Thermal management system and vehicle

Abstract

The invention discloses a heat management system and a vehicle. The heat management system comprises a refrigerant loop, a heating circulation loop, a heat dissipation circulation loop, a driving motor loop and a battery pack loop, wherein the heating circulation loop, the heat dissipation circulation loop, the driving motor loop and the battery pack loop are connected with one another through a twelve-way valve, a four-way valve and a plurality of three-way pipes; the battery pack loop comprises a battery cooler and a battery pack; the heating circulation loop internally comprises an air conditioner core body, a water-cooled condenser and a heater; the battery cooler and the water-cooled condenser share the refrigerant loop; the twelve-way valve and the four-way valve have multiple conduction modes, and the flow directions of cooling liquid are different in different conduction modes. The cooling and heating requirements of the passenger compartment are indirectly met through cooling liquid circulation, the complexity of a heat management cooling liquid circulation system, the number of parts and the weight of the whole vehicle are reduced by using a multi-way valve, and meanwhile energy consumption is lower.

Description

Technical Field

[0001] This application relates to the technical field of automobiles, and particularly to a thermal management system and a vehicle. Background Art

[0002] R290 is an environment-friendly refrigerant and can be used as a refrigerant to replace R134a and R1234yf in an automotive air-conditioning system. The advantages of R290 in the automotive air-conditioning system include: it will not damage the atmosphere, there is no risk of greenhouse effect and ozone layer depletion, and at the same time, it has higher refrigeration efficiency, which can reduce the energy consumption of the automotive air-conditioning system. However, R290 has high flammability and toxicity, and fire prevention design needs to be emphasized during use to reduce or eliminate risks and personal injuries.

[0003] However, in a traditional air-conditioning heat pump system, due to the presence of an evaporator and an indoor condenser, if R290 refrigerant is used, in case of a fire, the flammability of R290 will directly blow the flame into the passenger compartment through the air-conditioning box, causing personal injuries. Therefore, how to develop a thermal management system for pure electric vehicles mainly based on coolant circulation has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0004] To solve the above problems, this application proposes a thermal management system and a vehicle that overcome or at least partially solve the above problems. The technical solutions are as follows:

[0005] A thermal management system includes: a refrigerant circuit, a heating circulation circuit, a heat dissipation circulation circuit, a drive motor circuit, and a battery pack circuit that are connected to each other through a twelve-way valve, a four-way valve, and a plurality of three-way pipes; the battery pack circuit includes a battery cooler and a battery pack; the heating circulation circuit includes an air-conditioning core body, a water-cooled condenser, and a heater; the battery cooler and the water-cooled condenser share the refrigerant circuit; the twelve-way valve and the four-way valve have multiple conduction modes, and the flow direction of the coolant is different under different conduction modes.

[0006] This application provides a thermal management system that can indirectly meet the cooling and heating requirements of the passenger compartment through coolant circulation. Through multiple connection modes of the four-way valve and the twelve-way valve, it can cope with various working conditions, thereby reducing the complexity, the number of components, and the vehicle weight of the thermal management coolant circulation system, and at the same time reducing the energy consumption corresponding to heating and cooling.

[0007] Optionally, the thermal management system further includes at least one of the following valves: a first valve for controlling the opening and closing of the coolant pipeline between the air conditioning core and the water-cooled condenser, a second valve for controlling the opening and closing of the coolant pipeline between the heating circulation loop and the battery pack loop, a third valve for controlling the opening and closing of the coolant pipeline between the heating circulation loop and the heat dissipation circulation loop, a fourth valve for controlling the opening and closing of the coolant pipeline between the battery cooler and the heat dissipation circulation loop, and a fifth valve for controlling the opening and closing of the coolant pipeline between the battery pack and the battery cooler.

[0008] Optionally, the first passage of the twelve-way valve is connected to the first connection port of the four-way valve and the battery pack loop through a three-way pipe; the second passage of the twelve-way valve is connected to the air conditioning core and the water-cooled condenser through a three-way pipe; the third and fourth passages of the twelve-way valve are connected to the radiator in the heat dissipation circulation loop through the same three-way pipe; the sixth passage of the twelve-way valve is connected to the radiator and the overflow tank in the heat dissipation circulation loop through a three-way pipe; the fifth and seventh passages of the twelve-way valve are respectively connected to both ends of the drive motor loop; the eighth passage of the twelve-way valve is connected to the first three-way pipe and the second three-way pipe through a three-way pipe, one end of the first three-way pipe is respectively connected to the heater and the eleventh passage of the twelve-way valve through a third three-way pipe, and the other end is connected to the second connection port of the four-way valve; one end of the second three-way valve is connected to the overflow tank in the heat dissipation circulation loop, and the other end is respectively connected to the third connection port of the four-way valve, the battery cooler and the twelfth passage of the twelve-way valve through a three-way pipe; the ninth passage of the twelve-way valve is connected to the battery pack loop through a three-way pipe; the tenth passage of the twelve-way valve is connected to the air conditioning core in the heating circulation loop.

[0009] Optionally, the conduction modes of the twelve-way valve include at least one of the following conduction modes: the second passage and the third passage are conducted, the fourth passage and the fifth passage are conducted, the seventh passage and the ninth passage are conducted, the tenth passage and the eleventh passage are conducted, and the other passages are not communicated with each other; the first passage and the second passage are conducted, the fourth passage and the fifth passage are conducted, the seventh passage and the ninth passage are conducted, the tenth passage and the eleventh passage are conducted, and the other passages are not communicated with each other; the first passage and the second passage are conducted, the fifth passage and the sixth passage are conducted, the seventh passage and the eighth passage are conducted, the tenth passage and the eleventh passage are conducted, and the other passages are not communicated with each other; the fifth passage and the sixth passage are conducted, the seventh passage and the ninth passage are conducted, the tenth passage and the eleventh passage are conducted, and the other passages are not communicated with each other; the first passage and the second passage are conducted, the fifth passage and the sixth passage are conducted, the seventh passage and the ninth passage are conducted, the tenth passage and the eleventh passage are conducted, and the other passages are not communicated with each other; the second passage and the third passage are conducted, the fifth passage and the sixth passage are conducted, the seventh passage and the eighth passage are conducted, the tenth passage and the twelfth passage are conducted, and the other passages are not communicated with each other; the second passage and the third passage are conducted, the fourth passage and the fifth passage are conducted, the seventh passage and the eighth passage are conducted, the tenth passage and the twelfth passage are conducted, and the other passages are not communicated with each other.

[0010] Optionally, the conduction modes of the four-way valve include at least one of the following conduction modes: the second connection port and the fourth connection port are conducted, and the other connection ports are not communicated with each other; the first connection port and the fourth connection port are conducted, and the other connection ports are not communicated with each other; the third connection port and the fourth connection port are conducted, and the other connection ports are not communicated with each other; the first connection port, the second connection port and the fourth connection port are conducted, and the other connection ports are not communicated with each other; the first connection port, the third connection port and the fourth connection port are conducted, and the other connection ports are not communicated with each other.

[0011] Optionally, when the tenth passage and the twelfth passage of the twelve-way valve are conducted, and the first valve for controlling the coolant pipeline between the air-conditioning core and the water-cooled condenser is closed and the second valve for controlling the coolant pipeline between the air-conditioning core and the battery cooler is opened, the battery cooler cools the air-conditioning core through the twelfth passage and the tenth passage.

[0012] Optionally, when the second passage and the third passage of the twelve-way valve are conducted, the water-cooled condenser is cooled through the heat dissipation circulation loop; when the fourth passage and the fifth passage of the twelve-way valve are conducted, the drive motor loop is cooled through the heat dissipation circulation loop.

[0013] Optionally, when the fifth passage and the sixth passage of the twelve-way valve are connected and the seventh passage and the ninth passage are connected, the heat in the drive motor circuit is absorbed by the battery cooler; when the first passage and the second passage are connected and the tenth passage and the eleventh passage are connected, the water-cooled condenser absorbs the heat of the battery cooler through the refrigerant circuit.

[0014] Optionally, when the fourth passage and the fifth passage of the twelve-way valve are connected, the seventh passage and the ninth passage are connected, and the coolant temperature in the drive motor circuit is lower than the ambient temperature, the ambient heat is absorbed through the battery cooler; when the first passage and the second passage of the twelve-way valve are connected, and the tenth passage and the eleventh passage are connected, the water-cooled condenser absorbs the heat of the battery cooler through the refrigerant circuit.

[0015] Optionally, when the fourth passage and the fifth passage of the twelve-way valve are connected, and the seventh passage and the ninth passage are connected, the heat of the drive motor circuit is absorbed by the battery cooler; when the second passage and the third passage of the twelve-way valve are connected, the tenth passage and the eleventh passage are connected and the set temperature of the air conditioner is lower than a preset threshold, the water-cooled condenser is cooled by the heat dissipation circulation circuit, and the heat of the battery cooler is absorbed by the refrigerant circuit for air conditioning heating.

[0016] Optionally, when the twelfth passage of the twelve-way valve is not connected, the second valve for controlling the opening and closing of the coolant pipeline between the heating circulation loop and the battery pack circuit is opened, the fourth valve for controlling the opening and closing of the coolant pipeline between the battery cooler and the heat dissipation circulation loop is closed, and the third connection port and the fourth connection port of the four-way valve are connected, the battery pack is cooled by the battery cooler; when the tenth passage and the eleventh passage of the twelve-way valve are connected, the heat of the battery cooler is released to the heating circulation loop through the water-cooled condenser.

[0017] Optionally, when the fifth passage and the sixth passage of the twelve-way valve are connected, the seventh passage and the ninth passage are connected, and the motor circuit coolant temperature is higher than a preset threshold, the battery pack circuit is heated through the drive motor circuit, and the battery cooler absorbs heat from the battery pack and the drive motor circuit at the same time; when the tenth passage and the eleventh passage of the twelve-way valve are connected, the heat of the battery cooler is released to the heating circulation circuit through the water-cooled condenser.

[0018] Optionally, when the fourth passage and the fifth passage of the twelve-way valve are connected, the seventh passage and the ninth passage are connected, and the ambient temperature is lower than a preset threshold, the battery pack circuit is cooled through a heat dissipation circulation circuit.

[0019] The present application also provides a vehicle, which is characterized by including the thermal management system as described in any one of the above examples.

[0020] By means of the above technical solution, a thermal management system and a vehicle provided by the present disclosure do not need to use traditional evaporators and in-vehicle condensers, and instead indirectly realize the refrigeration and heating requirements of the occupant compartment through coolant circulation, so that R290 can be used as a refrigerant to replace R134a and R1234yf, improving the environmental protection and refrigeration efficiency of the whole vehicle. By using a multi-way valve, the complexity of the thermal management coolant circulation system, the number of components and the weight of the whole vehicle are reduced.

[0021] The above description is only an overview of the technical solution of the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present disclosure more obvious and understandable, the specific embodiments of the present disclosure are specifically exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clearer and more obvious to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present disclosure. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0023] Figure 1 It is a schematic diagram of the coolant circuit connection of a thermal management system provided by an embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of the circuit connection of the thermal management system provided by an embodiment of the present application under the first thermal management strategy;

[0025] Figure 3 It is a schematic diagram of the circuit connection of the thermal management system provided by an embodiment of the present application under the second thermal management strategy;

[0026] Figure 4 It is a schematic diagram of the circuit connection of the thermal management system provided by an embodiment of the present application under the third thermal management strategy;

[0027] Figure 5 It is a schematic diagram of the circuit connection of the thermal management system provided by an embodiment of the present application under the fourth thermal management strategy;

[0028] Figure 6 It is a schematic diagram of the circuit connection of the thermal management system provided by an embodiment of the present application under the fifth thermal management strategy;

[0029] Figure 7 It is a schematic diagram of the circuit connection of the thermal management system provided by an embodiment of the present application under the sixth thermal management strategy;

[0030] Figure 8 Schematic diagram of the circuit connection of the thermal management system provided by the embodiment of the present application under the seventh thermal management strategy;

[0031] Figure 9 Schematic diagram of the circuit connection of the thermal management system provided by the embodiment of the present application under the eighth thermal management strategy;

[0032] Figure 10 Schematic diagram of the circuit connection of the thermal management system provided by the embodiment of the present application under the ninth thermal management strategy;

[0033] Figure 11 Schematic diagram of the coolant circuit connection of another thermal management system provided by the embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. Refrigerant circuit, 2. Twelve-way valve, 201. First passage, 202. Second passage, 203. Third passage, 204. Fourth passage, 205. Fifth passage, 206. Sixth passage, 207. Seventh passage, 208. Eighth passage, 209. Ninth passage, 2010. Tenth passage, 2011. Eleventh passage, 2012. Twelfth passage, 3. Four-way valve, 301. First connection port, 302. Second connection port, 303. Third connection port, 304. Fourth connection port, 4. Three-way pipe, 5. Battery cooler, 6. Battery pack, 7. Air conditioner core, 8. Water-cooled condenser, 9. Heater, 10. Overflow tank, 11. Radiator, 12. Drive motor, 13. High-voltage components, 14. Electronic water pump, 15. First valve, 16. Second valve, 17. Third valve, 18. Fourth valve, 19. Fifth valve. Detailed implementation manners

[0036] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] R290 is an environment-friendly refrigerant that can be used as a substitute for R134a and R1234yf in automotive air conditioning systems. The advantages of R290 in automotive air conditioning systems include: it does not damage the atmosphere, has no risk of greenhouse effect and ozone layer depletion, and at the same time has higher refrigeration efficiency, which can reduce the energy consumption of automotive air conditioning systems. However, R290 has high flammability and toxicity, and fire prevention design needs to be emphasized during use to reduce or eliminate risks and personnel injuries.

[0038] However, in traditional air conditioning heat pump systems, due to the presence of an evaporator and an indoor condenser, if R290 refrigerant is used, in case of a fire, the flammability of R290 will directly blow the flame into the passenger compartment through the air conditioning box, causing personnel injuries. Therefore, how to develop a pure electric vehicle thermal management system mainly based on coolant circulation has become a technical problem that needs to be urgently solved by those skilled in the art.

[0039] For this reason, this application provides a thermal management system, as Figure 1 shown. This system mainly includes: a refrigerant circuit 1, a heating circulation circuit, a heat dissipation circulation circuit, a drive motor 12 circuit, and a battery pack 6 circuit that are interconnected through a twelve-way valve 2, a four-way valve 3, and a plurality of three-way pipes 4.

[0040] Among them, the battery pack 6 circuit located Figure 1 in the lower right includes a battery cooler 5 (Chiller) and a battery pack 6 that are interconnected; the heating circulation circuit located Figure 1 in the lower left includes an air conditioning core 7, a water-cooled condenser 8, and a heater 9 (Positive Temperature Coefficient, PTC).

[0041] Located Figure 1 above the twelve-way valve 2 in the middle, the heat dissipation circulation circuit includes an overflow tank 10 and a radiator 11 that are interconnected. In this disclosure, no specific requirements are made for the position and number of the overflow tank 10, nor for the series and parallel relationships with pipelines and components, nor for the number of inlets and outlets.

[0042] Located Figure 1 in the lower right of the twelve-way valve 2 in the middle, the drive motor 12 circuit includes a drive motor 12 and high-voltage components 13 that are interconnected. Among them, the high-voltage components 13 include components such as an on-board charger (OBC), a DC-DC converter, and a distribution box. In this disclosure, the drive motor 12 and the high-voltage components 13 can be swapped in front and back positions, or can be changed to a parallel connection.

[0043] Visibly, Figure 1A plurality of valves are also provided to control the flow direction of the coolant. The present application does not limit the position and quantity of the valves. Here, an exemplary description is given for the five valves in Figure 1 : The first valve 15 is used to control the opening and closing of the coolant pipeline between the air-conditioning core 7 and the water-cooled condenser 8; the second valve 16 is used to control the opening and closing of the coolant pipeline between the air-conditioning core 7 and the battery cooler 5; the third valve 17 is used to control the opening and closing of the coolant pipeline between the heater 9 and the heat dissipation circulation loop; the fourth valve 18 is used to control the opening and closing of the coolant pipeline between the battery cooler 5 and the heat dissipation circulation loop; the fifth valve 19 is used to control the opening and closing of the coolant pipeline between the battery pack 6 and the battery cooler 5.

[0044] As can be seen from Figure 1 , the twelve-way valve 2 and the four-way valve 3 are respectively connected to the heating circulation loop, the heat dissipation circulation loop, the drive motor 12 loop, and the battery pack 6 loop through a plurality of three-way pipes 4. Specifically, the first passage 201 of the twelve-way valve 2 is connected to the first connection port 301 of the four-way valve 3 and the battery pack 6 loop through the three-way pipe 4; the second passage 202 of the twelve-way valve 2 is connected to the air-conditioning core 7 and the water-cooled condenser 8 through the three-way pipe 4; the third passage 203 and the fourth passage 204 of the twelve-way valve 2 are connected to the radiator 11 in the heat dissipation circulation loop through the same three-way pipe 4; the sixth passage 206 of the twelve-way valve 2 is connected to the radiator 11 and the overflow tank 10 in the heat dissipation circulation loop through the three-way pipe 4; the fifth passage 205 and the seventh passage 207 of the twelve-way valve 2 are respectively connected to both ends of the drive motor 12 loop; the eighth passage 208 of the twelve-way valve 2 is connected to the first three-way pipe 4 and the second three-way pipe 4 through the three-way pipe 4. Among them, the first three-way pipe 4 refers to the three-way pipe 4 located on the left side of the third valve 17, and the second three-way pipe 4 refers to the three-way pipe 4 located on the left side of the overflow tank 10. One end of the first three-way pipe 4 is respectively connected to the heater 9 and the eleventh passage 2011 of the twelve-way valve 2 through the third three-way pipe 4. The third three-way pipe 4 refers to the three-way pipe 4 directly connected to the eleventh passage 2011. The other end of the first three-way pipe 4 is connected to the second connection port 302 of the four-way valve 3; one end of the second three-way valve is connected to the overflow tank 10 in the heat dissipation circulation loop, and the other end is respectively connected to the third connection port 303 of the four-way valve 3, the battery cooler 5, and the twelfth passage 2012 of the twelve-way valve 2 through the three-way pipe 4; the ninth passage 209 of the twelve-way valve 2 is connected to the battery pack 6 loop through the three-way pipe 4; the tenth passage 2010 of the twelve-way valve 2 is connected to the air-conditioning core 7 in the heating circulation loop.

[0045] The partial conduction schemes of the twelve-way valve 2 are described as follows: For example, the second passage 202 and the third passage 203 of the twelve-way valve 2 are conducted, the fourth passage 204 and the fifth passage 205 are conducted, the seventh passage 207 and the ninth passage 209 are conducted, the tenth passage 2010 and the eleventh passage 2011 are conducted, and the other passages are not connected to each other. Or the first passage 201 and the second passage 202 are conducted, the fourth passage 204 and the fifth passage 205 are conducted, the seventh passage 207 and the ninth passage 209 are conducted, the tenth passage 2010 and the eleventh passage 2011 are conducted, and the other passages are not connected to each other; or the first passage 201 and the second passage 202 are conducted, the fifth passage 205 and the sixth passage 206 are conducted, the seventh passage 207 and the eighth passage 208 are conducted, the tenth passage 2010 and the eleventh passage 2011 are conducted, and the other passages are not connected to each other; or the fifth passage 205 and the sixth passage 206 are conducted, the seventh passage 207 and the ninth passage 209 are conducted, the tenth passage 2010 and the eleventh passage 2011 are conducted, and the other passages are not connected to each other; or the first passage 201 and the second passage 202 are conducted, the fifth passage 205 and the sixth passage 206 are conducted, the seventh passage 207 and the ninth passage 209 are conducted, the tenth passage 2010 and the eleventh passage 2011 are conducted, and the other passages are not connected to each other; or the second passage 202 and the third passage 203 are conducted, the fifth passage 205 and the sixth passage 206 are conducted, the seventh passage 207 and the eighth passage 208 are conducted, the tenth passage 2010 and the twelfth passage 2012 are conducted, and the other passages are not connected to each other; or the second passage 202 and the third passage 203 are conducted, the fourth passage 204 and the fifth passage 205 are conducted, the seventh passage 207 and the eighth passage 208 are conducted, the tenth passage 2010 and the twelfth passage 2012 are conducted, and the other passages are not connected to each other. The twelve-way valve 2 also includes other conduction schemes, which are not limited in this disclosure.

[0046] It can be seen from Figure 1 that the first connection port 301, the third connection port 303, and the fourth connection port 304 of the four-way valve 3 are connected to the battery pack 6 circuit, and the second connection port 302 is connected to the twelve-way valve 2. The partial conduction schemes of the four-way valve 3 are as follows: The second connection port 302 is conducted with the fourth connection port 304, and the other connection ports are not connected to each other; the first connection port 301 is conducted with the fourth connection port 304, and the other connection ports are not connected to each other; the third connection port 303 is conducted with the fourth connection port 304, and the other connection ports are not connected to each other; the first connection port 301 is conducted with the second connection port 302 and the fourth connection port 304, and the other connection ports are not connected to each other; the first connection port 301 is conducted with the third connection port 303 and the fourth connection port 304, and the other connection ports are not connected to each other. In the actual scheme, due to the flexible application of the three-way pipe 4, various components and pipeline forms can be used for substitution.

[0047] Meanwhile, the battery cooler 5 and the water-cooled condenser 8 share the refrigerant circuit 1. Specifically, it can be seen in Figure 1 the dashed-line part connected to the water-cooled condenser 8 and the dashed-line part connected to the battery cooler 5 in the figure, which are both refrigerant pipelines of the air conditioner / heat pump system. The specific form of the refrigerant pipeline is not within the scope of this patent.

[0048] In Figure 1 it, multiple electric water pumps 14 are provided, which are respectively arranged in the heating circulation circuit, the drive motor 12 circuit and the battery pack 6 circuit. In the actual solution, the number and position of the electric water pumps 14 can be appropriately adjusted without being Figure 1 exactly the same as the number and position of the electric water pumps 14 in

[0049] Through the thermal management system shown in Figure 1 , it is possible to realize a thermal management system for pure electric vehicles mainly based on coolant circulation only by relying on two valve bodies, namely the twelve-way valve 2 and the four-way valve 3. Thus, all the R290 thermal management function requirements of the whole vehicle except the heat exchanger in the passenger compartment air-conditioning box can be realized. At the same time, in this solution, different heat sources can be used to achieve heat pump heating under different environments and working conditions, including the drive motor 12, the external environment, the battery and the heat generated by the compressor. Moreover, the development difficulty of the air conditioner / heat pump system can be reduced, and the heating function of the passenger compartment can be realized by borrowing the traditional air-conditioning system of other vehicle models.

[0050] Based on different requirements, the thermal management system provided by this application can achieve different thermal management strategies by controlling the conduction schemes of the twelve-way valve 2 and the four-way valve 3. Below, in combination with the drawings, the thermal management system circuits and the coolant flow directions corresponding to several thermal management strategies will be exemplarily described.

[0051] In one embodiment, when air conditioning cooling and battery cooling are required, the one shown in Figure 2The thermal management strategy shown. At this time, the second passage 202 and the third passage 203 of the twelve-way valve 2 are connected, the fifth passage 205 and the sixth passage 206 are connected, the seventh passage 207 and the eighth passage 208 are connected, the tenth passage 2010 and the twelfth passage 2012 are connected, and the other passages are not connected to each other. At this time, the coolant flowing out of the radiator 11 outlet directly flows into the water-cooled condenser 8 to cool the refrigerant pipeline. The coolant flowing out of the heater 9 outlet and the coolant flowing out of the drive motor 12 outlet are mixed by the three-way pipe 4, and then returned to the heat dissipation circulation loop through the overflow tank 10, and part of the coolant is directly used for cooling the high-voltage components 13 and the drive motor 12; the other part of the coolant flows into the water-cooled condenser 8 again after cooling through the radiator 11. On the other hand, part of the low-temperature coolant flowing out of the battery cooler 5 outlet flows to the air conditioning core 7 for passenger compartment cooling, and the other part is mixed with the self-circulating coolant of the battery pack 6 through the four-way valve 3 to form a sub-low temperature coolant to cool the battery pack 6; when the battery pack 6 has no cooling demand, the four-way valve 3 can be adjusted to close the flow of the third connection port 303. At this time, in the battery pack 6 circuit, the coolant forms a self-circulation from the battery to the four-way valve 3, and then flows into the battery pack 6 again. When the air conditioner has no cooling demand, the electronic water pump 14 connected to the air conditioning core 7 is turned off, and the four-way valve 3 is adjusted to the third connection port 303 and the fourth connection port 304 to the conductive state. Thus, a coolant circuit is formed in which the coolant flows through the battery pack 6, flows through the battery cooler 5, the four-way valve 3, and finally flows back to the battery pack 6, thereby realizing the separate cooling of the battery pack 6.

[0052] In one embodiment, when the ambient temperature is too high or the water temperature of the high voltage component 13 or the drive motor 12 is overheated, the following method can be used: Figure 3The thermal management strategy shown. At this time, the second passage 202 and the third passage 203 of the twelve-way valve 2 are connected, the fourth passage 204 and the fifth passage 205 are connected, the seventh passage 207 and the eighth passage 208 are connected, the tenth passage 2010 and the twelfth passage 2012 are connected, and the other passages are not connected to each other. At this time, a part of the coolant flowing out of the radiator 11 outlet flows to the heating circulation loop through the third passage 203 of the twelve-way valve 2, passes through the water-cooled condenser 8 and the heater 9, and is mixed with the coolant flowing out of the drive motor 12, and then returns to the heat dissipation circulation loop again through the overflow tank 10. After the coolant is cooled by the radiator 11, a part of it continues to flow to the heating circulation loop, and a part of it flows to the drive motor 12 circuit. On the other hand, part of the low-temperature coolant flowing out of the battery cooler 5 outlet flows to the air conditioning core 7 for passenger compartment cooling, and the other part is mixed with the self-circulating coolant of the battery pack 6 through the four-way valve 3 to form a sub-low temperature coolant to cool the battery pack 6; when the battery pack 6 has no cooling demand, the four-way valve 3 can be adjusted to close the flow of the third connection port 303. At this time, in the battery pack 6 circuit, the coolant forms a self-circulation from the battery to the four-way valve 3, and then flows into the battery pack 6 again. When the air conditioner has no cooling demand, the electronic water pump 14 connected to the air conditioning core 7 is turned off, and the four-way valve 3 is adjusted to the third connection port 303 and the fourth connection port 304 to the conductive state. Thus, a coolant circuit is formed in which the coolant flows through the battery pack 6, flows through the battery cooler 5, the four-way valve 3, and finally flows back to the battery pack 6, thereby realizing the separate cooling of the battery pack 6. When the ambient temperature is high or the water temperature of the high-voltage components 13 and the drive motor 12 is overheated, the thermal management system provided in the present application can cool the water-cooled condenser 8, the high-voltage components 13, and the drive motor 12 at the same time through the radiator 11, thereby improving the cooling efficiency and ensuring that each component can operate at an ideal temperature.

[0053] In one embodiment, when the vehicle is in a low temperature environment, the following Figure 4The thermal management strategy shown in FIG. 1 is that at this time, the first passage 201 and the second passage 202 of the twelve-way valve 2 are connected, the fifth passage 205 and the sixth passage 206 are connected, the seventh passage 207 and the ninth passage 209 are connected, the tenth passage 2010 and the eleventh passage 2011 are connected, and the other passages are not connected to each other. In order to meet the heating needs of the driver, the coolant in the heat dissipation circuit will no longer pass through the radiator 11. The coolant flowing out of the overflow tank 10 will reach the high-voltage components 13 and the drive motor 12 through the sixth passage 206 and the fifth passage 205. The coolant with increased temperature will then pass through the battery cooler 5 and return to the overflow tank 10 to form a loop. The air conditioning system absorbs the waste heat of the high-voltage components 13 and the drive motor 12 through the battery cooler 5 to heat the refrigerant. After the refrigerant with a higher temperature flows to the water-cooled condenser 8, it will release the heat to the heating cycle, thereby realizing the heat pump heating function under low temperature conditions. If the battery needs to be heated simultaneously, the four-way valve 3 is controlled to adjust the opening ratio between the first connection port 301 and the second connection port 302. At this time, the electronic water pump 14 set in the battery pack 6 circuit will extract the coolant with a higher temperature flowing out of the heater 9 in the heating circulation circuit into the battery pack 6 circuit, thereby meeting the battery heating demand. The opening ratio between the first connection port 301 and the second connection port 302 can control the flow ratio of the low-temperature coolant and the high-temperature coolant in the battery pack 6 circuit, thereby achieving different water temperature target requirements; when the battery pack 6 does not need to be heated, the four-way valve 3 can be controlled to be connected to the first connection port 301 and the fourth connection port 304. At this time, the electronic water pump 14 can no longer extract the coolant with a higher temperature from the heating circulation circuit through the second connection port 302, thereby stopping the supply of high-temperature coolant in the battery pack 6 circuit. When the temperature is low, the thermal management system provided in the present application releases heat to heating through the water-cooled condenser 8, which can realize the heat pump heating and battery heating functions under low temperature conditions, reducing the waste of resources. At the same time, by adjusting the opening of the four-way valve 3, the functions of turning on, off and adjusting the battery heating can be accurately realized.

[0054] In one embodiment, when the vehicle is in a low temperature environment and the heating demand is high, the following method can be used: Figure 5The thermal management strategy shown in the figure, at this time, the heat absorption capacity of the battery cooler 5 is greatly increased, so the coolant temperature in the drive motor 12 circuit will be lower than the ambient temperature. At this time, the twelve-way valve 2 can be switched to a connection scheme in which the first passage 201 and the second passage 202 are connected, the fourth passage 204 and the fifth passage 205 are connected, the seventh passage 207 and the ninth passage 209 are connected, the tenth passage 2010 and the eleventh passage 2011 are connected, and the other passages are not connected to each other. At this time, after the coolant flows out of the overflow pipe, it passes through the radiator 11, the fourth passage 204 and the fifth passage 205, and passes through the high-voltage components 13 and the drive motor 12, and the temperature rises. In this process, when the coolant flows through the radiator 11, it absorbs ambient heat through the radiator 11, so compared with Figure 4 Before flowing into the high voltage component 13, the temperature of the coolant is higher. After the temperature of the coolant is absorbed by the battery cooler 5, it will return to the overflow tank 10, thus forming a loop. Figure 4 The mode is the same and will not be described again. When the heating demand of the air conditioner is very high, the thermal management system provided by the present application can absorb ambient heat through the radiator 11 for use by the heat pump system, thereby reducing the waste of resources used for heating.

[0055] In one embodiment, when the thermal management strategy corresponding to the thermal management system is a mode in which the heating demand of the air conditioner is very low, such as in spring and autumn, at this time, even if the heat pump (including the compressor and the battery cooler 5) is in the lowest power operation state, it is still higher than the heating demand of the passenger compartment, and the twelve-way valve 2 can be switched to Figure 6The second passage 202, the third passage 203, the fourth passage 204, the fifth passage 205, the seventh passage 207, the ninth passage 209, the tenth passage 2010, and the eleventh passage 2011 shown are conducting, and other passages are not conducting with each other. At this time, the four-way valve 3 maintains the state where the first connection port 301 and the fourth connection port 304 are conducting, which can prevent the coolant with a higher temperature in the heating circulation loop from flowing into the battery pack 6 loop. After the coolant flows out of the overflow tank 10, it is cooled by the radiator 11. The low-temperature coolant side will flow through the high-voltage components 13 and the drive motor 12 through the fourth passage 204 and the fifth passage 205. The heated coolant flows back to the overflow tank 10 after being mixed with the coolant flowing out of the heater 9 after passing through the battery cooler 5. When the coolant flows through the battery cooler 5, the temperature of the coolant decreases and the temperature of the refrigerant increases. The coolant flowing out of the radiator 11 on the other side is used to cool the water-cooled condenser 8 after passing through the third passage 203 and the second passage 202, and is mixed with the coolant flowing out of the battery cooler 5 after passing through the heater 9. At this time, the battery pack 6 loop forms a self-circulation. That is to say, when the external ambient temperature is lower than the heat pump temperature and the heating demand is low, the thermal management system disclosed in this application not only absorbs the heat in the coolant through the battery cooler 5 for air-conditioning heating, but also dissipates heat with a small power to the water-cooled condenser 8 through the radiator 11 to achieve the purpose of saving resources.

[0056] In one embodiment, during air-conditioning heating, if the battery just has a cooling requirement, it can be switched to the Figure 7 thermal management system loop shown. At this time, the first passage 201 and the second passage 202 of the twelve-way valve 2 are conducting, the fifth passage 205 and the sixth passage 206 are conducting, the seventh passage 207 and the eighth passage 208 are conducting, the tenth passage 2010 and the eleventh passage 2011 are conducting, and other passages are not conducting with each other. Figure 7It can be known that the twelfth passage 2012 of the twelve-way valve 2 is not conducting, the second valve 16 for controlling the opening and closing of the coolant pipeline between the heating circulation loop and the battery pack 6 loop is open, the fourth valve 18 for controlling the opening and closing of the coolant pipeline between the battery cooler 5 and the heat dissipation circulation loop is closed, and the third connection port 303 and the fourth connection port 304 of the four-way valve 3 are conducting. At this time, the battery pack 6 can be cooled by the battery cooler 5; when the tenth passage 2010 and the eleventh passage 2011 of the twelve-way valve 2 are conducting, the heat of the battery cooler 5 is released to the heating circulation loop through the water-cooled condenser 8. Specifically, at this time, the coolant flowing out of the overflow tank 10 enters the drive motor 12 loop through the sixth passage 206 and the fifth passage 205, and after absorbing the heat of the drive motor 12, it returns to the overflow tank 10 through the seventh passage 207 and the eighth passage 208 to form a cycle. In the battery pack 6 loop, at this time, the four-way valve 3 is in a state where the third connection port 303 and the fourth connection port 304 are conducting and the other connection ports are not communicating with each other. At this time, the high-temperature coolant flowing through the battery pack 6 is cooled by the battery cooler 5 and then flows back to the battery pack 6 through the four-way valve 3 to form a loop. When the coolant flows through the battery cooler 5, the coolant is cooled and the refrigerant is heated. Therefore, the refrigerant temperature corresponding to the water-cooled condenser 8 in the heating circulation loop is relatively high, thereby realizing air-conditioning heating. After the coolant flows out of the water-cooled condenser 8, it passes through the heater 9 and the air-conditioning core 7 and then flows back to the water-cooled condenser 8 to form the coolant loop in the heating circulation loop. That is to say, during the air-conditioning heating process, if the battery just has a cooling requirement, the thermal management system provided by the present application cools the battery through the battery cooler 5, and at the same time releases the battery heat to the heating loop through the water-cooled condenser 8 of the air-conditioning system to realize air-conditioning heating; at this time, the high-voltage components 13 and the drive motor 12 are in a self-circulating heat preservation state, thereby saving the resource consumption corresponding to air-conditioning heating and cooling the battery.

[0057] Furthermore, Figure 7 in the corresponding thermal management system loop, when the water temperature of the drive motor 12 loop gradually increases, it can be switched to Figure 8Corresponding to the thermal management system circuit, at this time, the fifth passage 205 and the sixth passage 206 of the twelve-way valve 2 are connected, the seventh passage 207 and the ninth passage 209 are connected, the tenth passage 2010 and the eleventh passage 2011 are connected, and the other passages are not connected to each other. At this time, the coolant flowing out of the overflow tank 10 passes through the sixth passage 206 and the fifth passage 205 to cool the high-voltage components 13 and the drive motor 12, and then mixes with the high-temperature coolant flowing through the battery pack 6, and then flows through the battery cooler 5 to cool down. Part of the coolant flows back to the overflow tank 10 after cooling, and the other part of the coolant flows back to the battery pack 6 circuit to continue to cool the battery pack 6. At this time, after the battery cooler 5 absorbs the heat in the drive motor 12 circuit and the battery pack 6 circuit, the refrigerant temperature rises, thereby transferring the heat from the drive motor 12 circuit and the battery pack 6 circuit to the heating circulation circuit.

[0058] In one embodiment, in a low temperature environment after the air conditioner is turned off, the Figure 8 Corresponding to the thermal management system circuit, the flow direction of the coolant circuit has not changed, but only the heat dissipation circulation circuit, the drive motor 12 circuit and the battery pack 6 circuit remain. At this time, the drive motor 12 can realize the function of heating the battery. Specifically, when the air conditioner is turned off, the ability of the battery cooler 5 to absorb heat is reduced, thereby ensuring that the temperature of the battery pack 6 is in the ideal temperature range. In other words, the thermal management system provided by this application is Figure 8 When the motor heating battery function is implemented in the coolant circuit shown, the battery can be heated by relying on the motor waste heat during driving, and the battery can also be heated by the motor's active heat generation function.

[0059] In one embodiment, when the ambient temperature is extremely low, the driver will have a higher heating demand, but at this time the vehicle's heat pump system can no longer start normally and absorb the heat in the coolant through the battery cooler 5. At this time, the thermal management system can switch to Figure 9The coolant circuit shown. At this time, the first passage 201 and the second passage 202 of the twelve-way valve 2 are connected, the fifth passage 205 and the sixth passage 206 are connected, the seventh passage 207 and the eighth passage 208 are connected, the tenth passage 2010 and the eleventh passage 2011 are connected, and the other passages are not connected to each other. At this time, the heat-generating function of the compressor is turned on to pressurize and heat the refrigerant in the refrigerant circuit 1. At this time, the temperature of the refrigerant with a higher temperature decreases after passing through the water-cooled condenser 8, and the temperature of the coolant increases, thereby transferring heat to the heating circulation circuit. After the coolant flowing out of the water-cooled condenser 8 passes through the heater 9, a part of it returns to the heating circulation circuit through the eleventh passage 2011 and the tenth passage 2010, and returns to the water-cooled condenser 8 after passing through the air-conditioning core 7. The other part enters the battery pack 6 circuit through the second connection port 302 of the four-way valve 3, thereby heating the battery pack 6. After part of the coolant flows out of the battery pack 6, it returns to the battery pack 6 through the first connection port 301, and the other part of the coolant returns to the heating circulation loop through the first passage 201 and the second passage 202. At this time, the coolant forms a self-circulation in the drive motor 12 circuit and the heat dissipation circulation loop. At this time, the heat of the compressor can be used for air conditioning heating and battery heating at the same time. When the battery is heated, the four-way valve 3 switches to a state where the first connection port 301 and the fourth connection port 304 are connected, thereby preventing the hot water in the heating circuit from flowing into the battery pack 6 circuit again.

[0060] In one embodiment, when the ambient temperature is low and the air conditioner is turned off, if the battery needs to be cooled (e.g., in a low-temperature fast-charging condition), the thermal management system can be switched to the following: Figure 10 In the coolant circuit shown in FIG. 1 , the second passage 202 and the third passage 203 of the twelve-way valve 2 are connected, the fourth passage 204 and the fifth passage 205 are connected, the seventh passage 207 and the ninth passage 209 are connected, the tenth passage 2010 and the eleventh passage 2011 are connected, and the other passages are not connected. Figure 10 The electronic water pump 14 disposed between the air conditioning core 7 and the water-cooled condenser 8 is turned off, so there is no coolant flow in the heating circulation loop in this mode. At this time, the coolant flows out of the overflow tank 10, is cooled by the radiator 11, and then flows through the high-voltage components 13 and the drive motor 12 through the fourth passage 204 and the fifth passage 205. At this time, the coolant heats up, and the lower-temperature coolant flowing out of the drive motor 12 circuit mixes with the high-temperature coolant in the battery pack 6 circuit, and the overall coolant temperature in the battery pack 6 circuit decreases. After the coolant flows through the battery cooler 5, due to the low ambient temperature and the air conditioner being turned off, the battery cooler 5 has a poor ability to absorb heat. At this time, part of the coolant flows back to the battery pack 6 circuit and continues to be used for cooling the battery pack 6, and the other part of the coolant flows back to the radiator 11 for cooling. In the case of Figure 10In the shown coolant circuit, at this time, the radiator 11 mainly provides cooling capacity for the battery to achieve a battery cooling function with lower energy consumption.

[0061] It should be noted that when switching the coolant circuit of the thermal management system in each embodiment of the present application, it is achieved by controlling the conduction modes of the twelve-way valve 2 and the four-way valve 3, and controlling the opening and closing of multiple closable circuits, so as to correspond to different modes of thermal management strategies. When switching the thermal management strategy, it is necessary to collect the temperatures of various components (such as the battery pack 6 and the drive motor 12), the air-conditioning temperature set by the driver, and the external temperature, and automatically switch the thermal management strategy according to the above temperature information. For example, Figure 7 In the shown thermal management strategy, at this time, the battery has a cooling requirement and the air conditioner is heating. That is to say, at this time, the air-conditioning temperature set by the driver is higher than the ambient temperature, and the temperature of the battery pack 6 is higher than the preset temperature threshold (such as the ideal temperature range). If the above conditions are met, then switch to as Figure 7 shown in the coolant circuit of the thermal management system. When adopting Figure 7 the shown thermal management strategy for a long time, if the temperature of the drive motor 12 is too high, such as higher than another preset temperature threshold, then the coolant circuit of the thermal management system will be switched from Figure 7 to Figure 8 as shown.

[0062] On this basis, when switching the coolant circuit, it can be set to ensure that each temperature condition is met, and after continuously meeting the above temperature conditions within a preset time period, the thermal management strategy will be switched to prevent frequent switching caused by fluctuations of the temperatures of various components or the environment near the endpoints of the preset temperature range. Among them, the maintenance time can be set by the staff, such as 3s, 5s, 10s, etc. If after the temperature conditions are met, it is monitored that the temperature of a certain component rises rapidly, then quickly switch the thermal management strategy. Still taking the Figure 7 switch to Figure 8 process as an example, if the temperature of the drive motor 12 rises rapidly in a short time after being higher than the preset temperature threshold, at this time, it may no longer be necessary to ensure that the temperature of the drive motor 12 is higher than the preset temperature threshold during this period to prevent the shortening of the motor life due to the too high temperature of the drive motor 12.

[0063] In one embodiment, the refrigerant used in the refrigerant pipelines of the above embodiments can be R290, so as to ensure the functional requirements of the thermal management system. In addition, other refrigerants similar to R290 with flammability but higher economic benefits and stronger cooling capacity can also be used. The types of refrigerants used in the refrigerant pipelines are not limited herein. At the same time, in necessary cases, R134a and R1234yf in the prior art can also be used as refrigerants.

[0064] In one embodiment, the opening ratio of the four-way valve 3 in the thermal management system provided by the present application can be adjusted. Generally, when the first connection port 301 is connected with the second connection port 302 and the fourth connection port 304, and the other connection ports are not connected to each other, the opening ratio between the first connection port 301 and the second connection port 302 can be adjusted. At this time, if the opening ratio of the second connection port 302 is increased, the amount of coolant flowing into the battery pack 6 circuit in the heating circulation loop will increase. When the first connection port 301 is connected with the third connection port 303 and the fourth connection port 304, and the other connection ports are not connected to each other, the opening ratio between the first connection port 301 and the third connection port 303 can be adjusted. At this time, if the opening ratio corresponding to the third connection port 303 is increased, the amount of coolant in the battery pack 6 circuit that is cooled by the battery cooler 5 will increase. In the thermal management system provided by the present application, the flow rate of the coolant can be adjusted by adjusting the opening ratio between different connection ports in the four-way valve 3, so as to achieve the purpose of precise cooling.

[0065] In one embodiment, the twelve-way valve 2 in the thermal management system provided by the present application can also be replaced by an eleven-way valve, such as Figure 11 As shown, the corresponding thermal management functions and modes remain unchanged. When implementing different thermal management strategies, they can be turned on in a similar way. At the same time, the twelve-way valve 2 and four-way valve 3 provided in this application can be functionally replaced by other single or multiple valve bodies. This application does not limit the valve body of functional replacement, nor does it limit the types and control signals of the twelve-way valve 2 and four-way valve 3 in this application. In addition, the number and position of the electronic water pump 14 in the figure can be adjusted appropriately; the front and back order between the heater 9 and the water-cooled condenser 8, the electronic water pump 14 and the air-conditioning core 7 in the heating circulation loop is not required. The heater 9 and the water-cooled condenser 8 are in series, and can also be connected in parallel; the drive motor 12 and the high-voltage components 13 can change the front and back positions, or they can be connected in parallel. If other components have cooling requirements, they can be placed in any position in this solution according to the specific heat exchange requirements while keeping the existing functional solutions intact.

[0066] It can be seen from the above embodiments that the thermal management system provided by the present application realizes all R290 thermal management function requirements of the vehicle except the heat exchanger in the passenger compartment air conditioning box by relying on only two valve bodies, the twelve-way valve 2 and the four-way valve 3. At the same time, the present solution can realize heat pump heating in different environments and working conditions using different heat sources, including drive motor 12, external environment, battery and compressor heat generation. In addition, the present solution can reduce the difficulty of developing air conditioning / heat pump systems, and can realize the passenger compartment heating (heat pump) function by using the traditional air conditioning systems of other models.

[0067] An embodiment of the present application also provides a vehicle, comprising the thermal management system as described above.

[0068] Each embodiment in this application is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key points of each embodiment are the differences from other embodiments. In particular, for the device and medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for the relevant parts, reference can be made to the partial description of the method embodiments.

[0069] The devices and media provided in the embodiments of this application correspond one by one to the methods. Therefore, the devices and media also have beneficial technical effects similar to those of their corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the devices and media will not be elaborated here.

[0070] Those skilled in the art should understand that the embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0071] This application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of this application. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, as well as the combination of flows and / or blocks in the flowchart and / or block diagram. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in Figure 1 one or more of the processes or multiple processes and / or blocks Figure 1 one or more of the blocks or multiple blocks.

[0072] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the specified functions in Figure 1 one or more of the processes or multiple processes and / or blocks Figure 1 one or more of the blocks or multiple blocks.

[0073] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 steps of the functions specified in one block or multiple blocks.

[0074] In a typical configuration, a computing device includes one or more processors (CPUs), an input / output interface, a network interface, and memory.

[0075] The memory may include non-permanent memory in the computer-readable medium, in the form of random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

[0076] Computer-readable media includes permanent and non-permanent, removable and non-removable media and can store information by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

[0077] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of another identical element in the process, method, commodity or device comprising the element.

[0078] Among them, the beneficial effects of the above embodiments can refer to the beneficial effects in the corresponding methods provided above, which will not be elaborated here.

[0079] From the description of the above embodiments, those skilled in the art can understand that for the convenience and brevity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0080] In the embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be electrical, mechanical or other forms.

[0081] In the description of the present disclosure, it should be understood that if terms such as "upper", "lower", "front", "rear", "left" and "right" are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure.

[0082] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A thermal management system, characterized in that: include: A refrigerant circuit, a heating circuit, a heat dissipation circuit, a drive motor circuit, and a battery pack circuit interconnected by a twelve-way valve, a four-way valve, and a plurality of three-way pipes; The battery pack circuit includes a battery cooler and a battery pack; The heating circulation loop includes an air conditioning core, a water-cooled condenser and a heater; The battery cooler and the water-cooled condenser share the refrigerant circuit; The twelve-way valve and the four-way valve have multiple conduction modes, and the flow direction of the coolant is different under different conduction modes.

2. The thermal management system according to claim 1, characterized in that: The thermal management system further comprises at least one of the following valves: A first valve for controlling the opening and closing of the coolant pipeline between the air-conditioning core and the water-cooled condenser, a second valve for controlling the opening and closing of the coolant pipeline between the heating circulation loop and the battery pack circuit, a third valve for controlling the opening and closing of the coolant pipeline between the heating circulation loop and the heat dissipation circulation loop; a fourth valve for controlling the opening and closing of the coolant pipeline between the battery cooler and the heat dissipation circulation loop, and a fifth valve for controlling the opening and closing of the coolant pipeline between the battery pack and the battery cooler.

3. The thermal management system according to claim 1, characterized in that: The first passage of the twelve-way valve is connected to the first connection port of the four-way valve and the battery pack circuit through a three-way pipe; the second passage of the twelve-way valve is connected to the air-conditioning core and the water-cooled condenser through a three-way pipe; the third passage and the fourth passage of the twelve-way valve are connected to the radiator in the heat dissipation circulation circuit through the same three-way pipe; the sixth passage of the twelve-way valve is connected to the radiator in the heat dissipation circulation circuit and the overflow tank through a three-way pipe; the fifth passage and the seventh passage of the twelve-way valve are respectively connected to the two ends of the drive motor circuit; the eighth passage of the twelve-way valve is connected to the first A three-way pipe is connected to the second three-way pipe, one end of the first three-way pipe is connected to the heater and the eleventh passage of the twelve-way valve respectively through the third three-way pipe; the other end is connected to the second connecting port of the four-way valve; one end of the second three-way valve is connected to the overflow tank in the heat dissipation circulation loop, and the other end is connected to the third connecting port of the four-way valve, the battery cooler and the twelfth passage of the twelve-way valve through the three-way pipe; the ninth passage of the twelve-way valve is connected to the battery pack circuit through the three-way pipe; the tenth passage of the twelve-way valve is connected to the air-conditioning core in the heating circulation loop.

4. The thermal management system according to claim 1, characterized in that: The conduction mode of the twelve-way valve includes at least one of the following conduction modes: The second path and the third path are connected, the fourth path and the fifth path are connected, the seventh path and the ninth path are connected, the tenth path and the eleventh path are connected, and the other paths are not connected to each other; The first path and the second path are connected, the fourth path and the fifth path are connected, the seventh path and the ninth path are connected, the tenth path and the eleventh path are connected, and the other paths are not connected to each other; The first path and the second path are connected, the fifth path and the sixth path are connected, the seventh path and the eighth path are connected, the tenth path and the eleventh path are connected, and the other paths are not connected to each other; The fifth path and the sixth path are connected, the seventh path and the ninth path are connected, the tenth path and the eleventh path are connected, and the other paths are not connected to each other; The first path and the second path are connected, the fifth path and the sixth path are connected, the seventh path and the ninth path are connected, the tenth path and the eleventh path are connected, and the other paths are not connected to each other; The second path and the third path are connected, the fifth path and the sixth path are connected, the seventh path and the eighth path are connected, the tenth path and the twelfth path are connected, and the other paths are not connected to each other; The second path and the third path are connected, the fourth path and the fifth path are connected, the seventh path and the eighth path are connected, the tenth path and the twelfth path are connected, and the other paths are not connected to each other.

5. The thermal management system according to claim 1, characterized in that: The conduction mode of the four-way valve includes at least one of the following conduction modes: The second connection port is connected to the fourth connection port, and the other connection ports are not connected to each other; The first connection port is connected to the fourth connection port, and the other connection ports are not connected to each other; The third connection port is connected to the fourth connection port, and the other connection ports are not connected to each other; The first connection port is connected to the second connection port and the fourth connection port, and the other connection ports are not connected to each other; The first connection port is connected to the third connection port and the fourth connection port, and the other connection ports are not connected to each other.

6. The thermal management system according to claim 1, characterized in that: When the tenth passage and the twelfth passage of the twelve-way valve are connected, and the first valve for controlling the coolant pipeline between the air-conditioning core and the water-cooled condenser is closed, and the second valve for controlling the coolant pipeline between the air-conditioning core and the battery cooler is opened, the battery cooler cools the air-conditioning core through the twelfth passage and the tenth passage.

7. The thermal management system according to claim 1, characterized in that: When the second passage and the third passage of the twelve-way valve are connected, the water-cooled condenser is cooled through the heat dissipation circulation loop; When the fourth passage and the fifth passage of the twelve-way valve are connected, the drive motor circuit is cooled through the heat dissipation circulation circuit.

8. The thermal management system according to claim 1, characterized in that: When the fifth passage of the twelve-way valve is connected to the sixth passage and the seventh passage is connected to the ninth passage, the heat in the drive motor circuit is absorbed by the battery cooler; When the first passage is connected to the second passage and the tenth passage is connected to the eleventh passage, the water-cooled condenser absorbs heat from the battery cooler through the refrigerant circuit.

9. The thermal management system according to claim 1, characterized in that: When the fourth passage of the twelve-way valve is connected to the fifth passage, the seventh passage is connected to the ninth passage, and the coolant temperature in the drive motor circuit is lower than the ambient temperature, the ambient heat is absorbed by the battery cooler; When the first passage and the second passage of the twelve-way valve are in communication, and the tenth passage and the eleventh passage are in communication, the water-cooled condenser absorbs heat from the battery cooler through a refrigerant circuit.

10. The thermal management system according to claim 1, characterized in that: When the fourth passage of the twelve-way valve is connected to the fifth passage, and the seventh passage is connected to the ninth passage, the heat of the drive motor circuit is absorbed by the battery cooler; When the second passage and the third passage of the twelve-way valve are connected, the tenth passage and the eleventh passage are connected, and the set temperature of the air conditioner is lower than the preset threshold, the heat is dissipated from the water-cooled condenser through the heat dissipation circulation circuit, and the heat of the battery cooler is absorbed through the refrigerant circuit for air conditioning heating.

11. The thermal management system according to claim 1, characterized in that: When the twelfth passage of the twelve-way valve is not connected, the second valve for controlling the opening and closing of the coolant pipeline between the heating circulation loop and the battery pack circuit is opened, the fourth valve for controlling the opening and closing of the coolant pipeline between the battery cooler and the heat dissipation circulation loop is closed, and the third connection port and the fourth connection port of the four-way valve are connected, the battery pack is cooled by the battery cooler; When the tenth passage and the eleventh passage of the twelve-way valve are connected, the heat of the battery cooler is released to the heating circulation loop through the water-cooled condenser.

12. The thermal management system according to claim 1, characterized in that: When the fifth passage and the sixth passage of the twelve-way valve are connected, the seventh passage and the ninth passage are connected, and the motor circuit coolant temperature is higher than a preset threshold, the battery pack circuit is heated through the drive motor circuit, and the battery cooler absorbs heat from the battery pack and the drive motor circuit at the same time; When the tenth passage and the eleventh passage of the twelve-way valve are connected, the heat of the battery cooler is released to the heating circulation loop through the water-cooled condenser.

13. The thermal management system according to claim 1, characterized in that: When the fourth passage and the fifth passage of the twelve-way valve are connected, the seventh passage and the ninth passage are connected, and the ambient temperature is lower than a preset threshold, the battery pack circuit is cooled through the heat dissipation circulation circuit.

14. A vehicle, characterized in that: A thermal management system comprising the thermal management system as claimed in any one of claims 1 to 13.

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