Thermal management system and vehicle

Abstract

The invention discloses a thermal management system and a vehicle. The thermal management system comprises a first control valve, a second control valve and an air conditioning system. The first control valve communicates with a high-pressure heat exchange loop, a radiator loop, a battery heat exchange loop, a heat exchanger loop and a heating loop. The first control valve selectively communicates with one or more of the high-pressure heat exchange loop, the radiator loop, the battery heat exchange loop, the heat exchanger loop and the heating loop. The two ends of the second control valve communicate with the two ends of the battery heat exchange loop, the other end of the second control valve communicates with the heating loop, and the other end of the second control valve communicates with the heat exchanger loop. The air conditioning system exchanges heat with the heating loop and / or the heat exchanger loop. The first control valve and the second control valve are used for controlling the flow direction of cooling liquid, the situation that the cooling liquid flows through parts without temperature adjustment is reduced, the situation that a heat exchanger loop is idle under part of working conditions is reduced, the utilization rate of the heat exchanger loop is increased, the heat management control strategy is simplified, and the whole vehicle weight is reduced.

Description

Technical Field

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

[0002] To put it simply, the pure electric thermal management architecture is a control system for the internal heat of an electric vehicle. It involves multiple subsystems such as battery thermal management, drive motor cooling, air conditioning system, and passenger compartment temperature regulation.

[0003] In the related technology, in order to ensure more functions, the circulation modes of the integrated architecture on the coolant side of the pure electric thermal management system are becoming more and more, and various control valve bodies are increasing accordingly. The coolant circulation system has a large number of parts, the water circuit is highly complex, and the weight of the entire vehicle is heavy. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a thermal management system, which uses a first control valve and a second control valve to control the flow direction of the coolant, reduces the coolant flowing through the components that do not need thermal management control, improves the utilization rate of the heat exchanger circuit, simplifies the thermal management strategy, and reduces the weight of the vehicle.

[0005] According to the first aspect of the present invention, the thermal management system includes: a first control valve, the first control valve is connected to a high-pressure heat exchange circuit, a radiator circuit, a battery heat exchange circuit, a heat exchanger circuit and a heating circuit, and the first control valve selectively connects one or more of the high-pressure heat exchange circuit, the radiator circuit, the battery heat exchange circuit, the heat exchanger circuit and the heating circuit; a second control valve, both ends of the second control valve are connected to both ends of the battery heat exchange circuit, another end of the second control valve is connected to the heating circuit, and another end of the second control valve is connected to the heat exchanger circuit; an air-conditioning system, the air-conditioning system exchanges heat with the heating circuit and / or the heat exchanger circuit.

[0006] According to the thermal management system of the embodiment of the present invention, the first control valve and the second control valve are used to control the flow direction of the coolant, thereby reducing the situation where the coolant flows through components that do not require thermal management control. It can also reduce the idleness of the heat exchanger circuit in some operating conditions, improve the utilization rate of the heat exchanger circuit, simplify the thermal management control strategy, and reduce the weight of the entire vehicle.

[0007] According to some embodiments of the present invention, the radiator circuit includes: a radiator, one end of the radiator is connected to the heat exchanger circuit, the heating circuit and the first control valve, and the other end of the radiator is connected to the first control valve.

[0008] According to some embodiments of the present invention, the radiator circuit includes: a first multi-way pipe, one end of the first multi-way pipe is connected to the other end of the radiator, and the other two ends of the first multi-way pipe are respectively connected to two ends of the first control valve.

[0009] According to some embodiments of the present invention, the thermal management system further includes: a first branch, one end of which is connected to the first control valve, and the other end of which is connected to one end of the radiator; and the thermal management system further includes: a second branch, which is connected between the heating circuit and the first control valve.

[0010] According to some embodiments of the present invention, the heating circuit includes: a condenser, an electric heater and a heater core, the electric heater and the condenser are connected in series, one end of the condenser is connected to the first control valve and the heater core, the other end of the condenser is connected to the electric heater, and the condenser exchanges heat with the air conditioning system.

[0011] According to some embodiments of the present invention, one end of the heat exchanger circuit is connected to the first control valve and the battery heat exchange circuit, and the other end of the heat exchanger circuit is connected to the radiator circuit, the first control valve and the second control valve.

[0012] According to some embodiments of the present invention, a first one-way valve is provided between one end of the heat exchanger circuit and the battery heat exchange circuit; and a second one-way valve is provided between the other end of the heat exchanger circuit and the radiator circuit and the first control valve.

[0013] According to some embodiments of the present invention, one end of the battery heat exchange loop is connected to one end of the first control valve, and the other end of the battery heat exchange loop is connected to the other end of the second control valve and the first control valve.

[0014] According to some embodiments of the present invention, the second control valve is a proportional regulating valve.

[0015] A vehicle according to an embodiment of the second aspect of the present invention includes the thermal management system.

[0016] The beneficial effects of the embodiments of the present invention are as follows: the first control valve and the second control valve are used to control the flow direction of the coolant, thereby reducing the situation where the coolant flows through components that do not require thermal management control. The idle state of the heat exchanger circuit in some operating conditions can also be reduced, thereby improving the utilization rate of the heat exchanger circuit, simplifying the thermal management control strategy, and reducing the weight of the entire vehicle.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic diagram of a first embodiment of a thermal management system according to an embodiment of the present invention; Figure 2 is a schematic diagram of working mode 1 of a thermal management system embodiment 1 according to an embodiment of the present invention; Figure 3 is a schematic diagram of working mode 2 of embodiment 1 of a thermal management system according to an embodiment of the present invention; Figure 4 is a schematic diagram of working mode 3 of embodiment 1 of a thermal management system according to an embodiment of the present invention; Figure 5 is a schematic diagram of working mode 4 of embodiment 1 of a thermal management system according to an embodiment of the present invention; Figure 6 is a schematic diagram of working mode 5 of embodiment 1 of a thermal management system according to an embodiment of the present invention; Figure 7 is a schematic diagram of working mode 6 of embodiment 1 of a thermal management system according to an embodiment of the present invention; Figure 8 is a schematic diagram of working mode 7 of embodiment 1 of a thermal management system according to an embodiment of the present invention; Fig. 9 is a schematic diagram of working mode eight of embodiment one of a thermal management system according to an embodiment of the present invention; Fig.10 is a schematic diagram of working mode nine of embodiment one of a thermal management system according to an embodiment of the present invention; Fig.11 Schematic diagram of a second embodiment of a thermal management system according to an embodiment of the present invention.

[0019] Reference numerals: 100. Thermal management system; 10. Air conditioning system; 20. High-pressure heat exchange circuit; 21. Motor; 22. Motor controller; 30. Battery heat exchange circuit; 31. Battery pack; 32. First water pump; 40. radiator circuit; 41. radiator; 42. first multi-way pipe; 43. second water pump; 50. heat exchanger circuit; 51. heat exchanger; 60. Heating circuit; 61. Condenser; 62. Electric heater; 63. Warm air core; 64. Third water pump; 71. First control valve; 72. Second control valve; 73. First branch; 74. Second branch; 75. First non-return valve; 76. Second non-return valve; 77. Third non-return valve; 78. Fourth non-return valve. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0021] Reference below Figure 1-Figure 11 A thermal management system 100 according to an embodiment of the present invention is described, and the present invention also provides a vehicle.

[0022] Reference Figure 1 As shown, the thermal management system 100 according to the embodiment of the present invention includes a first control valve 71 , a second control valve 72 and an air conditioning system 10 .

[0023] The first control valve 71 is connected to the high-pressure heat exchange circuit 20, the radiator circuit 40, the battery heat exchange circuit 30, the heat exchanger circuit 50 and the heating circuit 60. The first control valve 71 selectively connects one or more of the high-pressure heat exchange circuit 20, the radiator circuit 40, the battery heat exchange circuit 30, the heat exchanger circuit 50 and the heating circuit 60.

[0024] In this way, the heat of the high-pressure heat exchange circuit 20, the battery heat exchange circuit 30, the radiator circuit 40, the heat exchanger circuit 50 and the heating circuit 60 can flow among each other through the first control valve 71. Under the control of the vehicle controller, the heat can flow between different circuits or different devices according to the requirements of the vehicle's thermal management mode. Different working modes can be flexibly selected in different vehicle usage scenarios to avoid frequent use of the same heat source and improve the system thermal management efficiency.

[0025] The thermal management system 100 uses the first control valve 71 to control multiple circuits. Each circuit does not interfere with each other, and can select the corresponding circuit for heat exchange according to the vehicle condition by opening and closing the valve port of the first control valve 71. It does not require too many components to participate in each working mode, and can avoid the situation where the flow in a certain working mode passes through the components that do not need thermal management control, reduce heat loss, reduce flow resistance in various modes, and improve energy utilization. It also saves space inside the vehicle, providing more possibilities for the subsequent installation of new functions and technologies.

[0026] Specifically, the first control valve 71 may be a nine-way valve, with refrigerant flowing in the air conditioning system 10, and coolant flowing in the high-pressure heat exchange loop 20, the battery heat exchange loop 30, the radiator loop 40, the heat exchange loop 50, the heating loop 60, and the circulation loop. Further, the first control valve 71 includes a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port, a sixth valve port, a seventh valve port, an eighth valve port, and a ninth valve port, which are respectively Figure 1 , '1', '2', '3', '4', '5', '6', '7', '8', and '9' in the .

[0027] The two ends of the second control valve 72 are connected to the two ends of the battery heat exchange loop 30, another end of the second control valve 72 is connected to the heating loop 60, and another end of the second control valve 72 is connected to the heat exchanger loop 50. Specifically, the second control valve 72 includes the tenth valve port, the eleventh valve port, the twelfth valve port and the thirteenth valve port. The tenth valve port is connected to the heating loop 60, the eleventh valve port is connected to the heat exchanger loop 50, and the twelfth valve port and the thirteenth valve port are connected to both ends of the battery heat exchange loop 30. Among them, the tenth valve port is "a" in Figure 1, the eleventh valve port is Figure 1 The "b" in the figure indicates that the twelfth valve port is Figure 1 The "c" in the figure indicates that the thirteenth valve port is Figure 1 The "d" in .

[0028] By controlling the opening and closing of the first control valve 71 and the second control valve 72, the flow direction of the coolant can be controlled, reducing the number of components that do not require temperature regulation under different operating modes. By connecting the second control valve 72 to the heat exchanger circuit 50, the heat exchanger circuit 50 can be connected to multiple other circuits, thereby reducing the idle state of the heat exchanger circuit 50 in some operating conditions and improving the utilization rate of the heat exchanger circuit 50.

[0029] The air conditioning system 10 exchanges heat with the heating circuit 60 and / or the heat exchanger circuit 50. Specifically, the air conditioning system 10 can exchange heat with the heat exchanger circuit 50 and the heating circuit 60. A refrigerant flows in the air conditioning system 10. The refrigerant can absorb heat from the heat exchanger circuit 50 or release heat to the heating circuit 60 to achieve heat transfer. Figure 1 As shown, the heat exchanger circuit 50 includes a heat exchanger 51, Figure 1 The dotted line beside the heat exchanger 51 indicates that the heat exchanger 51 exchanges heat with the air conditioning system 10. In this way, the utilization rate of the heat exchanger circuit 50 can be further improved.

[0030] Therefore, the first control valve 71 and the second control valve 72 are used to control the flow direction of the coolant, thereby reducing the situation where the coolant flows through parts that do not need temperature regulation. It can also reduce the idle situation of the heat exchanger circuit 50 in some operating conditions, improve the utilization rate of the heat exchanger circuit 50, simplify the thermal management control strategy, and reduce the weight of the entire vehicle.

[0031] Reference Figure 1As shown, the radiator circuit 40 includes a radiator 41, one end of the radiator 41 is connected to the heat exchange circuit 50, the heating circuit 60 and the first control valve 71, and the other end of the radiator 41 is connected to the first control valve 71. Specifically, one end of the radiator 41 is connected to the output end of the heat exchange circuit 50, the output end of the heating circuit 60 and the valve port "8" of the first control valve 71, and the other end of the radiator 41 is connected to the valve ports "3" and "4" of the first control valve 71. The high-temperature coolant flowing out of other circuits flows through the radiator 41 to dissipate heat, and the cooled coolant flows out of the radiator circuit 40.

[0032] And, the radiator circuit 40 includes a first multi-way pipe 42, one end of the first multi-way pipe 42 is connected to the other end of the radiator 41, and the other two ends of the first multi-way pipe 42 are respectively connected to two ends of the first control valve 71. Specifically, the first multi-way pipe 42 can be a three-way pipe, one end of the first multi-way pipe 42 is connected to the output end of the radiator 41, and the other two ends of the first multi-way pipe 42 are respectively connected to the "3" valve port and the "4" valve port of the first control valve 71. By setting the first multi-way pipe 42, various circulation modes of the coolant can be realized, and more functions can be realized with a simple structure.

[0033] In addition, the radiator circuit 40 further includes a second water pump 43 , which is used to drive the coolant in the radiator circuit 40 to flow.

[0034] And, the high-pressure heat exchange loop 20 includes a motor 21 and a motor controller 22, and the motor 21 and the motor controller 22 are connected in series. The motor 21 and the motor controller 22 will generate heat during operation, and the temperature of the coolant increases after heat exchange with the motor 21 and the motor controller 22, and the heat can be transferred to achieve the function of cooling or heating other components. Among them, the output end of the high-pressure heat exchange loop 20 is connected to the "7" valve port of the first control valve 71, and the input end of the high-pressure heat exchange loop 20 is connected to the "5" valve port of the first control valve 71.

[0035] Reference Figure 1 As shown, the thermal management system 100 further includes a first branch 73, one end of which is connected to the first control valve 71, and the other end is connected to one end of the radiator 41, and the thermal management system 100 further includes a second branch 74, and the second branch 74 is connected between the heating circuit 60 and the first control valve 71. Specifically, one end of the first branch 73 is connected to the valve port "8" of the first control valve 71, and the other end is connected to the input end of the radiator 41, and the second branch 74 is connected between the heating circuit 60 and the valve port "2" of the first control valve 71. Both the first branch 73 and the second branch 74 can increase the circulation mode of the coolant, and realize more functions with a simple structure.

[0036] Reference Figure 1As shown, the heating circuit 60 includes a condenser 61, an electric heater 62 and a warm air core 63. The electric heater 62 and the condenser 61 are connected in series. One end of the condenser 61 is connected to the first control valve 71 and the warm air core 63, and the other end of the condenser 61 is connected to the electric heater 62. The condenser 61 exchanges heat with the air conditioning system 10. Specifically, one end of the condenser 61 is connected to the valve port "2" of the first control valve 71 and the output end of the warm air core 63, and the other end of the condenser 61 is connected to the electric heater 62.

[0037] The coolant can flow through the condenser 61 for heat exchange and then release heat at the heater core 63 to achieve the function of heating the passenger compartment. Depending on the vehicle condition, when the air-conditioning system 10 is not turned on or the heat of the condenser 61 is insufficient, the electric heater 62 is turned on to heat the passenger compartment. When heating is not required or the heat of the condenser 61 meets the heating requirements of the passenger compartment, the electric heater 62 is turned off.

[0038] In addition, the heating circuit 60 further includes a third water pump 64 , which is used to drive the coolant in the heating circuit 60 to flow.

[0039] Reference Figure 1 As shown, one end of the heat exchanger circuit 50 is connected to the first control valve 71 and the battery heat exchange circuit 30, and the other end of the heat exchanger circuit 50 is connected to the radiator circuit 40, the first control valve 71 and the second control valve 72. Specifically, one end of the heat exchanger circuit 50 is connected to the "9" valve port of the first control valve 71 and the battery heat exchange circuit 30, and the other end of the heat exchanger circuit 50 is connected to the radiator circuit 40, the "3" valve port, the "4" valve port or the "6" valve port of the first control valve 71 and the "b" valve port of the second control valve 72. In this way, the heat exchanger circuit 50 is connected to other circuits, and the air conditioning system 10 is connected to the heat exchanger 51, so that the heat exchanger 51 exchanges heat with the air conditioning system 10 and can transfer heat to other circuits.

[0040] Furthermore, a first one-way valve 75 is provided between one end of the heat exchanger circuit 50 and the battery heat exchange circuit 30. By providing the first one-way valve 75, it is possible to control whether the battery heat exchange circuit 30 is connected to the heat exchanger circuit 50. A second one-way valve 76 is provided between the other end of the heat exchanger circuit 50 and the radiator circuit 40 and the first control valve 71. By providing the second one-way valve 76, it is possible to control whether the heat exchanger circuit 50 is connected to the radiator circuit 40 or the first control valve 71.

[0041] In addition, the thermal management system 100 further includes a third one-way valve 77 and a fourth one-way valve 78. The third one-way valve 77 is disposed between the electric heater 62 and the heater core 63, and can control whether the coolant heat-exchanged at the condenser 61 enters the heater core 63 to achieve passenger compartment heating. The fourth one-way valve 78 is disposed between the heating circuit 60 and the radiator circuit 40, and can control whether the coolant in the heating circuit 60 passes through the radiator circuit 40 and dissipates heat.

[0042] Reference Figure 1 As shown, one end of the battery heat exchange loop 30 is connected to one end of the first control valve 71, and the other end of the battery heat exchange loop 30 is connected to the other end of the second control valve 72 and the first control valve 71. The battery heat exchange loop 30 includes a first water pump 32 and a battery pack 31, the first water pump 32 and the battery pack 31 are connected in series, one end of the battery heat exchange loop 30 is connected to one end of the first control valve 71, and the output end of the battery heat exchange loop 30 is connected to the "c" valve port of the second control valve 72 and the "1" valve port of the first control valve 71.

[0043] And, the second control valve 72 is a proportional regulating valve. Specifically, when the valve ports "a", "b" and "d" of the second control valve 72 are connected, the valve ports "a" and "b" can adjust the opening ratio of the valve ports, thereby controlling the flow rate of the coolant; when the valve ports "b", "c" and "d" of the second control valve 72 are connected, the valve ports "b" and "c" can adjust the opening ratio of the valve ports, thereby controlling the flow rate of the coolant.

[0044] In addition, refer to Fig.11 As shown, in some embodiments, the first control valve 71 can be set as an eight-way valve, and the corresponding thermal management function and mode remain unchanged.

[0045] Refer to the following Figure 2-Figure 10 The working mode of the thermal management system 100 according to the embodiment of the present invention is described.

[0046] Reference Figure 2 As shown, the working mode 1 of the thermal management system 100 of the embodiment of the present invention is: The valve ports "2" and "3" of the first control valve 71 are connected, the valve ports "5" and "6" are connected, the valve ports "7" and "8" are connected, the valve ports "b" and "d" of the second control valve 72 are connected, the first check valve 75 and the fourth check valve 78 are opened, and the remaining valve ports are closed, thereby realizing the functions of cooling the air-conditioning refrigerant, cooling the high-voltage components and cooling the battery pack 31.

[0047] Coolant flow direction: second water pump 43 → radiator 41 → first control valve 71 → condenser 61 → fourth check valve 78 → radiator 41 → second water pump 43; Second water pump 43 → radiator 41 → first control valve 71 → condenser 61 → fourth check valve 78 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → radiator 41 → second water pump 43; First water pump 32 →battery pack 31 →heat exchanger 51 →second control valve 72 →first water pump 32 .

[0048] The coolant dissipates heat in the radiator 41 and becomes low-temperature coolant, and passes through the condenser 61 to absorb heat released by the refrigerant in the air-conditioning system 10, so that the temperature of the refrigerant decreases.

[0049] The coolant in the high-pressure heat exchange loop 20 carries the heat of the high-pressure components and merges with the high-temperature coolant in the heating loop 60. A portion of the coolant returns to the radiator 41 to dissipate heat and continues to flow to the condenser 61. A portion of the coolant flows to the high-pressure heat exchange loop 20 to continue cooling the high-pressure components, thereby achieving high-pressure component cooling. The electric heater 62 is not turned on.

[0050] The coolant exchanges heat through the battery pack 31, the temperature rises, and then exchanges heat with the air conditioning system 10 through the heat exchanger 51, becomes low-temperature coolant, and continues to circulate to cool the battery pack 31. When there is no cooling demand for the battery pack 31, the valve ports "b" and "d" of the second control valve 72 can be directly closed.

[0051] Reference Figure 3 As shown, the second working mode of the thermal management system 100 of the embodiment of the present invention is: The valve ports "2" and "3" of the first control valve 71 are connected, the valve ports "4" and "5" are connected, the valve ports "7" and "8" are connected, the valve ports "b" and "d" of the second control valve 72 are connected, the first check valve 75 and the fourth check valve 78 are opened, and the remaining valve ports are closed, thereby realizing the functions of cooling the air-conditioning refrigerant, cooling the high-voltage components and cooling the battery pack 31.

[0052] Coolant flow direction: second water pump 43 → radiator 41 → first control valve 71 → condenser 61 → fourth check valve 78 → radiator 41 → second water pump 43; Second water pump 43 → radiator 41 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → radiator 41 → second water pump 43; First water pump 32 →battery pack 31 →heat exchanger 51 →second control valve 72 →first water pump 32 .

[0053] When the ambient temperature is too high or the coolant at the high-voltage component is over-temperature, the radiator 41 cools the condenser 61 and the high-voltage component at the same time.

[0054] The coolant dissipates heat in the radiator 41 and becomes low-temperature coolant, and passes through the condenser 61 to absorb heat released by the refrigerant in the air-conditioning system 10, so that the temperature of the refrigerant decreases.

[0055] The coolant in the high-pressure heat exchange loop 20 carries the heat of the high-pressure components and merges with the high-temperature coolant in the heating loop 60, and dissipates heat at the radiator 41. A portion of the cooled low-temperature coolant flows to the high-pressure heat exchange loop 20 to continue cooling the high-pressure components, and a portion flows to the condenser 61 to reduce the refrigerant temperature. The electric heater 62 is not turned on.

[0056] The coolant exchanges heat through the battery pack 31, the temperature rises, and then exchanges heat with the air conditioning system 10 through the heat exchanger 51, becomes low-temperature coolant, and continues to circulate to cool the battery pack 31. When there is no cooling demand for the battery pack 31, the valve ports "b" and "d" of the second control valve 72 can be directly closed.

[0057] Reference Figure 4 As shown, the working mode 3 of the thermal management system 100 of the embodiment of the present invention is: The valve ports "5" and "6" of the first control valve 71 are connected, the valve ports "7" and "9" are connected, the valve ports "2" and "1" are connected, the valve ports "a", "c" and "d" of the second control valve 72 are connected, the second check valve 76 and the third check valve 77 are opened, and the remaining valve ports are closed, thereby realizing the heat pump heating and battery pack 31 heating functions under low temperature conditions.

[0058] Coolant flow direction: second water pump 43 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → heat exchanger 51 → second check valve 76 → second water pump 43; Condenser 61 → third water pump 64 → electric heater 62 → third one-way valve 77 → warm air core 63 → condenser 61; Condenser 61 →third water pump 64 →electric heater 62 →second control valve 72 →first water pump 32 →battery pack 31 →first control valve 71 →condenser 61 .

[0059] The coolant in the high-pressure heat exchange loop 20 carries the heat of the high-pressure components to exchange heat with the heat exchanger 51, and transfers the heat to the air-conditioning system 10. The cooled low-temperature coolant flows to the high-pressure heat exchange loop 20 to continue cooling the high-pressure components.

[0060] The refrigerant of the air conditioning system 10 releases heat at the condenser 61, the water temperature on the coolant side increases, and flows into the heater core 63 to release heat, thereby heating the passenger compartment.

[0061] The electric heater 62 can be turned on or off according to the vehicle condition, and the same applies to other working modes below.

[0062] If the battery pack 31 has a simultaneous heating demand, the opening ratio between the "a" and "c" valve ports of the second control valve 72 is adjusted, and the first water pump 32 pumps the hot water in the heating circuit 60 to the battery heat exchange circuit 30 to simultaneously meet the battery heating demand. The opening ratio between the "a" and "c" valve ports can control the cold and hot water flow ratio in the battery heat exchange circuit 30 to achieve different water temperature target requirements. When the battery pack 31 does not need to be heated, the "c" valve port and the "d" valve port of the second control valve 72 can be controlled to be connected, and the coolant circulates in the battery heat exchange circuit 30. The high-temperature coolant in the heating circuit 60 cannot enter, and the supply of high-temperature coolant is stopped.

[0063] Reference Figure 5 As shown, the fourth working mode of the thermal management system 100 of the embodiment of the present invention is: The valve ports "4" and "5" of the first control valve 71 are connected, the valve ports "7" and "9" are connected, the valve ports "2" and "1" are connected, the valve ports "a", "c" and "d" of the second control valve 72 are connected, the second check valve 76 and the third check valve 77 are opened, and the remaining valve ports are closed, so that when the demand for air conditioning and heating is high, the heat pump heating and battery pack 31 heating functions are realized.

[0064] Coolant flow direction: second water pump 43 → radiator 41 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → heat exchanger 51 → second check valve 76 → second water pump 43; Condenser 61 → third water pump 64 → electric heater 62 → third one-way valve 77 → warm air core 63 → condenser 61; Condenser 61 →third water pump 64 →electric heater 62 →second control valve 72 →first water pump 32 →battery pack 31 →first control valve 71 →condenser 61 .

[0065] When the heating demand of the air-conditioning system 10 is very high, the heat absorption capacity of the heat exchanger 51 increases, causing the coolant temperature of the high-pressure heat exchange loop 20 to be lower than the ambient temperature. The coolant in the high-pressure heat exchange loop 20 carries the heat of the high-pressure components and exchanges heat with the heat exchanger 51, transferring the heat to the air-conditioning system 10, but it is not enough to meet the needs of the air-conditioning system 10. The coolant also needs to pass through the radiator 41 to absorb the ambient temperature for use by the air-conditioning system 10.

[0066] The refrigerant of the air conditioning system 10 releases heat at the condenser 61, the water temperature on the coolant side increases, and flows into the heater core 63 to release heat, thereby heating the passenger compartment.

[0067] If the battery pack 31 has a simultaneous heating demand, the opening ratio between the "a" and "c" valve ports of the second control valve 72 is adjusted, and the first water pump 32 pumps the hot water in the heating circuit 60 to the battery heat exchange circuit 30 to simultaneously meet the battery heating demand. The opening ratio between the "a" and "c" valve ports can control the cold and hot water flow ratio in the battery heat exchange circuit 30 to achieve different water temperature target requirements. When the battery pack 31 does not need to be heated, the "c" valve port and the "d" valve port of the second control valve 72 can be controlled to be connected, and the coolant circulates in the battery heat exchange circuit 30. The high-temperature coolant in the heating circuit 60 cannot enter, and the supply of high-temperature coolant is stopped.

[0068] Reference Figure 6 As shown, the fifth working mode of the thermal management system 100 of the embodiment of the present invention is: The valve ports "4" and "5" of the first control valve 71 are connected, the valve ports "7" and "9" are connected, the valve ports "2" and "3" are connected, the valve ports "c" and "d" of the second control valve 72 are connected, the second one-way valve 76, the third one-way valve 77 and the fourth one-way valve 78 are opened, and the remaining valve ports are closed. When the demand for air-conditioning and heating is low, the heat pump heating, air-conditioning refrigerant cooling and battery pack 31 temperature equalization functions are realized.

[0069] Coolant flow direction: second water pump 43 → radiator 41 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → heat exchanger 51 → second check valve 76 → second water pump 43; Condenser 61 → third water pump 64 → electric heater 62 → third one-way valve 77 → warm air core 63 → condenser 61; Condenser 61 → third water pump 64 → electric heater 62 → fourth check valve 78 → second water pump 43 → radiator 41 → first control valve 71 → condenser 61; First water pump 32 →battery pack 31 →second control valve 72 →first water pump 32 .

[0070] When the heating demand of the air-conditioning system 10 is low, the heat exchanger 51 is in the lowest power operating state, but the heat absorbed from the high-pressure heat exchange circuit 20 is still greater than the heating demand of the passenger compartment. The radiator 41 can be used to dissipate low-power heat of the high-temperature coolant at the condenser 61 to reduce the heat absorbed by the heat exchanger 51.

[0071] The coolant in the high-pressure heat exchange loop 20 carries the heat of the high-pressure components to exchange heat with the heat exchanger 51, and transfers the heat to the air-conditioning system 10. The cooled low-temperature coolant flows to the high-pressure heat exchange loop 20 to continue cooling the high-pressure components.

[0072] The refrigerant of the air-conditioning system 10 releases heat at the condenser 61, and the water temperature on the coolant side increases. A part of it flows into the heater core 63 to release heat, thereby heating the passenger compartment. The other part of it dissipates heat at the radiator 41 and then flows back to the condenser 61, thereby lowering the coolant temperature and meeting the heating needs of the passenger compartment.

[0073] The coolant circulates between the battery heat exchange circuit 30 and the second control valve 72 to maintain temperature uniformity between the various cells or modules of the battery pack 31, thereby avoiding problems such as performance degradation, safety hazards, and shortened life due to excessive temperature differences.

[0074] Reference Figure 7 As shown, the sixth working mode of the thermal management system 100 of the embodiment of the present invention is: The valve ports "5" and "6" of the first control valve 71 are connected, the valve ports "7" and "8" are connected, the valve ports "b" and "d" of the second control valve 72 are connected, the first check valve 75 and the third check valve 77 are opened, and the remaining valve ports are closed, thereby realizing the functions of heat pump heating, temperature equalization of high-voltage components and cooling of the battery pack 31.

[0075] Coolant flow direction: second water pump 43 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → second water pump 43; Condenser 61 → third water pump 64 → electric heater 62 → third one-way valve 77 → warm air core 63 → condenser 61; The first water pump 32 →the battery pack 31 →the first check valve 75 →the heat exchanger 51 →the second control valve 72 →the first water pump 32 .

[0076] The coolant circulates between the high-pressure heat exchange circuit 20 and the first control valve 71 to maintain temperature uniformity between high-pressure components and avoid problems such as performance degradation, safety hazards, and shortened life due to excessive temperature differences.

[0077] The coolant carries the heat of the battery pack 31 and exchanges heat with the heat exchanger 51 , and the temperature of the coolant drops, thereby cooling the battery pack 31 .

[0078] The high-temperature refrigerant of the air-conditioning system 10 releases heat at the condenser 61 , the water temperature on the coolant side rises, and flows into the heater core 63 to release heat, thereby heating the passenger compartment.

[0079] Reference Figure 8 As shown, the seventh working mode of the thermal management system 100 of the embodiment of the present invention is: The valve ports "5" and "6" of the first control valve 71 are connected, the valve ports "7" and "9" are connected, the valve ports "b" and "d" of the second control valve 72 are connected, the first one-way valve 75, the second one-way valve 76 and the third one-way valve 77 are opened, and the remaining valve ports are closed, thereby realizing the function of heating the battery pack 31 by heat pump heating and waste heat from the motor 21 or active heat generation.

[0080] Coolant flow direction: second water pump 43 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → heat exchanger 51 → second check valve 76 → second water pump 43; Condenser 61 → third water pump 64 → electric heater 62 → third one-way valve 77 → warm air core 63 → condenser 61; The first water pump 32 →the battery pack 31 →the first check valve 75 →the heat exchanger 51 →the second control valve 72 →the first water pump 32 .

[0081] When the air conditioner is turned on, the coolant carries the heat of the high-voltage components and the battery and exchanges heat with the heat exchanger 51. The temperature of the refrigerant rises and releases heat at the condenser 61. The water temperature on the coolant side rises and flows into the heater core 63 to release heat, thereby heating the passenger compartment.

[0082] When the air conditioner is turned off, the battery pack 31 is heated by the waste heat of the high-voltage components during driving or the heat actively generated by the motor 21. The coolant flows from the high-voltage heat exchange loop 20 and the battery heat exchange loop 30 to the heat exchanger loop 50 respectively, and mixes at the heat exchanger loop 50, but does not exchange heat with the heat exchanger 51. The high-temperature coolant carrying the waste heat of the high-voltage components or the heat actively generated by the motor 21 mixes with the coolant in the battery heat exchange loop 30, and the coolant flowing into the battery heat exchange loop 30 has a higher temperature than before, which can heat the battery pack 31.

[0083] Reference Fig. 9 As shown, the working mode eight of the thermal management system 100 of the embodiment of the present invention is: The valve ports "5" and "6" of the first control valve 71 are connected, the valve ports "7" and "8" are connected, the valve ports "1" and "2" are connected, the valve ports "a", "c" and "d" of the second control valve 72 are connected, the third one-way valve 77 is opened, and the remaining valve ports are closed, thereby realizing the functions of heat pump heating, uniform heating of high-voltage components and heating of the battery pack 31.

[0084] Coolant flow direction: second water pump 43 → first control valve 71 → motor controller 22 → motor 21 → first control valve 71 → second water pump 43; Condenser 61 → third water pump 64 → electric heater 62 → third one-way valve 77 → warm air core 63 → condenser 61; Condenser 61 →third water pump 64 →electric heater 62 →second control valve 72 →first water pump 32 →battery pack 31 →first control valve 71 →condenser 61 .

[0085] The coolant circulates between the high-pressure heat exchange circuit 20 and the first control valve 71 to maintain temperature uniformity between high-pressure components and avoid problems such as performance degradation, safety hazards, and shortened life due to excessive temperature differences.

[0086] The air conditioning system 10 generates heat through the compressor to increase the temperature of the refrigerant. The refrigerant releases heat at the condenser 61, and the water temperature on the coolant side increases. A part of it flows into the heater core 63 to release heat, thereby heating the passenger compartment, and the other part flows into the battery heat exchange circuit 30 to heat the battery pack 31.

[0087] After the battery pack 31 is heated, the second control valve 72 is switched to a state where the valve port “a” and the valve port “c” are connected to prevent the high-temperature coolant in the heating circuit 60 from flowing out.

[0088] Reference Fig.10 As shown, the working mode nine of the thermal management system 100 of the embodiment of the present invention is: The valve ports "4" and "5" of the first control valve 71 are connected, the valve ports "7" and "9" are connected, the valve ports "2" and "3" are connected, the valve ports "b" and "d" of the second control valve 72 are connected, the first one-way valve 75, the second one-way valve 76, the third one-way valve 77 and the fourth one-way valve 78 are all opened, and the remaining valve ports are closed, thereby realizing heat pump heating or high-voltage component cooling and battery pack 31 cooling functions.

[0089] Coolant flow direction: second water pump 43 → radiator 41 → motor controller 22 → motor 21 → first control valve 71 → heat exchanger 51 → second check valve 76 → second water pump 43; First water pump 32 →battery pack 31 →heat exchanger 51 →second control valve 72 →first water pump 32; Condenser 61 → third water pump 64 → electric heater 62 → third one-way valve 77 → warm air core 63 → condenser 61; Condenser 61 →third water pump 64 →electric heater 62 →radiator 41 →first control valve 71 →condenser 61 .

[0090] When the air conditioner is turned on, the coolant carries the heat of the high-voltage components and the battery and exchanges heat with the heat exchanger 51. The temperature of the refrigerant rises and releases heat at the condenser 61. The water temperature on the coolant side rises and flows into the heater core 63 to release heat, thereby heating the passenger compartment.

[0091] When the air conditioner is turned off, the coolant dissipates heat at the radiator 41 and becomes low-temperature coolant. The low-temperature coolant first cools the high-voltage components, and the coolant flows from the high-voltage heat exchange loop 20 and the battery heat exchange loop 30 to the heat exchanger loop 50, respectively, and mixes and exchanges heat at the heat exchanger loop 50, but does not exchange heat with the heat exchanger 51. At this time, the ambient temperature is low, such as low-temperature fast charging conditions, and air conditioning is not needed. The heat dissipation capacity of the radiator 41 meets the cooling requirements of the high-voltage components and the battery pack 31. The temperature of the coolant flowing to the battery pack 31 after mixing is reduced, thereby cooling the battery pack 31. The radiator 41 provides cooling capacity for the battery pack 31, achieving a battery pack 31 cooling function with lower energy consumption.

[0092] A vehicle according to an embodiment of the second aspect of the present invention includes a thermal management system 100 .

[0093] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0094] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0095] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A thermal management system, characterized in that: include: a first control valve (71), the first control valve (71) being connected to a high-pressure heat exchange circuit (20), a radiator circuit (40), a battery heat exchange circuit (30), a heat exchange circuit (50), and a heating circuit (60), the first control valve (71) selectively connecting one or more of the high-pressure heat exchange circuit (20), the radiator circuit (40), the battery heat exchange circuit (30), the heat exchange circuit (50), and the heating circuit (60); a second control valve (72), wherein two ends of the second control valve (72) are connected to two ends of the battery heat exchange circuit (30), another end of the second control valve (72) is connected to the heating circuit (60), and another end of the second control valve (72) is connected to the heat exchanger circuit (50); An air conditioning system (10), wherein the air conditioning system (10) exchanges heat with the heating circuit (60) and / or the heat exchanger circuit (50).

2. The thermal management system according to claim 1, characterized in that: The radiator circuit (40) comprises: a radiator (41), one end of the radiator (41) being connected to the heat exchanger circuit (50), the heating circuit (60) and the first control valve (71), and the other end of the radiator (41) being connected to the first control valve (71).

3. The thermal management system according to claim 2, characterized in that: The radiator circuit (40) comprises: a first multi-way tube (42), one end of the first multi-way tube (42) being connected to the other end of the radiator (41), and the other two ends of the first multi-way tube (42) being respectively connected to two ends of the first control valve (71).

4. The thermal management system according to claim 2, characterized in that: Also includes: a first branch (73), one end of the first branch (73) being in communication with the first control valve (71), and the other end of the first branch (73) being in communication with one end of the radiator (41); and The thermal management system further comprises: a second branch (74), wherein the second branch (74) is connected between the heating circuit (60) and the first control valve (71).

5. The thermal management system according to claim 1, characterized in that: The heating circuit (60) comprises: a condenser (61), an electric heater (62) and a heater core (63); the electric heater (62) and the condenser (61) are connected in series; one end of the condenser (61) is connected to the first control valve (71) and the heater core (63); the other end of the condenser (61) is connected to the electric heater (62); and the condenser (61) exchanges heat with the air conditioning system (10).

6. The thermal management system according to claim 1, characterized in that: One end of the heat exchanger circuit (50) is in communication with the first control valve (71) and the battery heat exchange circuit (30), and the other end of the heat exchanger circuit (50) is in communication with the radiator circuit (40), the first control valve (71) and the second control valve (72).

7. The thermal management system according to claim 1, characterized in that: A first one-way valve (75) is provided between one end of the heat exchanger circuit (50) and the battery heat exchange circuit (30); and, A second one-way valve (76) is provided between the other end of the heat exchanger circuit (50), the radiator circuit (40), and the first control valve (71).

8. The thermal management system according to claim 1, characterized in that: One end of the battery heat exchange circuit (30) is in communication with one end of the first control valve (71), and the other end of the battery heat exchange circuit (30) is in communication with the other end of the second control valve (72) and the first control valve (71).

9. The thermal management system according to claim 1, characterized in that: The second control valve (72) is a proportional regulating valve.

10. A vehicle, characterized in that: include: The thermal management system (100) according to any one of claims 1 to 9.

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