Extended-range automobile thermal management system, control method 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 and an automobile, the range-extended automobile thermal management system comprises a refrigerant loop which at least comprises a gas-liquid separator, a compressor, an outdoor heat exchanger and an evaporator; the high-temperature water loop at least comprises an engine, a high-temperature radiator, a warm core and a water heater; the low-temperature water loop at least comprises a battery, a motor and a low-temperature heat exchanger; and a water cooling condenser, a liquid-liquid exchanger and a battery cooler. Wherein heat exchange between the refrigerant loop and the high-temperature water loop is achieved through the water-cooling condenser, heat exchange between the high-temperature water loop and the low-temperature water loop is achieved through the liquid-liquid exchanger, and heat exchange between the refrigerant loop and the low-temperature water loop is achieved through the battery cooler. The problem that energy of the whole vehicle is wasted and energy consumption of the whole vehicle is increased due to the fact that heat of the engine is not used is solved, and comprehensive utilization of the energy of the whole vehicle is achieved.

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, and vehicle. Background Technology

[0002] With the development of the automotive industry, range-extended electric vehicles (REEVs) have overcome the high operating costs of traditional gasoline vehicles and solved the range anxiety problem of pure electric vehicles. As REEVs have developed, their thermal management systems have become increasingly important. Compared to traditional gasoline vehicles that rely solely on the engine to provide heat to the passenger compartment, this approach is not feasible, especially in spring, autumn, and winter conditions south of the Yangtze River, where ambient and motor heat are not fully utilized, resulting in low energy efficiency.

[0003] Currently, there is no mature thermal management system for range-extended electric vehicles that can distribute the waste heat of the entire vehicle. The main solutions to this problem are: ① relying entirely on engine heat to heat the battery and passenger compartment. This method still has the disadvantage of slow cold start of traditional vehicles; ② relying entirely on the refrigerant system or electric heater to heat the passenger compartment and battery. This method does not utilize the engine heat, resulting in energy waste and increased energy consumption of the entire vehicle.

[0004] Furthermore, with the development of electric vehicle integration, more and more vehicles are choosing integrated cooling valve module systems. Although high integration allows a single valve module to perform multiple functions, it places high demands on the vehicle's layout, leading to higher subsequent maintenance costs. Summary of the Invention

[0005] 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 and vehicle, which solves the problem of wasted vehicle energy and increased vehicle energy consumption caused by unused engine heat, and realizes the comprehensive utilization of vehicle energy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] The first aspect of this invention provides a thermal management system for a range-extended electric vehicle, comprising: a refrigerant circuit, including at least a gas-liquid separator, a compressor, an outdoor heat exchanger, and an evaporator; a high-temperature water circuit, including at least an engine, a high-temperature radiator, a heater core, and a water heater; a low-temperature water circuit, including at least a battery, a motor, and a low-temperature heat exchanger; and a water-cooled condenser, a liquid-liquid exchanger, and a battery cooler; wherein heat exchange between the refrigerant circuit and the high-temperature water circuit is achieved through the water-cooled condenser, heat exchange between the high-temperature water circuit and the low-temperature water circuit is achieved through the liquid-liquid exchanger, and heat exchange between the refrigerant circuit and the low-temperature water circuit is achieved through the battery cooler.

[0008] As an optional implementation, the range-extended vehicle thermal management system further includes: in passenger compartment dehumidification mode: in the refrigerant circuit, the refrigerant flows through the gas-liquid separator, compressor, water-cooled condenser, and outdoor heat exchanger, then through the evaporator; in the high-temperature water circuit, a portion of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater, and heating core.

[0009] As an optional implementation, the range-extended vehicle thermal management system further includes: in passenger compartment heating mode: in the high-temperature water circuit, a portion of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater and heater core.

[0010] As an optional implementation, the range-extended vehicle thermal management system further includes: in battery heating mode: in the high-temperature water circuit, a portion of the coolant flowing out of the engine returns to the engine through the high-temperature radiator, and another portion returns to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater, and heater core; and In the low-temperature water circuit, part of the coolant flowing out of the battery flows back to the battery through the battery cooler, and the other part flows back to the battery through the liquid-liquid exchanger.

[0011] As an optional implementation, the range-extended vehicle thermal management system further includes an electronic thermostat for controlling the proportion of coolant flowing from the engine based on a passenger compartment dehumidification mode, a passenger compartment heating mode, and / or a battery heating mode.

[0012] As an optional implementation, the range-extended vehicle thermal management system further includes: a first three-way valve, a second three-way valve, and a third three-way valve, wherein the first three-way valve is located in a high-temperature water circuit, and the second and third three-way valves are located in a low-temperature water circuit.

[0013] A second aspect of the present invention provides a thermal management system for a range-extended vehicle, comprising: an engine circuit, including at least an engine, a high-temperature radiator, a main heat exchanger, a water-cooled condenser, and a heater core; in the engine circuit, a portion of the coolant flowing out of the engine flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the heater core.

[0014] As an optional implementation, the range-extended vehicle thermal management system further includes: in passenger cabin dehumidification mode: refrigerant flows through the gas-liquid separator, compressor, water-cooled condenser, and outdoor heat exchanger to the evaporator; part of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and the other part flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater, and heating core.

[0015] As an optional implementation, the range-extended vehicle thermal management system further includes: in passenger compartment heating mode: a portion of the coolant flowing out of the engine flows back to the engine through a high-temperature radiator, and another portion flows back to the engine through a liquid-liquid exchanger, a water-cooled condenser, a water heater, and a heater core.

[0016] As an optional implementation, the range-extended vehicle thermal management system further includes: in battery heating mode: a portion of the coolant flowing out of the engine returns to the engine through a high-temperature radiator, and another portion returns to the engine through a liquid-liquid exchanger, a water-cooled condenser, a water heater, and a heater core; and Part of the coolant flowing out of the battery flows back to the battery through the battery cooler, and the other part flows back to the battery through the liquid-liquid exchanger.

[0017] A third aspect of the present invention provides a thermal management control method for a range-extended vehicle, which is applied to the thermal management system of a range-extended vehicle as described in the first or second aspect of the present invention.

[0018] A fourth aspect of the present invention provides an automobile, characterized in that it includes an automobile thermal management system as described in the first or second aspect of the present invention.

[0019] This invention has at least the following technical effects: 1. This invention, by involving the refrigerant circuit and related coolant circuit, solves the problem of unused engine heat causing energy waste and increased vehicle energy consumption, and achieves comprehensive utilization of vehicle energy; 2. This invention utilizes the heat exchange function of shared components between circuits to achieve direct or indirect heat exchange between different circuits, and replaces valve modules or highly integrated valve bodies with a small number of simple valve bodies, reducing the difficulty of design layout and subsequent maintenance and integration. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a circuit diagram of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the passenger compartment cooling (pure electric) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0023] Figure 3This is a schematic diagram of the passenger compartment cooling (range extension) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the passenger compartment dehumidification (pure electric) mode of a range-extended electric vehicle thermal management system according to an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the passenger compartment dehumidification (range extension) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the passenger compartment heating (pure electric) mode of a range-extended electric vehicle thermal management system according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram of the passenger compartment heating (range extension) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the battery cooling (pure electric) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the battery cooling (range extension) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0030] Figure 10 This is a schematic diagram of the battery air-cooled (pure electric) mode of the thermal management system for a range-extended electric vehicle according to an embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of the battery air-cooling (range-extending) mode of a range-extending vehicle thermal management system according to an embodiment of the present invention.

[0032] Figure 12 This is a schematic diagram of the battery heating (pure electric) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0033] Figure 13 This is a schematic diagram of the battery heating (range extension) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0034] Figure 14 This is a schematic diagram of the electric drive cooling (pure electric) mode of the thermal management system for a range-extended electric vehicle according to an embodiment of the present invention.

[0035] Figure 15 This is a schematic diagram of the electric drive cooling (range extension) mode of a range-extended vehicle thermal management system according to an embodiment of the present invention.

[0036] Figure 16 This is a schematic diagram of the motor heating battery (pure electric) mode of the thermal management system for a range-extended vehicle according to an embodiment of the present invention.

[0037] Figure Labels 1-Electronic thermostat; 2-First one-way water pump; 3-Second one-way water pump; 4-Third one-way water pump; 5-Fourth one-way water pump; 6-First three-way valve; 7-Second three-way valve; 8-Third three-way valve. Detailed Implementation

[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. 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.

[0039] It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of embodiments in 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. The illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the type, quantity, and proportion of each component can be arbitrarily changed, and the component layout may also be more complex.

[0040] like Figure 1 As shown, the first aspect of the present invention provides a thermal management system for a range-extended electric vehicle, comprising: The refrigerant circuit includes at least a gas-liquid separator, a compressor, an outdoor heat exchanger, and an evaporator; The high-temperature water circuit includes at least an engine, a high-temperature radiator, a heating element, and a water heater. The cryogenic water circuit includes at least a battery, a motor, and a cryogenic heat exchanger; In addition to water-cooled condensers, liquid-liquid exchangers, and battery coolers; Specifically, the heat exchange between the refrigerant circuit and the high-temperature water circuit is achieved through the water-cooled condenser, the heat exchange between the high-temperature water circuit and the low-temperature water circuit is achieved through the liquid-liquid exchanger, and the heat exchange between the refrigerant circuit and the low-temperature water circuit is achieved through the battery cooler.

[0041] Specifically, by integrating the refrigerant circuit, high-temperature water circuit, and low-temperature water circuit, the heating of areas such as the passenger compartment and battery by the engine, motor, and ambient heat is achieved, realizing the comprehensive utilization of the vehicle's energy.

[0042] In one embodiment of the present invention, the range-extended vehicle thermal management system further includes an electronic thermostat 1, a first one-way water pump 2, a second one-way water pump 3, a third one-way water pump 4, a fourth one-way water pump 5, a first three-way valve 6, a second three-way valve 7, and a third three-way valve 8. The electronic thermostat 1, the first one-way water pump 2, the second one-way water pump 3, and the first three-way valve 6 are located in the high-temperature water circuit, while the third one-way water pump 4, the fourth one-way water pump 5, the second three-way valve 7, and the third three-way valve 8 are located in the low-temperature water circuit.

[0043] Specifically, the electronic thermostat 1 has two ports, the left side being the first port and the right side being the second port; the first port of the electronic thermostat is connected to the high-temperature heat exchanger, and the second port is connected to the first port of the first three-way valve 6.

[0044] Specifically, the first one-way water pump 2, the second one-way water pump 3, the third one-way water pump 4, and the fourth one-way water pump 5 each have corresponding inlet and outlet ports. See details below. Figure 1-16 .

[0045] Specifically, the first three-way valve 6, the second three-way valve 7, and the third three-way valve 8 each have three ports: the first port on the left, the second port in the middle, and the third port on the right.

[0046] Specifically, the first port of the first three-way valve 6 is connected to the first port of the electronic thermostat 1, the second port is connected to the second one-way water pump 3, and the third port is connected to the heating element.

[0047] Specifically, the first port of the second three-way valve 7 is connected to the low-temperature radiator, the second port is connected to the engine, and the third port is connected to the junction of the battery cooler, the motor, and the liquid-liquid heat exchanger.

[0048] Specifically, the first port of the third three-way valve 8 is connected to the low-temperature radiator, the second port is connected to the motor, and the third port is connected to the liquid-liquid heat exchanger.

[0049] All components in the diagram are schematic only and do not represent the actual dimensions and positions of the components. To better illustrate the content and connections of each component in conjunction with the diagram, Table 1 below is provided for explanation: abbreviation meaning LCC Water-cooled condenser OHX Outdoor heat exchanger ACCU gas-liquid separator EXV Electronic expansion valve ERV Refrigerant solenoid valve SOV Solenoid switch valve Chiller Battery cooler EVAP Evaporator HC Warm Core PHX Liquid-liquid heat exchanger HTR High temperature radiator LTR Low temperature heat sink ESS Battery EDS motor Eng system engine WPTC Water heater

[0050] The ERV is a large-diameter throttling valve located between the LCC and OHX. In heat pump mode, it acts as a throttling valve, while in cooling mode, it is fully open, essentially functioning as a section of piping. The SOV is a loop on / off valve. In heat pump mode, the SOV is open, allowing refrigerant to exit from the OHX and return to the compressor via the SOV, completing the cycle. In cooling mode, the SOV is closed, allowing refrigerant to exit from the OHX and pass through the EXV into the EVAP to cool the passenger cabin.

[0051] It should be noted that all components involved in this invention are their existing functions, and those skilled in the art can clearly understand their meanings, arrangements, and methods based on their technical terms or descriptions in the text, so they will not be elaborated further here.

[0052] In this invention, multiple three-way valves and electronic thermostats are used to heat the battery and passenger compartment by utilizing engine heat. This improves upon the shortcomings of relying solely on the refrigerant system or electric heaters to heat the passenger compartment and battery, reduces energy waste in the vehicle, lowers overall vehicle energy consumption, and achieves comprehensive utilization of vehicle energy.

[0053] To better illustrate the differences between pure electric and range-extended electric vehicles under various operating conditions, the technical solution of this invention will be compared and explained below through specific embodiments, following the order of passenger compartment, battery, and electric drive motor.

[0054] like Figure 2 As shown, it illustrates the passenger compartment cooling (pure electric) mode of the thermal management system for a range-extended electric vehicle, in which passenger compartment cooling is mainly achieved through the refrigerant circuit.

[0055] like Figure 3 As shown, it illustrates the passenger compartment cooling (range-extending) mode of the thermal management system for a range-extended vehicle. In this mode, passenger compartment cooling is mainly achieved through the refrigerant circuit, and the engine is cooled by a high-temperature radiator.

[0056] like Figure 4 As shown, it illustrates the passenger compartment dehumidification (pure electric) mode of the thermal management system of a range-extended electric vehicle. In this mode, cooling and dehumidification are achieved by relying on the refrigerant circuit and temperature compensation is achieved by relying on the high-temperature water circuit, thereby ultimately achieving dehumidification of the passenger compartment.

[0057] like Figure 5 As shown, it illustrates the passenger compartment dehumidification (range-extending) mode of the thermal management system for a range-extended vehicle. In this mode, it is achieved through the collaborative operation of a refrigerant circuit and a high-temperature water circuit, including: In the refrigerant circuit, the refrigerant flows through the gas-liquid separator, compressor, water-cooled condenser, and outdoor heat exchanger, then through the evaporator; the heat exchange effect of the water-cooled condenser is utilized. In the high-temperature water circuit, part of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and the other part flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater and heater core.

[0058] Specifically, the passenger cabin is heated by utilizing the heat from the engine. The process includes: in the refrigerant circuit, the refrigerant flows through the gas-liquid separator, compressor, water-cooled condenser, refrigerant solenoid valve, outdoor heat exchanger, and electronic expansion valve, passing through the evaporator; with the help of heat exchange in the water-cooled condenser, under the control of the electronic thermostat 1, part of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator and the first one-way water pump 2, and the other part flows back to the engine through the first three-way valve 6, liquid-liquid exchanger, second one-way water pump 3, water-cooled condenser, water heater, heater core, and the first one-way water pump 2; and part of the coolant flowing out of the battery flows back to the battery through the battery cooler and the fourth one-way water pump 5, and the other part flows back to the battery through the liquid-liquid exchanger and the fourth one-way water pump 5, thus achieving dehumidification of the passenger cabin.

[0059] In this way, engine heat is used to participate in the dehumidification of the passenger cabin, thereby improving the utilization efficiency of the passenger cabin dehumidification mode.

[0060] like Figure 6 As shown, it illustrates the passenger compartment heating (pure electric) mode of the range-extended vehicle's thermal management system. In this mode, passenger compartment heating is achieved solely by relying on the heat generated by the refrigerant circuit to exchange heat with the heating core through a water-cooled condenser.

[0061] like Figure 7 As shown, it illustrates the passenger compartment heating (range-extending) mode of the thermal management system for a range-extended vehicle. In this mode, in the high-temperature water circuit, part of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and the other part flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater, and heater core.

[0062] Specifically, the process of heating the passenger cabin by utilizing the heat from the engine includes the following steps: Under the control of the electronic thermostat 1, a portion of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator and the first one-way water pump 2, while the other portion flows back to the engine through the first three-way valve 6, the liquid-liquid exchanger, the second one-way water pump 3, the water-cooled condenser, the water heater, the heater core, and the first one-way water pump 2.

[0063] This method enables passenger compartment heating to be achieved solely using engine heat, reducing overall vehicle heating costs.

[0064] like Figure 8 As shown, it illustrates the battery cooling (range-extending) mode of the thermal management system for a range-extended vehicle, in which heat exchange between the refrigerant circuit and the cryogenic water circuit is achieved through a battery cooler, thereby cooling the battery.

[0065] like Figure 9As shown, it illustrates the battery cooling (pure electric) mode of the thermal management system of a range-extended vehicle. In this mode, the battery is cooled by heat exchange between the refrigerant circuit and the low-temperature water circuit through the battery cooler, and the engine is cooled by the high-temperature radiator.

[0066] like Figure 10 As shown, it illustrates the battery air-cooled (pure electric) mode of the thermal management system of a range-extended vehicle, in which battery air cooling is achieved through a low-temperature radiator and the like.

[0067] like Figure 11 As shown, it illustrates the battery air-cooled (range-extending) mode of the thermal management system of a range-extended vehicle. In this mode, the battery is air-cooled by a low-temperature radiator and the engine is cooled by a high-temperature radiator.

[0068] like Figure 12 As shown, it illustrates the battery heating (pure electric) mode of the thermal management system of a range-extended vehicle. In this mode, heat is transferred from the water-cooled condenser to the high-temperature water circuit via the refrigerant circuit, and then the heat from the high-temperature water circuit is transferred to the low-temperature water circuit via the liquid-liquid heat exchanger. This method has low thermal efficiency and high heating cost.

[0069] like Figure 13 As shown, it illustrates the battery heating (range-extending) mode of the thermal management system of a range-extended vehicle. In this mode, in the high-temperature water circuit, a portion of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater, and warm core. In the low-temperature water circuit, a portion of the coolant flowing out of the battery flows back to the battery through the battery cooler, and another portion flows back to the battery through the liquid-liquid exchanger.

[0070] Specifically, the battery is heated by utilizing the heat from the engine. The process includes: under the control of the electronic thermostat 1, a portion of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator and the first one-way water pump 2, while the other portion flows back to the engine through the first three-way valve 6, the liquid-liquid exchanger, the second one-way water pump 3, the water-cooled condenser, the water heater, the heater core, and the first one-way water pump 2; and a portion of the coolant flowing out of the battery flows back to the battery through the battery cooler and the fourth one-way water pump 5, while the other portion flows back to the battery through the liquid-liquid exchanger and the fourth one-way water pump 5, thus heating the battery.

[0071] like Figure 14 As shown, it illustrates the electric drive cooling (pure electric) mode of the thermal management system of a range-extended vehicle. In this mode, heat exchange is achieved from the low-temperature water circuit to the refrigerant circuit through the battery cooler, thereby cooling the electric drive.

[0072] like Figure 15As shown, it illustrates the electric drive cooling (range extender) mode of the thermal management system of a range-extended vehicle. In this mode, heat exchange between the low-temperature water circuit and the refrigerant circuit is achieved through the battery cooler, thereby cooling the electric drive, and heat dissipation from the engine is achieved through the high-temperature radiator.

[0073] like Figure 16 As shown, it illustrates the motor-heated battery (pure electric) mode of the thermal management system of a range-extended vehicle. In this mode, part of the coolant flowing out of the motor returns to the motor through the battery cooler, and part of it flows back to the motor after bringing heat to the battery through the battery, thereby achieving motor-heated battery.

[0074] Since the electric motor is not needed to heat the battery, and the battery is heated by the engine, the electric motor-heated battery (pure electric) mode of the range-extended vehicle's thermal management system is no longer shown.

[0075] By comparing the operating paths and conditions in pure electric mode and range-extended mode under various scenarios, this invention can make full use of engine heat to improve the shortcomings of relying entirely on the refrigerant system or electric heater to heat the passenger compartment and battery, reduce the waste of vehicle energy, lower vehicle energy consumption, and realize the comprehensive utilization of vehicle energy.

[0076] A second aspect of the present invention provides a thermal management system for a range-extended electric vehicle, comprising: The engine circuit includes at least the engine, high-temperature radiator, main heat exchanger, water-cooled condenser, and heating element; In the engine circuit, a portion of the coolant flowing out of the engine flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater, and heating element.

[0077] In one embodiment of the present invention, the heat output logic of the engine circuit is used to output specific application scenarios in modes such as passenger cabin dehumidification mode, passenger cabin heating mode, and battery heating mode.

[0078] In passenger cabin dehumidification mode: refrigerant flows through the gas-liquid separator, compressor, water-cooled condenser, outdoor heat exchanger and evaporator; part of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and the other part flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater and heating core.

[0079] In passenger cabin heating mode: part of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and the other part flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater and heating core.

[0080] In battery heating mode: part of the coolant flowing out of the engine flows back to the engine through the high-temperature radiator, and the other part flows back to the engine through the liquid-liquid exchanger, water-cooled condenser, water heater and warm core; and part of the coolant flowing out of the battery flows back to the battery through the battery cooler, and the other part flows back to the battery through the liquid-liquid exchanger.

[0081] In this invention, engine heat is used to heat the battery and passenger compartment, thereby improving upon the shortcomings of relying solely on the refrigerant system or electric heaters to heat the passenger compartment and battery, reducing the waste of vehicle energy, lowering vehicle energy consumption, and realizing the comprehensive utilization of vehicle energy.

[0082] A third aspect of the present invention provides a thermal management control method for a range-extended vehicle, characterized in that it is applied to the thermal management system of a range-extended vehicle as described in any of the above embodiments.

[0083] Here, by involving the refrigerant circuit and related coolant circuit, the problem of unused engine heat causing energy waste and increased vehicle energy consumption is solved, and the comprehensive utilization of vehicle energy is realized. By utilizing the heat exchange function of shared components between circuits, direct or indirect heat exchange between different circuits is realized, and valve modules or highly integrated valve bodies are replaced by a small number of simple valve bodies, reducing the difficulty of design layout and subsequent maintenance and integration.

[0084] A fourth aspect of the present invention provides an automobile including an automobile thermal management system as described in any of the above embodiments.

[0085] This document has generally described the systems and methods in detail to aid in understanding the invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention can be practiced without one or more specific details, or using other means, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0086] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

[0087] 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, Comprising: a refrigerant circuit comprising at least a gas-liquid separator, a compressor, an outdoor heat exchanger, and an evaporator; a high-temperature water circuit comprising at least an engine, a high-temperature radiator, a warm core, and a water heater; a low-temperature water circuit comprising at least a battery, an electric motor, and a low-temperature heat exchanger; a water-cooled condenser, a liquid-liquid exchanger, and a battery cooler; wherein heat exchange between the refrigerant circuit and the high-temperature water circuit is achieved by the water-cooled condenser, heat exchange between the high-temperature water circuit and the low-temperature water circuit is achieved by the liquid-liquid exchanger, and heat exchange between the refrigerant circuit and the low-temperature water circuit is achieved by the battery cooler.

2. The range extended vehicle thermal management system of claim 1, wherein, Comprising: in a passenger cabin dehumidification mode: in the refrigerant circuit, refrigerant flows through the gas-liquid separator, the compressor, the water-cooled condenser, the outdoor heat exchanger, and the evaporator; in the high-temperature water circuit, a portion of the cooling liquid flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion of the cooling liquid flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the warm core.

3. The range extended vehicle thermal management system of claim 1, wherein, Comprising: in a passenger cabin heating mode: in the high-temperature water circuit, a portion of the cooling liquid flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion of the cooling liquid flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the warm core.

4. The range extended vehicle thermal management system of claim 1, wherein, Comprising: in a battery heating mode: in the high-temperature water circuit, a portion of the cooling liquid flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion of the cooling liquid flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the warm core; and in the low-temperature water circuit, a portion of the cooling liquid flowing out of the battery flows back to the battery through the battery cooler, and another portion of the cooling liquid flows back to the battery through the liquid-liquid exchanger.

5. The extended-range automotive thermal management system of any one of claims 2-4, wherein, Further comprising an electronic thermostat for controlling the proportion of the cooling liquid flowing out of the engine according to the passenger cabin dehumidification mode, the passenger cabin heating mode, and / or the battery heating mode.

6. The extended-range automotive thermal management system of any one of claims 2-4, wherein, Further comprising a first three-way valve, a second three-way valve, and a third three-way valve, wherein the first three-way valve is in the high-temperature water circuit, and the second three-way valve and the third three-way valve are in the low-temperature water circuit.

7. A range extended vehicle thermal management system, characterized in that, Comprising: an engine circuit comprising at least an engine, a high-temperature radiator, a main exchanger, a water-cooled condenser, and a warm core; in the engine circuit, a portion of the cooling liquid flowing out of the engine flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the warm core.

8. The range extended electric vehicle thermal management system of claim 7, wherein, Comprising: in a passenger cabin dehumidification mode: refrigerant flows through the gas-liquid separator, the compressor, the water-cooled condenser, the outdoor heat exchanger, and the evaporator; a portion of the cooling liquid flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion of the cooling liquid flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the warm core.

9. The range extended electric vehicle thermal management system of claim 7, wherein, Comprising: in a passenger cabin heating mode: a portion of the cooling liquid flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion of the cooling liquid flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the warm core.

10. The range extended vehicle thermal management system of claim 7, wherein, Comprising: in a battery heating mode: a portion of the cooling liquid flowing out of the engine flows back to the engine through the high-temperature radiator, and another portion of the cooling liquid flows back to the engine through the liquid-liquid exchanger, the water-cooled condenser, the water heater, and the warm core; and Part of the coolant flowing out of the battery flows back to the battery through the battery cooler, and another part of the coolant flows back to the battery through the liquid-liquid exchanger.

11. A method for controlling thermal management of a range extended vehicle, the method comprising: The application is applied to the thermal management system of the range extended vehicle as claimed in any one of claims 1 to 9.

12. An automobile characterized by comprising: The application includes the thermal management system of the vehicle as claimed in claims 1 to 9. The application includes the thermal management system of the vehicle as claimed in claims 1 to 9.

Images