Vehicle Heating Control Method, Device, Machine, Medium and Program Product

Abstract

The present application provides a vehicle heating control method, device, equipment, medium and program product, which, when it is detected that there is a heating demand in both the passenger compartment and the battery of a target vehicle, starts a passenger compartment heating mode in the air conditioning box, which is used to heat the air in the passenger compartment using a heater pump system and / or a heat exchanger in a coolant circulation system, and monitors in real time whether the air temperature at the air outlet or the operation time of the passenger compartment heating mode meets a first predetermined requirement, and when the first predetermined requirement is met, starts a distribution mode and sends a predetermined control command to the target device, which is used to heat the coolant in the hot air circuit with the heater pump system and distribute the coolant to the battery circuit, so that the coolant heats the battery. The technical problem of how to distribute and control the heating capacity of a new energy vehicle is solved, and the technical effect of heating the battery with the heater pump system, not only improving the heating efficiency but also saving energy is achieved.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technologies, and more specifically, to a vehicle heating control method, apparatus, device, medium, and program product.

Background Art

[0002] With the development of vehicle technologies, new energy vehicles have already become the main trend of future vehicle development. In the conventional vehicle field, there are many solutions regarding in-vehicle environment control. However, in new energy vehicles, due to the introduction of high-power drive motors and large-capacity batteries that have a new impact on the thermal management of existing vehicles, new challenges are faced.

[0003] In low-temperature weather, when the temperature of the battery becomes low, it affects its operating performance, so it is necessary to heat the battery. However, when there is also a heating demand in the passenger compartment, since the heating capacity of the vehicle has limitations, how to realize the distribution and control of heating to the battery and the passenger compartment has become a technical problem that needs to be urgently solved in new energy vehicles.

[0004] Therefore, how to perform the distribution and control of the heating capacity of new energy vehicles is a technical problem to be solved by this application.

Summary of the Invention

Problems to be Solved by the Invention

[0005] This application aims to provide a vehicle heating control method, apparatus, device, medium, and program product that first heats the passenger compartment by a heat pump system. When the air temperature at the air outlet reaches the target temperature, the heat pump system heats the coolant by a heater core, and then takes the heated coolant into the battery circuit to conduct heat to the battery and increase the temperature of the battery, thereby solving the technical problem of how to perform the distribution and control of the heating capacity of new energy vehicles.

Means for Solving the Problem

[0006] In a first aspect, the present application discloses a vehicle heating control method, which includes, when it is detected that there is a heating demand in both the passenger compartment of the target vehicle and the battery, starting a passenger compartment heating mode used to heat-treat the air in the passenger compartment by using a heat exchanger in a heat pump system and / or a coolant circulation system in an air conditioning box; monitoring in real time whether the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets a first predetermined requirement; when the first predetermined requirement is met, starting a dispersion mode and sending a predetermined control command to a target device, where the predetermined control command is used to heat the coolant in the warm air circuit in the heat pump system and disperse the coolant to the battery circuit so that the coolant heats the battery, and the warm air circuit and the battery circuit are included in the coolant circulation system. Based on the above technical description, when there is a heating demand in both the passenger compartment and the battery, first heat the passenger compartment, and when the temperature at the air outlet meets the predetermined requirement or the heating time of the passenger compartment reaches the predetermined time, start a mode of heating both the passenger compartment and the battery. This is more efficient and energy-saving than the case of transferring heat to the warm air circuit by the heat pump system and heating the coolant by the heater in the warm air circuit. It can achieve not only the comfort of the passenger compartment but also the high-efficiency and energy-saving heating of the battery. It can further make full use of the heating capacity of the heat pump system.

[0007] In one implementation form, the step of starting the dispersion mode and sending a predetermined control command to the target device includes:

[0008] sending a first closed-loop control command to a compressor in the heat pump system; ​Sending a first rotation speed control command to a water pump in a warm air circuit to increase the rotation speed of the water pump from a first rotation speed to a second rotation speed in a first predetermined manner; Sending a distribution command to a first multi-way valve, where the distribution command is used to take in the coolant of the warm air circuit into the battery circuit and heat the battery using the coolant, and to convert the second output end of the first multi-way valve from a closed state to an open state in a second predetermined manner. The input end and the first output end of the first multi-way valve are connected to the warm air circuit, and the second output end is connected to the battery circuit.

[0009] The compressor is still used to perform closed-loop control on the air temperature at the air outlet. The first multi-way valve is configured to cooperate with the water pump. After the air in the air conditioning box is heated by the heat pump system, when the air flows through the heater core, it heats the coolant in the heater core. The heated coolant is slowly taken into the battery circuit by the cooperation of the first multi-way valve and the water pump, and the battery is heated by the battery circuit. Finally, the battery is heated by the heat pump system instead of the heater in the coolant circulation system, which is achieved because the heating efficiency of the heat pump system is higher and more energy-efficient.

[0010] In one implementation, the step of starting the distribution mode and sending a predetermined control command to the target device includes: Obtaining the total heating load of the passenger compartment and the battery; Determining whether the total heating load exceeds the heating upper limit of the heat pump system; If it is determined that it exceeds, further including the step of turning on the heater in the coolant circulation system to perform heat supplementation.

[0011] Since the heating capacity of the heat pump system has limitations, when it is insufficient to meet the common heating requirements of both the passenger compartment and the battery with the heating capacity of the heat pump system, an additional heater needs to be turned on to heat the coolant in order to make up for the shortage of heating power of the heat pump system and ensure that the passenger compartment and the battery are maintained within an appropriate operating range.

[0012] In one implementation, before the step of turning on the heater of the coolant circulation system to perform heat replenishment, the method includes monitoring in real time whether the air temperature at the air outlet meets a second predetermined requirement; if the second predetermined requirement is met, turning on the heater; sending a second closed-loop control command to the heater; sending a first control command to the compressor to operate the compressor at a predetermined rotational speed; if the second predetermined requirement is not met, turning off the heater.

[0013] To avoid the heater malfunctioning or having a shortened service life due to the heater being frequently turned on or off due to fluctuations in the air temperature at the air outlet, a second predetermined requirement within an error range for the air temperature at the air outlet is set. In this way, problems such as temperature drift of the sensor or the heater being frequently turned on or off caused by temperature fluctuations at the air outlet can be avoided.

[0014] In one implementation, the step of starting the passenger compartment heating mode includes acquiring a first heating load of the passenger compartment; if the first heating load is below the load threshold, determining to start the single heater pump mode, which is used to individually control the heater pump system to heat the air in the passenger compartment; Sending a second control command to the compressor to cause the heating capacity of the compressor to reach its maximum value; Monitoring the air temperature at the air outlet in real time; When the temperature difference between the air temperature and the target temperature is less than or equal to a first predetermined threshold value, sending a third closed-loop control command to the compressor to cause the compressor to enter a closed-loop control state.

[0015] When the first heating load is less than or equal to the load threshold value, it indicates that the heating capacity of the heat pump system alone is sufficient to meet the heating demand of the passenger compartment. Therefore, the temperature of the passenger compartment can be quickly increased with the maximum heating capacity of the compressor, improving the user experience. When the air temperature at the air outlet reaches the predetermined target temperature, the compressor is controlled in a closed loop to reduce the fluctuation of the temperature at the air outlet and achieve the technical effect of energy saving.

[0016] In one implementation form, the coolant circulation system further includes a motor circuit. After the step of starting the passenger compartment heating mode, the method further includes: Obtaining a first temperature of the coolant in the motor circuit 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 predetermined threshold value, sending a communication command to the second multi-way valve to communicate the motor circuit with the battery circuit, and transmitting the heat generated by the motor operation to the battery through the coolant.

[0017] After the vehicle starts running, heat is generated by the operation of the motor. To make full use of this heat, before turning on the heater, the battery can be heated by utilizing this heat to achieve a further energy-saving effect.

[0018] In a second aspect, the present application discloses a vehicle heating control device, which includes: When it is detected that there is a heating demand in both the passenger compartment and the battery of the target vehicle, a processing module for starting the passenger compartment heating mode, which is used to heat-treat the air in the passenger compartment by using a heat exchanger in the heat pump system and / or the coolant circulation system in the air conditioning box, A monitoring module for monitoring in real time the air temperature at the air outlet and the operating time of the passenger compartment heating mode, and When the air temperature or the operating time satisfies a first predetermined requirement, the processing module is further used to start a distributed mode and send a predetermined control command to the target device. The predetermined control command is used to heat the coolant in the warm air circuit by the heat pump system and disperse the coolant to the battery circuit, so that the coolant heats the battery. The warm air circuit and the battery circuit are included in the coolant circulation system.

[0019] In a third aspect, the present application discloses an electronic device including a processor and a memory communicably connected to the processor, The memory stores computer-executable instructions, The processor realizes any possible vehicle heating control method in the first aspect by executing the computer-executable instructions stored in the memory.

[0020] In a fourth aspect, the present application discloses a computer-readable storage medium, on which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, any possible Vehicle Heating Control method in the first aspect is realized.

[0021] In a fifth aspect, the present application discloses a computer program product including a computer program. When the computer program is executed by a processor, any possible Vehicle Heating Control method in the first aspect is realized.

[0022] In a sixth aspect, the present application discloses a computer program including program code, and when the computer program is run on a computer, the program code executes any possible Vehicle Heating Control method in the first aspect.

Advantages of the Invention

[0023] According to the above technical solution, the present application provides a vehicle heating control method, device, equipment, medium and program product. When it is detected that there is a heating demand in both the passenger compartment and the battery of the target vehicle, the passenger compartment heating mode is started, which is used to heat-treat the air in the passenger compartment by using a heat exchanger in the heater pump system and / or the coolant liquid circulation system in the air conditioning box. Then, it is monitored in real time whether the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets a first predetermined requirement. When the first predetermined requirement is met, the dispersion mode is started, and a predetermined control command is sent to the target device. The predetermined control command is used to heat the coolant liquid in the warm air circuit by the heater pump system and disperse the coolant liquid into the battery circuit, so that the coolant liquid heats the battery. The technical problem of how to allocate and control the heating capacity of new energy vehicles is solved, and the technical effect of heating the battery by the heater pump system, improving the heating efficiency and saving energy is achieved.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying out the Invention

[0025] In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, hereinafter, with reference to the drawings related to the embodiments of the present application, the technical solutions will be clearly and completely described. Naturally, the described embodiments are only a part of the embodiments of the present application, not all of them. A person skilled in the art should understand that all other embodiments obtained based on the embodiments in the present application without creative labor, including but not limited to combinations of multiple embodiments, all belong to the protection scope of the present application.

[0026] In the specification and claims of the present application, and in the above drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are for distinguishing similar objects and do not necessarily need to explain a specific order or sequence. It should be understood that the data used in this way can be appropriately exchanged so that the embodiments of the present invention described in this specification can be implemented in an order other than those illustrated or described in this specification. Also, the terms "include" and "have", and all their variations, 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 necessarily have to be limited to the explicitly listed steps or units, and may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0027] First, the terms related to the present application will be explained.

[0028] A PTC (Positive Temperature Coefficient) heater is composed of a PTC ceramic heating element and an aluminum tube. This type of PTC heating element has the advantages of low thermal resistance and high heat exchange efficiency, and is an electric heater that can automatically maintain a certain temperature and save electricity. Its special feature lies in its safety performance that in any application scenario, there is no need to worry about safety issues such as burns and fires caused by the surface "turning red" phenomenon like that of a tubular electric heater.

[0029] The inventive concept of this application is as follows. The inventor of this application found that in the prior art, generally when heating a battery to raise its temperature, the PTC heater is directly turned on to heat the coolant liquid in the battery circuit, and when the coolant liquid is circulated and flowed in the battery circuit, heat is transferred to the battery. However, compared with the PTC heater, the heat pump system heats the coolant liquid by the heater core in the air conditioning box, which is more energy-saving with higher heating efficiency. Therefore, at this time, if the heating capacity of the heat pump system cannot be fully exerted, energy will be wasted.

[0030] Therefore, how to further fully utilize the heating capacity of the heat pump system, distribute its heating capacity, and add PTC auxiliary heating at an appropriate timing to obtain excellent heating effects for both the passenger compartment and the battery, ensure the comfort of the passenger compartment, and perform efficient and energy-saving heating of the battery is extremely important in this regard.

[0031] The specific application scenario of this application is described below.

[0032] Figure 1 is a schematic diagram of the structure of an in-vehicle heater pump system and a coolant liquid circulation system according to the present application. As shown in Figure 1, the in-vehicle heater pump system includes a compressor 101, an evaporator 102, a condenser 103, a blower 104, and an air conditioning box 120, etc. The coolant liquid circulation system includes a heater core 105, a PTC heater 106, a three-way valve 107, a battery 108, a warm air circuit pump 109, a battery circuit pump 110, etc.

[0033] The compressor 101 compresses the gaseous refrigerant and then sends it to the condenser 103 for heat dissipation and condensation. At this time, the air in the passenger compartment is sent to the condenser 103 by the blower 104 for heating, and then blown back from the outlet to the passenger compartment to warm the passenger compartment. The condensed refrigerant is sent to the evaporator 102 for heat absorption and evaporation, and finally the refrigerant is returned to the compressor 101 again.

[0034] The coolant liquid circulation system includes two circuits, namely a warm air circuit and a battery circuit.

[0035] The warm air circuit starts from the warm air circuit pump 109, passes through the PTC heater 106 and the heater core 105, then flows in from the input end A of the three-way valve 107, passes through the first output end B, and returns to the warm air circuit pump 109.

[0036] The battery circuit flows in from the input end A of the three-way valve 107, passes through the second output end C, passes through the battery circuit pump 110 and the battery 108, and then returns to the warm air circuit pump 109 again.

[0037] Note that when the second output end C of the three-way valve 107 is opened, the coolant liquid heated by the heater core 105 can flow into the battery circuit.

[0038] Hereinafter, specific embodiments will be used to describe in detail the technical solution of the present application and how to solve the above technical problems using the technical solution of the present application. Some of the following specific embodiments may be combined with each other, and in some embodiments, the same or similar concepts or processes may not be described. Hereinafter, the embodiments of the present application will be described with reference to the drawings.

[0039] FIG. 2 is a flowchart of a vehicle heating control method according to an embodiment of the present application. As shown in FIG. 2, the specific steps of the vehicle heating control method include S201 to S203.

[0040] In S201, when it is detected that there is a heating demand in both the passenger compartment and the battery of the target vehicle, the passenger compartment heating mode is started.

[0041] In this step, the passenger compartment heating mode is used to heat-treat the air in the passenger compartment by using a heat pump system in the air conditioning box and / or a heat exchanger in the coolant circulation system.

[0042] Specifically, the passenger compartment heating mode has at least the following several scenarios.

[0043] (1) The air in the passenger compartment is heated using the heat pump system individually. As shown in FIG. 1, for heating, the air in the passenger compartment is blown by the blower 104 to the condenser 103 and then blown back to the passenger compartment from the outlet. At this time, the condenser 103 condenses and dissipates heat from the refrigerant sent from the compressor 101 so that heating of the air is achieved.

[0044] (2) The air in the passenger compartment is heated using the coolant circulation system individually. As shown in FIG. 1, the air in the passenger compartment is blown by the blower 104 to the heater core 105, heated, and then blown back into the passenger compartment from the air outlet. At this time, the coolant liquid is fed into the PTC heater 106 through the warm air circuit pump 109, heated, and then flows into the heater core 105, and the air is heated by the heater core 105.

[0045] (3) The air in the passenger compartment is heated using both the heat pump system and the coolant liquid circulation system. Turn on both the heat pump system and the coolant liquid circulation system for heating. That is, the air in the passenger compartment is blown by the blower 104 to the condenser 103 and the heater core 105, heated, and then blown back into the passenger compartment from the air outlet.

[0046] When there is a heating demand for both the passenger compartment and the battery of the target vehicle, ideally, if the rated heating power of each of the in-vehicle heat pump system and the coolant liquid circulation system is sufficiently large, the in-vehicle heat pump system can heat the passenger compartment individually according to the conventional heating mode (i.e., the heating principle of the air conditioning system), and the coolant liquid circulation system can also heat the battery individually according to the conventional mode (i.e., heating the coolant liquid to conduct heat to the battery). These two types of heating processes are individual heating processes and do not need to be combined.

[0047] However, in reality, due to cost constraints, the rated power of each of the in-vehicle heat pump system and the coolant 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 there is a heating demand for both the passenger compartment and the battery, or it can be said that the total heating demand power of the target vehicle exceeds the total heating power. That is, the vehicle heating control method according to the embodiment of the present application is applied to the scenario where the total heating demand power of the target vehicle exceeds the total heating power when there is a heating demand for both the passenger compartment and the battery.

[0048] However, at this time, since the total heating power of the in-vehicle heater pump system and the coolant circulation system is equal to or greater than the first heating demand power of the passenger compartment or the second heating demand power of the battery, the vehicle heating control method according to the embodiment of the present application combines the in-vehicle heater pump system and the coolant circulation system to sequentially distribute the total heating power to the first heating demand power and the second heating demand power, and gives priority to ensuring the heating demand of the passenger compartment to optimize the distribution method, thus resolving the conflict between the heating demand and the total heating supply.

[0049] In S202, it is monitored in real time whether the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets the first predetermined requirement.

[0050] In this step, the first predetermined requirement includes the requirement that the air temperature at the air outlet reaches the target blowing temperature or the requirement that the operating time of the passenger compartment heating mode is equal to or greater than the predetermined operating time Ts.

[0051] Specifically, the temperature sensor attached to the air outlet transmits the temperature signal detected in real time to the controller or the central processing module, and compares the temperature signal with the predetermined target blowing temperature in real time.

[0052] Furthermore, when starting the passenger compartment heating mode, a timer is activated simultaneously. When the time measured by the timer is equal to or greater than the predetermined operating time Ts, a feedback signal is sent to the controller or the central processing module.

[0053] In S203, when the first predetermined requirement is met, the dispersion mode is started, and a predetermined control command is sent to the target device to heat the battery with the heater pump system.

[0054] In this step, the predetermined control command is used to heat the coolant in the warm air circuit with the heater pump system and disperse the coolant to the battery circuit, so that the coolant heats the battery.

[0055] In this embodiment, the warm air circuit and the battery circuit are included in the coolant liquid circulation system.

[0056] Specifically, a first closed-loop control command is sent to the compressor in the heat pump system, a first rotational speed control command is sent to the water pump in the warm air circuit to increase the rotational speed of the water pump from a first rotational speed to a second rotational speed in a first predetermined manner, a dispersion command is sent to the first multi-way valve, and the dispersion command is used to cause the second output end of the first multi-way valve to be converted from a closed state to an open state in a second predetermined manner so as to take in the coolant liquid of the warm air circuit into the battery circuit and heat the battery using the coolant liquid. The input end and the first output end of the first multi-way valve are connected to the warm air circuit, and the second output end is connected to the battery circuit.

[0057] For example, as shown in FIG. 1, the first closed-loop control command sent to the compressor 101 includes a closed-loop control command combined with PID (Proportion Integral Differential) proportional integral differential control based on feedforward control, or a closed-loop control command combined with PI (Proportion Integral) proportional integral control based on feedforward control.

[0058] Those skilled in the art can select a necessary closed-loop control model according to the actual situation, and the present application does not limit it.

[0059] At the same time, a dispersion command is sent to the first multi-way valve serving as the three-way valve 107 to slowly open the second output end C at a predetermined opening speed. At the same time, a first rotational speed control command is sent to the warm air circuit pump 109 to slowly increase the warm air circuit pump 109 from a relatively low first rotational speed to a second rotational speed that is the target rotational speed with uniform acceleration or variable acceleration.

[0060] Note that the warm air circuit pump 109 and the three-way valve 107 operate in cooperation to control the speed at which the coolant flows into the battery circuit within a predetermined range, so as to avoid the situation where the temperature of the air outlet in the passenger compartment fluctuates due to the speed being too fast and the coolant taking away heat from the heater core 105 too quickly, resulting in a decrease in the comfort of the user in the passenger compartment during use. At the same time, the speed at which heat flows into the battery circuit is too fast, and the heating capacity of the heat pump system cannot catch up in a timely manner, and far exceeds the maximum heating capacity of the heat pump system in a very short time. As a result, the temperature of the air outlet fluctuates sharply, and in turn, the operating noise of the heat pump system also suddenly increases, which can also be avoided from affecting the user's experience during use.

[0061] Note that the three elements, namely the compressor 101, the warm air circuit pump 109, and the three-way valve 107, are configured to cooperate with each other. Those skilled in the art can flexibly combine the control commands of these three elements according to the actual application requirements. As long as the dispersion speed of the coolant is controlled within a predetermined range, it shall be included in the scope to be protected by this application.

[0062] An embodiment of the present application provides a vehicle heating control method. When it is detected that there is a heating demand for both the passenger compartment and the battery of the target vehicle, the passenger compartment heating mode is started by using a heat exchanger in the heater pump system and / or the coolant circulation system in the air conditioning box to heat the air in the passenger compartment. Then, it is monitored in real time whether the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets the first predetermined requirement. When the first predetermined requirement is met, the dispersion mode is started, and a predetermined control command is sent to the target device. The predetermined control command is used to heat the coolant in the warm air circuit with the heater pump system and disperse the coolant to the battery circuit so that the coolant heats the battery. The technical problem of how to distribute and control the heating capacity of new energy vehicles is solved, and the technical effect of heating the battery with the heater pump system, improving the heating efficiency, and saving energy is achieved.

[0063] Figure 3 is a flowchart of another vehicle heating control method according to an embodiment of the present application. As shown in Figure 3, the specific steps of the vehicle heating control method include S301 to S309.

[0064] In S301, when it is detected that there is a heating demand for both the passenger compartment and the battery of the target vehicle, the passenger compartment heating mode is started.

[0065] This step is similar to S201. In order to specifically explain it using individual embodiments below, it will not be repeatedly described here.

[0066] In S302, it is monitored in real time whether the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets the first predetermined requirement.

[0067] In this step, when the first predetermined requirement is met, S303 is continued. When the first predetermined requirement is not met, the cyclic monitoring is continued.

[0068] In this embodiment, the first predetermined requirement includes the requirement that the air temperature at the air outlet reaches the target blowing temperature, or the requirement that the operating time of the passenger compartment heating mode is equal to or greater than the predetermined operating time Ts.

[0069] In S303, the transmission of the first closed-loop control command to the compressor in the heat pump system, the transmission of the first rotation speed control command to the water pump in the warm air circuit, and the transmission of the distribution command to the first multi-way valve are performed simultaneously.

[0070] In this step, the distribution command is used to take in the coolant of the warm air circuit into the battery circuit and heat the battery using the coolant, so as to convert the second output end of the first multi-way valve from the closed state to the open state in a second predetermined manner. The input end and the first output end of the first multi-way valve are connected to the warm air circuit, and the second output end is connected to the battery circuit. The first rotation speed control command is used to increase the rotation speed of the water pump from the first rotation speed to the second rotation speed in a first predetermined manner, and the first predetermined manner is a uniform acceleration or non-uniform acceleration manner in which the acceleration is smaller than the predetermined acceleration threshold value. The first closed-loop control command includes a closed-loop control command combining feedforward control and PI control.

[0071] The three commands, namely the first closed-loop control command, the first rotation speed control command, and the first closed-loop control command, are configured to cooperate with each other, and the coolant is slowly taken from the warm air circuit into the battery circuit at a speed slower than the predetermined speed.

[0072] In S304, the total heating load of the passenger compartment and the battery is obtained.

[0073] In this step, the total heating load includes the first heating load of the passenger compartment and the second heating load of the battery.

[0074] In this embodiment, the first heating load of the passenger compartment can be calculated by the following formula. The first heating load = (target blowing temperature - actual blowing temperature) * blower air volume * specific heat of air The actual blowing temperature = outside environment temperature * percentage of outside air circulation + inside temperature * percentage of recirculated air

[0075] In this embodiment, the second heating load of the battery can be calculated by the following formula. The second heating load = (target battery temperature - battery circuit coolant temperature) * water pump delivery flow rate * specific heat of coolant

[0076] Regarding the specific calculation methods of the first heating load and the second heating load, those skilled in the art may select other calculation methods according to the actual situation, and the above formulas are only one implementation form among them.

[0077] In S305, it is determined whether the total heating load exceeds the heating upper limit of the heat pump system.

[0078] In this step, if it exceeds, step S306 is executed. If it does not exceed, the loop monitoring is continued.

[0079] In S306, it is monitored in real time whether the air temperature at the air outlet satisfies the second predetermined requirement.

[0080] In this step, the second predetermined requirement includes the requirement that the temperature difference between the air temperature at the air outlet and the target blowing temperature is equal to or greater than a predetermined temperature difference threshold.

[0081] When the coolant is taken into the battery circuit, a part of the heat that should originally be used to heat the air in the passenger compartment is taken away and used for heating the battery. As a result, the air temperature at the air outlet becomes lower than the target blowing temperature. Therefore, after starting the dispersion mode, it is necessary to detect whether the temperature difference is equal to or greater than the predetermined temperature difference threshold. If the second predetermined requirement is satisfied, it indicates that the heating capacity of the heat pump system is insufficient to meet the current total heating demand, and it is necessary to further turn on the PTC heater to use it for auxiliary heating.

[0082] When the second predetermined requirement is satisfied, step S307 is executed. Otherwise, continue the circuit monitoring until the heater of the coolant circulation system is turned on. If the heater is already on, turn it off.

[0083] In S307, turn on the heater of the coolant circulation system, send a second closed-loop control command to the heater, and at the same time, send a first control command to the compressor of the heat pump system to operate the compressor at a predetermined rotational speed.

[0084] In this step, the heater includes a PTC heater, and the PTC heater heats the coolant in the coolant pipeline of the warm air circuit by heating the coolant pipeline.

[0085] In this embodiment, the first control command includes a command to operate at the maximum rotational speed permitted in the current operation mode.

[0086] To make the air temperature at the air outlet of the passenger compartment reach the predetermined blowing temperature within the shortest possible time, turn on the compressor at the maximum heating power.

[0087] Note that the predetermined rotational speed may be set to be less than the maximum rotational speed, and those skilled in the art can set it according to the actual situation, and the present application does not limit it.

[0088] In this embodiment, the coolant circulation system further includes a motor circuit. In S302, real-time monitoring is executed, and at the same time, S308 is also executed.

[0089] In S308, obtain the first temperature of the coolant in the motor circuit and the second temperature of the battery.

[0090] In this step, in the motor circuit, in order to detect the first temperature of the coolant liquid, a temperature sensor is installed at a position such as the outlet of the motor cooling pipeline. The second temperature transmitted from the battery management system is acquired through the bus.

[0091] In S309, when the temperature difference between the first temperature and the second temperature is greater than or equal to the second predetermined threshold value, a communication command is sent to the second multi-way valve.

[0092] In this step, the communication command is used to communicate the motor circuit and the battery circuit in order to realize heating the battery using the motor circuit to increase the temperature, and to transfer the heat generated by the motor operation to the battery through the coolant liquid. Thereby, a further energy-saving technical effect is achieved.

[0093] FIG. 4 is a schematic structural diagram of another in-vehicle heater pump system and a coolant liquid circulation system according to the present application. As shown in FIG. 4, based on FIG. 1, the coolant liquid circulation system further includes a motor circuit having a four-way valve 401, a motor 402, a motor circuit pump 403, and a cooling water tank 404.

[0094] When the second multi-way valve serving as the four-way valve 401 receives the communication command, it conducts the battery circuit with the motor circuit and allows the coolant liquid in the motor circuit to flow into the battery circuit. Since heat is generated during motor operation, when this heat is transferred to the battery through the coolant liquid, the energy-saving effect is achieved.

[0095] An embodiment of the present application provides a vehicle heating control method. When it is detected that there is a heating demand for both the passenger compartment and the battery of the target vehicle, the heater pump system and / or the heat exchanger in the coolant liquid circulation system in the air conditioning box are used to heat the air in the passenger compartment, thereby starting the passenger compartment heating mode. Then, it is monitored in real time whether the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets the first predetermined requirement. When the first predetermined requirement is met, the dispersion mode is started, and a predetermined control command is sent to the target device. The predetermined control command is used to heat the coolant liquid in the warm air circuit with the heater pump system and disperse the coolant liquid into the battery circuit, so that the coolant liquid heats the battery. The technical problem of how to distribute and control the heating capacity of new energy vehicles is solved, and the technical effect of heating the battery with the heater pump system, improving the heating efficiency and saving energy is achieved.

[0096] Regarding steps S201 and S301, for the convenience of understanding, next, one possible implementation form of the passenger compartment heating mode will be specifically described. The passenger compartment heating mode may be applied when there is a heating demand for the passenger compartment individually, or may also be applied when there is a heating demand for both the passenger compartment and the battery.

[0097] Figure 5 is a flowchart of another vehicle heating control method according to an embodiment of the present application. As shown in Figure 5, the specific steps of the vehicle heating control method include S501 to S508.

[0098] In S501, when it is detected that there is a heating demand for the passenger compartment of the target vehicle, the first heating load of the passenger compartment is obtained.

[0099] In this step, the first heating load = (target blowing temperature - air temperature at the evaporator outlet) * air volume passing through the heater core * specific heat of air.

[0100] Note that the above calculation method is only one of the embodiments of the first heating load, and those skilled in the art may select other calculation methods according to the actual application scenarios, and the present application does not limit it.

[0101] In S502, when the first heating load is below the load threshold value, it is determined to start the single heater pump mode.

[0102] In this step, the single heater pump mode is used to individually control the heater pump system to heat the air in the passenger compartment.

[0103] The fact that the first heating load is below the load threshold value indicates that the heating capacity of the heater pump system alone is sufficient to meet the heating demand of the passenger compartment. Therefore, the temperature of the passenger compartment can be quickly increased with the maximum heating capacity of the compressor to improve the user's experience in use. When the air temperature at the air outlet reaches the predetermined target temperature, the compressor is controlled in a closed loop to reduce the fluctuation of the temperature at the air outlet and achieve the technical effect of energy saving.

[0104] In S503, a second control command is sent to the compressor to make the heating capacity of the compressor reach the maximum value.

[0105] In this step, the second control command includes a control command to operate the compressor at the maximum rotation speed in the current operating mode.

[0106] In S504, the air temperature at the air outlet is monitored in real time.

[0107] 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.

[0108] In S505, when the temperature difference between the air temperature and the target temperature is below the first predetermined threshold value, a third closed-loop control command is sent to the compressor to make the compressor enter the closed-loop control state.

[0109] In S506, when the first heating load is greater than the load threshold value, it is determined to start the composite mode.

[0110] In this step, the composite mode is used to heat the air by simultaneously using both at least one heat pump system and at least one coolant liquid circulation system.

[0111] In S507, the temperature of the coolant liquid at the heater core outlet is monitored in real time.

[0112] In S508, when the coolant liquid temperature reaches the target temperature, a fourth closed-loop control command is sent to the heater to heater make it enter the closed-loop control state.

[0113] Regarding each of the above steps, specifically, when there is a heating demand in the passenger compartment, based on the outside vehicle environment temperature, the inside vehicle temperature, the difference between the air temperature at the evaporator outlet and the temperature at the target air outlet, and the air volume passing through the heater core, in the initial stage, it is determined whether to select to heat the passenger compartment by individually using the compressor, or to select to heat the passenger compartment by turning on both the compressor and and the PTC heater simultaneously. When the heat pump operates alone, that is, in the single heat pump mode, first, the compressor is operated at the upper limit rotation speed of this operation mode. When the target air outlet temperature - the air outlet temperature ≤ the first predetermined threshold value T1 (T1 is a variable fixed quantity), it is converted to a closed-loop control method combining feedforward control and PI or PID. When both the heat pump and the PTC heater operate simultaneously, that is, in the composite mode, the compressor is operated at the upper limit rotation speed of this operation mode. In the initial stage, the PTC heater is operated at the maximum power that can be operated. However, when the water temperature at the heater core outlet reaches the target air outlet temperature, the PTC heater control method is converted to a closed-loop control method combining feedforward control and PI or PID.

[0114] FIG. 6 is a schematic structural diagram of a vehicle heating control device according to an embodiment of the present application. The vehicle heating control device 600 can be implemented by software, hardware, or a combination of software and hardware.

[0115] As shown in FIG. 6, the vehicle heating control unit 600 is When it is detected that there is a heating demand in both the passenger compartment of the target vehicle and the battery, it is used to heat-treat the air in the passenger compartment by using a heat exchanger in the heater pump system and / or the coolant circulation system in the air conditioning box. A processing module 602 for starting the passenger compartment heating mode, A monitoring module 601 for monitoring the air temperature at the air outlet and the operating time of the passenger compartment heating mode in real time, and When the air temperature or the operating time meets the first predetermined requirement, the processing module 602 is further used to start the dispersion mode and send a predetermined control command to the target device. The predetermined control command is used to heat the coolant in the warm air circuit by the heater pump system and disperse the coolant to the battery circuit, so that the coolant heats the battery. The warm air circuit and the battery circuit are included in the coolant circulation system.

[0116] In one possible design, the processing module 602 is Sending a first closed-loop control command to the compressor in the heater pump system, Sending a first rotational speed control command to the water pump in the warm air circuit to increase the rotational speed of the water pump from the first rotational speed to the second rotational speed in a first predetermined manner, It is used to send a distribution command to the first multi-way valve. The distribution command is used to take the coolant of the warm air circuit into the battery circuit and heat the battery using the coolant, and to convert the second output end of the first multi-way valve from the closed state to the open state in a second predetermined manner. The input end and the first output end of the first multi-way valve are connected to the warm air circuit, and the second output end is connected to the battery circuit.

[0117] In one possible design, the monitoring module 601 is further used to obtain the total heating load of the passenger compartment and the battery. The processing module 602 is further used to determine whether the total heating load exceeds the heating upper limit of the heat pump system, and if it is determined that it exceeds, to turn on the heater of the coolant circulation system to perform heat replenishment.

[0118] In one possible design, the monitoring module 601 is further used to monitor in real time whether the air temperature at the air outlet meets a second predetermined requirement. If it is met, the processing module 602 is further used to turn on the heater, send a second closed-loop control command to the heater, and send a first control command to the compressor to operate the compressor at a predetermined rotational speed. If it is not met, the processing module 602 is further used to turn off the heater.

[0119] In one possible design, the monitoring module 601 is used to obtain the first heating load of the passenger compartment. The processing module 602 When the first heating load is below the load threshold, it is used to determine to start the single heater pump mode to individually control the heat pump system to heat the air in the passenger compartment. Send a second control command to the compressor to make the heating capacity of the compressor reach the maximum value. is used for The monitoring module 601 is further monitoring the air temperature at the air outlet in real time, and when the temperature difference between the air temperature and the target temperature is equal to or less than a first predetermined threshold value, sending a third closed-loop control command to the compressor to cause the compressor to enter a closed-loop control state. It is used for the above.

[0120] In one possible design, the processing module 602 when the first heating load is greater than the load threshold value, determining to start a composite mode used to heat air by simultaneously using both at least one heat pump system and at least one coolant liquid circulation system, sending a second control command to the compressor, is used for The monitoring module 601 is further monitoring the temperature of the coolant liquid at the heater core outlet in real time, when the coolant liquid temperature reaches the target temperature, sending a fourth closed-loop control command to the heater, heater to cause it to enter a closed-loop control state. It is used for the above.

[0121] In one possible design, the monitoring module 601 is further used to obtain a first temperature of the coolant liquid in the motor circuit and a second temperature of the battery. The processing module 602 when the temperature difference between the first temperature and the second temperature is equal to or greater than a second predetermined threshold value, sending a communication command to the second multi-way valve to communicate the motor circuit and the battery circuit, and further used to transfer the heat generated by the motor operation to the battery through the coolant liquid.

[0122] It should be noted that the device provided in the embodiment according to FIG. 6 can execute the method according to the embodiment of any of the above methods. Since its specific implementation principle, technical features, explanation of technical terms, and technical effects are similar, they will not be repeated here.

[0123] FIG. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in FIG. 7, the electronic device 700 can include at least one processor 701 and a memory 702. FIG. 7 shows an electronic device taking the case where there is one processor as an example.

[0124] The memory 702 is used to store a program. Specifically, the program can include program code including computer operation instructions.

[0125] The memory 702 can include a high-speed RAM memory and can further include a non-volatile memory such as at least one magnetic disk memory.

[0126] The processor 701 executes the computer execution instructions stored in the memory 702 and is used to implement the methods described in the embodiments of the above respective methods.

[0127] The processor 701 may be a central processing unit (abbreviated as CPU) or an application specific integrated circuit (abbreviated as ASIC), or may be configured as one or more integrated circuits for implementing the embodiments of the present application.

[0128] Optionally, the memory 702 may be arranged independently or may be integrated with the processor 701. When the memory 702 is a device independent of the processor 701, the electronic device 700 can further include a bus 703 for connecting the processor 701 and the memory 702. The bus can be an industry standard architecture (ISA) bus, a peripheral component interconnect, it may also be a PCI bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be classified into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one or one type of bus.

[0129] Optionally, when actually implemented, if the memory 702 and the processor 701 are integrated and implemented on one chip, the memory 702 and the processor 701 can complete communication through an internal interface.

[0130] The embodiments of the present application further provide a computer-readable storage medium, which can include various media capable of storing program codes, such as a USB disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. Specifically, the computer-readable storage medium stores program instructions used in the methods in the embodiments of the above-mentioned various methods.

[0131] The embodiments of the present application further provide a computer program product including a computer program. When the computer program is executed by a processor, the methods in the embodiments of the above-mentioned various methods are realized.

[0132] The embodiments of the present application further provide a computer program. When the computer program is executed by a processor, the methods in the embodiments of the above-mentioned various methods are realized.

[0133] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Modifications or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present application shall be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope of the claims.

Claims

1. A vehicle heating control method, comprising: when it is detected that there is a heating demand for both the passenger compartment of the target vehicle and the battery, starting a passenger compartment heating mode, which is used to heat-treat the air in the passenger compartment by using a heat exchanger in a heat pump system and / or a coolant circulation system in an air conditioning box; monitoring in real time whether the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets a first predetermined requirement; when the air temperature at the air outlet or the operating time of the passenger compartment heating mode meets the first predetermined requirement, starting a dispersion mode and sending a predetermined control command to a target device, wherein the predetermined control command is used to heat the coolant in the warm air circuit by the heat pump system and disperse the coolant 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. A vehicle heating control method characterized by this.

2. The step of starting the dispersion mode and sending a predetermined control command to the target device includes: sending a first closed-loop control command to a compressor in the heat pump system; sending a first rotational speed control command to a water pump in the warm air circuit to increase the rotational speed of the water pump from a first rotational speed to a second rotational speed in a first predetermined manner; sending a dispersion command to a first multi-way valve, wherein the dispersion command is used to take in the coolant of the warm air circuit into the battery circuit and heat the battery by using the coolant, and to convert the second output end of the first multi-way valve from a closed state to an open state in a second predetermined manner. The input end and the first output end of the first multi-way valve are connected to the warm air circuit, and the second output end is connected to the battery circuit. The vehicle heating control method according to Claim 1, characterized by this.

3. The step of starting the dispersion mode and sending a predetermined control command to the target device includes: obtaining the total heating load of the passenger compartment and the battery; determining whether the total heating load exceeds the heating upper limit of the heat pump system; When the total heating load exceeds the heating upper limit of the heat pump system, further comprising the step of turning on the heater of the coolant liquid circulation system to perform heat replenishment, the vehicle heating control method according to claim 2, characterized in that.

4. Before the step of turning on the heater of the coolant liquid circulation system to perform heat replenishment, The step of monitoring in real time whether the air temperature at the air outlet satisfies a second predetermined requirement; When the air temperature at the air outlet satisfies the second predetermined requirement, the step of turning on the heater; The step of transmitting a second closed-loop control command to the heater; The step of transmitting a first control command to the compressor to operate the compressor at a predetermined rotational speed; When the air temperature at the air outlet does not satisfy the second predetermined requirement, further comprising the step of turning off the heater, the vehicle heating control method according to claim 3, characterized in that.

5. The step of starting the passenger compartment heating mode includes The step of obtaining the first heating load of the passenger compartment; When the first heating load is below the load threshold value, determining to start the single heater pump mode, which is used to individually control the heat pump system to heat the air in the passenger compartment; The step of transmitting a second control command to the compressor to bring the heating capacity of the compressor to the maximum value; The step of monitoring the air temperature at the air outlet in real time; When the temperature difference between the air temperature and the target temperature is below a first predetermined threshold value, transmitting a third closed-loop control command to the compressor to bring the compressor into a closed-loop control state, the vehicle heating control method according to claim 3 or 4, characterized in that.

6. When the first heating load is greater than the load threshold value, determining to start the composite mode, which is used to heat the air by simultaneously using both at least one of the heat pump systems and at least one of the coolant liquid circulation systems; The step of transmitting the second control command to the compressor; The step of monitoring the temperature of the coolant liquid at the heater core outlet in real time; When the coolant temperature reaches the target temperature, further comprising the step of transmitting a fourth closed-loop control command to the heater so that the heater enters a closed-loop control state, The vehicle heating control method according to claim 5, characterized in that.

7. The coolant circulation system further includes a motor circuit, and after the step of starting the passenger compartment heating mode, Obtaining a first temperature of the coolant in the motor circuit 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 predetermined threshold, transmitting a communication command to a second multi-way valve to communicate the motor circuit and the battery circuit, and transmitting heat generated by motor operation to the battery through the coolant, The vehicle heating control method according to any one of claims 1 to 6, further comprising the step of:

8. A vehicle heating control device, When it is detected that there is a heating demand for both the passenger compartment of the target vehicle and the battery, a processing module for starting a passenger compartment heating mode, which is used to heat the air in the passenger compartment by using a heat exchanger in a heat pump system and / or a coolant circulation system in an air conditioning box; A monitoring module for real-time monitoring of the air temperature at the air outlet and the operating time of the passenger compartment heating mode; When the air temperature or the operating time satisfies a first predetermined requirement, the processing module further starts a distributed mode and is further used to transmit a predetermined control command to a target device, and the predetermined control command is used to heat the coolant in a warm air circuit in the heat pump system and distribute the coolant to a battery circuit, so that the coolant heats the battery, and the coolant circulation system includes the warm air circuit and the battery circuit, A vehicle heating control device, characterized in that.

9. An electronic device comprising a processor and a memory communicably connected to the processor, The memory stores computer-executable instructions, The processor realizes the vehicle heating control method according to any one of claims 1 to 7 by executing the computer-executable instructions stored in the memory, An electronic device.

10. A computer-readable storage medium having computer-executable instructions stored thereon, the computer-executable instructions being used to implement the method according to any one of claims 1 to 7 when executed by a processor. A computer-readable storage medium characterized by this.

11. A computer program including program code, when the computer operates the computer program, the computer executes the method according to any one of claims 1 to 7 based on the program code. A computer program characterized by this.

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