Nine-way valve thermal management system and hybrid vehicle

Abstract

The application provides a kind of thermal management system for the technical field of vehicle thermal management, specifically a nine-way valve thermal management system, comprising an electric drive cooling circuit for actively cooling or passively cooling the electric drive system;Battery circuit for cooling or heating battery pack;Water heating circuit for heating the passenger compartment;Battery heat exchanger for actively cooling the electric drive system and battery pack;Nine-way valve for controlling the communication / disconnection of the electric drive cooling circuit, battery circuit, water heating circuit and battery heat exchanger to form different circuits.The above-mentioned nine-way valve thermal management system introduces the electric drive active cooling mode and the battery passive cooling mode, solves the problem of motor over-temperature torque limiting and the lack of low-temperature battery active cooling function, effectively reduces the specification and fan power demand of low-temperature radiator, and ensures the normal operation of the vehicle cooling system.The application also provides a hybrid vehicle comprising the above-mentioned nine-way valve thermal management system.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a nine-way valve thermal management system and a hybrid vehicle. Background Technology

[0002] Current hybrid vehicles increasingly prioritize pure electric range. However, in severe off-road scenarios, issues such as motor overheating and torque limitation can lead to insufficient vehicle power. Additionally, in low-temperature environments, existing hybrid vehicles experience difficulties in compressor oil return, hindering the establishment of pressure differentials and resulting in a lack of active battery cooling, which in turn causes battery overheating. Furthermore, the insufficient cooling performance of current hybrid vehicles necessitates increasing fan size and employing low-temperature radiators to improve airflow and cooling efficiency. Consequently, these low-temperature radiators and fans are becoming increasingly larger, excessively occupying interior space. Utility Model Content

[0003] In view of this, this application provides a nine-way valve thermal management system and a hybrid vehicle. By optimizing the architecture and adding a nine-way valve as a means of switching between various cooling modes, it introduces an active cooling mode for electric drive and a passive cooling mode for the battery. This solves the problems of motor over-temperature torque limitation and lack of active cooling function for low-temperature battery, effectively reduces the selection specifications of low-temperature radiators and fan power requirements, and ensures the normal operation of the vehicle cooling system.

[0004] To achieve the above objectives, this application provides the following technical solution: A nine-way valve thermal management system, comprising: This technology is applied to hybrid vehicles, which include an electric drive system, a battery pack, and a passenger compartment. The nine-way valve thermal management system includes: An electric drive cooling circuit is used to actively or passively cool the electric drive system. A battery circuit is used for cooling or heating the battery pack; A water-heating circuit is used to heat the passenger compartment; A battery heat exchanger for actively cooling the electric drive system and the battery pack; A nine-way valve is used to control the connection / disconnection of the electric drive cooling circuit, the battery circuit, the water heating circuit, and the battery heat exchanger to form different circuits, so as to at least realize the mode of active cooling of the electric drive system under the condition of motor over-temperature and torque limitation, and the mode of active cooling of the battery pack under low temperature environment; wherein the fluid medium that can realize heat exchange flows in each circuit.

[0005] The nine-way valve thermal management system of this application optimizes the architecture by adding a nine-way valve as a means of switching between various cooling modes, and introduces an active cooling mode for electric drive and a passive cooling mode for battery. This solves the problems of motor over-temperature torque limitation and lack of active cooling function for low-temperature battery, effectively reduces the selection specifications of low-temperature radiators and fan power requirements, and ensures the normal operation of the vehicle cooling system.

[0006] Optionally, two of the nine ports of the nine-way valve are connected to the battery circuit; the other two ports of the nine-way valve are connected to the water heating circuit; the remaining two ports of the nine-way valve are connected to the battery heat exchanger; and the other three ports of the nine-way valve are connected to the electric drive cooling circuit.

[0007] By switching the connection mode between the ports inside the nine-way valve, the connection / disconnection between the electric drive cooling circuit, battery circuit, water heating circuit, and battery heat exchanger can be switched to achieve different cooling and heating modes.

[0008] Optionally, the electric drive cooling circuit includes: a low-temperature radiator, an electric drive water pump, a three-way valve, a front drive bridge, and a rear drive bridge, wherein the front drive bridge and the rear drive bridge are connected in parallel and then connected in series with the electric drive water pump.

[0009] The front drive bridge and rear drive bridge in the electric drive cooling circuit can be passively cooled by a low-temperature radiator, or they can be actively cooled by the battery heat exchanger after the electric drive cooling circuit is connected to the battery heat exchanger.

[0010] Optionally, the electric drive cooling circuit is further provided with an intercooler condenser, which is connected in parallel with the front drive bridge and the rear drive bridge.

[0011] The intercooler condenser is connected in parallel with the front drive bridge and the rear drive bridge, and a three-way valve is installed at both the inlet and outlet of the intercooler condenser. This allows for selective cooling of the intercooler condenser while cooling the front drive bridge and the rear drive bridge.

[0012] Optionally, the battery circuit includes a battery water pump and a battery pack, wherein the battery water pump and the battery pack are connected in series; the battery water pump and the battery pack in the battery circuit can be short-circuited.

[0013] The battery circuit can be connected to the electric drive cooling circuit and the battery heat exchanger to cool the battery pack, or the battery circuit can be connected to the water heating circuit to heat the battery pack; when the battery water pump and the battery pack are short-circuited, the fluid medium in the battery circuit does not flow through the battery water pump and the battery pack.

[0014] In some scenarios and ambient temperatures, there is no need to cool or heat the battery pack. In such cases, the battery water pump and battery pack in the battery circuit can be short-circuited, allowing the fluid medium flowing out of the nine-way valve to flow back to the nine-way valve. The nine-way valve can then be used to connect or disconnect other circuits such as the electric drive cooling circuit, battery heat exchanger, and water heating circuit.

[0015] Optionally, the water heating circuit includes a heater core, a water heating PTC, and an electric water pump connected in series; the nine-way valve thermal management system also includes an engine water pump and an engine, wherein the engine water pump and the engine are connected in series and then connected in parallel to the water heating circuit.

[0016] The water heating circuit itself can heat the passenger compartment. If the water heating circuit is connected to the battery circuit, it can simultaneously heat the battery pack in the battery circuit. The engine water pump and the engine are connected in series and then in parallel to the water heating circuit. The waste heat from the engine operation can be collected in the water heating circuit and used together with the water heating circuit to heat the passenger compartment and the battery pack.

[0017] Optionally, in the first connection mode of the nine-way valve, the battery circuit is connected to the water heating circuit, the electric drive cooling circuit is connected to the battery heat exchanger, and the fluid medium in the electric drive cooling circuit flows through the low-temperature radiator.

[0018] In the first connection mode of the nine-way valve, passive cooling of the electric drive system can be achieved.

[0019] Optionally, in the second connection mode of the nine-way valve, the water heating circuit is connected through the nine-way valve, the electric drive cooling circuit is connected to the battery circuit and the battery heat exchanger, and the fluid medium in the electric drive cooling circuit does not flow through the low-temperature radiator.

[0020] In the second connection mode of the nine-way valve, active cooling of the electric drive system can be achieved.

[0021] Optionally, in the third connection mode of the nine-way valve, the water heating circuit is connected through the nine-way valve, the battery circuit is connected to the battery heat exchanger, the electric drive cooling circuit is connected through the nine-way valve, and the fluid medium in the electric drive cooling circuit flows through the low-temperature radiator.

[0022] In the third connection mode of the nine-way valve, active cooling of the battery pack can be achieved.

[0023] Optionally, in the fourth connection mode of the nine-way valve, the water heating circuit is connected through the nine-way valve, the electric drive cooling circuit is connected to the battery circuit and the battery heat exchanger, and the fluid medium in the electric drive cooling circuit flows through the low-temperature radiator.

[0024] In the fourth connection mode of the nine-way valve, passive cooling of the battery pack can be achieved.

[0025] This application also provides a hybrid vehicle, including the nine-way valve thermal management system, which improves the vehicle's thermal management efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the architecture of the nine-way valve thermal management system of this application.

[0028] Figure 2 This is a schematic diagram of the electric drive passive cooling mode (engine OFF).

[0029] Figure 3 This is a schematic diagram of the electric drive passive cooling mode (engine ON).

[0030] Figure 4 This is a schematic diagram of the electric drive active cooling mode (engine OFF).

[0031] Figure 5 This is a schematic diagram of the electric drive active cooling mode (engine ON).

[0032] Figure 6 This is a schematic diagram of the active battery cooling mode (engine OFF).

[0033] Figure 7 This is a schematic diagram of the battery active cooling mode (engine ON).

[0034] Figure 8 This is a schematic diagram of the battery passive cooling mode (engine OFF).

[0035] Figure 9 This is a schematic diagram of the battery passive cooling mode (engine ON).

[0036] exist Figures 1-9 middle: 1. Low-temperature radiator; 5. Electric water pump; 6. Three-way valve; 8. Front drive electric bridge; 9. Rear drive electric bridge; 10. Intercooler condenser; 11. Chiller; 12. Nine-way valve; 13. Three-way valve; 14. Battery water pump; 15. Battery pack; 16. Heater core; 17. PTC water heater; 18. Heater water pump; 19. Three-way valve; 22. Engine water pump; 23. Engine. Detailed Implementation

[0037] This application provides a nine-way valve thermal management system and a hybrid vehicle. By optimizing the architecture and adding a nine-way valve as a means of switching the main mode, it introduces an active cooling mode for electric drive and a passive cooling mode for the battery. This solves the problems of motor over-temperature torque limitation and lack of active cooling function for low-temperature battery, effectively reduces the selection specifications of low-temperature radiators and fan power requirements, and ensures the normal operation of the vehicle cooling system.

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] like Figure 1 As shown, the nine-way valve thermal management system provided in this application is applied to a hybrid vehicle. The hybrid vehicle includes an electric drive system, a battery pack 15, and a passenger compartment. The electric drive system includes a front drive electric axle 8 and a rear drive electric axle 9. The nine-way valve thermal management system includes: The electric drive cooling circuit is used to actively or passively cool the front drive bridge 8 and the rear drive bridge 9 of the electric drive system. The battery circuit is used to cool or heat the battery pack 15. The water heating circuit is used to heat the crew compartment; The battery heat exchanger, preferably Chiller11, achieves heat transfer from the low temperature region to the high temperature region through the phase change cycle of the refrigerant, and is used for active cooling of the electric drive system and the battery pack 15. Nine-way valve 12 is used to control the connection / disconnection of the electric drive cooling circuit, battery circuit, water heating circuit and Chiller 11 to form different circuits, so as to at least realize the mode of active cooling of the electric drive system under the condition of motor over-temperature and torque limitation, and the mode of active cooling of battery pack 15 under low temperature environment.

[0040] The nine-way valve thermal management system provided in this application optimizes the architecture by adding a nine-way valve 12 as a means of switching between various cooling modes: the electric drive cooling circuit can be connected to the Chiller 11 through the nine-way valve 12 to realize the electric drive active cooling mode; while the battery passive cooling mode can be realized by connecting the electric drive cooling circuit to the battery circuit through the nine-way valve 12. This solves the problems of motor over-temperature torque limitation and lack of active cooling function for low-temperature batteries, effectively reduces the selection specifications of low-temperature radiators and fan power requirements, and ensures the normal operation of the vehicle cooling system.

[0041] In a preferred embodiment, such as Figure 1 As shown, two of the nine ports of the nine-way valve 12 are connected to the battery circuit, that is, the two ports of the nine-way valve 12 are connected to the outlet and inlet of the battery circuit, respectively; the other two ports of the nine-way valve 12 are connected to the water heating circuit, that is, the other two ports of the nine-way valve 12 are connected to the outlet and inlet of the water heating circuit, respectively; the next two ports of the nine-way valve 12 are connected to the Chiller 11, that is, the next two ports of the nine-way valve 12 are connected to the inlet and outlet of the Chiller 11, respectively; the remaining three ports of the nine-way valve 12 are all connected to the electric drive cooling circuit. Specifically, the remaining three ports of the nine-way valve 12 are connected to the two inlets (the seventh and ninth ports of the nine-way valve 12) and one outlet (the first port of the nine-way valve 12) of the electric drive cooling circuit, respectively.

[0042] In this way, by switching the connection mode between the ports inside the nine-way valve, the connection / disconnection between the electric drive cooling circuit, the battery circuit, the water heating circuit and the Chiller11 can be switched to achieve the switching of different cooling and heating modes.

[0043] In a preferred embodiment, such as Figure 1 As shown, the electric drive cooling circuit includes: a low-temperature radiator 1, an electric drive water pump 5, a three-way valve 6, a front drive electric bridge 8, and a rear drive electric bridge 9, wherein the front drive electric bridge 8 and the rear drive electric bridge 9 are connected in parallel and then connected in series with the electric drive water pump 5. Specifically, the outlet of the low-temperature radiator 1 is connected to the inlet of the electric water pump 5. The outlet of the electric water pump 5 is connected to the inlets of the front drive bridge 8 and the rear drive bridge 9 via a three-way valve 6. The outlets of the front drive bridge 8 and the rear drive bridge 9 are both connected to the first port of the nine-way valve 12. The inlet of the low-temperature radiator 1 is connected to the seventh port of the nine-way valve 12. The inlet of the electric water pump 5 is also connected to the ninth port of the nine-way valve 12.

[0044] The front drive bridge 8 and rear drive bridge 9 in the electric drive cooling circuit can be passively cooled by the operation of the low-temperature radiator 1, or they can be actively cooled by the radiator 11 after the electric drive cooling circuit is connected to the radiator 11. The flow of fluid medium through the low-temperature radiator 1 is determined by switching the two inlets of the electric drive cooling circuit, thereby determining whether the low-temperature radiator 1 participates in the cooling of the electric drive cooling circuit.

[0045] In a preferred embodiment, such as Figure 1 As shown, an intercooler condenser 10 is also provided on the electric drive cooling circuit, and the intercooler condenser 10 is connected in parallel with the front drive bridge 8 and the rear drive bridge 9. Specifically, the outlet of the electric water pump 5 is connected to the inlet of the intercooler condenser 10 via a three-way valve 6, and the outlet of the intercooler condenser 10 is connected to the first port of the nine-way valve 12 via another three-way valve.

[0046] The intercooler condenser 10 is connected in parallel with the front drive bridge 8 and the rear drive bridge 9. A three-way valve 6 is provided at the inlet of the intercooler condenser 10 and a three-way connector is connected at the outlet. By opening and closing the inlet of the intercooler condenser 10 through the three-way valve 6, the fluid medium can be allowed to pass through or not pass through the intercooler condenser 10. In this way, the intercooler condenser 10 can be selectively cooled while the front drive bridge 8 and the rear drive bridge 9 are cooled.

[0047] In a preferred embodiment, such as Figure 1 As shown, the battery circuit includes a battery water pump 14 and a battery pack 15, wherein the battery water pump 14 and the battery pack 15 are connected in series. Specifically, the second port of the nine-way valve 12 is connected to the inlet of the battery water pump 14, the outlet of the battery water pump 14 is connected to the inlet of the battery pack 15, and the outlet of the battery pack 15 is connected to the eighth port of the nine-way valve 12.

[0048] The battery circuit can be connected to the electric drive cooling circuit and Chiller 11 to cool the battery pack 15, or the battery circuit can be connected to the water heating circuit to heat the battery pack 15.

[0049] In a preferred embodiment, such as Figure 1 As shown, the battery water pump 14 and battery pack 15 in the battery circuit can be short-circuited. When short-circuited, the fluid medium in the battery circuit does not flow through the battery water pump 14 and battery pack 15. Specifically, the second port of the nine-way valve 12 is connected to the inlet of the three-way valve 13, one outlet of the three-way valve 13 is connected to the inlet of the battery water pump 14, the outlet of the battery pack 15 is connected to the eighth port of the nine-way valve 12 through a three-way connector, and the other outlet of the three-way valve 13 is connected to the aforementioned three-way connector.

[0050] In some scenarios and ambient temperatures, there is no need to cool or heat the battery pack 15. In such cases, the battery water pump 14 and the battery pack 15 in the battery circuit can be short-circuited through the three-way valve 13 and another three-way valve, so that the fluid medium flowing out of the nine-way valve 12 flows back to the nine-way valve 12. The connection / disconnection of other circuits such as the electric drive cooling circuit, the Chiller 11 and the water heating circuit can be achieved through the nine-way valve 12.

[0051] In a preferred embodiment, such as Figure 1 As shown, the water heating circuit includes a heater core 16, a water heating PTC 17, and a heater pump 18 connected in series. The water heating PTC is a heating technology based on positive temperature coefficient (PTC) ceramic materials, which is mainly used to transfer heat through liquid media (such as water or antifreeze) to achieve efficient and safe heating. Specifically, the third port of the nine-way valve 12 is connected to the inlet of the warm air pump 18, the outlet of the warm air pump 18 is connected to the inlet of the water heating PTC 17, the outlet of the water heating PTC 17 is connected to the inlet of the warm air core 16, and the outlet of the warm air core 16 is connected to the fifth port of the nine-way valve 12.

[0052] The water heating circuit itself can heat the passenger compartment. If the water heating circuit is connected to the battery circuit through the nine-way valve 12, the battery pack 15 in the battery circuit can be heated at the same time as the passenger compartment.

[0053] In a preferred embodiment, such as Figure 1 As shown, the nine-way valve thermal management system also includes an engine water pump 22 and an engine 23, which are connected in series and then in parallel to the water heating circuit. Specifically, the third port of the nine-way valve 12 is connected to the inlet of the heater water pump 18 in sequence through a three-way connector and a three-way valve 19. This three-way connector is also connected to the engine water pump 22, the engine 23 and then to the three-way valve 19 in sequence.

[0054] The engine water pump 22 and the engine 23 are connected in series and then connected in parallel to the water heating circuit. When the engine 23 is not working, the water heating circuit heats the passenger compartment and the battery pack 15 separately. When the engine 23 is working, the waste heat of the engine 23 can be collected into the water heating circuit and used together with the water heating circuit to heat the passenger compartment and the battery pack 15.

[0055] In a preferred embodiment, in the first connection mode of the nine-way valve 12, the battery circuit is connected to the water heating circuit, the electric drive cooling circuit is connected to the Chiller 11, and the fluid medium in the electric drive cooling circuit flows through the low-temperature radiator 1.

[0056] In the first connection mode of the nine-way valve 12, passive cooling of the electric drive system can be achieved, and the operating energy consumption of the Chiller 11 can be reduced in low-temperature environments through the low-temperature radiator 1.

[0057] In a preferred embodiment, in the second connection mode of the nine-way valve 12, the water heating circuit is connected through the nine-way valve 12, the electric drive cooling circuit is connected to the battery circuit and the Chiller 11, and the fluid medium in the electric drive cooling circuit does not flow through the low-temperature radiator 1.

[0058] In the second connection mode of the nine-way valve 12, active cooling of the electric drive system can be achieved, which can solve the problem of motor over-temperature and torque limitation in heavy off-road scenarios.

[0059] In a preferred embodiment, in the third connection mode of the nine-way valve 12, the water heating circuit is connected through the nine-way valve 12, the battery circuit is connected to the Chiller 11, the electric drive cooling circuit is connected through the nine-way valve 12, and the fluid medium in the electric drive cooling circuit flows through the low-temperature radiator 1.

[0060] In the third connection mode of the nine-way valve 12, active cooling of the battery pack 15 can be achieved, which is suitable for scenarios where the temperature is not too low and there is no difficulty in oil return from the compressor at low temperature.

[0061] In a preferred embodiment, in the fourth connection mode of the nine-way valve 12, the water heating circuit is connected through the nine-way valve 12, the electric drive cooling circuit is connected to the battery circuit and the Chiller 11, and the fluid medium in the electric drive cooling circuit flows through the low-temperature radiator 1.

[0062] In the fourth connection mode of the nine-way valve 12, passive cooling of the battery pack 15 can be achieved, which can solve the problem of pressure differential that cannot be established due to the difficulty of oil return from the compressor at low temperature in low-temperature environments.

[0063] The following are the specific heating / cooling modes of the nine-way valve 12 under different connection modes and engine ON / OFF states: like Figure 2 As shown, in the first connection mode of the nine-way valve 12 and with the engine off, i.e., in the electric drive passive cooling mode (engine OFF), the circulation path of the fluid medium is as follows: Electric drive system cooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Low-temperature radiator 1; Battery pack heating: PTC17 water heating → Heater core 16 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Three-way valve 19 → Heater water pump 18 → PTC17 water heating; The crew cabin is heated by a PTC water heater. PTC17 water heating → Heater core 16 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Three-way valve 19 → Heater water pump 18 → PTC17 water heating.

[0064] like Figure 3 As shown, the circulation path of the fluid medium is as follows when the nine-way valve 12 is in the first connected mode and the engine is on, that is, in the electric drive passive cooling mode (engine ON): The electric drive system is cooled, and the intercooler can be used for selective cooling. Electric drive cooling: Low temperature radiator 1 → Electric drive water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Low temperature radiator 1; Intercooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Low-temperature radiator 1; The battery pack is heated by a combination of water-cooled PTC and waste heat from the engine. PTC17 water heating → Heater core 16 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Three-way valve 19 → Heater water pump 18 → PTC17 water heating; Engine 23 → Three-way valve 19 → Heater water pump 18 → PTC water heater 17 → Heater core 16 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Engine water pump 22 → Engine 23. The crew compartment is heated by a combination of water-based PTC heating and waste heat from the engine. PTC17 water heating → Heater core 16 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Three-way valve 19 → Heater pump 18 → PTC17 water heating; Engine 23 → Three-way valve 19 → Heater water pump 18 → PTC water heater 17 → Heater core 16 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Engine water pump 22 → Engine 23.

[0065] like Figure 4 As shown, the circulation path of the fluid medium when the nine-way valve 12 is in the second connection mode and the engine is off, that is, in the electric drive active cooling mode (engine OFF): Only the electric drive system is cooled; the intercooler can be used for selective cooling. Electric drive cooling: Chiller11 → 9-way valve 12 → 3-way valve 13 → 9-way valve 12 → electric drive water pump 5 → 3-way valve 6 → front drive electric bridge 8 / rear drive electric bridge 9 → 9-way valve 12 → Chiller11; Intercooling: Chiller11 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Chiller11; Battery pack and electric drive system are dual active cooling systems, with selective intercooling available. Chiller11→Nine-way valve 12→Three-way valve 13→Battery water pump 14→Battery pack 15→Nine-way valve 12→Electric water pump 5→Three-way valve 6→Front drive electric bridge 8 / Rear drive electric bridge 9→Nine-way valve 12→Chiller11. Chiller11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Electric water pump 5 → Three-way valve 6 → Intercooler condenser 10 → Nine-way valve 12 → Chiller11. The crew cabin is heated by a PTC water heater; Heating core 16 → Nine-way valve 12 → Three-way valve 19 → Heating water pump 18 → PTC water heating system 17 → Heating core 16.

[0066] like Figure 5 As shown, the circulation path of the fluid medium when the nine-way valve 12 is in the second connection mode and the engine is on, that is, in the electric drive active cooling mode (engine ON): Only the electric drive system is cooled; the intercooler can be used for selective cooling. Electric drive system cooling: Chiller11 → 9-way valve 12 → 3-way valve 13 → 9-way valve 12 → electric drive water pump 5 → 3-way valve 6 → front drive electric bridge 8 / rear drive electric bridge 9 → 9-way valve 12 → Chiller11; Intercooling: Chiller11 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Chiller11; Battery pack and electric drive system are dual active cooling systems, with selective intercooling available. Chiller11→Nine-way valve 12→Three-way valve 13→Battery water pump 14→Battery pack 15→Nine-way valve 12→Electric water pump 5→Three-way valve 6→Front drive electric bridge 8 / Rear drive electric bridge 9→Nine-way valve 12→Chiller11. Chiller11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Electric water pump 5 → Three-way valve 6 → Intercooler condenser 10 → Nine-way valve 12 → Chiller11. The crew compartment is heated by a combination of water-cooled PTC heating and waste heat from the engine. Heater core 16 → Nine-way valve 12 → Three-way valve 19 → Heater water pump 18 → PTC water heater 17 → Heater core 16; Heater core 16 → Nine-way valve 12 → Engine water pump 22 → Engine 23 → Three-way valve 19 → Heater water pump 18 → PTC water heater 17 → Heater core 16.

[0067] like Figure 6 As shown, the circulation path of the fluid medium when the nine-way valve 12 is in the third connection mode and the engine is off, that is, in the battery active cooling mode (engine OFF) state: The electric drive system is passively cooled, while the intercooler provides selective cooling. Electric drive passive cooling: Low temperature radiator 1 → Electric drive water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Low temperature radiator 1; Intercooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Low-temperature radiator 1; Active cooling of the battery pack: Chiller11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Chiller11; The crew cabin is heated by a PTC water heater; Heating core 16 → Nine-way valve 12 → Three-way valve 19 → Heating water pump 18 → PTC water heating system 17 → Heating core 16.

[0068] like Figure 7 As shown, the circulation path of the fluid medium when the nine-way valve 12 is in the third connection mode and the engine is on, that is, in the battery active cooling mode (engine ON) state: The electric drive system is passively cooled, while the intercooler provides selective cooling. Electric drive passive cooling: Low temperature radiator 1 → Electric drive water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Low temperature radiator 1; Intercooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Low-temperature radiator 1; Active cooling of the battery pack: Chiller11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Chiller11; The crew compartment is heated by a combination of water-cooled PTC heating and waste heat from the engine. Heating core 16 → Nine-way valve 12 → Three-way valve 19 → Heating water pump 18 → PTC water heating 17 → Heating core 16; Heater core 16 → Nine-way valve 12 → Engine water pump 22 → Engine 23 → Three-way valve 19 → Heater water pump 18 → PTC water heater 17 → Heater core 16.

[0069] like Figure 8As shown, the circulation path of the fluid medium when the nine-way valve 12 is in the fourth connection mode and the engine is off, that is, in the battery passive cooling mode (engine OFF) state: The electric drive system is passively cooled, while the intercooler provides selective cooling. Electric drive passive cooling: Low temperature radiator 1 → Electric drive water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Low temperature radiator 1. Intercooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Low-temperature radiator 1; The battery pack is passively cooled, while the intercooler provides selective cooling. Passive cooling for electric drive: Low temperature radiator 1 → Electric drive water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Low temperature radiator 1. Intercooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Low-temperature radiator 1. The crew cabin is heated by a PTC water heater. Heating core 16 → Nine-way valve 12 → Three-way valve 19 → Heating water pump 18 → PTC water heating system 17 → Heating core 16.

[0070] like Figure 9 As shown, the circulation path of the fluid medium when the nine-way valve 12 is in the fourth connection mode and the engine is on, that is, in the battery passive cooling mode (engine ON) state: The electric drive system is passively cooled, while the intercooler provides selective cooling. Electric drive passive cooling: Low temperature radiator 1 → Electric drive water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Low temperature radiator 1. Intercooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Nine-way valve 12 → Low-temperature radiator 1; The battery pack is passively cooled, while the intercooler provides selective cooling. Passive cooling for electric drive: Low-temperature radiator 1 → Electric drive water pump 5 → Three-way valve 6 → Front drive electric bridge 8 / Rear drive electric bridge 9 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Low-temperature radiator 1. Intercooling: Low-temperature radiator 1 → Electric water pump 5 → Three-way valve 6 → Intercooling condenser 10 → Nine-way valve 12 → Chiller 11 → Nine-way valve 12 → Three-way valve 13 → Battery water pump 14 → Battery pack 15 → Nine-way valve 12 → Low-temperature radiator 1. The crew compartment is heated by a combination of water-based PTC heating and waste heat from the engine. Heating core 16 → Nine-way valve 12 → Three-way valve 19 → Heating water pump 18 → PTC water heating system 17 → Heating core 16; Heater core 16 → Nine-way valve 12 → Engine water pump 22 → Engine 23 → Three-way valve 19 → Heater water pump 18 → PTC water heater 17 → Heater core 16.

[0071] This application also provides a hybrid vehicle including the aforementioned nine-way valve thermal management system, which improves the thermal management efficiency of the hybrid vehicle.

[0072] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0073] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the word “or” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0074] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled or recombined. These disassemblies or recombinations should be considered as equivalent solutions of this application.

[0075] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0076] It should be understood that the qualifying terms “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0077] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A nine-way valve thermal management system, applied to a hybrid vehicle, the hybrid vehicle including an electric drive system, a battery pack (15), and a passenger compartment, characterized in that, The nine-way valve thermal management system includes: An electric drive cooling circuit is used to actively or passively cool the electric drive system. A battery circuit is used to cool or heat the battery pack (15); A water-heating circuit is used to heat the passenger compartment; A battery heat exchanger (11) is used to actively cool the electric drive system and the battery pack (15). Nine-way valve (12) is used to control the connection / disconnection of the electric drive cooling circuit, the battery circuit, the water heating circuit and the battery heat exchanger (11) to form different circuits, so as to at least realize the mode of active cooling of the electric drive system under the condition of motor over-temperature and torque limit, and the mode of passive cooling of the battery pack (15) under low temperature environment.

2. The nine-way valve thermal management system according to claim 1, characterized in that, Two of the nine ports of the nine-way valve (12) are connected to the battery circuit; the other two ports of the nine-way valve (12) are connected to the water heating circuit; the remaining two ports of the nine-way valve (12) are connected to the battery heat exchanger (11); and the other three ports of the nine-way valve (12) are connected to the electric drive cooling circuit.

3. The nine-way valve thermal management system according to claim 1, characterized in that, The electric drive cooling circuit includes: a low-temperature radiator (1), an electric drive water pump (5), a three-way valve (6), a front drive bridge (8) and a rear drive bridge (9), wherein the front drive bridge (8) and the rear drive bridge (9) are connected in parallel and then connected in series with the electric drive water pump (5).

4. The nine-way valve thermal management system according to claim 3, characterized in that, The electric drive cooling circuit is also equipped with an intercooler condenser (10), which is connected in parallel with the front drive bridge (8) and the rear drive bridge (9).

5. The nine-way valve thermal management system according to claim 1, characterized in that, The battery circuit includes a battery water pump (14) and a battery pack (15), wherein the battery water pump (14) and the battery pack (15) are connected in series; The battery water pump (14) and the battery pack (15) on the battery circuit can be short-circuited. When short-circuited, the fluid medium in the battery circuit does not flow through the battery water pump (14) and the battery pack (15).

6. The nine-way valve thermal management system according to claim 1, characterized in that, The water heating circuit includes a heating core (16), a water heating PTC (17), and a heating water pump (18) connected in series. The nine-way valve thermal management system also includes an engine water pump (22) and an engine (23), which are connected in series and then in parallel to the water heating circuit.

7. The nine-way valve thermal management system according to claim 3, characterized in that, In the first connection mode of the nine-way valve (12), the battery circuit is connected to the water heating circuit, the electric drive cooling circuit is connected to the battery heat exchanger (11), and the fluid medium in the electric drive cooling circuit flows through the low-temperature radiator (1).

8. The nine-way valve thermal management system according to claim 3, characterized in that, In the second connection mode of the nine-way valve (12), the water heating circuit is connected through the nine-way valve (12), the electric drive cooling circuit is connected to the battery circuit and the battery heat exchanger (11), and the fluid medium in the electric drive cooling circuit does not flow through the low temperature radiator (1).

9. The nine-way valve thermal management system according to claim 3, characterized in that, In the third connection mode of the nine-way valve (12), the water heating circuit is connected through the nine-way valve (12), the battery circuit is connected to the battery heat exchanger (11), the electric drive cooling circuit is connected through the nine-way valve (12), and the fluid medium in the electric drive cooling circuit flows through the low temperature radiator (1).

10. The nine-way valve thermal management system according to claim 3, characterized in that, In the fourth connection mode of the nine-way valve (12), the water heating circuit is connected through the nine-way valve (12), the electric drive cooling circuit is connected to the battery circuit and the battery heat exchanger (11), and the fluid medium in the electric drive cooling circuit flows through the low temperature radiator (1).

11. A hybrid vehicle, characterized in that, Includes the nine-way valve thermal management system as described in any one of claims 1-10.

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