Thermal management system of hybrid electric vehicle and hybrid electric vehicle

Abstract

The invention provides a hybrid electric vehicle thermal management system and a hybrid electric vehicle, and relates to the technical field of vehicle thermal management. In the hybrid electric vehicle thermal management system, an eight-way valve, a four-way valve and two three-way valves are adopted, and a high-temperature loop, a low-temperature loop, a warm air loop and a battery loop are connected in series; cooperative use of multiple heat sources (an engine, an electric drive component and a high-voltage electric heater) can be achieved, various heat sources are effectively utilized to heat a passenger compartment and a battery, the energy utilization rate is high, in addition, the integration level of the structure is high, the number of parts can be effectively reduced, and cost is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile thermal management, and in particular to a hybrid electric vehicle thermal management system and a hybrid electric vehicle. Background Art

[0002] In a new era of rapid technological and economic development, the automotive industry is experiencing unprecedented technological innovation and consumer upgrades. Modern consumers' demands for vehicles have shifted from basic transportation to a comprehensive pursuit of personalized experiences, intelligent technology, and ultimate comfort. This trend places higher demands on automotive thermal management systems—simply temperature regulation is no longer sufficient; systems must evolve towards refined energy management.

[0003] First, energy utilization. Currently, passenger compartment and battery heating mostly utilizes engine waste heat or high-voltage electric heaters, but the use of electric drive waste heat, which is directly released into the air, is generally not considered. Meanwhile, battery heating typically utilizes a heat exchanger for secondary heating, but water-to-water plate heat exchangers present a significant energy efficiency bottleneck: thermodynamic losses during the secondary heat exchange process result in approximately 15%-25% of the available energy not being effectively utilized. This traditional architecture not only wastes valuable thermal energy, but also falls short of the energy efficiency standards of the carbon neutral era.

[0004] Secondly, the integration of water systems is an inevitable trend in the development of thermal management technology. Modern equipment has extremely high requirements for compactness and lightweightness. A key component of this integrated water system is the water multi-way valve, which dynamically adjusts the coolant flow direction, flow rate, and circuit switching, thereby achieving precise thermal management under complex operating conditions.

[0005] In summary, the traditional hybrid vehicle thermal management system has technical problems such as energy waste and low level of integration. Summary of the Invention

[0006] In view of this, an object of the present invention is to provide a hybrid vehicle thermal management system and a hybrid vehicle, so as to alleviate the technical problems of energy waste and low level of integration in traditional hybrid vehicle thermal management systems.

[0007] In a first aspect, an embodiment of the present invention provides a hybrid electric vehicle thermal management system, comprising: a refrigerant circuit and a coolant circuit; The coolant circuit includes: a high-temperature circuit, a low-temperature circuit, a heater circuit, and a battery circuit, and the heat sources in the coolant circuit include: an engine, an electric drive component, and a high-voltage electric heater, so as to heat the passenger compartment and the battery through the engine, the electric drive component, and the high-voltage electric heater via a heater core in the coolant circuit; The high-temperature circuit, the low-temperature circuit, the warm air circuit and the battery circuit are connected in series via an eight-way valve, a four-way valve and two three-way valves.

[0008] Furthermore, the refrigerant circuit includes: a first circuit consisting of a compressor, a condenser, a first PT sensor, a coaxial tube, a stop valve-thermal expansion valve, an evaporator, and a second PT sensor connected by pipelines, and a first branch consisting of an electronic expansion valve, a battery cooler, and a third PT sensor connected by pipelines, one end of the first branch is connected to the outlet pipeline of the coaxial tube, and the other end is connected to the outlet pipeline of the evaporator.

[0009] Furthermore, the high-temperature circuit and the warm air circuit are coupled and designed to include: a second circuit consisting of an engine connected by a pipeline and a high-temperature radiator, the engine connected by a pipeline, the eighth port of the eight-way valve, the first port of the eight-way valve, the V2th port of the four-way valve, the V3th port of the four-way valve, a high-voltage electric heater, a first electronic water pump, the V2th port of the first three-way valve, the V1th port of the first three-way valve, a warm air core, the V4th port of the four-way valve, the V1th port of the four-way valve, a third circuit consisting of a second branch consisting of a pipeline, and a high-temperature expansion kettle, one end of the second branch being connected to the V3th port of the first three-way valve by a pipeline, and the other end being connected to the third port of the eight-way valve by a pipeline, one end of the high-temperature expansion kettle being connected to the engine pipeline, and the other end being connected to the high-temperature radiator; The low-temperature circuit includes: an electric drive component connected by pipelines, a V2 port of the second three-way valve, a V1 port of the second three-way valve, a low-temperature radiator, the sixth port of the eight-way valve, the seventh port of the eight-way valve, a first water temperature sensor, a second electronic water pump forming a fourth circuit, a third branch formed by pipelines, and a fourth branch formed by a low-temperature expansion kettle connected by pipelines, one end of the third branch being connected to the V3 port of the second three-way valve via a pipeline, and the other end being connected to the sixth port of the eight-way valve via a pipeline, one end of the fourth branch being connected to one end of the first water temperature sensor, and the other end being connected to the low-temperature radiator; The battery circuit includes: a fifth circuit consisting of a battery connected by a pipeline, a third water temperature sensor, the fourth port of the eight-way valve, the third port of the eight-way valve, a third electronic water pump, and a second water temperature sensor; a sixth circuit consisting of a battery cooler connected by a pipeline, the second port of the eight-way valve, and the fifth port of the eight-way valve; and a fifth branch consisting of a low-temperature expansion kettle connected by a pipeline. One end of the fifth branch is connected to the fourth port of the eight-way valve, and the other end is connected to the low-temperature radiator.

[0010] Furthermore, when the passenger compartment is heated by the engine, hot water from the engine enters the eighth port of the eight-way valve port, then flows through the first port of the eight-way valve through the internal flow channel and enters the V2th port and the V3th port of the four-way valve, then flows through the V2th port and the V1th port of the first three-way valve, the V3th port is closed, and then enters the heater core, and then flows through the V4th port and the V1th port of the four-way valve and returns to the engine; When the passenger compartment is heated by the electric drive component, the hot water of the electric drive component flows through the V2nd port and the V3nd port of the second three-way valve, enters the sixth port of the eight-way valve, enters the first port of the eight-way valve through the internal flow passage, flows through the V2nd port and the V3nd port of the four-way valve, passes through the V2nd port and the V1st port of the first three-way valve, enters the heater core, then flows through the V4th port and the V1st port of the four-way valve, flows through the engine, returns to the eighth port of the eight-way valve, and then enters the seventh port of the eight-way valve through the internal flow passage of the eight-way valve and returns to the electric drive component; When the passenger compartment is heated by the high-voltage electric heater, the hot water of the high-voltage electric heater flows through the V2 port and the V1 port of the first three-way valve, the V3 port is closed, and then flows through the heater core, and the hot air is blown into the passenger compartment for heating by the blower, and then flows through the V4 port and the V3 port of the four-way valve back to the high-voltage electric heater.

[0011] Furthermore, when the battery is heated by the engine, hot water from the engine enters the third port of the eight-way valve from the eighth port of the eight-way valve, flows through the battery to heat the battery, then enters the first port of the eight-way valve from the fourth port of the eight-way valve, passes through the V2th port and the V1th port of the four-way valve, and then returns to the engine. When the electric drive component heats the battery, the hot water of the electric drive component flows through the V2 port and the V3 port of the second three-way valve, enters the sixth port of the eight-way valve, then enters the third port of the eight-way valve through the flow passage inside the eight-way valve, flows through the battery to heat the battery, enters the fourth port of the eight-way valve, then enters the seventh port of the eight-way valve through the flow passage inside the eight-way valve, and returns to the electric drive component. When the battery is heated by the high-voltage electric heater, the hot water of the high-voltage electric heater flows through the V2 port and the V3 port of the first three-way valve, the V1 port is closed, flows through the battery to heat the battery, and then flows through the fourth port of the eight-way valve, flows out from the first port of the eight-way valve into the V2 port and the V3 port of the four-way valve, and returns to the high-voltage electric heater.

[0012] Furthermore, when cooling the passenger compartment, the low-temperature, low-pressure gaseous refrigerant in the evaporator is compressed inside the compressor to become a high-temperature, high-pressure gas, which is then condensed into a high-temperature, high-pressure liquid by the condenser. The liquid is then throttled by the shut-off valve-thermostatic expansion valve and returned to the evaporator. The low-temperature gas is then blown into the passenger compartment by a blower inside the evaporator. When cooling the battery, the low-temperature, low-pressure gaseous refrigerant of the evaporator is compressed inside the compressor to become a high-temperature, high-pressure gas, and then condensed into a high-temperature, high-pressure liquid through the condenser, and then passes through the battery cooler, enters the third port of the eight-way valve through the second port of the eight-way valve, flows through the battery to cool the battery, passes through the fourth port of the eight-way valve, and enters the battery cooler from the fifth port of the eight-way valve.

[0013] Furthermore, when the engine is cooling, the water in the engine executes a large circulation mode, the water dissipates heat through the high-temperature radiator, and is replenished by the high-temperature expansion kettle; During electric drive cooling, water enters the seventh port of the eight-way valve through the sixth port of the eight-way valve through the internal flow channel, flows through the electric drive components, and enters the low-temperature radiator through the V2 port and the V1 port of the second three-way valve.

[0014] Furthermore, when the passenger compartment and the battery are heated at the same time, this is achieved through the high-voltage electric heater, or the passenger compartment is heated by the high-voltage electric heater and the battery is heated by the engine at the same time, or the passenger compartment is heated by the high-voltage electric heater and the battery is heated by the electric drive component at the same time, or the passenger compartment is heated by the engine and the battery is heated by the electric drive component at the same time.

[0015] Furthermore, the heat source used to heat the passenger compartment and the battery is related to the business control logic.

[0016] In a second aspect, an embodiment of the present invention further provides a hybrid vehicle, comprising the hybrid vehicle thermal management system described in any one of the above-mentioned first aspects.

[0017] In an embodiment of the present invention, a hybrid electric vehicle thermal management system is provided, comprising a refrigerant circuit and a coolant circuit. The coolant circuit comprises a high-temperature circuit, a low-temperature circuit, a heater circuit, and a battery circuit. The heat sources in the coolant circuit comprise an engine, an electric drive component, and a high-voltage electric heater, so that the engine, the electric drive component, and the high-voltage electric heater heat the passenger compartment and the battery via a heater core in the coolant circuit. The high-temperature circuit, the low-temperature circuit, the heater circuit, and the battery circuit are connected in series via an eight-way valve, a four-way valve, and two three-way valves. As can be seen from the above description, the hybrid electric vehicle thermal management system of the present invention utilizes an eight-way valve, a four-way valve, and two three-way valves to connect the high-temperature circuit, the low-temperature circuit, the heater circuit, and the battery circuit in series. This enables the coordinated use of multiple heat sources (the engine, the electric drive component, and the high-voltage electric heater), effectively utilizing various heat sources to heat the passenger compartment and the battery, and achieving high energy efficiency. Furthermore, the structure has a high level of integration, effectively reducing the number of components and further reducing costs, thereby alleviating the technical problems of energy waste and low integration in conventional hybrid electric vehicle thermal management systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of a hybrid vehicle thermal management system provided by an embodiment of the present invention.

[0020] Icons: 01-compressor; 02-condenser; 03-first PT sensor; 04-coaxial tube; 05-stop valve-thermal expansion valve; 06-evaporator; 07-second PT sensor; 08-electronic expansion valve; 09-battery cooler; 10-third PT sensor; 11-engine; 12-high-temperature radiator; 13-eight-way valve; 14-four-way valve; 15-high-voltage electric heater; 16-first electronic water pump; 17-first three-way valve; 18-heater core; 19-high-temperature expansion kettle; 20-electric drive components; 21-second three-way valve; 22-low-temperature radiator; 23-first water temperature sensor; 24-second electronic water pump; 25-low-temperature expansion kettle; 26-battery; 27-third water temperature sensor; 28-third electronic water pump; 29-second water temperature sensor. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Traditional hybrid vehicle thermal management systems have low energy utilization and low integration levels.

[0023] Based on this, the hybrid vehicle thermal management system of the present invention uses an eight-way valve, a four-way valve, and two three-way valves to connect the high-temperature circuit, low-temperature circuit, warm air circuit, and battery circuit in series. This can achieve the coordinated use of multiple heat sources (engine, electric drive components, and high-voltage electric heater), effectively utilize various heat sources to heat the passenger compartment and battery, and achieve high energy utilization. In addition, the above structure has a high level of integration, which can effectively reduce the number of parts and further reduce costs.

[0024] To facilitate understanding of this embodiment, a hybrid vehicle thermal management system disclosed in an embodiment of the present invention is first introduced in detail.

[0025] Example 1: The embodiment of the present invention provides a hybrid vehicle thermal management system, such as Figure 1 As shown, including: refrigerant circuit ( Figure 1 The blue line part) and the coolant circuit ( Figure 1 Other lines except the blue line); The coolant circuit includes: a high-temperature circuit, a low-temperature circuit, a heater circuit, and a battery circuit, and the heat sources in the coolant circuit include: the engine 11, the electric drive component 20, and the high-voltage electric heater 15, so as to heat the passenger compartment and the battery 26 through the engine 11, the electric drive component 20, and the high-voltage electric heater 15 via the heater core 18 in the coolant circuit; The high-temperature circuit, the low-temperature circuit, the warm air circuit and the battery circuit are connected in series via an eight-way valve 13, a four-way valve 14 and two three-way valves.

[0026] In this embodiment of the present invention, a multi-way water valve (one eight-way valve 13, one four-way valve 14, and two three-way valves) connects the engine 11 circuit (i.e., the high-temperature circuit), the low-temperature circuit, the heater circuit, and the battery circuit in series. This utilizes the heat source of the engine 11, the waste heat from the electric drive (i.e., the electric drive component 20), and the heat source of the high-voltage electric heater 15, thereby enabling the selection of heat sources for heating the passenger compartment and the battery 26. Furthermore, the use of the multi-way water valve in this invention achieves a highly integrated hybrid vehicle thermal management system, reducing the number of components in conventional hybrid vehicle thermal management systems.

[0027] In an embodiment of the present invention, a hybrid vehicle thermal management system is provided, comprising: a refrigerant circuit and a coolant circuit; the coolant circuit comprises: a high-temperature circuit, a low-temperature circuit, a warm air circuit, and a battery circuit, and the heat sources in the coolant circuit comprise: an engine 11, an electric drive component 20, and a high-voltage electric heater 15, so as to heat the passenger compartment and the battery 26 via a warm air core 18 in the coolant circuit through the engine 11, the electric drive component 20, and the high-voltage electric heater 15; the high-temperature circuit, the low-temperature circuit, the warm air circuit, and the battery circuit are connected in series via an eight-way valve 13, a four-way valve 14, and two three-way valves. As can be seen from the above description, the hybrid vehicle thermal management system of the present invention uses an eight-way valve 13, a four-way valve 14, and two three-way valves to connect the high-temperature circuit, the low-temperature circuit, the warm air circuit, and the battery circuit in series. This enables the coordinated use of multiple heat sources (the engine 11, the electric drive component 20, and the high-voltage electric heater 15), effectively utilizing various heat sources to heat the passenger compartment and the battery 26, and achieving high energy utilization. In addition, the above structure has a high level of integration, which can effectively reduce the number of components, further reducing costs, and alleviating the technical problems of energy waste and low integration in traditional hybrid vehicle thermal management systems.

[0028] The above content briefly introduces the hybrid vehicle thermal management system of the present invention. The specific contents involved are described in detail below.

[0029] In an optional embodiment of the present invention, the refrigerant circuit includes: a first circuit consisting of a compressor 01, a condenser 02, a first PT sensor 03, a coaxial tube 04, a stop valve-thermal expansion valve 05, an evaporator 06, and a second PT sensor 07 connected by pipelines, and a first branch consisting of an electronic expansion valve 08, a battery 26 cooler 09, and a third PT sensor 10 connected by pipelines, one end of the first branch being connected to the outlet pipeline of the coaxial tube 04, and the other end being connected to the outlet pipeline of the evaporator 06.

[0030] In an optional embodiment of the present invention, the high temperature circuit and the warm air circuit are coupled ( Figure 1the red line portion in the figure), including: a second circuit formed by the engine 11 and the high-temperature radiator 12 connected by pipelines, the engine 11, the eighth port of the eight-way valve 13, the first port of the eight-way valve 13, the V2nd port of the four-way valve 14, the V3rd port of the four-way valve 14, the high-voltage electric heater 15, the first electronic water pump 16, the V2nd port of the first three-way valve 17, the V1st port of the first three-way valve 17, the heater core 18, the V4th port of the four-way valve 14, the V1st port of the four-way valve 14 forming a third circuit, a second branch formed by pipelines, and a high-temperature expansion kettle 19, one end of the second branch being connected to the V3rd port of the first three-way valve 17 by pipeline, and the other end being connected to the third port of the eight-way valve 13 by pipeline, one end of the high-temperature expansion kettle 19 being connected to the engine 11 by pipeline, and the other end being connected to the high-temperature radiator 12; Low temperature circuit ( Figure 1 The green line portion in the figure includes: a fourth circuit formed by a pipeline-connected electric drive component 20, a V2-th port of the second three-way valve 21, a V1-th port of the second three-way valve 21, a low-temperature radiator 22, the sixth port of the eight-way valve 13, the seventh port of the eight-way valve 13, a first water temperature sensor 23, and a second electronic water pump 24; a third branch formed by the pipeline; and a fourth branch formed by a low-temperature expansion kettle 25 connected by the pipeline. One end of the third branch is connected to the V3-th port of the second three-way valve 21 via a pipeline, and the other end is connected to the sixth port of the eight-way valve 13 via a pipeline. One end of the fourth branch is connected to one end of the first water temperature sensor 23, and the other end is connected to the low-temperature radiator 22. Battery circuit ( Figure 1 The purple line portion in the figure includes: a fifth circuit consisting of a battery 26, a third water temperature sensor 27, the fourth port of the eight-way valve 13, the third port of the eight-way valve 13, the third electronic water pump 28, and the second water temperature sensor 29 connected by pipelines; a sixth circuit consisting of a battery 26, a cooler 09, the second port of the eight-way valve 13, and the fifth port of the eight-way valve 13 connected by pipelines; and a fifth branch consisting of a low-temperature expansion kettle 25 connected by pipelines. One end of the fifth branch is connected to the fourth port of the eight-way valve 13, and the other end is connected to the low-temperature radiator 22.

[0031] In the above-described structure of the present invention, direct connection via the eight-way valve 13 reduces losses associated with conventional plate heat exchangers (heat loss can be reduced by 18%). The eight-way valve 13 employs diamond-shaped flow channels within it, creating internal cross-flow channels that reduce external piping connections. The four-way valve 14 is rotatable and reversible, with an electric actuator driving the valve core through 360° rotation, replacing multiple solenoid valves.

[0032] In an optional embodiment of the present invention, when the passenger compartment is heated by the engine 11, hot water from the engine 11 enters the eighth port of the eight-way valve 13, then flows through the first port of the eight-way valve 13 through the internal flow channel, enters the V2 port and the V3 port of the four-way valve 14, then flows through the V2 port and the V1 port of the first three-way valve 17, with the V3 port closed, enters the heater core 18, and then flows through the V4 port and the V1 port of the four-way valve 14 back to the engine 11; When the electric drive component 20 heats the passenger compartment, the hot water in the electric drive component 20 flows through the V2nd and V3rd ports of the second three-way valve 21, enters the sixth port of the eight-way valve 13, enters the first port of the eight-way valve 13 through the internal flow passage, flows through the V2nd and V3rd ports of the four-way valve 14, passes through the V2nd and V1st ports of the first three-way valve 17, enters the heater core 18, then flows through the V4th and V1st ports of the four-way valve 14, flows through the engine 11, returns to the eighth port of the eight-way valve 13, and then enters the seventh port of the eight-way valve 13 through the internal flow passage of the eight-way valve 13, returning to the electric drive component 20. When the passenger compartment is heated by the high-voltage electric heater 15, the hot water of the high-voltage electric heater 15 flows through the V2 port and the V1 port of the first three-way valve 17, the V3 port is closed, and then flows through the heater core 18, and the hot air is blown into the passenger compartment for heating through the blower, and then flows through the V4 port and the V3 port of the four-way valve 14 and returns to the high-voltage electric heater 15.

[0033] In an optional embodiment of the present invention, when the battery 26 is heated by the engine 11, the hot water from the engine 11 enters the third port of the eight-way valve 13 through the eighth port of the eight-way valve 13, flows through the battery 26 to heat the battery 26, then enters the first port of the eight-way valve 13 through the fourth port of the eight-way valve 13, passes through the V2 port and the V1 port of the four-way valve 14, and returns to the engine 11. When the electric drive component 20 heats the battery 26, the hot water in the electric drive component 20 flows through the V2-th port and the V3-th port of the second three-way valve 21, enters the sixth port of the eight-way valve 13, then enters the third port of the eight-way valve 13 through the internal flow channel of the eight-way valve 13, flows through the battery 26 to heat the battery 26, enters the fourth port of the eight-way valve 13, then enters the seventh port of the eight-way valve 13 through the internal flow channel of the eight-way valve 13, and returns to the electric drive component 20. When the battery 26 is heated by the high-voltage electric heater 15, the hot water of the high-voltage electric heater 15 flows through the V2 port and the V3 port of the first three-way valve 17, the V1 port is closed, flows through the battery 26 to heat the battery 26, and then flows through the fourth port of the eight-way valve 13, flows out from the first port of the eight-way valve 13 into the V2 port and the V3 port of the four-way valve 14, and returns to the high-voltage electric heater 15.

[0034] In an optional embodiment of the present invention, when cooling the passenger compartment, the low-temperature, low-pressure gaseous refrigerant in the evaporator 06 is compressed inside the compressor 01 to become a high-temperature, high-pressure gas, which is then condensed into a high-temperature, high-pressure liquid by the condenser 02. The liquid is then throttled by the stop valve / thermostatic expansion valve 05 and returns to the evaporator 06. The low-temperature gas is then blown into the passenger compartment by a blower in the evaporator 06. When cooling the battery 26, the low-temperature, low-pressure gaseous refrigerant in the evaporator 06 is compressed inside the compressor 01 to become a high-temperature, high-pressure gas, and then condensed into a high-temperature, high-pressure liquid through the condenser 02, and then passes through the battery 26 cooler 09, enters the third port of the eight-way valve 13 through the second port of the eight-way valve 13, flows through the battery 26 to cool the battery 26, passes through the fourth port of the eight-way valve 13, and enters the battery 26 cooler 09 from the fifth port of the eight-way valve 13.

[0035] In an optional embodiment of the present invention, when the engine 11 is cooling, the water in the engine 11 executes a large circulation mode, the water is cooled by the high-temperature radiator 12, and the water is replenished by the high-temperature expansion kettle 19; During electric drive cooling, water enters the seventh port of the eight-way valve 13 through the internal flow channel via the sixth port of the eight-way valve 13, flows through the electric drive component 20, and enters the low-temperature radiator 22 through the V2 port and the V1 port of the second three-way valve 21.

[0036] In an optional embodiment of the present invention, when the passenger compartment and the battery 26 are heated at the same time, this is achieved through the high-voltage electric heater 15, or the passenger compartment is heated by the high-voltage electric heater 15 and the battery 26 is heated by the engine 11 at the same time, or the passenger compartment is heated by the high-voltage electric heater 15 and the battery 26 is heated by the electric drive component 20 at the same time, or the passenger compartment is heated by the engine 11 and the battery 26 is heated by the electric drive component 20 at the same time.

[0037] In an optional embodiment of the present invention, the heat source used to heat the passenger compartment and the battery 26 is associated with the business control logic.

[0038] The following describes the implementation mode and working principle of the present invention: The available modes are mainly divided into: passenger compartment cooling, battery 26 cooling, passenger compartment heating, battery 26 heating, electric drive cooling, and engine 11 large loop (i.e., engine 11 cooling). The following table mainly describes the specific functional modes.

[0039]

[0040] The present invention decomposes the working principles of different modes in detail based on the above functional mode list: Modes 1 and 2 are uniform temperature and ventilation conditions and will not be further explained. Here, we will briefly describe the cooling principles of the engine 11 and electric drive. The cooling principle of engine 11: When the water temperature in engine 11 is too high, the internal thermostat opens, and the high-circulation mode is activated. At this time, the coolant dissipates heat through the high-temperature radiator 12 and is replenished by the high-temperature expansion tank 19. The cooling principle of the electric drive: When the vehicle is running, the electric drive components 20 generate heat. To avoid power limitation caused by excessive internal rotor temperature, the electric drive components 20 are cooled by coolant, which transfers the heat to the low-temperature radiator 22, where it is dissipated through the air. At this time, the coolant (i.e., water) flows from the sixth port (i.e., 6) of the eight-way valve 13 through the internal flow channel to the seventh port (i.e., 7) of the eight-way valve 13. It then flows through the electric drive components 20 and into the low-temperature radiator 22, forming a circulating water path. It is worth noting that at this time, the V2 and V1 ports of the second three-way valve 21 are fully open, and the V3 port is closed.

[0041] Mode 3: Passenger compartment cooling. At this time, the compressor 01 responds to the cooling and starts working. The refrigeration cycle is that the low-temperature, low-pressure gaseous refrigerant coming out of the evaporator 06 is compressed inside the compressor 01 to become a high-temperature, high-pressure gas. It then passes through the condenser 02 through the metal pipe wall and fins to dissipate heat to the outside air, so that the high-temperature, high-pressure gas is condensed into a high-temperature, high-pressure liquid. It is then throttled through the stop valve-thermal expansion valve 05 and flows into the evaporator 06 again. The low-temperature gas is blown into the passenger compartment by the blower in the evaporator 06 to reduce the cabin temperature.

[0042] Mode 4: Passenger Compartment & Battery 26 Cooling. The principles are the same as above. Note that after passing through the high-pressure pipeline, the refrigerant liquid (i.e., high-temperature, high-pressure liquid) is split, with one portion entering the battery 26 cooler circuit (09) and the other entering the evaporator (06). Passenger compartment cooling is similar to Mode 3 and will not be further described. Note that the battery 26 cooler circuit (09) absorbs heat from the coolant circuit on the battery 26 side through the refrigerant's heat absorption, thereby cooling the battery 26. It is also noteworthy that the battery 26 water temperature can be controlled by adjusting the opening of the electronic expansion valve (08) during battery 26 cooling.

[0043] Mode 5: Battery 26 is cooling. In this mode, the refrigerant (i.e., high-temperature, high-pressure liquid) enters only the battery 26 cooler 09 circuit. The shutoff valve (thermostatic expansion valve 05) in the evaporator 06 circuit responds, closing the evaporator 06 circuit and allowing heat exchange within the battery 26 cooler 09. At this point, the eight-way valve 13 operates as follows: The refrigerant enters the battery circuit from its second port (i.e., port 2), through its third port (i.e., port 3), passes through the battery 26 water cooling plate, flows through its fourth port (i.e., port 4), and exits through its fifth port (i.e., port 5) to enter the battery 26 cooler 09, forming a circulating water circuit. It is also worth noting that the water pump provides the circulating water flow.

[0044] Mode 6: Battery 26 heating (heat source engine 11), utilizing hot water from engine 11. Hot water from engine 11 enters the third port (i.e., 3) of eight-way valve 13 through the eighth port (i.e., 8), flows through the battery circuit, heats battery 26, then enters the first port (i.e., 1) of eight-way valve 13 through the fourth port (i.e., 4), passes through the V2nd port (i.e., V2) and the V1st port (i.e., V1) of four-way valve 14, and returns to engine 11, forming a circulating water circuit.

[0045] Mode 7: Passenger compartment heating (heat source engine 11). At this time, the hot water of the engine 11 is used. The hot water enters the eighth port (i.e., 8) of the eight-way valve 13 from the engine 11, and then flows through the first port (i.e., 1) of the eight-way valve 13 through the internal flow channel to enter the V2 port (i.e., V2) and the V3 port (V3) of the four-way valve 14. Considering the influence of power consumption, the high-voltage electric heater 15 does not work. The hot water then flows through the V2 port and the V1 port of the first three-way valve 17 (V1 and V2 are fully open), the V3 port is closed, and the hot water enters the heater core 18. Then, the hot water flows through the V4 port and the V1 port of the four-way valve 14 and returns to the engine 11.

[0046] Mode 8: Heating Battery 26 (heat source HVH (i.e., high-voltage electric heater 15)). In this case, considering EV ("Electric Vehicle") operating conditions or when the engine 11 coolant temperature is too low, the engine 11 is not started, and the HVH heats the coolant, thereby heating the battery 26. During this time, the HVH operates, with the coolant (i.e., hot water) flowing through ports V2 and V3 of the first three-way valve 17 (i.e., ports V2 and V3 are fully open), while port V1 is closed. The coolant then flows through the battery 26, heating it. After circulating within the battery circuit (the path containing the battery 26), it flows through the fourth port of the eight-way valve 13, exits from the first port of the eight-way valve 13, and enters ports V2 and V3 of the four-way valve 14. At this point, ports V2 and V3 of the four-way valve 14 are open, returning to the HVH to form a circulating water path.

[0047] Mode 9: Passenger Compartment Heating (Heat Source HVH). In this mode, the HVH heats the coolant, allowing for EV operation or when the engine 11's coolant temperature is too low. The coolant then flows through ports V2 and V1 of the first three-way valve 17 (ports V2 and V1 are fully open), with port V3 closed. The coolant then flows through the heater core 18, where the blower blows the heated air into the passenger compartment for heating. The coolant then forms a circulation loop through ports V4 and V3 of the four-way valve 14. At this point, ports V4 and V3 of the four-way valve 14 are open, while ports V1 and V2 are closed.

[0048] Mode 10: Passenger Compartment & Battery 26 Heating (Heat Source HVH). In this mode, the HVH heats the coolant, taking into account EV operation or when the engine 11 coolant temperature is too low. The HVH begins to operate, flowing through the first three-way valve 17. Ports V1, V2, and V3 are proportionally open. Water enters the battery circuit from port V3, flows through the fourth port of the eight-way valve 13, enters the first port of the eight-way valve 13, and then enters the four-way valve 14. Ports V2 and V3 of the four-way valve 14 are now active. The other side flows through port V1 of the three-way valve, enters the heater core 18, heats the passenger compartment, and returns to the four-way valve 14, opening ports V4 and V3.

[0049] Mode 11: Battery 26 heating (electric drive waste heat). During driving, the electric drive generates heat internally, and this waste heat is used to heat the battery circuit. Hot water in the electric drive circuit flows through the second three-way valve 21, with ports V2 and V3 fully open, and enters the sixth port of the eight-way valve 13. It then flows through the internal flow channel of the eight-way valve 13 and enters the third port of the eight-way valve 13. After undergoing a heating cycle within the battery circuit, it enters the fourth port of the eight-way valve 13, and from there, it enters the seventh port of the eight-way valve 13, returning to the electric drive circuit, forming a circulating water path.

[0050] Mode 12: Passenger Compartment Heating (Electric Drive Waste Heat). Hot water from the electric drive unit 20 flows through ports V2 and V3 of the second three-way valve 21. At this point, the coolant enters the sixth port of the eight-way valve 13, flows through the internal flow channel into the first port of the eight-way valve 13, flows through ports V2 and V3 of the four-way valve 14, passes through ports V2 and V1 of the first three-way valve 17, enters the heater core 18, flows through ports V4 and V1 of the four-way valve 14, flows through the engine 11, returns to the eighth port of the eight-way valve 13, and then flows through the internal flow channel of the eight-way valve 13 into the seventh port of the eight-way valve 13 before returning to the electric drive unit 20, forming a water circulation circuit.

[0051] Mode 13: Passenger compartment (heat source HVH), battery 26 heating (heat source engine 11). Considering the high heat demands of the passenger compartment and battery 26, the passenger compartment is heated by the heat source HVH, and the battery 26 is heated by the engine 11. Coolant from the engine 11 flows through the eighth port of the eight-way valve 13, through the internal flow channel of the eight-way valve 13, into the third port of the eight-way valve 13, enters the battery circuit, flows through the fourth port of the eight-way valve 13, flows through the internal flow channel, enters the first port of the eight-way valve 13, and enters the four-way valve 14. At this point, ports V2 and V1 of the four-way valve 14 are open, allowing the coolant to return to the engine 11. The operating logic of HVH heating the coolant in the passenger compartment is identical to that of Mode 9 and will not be further elaborated here.

[0052] Mode 14: Passenger compartment heating (heat source: HVH) and battery 26 heating (heat source: electric drive waste heat). Energy utilization is a key consideration in this mode, and demand is high. Passenger compartment heating utilizes HVH, and the operating logic is identical to mode 9, which is not further explained here. Battery 26 heating utilizes electric drive waste heat, and the operating logic is identical to mode 11, which is also not further explained. At this point, ports V2 & V3, and V4 & V1 of four-way valve 14 are open.

[0053] Mode 15: Passenger compartment heating (heat source: engine 11) and battery 26 (exhaust heat from the electric drive). Energy utilization is a key consideration in this mode, and demand is high. Passenger compartment heating utilizes engine 11 as the heat source, and the operating logic is identical to that of Mode 7, which is not further detailed here. Battery 26 heating utilizes exhaust heat from the electric drive, and the operating logic is identical to that of Mode 11, which is also not further detailed here. At this point, ports V2 / V3 and V4 / V1 of four-way valve 14 are open.

[0054] The above modes are all functional modes that can be implemented by the hybrid vehicle thermal management system of this invention. Compared with the existing technology, the obvious advantages of this invention are: 1. An eight-way valve, a four-way valve, and two three-way valves are used to connect the high-temperature circuit, the warm air circuit, and the low-temperature circuit in series, enabling the coordinated use of multiple heat sources and effectively utilizing heat sources to heat the passenger compartment and battery. 2. The invention has a high degree of integration, which can effectively reduce the number of parts and further reduce costs; 3. The invention has many functional modes and can meet different functional requirements to the greatest extent; 4. This invention can effectively reduce energy consumption and thus improve endurance.

[0055] Example 2: An embodiment of the present invention further provides a hybrid vehicle, which includes the hybrid vehicle thermal management system according to any one of the above-mentioned embodiments.

[0056] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0057] In addition, in the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0058] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid vehicle thermal management system, characterized in that: include: Refrigerant circuit and coolant circuit; The coolant circuit includes: a high-temperature circuit, a low-temperature circuit, a heater circuit, and a battery circuit, and the heat sources in the coolant circuit include: an engine, an electric drive component, and a high-voltage electric heater, so as to heat the passenger compartment and the battery through the engine, the electric drive component, and the high-voltage electric heater via a heater core in the coolant circuit; The high-temperature circuit, the low-temperature circuit, the warm air circuit and the battery circuit are connected in series via an eight-way valve, a four-way valve and two three-way valves.

2. The hybrid vehicle thermal management system according to claim 1, characterized in that: The refrigerant circuit includes: a first circuit consisting of a compressor, a condenser, a first PT sensor, a coaxial tube, a stop valve-thermal expansion valve, an evaporator, and a second PT sensor connected by pipelines; and a first branch consisting of an electronic expansion valve, a battery cooler, and a third PT sensor connected by pipelines. One end of the first branch is connected to the outlet pipeline of the coaxial tube, and the other end is connected to the outlet pipeline of the evaporator.

3. The hybrid vehicle thermal management system according to claim 2, characterized in that: The high-temperature circuit and the warm air circuit coupling design include: an engine connected by a pipeline, a second circuit consisting of a high-temperature radiator, the engine connected by a pipeline, the eighth port of the eight-way valve, the first port of the eight-way valve, the V2th port of the four-way valve, the V3th port of the four-way valve, a high-voltage electric heater, a first electronic water pump, the V2th port of the first three-way valve, the V1th port of the first three-way valve, a warm air core, the V4th port of the four-way valve, the V1th port of the four-way valve forming a third circuit, a second branch consisting of a pipeline and a high-temperature expansion kettle, one end of the second branch is connected to the V3th port of the first three-way valve by a pipeline, and the other end is connected to the third port of the eight-way valve by a pipeline, one end of the high-temperature expansion kettle is connected to the engine pipeline, and the other end is connected to the high-temperature radiator; The low-temperature circuit includes: an electric drive component connected by pipelines, a V2 port of the second three-way valve, a V1 port of the second three-way valve, a low-temperature radiator, the sixth port of the eight-way valve, the seventh port of the eight-way valve, a first water temperature sensor, a second electronic water pump forming a fourth circuit, a third branch formed by pipelines, and a fourth branch formed by a low-temperature expansion kettle connected by pipelines, one end of the third branch being connected to the V3 port of the second three-way valve via a pipeline, and the other end being connected to the sixth port of the eight-way valve via a pipeline, one end of the fourth branch being connected to one end of the first water temperature sensor, and the other end being connected to the low-temperature radiator; The battery circuit includes: a fifth circuit consisting of a battery connected by a pipeline, a third water temperature sensor, the fourth port of the eight-way valve, the third port of the eight-way valve, a third electronic water pump, and a second water temperature sensor; a sixth circuit consisting of a battery cooler connected by a pipeline, the second port of the eight-way valve, and the fifth port of the eight-way valve; and a fifth branch consisting of a low-temperature expansion kettle connected by a pipeline. One end of the fifth branch is connected to the fourth port of the eight-way valve, and the other end is connected to the low-temperature radiator.

4. The hybrid vehicle thermal management system according to claim 3, characterized in that: When the passenger compartment is heated by the engine, hot water from the engine enters the eighth port of the eight-way valve, then flows through the first port of the eight-way valve through the internal flow channel, enters the V2nd port and the V3rd port of the four-way valve, then flows through the V2nd port and the V1st port of the first three-way valve, the V3rd port is closed, enters the heater core, and then flows through the V4th port and the V1st port of the four-way valve back to the engine; When the passenger compartment is heated by the electric drive component, the hot water of the electric drive component flows through the V2nd port and the V3nd port of the second three-way valve, enters the sixth port of the eight-way valve, enters the first port of the eight-way valve through the internal flow passage, flows through the V2nd port and the V3nd port of the four-way valve, passes through the V2nd port and the V1st port of the first three-way valve, enters the heater core, then flows through the V4th port and the V1st port of the four-way valve, flows through the engine, returns to the eighth port of the eight-way valve, and then enters the seventh port of the eight-way valve through the internal flow passage of the eight-way valve and returns to the electric drive component; When the passenger compartment is heated by the high-voltage electric heater, the hot water of the high-voltage electric heater flows through the V2 port and the V1 port of the first three-way valve, the V3 port is closed, and then flows through the heater core, and the hot air is blown into the passenger compartment for heating by the blower, and then flows through the V4 port and the V3 port of the four-way valve back to the high-voltage electric heater.

5. The hybrid vehicle thermal management system according to claim 3, characterized in that: When the battery is heated by the engine, hot water from the engine enters the third port of the eight-way valve through the eighth port of the eight-way valve, flows through the battery to heat the battery, then enters the first port of the eight-way valve through the fourth port of the eight-way valve, passes through the V2th port and the V1th port of the four-way valve, and then returns to the engine; When the electric drive component heats the battery, the hot water of the electric drive component flows through the V2 port and the V3 port of the second three-way valve, enters the sixth port of the eight-way valve, then enters the third port of the eight-way valve through the flow passage inside the eight-way valve, flows through the battery to heat the battery, enters the fourth port of the eight-way valve, then enters the seventh port of the eight-way valve through the flow passage inside the eight-way valve, and returns to the electric drive component. When the battery is heated by the high-voltage electric heater, the hot water of the high-voltage electric heater flows through the V2 port and the V3 port of the first three-way valve, the V1 port is closed, flows through the battery to heat the battery, and then flows through the fourth port of the eight-way valve, flows out from the first port of the eight-way valve into the V2 port and the V3 port of the four-way valve, and returns to the high-voltage electric heater.

6. The hybrid vehicle thermal management system according to claim 3, characterized in that: When cooling the passenger compartment, the low-temperature, low-pressure gaseous refrigerant in the evaporator is compressed inside the compressor to become a high-temperature, high-pressure gas, which is then condensed into a high-temperature, high-pressure liquid by the condenser. The liquid is then throttled by the shut-off valve-thermostatic expansion valve and returned to the evaporator. The low-temperature gas is then blown into the passenger compartment by a blower inside the evaporator. When cooling the battery, the low-temperature, low-pressure gaseous refrigerant of the evaporator is compressed inside the compressor to become a high-temperature, high-pressure gas, and then condensed into a high-temperature, high-pressure liquid through the condenser, and then passes through the battery cooler, enters the third port of the eight-way valve through the second port of the eight-way valve, flows through the battery to cool the battery, passes through the fourth port of the eight-way valve, and enters the battery cooler from the fifth port of the eight-way valve.

7. The hybrid vehicle thermal management system according to claim 3, characterized in that: When the engine is cooling, the water in the engine executes a large circulation mode, the water is cooled by the high-temperature radiator, and the water is replenished by the high-temperature expansion kettle; During electric drive cooling, water enters the seventh port of the eight-way valve through the sixth port of the eight-way valve through the internal flow channel, flows through the electric drive components, and enters the low-temperature radiator through the V2 port and the V1 port of the second three-way valve.

8. The hybrid vehicle thermal management system according to claim 3, characterized in that: When the passenger compartment and the battery are heated at the same time, this is achieved through the high-voltage electric heater, or the passenger compartment is heated by the high-voltage electric heater and the battery is heated by the engine at the same time, or the passenger compartment is heated by the high-voltage electric heater and the battery is heated by the electric drive component at the same time, or the passenger compartment is heated by the engine and the battery is heated by the electric drive component at the same time.

9. The hybrid vehicle thermal management system according to claim 8, characterized in that: The heat source used to heat the passenger compartment and the battery is related to business control logic.

10. A hybrid vehicle, characterized in that: A hybrid vehicle thermal management system comprising the thermal management system according to any one of claims 1 to 9.

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