Heat management system and method based on multi-way valve and vehicle

Abstract

The invention discloses a heat management system and method based on a multi-way valve and a vehicle. The heat management system comprises an engine waste heat utilization loop, a motor waste heat utilization loop and a refrigerating loop. The engine waste heat utilization loop is used for adjusting the temperature of the passenger compartment and the power battery by utilizing the waste heat of the engine; the motor waste heat utilization loop is used for adjusting the temperature of a passenger compartment and the temperature of an engine through waste heat of a motor; the refrigerating circuit is used for reducing the temperature of the power battery and / or the passenger compartment; the engine waste heat utilization loop, the motor waste heat utilization loop and the warm air core body of the passenger compartment are communicated through the first multi-way valve so as to achieve heat transfer; the engine waste heat utilization loop transmits waste heat of an engine to a passenger compartment and a power battery. The motor waste heat utilization loop transmits waste heat of the motor to the passenger compartment and the engine. The refrigeration circuit reduces the temperature of the power battery and / or the passenger compartment. According to the heat management system, multiple waste heat utilization loops are integrated, a heat management pipeline of the whole vehicle is simplified, and the transmission efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and in particular to a thermal management system, method and vehicle based on a multi-way valve. Background Technology

[0002] In existing technology, engine cooling water pumps and radiator fans are all mechanical components that need to be linked with the engine while it is running. This results in poor controllability, making it impossible to quickly warm up the engine when it is cold, and impossible to quickly cool the engine when it is hot.

[0003] Existing technologies mostly achieve thermal management coordination between systems through reversing valves. However, the thermal management modules of each system are still independent and lack integration, which does not bring any advantages to the overall vehicle layout.

[0004] Existing technology uses motor coolant to heat the power battery through water circuit switching, but does not fully consider the heat source of motor coolant in pure electric mode. Summary of the Invention

[0005] This invention provides a thermal management system, method, and vehicle based on a multi-way valve. A first multi-way valve connects the engine waste heat utilization circuit, the motor waste heat utilization circuit, and the passenger compartment heater core, utilizing the waste heat from the engine and motor to heat the passenger compartment. In hybrid mode, the engine waste heat is used to heat the power battery; in pure electric mode, the motor waste heat is used to heat the engine. A refrigeration circuit also regulates the temperature of the power battery and passenger compartment. The design integrates the pipelines for the engine, motor, power battery, and refrigeration circuit into a multi-way valve, thereby simplifying the vehicle's thermal management pipelines, improving heat transfer efficiency, and enhancing the overall vehicle appearance.

[0006] According to a first aspect of the present invention, a thermal management system based on a multi-way valve is provided, comprising: an engine waste heat utilization circuit, an electric motor waste heat utilization circuit, and a refrigeration circuit;

[0007] The engine waste heat utilization circuit is used to regulate the temperature of the passenger compartment and power battery by utilizing the engine's waste heat.

[0008] The waste heat recovery circuit of the motor is used to regulate the temperature of the passenger cabin and the engine by utilizing the waste heat of the motor.

[0009] The cooling circuit is used to reduce the temperature of the power battery and / or the passenger compartment;

[0010] The first multi-way valve is used to connect the engine waste heat utilization circuit, the motor waste heat utilization circuit and the passenger compartment heating core to achieve heat transfer.

[0011] When the vehicle is running in hybrid mode, the engine waste heat utilization circuit transfers the waste heat of the engine to the passenger compartment and the power battery; when the vehicle is running in pure electric mode, the motor waste heat utilization circuit transfers the waste heat of the motor to the passenger compartment and the engine; when the temperature of the power battery is greater than or equal to a first threshold, and / or the temperature of the passenger compartment is greater than or equal to a second threshold, the cooling circuit reduces the temperature of the power battery and / or the passenger compartment, wherein the first threshold is greater than the second threshold.

[0012] Optionally, a heat exchanger may also be included;

[0013] The first input terminal of the heat exchanger is connected to the waste heat utilization circuit of the motor, the second input terminal of the heat exchanger is connected to the waste heat utilization circuit of the engine, and the output terminal of the heat exchanger is connected to the second multi-way valve.

[0014] The heat exchanger is used to transfer the waste heat of the motor and / or the engine to the heating core of the passenger compartment and / or the power battery through the second multi-way valve.

[0015] Optionally, it may also include a heating device; the heating device includes a car heater and a car heater water pump;

[0016] The input end of the car heater is connected to the heat exchanger, and the output end of the car heater is connected to the second multi-way valve;

[0017] The input end of the car heater water pump is connected to the second multi-way valve, and the output end of the car heater water pump is connected to the heat exchanger.

[0018] The vehicle heater is used to provide auxiliary heating for the passenger compartment and / or the power battery.

[0019] Optionally, the refrigeration circuit includes a cooler;

[0020] The first input terminal of the cooler is connected to the condenser of the passenger compartment, the second input terminal of the cooler is connected to the battery water pump, the first output terminal of the cooler is connected to the power battery, and the second output terminal of the cooler is connected to the electric compressor of the passenger compartment.

[0021] When the temperature of the power battery is greater than or equal to a first threshold, the heat of the power battery is transferred to the battery water pump through the battery coolant, and the battery water pump transfers the battery coolant to the cooler; the cooler is used to exchange the cooling capacity generated by the condenser with the heat of the power battery to achieve cooling of the power battery.

[0022] Optionally, the refrigeration circuit may further include an evaporator;

[0023] The input end of the evaporator is connected to the condenser, and the output end of the evaporator is connected to the electric compressor;

[0024] When the temperature of the passenger cabin is greater than or equal to the second threshold, the evaporator absorbs the heat of the passenger cabin and transfers it to the electric compressor. The electric compressor compresses the heat of the passenger cabin and transfers it to the condenser. The cooling capacity generated by the condenser is transferred to the evaporator to achieve cooling of the passenger cabin.

[0025] Optionally, it may also include an engine cooling circuit; the engine cooling circuit includes an engine radiator;

[0026] The input end of the engine radiator is connected to the first multi-way valve, and the output end of the engine radiator is connected to the engine;

[0027] The engine radiator is used to transfer the heat of the engine to the outside environment in order to cool the engine.

[0028] Optionally, it may also include a motor cooling circuit; the motor cooling circuit includes a motor radiator;

[0029] The input end of the motor radiator is connected to the first multi-way valve, and the output end of the motor radiator is connected to the motor.

[0030] The motor radiator is used to transfer the heat of the motor to the outside world in order to cool the motor.

[0031] According to a second aspect of the present invention, a thermal management method based on a multi-way valve is provided, executed by a thermal management system based on a multi-way valve as described in any of the first aspects of the present invention, the thermal management method comprising:

[0032] Obtain the operating mode of the entire vehicle;

[0033] When the operating mode is hybrid mode, the waste heat of the engine is transferred to the passenger compartment and the power battery through the engine waste heat utilization circuit.

[0034] When the operating mode is pure electric mode, the waste heat of the motor is transferred to the passenger compartment and the engine through the motor waste heat utilization circuit.

[0035] Optionally, after obtaining the vehicle's operating mode, the following may also be included:

[0036] The temperatures of the power battery and the passenger compartment are obtained;

[0037] When the temperature of the power battery is greater than or equal to a first threshold, and / or the temperature of the passenger compartment is greater than or equal to a second threshold, the cooling circuit reduces the temperature of the power battery and / or the passenger compartment, wherein the first threshold is greater than the second threshold.

[0038] According to a third aspect of the invention, a vehicle is provided, including a hybrid power system and a multi-port valve-based thermal management system as described in any of the first aspects of the invention.

[0039] This invention discloses a thermal management system based on a multi-way valve, comprising: an engine waste heat utilization circuit, a motor waste heat utilization circuit, and a cooling circuit; the engine waste heat utilization circuit is used to regulate the temperature of the passenger compartment and the power battery using the engine's waste heat; the motor waste heat utilization circuit is used to regulate the temperature of the passenger compartment and the engine using the motor's waste heat; the cooling circuit is used to reduce the temperature of the power battery and / or the passenger compartment; a first multi-way valve is used to connect the engine waste heat utilization circuit, the motor waste heat utilization circuit, and the passenger compartment's heater core to achieve heat transfer; when the vehicle is running in hybrid mode, the engine waste heat utilization circuit transfers the engine's waste heat to the passenger compartment and the power battery; when the vehicle is running in pure electric mode, the motor waste heat utilization circuit transfers the motor's waste heat to the passenger compartment and the engine; when the temperature of the power battery is greater than or equal to a first threshold, and / or the temperature of the passenger compartment is greater than or equal to a second threshold, the cooling circuit reduces the temperature of the power battery and / or the passenger compartment, wherein the first threshold is greater than the second threshold. The thermal management system based on a multi-way valve provided by this invention connects the engine waste heat utilization circuit, the motor waste heat utilization circuit, and the passenger compartment heating core through a first multi-way valve. This allows the waste heat from the engine and motor to be used to heat the passenger compartment. In hybrid mode, the engine waste heat is used to heat the power battery, and in pure electric mode, the motor waste heat is used to heat the engine. The system also regulates the temperature of the power battery and passenger compartment through a refrigeration circuit. By integrating the pipelines of the engine, motor, power battery, and refrigeration circuit into a multi-way valve design, the thermal management pipeline of the entire vehicle is simplified, heat transfer efficiency is improved, and the overall appearance of the vehicle is enhanced.

[0040] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of a thermal management system based on a multi-way valve provided in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of an engine waste heat utilization circuit in a thermal management system based on a multi-way valve, provided by an embodiment of the present invention.

[0044] Figure 3 This is a schematic diagram of another engine waste heat utilization circuit in a thermal management system based on a multi-way valve, provided by an embodiment of the present invention.

[0045] Figure 4 This is a schematic diagram of a motor waste heat utilization circuit in a thermal management system based on a multi-way valve, provided by an embodiment of the present invention.

[0046] Figure 5 This is a schematic diagram of a motor waste heat utilization circuit in a thermal management system based on a multi-way valve, provided by an embodiment of the present invention.

[0047] Figure 6 This is a schematic diagram of another thermal management system structure based on a multi-way valve provided in an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of a refrigeration circuit in a thermal management system based on a multi-way valve, provided in an embodiment of the present invention.

[0049] Figure 8 This is a schematic diagram of a refrigeration circuit in a thermal management system based on a multi-way valve, provided in an embodiment of the present invention.

[0050] Figure 9 This is a schematic diagram of an engine cooling circuit in a thermal management system based on a multi-way valve, provided by an embodiment of the present invention.

[0051] Figure 10 This is a schematic diagram of a motor cooling circuit in a thermal management system based on a multi-way valve, provided by an embodiment of the present invention.

[0052] Figure 11 This is a flowchart of a thermal management method based on a multi-way valve provided in an embodiment of the present invention;

[0053] Figure 12 This is a flowchart of another thermal management method based on a multi-way valve provided in an embodiment of the present invention. Detailed Implementation

[0054] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and no limitation is imposed herein.

[0057] Figure 1 This is a schematic diagram of a thermal management system based on a multi-way valve provided in an embodiment of the present invention. (Refer to...) Figure 1 The thermal management system based on a multi-way valve provided in this embodiment of the invention includes: an engine waste heat utilization circuit 1, a motor waste heat utilization circuit 2, and a refrigeration circuit 3;

[0058] Engine waste heat utilization circuit 1 is used to regulate the temperature of passenger compartment 4 and power battery 5 by using the waste heat of engine 11.

[0059] The waste heat utilization circuit 2 is used to regulate the temperature of the passenger cabin 4 and the engine 11 by utilizing the waste heat of the motor 21.

[0060] Cooling circuit 3 is used to reduce the temperature of power battery 5 and / or passenger compartment 4;

[0061] The first multi-way valve 6 is used to connect the engine waste heat utilization circuit 1, the motor waste heat utilization circuit 2 and the heating core 41 of the passenger compartment 4 to achieve heat transfer.

[0062] When the vehicle is running in hybrid mode, the engine waste heat utilization circuit 1 transfers the waste heat of the engine 11 to the passenger compartment 4 and the power battery 5; when the vehicle is running in pure electric mode, the motor waste heat utilization circuit 2 transfers the waste heat of the motor 21 to the passenger compartment 4 and the engine 11; when the temperature of the power battery 5 is greater than or equal to a first threshold, and / or the temperature of the passenger compartment 4 is greater than or equal to a second threshold, the cooling circuit 3 reduces the temperature of the power battery 5 and / or the passenger compartment 4, wherein the first threshold is greater than the second threshold.

[0063] The engine waste heat utilization circuit 1 includes an engine 11 and an engine water pump 12; the motor waste heat utilization circuit includes a motor 21 and a motor water pump 22.

[0064] Specifically, the engine waste heat utilization circuit 1 is used to utilize the waste heat generated by the engine 11 during operation to regulate the temperature of the passenger compartment 4 and the power battery 5, thereby achieving the technical effects of heating the passenger compartment 4 and auxiliary heating the power battery 5. Figure 2 This is a schematic diagram of an engine waste heat recovery circuit in a multi-way valve-based thermal management system provided by an embodiment of the present invention. (Refer to...) Figure 2 ,

[0065] When the vehicle is running in hybrid mode, the engine 11 generates a large amount of heat, which is then absorbed by the engine coolant (…). Figure 2 (Not shown) The coolant is carried away and transferred to the engine water pump 12, which accelerates the transfer of engine coolant. It is then transferred to the heat exchanger 7 through the first multi-way valve 6. The heat exchanger 7 exchanges the heat in the engine coolant and transfers it to the heater core 41 in the passenger compartment 4. The heater core 41 operates to transfer the waste heat of the engine 11 to the passenger compartment 4 to heat the space of the passenger compartment 4. The heater core 41 vents part of the cold air in the passenger compartment 4 to the outside through the exhaust pipe through the second three-way valve b3, and another part is transferred to the third three-way valve c3. The other part of the cold air passes through the heat exchanger 7 and is finally transferred back to the engine 11 through the fourth three-way valve d3 to cool the engine 11, thereby heating the passenger compartment 4 and cooling the engine 11. The water tank A replenishes the coolant in the engine waste heat utilization circuit 1 through the first three-way valve a3 and the water supply pipe.

[0066] Figure 3 This is a schematic diagram of an engine waste heat recovery circuit in a multi-way valve-based thermal management system provided by an embodiment of the present invention. (Refer to...) Figure 3 ,

[0067] When the vehicle is running in hybrid mode, the engine 11 generates a large amount of heat, which is then absorbed by the engine coolant (…). Figure 2(Not shown) The coolant is carried away and transferred to the engine water pump 12. The engine water pump 12 accelerates the transfer of engine coolant and transfers it to the heat exchanger 7 through the first multi-way valve 6. The heat exchanger 7 transfers the heat from the engine 11 carried by the engine coolant to the power battery 5 through the fifth three-way valve e3 to heat the power battery 5. The battery coolant generated by the power battery 5 is transferred to the heat exchanger 7 through the sixth three-way valve f3. The heat exchanger 7 exchanges energy between the engine coolant and the battery coolant and finally transfers it back to the engine 11 through the fourth three-way valve d3 to cool the engine 11.

[0068] The above describes the principle by which the engine waste heat utilization circuit 1 provides heat to the passenger compartment 4 and the power battery 5 when the vehicle is running in hybrid mode.

[0069] Figure 4 This is a schematic diagram of a motor waste heat utilization circuit in a thermal management system based on a multi-way valve, provided in another embodiment of the present invention. (Refer to...) Figure 4 ,

[0070] When the vehicle is running in pure electric mode, the motor 21 generates a large amount of heat during operation. The heat generated by the motor 21 is absorbed by the motor coolant ( Figure 4 (Not shown) The coolant is carried away and transferred to the first multi-way valve 6, and then to the heat exchanger 7. The heat exchanger 7 transfers the heat from the motor 21 carried by the motor coolant to the heater core 41 in the passenger compartment 4, thus heating the passenger compartment 4. Part of the cold air generated in the passenger compartment 4 is transferred back to the heat exchanger 7 through the second three-way valve b3 and the third three-way valve c3. The heat exchanger 7 exchanges energy between the motor coolant and the passenger compartment 4, and finally transfers it to the motor water pump 22 through the seventh three-way valve g3 and the eighth three-way valve h3. The motor water pump 22 accelerates the flow of liquid and transfers the cold air to the motor 21 to achieve auxiliary cooling of the motor 21. The water tank A replenishes the coolant to the motor waste heat utilization circuit 2 through the first three-way valve a3 and the water supply pipe. The above is the principle of the motor waste heat utilization circuit 2 heating the passenger compartment 4.

[0071] Figure 5 This is a schematic diagram of a motor waste heat utilization circuit in a thermal management system based on a multi-way valve, provided in an embodiment of the present invention. (Refer to...) Figure 5 ,

[0072] When the vehicle is running in pure electric mode, the motor 21 generates a large amount of heat during operation. The heat generated by the motor 21 is absorbed by the motor coolant ( Figure 5 (Not shown in the image) is carried away and transferred to the first multi-way valve 6, and then transferred to the heat exchanger 7 through the first multi-way valve 6. At the same time, the engine coolant of the engine 11 ( Figure 5(Not shown) is transferred to the heat exchanger 7. At this time, the motor coolant and the engine coolant exchange energy in the heat exchanger 7 at the same time. After the energy exchange, the engine coolant is transferred to the engine 11 through the first multi-way valve 6 and the fourth three-way valve d3. This achieves the technical effect of heating the engine 11 with the waste heat of the motor 21, so as to avoid frequent cold starts of the engine 11 when starting the engine, thereby increasing the performance and life of the engine 11.

[0073] The above describes the principle of how the waste heat utilization circuit 2 of the motor provides heat to the passenger compartment 4 and the engine 11 when the vehicle is running in pure electric mode.

[0074] Continue to refer to Figure 1 The cooling circuit 3 is used to reduce the temperature of the power battery 5 and / or the passenger compartment 4 when the temperature of the power battery 5 is greater than or equal to a first threshold and / or the temperature of the passenger compartment 4 is greater than or equal to a second threshold. The first threshold (e.g., the first threshold is 70°C) is greater than the second threshold (e.g., the second threshold is 30°C).

[0075] Optional, continue to refer to Figures 3-4 The thermal management system based on a multi-way valve provided in this embodiment of the invention also includes a heat exchanger 7;

[0076] The first input end of the heat exchanger 7 is connected to the motor waste heat utilization circuit 2, the second input end of the heat exchanger 7 is connected to the engine waste heat utilization circuit 1, and the output end of the heat exchanger 7 is connected to the second multi-way valve 8.

[0077] The heat exchanger 7 is used to transfer the waste heat of the motor 21 and / or engine 11 to the heating core 41 and / or power battery 5 in the passenger compartment 4 via the second multi-way valve 8.

[0078] Specifically, the thermal management system based on a multi-way valve provided in this embodiment of the invention further includes a heat exchanger 7. The first input end of the heat exchanger 7 is connected to the motor waste heat utilization circuit 2, the second input end of the heat exchanger 7 is connected to the engine waste heat utilization circuit 1, and the output end of the heat exchanger 7 is connected to a second multi-way valve 8. The heat exchanger 7 is used to transfer the waste heat of the motor 21 and / or the engine 11 to the heating core 41 of the passenger compartment 4 and / or the power battery 5 through the second multi-way valve 8. Through the cooperation between the first multi-way valve 6 and the second multi-way valve 8, the thermal management system has a higher degree of integration and a higher heat transfer efficiency.

[0079] Figure 6 This is a schematic diagram of another thermal management system structure based on a multi-way valve provided in an embodiment of the present invention, for reference. Figure 6 Optionally, the thermal management system based on a multi-way valve provided in this embodiment of the invention further includes a heating device 9; the heating device 9 includes an automotive heater and an automotive heater water pump 92.

[0080] The input end of the car heater 91 is connected to the heat exchanger 7, and the output end of the car heater 91 is connected to the second multi-way valve 8;

[0081] The input end of the car heater water pump 92 is connected to the second multi-way valve 8, and the output end of the car heater water pump 92 is connected to the heat exchanger 7.

[0082] The vehicle heater 91 is used to provide auxiliary heating for the passenger compartment 4 and / or the power battery 5.

[0083] Specifically, the thermal management system based on a multi-way valve provided in this embodiment of the invention also includes a heating device 9. The heating device 9 includes an automotive heater 91 and an automotive heater water pump 92. The automotive heater 91 is used to provide auxiliary heating when the engine waste heat utilization circuit 1 heats the passenger compartment 4, and / or when the motor waste heat utilization circuit 2 heats the passenger compartment 4, in order to increase the heating effect on the passenger compartment 4. The automotive heater 91 can be a PTC (Positive Temperature Coefficient), which uses the characteristics of the PTC thermistor element to assist in the heating of the passenger compartment 4. The automotive heater water pump 92 provides power for the flow of coolant to improve the energy transfer efficiency.

[0084] Optional, Figure 7 This is a schematic diagram of a refrigeration circuit in a multi-way valve-based thermal management system provided in an embodiment of the present invention. (Refer to...) Figure 7 The refrigeration circuit 3 in the multi-way valve-based thermal management system provided in this embodiment of the invention includes a cooler 31;

[0085] The first input terminal of the cooler 31 is connected to the condenser 42 in the passenger compartment, the second input terminal of the cooler 31 is connected to the battery water pump 10, the first output terminal of the cooler 31 is connected to the power battery 5, and the second output terminal of the cooler 31 is connected to the electric compressor 43 in the passenger compartment.

[0086] When the temperature of the power battery 5 is greater than or equal to the first threshold, the heat of the power battery 5 is dissipated through the battery coolant ( Figure 7 (Not shown) is transferred to the battery water pump 10, which in turn transfers the battery coolant to the cooler 31. The cooler 31 is used to exchange the cooling capacity generated by the condenser 42 with the heat of the power battery 5 to achieve cooling of the power battery 5.

[0087] Specifically, the thermal management system based on a multi-port valve provided in this embodiment of the invention also includes a cooler 31. The first input end of the cooler 31 is connected to the condenser 42 in the passenger compartment, the second input end of the cooler 31 is connected to the battery water pump 10, the first output end of the cooler 31 is connected to the power battery 5, and the second output end of the cooler 31 is connected to the electric compressor 43 in the passenger compartment.

[0088] When the temperature sensor ( Figure 7 When the temperature of the power battery 5 is detected to be greater than or equal to the first threshold (not shown), the battery coolant carries away the heat from the power battery 5 and transfers it to the first valve F1 through the ninth three-way valve i3 and the thirteenth three-way valve j3. The first valve F1 opens, and the coolant is transferred to the battery water pump 10 and finally flows to the cooler 31. In the cooler 31, there are two independent channels, one for transferring battery coolant and the other for transferring refrigerant. The battery coolant is transferred to the cooler 31 through the first channel, and the cooler 31 transfers the refrigerant to the electric compressor 43 through the second channel. The electric compressor 43 compresses the refrigerant. The gas is compressed into a high-temperature, high-pressure gas. After the compressed high-temperature, high-pressure gas passes through the condenser 42, a portion of the low-temperature, low-pressure refrigerant is transferred to the cooler 31 through the third valve F3 and the second valve F2. In the cooler 31, the battery coolant and the refrigerant exchange heat. The low-temperature, low-pressure refrigerant absorbs the heat from the battery coolant, and at this time the battery coolant becomes a low-temperature battery coolant and flows to the power battery 5, thereby actively cooling the power battery 5. The water storage tank A is connected to the main circulation through the water supply pipe and the exhaust pipe, and is used to accommodate the volume change of the coolant due to thermal expansion and contraction, exhaust the gas, and replenish the coolant.

[0089] Optional, Figure 8 This is a schematic diagram of a refrigeration circuit in a multi-way valve-based thermal management system provided in an embodiment of the present invention. (Refer to...) Figure 8 The refrigeration circuit 3 in the multi-way valve-based thermal management system provided in this embodiment of the invention also includes an evaporator 44;

[0090] The input end of the evaporator 44 is connected to the condenser 42, and the output end of the evaporator 44 is connected to the electric compressor 43;

[0091] When the temperature of the passenger cabin is greater than or equal to the second threshold, the evaporator 44 absorbs the heat of the passenger cabin and transfers it to the electric compressor 43. The electric compressor 43 compresses the heat of the passenger cabin and transfers it to the condenser 42. The cooling capacity generated by the condenser 42 is transferred to the evaporator 44 to achieve cooling of the passenger cabin.

[0092] Specifically, when the temperature in the passenger cabin is greater than or equal to the second threshold, the refrigerant in the cooler 31 is transferred to the electric compressor 43. The electric compressor 43 starts and compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas. The high-temperature, high-pressure gas enters the condenser 32, where it condenses into a medium-temperature, high-pressure liquid. The high-pressure liquid refrigerant flows through the fourth valve F4 and the fifth valve F5 and becomes a low-temperature, low-pressure mist liquid (the fifth valve can be a TXV thermal expansion valve) before entering the evaporator 44. The evaporator 44 absorbs heat from the passenger cabin (i.e., hot air) while receiving the low-temperature, low-pressure refrigerant. In the evaporator 44, the low-temperature, low-pressure refrigerant absorbs heat from the passenger cabin and completely evaporates into a low-temperature, low-pressure gas. The air that has lost heat is cooled and becomes cool air, which enters the passenger cabin to dissipate heat. After absorbing heat from the passenger cabin, the evaporator 44 transfers the refrigerant to the electric compressor 43 again. The electric compressor 43 compresses the refrigerant again before transferring it to the condenser, starting the next cycle.

[0093] Figure 9 This is a schematic diagram of an engine cooling circuit in a multi-way valve-based thermal management system provided by an embodiment of the present invention. (Refer to...) Figure 9 The thermal management system based on a multi-way valve provided in this embodiment of the invention also includes an engine cooling circuit; the engine cooling circuit includes an engine radiator 111;

[0094] The input end of the engine radiator 111 is connected to the first multi-way valve 6, and the output end of the engine radiator 111 is connected to the engine 11.

[0095] The engine radiator 111 is used to transfer the heat of the engine 11 to the outside, so as to cool the engine 11.

[0096] Specifically, the engine 11 generates a large amount of waste heat during operation. The engine coolant transfers this large amount of waste heat to the engine water pump 12, and then to the engine radiator 111 through the first multi-way valve 6. The engine radiator 111 discharges the large amount of waste heat from the engine coolant to the external environment, and then transfers the low-temperature engine coolant back to the engine 11 to enter the next cycle, so as to achieve heat dissipation for the engine 11. The water tank B is used to replenish the stored coolant back to the main circulation when the system cools down and the coolant contracts, so as to keep the system full and avoid air lock.

[0097] Optional, Figure 10 This is a schematic diagram of a motor cooling circuit in a multi-way valve-based thermal management system provided by an embodiment of the present invention; see reference. Figure 10The thermal management system based on a multi-way valve provided in this embodiment of the invention also includes a motor cooling circuit; the motor cooling circuit includes a motor radiator 211; the input end of the motor radiator 211 is connected to the first multi-way valve 6, and the output end of the motor radiator 211 is connected to the motor 21; the motor radiator 211 is used to transfer the heat of the motor 21 to the outside world to achieve cooling of the motor 21.

[0098] Specifically, the motor-water pump 22 starts, and the motor-water pump 22 drives the motor coolant ( Figure 10 (Not shown) The coolant flows in the motor cooling circuit. First, it passes through the motor 21, absorbing the heat generated during operation, causing its temperature to rise. The heated coolant is then sent to the motor radiator 211, which transfers the heat to the outside air, cooling itself and lowering its temperature. The cooled coolant then flows out of the radiator 211 and back into the motor 21 through pipes, completing one motor cooling cycle. The water tank C is used to accommodate the expansion and contraction of the coolant due to temperature changes, maintaining stable system pressure and removing gas from the circulation to prevent air lock.

[0099] Based on the same inventive concept Figure 11 This is a flowchart of a thermal management method based on a multi-way valve provided in an embodiment of the present invention, for reference. Figure 11 The present invention also provides a thermal management method based on a multi-way valve, executed by the thermal management system based on a multi-way valve in any of the above embodiments. The thermal management method includes:

[0100] S101, Obtain the operating mode of the entire vehicle.

[0101] Specifically, the vehicle's current operating mode can be obtained through the vehicle's controller and other equipment, and the heating mode of the passenger compartment can be selected according to the different operating modes.

[0102] S102. When the operating mode is hybrid mode, the waste heat of the engine is transferred to the passenger compartment and the power battery through the engine waste heat utilization circuit.

[0103] Specifically, when the controller detects that the vehicle is operating in hybrid mode, it uses the engine waste heat utilization circuit, that is, the heat generated by the engine during operation, to transfer to the passenger compartment and the power battery to heat the passenger compartment and the power battery at the same time.

[0104] S103. When the operating mode is pure electric mode, the waste heat of the motor is transferred to the passenger compartment and the engine through the motor waste heat utilization circuit.

[0105] Specifically, when the controller detects that the vehicle is operating in pure electric mode, it uses the motor waste heat utilization circuit to transfer the heat generated by the motor during operation to the passenger compartment and the engine, so as to heat the passenger compartment and the engine at the same time.

[0106] The thermal management method based on a multi-way valve provided in this embodiment of the invention can achieve the same technical effect as the thermal management system based on a multi-way valve provided in the above-described embodiments of the invention, and will not be described again here.

[0107] Based on the above embodiments of the invention Figure 12 This is a flowchart of another thermal management method based on a multi-way valve provided in an embodiment of the present invention, for reference. Figure 12 The embodiments of the present invention further refine the process of obtaining the vehicle's operating mode. The thermal management method based on a multi-way valve provided by the embodiments of the present invention includes:

[0108] S201, Obtain the vehicle's operating mode.

[0109] S202, Obtain the temperature of the power battery and passenger compartment.

[0110] Specifically, temperature sensors are used to monitor the operating temperature of the power battery and the temperature inside the passenger cabin in real time.

[0111] S203. When the temperature of the power battery is greater than or equal to the first threshold, and / or the temperature of the passenger compartment is greater than or equal to the second threshold, the cooling circuit reduces the temperature of the power battery and / or the passenger compartment.

[0112] Specifically, when the temperature sensor detects that the temperature of the power battery is greater than or equal to a first threshold, and / or the temperature of the passenger compartment is greater than or equal to a second threshold, the temperature of the power battery and / or the passenger compartment is reduced through the cooling circuit in the thermal management system.

[0113] Based on the same inventive concept, embodiments of the present invention provide a vehicle including a hybrid power system and a multi-port valve-based thermal management system as described in any of the above embodiments.

[0114] The vehicle provided in this embodiment of the invention can achieve the same technical effect as the thermal management system based on a multi-way valve provided in the above-described embodiments of the invention, and will not be described again here.

[0115] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A thermal management system based on a multi-way valve, characterized in that, include: Engine waste heat recovery circuit, motor waste heat recovery circuit and refrigeration circuit; The engine waste heat utilization circuit is used to regulate the temperature of the passenger compartment and power battery by utilizing the engine's waste heat. The waste heat recovery circuit of the motor is used to regulate the temperature of the passenger cabin and the engine by utilizing the waste heat of the motor. The cooling circuit is used to reduce the temperature of the power battery and / or the passenger compartment; The first multi-way valve is used to connect the engine waste heat utilization circuit, the motor waste heat utilization circuit and the passenger compartment heating core to achieve heat transfer. When the vehicle is running in hybrid mode, the engine waste heat utilization circuit transfers the waste heat of the engine to the passenger compartment and the power battery. When the vehicle is running in pure electric mode, the motor waste heat utilization circuit transfers the waste heat of the motor to the passenger compartment and the engine; when the temperature of the power battery is greater than or equal to a first threshold, and / or the temperature of the passenger compartment is greater than or equal to a second threshold, the cooling circuit reduces the temperature of the power battery and / or the passenger compartment, wherein the first threshold is greater than the second threshold.

2. The thermal management system based on a multi-way valve according to claim 1, characterized in that, It also includes heat exchangers; The first input terminal of the heat exchanger is connected to the waste heat utilization circuit of the motor, the second input terminal of the heat exchanger is connected to the waste heat utilization circuit of the engine, and the output terminal of the heat exchanger is connected to the second multi-way valve. The heat exchanger is used to transfer the waste heat of the motor and / or the engine to the heating core of the passenger compartment and / or the power battery through the second multi-way valve.

3. The thermal management system based on a multi-way valve according to claim 2, characterized in that, It also includes a heating device; the heating device includes a car heater and a car heater water pump; The input end of the car heater is connected to the heat exchanger, and the output end of the car heater is connected to the second multi-way valve; The input end of the car heater water pump is connected to the second multi-way valve, and the output end of the car heater water pump is connected to the heat exchanger. The vehicle heater is used to provide auxiliary heating for the passenger compartment and / or the power battery.

4. The thermal management system based on a multi-way valve according to claim 1, characterized in that, The refrigeration circuit includes a cooler; The first input terminal of the cooler is connected to the condenser of the passenger compartment, the second input terminal of the cooler is connected to the battery water pump, the first output terminal of the cooler is connected to the power battery, and the second output terminal of the cooler is connected to the electric compressor of the passenger compartment. When the temperature of the power battery is greater than or equal to the first threshold, the heat of the power battery is transferred to the battery water pump through the battery coolant, and the battery water pump transfers the battery coolant to the cooler. The cooler is used to exchange the cooling capacity generated by the condenser with the heat of the power battery, so as to cool the power battery.

5. The thermal management system based on a multi-way valve according to claim 4, characterized in that, The refrigeration circuit also includes an evaporator; The input end of the evaporator is connected to the condenser, and the output end of the evaporator is connected to the electric compressor; When the temperature of the passenger cabin is greater than or equal to the second threshold, the evaporator absorbs the heat of the passenger cabin and transfers it to the electric compressor. The electric compressor compresses the heat of the passenger cabin and transfers it to the condenser. The cooling capacity generated by the condenser is transferred to the evaporator to achieve cooling of the passenger cabin.

6. The thermal management system based on a multi-port valve according to claim 1, characterized in that, It also includes an engine cooling circuit; the engine cooling circuit includes an engine radiator; The input end of the engine radiator is connected to the first multi-way valve, and the output end of the engine radiator is connected to the engine; The engine radiator is used to transfer the heat of the engine to the outside environment in order to cool the engine.

7. The thermal management system based on a multi-way valve according to claim 1, characterized in that, It also includes a motor cooling circuit; the motor cooling circuit includes a motor radiator; The input end of the motor radiator is connected to the first multi-way valve, and the output end of the motor radiator is connected to the motor. The motor radiator is used to transfer the heat of the motor to the outside world in order to cool the motor.

8. A thermal management method based on a multi-way valve, characterized in that, Performed by the multi-way valve-based thermal management system according to any one of claims 1-7, the thermal management method includes: Obtain the operating mode of the entire vehicle; When the operating mode is hybrid mode, the waste heat of the engine is transferred to the passenger compartment and the power battery through the engine waste heat utilization circuit. When the operating mode is pure electric mode, the waste heat of the motor is transferred to the passenger compartment and the engine through the motor waste heat utilization circuit.

9. The thermal management method based on a multi-way valve according to claim 8, characterized in that, After obtaining the vehicle's operating mode, the following is also included: The temperatures of the power battery and the passenger compartment are obtained; When the temperature of the power battery is greater than or equal to a first threshold, and / or the temperature of the passenger compartment is greater than or equal to a second threshold, the cooling circuit reduces the temperature of the power battery and / or the passenger compartment, wherein the first threshold is greater than the second threshold.

10. A vehicle, characterized in that, This includes a hybrid power system and a multi-port valve-based thermal management system as described in any one of claims 1 to 7.

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