Extended-range automobile thermal management system, control method, valve body assembly and automobile

Abstract

The invention belongs to the technical field of automobile thermal management, and particularly relates to a range-extended automobile thermal management system, a control method, a valve body assembly and an automobile, and the range-extended automobile thermal management system comprises a front end loop at least comprising a first low-temperature radiator; the motor loop at least comprises a rear motor; and when the water temperature of the outlet of the first low-temperature radiator is lower than a first preset temperature, the cooling liquid flowing out of the rear motor flows through the first low-temperature radiator for heat exchange and then flows into the rear motor again. The problems that an automobile is low in heat exchange efficiency and high in energy consumption in different automobile modes are solved.

Description

Technical Field

[0001] This invention belongs to the field of automotive thermal management technology, specifically relating to a range-extended vehicle thermal management system, control method, valve body assembly, and vehicle. Background Technology

[0002] Range-extended vehicles not only have engine components, but also electric vehicle components such as batteries and electric drives.

[0003] Turbocharged engines generally require a turbocharger cooling system, which can be an air-cooled intercooler system or a water-cooled intercooler system. For turbocharged engines with water-cooled intercoolers, especially in range-extended vehicles, there are usually two independent low-temperature cooling circuits: one for cooling the electric drive and vehicle controllers, and the other for cooling the engine's water-cooled intercooler.

[0004] However, due to limitations in vehicle layout and front bumper design, it is difficult to simultaneously ensure efficient heat exchange in both circuits. Furthermore, for range-extended vehicles, users primarily use pure electric mode, while hybrid mode is generally used by long-distance users when charging is inconvenient. In the above-mentioned independent circuit system, only the electric drive cooling circuit is working in pure electric mode, while the radiator of the other circuit does not work, resulting in inefficient utilization.

[0005] In hybrid mode, users expect the engine to operate efficiently, thereby reducing fuel consumption.

[0006] The radiators used in the water-cooled intercoolers of the above independent circuits are arranged after the air conditioner condenser and electric drive radiator, resulting in low heat exchange efficiency. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a range-extended vehicle thermal management system, control method, valve body assembly, and vehicle, which solves the problems of low heat exchange efficiency and high energy consumption in different vehicle modes.

[0008] To achieve the above objectives, the present invention adopts the following technical solution.

[0009] The first aspect of this invention provides a thermal management system for range-extended electric vehicles, comprising: The front-end circuit includes at least a first low-temperature heat sink; The motor circuit includes at least the rear motor; When the outlet water temperature of the first low-temperature radiator is lower than the first preset temperature, the coolant flowing out of the rear motor flows through the first low-temperature radiator for heat exchange and then flows back into the rear motor.

[0010] As an optional implementation, the front-end circuit further includes a second low-temperature heat sink; When the outlet water temperature of the first low-temperature radiator is greater than or equal to the first preset temperature: the coolant flowing out of the rear motor exchanges heat through the first low-temperature radiator and the second low-temperature heat exchanger, and the two flow back into the rear motor for cooling.

[0011] As an optional implementation, the range-extended vehicle thermal management system further includes a second low-temperature radiator, a water-cooled intercooler, and a generator; The water-cooled intercooler is connected to the second low-temperature radiator, and the coolant flowing out of the water-cooled intercooler can exchange heat with the first low-temperature radiator through the second low-temperature radiator. When the outlet water temperature of the first low-temperature radiator is lower than the second preset temperature: the coolant flowing out of the rear motor and the generator exchanges heat with the first low-temperature radiator, one path flows into the rear motor and the generator for cooling; the other path mixes with the coolant flowing out of the second low-temperature radiator to cool the high-temperature gas, and the cooled gas enters the engine.

[0012] As an optional implementation, the range-extended vehicle thermal management system further includes a generator; When the outlet water temperature of the first low-temperature radiator is greater than or equal to the third preset temperature, there are two independently operating loops: In circuit one, the coolant flowing out of the rear motor and the generator exchanges heat with the first low-temperature radiator before flowing back into the rear motor and the generator for cooling. In circuit two, the water-cooled intercooler is connected to the second low-temperature radiator. The coolant flowing out of the water-cooled intercooler can exchange heat with the first low-temperature radiator through the second low-temperature radiator. The coolant flowing out of the second low-temperature radiator mixes to cool the high-temperature gas, and the cooled gas enters the engine.

[0013] As an optional implementation, when the outlet water temperature of the first low-temperature radiator is greater than or equal to the second preset temperature and the outlet temperature of the first low-temperature radiator is less than the third preset temperature, the current system operation mode is maintained by default.

[0014] As an optional implementation, the range-extended vehicle thermal management system further includes a first electronic water pump and a second electronic water pump; one end of the first electronic water pump is connected to a water-cooled intercooler, and the other end of the first electronic water pump is connected to a second low-temperature radiator; one end of the second electronic water pump is connected to the rear motor, and the other end of the second electronic water pump is connected to the first low-temperature radiator.

[0015] A second aspect of the present invention provides a valve body assembly, comprising: Interface a and interface b, wherein interface a is connected to a first low-temperature heat sink; Interface b is connected to the rear motor; The valve body assembly is used in the range-extended vehicle thermal management system as described in the first aspect of the present invention. When the outlet water temperature of the first low-temperature radiator is lower than the first preset temperature, the coolant flowing out of the rear motor flows through the first low-temperature radiator for heat exchange, and then flows back into the rear motor through interface a and interface b of the valve body assembly.

[0016] As an optional implementation, the valve body assembly further includes: Interfaces c, d, and e are provided, wherein interface c is connected to the water-cooled intercooler, interface d is connected to the water-cooled intercooler, and interface e is connected to the second low-temperature radiator. The range-extended vehicle thermal management system also includes a second low-temperature radiator, a water-cooled intercooler, and a generator; The water-cooled intercooler is connected to the second low-temperature radiator, and the coolant flowing out of the water-cooled intercooler can exchange heat with the first low-temperature radiator through the second low-temperature radiator. When the outlet water temperature of the first low-temperature radiator is less than the second preset temperature: the coolant flowing out of the rear motor and the generator exchanges heat with the first low-temperature radiator, and then splits into two paths through the interface a of the valve body assembly, flowing out through the interface b and interface c of the valve body assembly respectively. After flowing out from interface b, the coolant enters the rear motor and generator for cooling. The heated coolant flowing out of the water-cooled intercooler enters the second low-temperature radiator and the air discharged from the first low-temperature radiator for heat exchange, and then flows out through interfaces e and d of the valve body assembly. After flowing out, it mixes with the coolant flowing out from interface c and then enters the water-cooled intercooler to cool the high-temperature gas. The cooled gas enters the engine through the interface.

[0017] As an optional implementation, it also includes: When the outlet water temperature of the first low-temperature radiator is greater than or equal to the first preset temperature: the coolant flowing out of the rear motor passes through the first low-temperature radiator for heat exchange and flows out through interface a and interface b of the valve body assembly, and passes through the second low-temperature heat exchanger for heat exchange and flows out through interface e and interface b of the valve body assembly. The two flow back into the rear motor for cooling after merging.

[0018] A third aspect of the present invention provides an automotive thermal management control method, applied to a thermal management system as described in the first aspect of the present invention or a valve body assembly as described in the second aspect of the present invention.

[0019] A fourth aspect of the present invention provides an automobile including an automobile thermal management system as provided in the first aspect of the present invention or a valve body assembly as described in the second aspect of the present invention.

[0020] The extended-range vehicle thermal management system and control method provided by this invention can improve the heat exchange efficiency of electric drive and engine in different vehicle modes, reduce energy consumption and fuel consumption. Moreover, when the outlet water temperature of the first low-temperature radiator is lower than the preset value, the invention can cause the coolant to flow back to the motor after heat exchange, accurately regulate the temperature of the motor, ensure its stable operation, improve thermal management efficiency, and optimize the adaptability of extended-range vehicles to operating conditions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a circuit diagram of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0023] Figure 2 This is an example diagram of a five-way valve mode 1 according to an embodiment of the present invention.

[0024] Figure 3 This is an example diagram of a two-way valve configuration according to an embodiment of the present invention.

[0025] Figure 4 This is an example diagram of mode three of the five-way valve according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram illustrating the operating principle of various energy modes of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of a range-extended vehicle thermal management system in system mode one according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of a range-extended vehicle thermal management system in system mode two according to an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of a range-extended vehicle thermal management system in system mode four according to an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of a range-extended vehicle thermal management system in system mode three according to an embodiment of the present invention.

[0031] Figure label: 1-Five-way water valve (five-way valve); 2-Air conditioner condenser; 3-First low-temperature radiator; 4-Second low-temperature radiator; 5-High-temperature radiator; 6-Cooling fan; 7-First electronic water pump; 8-Second electronic water pump; 9-Water-cooled intercooler; 10-First interface; 11-Second interface; 12-Other controllers; 13-Rear motor; 14-Water temperature sensor; 15-Generator. Detailed Implementation

[0032] 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. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application.

[0033] It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment in the following embodiments have their own emphasis; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0034] like Figure 1 As shown, the first aspect of the present invention provides a thermal management system for a range-extended vehicle, including a five-way water valve 1, an air conditioning condenser 2, a first low-temperature radiator 3, a second low-temperature radiator 4, a high-temperature radiator 5, a cooling fan 6, a first electronic water pump 7, a second electronic water pump 8, a water-cooled intercooler 9, other controllers 12, a rear motor 13, a water temperature sensor 14, and a generator 15.

[0035] Specifically, the front-end circuit consists of the air conditioner condenser 2, the first low-temperature radiator 3, the second low-temperature radiator 4, the high-temperature radiator 5, and the cooling fan 6.

[0036] Specifically, the other controllers 12, the rear motor 13, and the generator 15 form a motor circuit. The other controllers are a general term for controllers that require water cooling, such as intelligent driving controllers, central brain controllers, and high and low voltage integrated charging modules. They can also be referred to as a controller set. Those skilled in the art can summarize them according to the actual layout without affecting the content to be protected by this invention.

[0037] Specifically, the air conditioner condenser 2 is used for air conditioning refrigeration and battery cooling.

[0038] Specifically, the first low-temperature radiator 3 is used for cooling the other controllers 12 and the rear motor 13.

[0039] Specifically, the second low-temperature radiator 4 is used for cooling the water-cooled intercooler 9.

[0040] Specifically, the high-temperature radiator 5 is used for cooling the engine body and its accessories.

[0041] Specifically, arranging the first low-temperature radiator 3 and the air conditioner condenser 2 side by side can improve the cooling efficiency of the air conditioner and electric drive.

[0042] Specifically, one end of the first electronic water pump 7 is connected to the water-cooled intercooler 9, and the other end of the first electronic water pump 7 is connected to the second low-temperature radiator 4; one end of the second electronic water pump 8 is connected to the rear motor 13, and the other end of the second electronic water pump 8 is connected to the first low-temperature radiator 3.

[0043] Furthermore, when the Z-axis space of the front bumper is limited, the first low-temperature radiator 3 can be arranged in the first row, the air conditioning condenser 2 can be arranged in the second row, and the third and fourth rows can be the second low-temperature radiator 5 and the high-temperature radiator 6, respectively.

[0044] This front-end module arrangement can avoid the problem of limited Z-axis space in the front cover, and is also within the scope of protection of this invention.

[0045] Specifically, the generator and the rear motor are connected in parallel.

[0046] Specifically, the water-cooled intercooler 9 has one channel through which coolant flows and exchanges heat with the second low-temperature radiator 4, and another channel through which gas flows. It has an interface 10 and an interface 11. Interface 10 is connected to the engine intake, and interface 11 is connected to the water-cooled intercooler intake port.

[0047] Specifically, the water temperature sensor 14 is located at the outlet of the first low-temperature radiator 3 to monitor the outlet water temperature.

[0048] The contents related to the air conditioning system, battery cooling system, and engine high-temperature circuit cooling system are existing technologies and will not be elaborated upon in this patent.

[0049] Specifically, the five-way water valve 1 has five water ports: a, b, c, d, and e, which are also called interfaces. Among them, interface a is connected to the first low-temperature radiator 3; interface b is connected to the rear motor 13 via another controller 12; interface c is connected to the water-cooled intercooler; interface d is connected to the water-cooled intercooler; and interface e is connected to the second low-temperature radiator 4.

[0050] Specifically, such as Figures 2-5 As shown, the five-way valve in the range-extended vehicle thermal management system of the present invention has at least three valve modes, including five-way valve mode one, five-way valve mode two and five-way valve mode three.

[0051] Furthermore, the range-extended vehicle thermal management system described in this invention has at least system mode one, system mode two, system mode three, and system mode four, and their operation matching logic is shown in Table 1: Table 1:

[0052] In one embodiment of the present invention, in pure electric mode, the engine does not work. When the outlet water temperature of the first low-temperature radiator 3 is lower than the first preset temperature, the system is in system mode one, the five-way water valve is in five-way valve mode two, and the coolant flowing out of the rear motor flows through the first low-temperature radiator for heat exchange and then flows back into the rear motor.

[0053] Examples include Table 1 and Figure 6 As shown, when the outlet water temperature of the first low-temperature radiator 3 is less than the first preset temperature, the system is in system mode one, the five-way valve is in five-way valve mode two, the first electronic water pump 7 does not work, and the second electronic water pump 8 works.

[0054] The heated coolant flowing out from other controllers 12 and rear motor 13 enters the low-temperature radiator 3 and the ambient air entering the front gate through the second electronic water pump 8 for heat exchange and cooling. After cooling, it flows out and enters other controllers 12 and rear motor 13 through ports a and b of the five-way water valve 1 for cooling, completing one cycle.

[0055] In pure electric mode, generator 15 does not work and only serves as a power source.

[0056] In one embodiment of the present invention, when the outlet water temperature of the first low-temperature radiator is greater than or equal to the first preset temperature: the coolant flowing out of the rear motor 13 passes through the first low-temperature radiator 3 for heat exchange and through the second low-temperature heat exchanger 4 for heat exchange. After the two are combined, they flow back into the rear motor 13 for cooling.

[0057] Specifically, as shown in Table 1 and Figure 7 As shown, when the outlet water temperature of the first low-temperature radiator 3 is greater than or equal to the first preset temperature, the system is in system mode 2, the five-way valve is in five-way valve mode 1, the first electronic water pump 7 does not work, and the second electronic water pump 8 works.

[0058] The heated coolant flowing from other controllers 12 and rear motor 13 is divided into two paths after passing through the second electronic water pump 8. One path enters the low-temperature radiator 3 and exchanges heat with the ambient air entering the front gate before flowing out through ports a and b of the five-way valve 1. The other path enters the second low-temperature radiator 4 and exchanges heat with the air discharged from the air conditioner condenser 2 and first low-temperature radiator 3 before flowing out through ports e and b of the five-way water valve 1. The two paths merge and then enter other controllers 12 and rear motor 13 for cooling, completing one cycle.

[0059] In this mode, when the water temperature is high due to harsh driving conditions (continuous uphill climbing in hot weather, extremely high speed driving), both radiators can be used simultaneously to dissipate heat, improving cooling efficiency, lowering water temperature, and thus improving motor efficiency. In pure electric mode, generator 15 does not operate and only serves a circulation function.

[0060] In one embodiment of the present invention, the water-cooled intercooler 9 is connected to the second low-temperature radiator 4 via the first electronic water pump, and the coolant flowing out of the water-cooled intercooler 9 can exchange heat with the first low-temperature radiator 3 via the second low-temperature radiator 4. When the outlet water temperature of the first low-temperature radiator 3 is lower than the second preset temperature: the coolant flowing out of the rear motor 13 and the generator 15 exchanges heat with the first low-temperature radiator 3, one path flows into the rear motor 13 and the generator 15 for cooling; the other path mixes with the coolant flowing out of the second low-temperature radiator 4 to cool the high-temperature gas, and the cooled gas enters the engine.

[0061] Specifically, in hybrid mode, the engine operates.

[0062] When the vehicle starts, the five-way (water) valve 1 defaults to the five-way valve mode 2, the system defaults to the system mode 3, the first electronic water pump 7 works, the second electronic water pump 8 works, and the two circuits operate independently.

[0063] As shown in Table 1 and Figure 8 As shown, when the outlet water temperature of the first low-temperature radiator 3 is less than the second preset temperature, the system is in system mode four, the five-way (water) valve is in five-way valve mode three, the first electronic water pump 7 is working, and the second electronic water pump 8 is working.

[0064] The heated coolant flowing from other controllers 12, rear motor 13, and generator 15 enters the low-temperature radiator 3 via the second electronic water pump 8, where it exchanges heat with the ambient air entering the front bumper before flowing out. It then splits into two paths via port a of the five-way water valve 1, flowing out through ports b and c respectively. The coolant flowing from port b enters the other controllers 12, rear motor 13, and generator 15 for cooling. The heated coolant flowing from the water-cooled intercooler 9 enters the second low-temperature radiator 4 via the first electronic water pump 7, where it exchanges heat with the air discharged from the air conditioning condenser 2 and the first low-temperature radiator 3 before flowing out through ports e and d of the five-way water valve 1. After mixing with the coolant flowing from port c, it enters the water-cooled intercooler 9 to cool the high-temperature gas. The cooled gas then enters the engine via port 10.

[0065] In this mode, the motor cooling circuit has sufficient capacity, allowing a portion of the low-temperature coolant to enter the water-cooled intercooler circuit to lower the water-cooled intercooler coolant temperature, thereby reducing the engine intake air temperature and improving engine efficiency.

[0066] In one embodiment of the present invention, when the outlet water temperature of the first low-temperature radiator 3 is greater than or equal to a third preset temperature, there are two independently operating loops: In circuit one, the coolant flowing out of the rear motor 13 and the generator 15 exchanges heat with the first low-temperature radiator 3 and then flows into the rear motor 13 and the generator 15 for cooling. In circuit two, the water-cooled intercooler 9 is connected to the second low-temperature radiator 4. The coolant flowing out of the water-cooled intercooler 9 can exchange heat with the first low-temperature radiator 3 through the second low-temperature radiator 4. The coolant flowing out of the second low-temperature radiator 3 mixes to cool the high-temperature gas, and the cooled gas enters the engine.

[0067] Specifically, as shown in Table 1 and Figure 9 As shown, when the outlet water temperature of the first low-temperature radiator 3 is greater than or equal to the third preset temperature, the system is in system mode three, the five-way (water) valve is in five-way valve mode two, the first electronic water pump 7 is working, and the second electronic water pump 8 is working.

[0068] The heated coolant flowing from other controllers 12, rear motor 13, and generator 15 enters the low-temperature radiator 3 via the second electronic water pump 8, where it exchanges heat with the ambient air entering the front bumper before flowing out. It then flows out through ports a and b of the five-way water valve 1, entering the other controllers 12, rear motor 13, and generator 15 for further cooling. The heated coolant flowing from the water-cooled intercooler 9 enters the second low-temperature radiator 4 via the first electronic water pump 7, where it exchanges heat with the air discharged from the air conditioning condenser 2 and first low-temperature radiator 3 before flowing out through ports e and d of the five-way water valve 1. After flowing out, it enters the water-cooled intercooler 9 to cool the high-temperature gas, and the cooled gas enters the engine through port 10. This completes one cycle.

[0069] In this mode, the motor cooling circuit capacity is close to the limit, and the two circuits operate independently.

[0070] In one embodiment of the present invention, when the outlet water temperature of the first low-temperature radiator is greater than or equal to the second preset temperature and the outlet temperature of the first low-temperature radiator is less than the third preset temperature, the current system operation mode is maintained by default.

[0071] For example, when the second preset temperature is less than or equal to the outlet water temperature of the first low-temperature radiator 3 and less than the third preset temperature, the system is in the current mode. If the current mode is the default system mode three, then the system will continue to operate in the default system mode three. If the current mode is system mode four, then the system will continue to operate in the default system mode four.

[0072] It should be noted that the first preset temperature corresponds to the temperature threshold in the pure electric driving mode of the range-extended vehicle, while the second and third preset temperatures correspond to the temperature thresholds in the hybrid driving mode. In a single driving mode, the pure electric driving mode and the hybrid driving mode do not occur simultaneously; therefore, this invention does not consider the situation between the first and second preset temperatures. Those skilled in the art can obtain these thresholds based on the actual pure electric driving mode and the actual hybrid driving mode of the range-extended vehicle; therefore, this invention does not define specific preset temperature values.

[0073] The extended-range vehicle thermal management system provided by this invention can improve the heat exchange efficiency of the electric drive and engine, and reduce energy and fuel consumption in different vehicle modes. In pure electric mode, the electric drive radiator and the water-cooled intercooler radiator can be coupled to cool the electric drive, reduce water temperature, improve motor efficiency, and enhance driving performance. In hybrid mode, a portion of the water from the electric drive radiator outlet temperature can be selectively diverted to the water-cooled intercooler circuit. This ensures that the vehicle controller and electric drive operate within the required water temperature range, and also lowers the water temperature of the water-cooled intercooler by mixing water, thereby reducing the engine intake air temperature and improving engine efficiency. When the electric drive radiator outlet temperature is high, the two circuits operate independently.

[0074] A second aspect of the present invention provides a valve body assembly, comprising: The valve body assembly includes at least interface a and interface b, wherein interface a is connected to the first low-temperature radiator; Interface b is connected to the rear motor; The valve body assembly is used in the range-extended vehicle thermal management system as described in any of the above embodiments; When the outlet water temperature of the first low-temperature radiator is lower than the first preset temperature, the coolant flowing out of the rear motor flows through the first low-temperature radiator for heat exchange, and then flows back into the rear motor through interface a and interface b of the valve body assembly.

[0075] Specifically, the valve body assembly can be a five-way valve, or a five-way water valve.

[0076] In one embodiment of the present invention, the valve body assembly further includes interface c, interface d and interface e, wherein interface c is connected to the water-cooled intercooler 9, interface d is also connected to the water-cooled intercooler 9, and interface e is connected to the second low-temperature radiator 4. The coolant flowing out of the water-cooled intercooler 9 can exchange heat with the first low-temperature radiator 3 through the second low-temperature radiator 4; When the outlet water temperature of the first low-temperature radiator 3 is less than the second preset temperature: the coolant flowing out through the rear motor 13 and the generator 15 exchanges heat with the first low-temperature radiator 3, and then splits into two paths through the interface a of the valve body assembly, flowing out through the interface b and interface c of the valve body assembly respectively. After flowing out from interface b, the coolant enters the rear motor 13 and generator 15 for cooling. The heated coolant flowing out of the water-cooled intercooler 9 enters the second low-temperature radiator 4 and the air discharged from the first low-temperature radiator 3 for heat exchange, and then flows out through interfaces e and d of the valve body assembly. After flowing out, it mixes with the coolant flowing out from interface c and then enters the water-cooled intercooler 9 to cool the high-temperature gas. The cooled gas enters the engine 15 through the interface.

[0077] In one embodiment of the present invention, when the outlet water temperature of the first low-temperature radiator is greater than or equal to the first preset temperature: the coolant flowing out of the rear motor passes through the first low-temperature radiator 3 for heat exchange and flows out through the valve body assembly's interface a and interface b, and passes through the second low-temperature heat exchanger 4 for heat exchange and flows out through the valve body assembly's interface e and interface b. The two then merge and flow back into the rear motor 13 for cooling.

[0078] In one embodiment of the present invention, the heated coolant flowing from other controllers 12, rear motor 13, and generator 15 enters the low-temperature radiator 3 via the second electronic water pump 8, where it exchanges heat with the ambient air entering the front gate for cooling before flowing out. It then flows out through ports a and b of the five-way water valve 1, entering the other controllers 12, rear motor 13, and generator 15 for further cooling. The heated coolant flowing from the water-cooled intercooler 9 enters the second low-temperature radiator 4 via the first electronic water pump 7, where it exchanges heat with the air discharged from the air conditioning condenser 2 and first low-temperature radiator 3 before flowing out through ports e and d of the five-way water valve 1. After flowing out, it enters the water-cooled intercooler 9 to cool the high-temperature gas, and the cooled gas enters the engine through port 10. This completes one cycle. In this mode, the motor cooling circuit capacity is close to its limit, and the two circuits operate independently.

[0079] The valve body assembly provided by this invention can improve the heat exchange efficiency of the electric drive and engine, and reduce energy and fuel consumption in different vehicle modes. In pure electric mode, the electric drive radiator and the water-cooled intercooler radiator can be coupled to cool the electric drive, reduce water temperature, improve motor efficiency, and enhance driving performance. In mixed mode, a portion of the water from the electric drive radiator outlet temperature can be selectively diverted to the water-cooled intercooler circuit. This ensures that the vehicle controller and electric drive operate within the required water temperature range, and also lowers the water temperature of the water-cooled intercooler by mixing water, thereby reducing the engine intake air temperature and improving engine efficiency. When the electric drive radiator outlet temperature is high, the two circuits operate independently.

[0080] A third aspect of the present invention provides an automotive thermal management control method, applied to a thermal management system or valve assembly as described in any of the above embodiments.

[0081] A fourth aspect of the present invention provides an automobile including a thermal management system or valve body assembly as described in any of the above embodiments.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range extended vehicle thermal management system, characterized in that, The application relates to a heat management system for a range-extended vehicle. The front-end circuit comprises at least a first low-temperature radiator; The motor circuit comprises at least a rear motor; When the outlet water temperature of the first low-temperature radiator is lower than a first preset temperature, the cooling liquid flowing out of the rear motor flows through the first low-temperature radiator for heat exchange and then reflows into the rear motor.

2. The extended-range automotive thermal management system of claim 1, wherein The front-end circuit further comprises a second low-temperature radiator; When the outlet water temperature of the first low-temperature radiator is greater than or equal to the first preset temperature, the cooling liquid flowing out of the rear motor flows through the first low-temperature radiator for heat exchange and the second low-temperature radiator for heat exchange, and then reflows into the rear motor.

3. The extended-range automotive thermal management system of claim 1, wherein, The application further relates to a heat management system for a range-extended vehicle, which comprises a second low-temperature radiator, a water-cooled intercooler and a generator. The water-cooled intercooler is connected with the second low-temperature radiator, and the cooling liquid flowing out of the water-cooled intercooler can be exchanged with the first low-temperature radiator through the second low-temperature radiator. When the outlet water temperature of the first low-temperature radiator is lower than a second preset temperature, the cooling liquid flowing out of the rear motor and the generator flows through the first low-temperature radiator for heat exchange, and then flows into the rear motor and the generator for cooling.

4. The extended-range automotive thermal management system of claim 1, wherein, The application further relates to a heat management system for a range-extended vehicle, which comprises a generator. When the outlet water temperature of the first low-temperature radiator is greater than or equal to a third preset temperature, two independent circuits exist: In the first circuit, the cooling liquid flowing out of the rear motor and the generator flows through the first low-temperature radiator for heat exchange and then flows into the rear motor and the generator for cooling. In the second circuit, the water-cooled intercooler is connected with the second low-temperature radiator, and the cooling liquid flowing out of the water-cooled intercooler can be exchanged with the first low-temperature radiator through the second low-temperature radiator.

5. The extended-range automotive thermal management system of claim 1, wherein, When the outlet water temperature of the first low-temperature radiator is greater than or equal to the second preset temperature and the outlet water temperature of the first low-temperature radiator is lower than the third preset temperature, the current system operation mode is kept by default.

6. The extended-range automotive thermal management system of claim 1, wherein, The application further relates to a heat management system for a range-extended vehicle, which comprises a first electronic water pump and a second electronic water pump.

7. A valve body assembly characterized by, One end of the first electronic water pump is connected with the water-cooled intercooler, and the other end of the first electronic water pump is connected with the second low-temperature radiator. One end of the second electronic water pump is connected with the rear motor, and the other end of the second electronic water pump is connected with the first low-temperature radiator. The application relates to a heat management system for a range-extended vehicle. The interface a is connected with the first low-temperature radiator; The interface b is connected with the rear motor; 8. The valve body assembly of claim 7, wherein, The valve body assembly is applied to the heat management system for the range-extended vehicle. When the outlet water temperature of the first low-temperature radiator is lower than a first preset temperature, the cooling liquid flowing out of the rear motor flows through the first low-temperature radiator for heat exchange and then reflows into the rear motor through the interface a and the interface b of the valve body assembly. The application relates to a heat management system for a range-extended vehicle. The interface c is connected with the water-cooled intercooler; The heat management system for the range-extended vehicle further comprises a second low-temperature radiator, a water-cooled intercooler and a generator. A water-cooled intercooler is connected to the second low-temperature radiator, and the cooling liquid flowing out of the water-cooled intercooler can exchange heat with the first low-temperature radiator through the second low-temperature radiator; When the outlet water temperature of the first low-temperature radiator is less than the second preset temperature: the cooling liquid flowing out of the rear motor and the generator exchanges heat with the first low-temperature radiator, and then is divided into two paths through the interface a of the valve body assembly, and flows out through the interface b and the interface c of the valve body assembly, respectively; After flowing out of the interface b, the cooling liquid enters the rear motor and the generator for cooling, and the heated cooling liquid flowing out of the water-cooled intercooler exchanges heat with the air discharged from the first low-temperature radiator, and then flows out through the interface e and the interface d of the valve body assembly, and after mixing with the cooling liquid flowing out of the interface c, enters the water-cooled intercooler to cool the high-temperature gas, and the cooled gas enters the engine through the interface.

9. The valve body assembly of claim 7, wherein, Further comprising: When the outlet water temperature of the first low-temperature radiator is greater than or equal to the first preset temperature: the cooling liquid flowing out of the rear motor exchanges heat with the first low-temperature radiator in one path, and flows out through the interface a and the interface b of the valve body assembly, and exchanges heat with the second low-temperature radiator in the other path, and flows out through the interface e and the interface b of the valve body assembly, and after merging, reflows into the rear motor for cooling.

10. An automotive thermal management control method, characterized by, Applied to the thermal management system of any one of claims 1 to 6 or the valve body assembly of claim 7 or 9.

11. An automobile characterized by comprising: Including the automotive thermal management system of claims 1-6 or the valve body assembly of claim 7 or 9.

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