Vehicle thermal management system control method, vehicle thermal management system and vehicle

Abstract

The invention discloses a vehicle thermal management system control method, a vehicle thermal management system and a vehicle, the method is applied to the vehicle thermal management system, and the vehicle thermal management system comprises an air source heat pump heating loop, a battery heating branch and a communication branch used for communicating the air source heat pump heating loop with the battery heating branch. The control method comprises the steps that whether the vehicle heat management system is switched to an air source heat pump heating working mode corresponding to an air source heat pump heating loop or not is judged; and if yes, the communication branch is opened, so that the refrigerant in the battery heating branch is conveyed into the air source heat pump heating loop. According to the technical scheme, the battery heating branch is used for supplementing the refrigerant for the air source heat pump heating loop, so that the problem that the refrigerant of the air source heat pump heating loop is insufficient is solved, the heating effect of a passenger compartment is guaranteed, and due to the fact that an additional refrigerant supplementing device does not need to be arranged, the heating efficiency is improved. The heating cost of a passenger compartment and the complexity of a vehicle heat management system can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a vehicle thermal management system control method, a vehicle thermal management system and a vehicle. Background Art

[0002] When a vehicle is used in a low temperature environment, the passenger compartment on the vehicle needs to be heated to improve comfort.

[0003] Currently, when an air conditioning system is used to heat a passenger compartment, the heating effect of the passenger compartment may be reduced due to insufficient refrigerant.

[0004] In summary, how to ensure the heating effect of the passenger compartment is a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a vehicle thermal management system control method, a vehicle thermal management system and a vehicle, so as to ensure the heating effect of the passenger compartment.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A vehicle thermal management system control method is applied to a vehicle thermal management system, wherein the vehicle thermal management system includes an air source heat pump heating circuit for heating a passenger compartment in a vehicle, a battery heating branch for heating a battery in the vehicle, and a connecting branch for connecting the air source heat pump heating circuit and the battery heating branch. The vehicle thermal management system control method includes:

[0008] Determining whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit;

[0009] If so, the connecting branch is opened to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit.

[0010] Optionally, after the connecting branch is opened to introduce the refrigerant in the battery heating branch into the air source heat pump heating circuit, the method further includes:

[0011] When the opening time of the connecting branch reaches a preset time, the connecting branch is closed.

[0012] Optionally, the battery heating branch includes a direct cooling plate, a first control valve connected to the direct cooling plate and the connecting branch, the connecting branch includes a first branch located at a first end of the direct cooling plate and connected to the first control valve and the air source heat pump heating circuit, and a second branch located at a second end of the direct cooling plate and connected to the direct cooling plate and the air source heat pump heating circuit. When the connecting branch is opened, it also includes:

[0013] The first control valve is opened, and when the opening time of the first control valve reaches the preset time, the first control valve is closed.

[0014] Optionally, after closing the connecting branch and the first control valve, the method further includes:

[0015] Determining whether the pressure in the air source heat pump heating circuit is greater than or equal to a first pressure threshold;

[0016] If the pressure in the air source heat pump heating circuit is greater than or equal to the first pressure threshold, the first branch and the first control valve are opened to transport the refrigerant in the air source heat pump heating circuit to the direct cooling plate;

[0017] Determine whether the pressure in the air source heat pump heating circuit is less than or equal to a second pressure threshold; the second pressure threshold is less than the first pressure threshold;

[0018] If the pressure in the air source heat pump heating circuit is greater than the second pressure threshold, keeping the first branch and the first control valve open;

[0019] If the pressure of the air source heat pump heating circuit is less than or equal to the second pressure threshold, the first branch and the first control valve are closed.

[0020] Optionally, when judging whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it also includes:

[0021] Determining whether the battery heating branch has refrigerant stored;

[0022] If the vehicle thermal management system is switched to the air source heat pump heating working mode and the battery heating branch stores refrigerant, the step of opening the connecting branch to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit is performed.

[0023] Optionally, determining whether the battery heating branch stores refrigerant includes:

[0024] Obtaining the overheat of the direct cooling plate in the battery heating branch, and determining whether the overheat of the direct cooling plate is less than an overheat threshold;

[0025] If so, it is determined that refrigerant is stored in the battery heating branch.

[0026] Optionally, the battery heating branch includes a water source heat pump battery heating circuit and a PTC heating water circuit for supplying heat source to the water source heat pump battery heating circuit, the PTC heating water circuit includes a heater core, and when the PTC heating water circuit only supplies heat source to the water source heat pump battery heating circuit, the heater core is closed. Before determining whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it also includes:

[0027] determining whether a dual heating request for passenger compartment heating and battery heating is received;

[0028] If so, dual heating is performed using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit; wherein the air source heat pump heating circuit and the PTC heating water circuit are used to heat the passenger compartment, and the water source heat pump battery heating circuit and the PTC heating water circuit are used to heat the battery.

[0029] Optionally, when the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit are used for dual heating, the method further includes:

[0030] Determining whether the temperature of the passenger compartment passage meets the first heating requirement and whether the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit;

[0031] If the temperature of the passage in the passenger compartment does not meet the first heating demand or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, the dual heating using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit is switched to dual heating using the water source heat pump battery heating circuit and the PTC heating water circuit; wherein the PTC heating water circuit is used to heat the passenger compartment and to provide a heat source for the water source heat pump battery heating circuit, and the water source heat pump battery heating circuit is used to heat the battery.

[0032] Optionally, switching from using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual-harvesting heating to using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-harvesting heating includes:

[0033] Switching from using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual heating to using the air source heat pump heating circuit and the PTC heating water circuit to heat the passenger compartment;

[0034] Determining whether the temperature of the passenger compartment passage meets the second heating requirement and whether the temperature of the PTC heating water path meets the set condition;

[0035] If yes, switching from using the air source heat pump heating circuit and the PTC heating water circuit to heat the passenger compartment to using the PTC heating water circuit to heat the passenger compartment;

[0036] Switch from using the PTC heating water circuit to heat the passenger compartment to using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-source heating.

[0037] Optionally, if it is determined that the temperature of the passenger compartment passage does not meet the first heating demand or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, the method further includes:

[0038] Set the passenger compartment heating insufficient flag to be valid;

[0039] Upon receiving a dual heating request for cabin heating and battery heating, it also includes:

[0040] Determining whether the passenger compartment heating deficiency flag is valid;

[0041] If not, the step of performing dual heating using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit is performed;

[0042] If so, the water source heat pump battery heating circuit and the PTC heating water circuit are used for dual-use heating.

[0043] A vehicle thermal management system, using any of the above vehicle thermal management system control methods to control the vehicle thermal management system, the vehicle thermal management system comprising an air source heat pump heating circuit, a battery heating branch and a connecting branch, wherein:

[0044] The air source heat pump heating circuit is used to heat the passenger compartment in the vehicle;

[0045] The battery heating branch is used to heat the battery in the vehicle;

[0046] The connecting branch is used to connect the air source heat pump heating circuit and the battery heating branch.

[0047] A vehicle comprises a vehicle thermal management system as described in any one of the above items, and the vehicle is used to implement the steps of the vehicle thermal management system control method as described in any one of the above items.

[0048] The present invention provides a vehicle thermal management system control method, a vehicle thermal management system and a vehicle, wherein the method is applied to a vehicle thermal management system, the vehicle thermal management system includes an air source heat pump heating circuit for heating a passenger compartment in the vehicle, a battery heating branch for heating a battery in the vehicle, and a connecting branch for connecting the air source heat pump heating circuit and the battery heating branch. The vehicle thermal management system control method includes: determining whether the vehicle thermal management system is switched to an air source heat pump heating working mode corresponding to the air source heat pump heating circuit; if so, opening the connecting branch to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit.

[0049] The above technical solution disclosed in the present invention, each time the air source heat pump heating working mode corresponding to the air source heat pump heating circuit is switched, the connecting branch connected to the air source heat pump heating circuit and the battery heating branch is opened to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit, thereby solving the problem of insufficient refrigerant in the air source heat pump heating circuit, ensuring the heating effect of the passenger compartment, and improving the comfort of the vehicle users. Moreover, the refrigerant supplementation operation of the present invention does not need to be realized by setting up an additional refrigerant supplementation device, therefore, the heating cost of the passenger compartment and the complexity of the vehicle thermal management system can be reduced.

[0050] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A flow chart of a vehicle thermal management system control method provided by an embodiment of the present invention;

[0052] Figure 2 A flow chart of another vehicle thermal management system control method provided by an embodiment of the present invention;

[0053] Figure 3 A flow chart of another vehicle thermal management system control method provided by an embodiment of the present invention;

[0054] Figure 4 A flow chart of another vehicle thermal management system control method provided by an embodiment of the present invention;

[0055] Figure 5 A schematic diagram of the structure of a vehicle thermal management system provided by an embodiment of the present invention;

[0056] Figure 6A control flow chart of a control valve in a vehicle thermal management system during dual-energy heating provided by an embodiment of the present invention;

[0057] Figure 7 A control flow chart of corresponding control valves when performing refrigerant supplementation operation for an air source heat pump heating circuit provided in an embodiment of the present invention.

[0058] The reference numerals are described as follows:

[0059] 1-air source heat pump heating circuit, 2-battery heating branch, 3-connecting branch, 31-first branch, 32-second branch, 101-direct cooling plate, 102-first control valve, 103-compressor, 104-internal condenser, 105-second control valve, 106-third control valve, 107-liquid storage drying tank, 108-coaxial tube, 109-fourth control valve, 110-external heat exchanger, 111-first check valve, 112-fifth control valve, 113-second check valve, 114-throttle hole, 115-first temperature and pressure sensor, 116-sixth control valve, 117-waste heat plate exchange, 11 8-the seventh control valve, 119-water pump, 120-water PTC, 121-heater core, 122-four-way valve, 123-engine, 124-the eighth control valve, 125-the ninth control valve, 126-the third one-way valve, 127-the tenth control valve, 128-the first pressure sensor, 129-the first temperature sensor, 130-the second temperature sensor, 131-the eleventh control valve, 132-the third temperature sensor, 133-the second pressure sensor, 134-the second temperature and pressure sensor, 135-the third temperature and pressure sensor, 136-the fourth temperature and pressure sensor, 137-evaporator. DETAILED DESCRIPTION

[0060] The core of the present invention is to provide a vehicle thermal management system control method, a vehicle thermal management system and a vehicle, so as to ensure the heating effect of the passenger compartment.

[0061] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0062] See also Figure 1, which shows a flow chart of a vehicle thermal management system control method provided by an embodiment of the present invention. A vehicle thermal management system control method provided by an embodiment of the present invention is applied to a vehicle thermal management system. The vehicle thermal management system may include an air source heat pump heating circuit for heating a passenger compartment in a vehicle, a battery heating branch for heating a battery in a vehicle, and a connecting branch for connecting the air source heat pump heating circuit and the battery heating branch. The vehicle thermal management system control method may include:

[0063] S11: Determine whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit; if so, execute step S12;

[0064] S12: Open the connecting branch to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit.

[0065] In an embodiment of the present invention, the vehicle thermal management system may include an air source heat pump heating circuit, a battery heating branch and a connecting branch. The air source heat pump heating circuit can be used to heat the passenger compartment in the vehicle using the refrigerant in the circuit and the heat from the outside when the vehicle user has a heating demand, the passenger compartment heating is automatically turned on in a low temperature environment, etc., so as to improve the comfort of the passenger compartment in the vehicle. The battery heating branch can be used to heat the battery in the vehicle using the refrigerant in the corresponding branch when the vehicle user has a battery (i.e., the power battery in the vehicle) heating demand, the battery heating is automatically turned on in a low temperature environment, etc., so as to improve the charging and discharging performance of the battery in the vehicle. The connecting branch is connected between the air source heat pump heating circuit and the battery heating branch, and is used to connect the air source heat pump heating circuit and the battery heating branch, so as to facilitate the use of the battery heating branch to supplement the refrigerant operation for the air source heat pump heating circuit. It should be noted that the vehicle mentioned in the embodiment of the present invention is a vehicle including a battery, which can be an electric vehicle or a hybrid vehicle.

[0066] When the amount of refrigerant in the air source heat pump heating circuit is insufficient, the low pressure in the circuit will be too low, so that the appropriate outlet air temperature cannot be output, thereby affecting the comfort in the vehicle. In order to enable the air source heat pump heating circuit to output a suitable outlet air temperature and improve the comfort in the vehicle, the embodiment of the present invention can appropriately connect the air source heat pump heating circuit and the battery heating branch when the air source heat pump heating circuit is used for heating (that is, when the vehicle thermal management system is switched to the air source heat pump heating working mode) to discharge the refrigerant in the battery heating branch into the air source heat pump heating circuit, thereby replenishing the refrigerant for the air source heat pump heating circuit without the aid of any additional refrigerant replenishing device, so that the air source heat pump heating circuit can have enough refrigerant, so that the air source heat pump heating circuit can output a suitable outlet air temperature to improve the heating comfort and ensure the heating effect. Among them, the execution subject of the vehicle thermal management system control method provided by the embodiment of the present invention can be specifically the vehicle where the vehicle thermal management system is located.

[0067] Specifically, it can be determined whether the vehicle thermal management system has switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, that is, whether the heat source is an air source heat pump, wherein the air source heat pump heating working mode corresponding to the air source heat pump heating circuit mentioned here means that only the air source heat pump heating circuit of the vehicle thermal management system is working to heat the passenger compartment, and the battery heating branch in the vehicle thermal management system is not working, and the situation of switching to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit can be specifically switching from other modes to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, or it can be from no mode running to switching to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, etc.

[0068] When the vehicle thermal management system has not switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it is determined that the battery heating branch is not satisfied for the air source heat pump heating circuit to supplement the refrigerant operation. At this time, step S11 can be continued. When the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it is determined that the battery heating branch is satisfied for the air source heat pump heating circuit to supplement the refrigerant operation. At this time, the connecting branch can be opened to introduce the refrigerant stored in the battery heating branch into the air source heat pump heating circuit, so that the air source heat pump heating circuit has enough refrigerant to avoid the problem of insufficient refrigerant in the air source heat pump heating circuit, so as to ensure the heating effect of the passenger compartment.

[0069] In addition, in order to ensure the stability of the vehicle thermal management system and improve the accuracy of the judgment, while judging whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it is also possible to judge whether the speed of the compressor in the vehicle thermal management system (the compressor is included in the air source heat pump heating circuit) is equal to 0, that is, to judge whether the compressor is in a non-operating state. When the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit and the speed of the compressor is equal to 0, the connecting branch is opened.

[0070] The above technical solution disclosed in the present invention, each time the air source heat pump heating working mode corresponding to the air source heat pump heating circuit is switched, the connecting branch connected to the air source heat pump heating circuit and the battery heating branch is opened to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit, thereby solving the problem of insufficient refrigerant in the air source heat pump heating circuit, ensuring the heating effect of the passenger compartment, and improving the comfort of the vehicle users. Moreover, the refrigerant supplementation operation of the present invention does not need to be realized by setting up an additional refrigerant supplementation device, therefore, the heating cost of the passenger compartment and the complexity of the vehicle thermal management system can be reduced.

[0071] A vehicle thermal management system control method provided by an embodiment of the present invention may further include, after opening the connecting branch to introduce the refrigerant in the battery heating branch into the air source heat pump heating circuit:

[0072] When the opening time of the connecting branch reaches the preset time, the connecting branch is closed.

[0073] In an embodiment of the present invention, after the connecting branch is opened to introduce the refrigerant in the battery heating branch into the air source heat pump heating circuit, the connecting branch can be closed when the opening time of the connecting branch reaches a preset time to complete the operation of using the battery heating branch to supplement the refrigerant for the air source heat pump heating circuit. The preset time can be set according to actual conditions, for example, 20 seconds.

[0074] By closing the connecting branch after it has been opened for a preset period of time, excessive pressure in the air source heat pump heating circuit due to excessive refrigerant replenishment can be avoided, thereby ensuring the reliability of the vehicle thermal management system and the safety of the vehicle.

[0075] See also Figure 2, which shows a flow chart of another vehicle thermal management system control method provided by an embodiment of the present invention. A vehicle thermal management system control method provided by an embodiment of the present invention, the battery heating branch may include a direct cooling plate, a first control valve connected to the direct cooling plate and a connecting branch, the connecting branch may include a first branch located at the first end of the direct cooling plate and connected to the first control valve and an air source heat pump heating circuit, and a second branch located at the second end of the direct cooling plate and connected to the direct cooling plate and the air source heat pump heating circuit. When the connecting branch is opened, it may also include:

[0076] The first control valve is opened, and when the opening time of the first control valve reaches a preset time, the first control valve is closed.

[0077] In an embodiment of the present invention, a vehicle thermal management system may include a direct cooling plate, a first control valve connected to the direct cooling plate and a connecting branch. The direct cooling plate may be attached to a battery in a vehicle, and is used to exchange heat with the battery when the battery heating branch is turned on and works, so as to achieve heating of the battery. The first control valve is located at the first end of the direct cooling plate and is connected to the first end of the direct cooling plate. The first control valve may specifically be a solenoid valve or an electronic expansion valve. The first control valve not only plays a role in whether the battery heating branch heats the battery in the vehicle, but also plays a role in the battery heating branch to supplement the refrigerant to the air source heat pump heating circuit, that is, the battery heating branch can be used to supplement the refrigerant for the air source heat pump heating circuit only when the connecting branch and the first control valve are opened at the same time. The connecting branch may include a first branch located at the first end of the direct cooling plate and connected to the first control valve and the air source heat pump heating circuit, and a second branch located at the second end of the direct cooling plate and connected to the second end of the direct cooling plate and the air source heat pump heating circuit. The first branch is connected to the direct cooling plate through the first control valve.

[0078] On the basis of the above, in order to ensure the smooth progress of the refrigerant replenishment operation, the first control valve in the battery heating branch can be opened while opening the connecting branch. Like the opening of the connecting branch, the first control valve is also closed when the opening time of the first control valve reaches the preset time, so as to minimize the excessive pressure in the air source heat pump heating circuit.

[0079] A vehicle thermal management system control method provided by an embodiment of the present invention may further include, after closing the connecting branch and the first control valve:

[0080] Determine whether the pressure in the air source heat pump heating circuit is greater than or equal to a first pressure threshold;

[0081] If the pressure in the air source heat pump heating circuit is greater than or equal to the first pressure threshold, the first branch and the first control valve are opened to transport the refrigerant in the air source heat pump heating circuit to the direct cooling plate;

[0082] Determine whether the pressure in the air source heat pump heating circuit is less than or equal to a second pressure threshold; the second pressure threshold is less than the first pressure threshold;

[0083] If the pressure in the air source heat pump heating circuit is greater than the second pressure threshold, the first branch and the first control valve are kept open;

[0084] If the pressure of the air source heat pump heating circuit is less than or equal to the second pressure threshold, the first branch and the first control valve are closed.

[0085] In an embodiment of the present invention, after closing the connecting branch and the first control valve, it can be determined whether the pressure in the air source heat pump heating circuit is greater than or equal to the first pressure threshold value P1. The pressure in the air source heat pump heating circuit can be obtained by measuring and correcting the pressure at the outlet of the internal condenser, that is, the high pressure in the air source heat pump heating circuit can be obtained to improve the accuracy of the pressure judgment. P1 can be calibrated by the actual working conditions, for example, it can be 2.3Mpa. If the pressure of the air source heat pump heating circuit is less than the first pressure threshold value, it indicates that the pressure in the air source heat pump heating circuit is not too high. Therefore, it is possible to continue to determine whether the pressure in the air source heat pump heating circuit is greater than or equal to the first pressure threshold value P1, or the determination can be ended directly. If the pressure in the air source heat pump heating circuit is greater than or equal to the first pressure threshold, it indicates that the pressure in the air source heat pump heating circuit is too high. At this time, the first branch and the first control valve can be opened to transport the refrigerant in the air source heat pump heating circuit (that is, the excess refrigerant in the air source heat pump heating circuit) to the direct cooling plate for storage, that is, the air source heat pump heating circuit can be controlled to reduce the refrigerant and pressure.

[0086] When the first branch and the first control valve are opened to transport the excess refrigerant in the air source heat pump heating circuit to the direct cooling plate, it can be determined whether the pressure in the air source heat pump heating circuit is less than or equal to the second pressure threshold value P2, wherein P2 is less than P1, and P2 can be calibrated by the actual working conditions, for example, when P1 is 2.3Mpa, P2 can be 2.0Mpa. If the pressure in the air source heat pump heating circuit is greater than the second pressure threshold value, it indicates that the pressure in the air source heat pump heating circuit is still high. At this time, the first branch and the first control valve can be kept open so that the refrigerant in the air source heat pump heating circuit can continue to be transported to the direct cooling plate in the battery heating branch. If the pressure in the air source heat pump heating circuit is not greater than the second pressure threshold value, it indicates that the pressure in the light air source heat pump heating circuit is within a reasonable range. At this time, the first branch and the first control valve can be closed so that the refrigerant in the air source heat pump heating circuit is no longer transported to the direct cooling plate in the battery heating branch.

[0087] The above method can ensure that the pressure in the air source heat pump heating circuit is within the appropriate pressure range, so as to improve the stability of the vehicle thermal management system operation and enhance the heating comfort of the air-conditioning system.

[0088] A vehicle thermal management system control method provided by an embodiment of the present invention may further include, when determining whether the vehicle thermal management system is switched to an air source heat pump heating working mode corresponding to an air source heat pump heating circuit:

[0089] Determine whether refrigerant is stored in the battery heating branch;

[0090] If the vehicle thermal management system is switched to the air source heat pump heating working mode and the battery heating branch stores refrigerant, the step of opening the connecting branch is executed to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit.

[0091] In an embodiment of the present invention, in order to improve the reliability of the battery heating branch circuit's operation of replenishing refrigerant to the air source heat pump heating circuit, while judging whether the vehicle thermal management system has switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it is also possible to judge whether refrigerant is stored in the battery heating branch circuit. If the vehicle thermal management system switches to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit and refrigerant is stored in the battery heating branch circuit, the connecting branch circuit is opened to introduce the refrigerant stored in the battery heating branch circuit into the air source heat pump heating circuit, so that the air source heat pump heating circuit has sufficient refrigerant, avoiding the problem of insufficient refrigerant in the air source heat pump heating circuit, and ensuring the heating effect of the passenger compartment.

[0092] An embodiment of the present invention provides a vehicle thermal management system control method, which determines whether a battery heating branch has refrigerant stored therein, and may include:

[0093] Obtain the overheat of the direct cooling plate in the battery heating branch, and determine whether the overheat of the direct cooling plate is less than the overheat threshold;

[0094] If so, it is determined that refrigerant is stored in the battery heating branch.

[0095] The battery heating branch includes a direct cooling plate. When judging whether refrigerant is stored in the battery heating branch, the overheat of the direct cooling plate in the battery heating branch can be obtained first, and then the overheat of the direct cooling plate can be judged whether it is less than the overheat threshold. If the overheat of the direct cooling plate is less than the overheat threshold, it is determined that refrigerant is stored in the battery heating branch. If the overheat of the direct cooling plate is not less than the overheat threshold, it is determined that no refrigerant is stored in the battery heating branch. The superheat is the difference between the superheat temperature and the saturation temperature of the refrigerant at the same evaporation pressure in the refrigeration cycle. In layman's terms, the superheat is the temperature at which the actual temperature of the working fluid is higher than the saturation temperature corresponding to the actual pressure. The overheat threshold can be calibrated by actual conditions, etc., or it can be obtained by other means. For example, the overheat threshold can be 3 or other values. A low superheat of the direct cooling plate indicates that refrigerant is present at the direct cooling plate.

[0096] See also Figure 3 , which shows a flow chart of another vehicle thermal management system control method provided by an embodiment of the present invention. A vehicle thermal management system control method provided by an embodiment of the present invention, the battery heating branch may include a water source heat pump battery heating circuit and a PTC (Positive Temperature Coefficient, a general term for semiconductor materials or components with a large positive temperature coefficient, which is a vehicle heater in a vehicle) heating water circuit for supplying heat source to the water source heat pump battery heating circuit, the PTC heating water circuit may include a heater core, and the heater core is closed when the PTC heating water circuit only supplies heat source to the water source heat pump battery heating circuit, and before judging whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it may also include:

[0097] determining whether a dual heating request for passenger compartment heating and battery heating is received;

[0098] If so, dual heating is performed using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit; wherein the air source heat pump heating circuit and the PTC heating water circuit are used to heat the passenger compartment, and the water source heat pump battery heating circuit and the PTC heating water circuit are used to heat the battery.

[0099] In an embodiment of the present invention, the battery heating branch may specifically include a water source heat pump battery heating circuit and a PTC heating water circuit. The water source heat pump battery heating circuit is used to heat the battery in the vehicle through the refrigerant in the circuit. The PTC heating water circuit contains a water PTC, and the water PTC can heat the water temperature in the PTC heating water circuit to provide a heat source for the water source heat pump battery heating circuit. By setting up the PTC heating water circuit, the heating capacity under low temperature conditions can be improved. Among them, the PTC heating water circuit contains a heater core, which is used to heat the passenger compartment, that is, in the embodiment of the present invention, not only can the air source heat pump heating circuit be used to heat the passenger compartment, but also the PTC heating water circuit can be used to heat the passenger compartment (that is, the PTC heating water circuit can perform two-way heating of the passenger compartment and the battery).

[0100] From the above, it can be seen that the PTC heating water circuit can not only be used to provide a heat source for the water source heat pump battery heating circuit, but also can be used to heat the passenger compartment, that is, the PTC heating circuit can be used for bidirectional heating of the passenger compartment and the battery. When the PTC heating water circuit is used for heating the passenger compartment, hot water is transported to the heater core to heat the air inlet temperature of the air conditioner. When the PTC heating water circuit is used for battery heating, heat can be transferred to the refrigerant in the water source heat pump battery heating circuit, thereby providing thermal energy for battery heating. Among them, the heater core can be turned off when the PTC heating water circuit is only used to supply a heat source for the water source heat pump battery heating circuit.

[0101] On the basis of the above, before judging whether the vehicle thermal management system switches to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it can also be judged whether a dual-collection heating request for passenger compartment heating and battery heating is received. The dual-collection heating request can be sent by the vehicle user, or it can be automatically turned on when the vehicle detects that the ambient temperature is lower than the preset temperature value (the preset temperature value can be set according to actual conditions, that is, when the vehicle is in a low temperature environment) and is in operation.

[0102] If no dual-exploitation heating request for passenger compartment heating and battery heating is received, it can be determined whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, that is, step S11 can be executed. If a dual-exploitation heating request for passenger compartment heating and battery heating is received, the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit can be turned on at the same time, and the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit are used for dual-exploitation heating. At this time, the warm air core in the PTC heating water circuit is turned on and works. Among them, the air source heat pump heating circuit and the PTC heating water circuit are used to heat the passenger compartment, and the water source heat pump battery heating circuit and the PTC heating water circuit are used to heat the battery.

[0103] Through the above method, the dual heating demand is guaranteed to improve the comfort and performance of the vehicle.

[0104] See also Figure 4 , which shows a flow chart of another vehicle thermal management system control method provided by an embodiment of the present invention. A vehicle thermal management system control method provided by an embodiment of the present invention, when using an air source heat pump heating circuit, a water source heat pump battery heating circuit and a PTC heating water circuit for dual heating, may also include:

[0105] Determine whether the temperature of the aisle in the passenger compartment meets the first heating demand and whether the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit;

[0106] If the temperature of the aisle in the passenger compartment does not meet the first heating demand or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, the dual-energy heating using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit is switched to dual-energy heating using the water source heat pump battery heating circuit and the PTC heating water circuit; wherein the PTC heating water circuit is used to heat the passenger compartment and to provide a heat source for the water source heat pump battery heating circuit, and the water source heat pump battery heating circuit is used to heat the battery.

[0107] When using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual heating, since the compressor in the vehicle thermal management system simultaneously delivers the refrigerant to the air source heat pump heating circuit and the water source heat pump battery heating circuit, insufficient heating of the passenger compartment may occur. In order to solve this problem, when using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual heating, it can be determined whether the temperature of the passage in the passenger compartment meets the first heating demand, and at the same time determine whether the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit. If it is determined that the temperature of the passage in the passenger compartment meets the first heating demand, it means that the temperature of the passage meets the requirement, which means that the heating in the passenger compartment is sufficient. If it is determined that the temperature of the passage in the passenger compartment does not meet the first heating demand, it means that the temperature of the passage in the passenger compartment does not meet the requirement, which means that the heating in the passenger compartment is insufficient. If the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit, it means that the heating capacity of the PTC heating water circuit is not as strong as the heating capacity of the air source heat pump heating circuit. If the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, it means that the heating capacity of the PTC heating water circuit is stronger than the heating capacity of the air source heat pump heating circuit. Therefore, based on the above judgment, if the temperature of the passage in the passenger compartment does not meet the first heating demand or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, it is possible to switch from using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual-harvesting heating to using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-harvesting heating. At this time, this state can be maintained for dual-harvesting heating, that is, the water source heat pump battery heating circuit and the PTC heating water circuit are used for passenger compartment heating and battery heating, wherein the PTC heating water circuit is not only used to heat the passenger compartment, but also used to supply heat source to the water source heat pump battery heating circuit, so that the water source heat pump battery heating circuit heats the battery. If the temperature of the passage in the passenger compartment meets the first heating demand and the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit, the step of using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual-harvesting heating can be continued.

[0108] Among them, the first heating demand is determined by the temperature required for heating the passenger compartment. For example, the first heating demand can be specifically the difference between the target channel temperature T1 and the channel temperature too low threshold T2. T1 and T2 can be calibrated at different external temperatures. Whether the temperature of the channel in the passenger compartment meets the first heating demand can be determined by whether the temperature T of the channel in the passenger compartment is greater than or equal to T1-T2. If not, it is determined that the temperature of the channel in the passenger compartment does not meet the first heating demand. If so, it is determined that the temperature of the channel in the passenger compartment meets the first heating demand. The temperature of the channel can be calculated by combining the temperature measured by the face blowing, window blowing, and foot blowing channel temperature sensors with the face blowing, foot blowing, and window blowing ratios, which can comprehensively reflect the channel intake temperature for heating the passenger compartment.

[0109] The above judgment on whether the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit can be specifically realized by judging whether Tp-Tp1 is less than or equal to the first temperature threshold, wherein Tp is the actual temperature of the PTC in the PTC heating water circuit, and Tp1 is the refrigerant temperature correction value of the inlet of the internal condenser in the air source heat pump heating circuit located in the passenger compartment of the vehicle, which can be obtained by sensor acquisition and post-processing, and the first temperature threshold can be set according to actual conditions, for example, it can be 5. If Tp-Tp1 is greater than the first temperature threshold, it is determined that the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, indicating that the heating capacity of the PTC heating water circuit is greater than the heating capacity of the air source heat pump heating circuit, and the dual-extraction heating using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit can be switched to dual-extraction heating using the water source heat pump battery heating circuit and the PTC heating water circuit, so as to avoid the problem of insufficient heating in the passenger compartment due to insufficient refrigerant in the vehicle thermal management system caused by the simultaneous operation of the air source heat pump heating circuit and the battery heating branch. If Tp-Tp1 is less than or equal to the first temperature threshold, it is determined that the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit, indicating that the heating capacity of the air source heat pump heating circuit is greater than the heating capacity of the PTC heating water circuit, and the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit can continue to be used for dual heating.

[0110] By switching the heat pump working mode as described above, the control algorithm and the heat pump heating circuit are optimized, so that the vehicle thermal management system can operate at the optimal heating capacity, improve the heating efficiency, take into account both energy consumption and heating capacity, and improve the air conditioning energy efficiency.

[0111] A vehicle thermal management system control method provided by an embodiment of the present invention switches from dual-source heating using an air source heat pump heating circuit, a water source heat pump battery heating circuit and a PTC heating water circuit to dual-source heating using a water source heat pump battery heating circuit and a PTC heating water circuit, which may include:

[0112] Switching from dual heating using air source heat pump heating circuit, water source heat pump battery heating circuit and PTC heating water circuit to heating the passenger compartment using air source heat pump heating circuit and PTC heating water circuit;

[0113] Determine whether the temperature of the passage in the passenger compartment meets the second heating demand and whether the temperature of the PTC heating water path meets the set conditions;

[0114] If so, the heating of the passenger compartment is switched from using the air source heat pump heating circuit and the PTC heating water circuit to using the PTC heating water circuit for heating the passenger compartment;

[0115] Switch from using the PTC heating water circuit to heat the passenger compartment to using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-source heating.

[0116] In an embodiment of the present invention, when switching from dual-harvesting heating using an air source heat pump heating circuit, a water source heat pump battery heating circuit and a PTC heating water circuit to dual-harvesting heating using a water source heat pump battery heating circuit and a PTC heating water circuit, the water source heat pump battery heating circuit can be temporarily closed first, that is, switching from dual-harvesting heating using an air source heat pump heating circuit, a water source heat pump battery heating circuit and a PTC heating water circuit to heating the passenger compartment using an air source heat pump heating circuit and a PTC heating water circuit, so as to ensure the heating effect of the passenger compartment, thereby improving the comfort in the vehicle, and reserving time for the PTC heating water circuit to increase the water temperature.

[0117] Then, it can be determined whether the temperature of the passenger compartment channel meets the second heating demand, and at the same time, it can be determined whether the temperature of the PTC heating water circuit meets the set conditions. Among them, the second heating demand is determined by the temperature required for heating the passenger compartment. For example, the second heating demand can be specifically the difference between the target channel temperature T1 and the channel temperature too high threshold value T3, and T3 can be calibrated at different external temperatures. Specifically, it can be determined whether the temperature of the passenger compartment channel meets the second heating demand by judging whether the channel T of the passenger compartment channel is greater than T1-T3. If T is greater than T1-T3, it is determined that the temperature of the passenger compartment meets the second heating demand, indicating that the channel temperature basically meets the heating demand. The specific implementation process of judging whether the temperature of the PTC heating water circuit meets the set conditions can be: judging whether the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit or whether the temperature of the PTC heating water circuit is close to the target temperature of the PTC heating water circuit. If the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit or the temperature of the PTC heating water circuit is close to the target temperature of the PTC heating water circuit, it is determined that the temperature of the PTC heating water circuit meets the set conditions; if the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit and the temperature of the PTC heating water circuit is not close to the target temperature of the PTC heating water circuit, it is determined that the temperature of the PTC heating water circuit does not meet the set conditions. Among them, judging whether the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit can be achieved by judging whether Tp is greater than Tp1. If Tp is greater than Tp1, the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, otherwise the temperature of the PTC heating water circuit is less than or equal to the temperature of the air source heat pump heating circuit. Whether the temperature of the PTC heating water circuit is close to the target temperature of the PTC heating water circuit can be determined by determining whether the difference between Tp2 and Tp (specifically, it can be the absolute value of the difference between the two, or it can be Tp2-Tp) is less than a second temperature threshold (specifically, it can be set according to actual conditions, for example, it can be 3), Tp2 is the target temperature of the PTC heating water circuit (that is, the temperature of the water PTC in the PTC heating water circuit), taking the second temperature threshold of 3 and Tp2-Tp as an example, if Tp2-Tp<3, it is determined that the temperature of the PTC heating water circuit is close to the target temperature of the PTC heating water circuit, and if Tp2-T≥3, it is determined that the temperature of the PTC heating water circuit is not close to the target temperature of the PTC heating water circuit.

[0118] If the temperature of the passage in the passenger compartment does not meet the second heating demand or the temperature of the PTC heating water circuit does not meet the set conditions, then in order to ensure the heating effect in the passenger compartment, the air source heat pump heating circuit and the PTC heating water circuit can continue to be used to heat the passenger compartment. If the temperature of the passage in the passenger compartment meets the second heating demand and the temperature of the PTC heating water circuit meets the set conditions, it means that the temperature of the passage basically meets the heating demand and the temperature of the PTC heating water circuit is relatively high, and the passenger compartment can be heated independently. At this time, in order to allow the water source heat pump battery heating circuit to have enough refrigerant for battery heating, it is possible to switch from using the air source heat pump heating circuit and the PTC heating water circuit to heat the passenger compartment to using the PTC heating water circuit to heat the passenger compartment, that is, the air source heat pump heating circuit can be closed and the PTC heating water circuit can be retained, wherein the time for the PTC heating water circuit to be opened separately can be set according to actual needs, etc. Afterwards, the water source heat pump battery heating circuit can be opened on the basis of retaining the PTC heating water circuit, so as to switch from using the PTC heating water circuit to heat the passenger compartment to using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-use heating, thereby meeting the dual-use heating needs of the passenger compartment and the battery.

[0119] By transitioning from turning on the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit to turning on the air source heat pump heating circuit and the PTC heating water circuit, then transitioning to the PTC heating water circuit, and finally transitioning to turning on the PTC heating water circuit and the water source heat pump battery heating circuit, time can be left for the PTC heating water circuit to increase its water temperature, thereby better heating the passenger compartment and providing heat for the water source heat pump battery heating circuit, and a smooth transition can be achieved, thereby improving the stability of the vehicle's thermal management system operation.

[0120] A vehicle thermal management system control method provided by an embodiment of the present invention may further include: if it is determined that the temperature of the passage in the passenger compartment does not meet the first heating requirement or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit:

[0121] Set the passenger compartment heating insufficient flag to be valid;

[0122] After receiving a dual heating request for passenger compartment heating and battery heating, it may also include:

[0123] Determine whether the passenger compartment heating shortage flag is valid;

[0124] If not, the step of performing dual heating using an air source heat pump heating circuit, a water source heat pump battery heating circuit, and a PTC heating water circuit is performed;

[0125] If so, dual-use heating is performed using the water source heat pump battery heating circuit and the PTC heating water circuit.

[0126] In an embodiment of the present invention, when judging whether the temperature of the passage in the passenger compartment meets the first heating requirement and whether the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit, if it is determined that the temperature of the passage in the passenger compartment does not meet the first heating requirement or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, the set passenger compartment heating shortage flag Flag can be set to valid, wherein the passenger compartment heating shortage flag can be set in advance and can be initially invalid. Specifically, 1 can be used to indicate that the passenger compartment heating shortage flag is valid, and a value other than 1 (such as 0) can be used to indicate that the passenger compartment heating shortage flag is invalid.

[0127] On the basis of setting the passenger compartment heating flag, when receiving a dual-exploitation heating request for passenger compartment heating and battery heating, it is possible to first determine whether the passenger compartment heating shortage flag is valid. If the passenger compartment heating shortage flag is invalid, the steps of using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual-exploitation heating can be executed. If the passenger compartment heating shortage flag is valid, it indicates that there is insufficient refrigerant in the vehicle thermal management system, the air source heat pump heating circuit cannot use enough refrigerant for passenger compartment heating, or that the PTC heating water circuit has sufficient capacity for passenger compartment heating. At this time, in order to ensure the heating effect of the refrigerant on the battery and to ensure the heating effect of the passenger compartment, the water source heat pump battery heating circuit and the PTC heating water circuit can be used for dual-exploitation heating.

[0128] Among them, when using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-source heating, the water source heat pump battery heating circuit and the PTC heating water circuit can be directly used for dual-source heating, or the air source heat pump heating circuit and the PTC heating water circuit can be used to heat the passenger compartment first, and then, the heating of the passenger compartment using the air source heat pump heating circuit and the PTC heating water circuit can be switched to the heating of the passenger compartment using the PTC heating water circuit, and then, the heating of the passenger compartment using the PTC heating water circuit can be switched to the heating of the passenger compartment using the water source heat pump battery heating circuit and the PTC heating water circuit. For the specific implementation process, please refer to the above-mentioned relevant description.

[0129] From the above, it can be seen that when performing double-cut heating, it is only necessary to enter the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for double-cut heating once to avoid affecting the double-cut heating and improve the stability of the double-cut heating.

[0130] The present invention also provides a vehicle thermal management system. Figure 5, which shows a schematic diagram of the structure of a vehicle thermal management system provided by an embodiment of the present invention, wherein any of the above-mentioned vehicle thermal management system control methods is used to control the vehicle thermal management system, and the vehicle thermal management system may include an air source heat pump heating circuit 1, a battery heating branch 2 and a connecting branch 3, wherein:

[0131] An air source heat pump heating circuit 1, for heating a passenger compartment in a vehicle;

[0132] A battery heating branch 2, used for heating the battery in the vehicle;

[0133] The connecting branch 3 is used to connect the air source heat pump heating circuit 1 and the battery heating branch 2.

[0134] The vehicle thermal management system provided in the embodiment of the present invention is controlled by any of the above-mentioned vehicle thermal management system control methods, and the vehicle thermal management system may include an air source heat pump heating circuit 1, a battery heating branch 2 and a connecting branch 3, wherein the air source heat pump heating circuit 1 is used to heat the passenger compartment in the vehicle, the battery heating branch 2 is used to heat the battery in the vehicle, and the connecting branch 3 is used to connect the air source heat pump heating circuit 1 and the battery heating branch 2, so that when the vehicle thermal management system is switched to the air source heat pump heating circuit 1 and refrigerant is stored in the battery heating branch 2, it can be opened to transport the refrigerant in the battery heating branch 2 to the air source heat pump heating circuit 1. For details, please refer to the detailed description of the above-mentioned relevant parts, which will not be repeated here.

[0135] A vehicle thermal management system provided by an embodiment of the present invention may include a direct cooling plate 101, a first control valve 102 connected to a first end of the direct cooling plate 101 and a first branch 31 in a connecting branch 3, a compressor 103, an inner condenser 104 and a second control valve 105 connected to an outlet end of the compressor 103, a third control valve 106 connected to the inner condenser 104, a liquid storage drying tank 107 connected to the third control valve 106, a coaxial tube 108 connected between a first pipeline and the liquid storage drying tank 107, a fourth control valve 109 connected to a first pipeline of the coaxial tube 108 and the first branch 31 in the connecting branch 3, an external heat exchanger 110 connected to the fourth control valve 109, a first check valve 111 connected between the liquid storage drying tank 107 and the external heat exchanger 110, a fifth control valve 112 connected to the external heat exchanger 110, and a fifth control valve 112 connected to the fifth control valve 112 and the coaxial tube 108. 8, a second one-way valve 113 connected to the second pipeline of the direct cooling plate 101, a throttle hole 114 connected to the second control valve 105, a first temperature and pressure sensor 115 connected to the throttle hole 114 and the second end of the direct cooling plate 101, a sixth control valve 116 connected to the first control valve 102, a waste heat plate exchanger 117 connected to the sixth control valve 116 and the inlet end of the compressor 103, a seventh control valve 118 connected to the second branch 32 in the connecting branch 3 and the first pipeline in the coaxial tube 108, a water pump 119 connected to the waste heat plate exchanger 117, a water PTC 120 connected to the water pump 119 and the waste heat plate exchanger 117, the second branch 32 is connected to the first temperature and pressure sensor 115 and the second pipeline in the coaxial tube 108, the second pipeline in the coaxial tube 108 is connected to the inlet end of the compressor 103, and the superheat of the direct cooling plate 101 is calculated by the temperature and pressure measured by the first temperature and pressure sensor 115;

[0136] The air source heat pump heating circuit 1 may include a compressor 103, an internal condenser 104, a third control valve 106, a liquid storage drying tank 107, a fourth control valve 109, an external heat exchanger 110, a fifth control valve 112 and a second check valve 113;

[0137] The battery heating branch 2 may include a second control valve 105, a throttle hole 114, a direct cooling plate 101, a first control valve 102, a sixth control valve 116, a waste heat plate exchanger 117, a water pump 119 and a water PTC 120; wherein the compressor 103, the second control valve 105, the throttle hole 114, the first temperature and pressure sensor 115, the direct cooling plate 101, the first control valve 102, the sixth control valve 116 and the waste heat plate exchanger 117 form a water source heat pump battery heating circuit in the battery heating branch 2, and the waste heat plate exchanger 117, the water pump 119 and the water PTC 120 form a PTC heating water circuit in the battery heating branch 2.

[0138] In an embodiment of the present invention, the connecting branch 3 in the vehicle thermal management system may specifically include a first branch 31 and a second branch 32, and the vehicle thermal management system may specifically include a direct cooling plate 101, a first control valve 102 connected to the first end of the direct cooling plate 101 and the first branch 31 in the connecting branch 3, a compressor 103, an internal condenser 104, a second control valve 105, a third control valve 106, a liquid storage drying tank 107, a coaxial tube 108 including a first pipeline and a second pipeline, a fourth control valve 109, an external heat exchanger 110, a first check valve 111, a fifth control valve 112, a second check valve 113, a throttle hole 114, a first temperature and pressure sensor 115, a sixth control valve 116, a waste heat plate exchanger 117, a seventh control valve 118, a water pump 119, and a water PTC 120. The outlet end of the compressor 103 is connected to the inner condenser 104 and the second control valve 105 respectively, the inner condenser 104 is connected to the third control valve 106, the third control valve 106 is connected to the liquid storage drying tank 107, the liquid storage drying tank 107 is connected to the first pipeline in the coaxial tube 108, the first pipeline in the coaxial tube 108 is connected to the first branch 31 in the connecting branch 3 and the fourth control valve 109, the fourth control valve 109 is connected to the external heat exchanger 110, the external heat exchanger 110 is connected to the fifth control valve 112, the fifth control valve 112 is connected to the second check valve 113, the second check valve 113 is connected to the second pipeline in the coaxial tube 108, the second pipeline in the coaxial tube 108 is connected to the inlet end of the compressor 103, the first check valve 111 is connected to the liquid storage drying tank 107 and Between the external heat exchanger 110, the throttle hole 114 is connected to the second control valve 105, the first temperature and pressure sensor 115 is connected to the throttle hole 114 and the second end of the direct cooling plate 101, the throttle hole 114 and the first temperature and pressure sensor 115 are also connected to the second branch 32 in the connecting branch 3, the first end of the direct cooling plate 101 is connected to the sixth control valve 116, the sixth control valve 116 is connected to the waste heat plate exchanger 117, the waste heat plate exchanger 117 is also respectively connected to the second branch 32 in the pipeline branch, the water PTC 120, the water pump 119 and the inlet end of the compressor 103, the second branch 32 in the connecting branch 3 is also connected to the second pipeline in the coaxial tube 108, and the seventh control valve 118 is connected between the second branch 32 in the connecting branch 3 and the first pipeline in the coaxial tube 108.

[0139] Among them, the first control valve 102 to the seventh control valve 118 can all be solenoid valves or electronic expansion valves, etc., and the embodiment of the present invention is described by taking the first control valve 102, the fourth control valve 109, and the seventh control valve 118 as electronic expansion valves, and the second control valve 105, the third control valve 106, the fifth control valve 112, and the sixth control valve 116 as solenoid valves. Moreover, when the control valve is specifically an electronic expansion valve and needs to be opened, the opening ratio of the electronic expansion valve can be set, wherein the opening ratio range of the electronic expansion valve is 0-100%, and the full opening degree can be 576. When the control valve is a solenoid valve, the opening degree of the solenoid valve can be 100%.

[0140] On the basis of the above, the air source heat pump heating circuit 1 may include a compressor 103, an inner condenser 104, a third control valve 106, a liquid storage drying tank 107, a fourth control valve 109, an outer heat exchanger 110, a fifth control valve 112 and a second check valve 113, and its circuit form is specifically: compressor 103-inner condenser 104-third control valve 106-liquid storage drying tank 107-first pipeline in the coaxial tube 108-fourth control valve 109-outer heat exchanger 110-fifth control valve 112-second check valve 113-compressor 103, using compressor 103 to compress and then return to compressor 103 through the above circuit to compress, and using the outer heat exchanger 110 to absorb external heat to heat the passenger compartment through the inner condenser 104. That is, the air source heat pump heating circuit 1 can correspond to an air source heat pump heating working mode (which can be recorded as working mode 1).

[0141] The battery heating branch 2 may include a compressor 103, a second control valve 105, a throttle hole 114, a direct cooling plate 101, a first control valve 102, a sixth control valve 116, a waste heat plate exchanger 117, a water pump 119 and a water PTC 120. The water source heat pump battery heating circuit in the battery heating branch 2 includes a compressor 103, a second control valve 105, a throttle hole 114, a direct cooling plate 101, a first control valve 102, a sixth control valve 116, a waste heat plate exchanger 117, a water pump 119 and a water PTC 120; the compressor 103, the second control valve 105, the throttle hole 114, the first temperature and pressure sensor 115, the direct cooling plate 101, the first control valve 102, the sixth control valve 116 and the waste heat plate exchanger 117, and the PTC heating water circuit in the battery heating branch 2 includes a waste heat plate exchanger 117, a water pump 119 and a water PTC 120. The specific form of the water source heat pump battery heating circuit is compressor 103-second control valve 105-throttle hole 114-first temperature and pressure sensor 115-direct cooling plate 101-first control valve 102-sixth control valve 116-waste heat plate exchanger 117-second pipeline in coaxial tube 108-compressor 103, which is compressed by compressor 103 and then returned to the injection molding machine through the aforementioned circuit for compression. Specifically, the high-temperature and high-pressure refrigerant compressed by compressor 103 is used to heat the battery through the direct cooling plate 101 (that is, the battery heating branch 2 corresponds to the water source heat pump battery heating working mode (which can be recorded as working mode 2)), and the heat source comes from the PTC heating water circuit. The PTC heating water circuit is also a circuit, and its circuit form is: waste heat plate exchanger 117-water pump 119-water PTC120-waste heat plate exchanger 117.

[0142] On the basis of the above, the opening and closing of the corresponding circuits (air source heat pump heating circuit 1, water source heat pump battery heating circuit) can be realized by controlling the opening and closing of the corresponding control valves in the vehicle thermal management system, and the opening and closing of the PTC heating water circuit can be realized by opening and closing the water PTC 120. Moreover, on the basis of the above, when it is necessary to use the battery heating branch 2 to perform refrigerant replenishment operation for the air source heat pump heating circuit 1, the first branch 31 and the second branch 32 in the connecting branch 3 can be opened, and the first control valve 102 can be opened. At this time, on the basis of the opening of the air source heat pump heating circuit 1, the refrigerant replenishment circuit is: compressor 103-internal condenser 104-third control valve 106-first pipeline in the coaxial tube 108-first branch 31 in the connecting branch 3-first control valve 102-direct cooling plate 101-first temperature and pressure sensor 115-second branch 32 in the connecting branch 3-second pipeline in the coaxial tube 108-compressor 103. When the pressure in the air source heat pump heating circuit 1 is greater than the first pressure threshold, the first branch 31 in the connecting branch 3 and the first control valve 102 connected to the first branch 31 and the first end of the direct cooling plate 101 can be opened again, and the first branch 31 in the connecting branch 3 and the first control valve 102 can be closed when the pressure in the air source heat pump heating circuit 1 is not greater than the second pressure threshold.

[0143] In addition, the vehicle thermal management system may further include a first pressure sensor 128 located between the internal condenser 104 and the third control valve 106 for measuring the pressure in the air source heat pump heating loop 1 .

[0144] A vehicle thermal management system provided by an embodiment of the present invention may further include a heater core 121, which is connected between the waste heat plate exchanger 117 and the water PTC 120; wherein the heater core 121 is closed when the PTC heating water circuit only supplies heat source to the water source heat pump battery heating circuit.

[0145] In an embodiment of the present invention, the vehicle thermal management system may further include a heater core 121, which is connected between the waste heat plate exchanger 117 and the water PTC 120, that is, included in the PTC heating water circuit. When the PTC heating water circuit only supplies heat source to the water source heat pump battery heating circuit and does not need to heat the passenger compartment, the heater core 121 is closed. On the basis of the above, when a dual-use heating request is received, the corresponding method of dual-use heating can be adopted by opening and closing the corresponding valve. For details, please refer to Figure 6, which shows a control flow chart of the control valves in the vehicle thermal management system during dual-source heating provided by an embodiment of the present invention. When a dual-source heating request is received, the second control valve 105, the first control valve 102 and the sixth control valve 116 can be opened to open the water source heat pump battery heating circuit, and the third control valve 106, the fourth control valve 109 and the fifth control valve 112 can be opened to open the air source heat pump heating circuit 1, and the PTC heating water circuit can be opened. Among them, when the first control valve 102 and the fourth control valve 109 are electronic expansion valves and need to be opened, the opening ratio can be obtained by PID control calculation based on the difference between the actual supercooling degree and the target supercooling degree. In the dual-source heating process, when it is necessary to switch from dual-source heating using the air source heat pump heating circuit 1, the water source heat pump battery heating circuit and the PTC heating water circuit to heating the passenger compartment using the air source heat pump heating circuit 1 and the PTC heating water circuit, the third control valve 106, the fourth control valve 109 and the fifth control valve 112 can be opened, and the PTC heating water circuit can be opened. When it is necessary to switch from heating the passenger compartment using the air source heat pump heating circuit 1 and the PTC heating water circuit to heating the passenger compartment using the PTC heating water circuit, the PTC heating water circuit can be opened. When it is necessary to switch from heating the passenger compartment using the PTC heating water circuit to dual-source heating using the water source heat pump battery heating circuit and the PTC heating water circuit, the second control valve 105, the first control valve 102 and the sixth control valve 116 can be opened, and the PTC heating water circuit can be opened. For the specific description of the above part, please refer to the description of the relevant part in the above-mentioned vehicle thermal management system control method, which will not be repeated here.

[0146] An embodiment of the present invention provides a vehicle thermal management system, which may further include a four-way valve 122 connected between the waste heat plate exchanger 117 and the water pump 119 , and an engine 123 connected to the four-way valve 122 .

[0147] In the embodiment of the present invention, the vehicle thermal management system may further include a four-way valve 122 and an engine 123, wherein two ports of the four-way valve 122 are respectively connected to the waste heat exchanger 117 and the water pump 119, and the other two ports are connected to the engine 123. That is, the vehicle thermal management system provided by the embodiment of the present invention may be a vehicle thermal management system in a hybrid vehicle. Figure 5 As shown, the A port of the four-way valve 122 is connected to the waste heat plate exchanger 117 , the B port is connected to the engine 123 , the C port is connected to the engine 123 , and the D port is connected to the water pump 119 .

[0148] On the basis of the above, the PTC heating water circuit is: waste heat exchanger 117-four-way valve 122 (specifically, port A and port D of the four-way valve 122)-water pump 119-water PTC 120-heat core 121-waste heat exchanger 117, that is, in this case, the connection mode of the four-way valve 122 is port A-port D, port B-port C. In addition to the heat source supply of the PTC heating water circuit, the water source heat list battery heating circuit can also be supplied with heat source when the four-way valve 122 adopts the connection mode of port A-port B, port C-port D. At this time, the circuit form is waste heat exchanger 117-four-way valve 122-engine 123-water pump 119-water PTC 120-heat core 121-waste heat exchanger 117.

[0149] In a vehicle thermal management system provided by an embodiment of the present invention, the first branch 31 may include an eighth control valve 124 connected to the first control valve 102 and the fourth control valve 109, the second branch 32 may include a ninth control valve 125 connected to the throttle hole 114 and the second end of the direct cooling plate 101, and a third one-way valve 126 connected to the ninth control valve 125 and the second pipeline of the coaxial tube 108;

[0150] The vehicle thermal management system may further include a first pressure sensor 128 connected between the internal condenser 104 and the third control valve 106 .

[0151] In the embodiment of the present invention, the first branch 31 included in the connecting branch 3 may specifically include an eighth control valve 124 connected to the first control valve 102, the first pipeline of the coaxial tube 108 and the fourth control valve 109. The second branch 32 included in the connecting branch 3 may specifically include a ninth control valve 125 connected to the throttle hole 114 and the first temperature and pressure sensor 115, and a third one-way valve 126 connected to the ninth control valve 125, the waste heat plate exchanger 117, the seventh control valve 118 and the second pipeline in the coaxial tube 108. Among them, the eighth control valve 124 and the ninth control valve 125 can both be solenoid valves. Among them, the vehicle thermal management system can also include a tenth control valve 127 connected in parallel with the eighth control valve 124, the tenth control valve 127 can be included in the first branch 31, or it can be not included in the first branch 31, and the tenth control valve 127 can specifically be an electronic expansion valve.

[0152] In addition, the vehicle thermal management system may also include a first pressure sensor 128 connected between the internal condenser 104 and the third control valve 106, which is used to detect the pressure in the air source heat pump heating circuit 1. Thereafter, the pressure detected by the first pressure sensor 128 can be processed to obtain the pressure in the air source heat pump heating circuit 1 (that is, the high pressure pressure in the circuit).

[0153] That is, in the embodiment of the present invention, a control valve can be used to form a connecting branch 3, so that the water source heat pump battery heating circuit can be used to supply heat source to the air source heat pump heating circuit 1 by controlling the opening and closing of the corresponding control valve in the connecting branch 3. Figure 7 , which shows a control flow chart of the corresponding control valves when performing refrigerant supplementation operation for the air source heat pump heating circuit provided by an embodiment of the present invention. First, the condition for entering the refrigerant supplementation operation is: the air source heat pump heating circuit 1 is switched and refrigerant is stored in the battery heating branch 2. If this condition is met, the eighth control valve 124, the first control valve 102 and the ninth control valve 125 are opened. When the first control valve 102 is an electronic expansion valve, the eighth control valve 124 and the ninth control valve 125 are both solenoid valves, the opening of the eighth control valve 124 and the ninth control valve 125 can be controlled to be 100%, and the opening ratio of the first control valve 102 can be 30% (full opening: 576), so as to use the battery heating branch 2 to supplement the refrigerant for the air source heat pump heating circuit 1. When the opening time of the eighth control valve 124, the first control valve 102 and the ninth control valve 125 reaches a preset time (such as 20 seconds), the eighth control valve 124, the first control valve 102 and the ninth control valve 125 are closed. Since the amount of refrigerant in the air source heat pump heating circuit 1 increases after the refrigerant is supplemented, its pressure will also increase. Therefore, it can be determined whether the pressure P (specifically the high pressure in the circuit) of the air source heat pump heating circuit 1 is greater than or equal to the first pressure threshold P1. If P≥P1, the eighth control valve 124 and the first control valve 102 are opened to enter the refrigerant supplement pressure reduction control. At this time, the opening of the ninth control valve 125 is 0. When the eighth control valve 124 is a solenoid valve and the first control valve 102 is an electronic expansion valve, the opening of the eighth control valve 124 is 100%, and the opening ratio of the first control valve 102 is 30% (full opening is 576) to return the excess refrigerant to the battery heating branch 2 until P≤P2 (the second pressure threshold), and then the eighth control valve 124 and the first control valve 102 are closed, and the air source heat pump heating circuit 1 operates normally.

[0154] In addition, the vehicle thermal management system may also include sensors, other control valves, an evaporator 137, etc. For example, the vehicle thermal management system may also include a first temperature sensor 129 connected to the compressor 103, the internal condenser 104 and the second control valve 105, a second temperature sensor 130 connected between the internal condenser 104 and the first pressure sensor 128, an eleventh control valve 131 (specifically, a solenoid valve) connected to the first pressure sensor 128, the third control valve 106, the fifth control valve 112 and the external heat exchanger 110, and a third temperature sensor connected to the second pipeline in the coaxial tube 108. 132, a second pressure sensor 133 connected to the third temperature sensor 132 and the compressor 103, a second temperature and pressure sensor 134 connected between the direct cooling plate 101 and the first control valve 102, a third temperature and pressure sensor 135 connected between the waste heat plate exchanger 117, the third one-way valve 126, the seventh control valve 118 and the second pipeline in the coaxial tube 108, a fourth temperature and pressure sensor 136 connected to the third one-way valve 126, the third temperature and pressure sensor 135 and the seventh control valve 118, and an evaporator 137 connected between the fourth temperature and pressure sensor 136 and the seventh control valve 118.

[0155] From the above, it can be seen that the vehicle thermal management system provided by the present invention can include working mode 1: air source heat pump heating; working mode 2: water source heat pump battery heating; working mode 3 (waste heat plate exchanger 117-four-way valve 122-water pump 119-water PTC120-warm air core 121-waste heat plate exchanger 117): PTC heating water circuit; working mode 4: air source heat pump heating + PTC heating water circuit (ie working mode 1 + working mode 3); working mode 5: water source heat pump battery heating + PTC heating water circuit (ie working mode 2 + working mode 3); working mode 6: air source heat pump heating + water source heat pump battery heating + PTC heating water circuit (ie working mode 1 + working mode 2 + working mode 3). Of course, the vehicle thermal management system provided by the present invention can also realize other working modes.

[0156] An embodiment of the present invention further provides a vehicle, which may include any of the above-mentioned vehicle thermal management systems, and the vehicle is used to implement the steps of any of the above-mentioned vehicle thermal management system control methods.

[0157] For the description of a vehicle thermal management system and related parts in a vehicle provided by an embodiment of the present invention, reference can be made to the description of related parts in a vehicle thermal management system control method provided by an embodiment of the present invention, which will not be repeated here.

[0158] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then storing it in a computer memory.

[0159] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0160] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0161] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0162] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0163] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A vehicle thermal management system control method, characterized in that: Applied to a vehicle thermal management system, the vehicle thermal management system includes an air source heat pump heating circuit for heating a passenger compartment in a vehicle, a battery heating branch for heating a battery in the vehicle, and a connecting branch for connecting the air source heat pump heating circuit and the battery heating branch. The vehicle thermal management system control method includes: Determining whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit; If so, the connecting branch is opened to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit.

2. The vehicle thermal management system control method according to claim 1, characterized in that: After the connecting branch is opened to introduce the refrigerant in the battery heating branch into the air source heat pump heating circuit, the method further includes: When the opening time of the connecting branch reaches a preset time, the connecting branch is closed.

3. The vehicle thermal management system control method according to claim 2, characterized in that: The battery heating branch includes a direct cooling plate, a first control valve connected to the direct cooling plate and the connecting branch, the connecting branch includes a first branch located at a first end of the direct cooling plate and connected to the first control valve and the air source heat pump heating circuit, and a second branch located at a second end of the direct cooling plate and connected to the direct cooling plate and the air source heat pump heating circuit. When the connecting branch is opened, it also includes: The first control valve is opened, and when the opening time of the first control valve reaches the preset time, the first control valve is closed.

4. The vehicle thermal management system control method according to claim 3, characterized in that: After closing the connecting branch and the first control valve, the method further includes: Determining whether the pressure in the air source heat pump heating circuit is greater than or equal to a first pressure threshold; If the pressure in the air source heat pump heating circuit is greater than or equal to the first pressure threshold, the first branch and the first control valve are opened to transport the refrigerant in the air source heat pump heating circuit to the direct cooling plate; Determine whether the pressure in the air source heat pump heating circuit is less than or equal to a second pressure threshold; the second pressure threshold is less than the first pressure threshold; If the pressure in the air source heat pump heating circuit is greater than the second pressure threshold, keeping the first branch and the first control valve open; If the pressure of the air source heat pump heating circuit is less than or equal to the second pressure threshold, the first branch and the first control valve are closed.

5. The vehicle thermal management system control method according to claim 3, characterized in that: When judging whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it also includes: Determining whether the battery heating branch has refrigerant stored; If the vehicle thermal management system is switched to the air source heat pump heating working mode and the battery heating branch stores refrigerant, the step of opening the connecting branch to transport the refrigerant in the battery heating branch to the air source heat pump heating circuit is performed.

6. The vehicle thermal management system control method according to claim 5, characterized in that: Determining whether the battery heating branch has refrigerant stored therein includes: Obtaining the overheat of the direct cooling plate in the battery heating branch, and determining whether the overheat of the direct cooling plate is less than an overheat threshold; If so, it is determined that refrigerant is stored in the battery heating branch.

7. The vehicle thermal management system control method according to claim 1, characterized in that: The battery heating branch includes a water source heat pump battery heating circuit and a PTC heating water circuit for supplying heat source to the water source heat pump battery heating circuit, the PTC heating water circuit includes a heater core, and the heater core is closed when the PTC heating water circuit only supplies heat source to the water source heat pump battery heating circuit. Before determining whether the vehicle thermal management system is switched to the air source heat pump heating working mode corresponding to the air source heat pump heating circuit, it also includes: determining whether a dual heating request for passenger compartment heating and battery heating is received; If so, dual heating is performed using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit; wherein the air source heat pump heating circuit and the PTC heating water circuit are used to heat the passenger compartment, and the water source heat pump battery heating circuit and the PTC heating water circuit are used to heat the battery.

8. The vehicle thermal management system control method according to claim 7, characterized in that: When the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit are used for dual heating, it also includes: Determining whether the temperature of the passenger compartment passage meets the first heating requirement and whether the temperature of the PTC heating water circuit is not greater than the temperature of the air source heat pump heating circuit; If the temperature of the passage in the passenger compartment does not meet the first heating demand or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, the dual heating using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit is switched to dual heating using the water source heat pump battery heating circuit and the PTC heating water circuit; wherein the PTC heating water circuit is used to heat the passenger compartment and to provide a heat source for the water source heat pump battery heating circuit, and the water source heat pump battery heating circuit is used to heat the battery.

9. The vehicle thermal management system control method according to claim 8, characterized in that: Switching from using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual-harvesting heating to using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-harvesting heating includes: Switching from using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit for dual heating to using the air source heat pump heating circuit and the PTC heating water circuit to heat the passenger compartment; Determining whether the temperature of the passenger compartment passage meets the second heating requirement and whether the temperature of the PTC heating water path meets the set condition; If yes, switching from using the air source heat pump heating circuit and the PTC heating water circuit to heat the passenger compartment to using the PTC heating water circuit to heat the passenger compartment; Switch from using the PTC heating water circuit to heat the passenger compartment to using the water source heat pump battery heating circuit and the PTC heating water circuit for dual-source heating.

10. The vehicle thermal management system control method according to claim 8, characterized in that: If it is determined that the temperature of the passenger compartment passage does not meet the first heating requirement or the temperature of the PTC heating water circuit is greater than the temperature of the air source heat pump heating circuit, the method further includes: Set the passenger compartment heating insufficient flag to be valid; Upon receiving a dual heating request for cabin heating and battery heating, it also includes: Determining whether the passenger compartment heating deficiency flag is valid; If not, the step of performing dual heating using the air source heat pump heating circuit, the water source heat pump battery heating circuit and the PTC heating water circuit is performed; If so, the water source heat pump battery heating circuit and the PTC heating water circuit are used for dual-use heating.

11. A vehicle thermal management system, characterized in that: The vehicle thermal management system control method according to any one of claims 1 to 10 is used to control the vehicle thermal management system, wherein the vehicle thermal management system includes an air source heat pump heating circuit, a battery heating branch and a connecting branch, wherein: The air source heat pump heating circuit is used to heat the passenger compartment in the vehicle; The battery heating branch is used to heat the battery in the vehicle; The connecting branch is used to connect the air source heat pump heating circuit and the battery heating branch.

12. A vehicle, characterized in that: The vehicle comprises the vehicle thermal management system according to claim 11, wherein the vehicle is used to implement the steps of the vehicle thermal management system control method according to any one of claims 1 to 10.

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