Thermal management system architecture based on fourteen-way valve and control method thereof

Abstract

The invention discloses a thermal management system architecture based on a fourteen-way valve and a control method of the thermal management system architecture, and relates to a vehicle thermal management system.The thermal management system architecture comprises an air conditioner loop, a battery loop, an electric drive loop and a warm air loop; the air conditioner loop, the battery loop, the electric drive loop and the warm air loop are communicated with one another through a fourteen-way valve; the air conditioner loop comprises at least two heat exchange pieces. Two different valve ports can be communicated through different liquid channels through the fourteen-way valve, so that the battery loop, the electric drive loop and the warm air loop can be conducted according to a target working mode and conduct heat exchange with the air conditioner loop at the position of the heat exchange piece, and energy flow of the heat management system is controlled. According to the architecture, on the basis of meeting reasonable flow of energy among thermal management systems, the overall thermal management architecture is greatly simplified, and the design cost is saved.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of vehicle thermal management systems, and more particularly to a thermal management system architecture based on a fourteen-way valve and a control method thereof. Background Art

[0002] The energy consumption of electric vehicles directly affects the vehicle's range. Among them, the vehicle's thermal management system has a huge impact on the vehicle's energy consumption. For example, passenger compartment heating and power battery heating at low temperatures will consume more power batteries and reduce vehicle range.

[0003] In order to reduce the energy consumption of the thermal management system, electric vehicles currently mostly use an integrated thermal management system with a heat pump system. Compared with the traditional passenger compartment electric heating solution, the heat pump system can reduce the energy consumption of passenger compartment heating, and the integrated solution integrates the vehicle's electric drive cooling system, power battery temperature control system, and air conditioning system, which can connect the various systems to achieve the flow of heat between systems.

[0004] However, in order to achieve the problem of reasonable heat flow, this integrated thermal management system with a heat pump system usually requires complex circuit connectivity. For example, multiple water valves or expansion valves need to be installed, which greatly affects the cost and complexity of the entire thermal management system. For this reason, we propose a thermal management system architecture with fourteen-way valves. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a thermal management system architecture based on a fourteen-way valve and a control method thereof.

[0006] In a first aspect, the present application provides a thermal management system architecture based on a fourteen-way valve, the thermal management system architecture comprising at least: an air conditioning circuit, a battery circuit, an electric drive circuit, and a heating circuit; The air conditioning circuit, battery circuit, electric drive circuit and heating circuit are interconnected through a 14-way valve; wherein the air conditioning circuit includes at least two heat exchange components; The fourteen-way valve has fourteen valve ports, and every two valve ports of the fourteen-way valve are connected to a circuit; a rotatable valve core is arranged inside the fourteen-way valve, and a plurality of independently arranged liquid channels are formed inside the valve core; When the valve core rotates, different fluid paths are connected to two different valve ports, and the battery circuit, electric drive circuit and warm air circuit can be conducted according to the target working mode, and heat can be exchanged with the air-conditioning circuit at the heat exchange element to control the energy flow of the thermal management system.

[0007] According to the technical solution provided by the present application, the fourteen valve ports of the fourteen-way valve sequentially form the first port to the fourteenth port; Among them, the battery circuit is connected to the first port and the eighth port respectively; the electric drive circuit is connected to the fifth port and the twelfth port respectively; and the warm air circuit is connected to the sixth port and the seventh port respectively.

[0008] According to the technical solution provided by the present application, the two heat exchangers in the air conditioning circuit are respectively a heater core and a cooler, and in the air conditioning circuit, a compressor, the heater core, the cooler and a gas-liquid separator are sequentially connected to form a circulation flow path; The heater core has a first heat exchange channel and a second heat exchange channel; the cooler has a third heat exchange channel and a fourth heat exchange channel; The output end of the compressor is connected to one end of the first heat exchange channel, the other end of the first heat exchange channel is connected to the third heat exchange channel, and the other end of the third heat exchange channel is connected to the input end of the gas-liquid separator.

[0009] According to the technical solution provided in the present application, the air conditioning circuit further includes: a first branch circuit connected in parallel on both sides of the cooler; A first electronic expansion valve is provided between the heater core and the cooler, one end of the first branch circuit is connected between the first electronic expansion valve and the heater core, and the other end thereof is connected to the input end of the gas-liquid separator; The first branch circuit is provided with a second electronic expansion valve and an evaporator in sequence.

[0010] According to the technical solution provided in this application, the battery circuit at least includes a power battery; The electric drive circuit at least includes: an electric drive water pump, a power supply assembly and an electric drive assembly; wherein the output end of the electric drive water pump is connected to the power supply assembly, and the input end thereof is connected to the fifth port; one end of the electric drive assembly is connected to the power supply assembly, and the other end is connected to the twelfth port; The warm air circuit at least includes: a warm air water pump, a condenser and the warm air core in the air-conditioning circuit; wherein the output end of the warm air water pump is connected to the condenser, and its input end is connected to the seventh port; the output end of the condenser is connected to the input end of the second heat exchange channel, and the output end of the second heat exchange channel is connected to the sixth port.

[0011] According to the technical solution provided in this application, the thermal management system architecture further includes: a circulating water loop, a heat dissipation loop, a first auxiliary branch and a second auxiliary branch; The two ends of the circulating water loop are connected to the second port and the ninth port respectively; the two ends of the heat dissipation loop are connected to the fourth port and the eleventh port respectively; the two ends of the first auxiliary branch are connected to the third port and the tenth port respectively; the two ends of the second auxiliary branch are connected to the thirteenth port and the fourteenth port respectively; wherein, the first auxiliary branch is connected to the two ends of the fourth heat exchange channel.

[0012] According to the technical solution provided by the present application, the circulating water loop at least includes: a circulating water pump; The output end of the circulating water pump is connected to the second port, and the input end thereof is connected to the ninth port; The heat dissipation circuit at least includes: a radiator.

[0013] According to the technical solution provided in this application, the fourteen-way valve has multiple working states; In one working state, the first port is connected to the second port; the third port is connected to the fourth port; the fifth port is connected to the fourteenth port; the sixth port is connected to the seventh port; the eighth port is connected to the eleventh port; the ninth port is connected to the tenth port; the twelfth port is connected to the thirteenth port; The warm air circuit and the air conditioning circuit perform heat exchange at the warm air core, the electric drive circuit and the second auxiliary branch form a circulating liquid circuit, the battery circuit, the circulating water circuit, the heat dissipation circuit and the first auxiliary branch form a circulating liquid circuit, and perform heat exchange at the cooler.

[0014] In a second aspect, the present application provides a control method for a thermal management system architecture based on a fourteen-way valve. Based on the above-mentioned thermal management system architecture based on a fourteen-way valve, the control method includes: Acquire a first temperature control requirement of a thermal management system of a target vehicle and a plurality of operating condition parameters of the thermal management system at present; the first temperature control requirement at least includes: a cooling requirement and a heating requirement of an electric drive module, a battery module and a passenger compartment; the plurality of operating condition parameters at least include: a driving condition, an environmental condition, a battery operating condition and an electric drive operating condition; Based on the first temperature control requirement and multiple operating parameters of the current thermal management system, determining a target operating mode of the thermal management system; According to the port connection status of the fourteen-way valve in the target working mode, the valve core in the fourteen-way valve is controlled to rotate to a corresponding angle to achieve the connection of the corresponding ports.

[0015] According to the technical solution provided by this application, the control method also includes: Determine whether the air conditioning circuit needs to be filled with refrigerant. If so, select the refrigerant filling mode in the thermal management system, and control the valve core in the fourteen-way valve to rotate according to the port connection status corresponding to the refrigerant filling mode.

[0016] To summarize, the present technical solution specifically discloses a thermal management system architecture based on a fourteen-way valve and a control method thereof, wherein the thermal management system architecture includes: an air-conditioning circuit, a battery circuit, an electric drive circuit and a warm air circuit; the air-conditioning circuit, the battery circuit, the electric drive circuit and the warm air circuit are interconnected through a fourteen-way valve; wherein the air-conditioning circuit includes at least two heat exchange components; the fourteen-way valve has fourteen valve ports, and every two valve ports of the fourteen-way valve are connected to a circuit; a rotatable valve core is arranged inside the fourteen-way valve, and a plurality of independently arranged liquid channels are formed inside the valve core; when the valve core rotates, different liquid channels are connected to two different valve ports, and the battery circuit, the electric drive circuit and the warm air circuit can be conducted according to the target working mode, and heat exchange is performed with the air-conditioning circuit at the heat exchange component to control the energy flow of the thermal management system.

[0017] In order to achieve the problem of reasonable heat flow, the existing integrated thermal management systems with heat pump systems mostly require complex circuit connections, which have a certain impact on the cost and complexity of the entire thermal management system. In the present application, the air-conditioning circuit, battery circuit, electric drive circuit and heater circuit are interconnected through a fourteen-way valve, so that the structure of each circuit is simplified and the overall complexity of the thermal management system architecture is reduced; by connecting different valve ports, the corresponding circuits can be connected without setting up too many pipelines or valve body structures, and multiple circuits can also achieve heat exchange with the air-conditioning circuit at the heat exchanger, thereby optimizing the flow of energy between thermal management systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 This is a schematic diagram of the first interconnected working condition of the thermal management system architecture based on the fourteen-way valve.

[0019] Figure 2 Schematic diagram of the second interconnection working condition of the thermal management system architecture based on the fourteen-way valve.

[0020] Figure 3 This is a schematic diagram of the third interconnection operating condition of the thermal management system architecture based on the fourteen-way valve.

[0021] Figure 4 Schematic diagram of the fourth interconnected operating condition of the thermal management system architecture based on the fourteen-way valve.

[0022] Figure 5 This is a schematic diagram of the fifth interconnected operating condition of the thermal management system architecture based on the fourteen-way valve.

[0023] Figure 6 This is a schematic diagram of the sixth interconnected operating condition of the thermal management system architecture based on a fourteen-way valve.

[0024] Figure 7 This is a schematic diagram of the seventh interconnected operating condition of the thermal management system architecture based on the fourteen-way valve.

[0025] Figure 8 This is a schematic diagram of the eighth interconnected working condition of the thermal management system architecture based on the fourteen-way valve.

[0026] Fig. 9 This is a schematic diagram of the ninth interconnected working condition of the thermal management system architecture based on the fourteen-way valve.

[0027] Fig.10 This is a schematic diagram of the tenth interconnected operating condition of the thermal management system architecture based on a fourteen-way valve.

[0028] Fig.11 This is a schematic diagram of the eleventh interconnection operating condition of the thermal management system architecture based on the fourteen-way valve.

[0029] Fig.12 This is a schematic diagram of the twelfth interconnected operating condition of the thermal management system architecture based on the fourteen-way valve.

[0030] Fig.13 This is a schematic diagram of the thirteenth interconnection operating condition of the thermal management system architecture based on the fourteen-way valve.

[0031] Fig.14 This is a schematic diagram of the fourteenth interconnected operating condition of the thermal management system architecture based on the fourteen-way valve.

[0032] Fig.15 This is a port diagram of a fourteen-way valve in a thermal management system architecture based on a fourteen-way valve.

[0033] Fig.16 It is a flow chart of the control method of the thermal management system architecture based on the fourteen-way valve.

[0034] Numbers in the figure: 1, air conditioning circuit; 2, battery circuit; 3, electric drive circuit; 4, heating circuit; 5, 14-way valve; 6, compressor; 7, heating core; 8, cooler; 9, gas-liquid separator; 10, first electronic expansion valve; 11, second electronic expansion valve; 12, evaporator; 13, power battery; 14, electric drive water pump; 15, power supply assembly; 16, electric drive assembly; 17, heating water pump; 18, condenser; 19, circulating water circuit; 20, heat dissipation circuit; 21, first auxiliary branch; 22, second auxiliary branch ; 23. Circulating water pump; 001. First port; 002. Second port; 003. Third port; 004. Fourth port; 005. Fifth port; 006. Sixth port; 007. Seventh port; 008. Eighth port; 009. Ninth port; 010. Tenth port; 011. Eleventh port; 012. Twelfth port; 013. Thirteenth port; 014. Fourteenth port; 71. First heat exchange channel; 72. Second heat exchange channel; 81. Third heat exchange channel; 82. Fourth heat exchange channel. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] Example 1 Please refer to Figure 1-Figure 14 The first to fourteenth interconnected working condition schematic diagrams of the thermal management system architecture based on the fourteen-way valve provided in the present embodiment are shown, and the thermal management system architecture at least includes: an air conditioning circuit 1, a battery circuit 2, an electric drive circuit 3, and a warm air circuit 4; The air conditioning circuit 1, the battery circuit 2, the electric drive circuit 3 and the heating circuit 4 are interconnected through a 14-way valve 5; wherein the air conditioning circuit 1 includes at least two heat exchange components; The fourteen-way valve 5 has fourteen valve ports, and every two valve ports of the fourteen-way valve 5 are connected to a circuit; a rotatable valve core is arranged inside the fourteen-way valve 5, and a plurality of independently arranged liquid channels are formed inside the valve core; As the valve core rotates, different fluid paths connect two different valve ports. The battery circuit 2, the electric drive circuit 3 and the warm air circuit 4 can be conducted according to the target working mode, and heat can be exchanged with the air conditioning circuit 1 at the heat exchanger to control the energy flow of the thermal management system.

[0038] In the embodiment of the present application, the thermal management system architecture includes at least: an air-conditioning circuit 1, a battery circuit 2, an electric drive circuit 3 and a warm air circuit 4, which can be used to achieve heating and cooling of the passenger compartment, heating and cooling of the battery and electric drive and other vehicle functional requirements.

[0039] In order to achieve the problem of reasonable heat flow, most current integrated thermal management systems require complex circuit connections; accordingly, a variety of thermal management components will be arranged, such as water valves or electronic valves, etc., making its own architecture complex; so the embodiment of the present application connects the air-conditioning circuit 1, the battery circuit 2, the electric drive circuit 3 and the warm air circuit 4 to each other through a fourteen-way valve 5, so that each circuit can be conducted according to the target working mode, which greatly simplifies the thermal management system architecture; specifically, since the fourteen-way valve 5 has fourteen valve ports, and every two valve ports of the fourteen-way valve 5 will be connected to the two ends of a circuit, and the valve core inside the fourteen-way valve 5 has multiple liquid channels, then when the valve core rotates, different valve ports will be connected through liquid channels of different connection forms; liquid channels of different connection forms, for example, are liquid channels connecting adjacent valve ports, liquid channels connecting spaced valve ports, or liquid channels connecting two spaced valve ports, etc.

[0040] Based on the above and Figure 1 In the structure shown, two heat exchange components are provided in the air-conditioning circuit 1 for heat exchange between the circuits. After the fourteen-way valve 5 connects the battery circuit 2, the electric drive circuit 3 and the warm air circuit 4 according to the target working mode, heat exchange can be carried out with the air-conditioning circuit 1 at the heat exchange component, so as to reasonably configure the energy flow between the circuits; wherein, the warm air circuit 4 is connected to one of the heat exchange channels in a heat exchange component, thereby realizing heating and cooling of the passenger compartment.

[0041] See also Figure 1 and Figure 2 In a preferred embodiment, the fourteen valve ports of the fourteen-way valve 5 sequentially form a first port 001 to a fourteenth port 014; The battery circuit 2 is connected to the first port 001 and the eighth port 008 respectively; the electric drive circuit 3 is connected to the fifth port 005 and the twelfth port 012 respectively; and the warm air circuit 4 is connected to the sixth port 006 and the seventh port 007 respectively.

[0042] It should be explained that the ports formed by the valve ports of the fourteen-way valve are further limited to the first to fourteenth ports only for the convenience of explaining the connection and coordination between each port and the circuit. In essence, there is no essential distinction between the valve ports themselves.

[0043] In a preferred embodiment, the two heat exchangers in the air conditioning circuit are the heater core 7 and the cooler 8, and in the air conditioning circuit, the compressor 6, the heater core 7, the cooler 8 and the gas-liquid separator 9 are sequentially connected to form a circulation flow path; The heater core 7 has a first heat exchange channel 71 and a second heat exchange channel 72; the cooler 8 has a third heat exchange channel 81 and a fourth heat exchange channel 82; The output end of the compressor 6 is connected to one end of the first heat exchange channel 71 , the other end of the first heat exchange channel 71 is connected to the third heat exchange channel 81 , and the other end of the third heat exchange channel 81 is connected to the input end of the gas-liquid separator 9 .

[0044] Specifically, the two heat exchange components are a heater core 7 and a cooler 8, and they are provided with a first heat exchange channel 71, a second heat exchange channel 72, a third heat exchange channel 81, and a fourth heat exchange channel 82, respectively, for heat exchange between two media at different temperatures; further, in the air conditioning circuit, the heater core 7 is usually located in the heater water tank, and the compressor 6 compresses the refrigerant into a high-temperature and high-pressure gaseous refrigerant, and then enters the circulation flow path to participate in heat exchange; Furthermore, under refrigeration conditions, the high-temperature and high-pressure gaseous refrigerant flows through the heater core 7 and is converted into medium-temperature or low-temperature and high-pressure liquid refrigerant through heat exchange, thereby transferring the heat in the passenger compartment; subsequently, the medium-temperature or low-temperature and high-pressure liquid refrigerant will further exchange heat with the medium in the fourth heat exchange channel 82 at the cooler via the first electronic expansion valve 10, and finally return to the compressor 6 through the gas-liquid separator 9; the design of the gas-liquid separator 9 here can be used to separate the gas and liquid components in the fluid, ensuring that the refrigerant returning to the compressor 9 operates in the correct state.

[0045] See also Figure 2 , in a preferred embodiment, the air conditioning circuit further comprises: a first branch circuit connected in parallel on both sides of the cooler 8; A first electronic expansion valve 10 is provided between the heater core 7 and the cooler 8, one end of the first branch circuit is connected between the first electronic expansion valve 10 and the heater core 7, and the other end thereof is connected to the input end of the gas-liquid separator 9; The first branch circuit is provided with a second electronic expansion valve 11 and an evaporator 12 in sequence.

[0046] Specifically, the evaporator 12 is generally arranged in the air-conditioning box. The evaporator 12 is connected in parallel on both sides of the cooler 8 through the first branch circuit. After being converted into medium-temperature or low-temperature and high-pressure liquid refrigerant through heat exchange at the warm air core 7 and passing through the second electronic expansion valve 11, the evaporator 12 can convert the liquid low-temperature refrigerant into vapor and absorb the heat of the cooled medium to achieve the corresponding refrigeration purpose; in addition, the first electronic expansion valve 10 and the second electronic expansion valve 11 can be used to reduce the pressure, throttle and adjust the flow of the medium that needs to enter the cooler 8 and the evaporator 12.

[0047] See also Figure 1 , Figure 3 and Figure 4 In a preferred embodiment, the battery circuit 2 at least includes a power battery 13; The electric drive circuit 3 at least includes: an electric drive water pump 14, a power supply assembly 15 and an electric drive assembly 16; wherein the output end of the electric drive water pump 14 is connected to the power supply assembly 15, and its input end is connected to the fifth port 005; one end of the electric drive assembly 16 is connected to the power supply assembly 15, and the other end is connected to the twelfth port 012; The warm air circuit 4 includes at least: a warm air water pump 17, a condenser 18 (type, for example, a water-cooled condenser) and a warm air core 7 in the air-conditioning circuit; wherein the output end of the warm air water pump 17 is connected to the condenser 18, and its input end is connected to the seventh port 007; the output end of the condenser 18 is connected to the input end of the second heat exchange channel 72, and the output end of the second heat exchange channel 72 is connected to the sixth port 006.

[0048] Specifically, although the battery circuit 2 is not provided with a water pump, the fourteen-way valve 5 can be used to connect the liquid circuit with other circuits to simplify the architecture of the thermal management system; the electric drive circuit 3 includes an electric drive water pump 14, a power supply assembly 15 and an electric drive assembly 16, wherein the electric drive water pump 14 is used to provide circulating coolant in the corresponding circuit, and the circulating coolant can cool the power supply assembly 15 and the electric drive assembly 16 or utilize the remaining heat thereof by flowing through the power supply assembly 15 and the electric drive assembly 16; Similarly, the warm air water pump 17, the condenser 18 in the warm air circuit 4 and the warm air core 7 in the air-conditioning circuit; the warm air water pump 17 is also used to provide circulating coolant in the corresponding circuit. At the same time, under refrigeration conditions, the circulating coolant through the condenser 18 will also flow into the second heat exchange channel 72 to exchange heat with the high-temperature and high-pressure gaseous refrigerant, thereby absorbing its heat.

[0049] See also Figure 5-Figure 8 , in a preferred embodiment, the thermal management system architecture further includes: a circulating water loop 19, a heat dissipation loop 20, a first auxiliary branch 21, and a second auxiliary branch 22; The two ends of the circulating water loop 19 are respectively connected to the second port 002 and the ninth port 009; the two ends of the heat dissipation loop 20 are respectively connected to the fourth port 004 and the eleventh port 011; the two ends of the first auxiliary branch 21 are respectively connected to the third port 003 and the tenth port 010; the two ends of the second auxiliary branch 22 are respectively connected to the thirteenth port 013 and the fourteenth port 014; wherein, the first auxiliary branch 21 is connected to the two ends of the fourth heat exchange channel 82.

[0050] Furthermore, the circulating water loop 19 at least includes: a circulating water pump 23 , and the output end of the circulating water pump 23 is connected to the second port 002 , and the input end thereof is connected to the ninth port 009 ; and the heat dissipation loop 20 at least includes: a radiator 24 .

[0051] The circulating water circuit 19 and the heat dissipation circuit 20 can be connected with the aforementioned different circuits through a simple water pump and radiator architecture under the structure of the fourteen-way valve 5 to meet the heat dissipation requirements of different circuits, and can also provide circulating coolant for the circuit, which not only meets the functional requirements but also reduces the complexity of the architecture; it should be noted that, generally, the radiator 24 and the cooling fan work together to form an efficient heat dissipation circuit.

[0052] Similarly, the first auxiliary branch 21 and the second auxiliary branch 22 are connected to the corresponding port auxiliary circuits at both ends, and can cooperate with the aforementioned circuits to achieve corresponding needs. For example, the first auxiliary branch 21 is connected with both ends of the fourth heat exchange channel 82, so heat exchange can be carried out at the cooler 8 through the connection with the first auxiliary branch 21.

[0053] See also Figure 1-Figure 15 , in a preferred embodiment, the fourteen-way valve 5 has multiple working states; like Figure 1 As shown, in one of the working states, the first port 001 is connected to the second port 002; the third port 003 is connected to the fourth port 004; the fifth port 005 is connected to the fourteenth port 014; the sixth port 006 is connected to the seventh port 007; the eighth port 008 is connected to the eleventh port 011; the ninth port 009 is connected to the tenth port 010; the twelfth port 012 is connected to the thirteenth port 013; The warm air circuit 4 and the air conditioning circuit 1 perform heat exchange at the warm air core 7 , the electric drive circuit 3 and the second auxiliary branch 22 form a circulating liquid circuit, the battery circuit 2 , the circulating water circuit 19 , the heat dissipation circuit 20 and the first auxiliary branch 21 form a circulating liquid circuit, and perform heat exchange at the cooler 7 .

[0054] The above process is one of the working states of the thermal management system architecture, which will now be recorded as the first working state. The interconnected loops formed by it (except the air-conditioning loop 1) include the following three: power battery 13→radiator 24→cooler 8→circulating water pump 23→power battery 13; electric drive components (power supply assembly 15+electric drive assembly 16)→electric drive water pump 14→electric drive components; warm air water pump 17→condenser 18→warm air core 7→warm air water pump 17; this working state is suitable for medium and low temperature environment conditions, and the power battery 13 needs to be cooled by the radiator 24. At this time, the air-conditioning loop is in heat pump mode, using the radiator 24 to dissipate heat for the power battery 13, and at the same time the electric drive components store heat and release it for use when needed.

[0055] The following are detailed descriptions of other working states: like Figure 2 As shown, in the second working state, the first port 001 is connected to the second port 002; the third port 003 is connected to the sixth port 006; the fifth port 005 is connected to the fourth port 004; the seventh port 007 is connected to the eighth port 008; the ninth port 009 is connected to the fourteenth port 014; the tenth port 010 is connected to the eleventh port 011; the twelfth port 012 is connected to the thirteenth port 013; specifically, in the second working state, all circuits are connected and can be used to add refrigerant, and there is no actual thermal management function.

[0056] like Figure 3 As shown, in the third working state, the first port 001 is connected to the tenth port 010; the second port 002 is connected to the third port 003; the fourth port 004 is connected to the seventh port 007; the sixth port 006 is connected to the fifth port 005; the ninth port 009 is connected to the eighth port 008; the twelfth port 012 is connected to the eleventh port 011; the fourteenth port 014 is connected to the thirteenth port 013; The battery circuit 2, the first auxiliary branch 21, and the circulating water circuit 19 are connected to form a circulating liquid circuit; the electric drive circuit 3, the heat dissipation circuit 20 and the warm air circuit 4 are connected to form a circulating liquid circuit. The two circulating liquid circuits can exchange heat with the air conditioning circuit 1 at the cooler 8 and the warm air core 7 respectively.

[0057] In the third working state, the interconnecting circuits formed therein (except the air-conditioning circuit 1) include the following two: power battery 13→circulating water pump 23→cooler 8→circulating water pump 23; electric drive components→radiator 24→warm air water pump 17→condenser 18→warm air core 7→electric drive water pump 14→electric drive components; specifically, this working state is suitable for high temperature environment conditions. At this time, the air-conditioning circuit is in cooling mode, which can realize the cooling and temperature equalization of the power battery 13 and the cooling of the electric drive components. At the same time, the heat dissipation through the condenser 18 can also cool the passenger compartment.

[0058] like Figure 4 As shown, in the fourth working state, the first port 001 is connected to the fourteenth port 014; the second port 002 is connected to the eleventh port 011; the fourth port 004 is connected to the third port 003; the fifth port 005 is connected to the eighth port 008; the sixth port 006 is connected to the seventh port 007; the tenth port 010 is connected to the ninth port 009; the twelfth port 012 is connected to the thirteenth port 013; The battery circuit 2, the electric drive circuit 3, and the second auxiliary branch 22 form a circulating liquid circuit; the warm air circuit 4 forms a separate circulating liquid circuit; the above two circulating liquid circuits can exchange heat with the air conditioning circuit 1 at the cooler 8 and the warm air core 7 respectively; the first auxiliary branch 21, the circulating water circuit 19, and the heat dissipation circuit 20 are connected to form a circulating liquid circuit.

[0059] In the fourth working state, the interconnecting circuits formed therein (except the air-conditioning circuit 1) include the following three: power battery 13→electric drive water pump 14→electric drive components→power battery 13; heater water pump 17→condenser 18→heater core 7; circulating water pump 23→radiator 24→cooler 8→circulating water pump 23; this working state is suitable for medium and low temperature environments, and the waste heat of the electric drive components is insufficient (for example, only enough to heat the passenger compartment) or the passenger compartment has a heating demand. At this time, the air-conditioning circuit is in heat pump mode, and the waste heat of the electric drive components can be used to heat the power battery 13. At the same time, in heat pump mode, the ambient heat can be absorbed by the cooler 8 to heat the passenger compartment.

[0060] like Figure 5 As shown, in the fifth working state, the first port 001 is connected to the second port 002; the third port 003 is connected to the twelfth port 012; the fourth port 004 is connected to the fifth port 005; the sixth port 006 is connected to the ninth port 009; the seventh port 007 is connected to the eighth port 008; the tenth port 010 is connected to the eleventh port 011; the fourteenth port 014 is connected to the thirteenth port 013; The warm air circuit 4, the circulating water circuit 19, and the battery circuit 2 form a circulating liquid circuit; the electric drive circuit 3, the first auxiliary branch 21, and the heat dissipation circuit 20 form a circulating liquid circuit; the above two circulating liquid circuits can exchange heat with the air conditioning circuit 1 at the cooler 8 and the warm air core 7 respectively.

[0061] In the fifth working state, the interconnecting circuits formed therein (except the air-conditioning circuit 1) include the following two: power battery 13→heater water pump 17→condenser 18→heater core 7→circulating water pump 23→power battery 13; electric drive components→cooler 8→radiator 24→electric drive water pump 14→electric drive components; this working state is suitable for medium and low temperature environments, and the electric drive components have a lot of residual heat (for example, enough to heat the power battery 13 and the passenger compartment) or both the power battery 13 and the passenger compartment have heating requirements. At this time, the air-conditioning circuit is in heat pump mode, and uses circuit heat exchange to absorb heat from the environment and the electric drive components, thereby heating the power battery 13 and the passenger compartment.

[0062] like Figure 6 As shown, in the sixth working state, the first port 001 is connected to the fourteenth port 014; the second port 002 is connected to the third port 003; the fourth port 004 is connected to the thirteenth port 013; the fifth port 005 is connected to the sixth port 006; the seventh port 007 is connected to the tenth port 010; the eighth port 008 is connected to the ninth port 009; the twelfth port 012 is connected to the eleventh port 011; The warm air circuit 4, the circulating water circuit 19, the battery circuit 2, the electric drive circuit 3, the first auxiliary branch 21, the heat dissipation circuit 20, and the second auxiliary branch 22 form a circulating liquid circuit; in the sixth working state, the interconnected circuit formed therein (except the air-conditioning circuit 1) includes the following: power battery 13→circulating water pump 23→cooler 8→warm air water pump 17→condenser 18→warm air core 7→electric drive water pump 14→electric drive components→radiator 24→power battery 13; this working state is suitable for driving conditions under medium temperature environment conditions. At this time, the air-conditioning circuit is not working, and the radiator 24 can be used to dissipate heat for the power battery 13 and the electric drive components.

[0063] like Figure 7 As shown, in the seventh working state, the first port 001 is connected to the sixth port 006; the second port 002 is connected to the third port 003; the fourth port 004 is connected to the fifth port 005; the seventh port 007 is connected to the eighth port 008; the ninth port 009 is connected to the twelfth port 012; the tenth port 010 is connected to the eleventh port 011; the thirteenth port 013 is connected to the fourteenth port 014; this working state is the same as the fourth working state, so it will not be used under normal circumstances, and it will not be described here.

[0064] like Figure 8As shown, in the eighth working state, the first port 001 is connected to the fourteenth port 014; the second port 002 is connected to the seventh port 007; the fourth port 004 is connected to the third port 003; the sixth port 006 is connected to the fifth port 005; the ninth port 009 is connected to the eighth port 008; the tenth port 010 is connected to the thirteenth port 013; the twelfth port 012 is connected to the eleventh port 011; this working state is the same as the fifth working state, so it will not be used under normal circumstances, and it will not be described here.

[0065] like Fig. 9 As shown, in the ninth working state, the first port 001 is connected to the second port 002; the third port 003 is connected to the eighth port 008; the fourth port 004 is connected to the fifth port 005; the sixth port 006 is connected to the seventh port 007; the ninth port 009 is connected to the tenth port 010; the eleventh port 011 is connected to the fourteenth port 014; the twelfth port 012 is connected to the thirteenth port 013; The battery circuit 2, the first auxiliary branch 21, and the circulating water circuit 19 form a circulating liquid circuit; the warm air circuit 4 forms a separate circulating liquid circuit; the above two circulating liquid circuits can exchange heat with the air conditioning circuit 1 at the cooler 8 and the warm air core 7 respectively; the electric drive circuit 3, the second auxiliary branch 22, and the heat dissipation circuit 20 form a circulating liquid circuit.

[0066] In the ninth working state, the interconnecting circuits formed therein (except the air-conditioning circuit 1) include the following three: power battery 13→cooler 8→circulating water pump 23→power battery 13; electric drive components→radiator 24→electric drive water pump 14→electric drive components; heater water pump 17→condenser 18→heater core 7; this working state is suitable for low-temperature environment conditions, the power battery 13 is in a fast charging condition or in a high-load discharge condition (such as high speed operation or climbing), at this time, the air-conditioning circuit is in heat pump mode, the power battery 13 can be used to dissipate heat through heat exchange at the cooler 8, and the electric drive components are dissipated through the radiator 24; at the same time, in the heat pump mode, the heat of the power battery 13 can also be absorbed by the cooler 8 to heat the passenger compartment.

[0067] like Fig.10 As shown, in the tenth working state, the first port 001 is connected to the twelfth port 012; the second port 002 is connected to the third port 003; the fourth port 004 is connected to the ninth port 009; the sixth port 006 is connected to the fifth port 005; the seventh port 007 is connected to the eighth port 008; the tenth port 010 is connected to the eleventh port 011; the fourteenth port 014 is connected to the thirteenth port 013; The battery circuit 2, the heater circuit 4, and the electric drive circuit 3 form a circulating liquid circuit; the circulating water circuit 19, the first auxiliary branch 21, and the heat dissipation circuit 20 form a circulating liquid circuit; the above two circulating liquid circuits can exchange heat with the air conditioning circuit 1 at the cooler 8 and the heater core 7 respectively.

[0068] In the tenth working state, the interconnecting circuits formed therein (except the air-conditioning circuit 1) include the following two: power battery 13→heater water pump 17→condenser 18→heater core 7→electric drive water pump 14→electric drive components→power battery 13; circulating water pump 23→cooler 8→radiator 24→circulating water pump 23; this working state is suitable for medium and low temperature environments, and the electric drive components have more heat, and the required water temperature in the passenger compartment is not high (for example, the electric drive water temperature can meet the required water temperature in the passenger compartment). At this time, the air-conditioning circuit is in heat pump mode, and the power battery 13 and the passenger compartment are heated by absorbing heat from the environment and the waste heat of the electric drive components.

[0069] like Fig.11 As shown, in the eleventh working state, the first port 001 is connected to the fourteenth port 014; the second port 002 is connected to the thirteenth port 013; the third port 003 is connected to the fourth port 004; the fifth port 005 is connected to the tenth port 010; the sixth port 006 is connected to the seventh port 007; the eighth port 008 is connected to the ninth port 009; the eleventh port 011 is connected to the twelfth port 012; The warm air circuit 4 forms a separate circulating liquid circuit; the electric drive circuit 3, the heat dissipation circuit 20, and the first auxiliary branch 21 form a circulating liquid circuit; the above two circulating liquid circuits can exchange heat with the air conditioning circuit 1 at the cooler 8 and the warm air core 7 respectively; the battery circuit 2, the circulating water circuit 19, and the second auxiliary branch 22 form a circulating liquid circuit.

[0070] In the eleventh working state, the interconnecting circuits formed therein (except the air-conditioning circuit 1) include the following three: power battery 13→circulating water pump 23→power battery 13; electric drive components→radiator 24→cooler 8→electric drive water pump 14→electric drive components; warm air water pump 17→condenser 18→warm air core 7→warm air water pump 17; this working state is suitable for medium and low temperature environment conditions, the electric drive components have a lot of waste heat, and the passenger compartment has a heating demand, but the power battery 13 has no heating demand. At this time, the waste heat generated by the electric drive components can be used to achieve a uniform temperature of the power battery 13, and the heat exchange at the cooler 8 combined with the ambient heat can heat the passenger compartment.

[0071] like Fig.12As shown, in the twelfth working state, the first port 001 is connected to the second port 002; the third port 003 is connected to the fourteenth port 014; the fourth port 004 is connected to the fifth port 005; the sixth port 006 is connected to the eleventh port 011; the seventh port 007 is connected to the eighth port 008; the ninth port 009 is connected to the tenth port 010; the twelfth port 012 is connected to the thirteenth port 013; this working state is the same as the fifth working state mentioned above, so it will not be used under normal circumstances, and it will not be described here.

[0072] like Fig.13 As shown, in the thirteenth working state, the first port 001 is connected to the fourth port 004; the second port 002 is connected to the third port 003; the fifth port 005 is connected to the sixth port 006; the seventh port 007 is connected to the twelfth port 012; the ninth port 009 is connected to the eighth port 008; the tenth port 010 is connected to the eleventh port 011; the thirteenth port 013 is connected to the fourteenth port 014; this working state is the same as the sixth working state mentioned above, so it will not be used under normal circumstances, and it will not be described here.

[0073] like Fig.14 As shown, in the fourteenth working state, the first port 001 is connected to the fourteenth port 014; the second port 002 is connected to the fifth port 005; the third port 003 is connected to the fourth port 004; the sixth port 006 is connected to the seventh port 007; the eighth port 008 is connected to the thirteenth port 013; the ninth port 009 is connected to the tenth port 010; the eleventh port 011 is connected to the twelfth port 012; specifically, in the fourteenth working state, since the power battery is separated into a single circuit and cannot be connected to other circuits, energy cannot flow, this mode is generally not used.

[0074] Example 2 First of all, based on the above content, it can be seen that the thermal management system has multiple circuits. Embodiment 1 of the present application realizes the interconnection of multiple circuits through multiple fourteen-way valves 5, thereby forming multiple comprehensive circuits to meet people's functional requirements for the thermal management system; below, combined with the above-mentioned description of the architecture and principles of the thermal management system, its control method in practical applications is introduced.

[0075] like Fig.16 As shown, based on the thermal management system architecture based on the fourteen-way valve shown in Example 1, the present application embodiment proposes a control method for the thermal management system architecture based on the fourteen-way valve, including the following steps: S1. Obtaining a first temperature control requirement of a thermal management system of a target vehicle and multiple operating condition parameters of the current thermal management system; the first temperature control requirement at least includes: a cooling requirement and a heating requirement of an electric drive module, a battery module, and a passenger compartment; the multiple operating condition parameters at least include: a driving condition, an environmental condition, a battery operating condition, and an electric drive operating condition; Due to the first temperature control demand of the target vehicle's power battery 13, electric drive components and passenger compartment, on the one hand, they are monitored and collected through the thermal management control system, and on the other hand, the user can choose to turn it on according to his own needs. Therefore, after obtaining the first temperature control demand, it is also possible to combine a variety of operating conditions parameters to select the optimal target working mode that can take into account multiple temperature control requirements.

[0076] S2. based on the first temperature control requirement and various operating parameters of the current thermal management system, determining a target operating mode of the thermal management system; Specifically, in the embodiment of the present application, there are fourteen working modes, which can be combined with the first temperature control requirement and multiple operating parameters to obtain the final target working mode.

[0077] It should be noted that, in combination with the above-mentioned judgment and collection actions, the method can be executed by the vehicle, or can be executed collaboratively by the vehicle domain controller (VDC), battery management system (BMS) and instrument in the vehicle.

[0078] Combined with the above introduction to the working state of the fourteen-way valve, it can be seen that each working state corresponds to different working conditions, so eight working modes can be obtained in the end, and each working condition used becomes a working mode of a thermal management system architecture.

[0079] Below, the working modes corresponding to the third working state, the ninth working state and the eleventh working state are selected as examples, and other working modes are not described in detail.

[0080] (1) If the current environmental condition is a high temperature condition, the electric drive module, the battery module and the passenger compartment all need to be cooled; at this time, the working mode corresponding to the third working state of the fourteen-way valve 5 can be selected. This working mode is the current target working mode, which can achieve cooling and temperature equalization of the power battery 13 and cooling of the electric drive components. At the same time, the heat dissipation of the condenser 18 can also cool the passenger compartment.

[0081] (2) If the current environmental condition is a low temperature condition, and the power battery 13 in the battery module is in a fast charging condition or a high load discharging condition (or the corresponding driving condition is high speed operation or climbing a slope); at this time, the air conditioning circuit is in heat pump mode for heating, and the corresponding working mode of the fourteen-way valve 5 in the ninth working state can be selected. This working mode is the current target working mode, and the power battery 13 can be used to dissipate heat through heat exchange at the cooler 8, while the electric drive components are cooled through the radiator 24; at the same time, in the heat pump mode, the heat of the power battery 13 can be absorbed by the cooler 8 to heat the passenger compartment.

[0082] (3) If the current environmental condition is a medium-low temperature condition, and it is detected that the electric drive components have a lot of residual heat, and there is a heating demand for the passenger compartment but no heating demand for the power battery 13, the working mode corresponding to the 14-way valve 5 in the eleventh working state can be selected. This working mode is the current target working mode. The residual heat generated by the electric drive components can be used to achieve a uniform temperature of the power battery 13, and the heat exchange at the cooler 8 combined with the ambient heat can be used to heat the passenger compartment.

[0083] S3. According to the port connection status of the fourteen-way valve 5 in the target working mode, the valve core in the fourteen-way valve 5 is controlled to rotate to a corresponding angle to realize the connection of the corresponding ports.

[0084] After the corresponding working mode is obtained, the valve core of the fourteen-way valve 5 can be controlled to rotate to a corresponding angle according to the port connection status in each mode, so that the corresponding ports are connected.

[0085] In a preferred embodiment, the method further comprises the following step 1: Step 1: Determine whether the air conditioning circuit 1 needs to be filled with refrigerant. If so, select the refrigerant filling mode in the thermal management system, and control the valve core in the fourteen-way valve 5 to rotate according to the port connection status corresponding to the refrigerant filling mode.

[0086] The refrigerant filling mode corresponds to the second working state of the fourteen-way valve 5. When the fourteen-way valve 5 is in the second working state, all circuits are connected and can be used to fill the refrigerant. Therefore, in actual application, if it is determined that the air conditioning circuit 1 needs to be filled with refrigerant, the refrigerant filling mode can be selected.

[0087] It needs to be explained that in the embodiments of the present application, the high temperature environment working condition, medium and low temperature working condition, medium temperature working condition, low temperature working condition and extremely low temperature working condition are described as follows.

[0088] Low temperature conditions: real-time ambient temperature T <-15℃ (the heat pump of the air heat source cannot work, and both the battery and the passenger compartment need to be heated); Medium and low temperature conditions: real-time ambient temperature T-15℃~0℃ (air heat source heat pump can work, the battery needs to be heated); medium temperature working condition: real-time ambient temperature T 0℃~30℃ (radiator can be used to cool the battery); high temperature conditions: real-time ambient temperature T >30℃ (both the battery and the electric drive need to be cooled), but the above values ​​are for illustration only and are not limitations, and can be adjusted based on actual conditions.

[0089] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A thermal management system architecture based on a fourteen-way valve, characterized in that: The thermal management system architecture comprises at least: an air conditioning circuit (1), a battery circuit (2), an electric drive circuit (3) and a heating circuit (4); The air conditioning circuit (1), the battery circuit (2), the electric drive circuit (3) and the warm air circuit (4) are interconnected via a fourteen-way valve (5); wherein the air conditioning circuit (1) comprises at least two heat exchange components; The fourteen-way valve (5) has fourteen valve ports, and every two valve ports of the fourteen-way valve (5) are connected to a circuit; a rotatable valve core is arranged inside the fourteen-way valve (5), and a plurality of independently arranged liquid channels are formed inside the valve core; When the valve core rotates, different fluid paths are connected to two different valve ports, and the battery circuit (2), the electric drive circuit (3) and the warm air circuit (4) can be connected according to the target working mode and perform heat exchange with the air conditioning circuit (1) at the heat exchange element to control the energy flow of the thermal management system.

2. The thermal management system architecture based on the fourteen-way valve according to claim 1 is characterized in that: The fourteen valve ports of the fourteen-way valve (5) sequentially form a first port (001) to a fourteenth port (014); The battery circuit (2) is connected to the first port (001) and the eighth port (008) respectively; the electric drive circuit (3) is connected to the fifth port (005) and the twelfth port (012) respectively; and the warm air circuit (4) is connected to the sixth port (006) and the seventh port (007) respectively.

3. The thermal management system architecture based on the fourteen-way valve according to claim 2 is characterized in that: The two heat exchange components in the air conditioning circuit are respectively a heater core (7) and a cooler (8), and in the air conditioning circuit, a compressor (6), the heater core (7), the cooler (8) and a gas-liquid separator (9) are connected in sequence to form a circulation flow path; The heater core (7) has a first heat exchange channel (71) and a second heat exchange channel (72); the cooler (8) has a third heat exchange channel (81) and a fourth heat exchange channel (82); The output end of the compressor (6) is connected to one end of the first heat exchange channel (71), the other end of the first heat exchange channel (71) is connected to the third heat exchange channel (81), and the other end of the third heat exchange channel (81) is connected to the input end of the gas-liquid separator (9).

4. The thermal management system architecture based on the fourteen-way valve according to claim 3 is characterized in that: The air conditioning circuit further comprises: a first branch circuit connected in parallel on both sides of the cooler (8); A first electronic expansion valve (10) is provided between the heater core (7) and the cooler (8); one end of the first branch circuit is connected between the first electronic expansion valve (10) and the heater core (7), and the other end is connected to an input end of the gas-liquid separator (9); A second electronic expansion valve (11) and an evaporator (12) are sequentially arranged on the first branch circuit.

5. The thermal management system architecture based on the fourteen-way valve according to claim 4 is characterized in that: The battery circuit (2) at least comprises a power battery (13); The electric drive circuit (3) comprises at least: an electric drive water pump (14), a power supply assembly (15) and an electric drive assembly (16); wherein the output end of the electric drive water pump (14) is connected to the power supply assembly (15), and the input end thereof is connected to the fifth port (005); one end of the electric drive assembly (16) is connected to the power supply assembly (15), and the other end is connected to the twelfth port (012); The warm air circuit (4) comprises at least: a warm air water pump (17), a condenser (18), and the warm air core (7) in the air conditioning circuit; wherein the output end of the warm air water pump (17) is connected to the condenser (18), and the input end thereof is connected to the seventh port (007); the output end of the condenser (18) is connected to the input end of the second heat exchange channel (72), and the output end of the second heat exchange channel (72) is connected to the sixth port (006).

6. The thermal management system architecture based on the fourteen-way valve according to claim 5, characterized in that: The thermal management system architecture further includes: a circulating water loop (19), a heat dissipation loop (20), a first auxiliary branch (21), and a second auxiliary branch (22); The two ends of the circulating water loop (19) are respectively connected to the second port (002) and the ninth port (009); the two ends of the heat dissipation loop (20) are respectively connected to the fourth port (004) and the eleventh port (011); the two ends of the first auxiliary branch (21) are respectively connected to the third port (003) and the tenth port (010); the two ends of the second auxiliary branch (22) are respectively connected to the thirteenth port (013) and the fourteenth port (014); wherein the first auxiliary branch (21) is connected to the two ends of the fourth heat exchange channel (82).

7. The thermal management system architecture based on the fourteen-way valve according to claim 6, characterized in that: The circulating water loop (19) comprises at least: a circulating water pump (23); The output end of the circulating water pump (23) is connected to the second port (002), and the input end thereof is connected to the ninth port (009); The heat dissipation circuit (20) comprises at least a radiator (24).

8. The thermal management system architecture based on the fourteen-way valve according to claim 7, characterized in that: The fourteen-way valve (5) has multiple working states; In one working state, the first port (001) is connected to the second port (002); the third port (003) is connected to the fourth port (004); the fifth port (005) is connected to the fourteenth port (014); the sixth port (006) is connected to the seventh port (007); the eighth port (008) is connected to the eleventh port (011); the ninth port (009) is connected to the tenth port (010); the twelfth port (012) is connected to the thirteenth port (013); The warm air circuit (4) and the air conditioning circuit (1) perform heat exchange at the warm air core (7); the electric drive circuit (3) and the second auxiliary branch (22) form a circulating liquid circuit; the battery circuit (2), the circulating water circuit (19), the heat dissipation circuit (20) and the first auxiliary branch (21) form a circulating liquid circuit and perform heat exchange at the cooler (7).

9. A control method for a thermal management system architecture based on a fourteen-way valve, characterized in that: Based on the thermal management system architecture based on the fourteen-way valve according to any one of claims 1 to 8, the control method includes: Acquire a first temperature control requirement of a thermal management system of a target vehicle and a plurality of operating condition parameters of the thermal management system at present; the first temperature control requirement at least includes: a cooling requirement and a heating requirement of an electric drive module, a battery module and a passenger compartment; the plurality of operating condition parameters at least include: a driving condition, an environmental condition, a battery operating condition and an electric drive operating condition; Based on the first temperature control requirement and multiple operating parameters of the current thermal management system, determining a target operating mode of the thermal management system; According to the port connection status of the fourteen-way valve (5) in the target working mode, the valve core in the fourteen-way valve (5) is controlled to rotate to a corresponding angle to achieve the connection of the corresponding ports.

10. The control method of the thermal management system architecture based on the fourteen-way valve according to claim 9, characterized in that: The control method also includes: It is determined whether the air conditioning circuit (1) needs to be filled with refrigerant. If so, a refrigerant filling mode in the thermal management system is selected, and the valve core in the fourteen-way valve (5) is controlled to rotate according to the port connection status corresponding to the refrigerant filling mode.

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