Vehicle thermal management system and vehicle

Abstract

The invention discloses a vehicle heat management system and a vehicle. The vehicle heat management system comprises an engine cooling loop, a low-temperature loop, a refrigerant loop, a warm air loop and a multi-way valve. Wherein the low-temperature loop comprises a battery loop and a motor loop, the multi-way valve is connected with the engine cooling loop, the warm air loop, the battery loop, the motor loop and the refrigerant loop, and different valve ports of the multi-way valve are switched and communicated to communicate part or all of the engine cooling loop, the warm air loop, the battery loop, the motor loop and the refrigerant loop; a single multi-way valve is arranged to be connected with an engine cooling loop, a warm air loop, a battery loop, a motor loop and a refrigerant loop, different valve ports communicated with the multi-way valve are switched according to the heat dissipation or heating requirements of all parts and spaces of a vehicle, and multiple heat management modes are achieved. The energy of the whole vehicle is efficiently utilized on the premise that the thermal management requirements of all parts of the vehicle are met, the number of the valve bodies is reduced, and therefore the space requirement and complexity of the whole thermal management system are reduced.

Description

Technical Field

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

[0002] With the continuous development of new energy vehicle technology, new energy vehicles have become a common and indispensable means of transportation in people's daily lives. Hybrid / extended-range vehicles include both engine and battery dual power sources, which generate a lot of heat. In order to ensure the safety and reliability of various components of the vehicle, it is necessary to perform thermal management on various components of the vehicle to maintain them within a reasonable operating temperature range. For example, the discharge efficiency of the battery is significantly low in a low temperature environment, so it is necessary to heat or keep it warm to improve its discharge efficiency. The battery also has certain safety hazards in a high temperature environment, so it needs to be cooled.

[0003] For hybrid / extended-range vehicles, their engines, motors, and batteries all generate heat when working and need to be dissipated, and the batteries need to be heated in low-temperature environments. The car cabin needs to be heated in low-temperature environments and needs to be dissipated in high-temperature environments. How to efficiently utilize the heat generated inside the car to meet the vehicle's thermal management needs and minimize energy consumption is an important technical issue in the field of thermal management technology. Summary of the invention

[0004] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a vehicle thermal management system and a vehicle.

[0005] According to one aspect of the present application, a vehicle thermal management system is provided, comprising: an engine cooling circuit, the engine cooling circuit being used to dissipate heat from the engine; a low-temperature circuit, the low-temperature circuit comprising a battery circuit and a motor circuit; a refrigerant circuit, the refrigerant circuit being used to provide heat or absorb heat using a refrigerant; a warm air circuit, the warm air circuit being used to provide heat to the passenger compartment; and a multi-way valve; wherein the multi-way valve connects the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, and switches different valve ports of the multi-way valve to connect part or all of the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit.

[0006] In one embodiment, the battery circuit includes a battery water pump, a PTC and a battery cooling channel connected in sequence; wherein, the PTC and the battery cooling channel are arranged in parallel and are connected to each other through a coolant three-way valve, and the PTC and / or the battery cooling channel are connected by adjusting the opening of the coolant three-way valve, the inlet of the battery water pump is connected to the valve port 1 of the multi-way valve, and the outlets of the PTC and the battery cooling channel are connected to the valve port 2 of the multi-way valve.

[0007] In one embodiment, the refrigerant circuit includes a compressor, an air-cooled condenser, a water-cooled condenser and a chiller connected in sequence, wherein the air-cooled condenser and the water-cooled condenser are arranged in parallel, and the inlet and outlet of the chiller are respectively connected to the valve port 3 and the valve port 4 of the multi-way valve.

[0008] In one embodiment, a refrigerant three-way valve is provided between the air-cooled condenser and the water-cooled condenser, and the air-cooled condenser or the water-cooled condenser is connected by adjusting the opening of the refrigerant three-way valve.

[0009] In one embodiment, the refrigerant circuit further includes an evaporator, the inlet of the evaporator is connected to the outlet of the air-cooled condenser, and the outlet of the evaporator is connected to the inlet of the compressor.

[0010] In one embodiment, the refrigerant circuit further includes a first coaxial tube; wherein the first coaxial tube is disposed between the compressor and the evaporator.

[0011] In one embodiment, the motor circuit includes a motor water pump, a motor cooling channel and a low-temperature radiator which are connected in sequence; wherein the inlet of the motor cooling channel is connected to the valve port 5 of the multi-way valve, the inlet of the low-temperature radiator is connected to the valve port 6 of the multi-way valve, and the outlet of the motor water pump is connected to the valve port 7 of the multi-way valve.

[0012] In one embodiment, the warm air circuit includes a warm air water pump and a water heating core connected to each other; wherein the inlet of the warm air water pump is connected to the valve port 8 of the multi-way valve, and the outlet of the water heating core is connected to the valve port 10 of the multi-way valve.

[0013] In one embodiment, the engine cooling circuit includes an engine water pump, an engine cooling channel, a thermostat and a high-temperature radiator connected in sequence; wherein the outlet of the engine cooling channel is connected to the inlet of the water heating core, and the outlet of the thermostat is connected to the valve port 9 of the multi-way valve.

[0014] According to another aspect of the present application, a vehicle is provided, comprising: an engine, a motor, a battery, and the vehicle thermal management system described in any one of the above.

[0015] Compared with the prior art, the vehicle thermal management system and vehicle provided by the present application have the following beneficial effects: 1. By setting a multi-way valve, the multi-way valve connects the engine cooling circuit, the heating circuit, the battery circuit, the motor circuit and the refrigerant circuit, and switching the different valve ports of the multi-way valve to connect part or all of the engine cooling circuit, the heating circuit, the battery circuit, the motor circuit and the refrigerant circuit; that is, by setting a single multi-way valve to connect the engine cooling circuit, the heating circuit, the battery circuit, the motor circuit and the refrigerant circuit, the different valve ports of the multi-way valve are switched according to the heat dissipation or heating requirements of various components and spaces of the vehicle, thereby achieving partial or full connection of the engine cooling circuit, the heating circuit, the battery circuit, the motor circuit and the refrigerant circuit, and then realizing a variety of thermal management modes, efficiently utilizing the energy of the entire vehicle while meeting the thermal management requirements of various components of the vehicle, and reducing the number of valve bodies, thereby reducing the space requirement and complexity of the entire thermal management system.

[0016] 2. Connect the air-cooled condenser and the water-cooled condenser in parallel through a refrigerant three-way valve to improve the heat exchange efficiency of the refrigerant circuit, and perform heat exchange through the water-cooled condenser to realize the heat pump mode, so as to recover the heat in the water-cooled condenser to heat the passenger compartment or the battery, thereby improving the utilization rate of heat and reducing the heating energy consumption.

[0017] 3. Connect the battery cooling channel and PTC in parallel through the coolant three-way valve to achieve multi-mode heating of the battery, thereby improving the thermal management effect of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0019] Figure 1 It is a schematic diagram of the structure of a vehicle thermal management system provided by an exemplary embodiment of the present application.

[0020] Figure 2 It is a schematic diagram of a working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0021] Figure 3 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0022] Figure 4 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0023] Figure 5 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0024] Figure 6 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0025] Figure 7 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0026] Figure 8 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0027] Fig. 9 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0028] Fig.10 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application.

[0029] Fig.11 It is a schematic diagram of another working mode structure of a vehicle thermal management system device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0030] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0031] Figure 1 FIG. 1 is a schematic diagram of the structure of a vehicle thermal management system provided by an exemplary embodiment of the present application. Figure 1 As shown, the vehicle thermal management system includes: an engine cooling circuit, a low-temperature circuit, a refrigerant circuit, a warm air circuit and a multi-way valve; wherein the engine cooling circuit is used to dissipate heat from the engine, the low-temperature circuit includes a battery circuit and a motor circuit, the refrigerant circuit is used to provide heat or absorb heat using a refrigerant, the warm air circuit is used to provide heat to the passenger compartment, and the multi-way valve connects the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, and switches to connect different valve ports of the multi-way valve to connect part or all of the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit.

[0032] The vehicle thermal management system of the present application can be applied to hybrid vehicles or extended-range vehicles, wherein both hybrid vehicles and extended-range vehicles include engines, motors, and batteries. The vehicle thermal management system provided in the present application includes an engine cooling circuit, a low-temperature circuit, a refrigerant circuit, and a warm air circuit. The engine cooling circuit is used to dissipate heat from the engine, the low-temperature circuit is used to dissipate heat from the motor, dissipate heat from the battery, or heat the battery. The refrigerant circuit is used to provide heat or absorb heat using a refrigerant, and the warm air circuit is used to provide heat to the passenger compartment. Among them, the low-temperature circuit includes a battery circuit and a motor circuit. The battery circuit is used to dissipate heat or heat the battery, and the motor circuit is used to dissipate heat from the motor. In addition, the present application connects the engine cooling circuit, heating circuit, battery circuit, motor circuit and refrigerant circuit through a multi-way valve to achieve connectivity of multiple circuits, and connects part or all of the engine cooling circuit, heating circuit, battery circuit, motor circuit and refrigerant circuit by connecting different valve ports of the multi-way valve, thereby utilizing a single multi-way valve to achieve heat exchange between multiple circuits, which can not only effectively reduce the number of valve bodies used to save costs, but also reduce the complexity of the thermal management system. At the same time, multi-circuit comprehensive management can be utilized to more effectively perform thermal management on each circuit, thereby improving the thermal management efficiency and effect of the vehicle thermal management system, and then reducing thermal management energy consumption.

[0033] A vehicle thermal management system provided by the present application includes an engine cooling circuit, a low-temperature circuit, a refrigerant circuit, a warm air circuit and a multi-way valve; wherein the engine cooling circuit is used to dissipate heat from the engine, the low-temperature circuit includes a battery circuit and a motor circuit, the refrigerant circuit is used to provide heat or absorb heat using a refrigerant, the warm air circuit is used to provide heat to the passenger compartment, and the multi-way valve connects the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, and switches different valve ports of the multi-way valve to connect part or all of the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit; that is, by setting a single multi-way valve to connect the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, different valve ports of the multi-way valve are switched according to the heat dissipation or heating requirements of various components and spaces of the vehicle, thereby achieving partial or full connection of the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, and then realizing multiple thermal management modes, efficiently utilizing the energy of the entire vehicle while meeting the thermal management requirements of various components of the vehicle, and reducing the number of valve bodies, thereby reducing the space requirement and complexity of the entire thermal management system.

[0034] In one embodiment, if Figure 1As shown, the above-mentioned battery circuit may include a battery water pump, a PTC and a battery cooling channel connected in sequence; wherein, the PTC and the battery cooling channel are arranged in parallel and are connected through a coolant three-way valve, and the PTC and / or the battery cooling channel are connected by adjusting the opening of the coolant three-way valve, the inlet of the battery water pump is connected to the valve port 1 of the multi-way valve, and the outlet of the PTC and the battery cooling channel is connected to the valve port 2 of the multi-way valve.

[0035] The battery circuit in the present application includes a battery water pump, a PTC and a battery cooling channel. The battery water pump, the PTC and the battery cooling channel are connected in sequence through a cooling pipeline to form a circulation loop, wherein the battery cooling channel is a heat dissipation water channel structure arranged at the battery (battery pack) or the battery cell, and the low-temperature coolant (such as water with a lower temperature) in the battery circuit is used to flow through the battery cooling channel to take away the heat of the battery cell to achieve battery cooling, and at the same time, the high-temperature coolant in the battery circuit is used to flow through the battery cooling channel to exchange heat with the battery cell to achieve heating of the battery. The present application uses a coolant three-way valve to connect the PTC (positive temperature coefficient thermistor, Positive Temperature Coefficient, referred to as PTC) and the battery cooling channel. By adjusting the coolant three-way valve, the PTC or the battery cooling channel can be connected separately, or the PTC and the battery cooling channel can be connected at the same time. When the PTC and the battery cooling channel are connected at the same time, the flow rate of the coolant flowing through the PTC and the battery cooling channel can be adjusted, so that the battery temperature can be flexibly adjusted to meet the thermal management requirements of the battery. At the same time, the present application connects the inlet of the battery water pump to the valve port 1 of the multi-way valve, and the outlet of the PTC and the battery cooling channel to the valve port 2 of the multi-way valve. By connecting the valve port 1 and the valve port 2, the closed-loop connection of the battery circuit can be realized.

[0036] In one embodiment, if Figure 1 As shown, the refrigerant circuit includes a compressor, an air-cooled condenser, a water-cooled condenser and a chiller which are connected in sequence, wherein the air-cooled condenser and the water-cooled condenser are arranged in parallel, and the inlet and outlet of the chiller are respectively connected to the valve port 3 and the valve port 4 of the multi-way valve.

[0037] The refrigerant circuit of the present application includes a compressor, an air-cooled condenser, a water-cooled condenser and a chiller. The compressor, the air-cooled condenser, the water-cooled condenser and the chiller are connected in sequence through cooling pipes to form a circulation loop. The present application sets an air-cooled condenser and a water-cooled condenser in parallel, and uses the air-cooled condenser and the water-cooled condenser to avoid the problems of poor cooling effect and high high pressure of a single water-cooled condenser in high temperature scenes. In addition, the present application connects the inlet and outlet of the chiller to the valve port 3 and the valve port 4 of the multi-way valve respectively, and uses the multi-way valve to connect the refrigerant circuit with other circuits to improve the utilization rate of the refrigerant circuit.

[0038] In one embodiment, if Figure 1 As shown, a refrigerant three-way valve is arranged between the air-cooled condenser and the water-cooled condenser, and the air-cooled condenser or the water-cooled condenser is connected by adjusting the opening of the refrigerant three-way valve.

[0039] The present application can connect an air-cooled condenser or a water-cooled condenser separately by adjusting the refrigerant three-way valve, and when connecting the air-cooled condenser or the water-cooled condenser, the refrigerant flow rate flowing through the air-cooled condenser or the water-cooled condenser can be adjusted, so that the cooling or heating effect of the refrigerant circuit can be flexibly adjusted to meet the thermal management requirements; for example, in the air-conditioning cooling mode, the air-cooled condenser can be connected to utilize the air-cooled condenser for heat dissipation, and in the air-conditioning heating mode, the water-cooled condenser can be connected to utilize the water-cooled condenser for heat dissipation. Optionally, the present application can also replace the refrigerant three-way valve with two stop valves to achieve the same function.

[0040] In one embodiment, if Figure 1 As shown, the refrigerant circuit also includes an evaporator, the inlet of the evaporator is connected to the outlet of the air-cooled condenser, and the outlet of the evaporator is connected to the inlet of the compressor.

[0041] The present application achieves a refrigeration effect by arranging an evaporator between the inlet of the compressor and the outlet of the air-cooled condenser in the refrigerant circuit. The low-temperature condensed liquid flowing out of the air-cooled condenser exchanges heat with the outside air at the evaporator and vaporizes and absorbs heat.

[0042] In one embodiment, if Figure 1 As shown, the refrigerant circuit also includes a first coaxial tube; wherein the first coaxial tube is arranged between the compressor and the evaporator.

[0043] The present application arranges a first coaxial tube between the compressor and the evaporator respectively, and utilizes the coaxial tube to increase the supercooling degree of the liquid refrigerant to improve the refrigeration effect.

[0044] Optional, such as Figure 1 As shown, the refrigerant circuit of the present application may also include a liquid storage dryer, which is arranged between the air-cooled condenser and the chiller. The liquid storage dryer is used to store excess liquid refrigerant so as to compensate and adjust the profit and loss of liquid refrigerant when the working conditions change. Figure 1 As shown, the refrigerant circuit of the present application may also include a first electronic expansion valve and a second electronic expansion valve, the first electronic expansion valve (EXV1) is arranged between the second coaxial tube and the evaporator, and the second electronic expansion valve (EXV2) is arranged between the second coaxial valve and the chiller, and the first electronic expansion valve and the second electronic expansion valve are used to adjust the refrigerant flow in the refrigerant circuit to achieve temperature adjustment.

[0045] In one embodiment, if Figure 1As shown, the refrigerant circuit also includes a second coaxial tube, wherein the second coaxial tube is arranged behind the liquid storage tank and between the first electronic expansion valve, and the coaxial tube is used to increase the supercooling degree of the liquid refrigerant to improve the refrigeration effect.

[0046] In one embodiment, if Figure 1 As shown, the motor circuit includes a motor water pump, a motor cooling channel and a low-temperature radiator which are connected in sequence; wherein the inlet of the motor cooling channel is connected to the valve port 5 of the multi-way valve, the inlet of the low-temperature radiator is connected to the valve port 6 of the multi-way valve, and the outlet of the motor water pump is connected to the valve port 7 of the multi-way valve.

[0047] The motor circuit of the present application includes a motor water pump, a motor cooling channel and a low-temperature radiator, and the motor water pump, the motor cooling channel and the low-temperature radiator are sequentially connected through a cooling pipeline to form a circulation loop. The present application connects the inlet of the motor cooling channel to the valve port 5 of the multi-way valve, the inlet of the low-temperature radiator to the valve port 6 of the multi-way valve, and the outlet of the motor water pump to the valve port 7 of the multi-way valve, and uses a multi-way valve to connect the motor circuit with other circuits to improve the thermal management effect of the motor circuit.

[0048] In one embodiment, if Figure 1 As shown, the warm air circuit includes a warm air water pump and a water heating core connected to each other; wherein the inlet of the warm air water pump is connected to the valve port 8 of the multi-way valve, and the outlet of the water heating core is connected to the valve port 10 of the multi-way valve.

[0049] The warm air circuit of the present application includes a warm air water pump and a water heating core, and the warm air water pump and the water heating core are connected through a cooling pipeline to form a circulation circuit. The present application connects the inlet of the warm air water pump to the valve port 8 of the multi-way valve, and the outlet of the water heating core to the valve port 10 of the multi-way valve, and uses the multi-way valve to connect the warm air circuit with other circuits to improve the utilization rate of the warm air circuit.

[0050] In one embodiment, if Figure 1 As shown, the engine cooling circuit includes an engine water pump, an engine cooling channel, a thermostat and a high-temperature radiator connected in sequence; wherein the outlet of the engine cooling channel is connected to the inlet of the water heating core, and the outlet of the thermostat is connected to the valve port 9 of the multi-way valve.

[0051] The engine cooling circuit of the present application includes an engine water pump, an engine cooling channel, a thermostat and a high-temperature radiator. The engine water pump, the engine cooling channel, the thermostat and the high-temperature radiator are connected in sequence through cooling pipes to form a circulation circuit, wherein the engine cooling channel is a heat dissipation water channel structure arranged at the engine. The present application connects the outlet of the engine cooling channel to the inlet of the water heating core, and the outlet of the thermostat to the valve port 9 of the multi-way valve, and uses the heat of the engine cooling circuit to heat the water heating core to increase the temperature of the warm air circuit. At the same time, the engine cooling circuit is connected to other circuits by using the multi-way valve to improve the utilization rate of the engine heat.

[0052] Based on the above vehicle thermal management system, the present application can implement a variety of thermal management modes, some of which are described below as examples: (1) Pure electric mode 1: like Figure 2 As shown, at this time, the engine is not working, and the engine cooling circuit is not involved in the work. For the refrigerant circuit, the refrigerant three-way valve opens the compressor side and the water-cooled condenser side, and closes the air-cooled condenser side. The high-temperature and high-pressure refrigerant at the compressor outlet is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange through the water-cooled condenser. The liquid storage dryer stores excess liquid refrigerant. The liquid refrigerant increases the supercooling degree through the second coaxial tube, and then becomes a low-pressure and low-temperature two-phase refrigerant after throttling through the second electronic expansion valve (EXV2). It exchanges heat with the coolant of the low-temperature circuit in the chiller. The refrigerant at the chiller outlet is then converted into a low-pressure and low-temperature gaseous superheated refrigerant through the first coaxial tube and returns to the compressor, forming an intercooler circulation loop. In addition, the present application connects valve ports 1 and 10, valve ports 2 and 8, valve ports 3 and 7, and valve ports 4 and 5 of the multi-way valve. For the low-temperature circuit, the outlet coolant of the motor cooling channel enters the chiller through the motor water pump and valve ports 7 and 3 of the multi-way valve to release heat into the refrigerant circuit, and the chiller outlet coolant returns to the motor cooling channel through valve ports 4 and 5 of the multi-way valve to absorb heat, forming a motor circulation circuit; for the warm air circuit, the outlet coolant of the warm air water pump exchanges heat with the air in the passenger compartment through the water heating core, and then absorbs the heat of the refrigerant circuit through the water-cooled condenser, and then passes through valve ports 10 and 1 of the multi-way valve, the battery water pump and the coolant three-way valve, one way enters the battery cooling channel for heat exchange, and the other way enters the PTC for heat exchange, and the coolant that meets at the outlet of the battery cooling channel and the outlet of the PTC returns to the warm air water pump through valve ports 2 and 8 of the multi-way valve, forming a heating + battery heating circulation circuit.

[0053] In this mode, the coolant three-way valve can also be fully opened to the PTC side, and the PTC only heats the passenger compartment without performing thermal management on the battery; the coolant three-way valve can also be fully opened to the battery cooling flow channel side to achieve the situation where the PTC does not work and the passenger compartment is heated only by the heat in the battery circuit; the water heating core can also be made to not work (the passenger compartment is not heated), and the PTC only heats the battery; or the valve ports 10 and 1, valve ports 2 and 8, valve ports 7 and 3, and valve ports 4 and 6 of the multi-way valve can be connected, and the warm air circuit absorbs ambient heat and heat from the motor circuit at the same time.

[0054] (2) Pure electric mode 2: like Figure 3As shown, at this time, the engine is not working, and the engine cooling circuit is not involved in the work. For the refrigerant circuit, the refrigerant three-way valve opens the compressor side and the water-cooled condenser side, and closes the air-cooled condenser side. The high-temperature and high-pressure refrigerant at the compressor outlet is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange through the water-cooled condenser. The liquid storage dryer stores excess liquid refrigerant. The liquid refrigerant increases the supercooling degree through the second coaxial tube. One path is throttled by the first electronic expansion valve (EXV1) and becomes a low-pressure and low-temperature two-phase refrigerant. It absorbs air heat in the evaporator to reduce it to below the dew point temperature, thereby reducing the air moisture content. The other path is throttled by the second electronic expansion valve (EXV2) and becomes a low-pressure and low-temperature two-phase refrigerant. It exchanges heat with the coolant of the low-temperature circuit in the chiller. The chiller outlet refrigerant merges with the evaporator outlet refrigerant and then passes through the first coaxial tube to become a low-pressure and low-temperature gaseous superheated refrigerant and returns to the compressor, forming an intercooler circulation loop. In addition, the present application connects valve ports 10 and 8, valve ports 2 and 1, valve ports 3 and 7, and valve ports 4 and 5 of the multi-way valve. For the motor circuit, the outlet coolant of the motor cooling channel enters the chiller through the motor water pump and valve ports 7 and 3 of the multi-way valve to release heat into the refrigerant circuit, and the chiller outlet coolant returns to the motor cooling channel through valve ports 4 and 5 of the multi-way valve to absorb heat, thereby forming a motor circulation circuit; for the battery circuit, the outlet coolant of the battery cooling channel returns to the battery cooling channel through valve ports 2 and 1 of the multi-way valve, the battery water pump and the coolant three-way valve (at this time, the coolant three-way valve is fully opened to the battery cooling channel side), thereby forming a battery circulation circuit; for the warm air circuit, the outlet coolant of the warm air water pump exchanges heat with the air in the passenger compartment through the water heating core, then absorbs the heat of the refrigerant circuit through the water-cooled condenser, and then returns to the warm air water pump through valve ports 10 and 8 of the multi-way valve, thereby forming a heating circulation circuit.

[0055] In this mode, the battery side and the PTC side of the coolant three-way valve can be connected to achieve passenger compartment heating and dehumidification + PTC heating of the battery + motor heat recovery; the battery water pump and PTC can be controlled not to work to achieve water heating core heating of the passenger compartment + motor heat recovery; the warm air circuit can be controlled not to work to achieve PTC heating of the battery; or EXV1 and the evaporator can be controlled not to work to stop dehumidification; or valve ports 10 and 8, valve ports 2 and 1, valve ports 3 and 7, valve ports 4 and 6 of the multi-way valve can be connected, and the warm air circuit absorbs ambient heat and heat from the motor circuit at the same time.

[0056] (3) Pure Electric Mode 3: like Figure 4As shown, at this time, the engine is not working, and the engine cooling circuit is not involved in the work. For the refrigerant circuit, the refrigerant three-way valve opens the compressor side and the water-cooled condenser side, and closes the air-cooled condenser side. The high-temperature and high-pressure refrigerant at the compressor outlet is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange through the water-cooled condenser. The liquid storage dryer stores excess liquid refrigerant. The liquid refrigerant increases the supercooling degree through the second coaxial tube. One path is throttled by the first electronic expansion valve (EXV1) and becomes a low-pressure and low-temperature two-phase refrigerant. It absorbs air heat in the evaporator to reduce it to below the dew point temperature, thereby reducing the air moisture content. The other path is throttled by the second electronic expansion valve (EXV2) and becomes a low-pressure and low-temperature two-phase refrigerant. It exchanges heat with the coolant of the low-temperature circuit in the chiller. The chiller outlet refrigerant merges with the evaporator outlet refrigerant and then passes through the first coaxial tube to become a low-pressure and low-temperature gaseous superheated refrigerant and returns to the compressor, forming an intercooler circulation loop. In addition, the present application connects valve ports 10 and 8, valve ports 7 and 1, valve ports 2 and 3, and valve ports 4 and 5 of the multi-way valve. For the low-temperature circuit, the outlet coolant of the motor cooling channel enters the battery cooling channel for heat exchange through the motor water pump and valve ports 7 and 1 of the multi-way valve, the battery water pump and the coolant three-way valve (at this time, the coolant three-way valve is fully opened to the battery cooling channel side), and then enters the chiller for heat exchange with the refrigerant through valve ports 2 and 3 of the multi-way valve. The chiller outlet coolant returns to the motor cooling channel for heat absorption through valve ports 4 and 5 of the multi-way valve, forming a motor + battery circulation loop; for the warm air circuit, the outlet coolant of the warm air water pump exchanges heat with the air in the passenger compartment through the water heating core, absorbs the heat of the refrigerant circuit through the water-cooled condenser, and then returns to the warm air water pump through valve ports 10 and 8 of the multi-way valve, forming a heating circulation loop.

[0057] In this mode, the valve ports 4 and 6 of the multi-way valve can also be connected to release the excess heat in the motor circuit and the battery circuit into the air through the low-temperature radiator.

[0058] (4) Pure Electric Mode 4: like Figure 5As shown, at this time, the engine is not working, and the engine cooling circuit is not involved in the work. For the refrigerant circuit, the refrigerant three-way valve opens the compressor side and the water-cooled condenser side, and closes the air-cooled condenser side. The high-temperature and high-pressure refrigerant at the compressor outlet is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange through the water-cooled condenser. The liquid storage dryer stores excess liquid refrigerant. The liquid refrigerant increases the supercooling degree through the second coaxial tube, and then becomes a low-pressure and low-temperature two-phase refrigerant after throttling through the second electronic expansion valve (EXV2). It exchanges heat with the coolant of the battery circuit in the chiller. The refrigerant at the chiller outlet is then converted into a low-pressure and low-temperature gaseous superheated refrigerant through the first coaxial tube and returns to the compressor, forming an intercooler circulation loop. In addition, the present application connects valve ports 10 and 8, valve ports 7 and 5, valve ports 4 and 1, and valve ports 2 and 3 of the multi-way valve. For the motor circuit, the coolant at the outlet of the motor cooling channel returns to the motor cooling channel through the motor water pump and valve ports 7 and 5 of the multi-way valve to form a motor circulation loop; for the warm air circuit, the coolant at the outlet of the warm air water pump exchanges heat with the air in the passenger compartment through the water heating core, absorbs the heat of the refrigerant circuit through the water-cooled condenser, and then returns to the warm air water pump through valve ports 10 and 8 of the multi-way valve to form a heating circulation loop; for the battery circuit, the coolant at the outlet of the chiller passes through valve ports 4 and 1 of the multi-way valve, the battery water pump, and the coolant three-way valve, one way enters the battery cooling channel to exchange heat with the battery, and the other way enters the PTC to exchange heat with the PTC. After the battery cooling channel and the PTC outlet coolant are combined, they return to the chiller through valve ports 2 and 3 of the multi-way valve to form a PTC heat supplement + battery heating circulation loop.

[0059] In this mode, the coolant three-way valve can also be fully opened to the PTC side to achieve heat supplementation by PTC only, or the coolant three-way valve can be fully opened to the battery side to achieve battery heat recovery.

[0060] (5) Hybrid or extended range mode 1: like Figure 6As shown, at this time, the engine is involved in the work, and the engine cooling circuit is not involved in the work. The present application connects the valve port 10 and valve port 1 of the multi-way valve, the valve port 2 and valve port 9, the valve port 7 and valve port 3, and the valve port 4 and valve port 5. For the motor circuit, the coolant at the outlet of the motor cooling flow channel enters the chiller through the motor water pump and the valve ports 7 and valve port 3 of the multi-way valve to release the heat into the refrigerant circuit, and the coolant at the outlet of the chiller returns to the motor cooling flow channel through the valve ports 4 and valve ports 5 of the multi-way valve to absorb heat, forming a motor circulation loop. ; For the engine and heater circuit, the coolant at the engine outlet exchanges heat with the air in the passenger compartment through the water heating core, then absorbs the heat of the refrigerant circuit through the water-cooled condenser, and then passes through the valve ports 10 and 1 of the multi-way valve, the battery water pump and the coolant three-way valve, one way enters the battery cooling channel to exchange heat with the battery, and the other way enters the PTC (the PTC does not work at this time). After the battery cooling channel and the PTC outlet coolant are combined, they return to the engine through the valve ports 2 and 9 of the multi-way valve and the engine water pump to form an engine + heater circuit.

[0061] In this mode, the coolant three-way valve can also be controlled to fully open to PTC (PTC does not work at this time) to achieve engine + warm air heating of the passenger compartment + motor heat recovery.

[0062] (6) Hybrid or extended range mode 2: like Figure 7 As shown, at this time, the engine is involved in the work, and the engine cooling circuit is not involved in the work. The present application connects the valve ports 10 and 1, valve ports 2 and 9, valve ports 7 and 5 of the multi-way valve. For the motor circuit, the coolant at the outlet of the motor cooling flow channel returns to the motor cooling flow channel through the motor water pump and valve ports 7 and 5 of the multi-way valve to form a motor circulation loop; for the engine and battery circuits, the coolant at the outlet of the engine exchanges heat with the air in the passenger compartment through the water heating core, and then passes through the water-cooled condenser (not working), valve ports 10 and 1 of the multi-way valve, the battery water pump and the coolant three-way valve, one way enters the battery cooling flow channel for heat exchange with the battery, and the other way enters the PTC (PTC is not working at this time). After the battery cooling flow channel and the PTC outlet coolant are combined, they return to the engine through valve ports 2 and 9 of the multi-way valve and the engine water pump to form an engine + battery circulation loop.

[0063] In this mode, the coolant three-way valve can also be controlled to fully open to the PTC side and PTC works at the same time to achieve engine + PTC heating of the passenger compartment.

[0064] (7) Hybrid or extended range mode 3: like Figure 8As shown, at this time, the engine is involved in the work, and the engine cooling circuit is not involved in the work. The present application connects the valve ports 10 and 9, the valve ports 7 and 1, and the valve ports 2 and 5 of the multi-way valve. For the motor circuit and the battery circuit, the coolant at the outlet of the motor cooling flow channel enters the battery cooling flow channel through the motor water pump and the valve ports 7 and 1 of the multi-way valve, the battery water pump and the coolant three-way valve (fully opened to the battery cooling flow channel side) to exchange heat with the battery. The coolant at the outlet of the battery cooling flow channel returns to the motor cooling flow channel through the valve ports 2 and 5 of the multi-way valve to form a motor + battery circulation loop; for the engine circuit, the coolant at the engine outlet exchanges heat with the air in the passenger compartment through the water heating core, and then returns to the engine through the water-cooled condenser (not working), the valve ports 10 and 9 of the multi-way valve and the engine water pump to form an engine circulation loop.

[0065] (8) Hybrid or extended range mode 4: like Fig. 9 As shown, at this time, the engine is involved in the work, and the engine cooling circuit is not involved in the work. The present application connects the valve ports 10 and 9, valve ports 2 and 1, and valve ports 7 and 5 of the multi-way valve. For the motor circuit, the coolant at the outlet of the motor cooling flow channel returns to the motor cooling flow channel through the motor water pump and valve ports 7 and 5 of the multi-way valve to form a motor circulation circuit; for the engine circuit, the coolant at the outlet of the engine exchanges heat with the air in the passenger compartment through the water heating core, and then returns to the engine through the water-cooled condenser (not working), valve ports 10 and 9 of the multi-way valve and the engine water pump to form an engine circulation circuit; for the battery circuit, the coolant at the outlet of the battery cooling flow channel returns to the battery cooling flow channel through valve ports 2 and 1 of the multi-way valve, the battery water pump and the coolant three-way valve (fully opened to the battery cooling flow channel side) to form a battery circulation circuit.

[0066] (9) Hybrid or extended range mode 5: like Fig.10As shown, at this time, the engine participates in the work, and the engine cooling circuit participates in the work. For the refrigerant circuit, the refrigerant three-way valve opens the compressor side, the water-cooled condenser side and the air-cooled condenser side at the same time. The high-temperature and high-pressure refrigerant at the compressor outlet is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange in the water-cooled condenser. The liquid storage dryer stores excess liquid refrigerant. The liquid refrigerant increases the supercooling degree through the second coaxial tube. One path is throttled by the first electronic expansion valve (EXV1) and becomes a low-pressure and low-temperature two-phase refrigerant. It exchanges heat with the passenger compartment air in the evaporator to reduce the passenger compartment temperature. The other path is throttled by the second electronic expansion valve (EXV2) and becomes a low-pressure and low-temperature two-phase refrigerant. It exchanges heat with the coolant of the battery circuit in the chiller to reduce the battery temperature. The chiller outlet refrigerant merges with the evaporator outlet refrigerant and then passes through the first coaxial tube to become a low-pressure and low-temperature gaseous superheated refrigerant and returns to the compressor to form an intercooler circulation loop. In addition, the present application connects valve ports 7 and 6, valve ports 4 and 1, and valve ports 2 and 3 of the multi-way valve. For the motor circuit, the coolant at the outlet of the motor cooling flow channel enters the low-temperature radiator through the motor water pump and valve ports 7 and 6 of the multi-way valve, exchanges heat with the air in the low-temperature radiator, and returns to the motor cooling flow channel to form a motor circulation loop; for the battery circuit, the coolant at the outlet of the chiller enters the battery cooling flow channel through valve ports 4 and 1 of the multi-way valve and the battery water pump to exchange heat with the battery, and the coolant at the outlet of the battery cooling flow channel returns to the chiller through valve ports 2 and 3 of the multi-way valve to exchange heat with the refrigerant to form a battery circulation loop; for the engine circuit, the coolant at the outlet of the engine exchanges heat with the air through the high-temperature radiator, and then returns to the engine through the thermostat large circulation and the engine water pump to form an engine circulation loop.

[0067] In this mode, the passenger compartment can be cooled by the refrigerant circuit, the battery circuit can be cooled separately, the motor circuit can be cooled separately, the engine circuit can be cooled separately, etc.

[0068] (10) Pure Electric Mode 5: like Fig.11As shown, at this time, the engine does not participate in the work, the engine cooling circuit and the heating circuit do not participate in the work, for the refrigerant circuit, the refrigerant three-way valve opens the compressor side, the water-cooled condenser side and the air-cooled condenser side at the same time, and the high-temperature and high-pressure refrigerant at the compressor outlet is converted into a high-pressure and low-temperature two-phase refrigerant after heat exchange in the water-cooled condenser. The liquid storage dryer stores excess liquid refrigerant, and the liquid refrigerant increases the supercooling degree through the second coaxial tube. After throttling by the first electronic expansion valve (EXV1), it becomes a low-pressure and low-temperature two-phase refrigerant, which exchanges heat with the passenger compartment air in the evaporator to reduce the passenger compartment temperature. The refrigerant at the evaporator outlet is converted into a low-pressure and low-temperature gaseous superheated refrigerant through the first coaxial tube and returns to the compressor, forming an intercooler circulation loop. In addition, the present application connects valve port 7 and valve port 1, valve port 2 and valve port 6 of the multi-way valve. For the motor circuit and the battery circuit, the coolant at the outlet of the motor cooling channel flows into the battery cooling channel through the motor water pump, valve port 7 and valve port 1 of the multi-way valve and the battery water pump to exchange heat with the battery. The coolant at the outlet of the battery cooling channel enters the low-temperature radiator through valve port 2 and valve port 6 of the multi-way valve to exchange heat with the air to reduce the temperature and then returns to the motor cooling channel to form a motor + battery circulation loop.

[0069] In this mode, the refrigerant circuit can also be controlled to not work, so as to achieve passive battery cooling + motor cooling.

[0070] The present application also provides a vehicle, comprising: an engine, a motor, a battery, and a vehicle thermal management system of any of the above.

[0071] A vehicle provided by the present application includes an engine cooling circuit, a low-temperature circuit, a refrigerant circuit, a warm air circuit and a multi-way valve; wherein the engine cooling circuit is used to dissipate heat for the engine, the low-temperature circuit includes a battery circuit and a motor circuit, the refrigerant circuit is used to provide heat or absorb heat using a refrigerant, the warm air circuit is used to provide heat to the passenger compartment, and the multi-way valve connects the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, and switches different valve ports of the multi-way valve to connect part or all of the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit; that is, by setting a single multi-way valve to connect the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, different valve ports of the multi-way valve are switched according to the heat dissipation or heating requirements of various components and spaces of the vehicle, thereby achieving partial or full connection of the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, and then realizing multiple thermal management modes, efficiently utilizing the energy of the entire vehicle while meeting the thermal management requirements of various components of the vehicle, and reducing the number of valve bodies, thereby reducing the space requirement and complexity of the entire thermal management system.

[0072] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0073] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0074] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

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

[0076] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A vehicle thermal management system, characterized in that: include: An engine cooling circuit, wherein the engine cooling circuit is used to dissipate heat from the engine; A low temperature circuit, the low temperature circuit comprising a battery circuit and a motor circuit; A refrigerant circuit, wherein the refrigerant circuit is used to provide heat or absorb heat using a refrigerant; A warm air circuit, the warm air circuit being used to provide heat to the passenger compartment; A multi-way valve; wherein the multi-way valve connects the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit, and switches different valve ports of the multi-way valve to connect part or all of the engine cooling circuit, the warm air circuit, the battery circuit, the motor circuit and the refrigerant circuit.

2. The vehicle thermal management system according to claim 1, characterized in that: The battery circuit includes a battery water pump, a PTC and a battery cooling channel which are connected in sequence; wherein the PTC and the battery cooling channel are arranged in parallel and are connected to each other through a coolant three-way valve, the PTC and / or the battery cooling channel are connected by adjusting the opening of the coolant three-way valve, the inlet of the battery water pump is connected to the valve port 1 of the multi-way valve, and the outlets of the PTC and the battery cooling channel are connected to the valve port 2 of the multi-way valve.

3. The vehicle thermal management system according to claim 1, characterized in that: The refrigerant circuit includes a compressor, an air-cooled condenser, a water-cooled condenser and a chiller which are connected in sequence, wherein the air-cooled condenser and the water-cooled condenser are arranged in parallel, and the inlet and outlet of the chiller are respectively connected to the valve port 3 and the valve port 4 of the multi-way valve.

4. The vehicle thermal management system according to claim 3, characterized in that: A refrigerant three-way valve is arranged between the air-cooled condenser and the water-cooled condenser, and the air-cooled condenser or the water-cooled condenser is connected by adjusting the opening of the refrigerant three-way valve.

5. The vehicle thermal management system according to claim 4, characterized in that: The refrigerant circuit further includes an evaporator, the inlet of the evaporator is connected to the outlet of the air-cooled condenser, and the outlet of the evaporator is connected to the inlet of the compressor.

6. The vehicle thermal management system according to claim 5, characterized in that: The refrigerant circuit further includes a first coaxial tube; wherein the first coaxial tube is arranged between the compressor and the evaporator.

7. The vehicle thermal management system according to claim 1, characterized in that: The motor circuit includes a motor water pump, a motor cooling channel and a low-temperature radiator which are connected in sequence; wherein the inlet of the motor cooling channel is connected to the valve port 5 of the multi-way valve, the inlet of the low-temperature radiator is connected to the valve port 6 of the multi-way valve, and the outlet of the motor water pump is connected to the valve port 7 of the multi-way valve.

8. The vehicle thermal management system according to claim 1, characterized in that: The warm air circuit includes a warm air water pump and a water heating core connected to each other; wherein the inlet of the warm air water pump is connected to the valve port 8 of the multi-way valve, and the outlet of the water heating core is connected to the valve port 10 of the multi-way valve.

9. The vehicle thermal management system according to claim 8, characterized in that: The engine cooling circuit includes an engine water pump, an engine cooling channel, a thermostat and a high-temperature radiator connected in sequence; wherein the outlet of the engine cooling channel is connected to the inlet of the water heating core, and the outlet of the thermostat is connected to the valve port 9 of the multi-way valve.

10. A vehicle, characterized in that: include: An engine, a motor, a battery, and a vehicle thermal management system as claimed in any one of claims 1 to 9.

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