0074] The cooling liquid circulation system includes two circuits:

[0075] The heater circuit is: starting from the heater circuit pump 109, passing through the PTC heater 106, the heater core 105, and then flowing into the first output end B from the input end A of the three-way valve 107 to return to the heater circuit pump 109.

[0076] The battery circuit is: flowing into the second output end C from the input end A of the three-way valve 107, passing through the battery circuit pump 110 and the battery 108, and then returning to the heater circuit pump 109.

[0077] It should be noted that opening the second output end C of the three-way valve 107 can make the cooling liquid heated by the heater core 105 flow into the battery circuit.

[0078] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail in the following specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0079] Figure 2 A flowchart of a vehicle heating control method is provided for the embodiments of the present application. As shown inFigure 2 As shown, the specific steps of this vehicle heating control method include:

[0080] S201. When heating demand is detected simultaneously in the passenger compartment and battery of the target vehicle, the passenger compartment heating mode is activated.

[0081] In this step, the crew cabin heating mode is used to heat the air in the crew cabin using a heat pump system and / or a heat exchanger in the coolant circulation system within the air conditioning unit.

[0082] Specifically, the crew cabin heating modes include at least the following:

[0083] (1) Use a heat pump system to heat the air in the crew cabin separately.

[0084] like Figure 1 As shown, the blower 104 blows the air in the passenger compartment toward the condenser 103 for heating, and then blows it back into the passenger compartment from the air outlet. At this time, the condenser 103 heats the air by condensing the refrigerant input from the compressor.

[0085] (2) The air in the crew compartment is heated separately using the coolant circulation system.

[0086] like Figure 1 As shown, the blower 104 blows the air in the passenger compartment toward the heater core 105 for heating, and then blows it back into the passenger compartment from the air outlet. At this time, the coolant is fed into the PTC heater 106 by the heater circuit pump 109 for heating, and then flows into the heater core 105, where the air is heated.

[0087] (3) The air in the crew cabin is heated by both the heat pump system and the coolant circulation system.

[0088] At the same time, the heat pump system and the coolant circulation system are turned on for heating. That is, the blower 104 blows the air in the crew cabin to the condenser 103 and the heater core 105 for heating, and then blows it back to the crew cabin from the air outlet.

[0089] It should be noted that when both the passenger compartment and the battery of the target vehicle have heating requirements, under ideal circumstances, if the rated heating power of the vehicle heat pump system and the coolant circulation system is large enough, the vehicle heat pump system can heat the passenger compartment independently according to the traditional heating method (i.e., the heating principle of the air conditioning system), and the coolant circulation system can also heat the battery independently according to the traditional method (i.e., heating the coolant to transfer heat to the battery). The heating processes of the two are independent heating processes and do not need to be coupled.

[0090] However, in reality, due to the cost constraints, the rated power of the vehicle-mounted heat pump system and the cooling liquid circulation system is limited, that is, the total heating power of the target vehicle is limited, and cannot meet the total heating power demand when the passenger cabin and the battery exist heating demand at the same time, or the total heating demand power of the target vehicle is greater than the total heating power. That is, the vehicle heating control method provided in the embodiment of the present application is performed when the passenger cabin and the battery exist heating demand at the same time, and the total heating demand power of the target vehicle is greater than the total heating power.

[0091] However, at this time, the total heating power of the vehicle-mounted heat pump system and the cooling liquid circulation system is greater than or equal to the first heating demand power of the passenger cabin or the second heating demand power of the battery, so the vehicle heating control method provided in the embodiment of the present application combines the vehicle-mounted heat pump system and the cooling liquid circulation system, allocates the total heating power to the first heating demand power and the second heating demand power in turn, and preferentially guarantees the heating demand of the passenger cabin, so as to optimize the allocation mode, and solve the contradiction between the heating demand and the total heating supply.

[0092] S202, real-time monitoring whether the air temperature of the air outlet or the running time of the passenger cabin heating mode meets the first preset requirement.

[0093] In this step, the first preset requirement includes that the air temperature of the air outlet reaches the target air outlet temperature, or the running time of the passenger cabin heating mode is greater than or equal to the preset running time Ts.

[0094] Specifically, the temperature sensor installed at the air outlet transmits the real-time temperature signal to the controller or the central processing module, and compares the temperature signal with the preset target air outlet temperature in real time.

[0095] And when the passenger cabin heating mode is started, the timer will be started at the same time, and when the timer is greater than or equal to the preset running time Ts, a feedback signal will be sent to the controller or the central processing module.

[0096] S203, if yes, start the shunt mode, and send a preset control instruction to the target device to heat the battery by using the heat pump system.

[0097] In this step, the preset control instruction is used to heat the cooling liquid in the warm air circuit by using the heat pump system, and the cooling liquid is shunted to the battery circuit, so that the cooling liquid heats the battery,

[0098] In this embodiment, the cooling liquid circulation system includes a warm air circuit and a battery circuit.

[0099] Specifically, a first closed-loop control instruction is sent to the compressor in the heat pump system;

[0100] sending a first rotating speed control instruction to the water pump in the warm air circuit to make the rotating speed of the water pump increase from the first rotating speed to the second rotating speed in a first preset manner;

[0101] sending a shunt instruction to the first multi-way valve, the shunt instruction being used to make the second output end of the first multi-way valve switch from the closed state to the open state in a second preset manner to guide the cooling liquid in the warm air circuit into the battery circuit to heat the battery by the cooling liquid, the input end and the first output end of the first multi-way valve being connected with the warm air circuit, and the second output end being connected with the battery circuit.

[0102] For example, as shown in FIG. 1, the first closed-loop control instruction sent to the compressor 101 includes a closed-loop control instruction based on the combination of the feedforward control and the PID (Proportion Integral Differential) proportional integral differential control, or a closed-loop control instruction based on the combination of the feedforward control and the PI (Proportion Integral) proportional integral control. Figure 1

[0103] It should be noted that the skilled person in the art can select the required closed-loop control model according to the actual situation, and the present application is not limited.

[0104] At the same time, a shunt instruction is sent to the three-way valve 107, i.e., the first multi-way valve, to make the second output end C slowly open at a preset opening rate, and a first rotating speed control instruction is sent to the warm air circuit pump 109 to make the warm air circuit pump 109 slowly increase to the target rotating speed, i.e., the second rotating speed, at a lower first rotating speed in a uniform acceleration or variable acceleration manner.

[0105] It should be noted that the operation of the warm air circuit pump 109 and the three-way valve 107 is mutually coordinated, and the purpose is to control the rate of the cooling liquid flowing into the battery circuit within a preset range to avoid the rate being too fast to make the cooling liquid take away too much heat from the warm air core 105, causing the air temperature at the air outlet of the passenger compartment to fluctuate and reducing the use comfort of the user in the passenger compartment. At the same time, it also avoids the heat quickly flowing to the battery circuit, and the heating capacity of the heat pump system cannot keep up in time, or even far exceeds the maximum heating capacity of the heat pump system in a short time, causing the air temperature at the air outlet to fluctuate sharply, and also making the operating noise of the heat pump system suddenly increase, thereby affecting the use experience of the user.

[0106] It should also be noted that the compressor 101, the warm air circuit pump 109, and the three-way valve 107 are simultaneously and mutually coordinated, and the skilled person in the art can flexibly match the control instructions of the three according to the actual application needs, as long as the shunt rate of the cooling liquid is controlled within a preset range, which belongs to the scope claimed by the present application.

[0107] ​The embodiment of the application provides a vehicle heating control method, which comprises the following steps: when it is detected that a passenger cabin and a battery of a target vehicle simultaneously have a heating demand, starting a passenger cabin heating mode, the passenger cabin heating mode being used for heating air in the passenger cabin by using a heat exchanger in a heat pump system and / or a cooling liquid circulation system in an air conditioning box; then, monitoring whether the air temperature of an air outlet or the running time of the passenger cabin heating mode meets a first preset requirement in real time; if yes, starting a shunt mode, and sending a preset control instruction to a target device, the preset control instruction being used for heating cooling liquid in a warm air circuit by using the heat pump system, and shunting the cooling liquid to a battery circuit, so that the cooling liquid heats the battery. The technical problem of how to allocate and control the heating capacity of a new energy vehicle is solved, the heat pump system is used for heating the battery, heating efficiency is improved, and the technical effect of saving energy is achieved.

[0108] Figure 3 Another flowchart of a vehicle heating control method is provided in the embodiment of the application. As shown in the figure, the specific steps of the vehicle heating control method comprise the following steps. Figure 3

[0109] S301, when it is detected that a passenger cabin and a battery of a target vehicle simultaneously have a heating demand, starting a passenger cabin heating mode.

[0110] This step is similar to S201, and will be specifically introduced in a separate embodiment below, and thus is not described herein again.

[0111] S302, monitoring whether the air temperature of an air outlet or the running time of the passenger cabin heating mode meets a first preset requirement in real time.

[0112] In this step, if yes, S303 is continuously executed, and if no, the monitoring is continuously performed in a loop.

[0113] In this embodiment, the first preset requirement comprises that the air temperature of the air outlet reaches a target air outlet temperature, or the running time of the passenger cabin heating mode is greater than or equal to a preset running time Ts.

[0114] S303, simultaneously sending a first closed-loop control instruction to a compressor in the heat pump system, sending a first rotating speed control instruction to a water pump in a warm air circuit, and sending a shunt instruction to a first multi-way valve.

[0115] ​In this step, the shunt instruction is used to make the second output end of the first multi-way valve switch from the closed state to the open state in a second preset manner, so as to guide the coolant of the warm air circuit into the battery circuit and heat the battery through the coolant, the input end and the first output end of the first multi-way valve are connected with the warm air circuit, and the second output end is connected with the battery circuit. The first speed control instruction is used to make the rotating speed of the water pump increase from the first rotating speed to the second rotating speed in a first preset manner, and the first preset manner includes: uniform acceleration or non-uniform acceleration with an acceleration less than a preset acceleration threshold. The first closed-loop control instruction includes a closed-loop control instruction combining feedforward control and PI control.

[0116] The first closed-loop control instruction, the first speed control instruction, and the first closed-loop control instruction cooperate with each other, so that the coolant is slowly guided from the warm air circuit into the battery circuit in a manner lower than the preset rate.

[0117] S304, obtain the total heating load of the passenger cabin and the battery.

[0118] In this step, the total heating load includes a first heating load of the passenger cabin and a second heating load of the battery.

[0119] In this embodiment, the first heating load of the passenger cabin can be calculated according to the following formula:

[0120] The first heating load = (target air outlet temperature-actual air inlet temperature) * air volume of the blower * actual air specific heat actual air inlet temperature = outside environment temperature * outside circulation percentage + indoor temperature * indoor circulation percentage In this embodiment, the second heating load of the battery can be calculated according to the following formula:

[0121] The second heating load = (target battery temperature-battery circuit coolant temperature) * water pump output flow * coolant specific heat

[0122] It should be noted that for the specific calculation method of the first heating load and the second heating load, those skilled in the art can select other calculation methods according to the actual scene, and the above formula is only one implementation manner.

[0123] S305, judge whether the total heating load exceeds the heating upper limit of the heat pump system.

[0124] In this step, if yes, step S306 is executed. If no, the loop monitoring is continued.

[0125] S306, monitor whether the air temperature of the air outlet meets a second preset requirement in real time.

[0126] In this step, the second preset requirement includes that the temperature difference between the air temperature of the air outlet and the target air outlet temperature is greater than or equal to a preset temperature difference threshold.

[0127] Since the coolant is introduced into the battery circuit, it will take away part of the heat originally used to heat the cabin air to heat the battery, so that the air temperature at the air outlet is lower than the target air outlet temperature. Therefore, it is necessary to detect whether the temperature difference is greater than or equal to the preset temperature difference threshold after the shunt mode is opened. If the second preset requirement is met, it proves that the heating capacity of the heat pump system is insufficient to meet the current total heating demand, and the PTC heater needs to be opened for auxiliary heating.

[0128] If the second preset requirement is met, step S307 is performed;

[0129] Otherwise, when the heater of the coolant circulation system is not turned on, continue to monitor; when the heater is turned on, turn off the heater.

[0130] S307, turn on the heater of the coolant circulation system, send a second closed-loop control instruction to the heater, and send a first control instruction to the compressor of the heat pump system to make the compressor run at a preset speed.

[0131] In this step, the heater includes a PTC heater, which heats the coolant pipeline of the heating circuit to heat the coolant therein.

[0132] In this embodiment, the first control instruction includes running at the highest speed allowed under the current working condition.

[0133] In order to make the air temperature at the cabin air outlet reach the preset air outlet temperature in the shortest possible time, the compressor is turned on to the maximum heating power.

[0134] It should be noted that the preset speed can also be less than the maximum speed, and those skilled in the art can set it according to the actual situation, which is not limited by the present application.

[0135] In this embodiment, the coolant circulation system also includes a motor circuit, and S308 is performed at the same time as S302 is performed.

[0136] S308, obtain the first temperature of the coolant in the motor circuit and the second temperature of the battery.

[0137] In this step, a temperature sensor is installed at the outlet position of the motor cooling pipeline in the motor circuit to detect the first temperature of the coolant. The second temperature is obtained through the bus sent by the battery management system.

[0138] S309, when the temperature difference between the first temperature and the second temperature is greater than or equal to the second preset threshold, send a connection instruction to the second multi-way valve.

[0139] In this step, the connection instruction is used to connect the motor loop and the battery loop, and the heat generated by the motor operation is transmitted to the battery through the cooling liquid to heat and warm up the battery by using the motor loop. Thus, the technical effect of further energy saving is achieved.

[0140] Figure 4 Another structure schematic diagram of the vehicle-mounted heat pump system and the cooling liquid circulation system is provided for the present application. As shown in Figure 4 , on the basis of Figure 1 , the cooling liquid circulation system further comprises a motor loop: a four-way valve 401, a motor 402, a motor loop pump 403, and a cooling water tank 404.

[0141] The four-way valve 401, i.e., the second multi-way valve, receives the connection instruction, and connects the battery loop and the motor loop, so that the cooling liquid in the motor loop can enter the battery loop. Since the motor generates heat when it is running, this part of heat can be transmitted to the battery through the cooling liquid, and thus the energy saving effect is achieved.

[0142] The embodiment of the present application provides a vehicle heating control method, which comprises the following steps: when it is detected that the passenger compartment and the battery of a target vehicle simultaneously have a heating demand, a passenger compartment heating mode is started, the passenger compartment heating mode is used for heating and processing air in the passenger compartment by using a heat exchanger in a heat pump system and / or a cooling liquid circulation system in an air conditioning box; then, whether the air temperature of an air outlet or the running time of the passenger compartment heating mode meets a first preset requirement is monitored in real time; if yes, a shunt mode is started, and a preset control instruction is sent to a target device, the preset control instruction is used for heating cooling liquid in a warm air loop by using the heat pump system, and the cooling liquid is shunted to a battery loop, so that the cooling liquid heats the battery. The technical problem of how to allocate and control the heating capacity of a new energy vehicle is solved, and the technical effect of heating the battery by using the heat pump system is achieved, which improves the heating efficiency and saves energy.

[0143] For steps S201 and S301, in order to facilitate understanding, a possible implementation manner of the passenger compartment heating mode is specifically introduced as follows, which can be used when only the passenger compartment has a heating demand, or can be used when both the passenger compartment and the battery have a heating demand.

[0144] Figure 5 Another flowchart of a vehicle heating control method is provided for the embodiment of the present application. As shown in Figure 5 , the specific steps of the vehicle heating control method comprise the following steps:

[0145] S501, when it is detected that the passenger compartment of a target vehicle has a heating demand, a first heating load of the passenger compartment is acquired.

[0146] In this step, the first heating load = (target air outlet temperature - evaporator outlet air temperature) * air volume passing through the heater core * air specific heat.

[0147] It should be noted that the above calculation method is only one of the embodiments of the first heating load. Those skilled in the art can select other calculation methods according to actual application scenarios, and the present application is not limited thereto.

[0148] S502, if the first heating load is less than or equal to the load threshold, it is determined to start the single heat pump mode.

[0149] In this step, the single heat pump mode is used to control the air in the passenger compartment heated by the heat pump system alone.

[0150] The first heating load less than or equal to the load threshold proves that the heat pump system is sufficient to provide sufficient heating capacity to meet the heating demand of the passenger compartment, so that the compressor quickly raises the temperature of the passenger compartment with the maximum heating capacity to improve the user experience. After the air temperature at the air outlet reaches the preset target temperature, the compressor enters the closed loop control to reduce the temperature fluctuation of the air outlet and achieve the technical effect of energy saving.

[0151] S503, a second control instruction is sent to the compressor to make the heating capacity of the compressor reach the maximum value.

[0152] In this step, the second control instruction includes a control instruction that makes the compressor run at the highest speed in the current working condition.

[0153] S504, the air temperature at the air outlet is monitored in real time.

[0154] In this step, the temperature sensor installed at the air outlet of the passenger compartment detects the air temperature at the air outlet in real time and transmits the temperature signal to the controller or processing module.

[0155] S505, when the temperature difference between the air temperature and the target temperature is less than or equal to the first preset threshold, a third closed loop control instruction is sent to the compressor to make the compressor enter the closed loop control state.

[0156] S506, if the first heating load is greater than the load threshold, it is determined to start the composite mode.

[0157] In this step, the composite mode is used to heat the air by using at least one heat pump system and at least one cooling liquid circulation system at the same time.

[0158] S507, the cooling liquid temperature at the liquid outlet of the heater core is monitored in real time.

[0159] S508, when the cooling liquid temperature reaches the target temperature, a fourth closed loop control instruction is sent to the heater to make the heating device enter the closed loop control state.

[0160] For each of the above steps, specifically, when the passenger compartment has a heating demand, based on the outside environment temperature, the inside temperature, the difference between the evaporator outlet air temperature and the target outlet air temperature, and the air volume passing through the heater core, it is determined whether to select the compressor alone to heat the passenger compartment or to select the compressor and the PTC heater to heat the passenger compartment. When the single heat pump works, i.e., the single heat pump mode, the compressor first runs at the upper limit speed of the working condition, and when the target outlet air temperature-outlet air temperature ≤ first preset threshold T1 (T1 is a calibratable quantity), the feedforward control combined with the closed-loop control strategy of PI or PID is entered. When the heat pump and the PTC heater work simultaneously, i.e., the composite mode, the compressor runs at the upper limit speed of the working condition, and the PTC heater works at the maximum power at the beginning, but when the water temperature at the outlet of the heater core reaches the target outlet air temperature, the control strategy of the PTC changes to the feedforward control combined with the closed-loop control strategy of PI or PID.

[0161] Figure 6 A structural schematic diagram of a vehicle heating control device provided by an embodiment of the present application is shown in FIG. 6. The image processing device 600 can be implemented by software, hardware, or a combination of both.

[0162] As shown in FIG. 6, the image processing device 600 includes: Figure 6

[0163] The processing module 602 is configured to:

[0164] When it is detected that the passenger compartment and the battery of the target vehicle have a heating demand at the same time, the processing module 602 is configured to start the passenger compartment heating mode, and the passenger compartment heating mode is configured to heat the air in the passenger compartment by using the heat exchanger in the heat pump system and / or the cooling liquid circulation system in the air conditioning box.

[0165] The monitoring module 601 is configured to monitor the air temperature of the outlet and the running time of the passenger compartment heating mode in real time.

[0166] When the air temperature or the running time meets the first preset requirement, the processing module 602 is further configured to start the shunt mode, and send a preset control instruction to the target device, and the preset control instruction is configured to heat the cooling liquid in the heater core by using the heat pump system, and shunt the cooling liquid to the battery circuit, so that the cooling liquid heats the battery. The cooling liquid circulation system includes the heater core and the battery circuit.

[0167] In a possible design, the processing module 602 is configured to:

[0168] send a first closed-loop control instruction to the compressor in the heat pump system;

[0169] ​sending a first rotating speed control instruction to the water pump in the warm air circuit, so that the rotating speed of the water pump is increased from the first rotating speed to a second rotating speed in a first preset manner;

[0170] sending a shunt instruction to the first multi-way valve, so that the second output end of the first multi-way valve is switched from a closed state to an open state in a second preset manner, so as to guide the cooling liquid in the warm air circuit into the battery circuit, and heat the battery through the cooling liquid, the input end and the first output end of the first multi-way valve being connected with the warm air circuit, and the second output end being connected with the battery circuit.

[0171] In a possible design, the monitoring module 601 is further configured to acquire a total heating load of the passenger compartment and the battery.

[0172] The processing module 602 is further configured to determine whether the total heating load exceeds a heating upper limit of the heat pump system, and if so, start the heater of the cooling liquid circulation system to perform heat compensation.

[0173] In a possible design, the monitoring module 601 is further configured to monitor whether the air temperature of the air outlet meets a second preset requirement in real time.

[0174] If so, the processing module 602 is further configured to start the heater, send a second closed-loop control instruction to the heater, and send a first control instruction to the compressor, so that the compressor operates at a preset rotating speed.

[0175] If not, the processing module 602 is further configured to stop the heater.

[0176] In a possible design, the monitoring module 601 is configured to acquire a first heating load of the passenger compartment.

[0177] The processing module 602 is configured to:

[0178] If the first heating load is less than or equal to a load threshold, it is determined to start a single-heat-pump mode, and the single-heat-pump mode is configured to control the heat pump system to heat the air of the passenger compartment alone.

[0179] sending a second control instruction to the compressor, so that the heating capacity of the compressor reaches a maximum value;

[0180] monitoring the air temperature of the air outlet in real time;

[0181] When the temperature difference between the air temperature and the target temperature is less than or equal to a first preset threshold, a third closed-loop control instruction is sent to the compressor, so that the compressor enters a closed-loop control state.

[0182] In a possible design, the processing module 602 is configured to:

[0183] If the first heating load is greater than the load threshold, it is determined to start the hybrid mode, and the hybrid mode is used to heat air by simultaneously using at least one heat pump system and at least one cooling liquid circulation system;

[0184] sending a second control instruction to the compressor;

[0185] monitoring the cooling liquid temperature of the liquid outlet of the warm air core in real time;

[0186] when the cooling liquid temperature reaches the target temperature, sending a fourth closed-loop control instruction to the heater to make the heating device enter a closed-loop control state.

[0187] In a possible design, the monitoring module 601 is further configured to acquire a first temperature of the cooling liquid in the motor loop and a second temperature of the battery;

[0188] The processing module 602 is further configured to:

[0189] when the temperature difference between the first temperature and the second temperature is greater than or equal to a second preset threshold, sending a connection instruction to the second multi-way valve to connect the motor loop and the battery loop, and transferring heat generated by the motor operation to the battery through the cooling liquid.

[0190] It is worth noting that, Figure 6 The apparatus provided in the embodiments shown can execute the method provided in any of the method embodiments described above, and the specific implementation principles, technical features, professional term explanations and technical effects are similar, and will not be repeated here.

[0191] Figure 7 A structural schematic diagram of an electronic device is provided for the embodiments of the present application. As shown in the figure, Figure 7 The electronic device 700 can include at least one processor 701 and a memory 702. Figure 7 It is shown that the electronic device takes one processor as an example.

[0192] The memory 702 is used to store programs. Specifically, the programs can include program codes, and the program codes include computer operation instructions.

[0193] The memory 702 can include a high-speed RAM memory, and can also include a non-volatile memory such as at least one disk memory.

[0194] The processor 701 is used to execute the computer execution instructions stored in the memory 702 to implement the methods described in the above method embodiments.

[0195] The processor 701 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to perform the operations of the embodiments of the present application.

[0196] The memory 702 can be independent or integrated with the processor 701. When the memory 702 is independent of the processor 701, the electronic device 700 can further include:

[0197] The bus 703 is used to connect the processor 701 and the memory 702. The bus can be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like, but does not mean that there is only one bus or one type of bus.

[0198] Optionally, in a specific implementation, if the memory 702 and the processor 701 are integrated on a chip, the memory 702 and the processor 701 can communicate through an internal interface.

[0199] The embodiments of the present application also provide a computer readable storage medium, which can include a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes, and specifically, the computer readable storage medium stores program instructions. The program instructions are used for the methods in the above method embodiments.

[0200] The embodiments of the present application also provide a computer program product, which includes a computer program. When the computer program is executed by a processor, the method in the above method embodiments is implemented.

[0201] The embodiments of the present application also provide a computer program. When the computer program is executed by a processor, the method in the above method embodiments is implemented.

[0202] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A vehicle heating control method characterized by, The method comprises the following steps: When it is detected that the passenger compartment of the target vehicle and the battery have a simultaneous heating demand, a passenger compartment heating mode is started, the passenger compartment heating mode being used for heating air in the passenger compartment in the air conditioning box by using a heat exchanger in a heat pump system and / or a cooling liquid circulation system; Real-time monitoring is performed on whether the air temperature of the air outlet or the running time of the passenger compartment heating mode meets a first preset requirement; If yes, a shunt mode is started, and a preset control instruction is sent to the target device, the preset control instruction being used for heating the cooling liquid in the warm air circuit by using the heat pump system and shunting the cooling liquid to the battery circuit, so that the cooling liquid heats the battery, and the cooling liquid circulation system comprises the warm air circuit and the battery circuit.

2. The vehicle heating control method according to claim 1, characterized by, The starting of the shunt mode and the sending of the preset control instruction to the target device comprise the following steps: A first closed-loop control instruction is sent to a compressor in the heat pump system; A first rotating speed control instruction is sent to a water pump in the warm air circuit, so that the rotating speed of the water pump is increased from a first rotating speed to a second rotating speed in a first preset manner; A shunt instruction is sent to a first multi-way valve, the shunt instruction being used for switching a second output end of the first multi-way valve from a closed state to an open state in a second preset manner, so that the cooling liquid in the warm air circuit is introduced into the battery circuit and the battery is heated by the cooling liquid, an input end and a first output end of the first multi-way valve being connected with the warm air circuit, and the second output end being connected with the battery circuit.

3. The vehicle heating control method according to claim 2, characterized by, The starting of the shunt mode and the sending of the preset control instruction to the target device further comprise the following steps: The total heating load of the passenger compartment and the battery is acquired; It is judged whether the total heating load exceeds the heating upper limit of the heat pump system; If yes, a heater of the cooling liquid circulation system is started to perform heat compensation.

4. The vehicle heating control method according to claim 3, characterized by Before the starting of the heater of the cooling liquid circulation system to perform heat compensation, the following steps are further included: Real-time monitoring is performed on whether the air temperature of the air outlet meets a second preset requirement; If yes, the heater is started; A second closed-loop control instruction is sent to the heater; A first control instruction is sent to the compressor, so that the compressor operates at a preset rotating speed; If no, the heater is closed.

5. The vehicle heating control method according to claim 4, characterized by The starting of the passenger compartment heating mode comprises the following steps: The first heating load of the passenger compartment is acquired; If the first heating load is less than or equal to a load threshold, it is determined to start a single heat pump mode, the single heat pump mode being used for separately controlling the heat pump system to heat air in the passenger compartment; A second control instruction is sent to the compressor, so that the heating capacity of the compressor reaches a maximum value; The air temperature of the air outlet is monitored in real time; When the temperature difference between the air temperature and a target temperature is less than or equal to a first preset threshold, a third closed-loop control instruction is sent to the compressor, so that the compressor enters a closed-loop control state.

6. The vehicle heating control method according to claim 5, characterized by Further comprising the following steps: If the first heating load is greater than the load threshold, it is determined to start a composite mode, the composite mode being used for simultaneously heating air in the passenger compartment by using at least one heat pump system and at least one cooling liquid circulation system; The second control instruction is sent to the compressor; Real-time monitoring of the cooling liquid temperature of the warm air core outlet; When the cooling liquid temperature reaches the target temperature, a fourth closed-loop control instruction is sent to the heater to make the heater enter a closed-loop control state.

7. The vehicle heating control method according to any one of claims 1-6, characterized by, The cooling liquid circulation system further comprises a motor loop, and after the passenger cabin heating mode is started, the system further comprises: Obtaining a first temperature of the cooling liquid in the motor loop and a second temperature of the battery; When the temperature difference between the first temperature and the second temperature is greater than or equal to a second preset threshold, a communication instruction is sent to the second multi-way valve to communicate the motor loop and the battery loop, and the heat generated by the motor is transmitted to the battery through the cooling liquid.

8. A vehicle heating control device characterized by comprising: Comprise: The processing module is used for: When it is detected that the passenger cabin and the battery of the target vehicle have a heating demand at the same time, a passenger cabin heating mode is started, and the passenger cabin heating mode is used for heating the air in the passenger cabin in the air conditioning box by using a heat pump system and / or a heat exchanger in a cooling liquid circulation system; The monitoring module is used for real-time monitoring of the air temperature of the air outlet and whether the running time of the passenger cabin heating mode meets a first preset requirement; When the air temperature or the running time meets the first preset requirement, the processing module is further used for starting a shunt mode, and a preset control instruction is sent to a target device, the preset control instruction is used for heating the cooling liquid in the warm air loop by using the heat pump system, and the cooling liquid is shunted to the battery loop, so that the cooling liquid heats the battery, and the cooling liquid circulation system comprises the warm air loop and the battery loop.

9. An electronic device comprising: A processor, and a memory in communication connection with the processor; The memory stores computer execution instructions; The processor executes the computer execution instructions stored in the memory to realize the method in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by the processor to realize the method in any one of claims 1 to 7.

11. A computer program product comprising a computer program, which, when executed by a processor, realizes the method in any one of claims 1 to 7.

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