Thermal management system and vehicle

Abstract

The invention provides a thermal management system and a vehicle. The heat management system comprises a plurality of refrigeration parts, a power battery direct cooling and direct heating plate, a plate heat exchanger and a multi-way valve. And the plurality of refrigeration parts, the power battery direct-cooling and direct-heating plate and the plate heat exchanger are all communicated with the multi-way valve. And a plurality of switchable circulation paths are arranged in the multi-way valve. And the plurality of circulation paths, the plurality of refrigeration parts, the power battery direct cooling and direct heating plate and the plate heat exchanger form a plurality of refrigerant loops. According to the application, the plurality of refrigeration parts, the power battery direct-cooling and direct-heating plate and the plate heat exchanger are connected to the multi-way valve, the flowing path of the refrigerant is flexibly adjusted according to requirements, the heat management requirements under different conditions are met, the integration level is high, and the control difficulty is low.

Description

Technical Field

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

[0002] In traditional fuel vehicles, the engine coolant system and the air conditioning refrigerant system are often independent and relatively simple. In new energy vehicles such as pure electric vehicles, in order to save energy and increase battery life, the heat of systems such as motors, batteries and air conditioners will be managed in a unified manner, collectively referred to as a thermal management system. This system is more complex than traditional fuel vehicles. In plug-in hybrid vehicles, there are not only engines, but also motors, batteries and air conditioners, and its thermal management system is more complex. The more components and modes that need to be heated and cooled in the thermal management system, the more complex its control of the fluid is, so multi-way valves came into being. The emergence of multi-way valves allows complex thermal management systems to meet control requirements by controlling only a few valves, reducing the difficulty of control and manufacturing costs.

[0003] In new energy vehicles, because batteries are prone to fire, they need special consideration in the thermal management system. According to the fluid used for battery cooling and heating, the thermal management system is mainly divided into a coolant system (the fluid is the coolant) and a refrigerant system (the fluid is the refrigerant used in the air-conditioning system). The coolant system has a lower pressure, usually several atmospheres, and cannot be combined with the air-conditioning system. The cooling and heating of the battery is more uniform, but the efficiency is lower. The refrigerant system has a higher pressure, usually dozens of atmospheres, and can be combined with the air-conditioning system. The cooling and heating efficiency of the battery is high, but the cooling is not very uniform.

[0004] In the prior art, multi-way valves are mainly used in coolant systems. In refrigerant systems, they are currently mainly realized by a certain number of solenoid valves (switch control) and electronic expansion valves (flow regulation), etc., which have low integration, many control components, and high manufacturing costs.

[0005] Therefore, it is necessary to provide an improved thermal management system and vehicle to solve the above problems. Summary of the invention

[0006] The present application provides a thermal management system and a vehicle with high integration and low control difficulty.

[0007] The present application discloses a thermal management system, comprising a plurality of refrigeration components, a power battery direct cooling and heating plate, a plate heat exchanger and a multi-way valve; the plurality of refrigeration components, the power battery direct cooling and heating plate and the plate heat exchanger are all connected to the multi-way valve; a plurality of switchable flow paths are arranged in the multi-way valve; the plurality of flow paths and the plurality of refrigeration components, the power battery direct cooling and heating plate and the plate heat exchanger form a plurality of refrigerant circuits.

[0008] Furthermore, the plurality of refrigeration components include a vapor-liquid separator, a compressor, an in-vehicle condenser, an air-heating PTC, an evaporator and an out-vehicle condenser.

[0009] Furthermore, a flow regulating device is provided on at least one of the flow paths; the flow regulating device includes a first flow regulating device, which is an electronic expansion valve, and the electronic expansion valve can regulate the flow of the at least one flow path when other flow paths are normally open or normally closed.

[0010] Furthermore, the flow regulating device includes a second flow regulating device, which is a flow regulating hole, and the flow regulating hole performs flow regulation through the relative rotation of the moving valve core and the static valve core of the multi-way valve.

[0011] Furthermore, at least one of the flow paths is provided with a one-way valve; and the plurality of flow paths are all one-way flows.

[0012] Furthermore, the thermal management system further comprises a motor coolant circuit, the plate heat exchanger is arranged on the motor coolant circuit, and at least one of the refrigerant circuits performs heat exchange with the motor coolant circuit through the plate heat exchanger.

[0013] Furthermore, the motor coolant circuit includes a motor radiator, a water pump, a motor, a motor controller and a three-way water valve; the motor radiator, the water pump, the motor, the motor controller and the plate heat exchanger are connected in sequence; the three-way water valve is simultaneously connected to the motor radiator, the water pump and the plate heat exchanger.

[0014] Furthermore, the multi-way valve includes 11 interfaces, the flow paths are 10, and the multiple refrigerant circuits include at least two of an air-conditioning heating circuit, a battery heating circuit, an air-conditioning heating and battery heating circuit, a battery cooling circuit, a battery cooling and air-conditioning refrigeration circuit, and an air-conditioning heating and battery cooling circuit.

[0015] Furthermore, the multi-way valve includes a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface, a tenth interface and an eleventh interface, the first end of the vapor-liquid separator is connected to the first interface, the second end of the vapor-liquid separator is connected to the first end of the compressor, and the second end of the compressor is simultaneously connected to the second interface, the first end of the in-vehicle condenser and the first end of the wind-heating PTC; the second end of the in-vehicle condenser and the second end of the wind-heating PTC are both connected to the third interface; the first end and the second end of the evaporator are respectively connected to the fourth interface and the fifth interface; the first end and the second end of the out-of-vehicle condenser are respectively connected to the sixth interface and the seventh interface; the first end and the second end of the plate heat exchanger are respectively connected to the eighth interface and the ninth interface; the first end and the second end of the power battery direct cooling and direct heating plate are respectively connected to the tenth interface and the eleventh interface.

[0016] Further, a first flow path is provided between the third interface and the eighth interface; a second flow path is provided between the third interface and the sixth interface; a third flow path is provided between the second interface and the tenth interface; a fourth flow path is provided between the tenth interface and the first interface; a fifth flow path is provided between the fourth interface and the first interface; a sixth flow path is provided between the ninth interface and the first interface; a seventh flow path is provided between the ninth interface and the eleventh interface; an eighth flow path is provided between the seventh interface and the eleventh interface; a ninth flow path is provided between the seventh interface and the fifth interface; and a tenth flow path is provided between the eleventh interface and the eighth interface.

[0017] Furthermore, the air conditioning and heating circuit includes the first flow path and the sixth flow path; the battery heating circuit includes the third flow path, the tenth flow path and the sixth flow path; the air conditioning and heating and battery heating circuits include the first flow path, the third flow path, the tenth flow path and the sixth flow path, wherein the first flow path is located on a branch, the third flow path and the tenth flow path are located on another parallel branch, and the sixth flow path is located on the main circuit.

[0018] Furthermore, the battery cooling circuit includes the second flow path, the eighth flow path and the fourth flow path; the battery cooling and air-conditioning refrigeration circuit includes the second flow path, the eighth flow path, the fourth flow path, the ninth flow path and the fifth flow path, the second flow path is located on the main circuit, the eighth flow path and the fourth flow path are located on a branch, and the ninth flow path and the fifth flow path are located on another parallel branch; the air-conditioning heating and battery cooling circuit includes the first flow path, the seventh flow path and the fourth flow path.

[0019] Furthermore, the second flow regulating device includes an electronic expansion valve, a first flow regulating hole and a second flow regulating hole; the electronic expansion valve can control the flow of the tenth flow path and the eighth flow path; the first flow regulating hole can control the flow of the ninth flow path, and the second flow regulating hole can control the flow of the first flow path.

[0020] Furthermore, a first one-way valve is provided on the fourth flow path; a second one-way valve is provided on the fifth flow path; the eighth flow path partially overlaps with the ninth flow path, a third one-way valve is provided on the overlapping part, and a fourth one-way valve is also provided on the eighth flow path; and a fifth one-way valve is provided on the tenth flow path.

[0021] The present application also discloses a vehicle, comprising the above-mentioned thermal management system.

[0022] The thermal management system and vehicle of the present application connect multiple refrigeration components, direct cooling and heating plates of power batteries and plate heat exchangers to a multi-way valve. The multi-way valve can flexibly adjust the flow path of the refrigerant according to needs to meet the thermal management needs in different situations, reducing the control difficulty. At the same time, the thermal management system of the present application has a small number of overall components and a high degree of integration; and the manufacturing cost is low.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0025] Figure 1 It is a connection diagram of the thermal management system of this application.

[0026] Figure 2 It is a connection diagram of the air conditioning and heating circuit in the thermal management system of the present application.

[0027] Figure 3 It is a connection diagram of the battery heating circuit in the thermal management system of the present application.

[0028] Figure 4 It is a connection diagram of the air conditioning heating and battery heating circuits in the thermal management system of this application.

[0029] Figure 5 It is a connection diagram of the battery cooling circuit in the thermal management system of the present application.

[0030] Figure 6 It is a connection diagram of the battery cooling and air conditioning refrigeration circuits in the thermal management system of the present application.

[0031] Figure 7 It is a connection diagram of the air conditioning heating and battery cooling circuits in the thermal management system of this application.

[0032] Figure 8 yes Figure 1 An exploded view of a multi-port valve in a thermal management system is shown.

[0033] Fig. 9 yes Figure 8 A cross-sectional view of a multi-port valve is shown.

[0034] Fig.10 yes Figure 8 A bottom view of the valve body of the multi-way valve is shown.

[0035] Fig.11 yes Figure 8 A three-dimensional view of the stationary valve core is shown.

[0036] Fig.12 yes Figure 8 A three-dimensional view of the moving valve core is shown.

[0037] Description of Figure Numbers:

[0038] 100, air conditioning and heating circuit; 10, power battery direct cooling and heating plate; 11, first pressure and temperature sensor; 12, second temperature sensor; 200, battery heating circuit; 20, plate heat exchanger; 300, air conditioning and heating and battery heating circuit; 30, multi-way valve; P1, first interface; P2, second interface; P3, third interface; P4, fourth interface; P5, fifth interface; P6, sixth interface; P7, seventh interface; P8, eighth interface; P9, ninth interface; P10, tenth interface; P11, eleventh interface; L1, first flow path; L2, second flow path; L3, third flow path; L 4. Fourth flow path; L5. Fifth flow path; L6. Sixth flow path; L7. Seventh flow path; L8. Eighth flow path; L9. Ninth flow path; L10. Tenth flow path; C1. First one-way valve; C2. Second one-way valve; C3. Third one-way valve; C4. Fourth one-way valve; C5. Fifth one-way valve; 1. Valve body; 101. Flow channel; 1011. First opening; 1012. Second opening; 1015. Balance hole; 1018. Groove; 102. Inner joint surface; 103. Horizontal groove; 104. Vertical groove; 13. One-way valve; 14. Connector; 2. Static valve core; 211. Fifth circumference ; 212, sixth circumference; 213, seventh circumference; 214, eighth circumference; 21, S11, S12, S21, S22, S31, S32, S41, S42, S51, S52, S61, S62, through hole; E1, E11, E12, first flow regulating hole; E2, electronic expansion valve; E3, E31, E32, second flow regulating hole; 3, moving valve core; 311, first circumference; 312, second circumference; 313, third circumference; 314, fourth circumference; 31, 3111, 3112, 3121, 3122, 3131, 3132, 3141, 3142 , 3143, 3144, conduction groove; 6, actuator; 8, angle measurement component; 400, battery cooling circuit; 40, gas-liquid separator; 41, second pressure-temperature sensor; 500, battery cooling and air-conditioning refrigeration circuit; 50, compressor; 51, first pressure sensor; 52, first temperature sensor; 600, air-conditioning heating and battery cooling circuit; 60, in-vehicle condenser; 700, motor coolant circuit; 710, motor radiator; 720, water pump; 730, motor; 740, motor controller; 750, three-way water valve; 70, wind heating PTC; 80, evaporator; 90, outdoor condenser. DETAILED DESCRIPTION

[0039] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0040] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0041] Next, the embodiments of the present application are described in detail.

[0042] like Figure 1 As shown, the present application provides a thermal management system, including multiple refrigeration components, a power battery direct cooling and direct heating plate 10, a plate heat exchanger 20 and a multi-way valve 30. Multiple refrigeration components, the power battery direct cooling and direct heating plate 10 and the plate heat exchanger 20 are all connected to the multi-way valve 30. Multiple switchable flow paths are provided in the multi-way valve 30. The multiple flow paths and the multiple refrigeration components, the power battery direct cooling and direct heating plate 10 and the plate heat exchanger 20 form multiple refrigerant circuits.

[0043] The plurality of refrigeration components include a vapor-liquid separator 40, a compressor 50, an in-vehicle condenser 60, an air-heating PTC 70, an evaporator 80, and an out-vehicle condenser 90. In the figure, the multi-way valve 30 includes 11 interfaces, namely: a first interface P1, a second interface P2, a third interface P3, a fourth interface P4, a fifth interface P5, a sixth interface P6, a seventh interface P7, an eighth interface P8, a ninth interface P9, a tenth interface P10, and an eleventh interface P11.

[0044] The first end and the second end of the power battery direct cooling and direct heating plate 10 are connected to the tenth interface P10 and the eleventh interface P11 respectively. The first end and the second end of the plate heat exchanger 20 are connected to the eighth interface P8 and the ninth interface P9 respectively. The first end of the vapor-liquid separator 40 is connected to the first interface P1, and the second end of the vapor-liquid separator 40 is connected to the first end of the compressor 50. The second end of the compressor 50 is simultaneously connected to the second interface P2, the first end of the in-vehicle condenser 60, and the first end of the wind-heating PTC70. The second end of the in-vehicle condenser 60 and the second end of the wind-heating PTC70 are both connected to the third interface P3. The first end and the second end of the evaporator 80 are connected to the fourth interface P4 and the fifth interface P5 respectively. The first end and the second end of the external condenser 90 are connected to the sixth interface P6 and the seventh interface P7 respectively.

[0045] The in-vehicle condenser 60 and the wind heating PTC 70 are arranged together and share the same input terminal and the same output terminal. When the wind heating PTC 70 is in the off state, the second end of the compressor 50 and the second interface P2 are simultaneously connected to the first end of the in-vehicle condenser 60, and the second end of the in-vehicle condenser 60 is connected to the third interface P3.

[0046] A second pressure and temperature sensor 41 is provided between the first interface P1 and the first end of the vapor-liquid separator 40 to monitor the pressure and temperature of the refrigerant before it enters the vapor-liquid separator 40. A first pressure sensor 51 and a first temperature sensor 52 are provided between the second end of the compressor 50 and the first end of the in-vehicle condenser 60. The first pressure sensor 51 monitors the pressure state of the second end of the compressor 50 and provides pressure data. The first temperature sensor 52 monitors the temperature state of the second end of the compressor 50 and provides temperature data.

[0047] A first pressure and temperature sensor 11 is provided between the first end of the power battery direct cooling and heating plate 10 and the tenth interface P10 to monitor the pressure and temperature of the refrigerant before it enters the power battery direct cooling and heating plate 10. A second temperature sensor 12 is provided between the second end of the power battery direct cooling and heating plate 10 and the eleventh interface P11 to monitor the temperature state of the refrigerant after it flows out of the power battery direct cooling and heating plate 10 and provide temperature data.

[0048] The multi-way valve 30 further includes an actuator 6, which is used to control the opening and closing of each interface of the multi-way valve 30 and the opening and closing of multiple refrigerant circuits, so that the refrigerant flows in different flow paths.

[0049] The number of flow paths is 10, namely, a first flow path L1, a second flow path L2, a third flow path L3, a fourth flow path L4, a fifth flow path L5, a sixth flow path L6, a seventh flow path L7, an eighth flow path L8, a ninth flow path L9 and a tenth flow path L10.

[0050] A flow regulating device is provided on at least one flow path. The flow regulating device includes a first flow regulating device, which is an electronic expansion valve E2. The electronic expansion valve E2 can regulate the flow of at least one flow path when other flow paths are normally open or normally closed. The flow regulating device includes a second flow regulating device, which is a flow regulating hole E1, E3. The flow regulating hole regulates the flow through the relative rotation of the moving valve core and the static valve core of the multi-way valve.

[0051] At least one flow path is provided with a one-way valve. Multiple flow paths are all one-way flows. In some embodiments, a flow path is provided with both a one-way valve and a flow regulating device.

[0052] The first flow regulating hole E1 is provided as a pair, namely the first flow regulating hole E11 and the first flow regulating hole E12 , and the second flow regulating hole E3 is provided as a pair, namely the second flow regulating hole E31 and the second flow regulating hole E32 .

[0053] See also Figure 8 , Fig.11 and Fig.12 As shown, the multi-way valve 30 includes a static valve core 2 and a dynamic valve core 3 which are arranged in a stacked manner. The dynamic valve core 3 is provided with a plurality of arc-shaped conduction grooves, which are arranged on a plurality of circumferences concentric with the dynamic valve core 3. The plurality of circumferences include a first circumference 311, a second circumference 312, a third circumference 313 and a fourth circumference 314 which are arranged from the inside to the outside. The number of conduction grooves is ten. The first circumference 311 is provided with conduction grooves 3111 and 3112, the second circumference 312 is provided with conduction grooves 3121 and 3122, the third circumference 313 is provided with conduction grooves 3131 and 3132, and the fourth circumference 314 is provided with conduction grooves 3141, 3142, 3143 and 3144.

[0054] A plurality of through holes are arranged in pairs on the static valve core 2, and a plurality of pairs of through holes are arranged on a plurality of circumferences concentric with the static valve core 2, and each pair of through holes is arranged on the same circumference. The plurality of circumferences include a fifth circumference 211, a sixth circumference 212, a seventh circumference 213, and an eighth circumference 214 which are sequentially distributed from the inside to the outside. The static valve core 2 is provided with eight pairs of through holes, and each circumference is provided with two pairs of through holes. The plurality of circumferences on the static valve core 2 are arranged correspondingly to the plurality of circumferences on the moving valve core 3.

[0055] The fifth circumference 211 is provided with through holes S11 and S12, through holes S51 and S52, the sixth circumference 212 is provided with through holes S21 and S22, through holes S31 and S32, the seventh circumference 213 is provided with through holes S41 and S42, through holes S61 and S62, and the eighth circumference 214 is provided with first flow regulating holes E11 and E12, second flow regulating holes E31 and E32.

[0056] A first flow path L1 is provided between the third port P3 and the eighth port P8. The refrigerant in the first flow path L1 flows sequentially through the third port P3, the second flow regulating hole E32, the conducting groove 3143, the second flow regulating hole E31, the through hole S62, the through hole S52, the through hole S42, the conducting groove 3131, the through hole S41 and the eighth port P8. The second flow regulating hole E31 and the second flow regulating hole E32 can control the flow of the first flow path L1.

[0057] A second flow path L2 is provided between the third port P3 and the sixth port P6. The refrigerant in the second flow path L2 flows through the third port P3, the second flow regulating hole E32, the through hole S61, the conducting groove 3132, the through hole S62, the through hole S52, the conducting groove 3112, the through hole S51 and the sixth port P6 in sequence.

[0058] A third flow path L3 is provided between the second port P2 and the tenth port P10. The refrigerant in the third flow path L3 flows through the second port P2, the through hole S12, the conducting groove 3111, the through hole S11, the through hole S21 and the tenth port P10 in sequence.

[0059] A fourth flow path L4 is provided between the tenth port P10 and the first port P1. A first check valve C1 is provided on the fourth flow path L4. The refrigerant in the fourth flow path L4 flows through the tenth port P10, the through hole S21, the conducting groove 3122, the through hole S22, the first check valve C1, the through hole S32 and the first port P1 in sequence.

[0060] A fifth flow path L5 is provided between the fourth port P4 and the first port P1. A second check valve C2 is provided on the fifth flow path L5. The refrigerant in the fifth flow path L5 flows through the fourth port P4, the second check valve C2, the through hole S32 and the first port P1 in sequence.

[0061] A sixth flow path L6 is provided between the ninth port P9 and the first port P1. The refrigerant in the sixth flow path L6 flows through the ninth port P9, the first flow regulating hole E11, the through hole S31, the conducting groove 3121, the through hole S32 and the first port P1 in sequence.

[0062] A seventh flow path L7 is provided between the ninth port P9 and the eleventh port P11. A fourth check valve C4 and an electronic expansion valve E2 are provided on the seventh flow path L7. The refrigerant in the seventh flow path L7 flows through the ninth port P9, the first flow regulating hole E11, the fourth check valve C4, the electronic expansion valve E2 and the eleventh port P11 in sequence. The electronic expansion valve E2 can control the flow of the seventh flow path L7.

[0063] An eighth flow path L8 is provided between the seventh port P7 and the eleventh port P11. The eighth flow path L8 is provided with a third one-way valve C3, a fourth one-way valve C4 and an electronic expansion valve E2. The refrigerant in the eighth flow path flows through the seventh port P7, the third one-way valve C3, the fourth one-way valve C4, the electronic expansion valve E2 and the eleventh port P11 in sequence. The electronic expansion valve E2 can control the flow rate of the eighth flow path L8.

[0064] A ninth flow path L9 is provided between the seventh port P7 and the fifth port P5. The eighth flow path L8 partially overlaps with the ninth flow path L9, and a third one-way valve C3 is provided on the overlapping portion. The refrigerant in the ninth flow path L9 flows through the seventh port P7, the third one-way valve C3, the first flow regulating hole E11, the conducting groove 3141, the first flow regulating hole E12 and the fifth port P5 in sequence. The first flow regulating hole E11 and the first flow regulating hole E12 can control the flow of the ninth flow path L9.

[0065] A tenth flow path L10 is provided between the eleventh port P11 and the eighth port P8. An electronic expansion valve E2 and a fifth check valve C5 are provided on the tenth flow path L10. The refrigerant in the tenth flow path L10 flows sequentially through the eleventh port P11, the electronic expansion valve E2, the fifth check valve C5, the second flow regulating hole E31, the through hole S62, the through hole S52, the through hole S42, the conduction groove 3131, the through hole S41, and the eighth port P8. The electronic expansion valve E2 can control the flow of the tenth flow path L10.

[0066] The multiple refrigerant circuits include at least two of: an air conditioning and heating circuit 100, a battery heating circuit 200, an air conditioning and heating and battery heating circuit 300, a battery cooling circuit 400, a battery cooling and air conditioning and refrigeration circuit 500, and an air conditioning and heating and battery cooling circuit 600. The thermal management system also includes a motor coolant circuit 700, and at least one refrigerant circuit performs heat exchange with the motor coolant circuit 700.

[0067] like Figure 2 As shown, when the vehicle's cab needs to be heated, the thermal management system turns on the first mode, and the air conditioning and heating loop 100 and the motor coolant loop 700 work simultaneously. The plate heat exchanger 20 is disposed on the motor coolant loop 700, and the air conditioning and heating loop 100 exchanges heat with the motor coolant loop 700 through the plate heat exchanger 20.

[0068] The air conditioning and heating circuit 100 includes a first flow path L1 and a sixth flow path L6. The air conditioning and heating circuit 100 is provided with a vapor-liquid separator 40, a compressor 50, an in-vehicle condenser 60, a multi-way valve 30 and a plate heat exchanger 20 in sequence. The refrigerant flows through the sixth flow path L6, the vapor-liquid separator 40, the compressor 50, the in-vehicle condenser 60, the first flow path L1 and the plate heat exchanger 20 in sequence and flows back to the sixth flow path L6 to form a closed-loop air conditioning and heating circuit 100. In the first mode, the wind heating PTC70 is in working state, and together with the in-vehicle condenser 60, the cab of the vehicle is heated. The wind heating PTC70 can be turned on or off according to demand. When the cab temperature is high, the wind heating PTC70 does not need to be turned on, and the cab is heated only through the in-vehicle condenser 60 to achieve energy saving.

[0069] The motor coolant circuit 700 includes a motor radiator 710, a water pump 720, a motor 730, a motor controller 740 and a three-way water valve 750. The motor radiator 710, the water pump 720, the motor 730, the motor controller 740 and the plate heat exchanger 20 are connected in sequence. The three-way water valve 750 is connected to the motor radiator 710, the water pump 720 and the plate heat exchanger 20 at the same time. The coolant flows through the first coolant flow channel and the second coolant flow channel at the same time. The first coolant flow channel: the motor radiator 710, the water pump 720, the motor 730, the motor controller 740, the plate heat exchanger 20, the three-way water valve 750, and the motor radiator 710. The second coolant flow channel: the motor radiator 710, the three-way water valve 750, and the motor radiator 710.

[0070] like Figure 3 As shown, when the battery of the vehicle needs to be heated, the thermal management system turns on the second mode, and the battery heating circuit 200 and the motor coolant circuit 700 work simultaneously. The plate heat exchanger 20 is arranged on the motor coolant circuit 700, and the battery heating circuit 200 exchanges heat with the motor coolant circuit 700 through the plate heat exchanger 20.

[0071] The battery heating circuit 200 includes a third flow path L3, a tenth flow path L10 and a sixth flow path L6. The battery heating circuit 200 is provided with a vapor-liquid separator 40, a compressor 50, a power battery direct cooling and heating plate 10, a multi-way valve 30 and a plate heat exchanger 20. The refrigerant flows through the third flow path L3, the power battery direct cooling and heating plate 10, the tenth flow path L10, the plate heat exchanger 20, the sixth flow path L6, the vapor-liquid separator 40 and the compressor 50 in sequence and flows back to the third flow path L3 to form a closed-loop battery heating circuit 200.

[0072] like Figure 4 As shown, when the vehicle's cab needs to be heated and the battery needs to be heated, the thermal management system turns on the third mode, and the air conditioning heating and battery heating circuit 300 and the motor coolant circuit 700 work simultaneously. The plate heat exchanger 20 is arranged on the motor coolant circuit 700, and the air conditioning heating and battery heating circuit 300 exchanges heat with the motor coolant circuit 700 through the plate heat exchanger 20.

[0073] The air conditioning, heating and battery heating circuit 300 includes a first flow path L1, a third flow path L3, a tenth flow path L10 and a sixth flow path L6. The air conditioning, heating and battery heating circuit 300 is provided with a vapor-liquid separator 40, a compressor 50, an in-vehicle condenser 60, a power battery direct cooling and direct heating plate 10, a multi-way valve 30 and a plate heat exchanger 20. The refrigerant flows through the sixth flow path L6, the vapor-liquid separator 40, the compressor 50, the third flow path L3, the power battery direct cooling and direct heating plate 10, the tenth flow path L10 and the plate heat exchanger 20 and flows back to the sixth flow path L6. The refrigerant also flows through the sixth flow path L6, the vapor-liquid separator 40, the compressor 50, the in-vehicle condenser 60, the first flow path L1, the plate heat exchanger 20 and the sixth flow path L6 at the same time to form a closed-loop air conditioning, heating and battery heating circuit 300. The first flow path L1 is located on a branch road, the third flow path L3 and the tenth flow path L10 are located on another parallel branch road, and the sixth flow path L6 is located on the main loop.

[0074] In the third mode, the wind heating PTC 70 is in operation, and together with the in-vehicle condenser 60 , heats the vehicle's cabin.

[0075] like Figure 5 As shown, when the battery of the vehicle needs to be cooled, the thermal management system turns on the fourth mode, and the battery cooling circuit 400 and the motor coolant circuit 700 work simultaneously. The plate heat exchanger 20 is arranged on the motor coolant circuit 700, and the battery cooling circuit 400 exchanges heat with the motor coolant circuit 700 through the plate heat exchanger 20.

[0076] The battery cooling circuit 400 includes a second flow path L2, an eighth flow path L8 and a fourth flow path L4. The battery cooling circuit 400 is provided with a vapor-liquid separator 40, a compressor 50, an in-vehicle condenser 60, a power battery direct cooling and direct heating plate 10, an out-vehicle condenser 90, a multi-way valve 30 and a plate heat exchanger 20. The refrigerant flows sequentially through the second flow path L2, the out-vehicle condenser 90, the eighth flow path L8, the power battery direct cooling and direct heating plate 10, the fourth flow path L4 and the in-vehicle condenser 60 and flows back to the second flow path L2 to form a closed-loop battery cooling circuit 400.

[0077] like Figure 6 As shown, when the vehicle's cab needs to be cooled and the vehicle's battery needs to be cooled, the thermal management system turns on the fifth mode, and the battery cooling and air conditioning refrigeration circuit 500 and the motor coolant circuit 700 work simultaneously. In the fifth mode, the battery cooling and air conditioning refrigeration circuit 500 and the motor coolant circuit 700 do not perform heat exchange.

[0078] The battery cooling and air conditioning refrigeration circuit 500 includes a second flow path L2, an eighth flow path L8, a fourth flow path L4, a ninth flow path L9 and a fifth flow path L5. The battery cooling and air conditioning refrigeration circuit 500 is provided with a vapor-liquid separator 40, a compressor 50, an in-vehicle condenser 60, a power battery direct cooling and direct heating plate 10, an evaporator 80, an out-vehicle condenser 90 and a multi-way valve 30. The refrigerant flows through the second flow path L2, the out-vehicle condenser 90, the ninth flow path L9, the evaporator 80, the fifth flow path L5, the vapor-liquid separator 40, the compressor 50 and the in-vehicle condenser 60 in sequence and flows back to the second flow path L2. The refrigerant also flows through the second flow path L2, the out-vehicle condenser 90, the eighth flow path L8, the power battery direct cooling and direct heating plate 10, the fourth flow path L4, the vapor-liquid separator 40, the compressor 50 and the in-vehicle condenser 60 and flows back to the second flow path L2 to form a closed-loop battery cooling and air conditioning refrigeration circuit 500. The second flow path L2 is located on the main loop, the eighth flow path L8 and the fourth flow path L4 are located on a branch road, and the ninth flow path L9 and the fifth flow path L5 are located on another parallel branch road.

[0079] like Figure 7 As shown, when the vehicle's cab needs to be heated and the vehicle's battery needs to be cooled, the thermal management system turns on the sixth mode, and the air conditioning heating and battery cooling loop 600 and the motor coolant loop 700 work simultaneously. The plate heat exchanger 20 is disposed on the motor coolant loop 700, and the air conditioning heating and battery cooling loop 600 exchanges heat with the motor coolant loop 700 through the plate heat exchanger 20.

[0080] The air conditioning heating and battery cooling circuit 600 includes a first flow path L1, a seventh flow path L7 and a fourth flow path L4. The air conditioning heating and battery cooling circuit 600 is provided with a vapor-liquid separator 40, a compressor 50, an in-vehicle condenser 60, a power battery direct cooling and direct heating plate 10, a multi-way valve 30 and a plate heat exchanger 20. The refrigerant flows through the first flow path L1, the plate heat exchanger 20, the seventh flow path L7, the power battery direct cooling and direct heating plate 10, the fourth flow path L4, the vapor-liquid separator 40, the compressor 50 and the in-vehicle condenser 60 in sequence and flows back to the first flow path L1 to form a closed-loop air conditioning heating and battery cooling circuit 600.

[0081] In the sixth mode, the wind heating PTC 70 is in operation, and together with the in-vehicle condenser 60 , heats the vehicle's cabin.

[0082] The present application also discloses a vehicle, including a thermal management system as described above. The thermal management system manages the heat of the motor, battery, air conditioner, etc. in a unified manner. The current thermal management system is mainly divided into a coolant system (the flowing medium is the coolant) and a refrigerant system (the flowing medium is the refrigerant used in the air conditioning system). In the embodiment of the present application, the multi-way valve is used in the refrigerant system.

[0083] like Figures 8 to 10 As shown, the multi-way valve 30 includes: a valve body 1, having a plurality of flow channels 101; a static valve core 2, arranged in the valve body 1, and having a plurality of through holes 21 connected to the flow channels 101; a moving valve core 3, arranged in the valve body 1, and having a plurality of conducting grooves 31, and the moving valve core 3 rotates relative to the static valve core 2 to form different flow paths between the conducting grooves 31 and the through holes 21; an electronic expansion valve E2, arranged on one of the flow channels 101 to control the flow of the flow channel 101.

[0084] The static valve core 2 and the dynamic valve core 3 are arranged overlappingly. The dynamic valve core 3 is provided with the arc-shaped conducting groove 31 , and the static valve core 2 is provided with a plurality of through holes 21 .

[0085] Each flow channel 101 includes a transverse groove 103 and a vertical groove 104 that are connected to each other. The valve body 1 has an inner joint surface 102 that abuts against the static valve core 2. The vertical groove 104 includes a first opening 1011 provided on the inner joint surface 102, and the transverse groove 103 includes a second opening 1012 provided on the side of the valve body 1. A groove 1018 is provided on the inner joint surface 102, and the groove 1018 is used to directly connect the two first openings 1011.

[0086] The first opening 1011 includes a balancing hole 1015, which is aligned with and communicated with a through hole 21. The balancing hole 1015 can help achieve the balance of the internal pressure of the valve body 1, avoid the multi-way valve from being stuck or inflexible due to pressure difference, and improve the response speed and operational flexibility of the multi-way valve.

[0087] The multi-way valve 30 further includes a connector 14 corresponding to the 11 interfaces, and the connector 14 is disposed in the second opening 1012. The multi-way valve 30 further includes a one-way valve 13, and the one-way valve 13 is disposed in the transverse groove 103 to control the flow direction of the medium in the flow path.

[0088] The multi-way valve 30 further includes an angle measuring assembly 8 . The angle measuring assembly 8 is connected to the actuator 6 by signals, and the angle measuring assembly 8 transmits the rotation signal of the moving valve core 3 to the actuator 6 .

[0089] The thermal management system and vehicle of the present application are provided with a multi-way valve, and multiple refrigeration components, direct cooling and heating plates of power batteries and plate heat exchangers are connected to the multi-way valve. The flow path of the refrigerant is flexibly adjusted according to demand by controlling the multi-way valve to meet the thermal management needs in different situations, thereby reducing the control difficulty and manufacturing cost. A complex thermal management system only needs to control the multi-way valve, electronic expansion valve and check valve to meet the control requirements, thereby reducing the control difficulty. At the same time, the number of components in the thermal management system is relatively small, which also reduces the manufacturing cost.

[0090] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A thermal management system, characterized in that: It includes multiple refrigeration components, direct cooling and heating plates for power batteries, plate heat exchangers and multi-way valves; the multiple refrigeration components, direct cooling and heating plates for power batteries and plate heat exchangers are all connected to the multi-way valve; the multi-way valve is provided with multiple switchable flow paths; the multiple flow paths and the multiple refrigeration components, the direct cooling and heating plates for power batteries and the plate heat exchanger form multiple refrigerant circuits.

2. The thermal management system according to claim 1, characterized in that: The multiple refrigeration components include a vapor-liquid separator, a compressor, an in-vehicle condenser, an air-heating PTC, an evaporator and an out-vehicle condenser.

3. The thermal management system according to claim 2, characterized in that: A flow regulating device is provided on at least one of the flow paths; the flow regulating device comprises a first flow regulating device, which is an electronic expansion valve, and the electronic expansion valve can regulate the flow of the at least one flow path when other flow paths are normally open or normally closed.

4. The thermal management system according to claim 3, characterized in that: The flow regulating device includes a second flow regulating device, which is a flow regulating hole. The flow regulating hole regulates the flow through the relative rotation of the moving valve core and the static valve core of the multi-way valve.

5. The thermal management system according to claim 1, characterized in that: At least one of the flow paths is provided with a one-way valve; and the plurality of flow paths are all one-way flows.

6. The thermal management system according to claim 1, characterized in that: The thermal management system further includes a motor coolant circuit, the plate heat exchanger is arranged on the motor coolant circuit, and at least one refrigerant circuit exchanges heat with the motor coolant circuit through the plate heat exchanger.

7. The thermal management system according to claim 6, characterized in that: The motor coolant circuit includes a motor radiator, a water pump, a motor, a motor controller and a three-way water valve; the motor radiator, the water pump, the motor, the motor controller and the plate heat exchanger are connected in sequence; the three-way water valve is simultaneously connected to the motor radiator, the water pump and the plate heat exchanger.

8. The thermal management system according to claim 4, characterized in that: The multi-way valve includes 11 interfaces, the flow paths are 10, and the multiple refrigerant circuits include at least two of an air conditioning heating circuit, a battery heating circuit, an air conditioning heating and battery heating circuit, a battery cooling circuit, a battery cooling and air conditioning refrigeration circuit, and an air conditioning heating and battery cooling circuit.

9. The thermal management system according to claim 8, characterized in that: The multi-way valve includes a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface, a tenth interface and an eleventh interface. The first end of the vapor-liquid separator is connected to the first interface, the second end of the vapor-liquid separator is connected to the first end of the compressor, and the second end of the compressor is simultaneously connected to the second interface, the first end of the in-vehicle condenser and the first end of the wind-heating PTC; the second end of the in-vehicle condenser and the second end of the wind-heating PTC are both connected to the third interface; the first end and the second end of the evaporator are respectively connected to the fourth interface and the fifth interface; the first end and the second end of the out-of-vehicle condenser are respectively connected to the sixth interface and the seventh interface; the first end and the second end of the plate heat exchanger are respectively connected to the eighth interface and the ninth interface; the first end and the second end of the power battery direct cooling and direct heating plate are respectively connected to the tenth interface and the eleventh interface.

10. The thermal management system according to claim 9, characterized in that: A first flow path is provided between the third interface and the eighth interface; a second flow path is provided between the third interface and the sixth interface; a third flow path is provided between the second interface and the tenth interface; a fourth flow path is provided between the tenth interface and the first interface; a fifth flow path is provided between the fourth interface and the first interface; a sixth flow path is provided between the ninth interface and the first interface; a seventh flow path is provided between the ninth interface and the eleventh interface; an eighth flow path is provided between the seventh interface and the eleventh interface; a ninth flow path is provided between the seventh interface and the fifth interface; and a tenth flow path is provided between the eleventh interface and the eighth interface.

11. The thermal management system according to claim 10, characterized in that: The air conditioning and heating circuit includes the first flow path and the sixth flow path; the battery heating circuit includes the third flow path, the tenth flow path and the sixth flow path; the air conditioning, heating and battery heating circuit includes the first flow path, the third flow path, the tenth flow path and the sixth flow path, wherein the first flow path is located on a branch, the third flow path and the tenth flow path are located on another parallel branch, and the sixth flow path is located on the main circuit.

12. The thermal management system according to claim 10, characterized in that: The battery cooling circuit includes the second flow path, the eighth flow path and the fourth flow path; the battery cooling and air-conditioning refrigeration circuit includes the second flow path, the eighth flow path, the fourth flow path, the ninth flow path and the fifth flow path, the second flow path is located on the main circuit, the eighth flow path and the fourth flow path are located on a branch, and the ninth flow path and the fifth flow path are located on another parallel branch; the air-conditioning heating and battery cooling circuit includes the first flow path, the seventh flow path and the fourth flow path.

13. The thermal management system according to claim 10, characterized in that: The second flow regulating device includes a first flow regulating hole and a second flow regulating hole; the electronic expansion valve can control the flow of the tenth flow path and the eighth flow path; the first flow regulating hole can control the flow of the ninth flow path, and the second flow regulating hole can control the flow of the first flow path.

14. The thermal management system according to claim 10, characterized in that: The fourth flow path is provided with a first one-way valve; the fifth flow path is provided with a second one-way valve; the eighth flow path partially overlaps with the ninth flow path, a third one-way valve is provided on the overlapping portion, and the eighth flow path is also provided with a fourth one-way valve; the tenth flow path is provided with a fifth one-way valve.

15. A vehicle, characterized in that: Comprising a thermal management system as claimed in any one of claims 1 to 14.

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