Thermal management system based on twelve-way valve

Abstract

The invention provides a thermal management system based on a twelve-way valve, which belongs to the technical field of thermal management systems and comprises a battery branch, a heat dissipation branch, an air conditioner loop, a heating branch, a straight-through branch and an electric drive branch which are respectively communicated through the twelve-way valve. A specific communication mode is arranged in the twelve-way valve, so that different branches are sequentially communicated to form a closed loop. In the using process, only the valve element of the twelve-way valve needs to be rotated, the communication mode of all the ends of the twelve-way valve is adjusted, the communication relation of all the branches is adjusted, and finally multiple functions of the heat management system are achieved. In this way, due to the fact that the number of the water valves can be reduced, the cost for manufacturing a plurality of water valves is reduced, and the overall weight of the system is reduced. As the state switching can be realized only by rotating the twelve-way valve, the complexity of operation is reduced.

Description

Technical Field

[0001] The present invention generally relates to the technical field of thermal management systems, and in particular to a thermal management system based on a twelve-way valve. Background Art

[0002] The energy consumption of electric vehicles directly affects the vehicle's range. Among them, the vehicle's thermal management system has a huge impact on the vehicle's energy consumption. For example, passenger compartment heating and power battery heating at low temperatures will consume more power batteries and reduce vehicle range.

[0003] In order to reduce the energy consumption of the thermal management system, most electric vehicles currently use an integrated thermal management system with a heat pump system. Compared with the traditional passenger compartment electric heating solution, the heat pump system can reduce the energy consumption of passenger compartment heating. The integrated solution integrates the vehicle's electric drive cooling system, power battery temperature control system (including heating system and cooling system), and air conditioning system (including refrigeration and heating system), which can connect the systems to achieve the flow of heat between systems. For example, the heat generated by the electric drive system (drive motor, motor controller) during operation is recovered for passenger compartment heating and power battery pack heating. A water cooling system is usually used to connect the systems, and the heat transfer between them is achieved through the flow of refrigerant liquid.

[0004] In engineering, water valves are used to switch the flow pattern of the refrigerant liquid. The current system has the following problems: In order to realize complex water cooling branch switching, it is usually necessary to design a complex water valve system. The current system usually includes multiple water valves, which are complex, costly and heavy. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a thermal management system based on a twelve-way valve.

[0006] The present invention provides a thermal management system based on a twelve-way valve, wherein a refrigerant liquid flows inside the thermal management system, including: a twelve-way valve having a first end, a second end, a third end, a fourth end, a fifth end, a sixth end, a seventh end, an eighth end, a ninth end, a tenth end, an eleventh end, and a twelfth end; a battery branch, the battery branch being connected to the first end and the eighth second end; an electric drive branch, the electric drive branch being connected to the sixth end and the eleventh end; a straight-through branch, the straight-through branch connecting the third end and the twelfth end; a heating branch, the heating branch being in communication with the fourth end and the seventh end and being used for heating the refrigerant liquid; a heat dissipation branch, the heat dissipation branch being in communication with the second end and the fifth end and being used for dissipating heat from the refrigerant liquid; an air conditioning circuit, the air conditioning circuit being in communication with the ninth end and the tenth end; The twelve-way valve is used to perform heat exchange for the battery branch, electric drive branch, heating branch, heat dissipation branch and air conditioning circuit through the refrigerant liquid.

[0007] According to the technical solution provided by the present invention, the twelve-way valve has a second state; In the second state, The first end is in communication with the second end; The third end is connected to the twelfth end; The fourth end is connected to the eleventh end; The fifth end is connected to the eighth end; The sixth end is connected to the seventh end; The ninth end is connected to the tenth end; The battery branch and the heat dissipation branch are connected to form a closed loop; the heat dissipation branch dissipates heat for the battery branch through the refrigerant liquid; The electric drive branch is connected to the heating branch to form a closed loop; the heating branch stores heat for the electric drive branch through the refrigerant liquid.

[0008] According to the technical solution provided by the present invention, the twelve-way valve has a third state; When in the third state, The first end is in communication with the twelfth end; The second end is connected to the eleventh end; The third end is connected to the tenth end; The fourth end is connected to the seventh end; The fifth end is connected to the sixth end; The eighth end is connected to the ninth end; The battery branch and the through branch are sequentially connected to the air conditioning circuit, and the air conditioning circuit cools the battery branch through the refrigerant liquid; The electric drive branch is connected to the heat dissipation branch to form a closed loop, and the heat dissipation branch dissipates heat for the electric drive branch through the refrigerant liquid.

[0009] According to the technical solution provided by the present invention, the twelve-way valve has a fifth state; When in the fifth state, The first end is in communication with the eighth end; The second end is in communication with the fifth end; The third end is connected to the fourth end; The sixth end is connected to the seventh end; The ninth end is connected to the twelfth end; The tenth end is connected to the eleventh end; The battery branch forms a closed loop for maintaining the current temperature of the battery branch; The electric drive branch, the air conditioning circuit, the direct branch and the heating branch are connected; When the electric drive branch and the air conditioning circuit are working and the heating branch is not working, the heat of the electric drive branch is transferred to the air conditioning circuit through the refrigerant liquid to heat the air conditioning circuit and cool the electric drive branch; When the heating branch is working, the refrigerant liquid is used to heat the air conditioning circuit and the electric drive branch; When the electric drive branch is working and the air conditioning circuit and the heating branch are not working, the refrigerant liquid circulates to store heat for the electric drive branch.

[0010] According to the technical solution provided by the present invention, the twelve-way valve has a sixth state; When in the sixth state, The first end is in communication with the fourth end; The second end is in communication with the third end; The fifth end is connected to the sixth end; The seventh end is connected to the twelfth end; The eighth end is connected to the eleventh end; The ninth end is connected to the tenth end; The battery branch, the heating branch, the through branch, the heat dissipation branch and the electric drive branch are connected in sequence to form a closed loop; When the heating branch is working and the heat dissipation branch is not working, the battery branch and the electric drive branch are heated simultaneously by the refrigerant liquid; When the heating branch is not working and the heat dissipation branch is working, the refrigerant liquid is used to dissipate heat for the battery branch and the electric drive branch at the same time.

[0011] According to the technical solution provided by the present invention, the twelve-way valve has a seventh state; When in the seventh state, The first end is in communication with the second end; The third end is connected to the twelfth end; The fourth end is connected to the fifth end; The sixth end is connected to the eleventh end; The seventh end is connected to the tenth end; The eighth end is connected to the ninth end; The electric drive branch forms a closed loop, and the refrigerant liquid circulates to store heat for the electric drive branch; The battery branch, the heat dissipation branch, the heating branch and the air conditioning circuit are connected in sequence to form a closed circuit; When the heat dissipation branch is working, the refrigerant liquid is used to dissipate heat for the battery branch; When the heating branch is working, the battery branch is heated by the refrigerant liquid; When the air conditioning circuit is working, the battery branch is cooled and cooled by the refrigerant liquid.

[0012] According to the technical solution provided by the present invention, the twelve-way valve has an eighth state; When in the eighth state, The first end is in communication with the twelfth end; The second end is connected to the eleventh end; The third end is connected to the fourth end; The fifth end is connected to the tenth end; The sixth end is connected to the ninth end; The seventh end is connected to the eighth end; The battery branch, the through branch and the heating branch are connected in sequence to form a closed loop; the heating branch heats the battery branch through the refrigerant liquid; The electric drive branch, the heat dissipation branch and the air conditioning circuit are connected in sequence to form a closed circuit; The heat dissipation branch dissipates heat for the electric drive branch through the refrigerant liquid; The refrigerant liquid is used to absorb heat from the electric drive branch and the surrounding environment, and transfer the heat of the electric drive branch to the air-conditioning circuit, so as to heat the air-conditioning circuit and cool the electric drive branch.

[0013] According to the technical solution provided by the present invention, the twelve-way valve has a tenth state; When in the tenth state, The first end is in communication with the second end; The third end is connected to the eighth end; The fourth end is connected to the seventh end; The fifth end is connected to the sixth end; The ninth end is connected to the twelfth end; The tenth end is connected to the eleventh end; The battery branch, the heat dissipation branch, the electric drive branch, the air conditioning circuit and the direct-through branch are connected in sequence to form a closed circuit; The refrigerant liquid absorbs heat from the battery branch, the electric drive branch and the surrounding environment, and transfers it to the heat dissipation branch and the air-conditioning circuit to heat the air-conditioning circuit.

[0014] According to the technical solution provided by the present invention, the twelve-way valve has an eleventh state; When in the eleventh state, The first end is in communication with the twelfth end; The second end is in communication with the seventh end; The third end is connected to the sixth end; The fourth end is connected to the fifth end; The eighth end is connected to the eleventh end; The ninth end is connected to the tenth end; The battery branch, the through branch and the electric drive branch are connected in sequence to form a closed loop; the refrigerant liquid circulates between the battery branch and the electric drive branch to absorb the heat of the electric drive branch and transfer it to the battery branch to heat the battery branch.

[0015] According to the technical solution provided by the present invention, the twelve-way valve has a twelfth state; When in the twelfth state, The first end is in communication with the sixth end; The second end is in communication with the fifth end; The third end is connected to the fourth end; The seventh end is connected to the tenth end; The eighth end is connected to the ninth end; The eleventh end is connected to the twelfth end; The battery branch, electric drive branch, direct branch, heating branch and air conditioning circuit are connected in sequence to form a closed circuit; When the heating branch and the air-conditioning circuit are not working, the refrigerant liquid absorbs the waste heat in the battery branch and transfers it to the electric drive branch to heat the battery branch.

[0016] The beneficial effects of the present invention are: The twelve-way valve is used to connect the battery branch, heat dissipation branch, air conditioning circuit, heating branch, straight branch and electric drive branch respectively. The twelve-way valve has a specific connection method inside, so that different branches are connected in sequence to form a closed loop. During use, it is only necessary to rotate the valve core of the twelve-way valve and adjust the connection method of each end of the twelve-way valve to adjust the connection relationship of each branch, and finally realize the multiple functions of the thermal management system. This method can reduce the number of water valves, thereby reducing the cost of preparing multiple water valves and reducing the overall weight of the system. Since the switching state can be achieved by simply rotating the twelve-way valve, the complexity of the operation is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the first state; Figure 2 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the second state; Figure 3 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the third state; Figure 4 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the fourth state; Figure 5 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the fifth state; Figure 6 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the sixth state; Figure 7 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the seventh state; Figure 8 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the eighth state; Fig. 9 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the ninth state; Fig.10 It is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the tenth state; Fig.11 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the eleventh state; Fig.12 is a schematic diagram of the connection mode of the thermal management system when the twelve-way valve is in the twelfth state; Fig.13 It is a structural schematic diagram of a twelve-way valve; Among them: 1. Battery branch; 2. Electric drive branch; 3. Direct branch; 4. Heating branch; 5. Cooling branch; 6. Air conditioning circuit; 7. Battery water jacket; 8. Battery water pump; 9. Electric drive water jacket; 10. Electric drive water pump; 11. PTC; 12. Twelve-way valve; 13. Radiator; 14. Fan; 15. Cooler; 16. Evaporator; 17. Electronic expansion valve; 18. Internal condenser; 19. External condenser; 20. Solenoid valve; 21. Compressor; 22. Gas-liquid separator. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] Please refer to Fig.13 The present invention provides a thermal management system based on a twelve-way valve, wherein a refrigerant liquid is circulated, and the refrigerant liquid is water, comprising: A twelve-way valve 12, the twelve-way valve 12 having a first end 001, a second end 002, a third end 003, a fourth end 004, a fifth end 005, a sixth end 006, a seventh end 007, an eighth end 008, a ninth end 009, a tenth end 010, an eleventh end 011 and a twelfth end 012; A battery branch 1, the battery branch 1 is connected to the first end 001 and the eighth second end 008; the battery branch 1 comprises: a battery water jacket 7 and a battery water pump 8; the water jacket is a shell structure arranged outside the device, and has a chamber for circulating refrigerant liquid inside, which can be used to exchange heat for the battery device; The electric drive branch 2 is connected to the sixth end 006 and the eleventh end 011; the electric drive branch 2 includes: an electric drive water jacket 9 and an electric drive water pump 10; all water pumps are used to drive the flow of refrigerant liquid; A straight-through branch 3, the straight-through branch 3 connecting the third end 003 and the twelfth end 012; A heating branch 4, the heating branch 4 is connected to the fourth end 004 and the seventh end 007, and is used to heat the refrigerant liquid; the heating branch 4 includes a PTC 11, which is used to heat the refrigerant liquid; The heat dissipation branch 5 is connected with the second end 002 and the fifth end 005, and is used to dissipate heat from the refrigerant liquid; the heat dissipation branch 5 includes: a radiator 13; An air conditioning loop 6, the air conditioning loop 6 being in communication with the ninth terminal 009 and the tenth terminal 010; The air conditioning circuit 6 comprises: a first branch, a second branch and a third branch connected in series; The first branch includes a cooler 15 and an evaporator 16 connected in parallel; the cooler 15 and the evaporator 16 are each connected in series with an electronic expansion valve 17; Wherein, the cooler 15 is connected to the ninth end 009 and the tenth end 010 respectively; The second branch includes: an internal condenser 18 and an external condenser 19 connected in parallel; the internal condenser 18 and the external condenser 19 are each connected in series with a solenoid valve 20; the evaporator 16 and the external condenser 19 are also each equipped with a fan 14 for heat dissipation; The third branch includes: a compressor 21 and a gas-liquid separator 22 connected in series; The twelve-way valve 12 is used to perform heat exchange for the battery branch 1, the electric drive branch 2, the heating branch 4, the heat dissipation branch 5 and the air conditioning circuit 6 through the refrigerant liquid.

[0021] The twelve-way valve 12 provided by the present invention has twelve states, and the connection mode of each end is different in each state. During use, it is only necessary to rotate the valve core of the twelve-way valve to adjust the connection mode of each end of the twelve-way valve to adjust the connection relationship of each branch, and finally realize the multiple functions of the thermal management system. In this way, since the number of water valves can be reduced, the cost of preparing multiple water valves is reduced and the overall weight of the system is reduced. Since the switching state can be achieved by rotating the twelve-way valve, the complexity of the operation is reduced.

[0022] Specifically, the twelve states of the twelve-way valve 12 and the corresponding working states are as follows: Further, refer to Figure 1 , the twelve-way valve 12 has a first state; In the first state, The first end 001 is connected to the fourth end 004; The second end 002 is connected to the third end 003; The fifth end 005 is connected to the twelfth end 012; The sixth end 006 is connected to the ninth end 009; The seventh end 007 is connected to the eighth end 008; The tenth end 010 is connected to the eleventh end 011; The battery branch 1 and the heating branch 4 form a closed loop; the electric drive branch 2 and the air conditioning loop 6 form a closed loop; the direct branch 3 and the heat dissipation branch 5 form a closed loop.

[0023] In the first state of connection, there is no working state suitable for each branch, so the first state is generally not selected during operation. When the entire thermal management system is not working, it can be switched to the first state.

[0024] Further, refer to Figure 2 , the twelve-way valve 12 has a second state; In the second state, The first end 001 is connected to the second end 002; The third end 003 is connected to the twelfth end 012; The fourth end 004 is connected to the eleventh end 011; The fifth end 005 is connected to the eighth end 008; The sixth end 006 is connected to the seventh end 007; The ninth end 009 is connected to the tenth end 010; When it is necessary to dissipate heat for the battery branch 1 and store heat for the electric drive branch 2, the second state is selected: The direct branch 3 forms a closed loop by itself; the cooler in the air conditioning loop 6 is not connected to the other ends of the twelve-way valve; The battery branch 1 and the heat dissipation branch 5 are connected to form a closed loop; the heat dissipation branch 5 dissipates heat for the battery branch 1 through the refrigerant liquid; the refrigerant liquid absorbs the heat of the battery branch 1, and when it circulates to the heat dissipation branch 5, transfers the heat to the radiator 13 and evaporates into the surrounding environment; In this connection mode, the battery branch 1 and the heat dissipation branch 5 are directly connected without passing through other branches, so the flow resistance is small, the flow rate of the refrigerant liquid can be increased, and the heat exchange efficiency can be improved.

[0025] The electric drive branch 2 is connected to the heating branch 4 to form a closed loop; the heating branch 4 stores heat for the electric drive branch 2 through the refrigerant liquid.

[0026] Further, refer to Figure 3 , the twelve-way valve 12 has a third state; When in the third state, The first end 001 is connected to the twelfth end 012; The second end 002 is connected to the eleventh end 011; The third end 003 is connected to the tenth end 010; The fourth end 004 is connected to the seventh end 007; The fifth end 005 is connected to the sixth end 006; The eighth end 008 is connected to the ninth end 009; When it is necessary to cool the battery branch 1 and dissipate heat for the electric drive branch 2, the third state is selected: The battery branch 1 and the through branch 3 are connected to the air conditioning circuit 6 in sequence, and the air conditioning circuit 6 cools the battery branch 1 through the refrigerant liquid; The electric drive branch 2 is connected to the heat dissipation branch 5 to form a closed loop, and the heat dissipation branch 5 dissipates heat for the electric drive branch 2 through the refrigerant liquid.

[0027] When the suitable operating temperatures of the battery and the electric drive are different, this method can ensure that the battery and the electric drive are within their respective operating temperature ranges and do not affect each other.

[0028] Further, refer to Figure 4 , the twelve-way valve 12 has a fourth state; In the fourth state, The first end 001 is connected to the tenth end 010; The second end 002 is connected to the ninth end 009; The third end 003 is connected to the sixth end 006; The fourth end 004 is connected to the fifth end 005; The seventh end 007 is connected to the eighth end 008; The eleventh end 011 is connected to the twelfth end 012; The battery branch 1, the air conditioning circuit 6, the heat dissipation branch 5 and the heating branch 4 are connected in sequence to form a closed loop. Since the fourth state has the same function as the seventh state, the fourth state is generally not selected.

[0029] Further, refer to Figure 5 , the twelve-way valve 12 has a fifth state; When in the fifth state, The first end 001 is connected to the eighth end 008; The second end 002 is connected to the fifth end 005; The third end 003 is connected to the fourth end 004; The sixth end 006 is connected to the seventh end 007; The ninth end 009 is connected to the twelfth end 012; The tenth end 010 is connected to the eleventh end 011; When only the temperature of the electric drive branch 2 needs to be adjusted, the fifth state is selected: The battery branch 1 forms a closed loop, which is used to keep the battery branch 1 at a current temperature; The electric drive branch 2, the air conditioning circuit 6, the direct branch 3 and the heating branch 4 are connected; When the electric drive branch 2 and the air conditioning circuit 6 are working, and the heating branch 4 is not working, the heat of the electric drive branch 2 is transferred to the air conditioning circuit 6 through the refrigerant liquid, so as to heat the air conditioning circuit 6 and cool the electric drive branch 2; When the heating branch 4 is working, the refrigerant liquid is used to heat the air conditioning circuit 6 and the electric drive branch 2; When the electric drive branch 2 is working and the air conditioning circuit 6 and the heating branch 4 are not working, the refrigerant liquid circulates to store heat for the electric drive branch 2 .

[0030] The above method realizes the regulation of the electric drive temperature and avoids affecting the temperature of the battery.

[0031] Further, refer to Figure 6 , the twelve-way valve 12 has a sixth state; When in the sixth state, The first end 001 is connected to the fourth end 004; The second end 002 is connected to the third end 003; The fifth end 005 is connected to the sixth end 006; The seventh end 007 is connected to the twelfth end 012; The eighth end 008 is connected to the eleventh end 011; The ninth end 009 is connected to the tenth end 010; When it is necessary to dissipate heat or heat the battery branch 1 and the electric drive branch 2 at the same time, the sixth state is selected: The battery branch 1, the heating branch 4, the through branch 3, the heat dissipation branch 5 and the electric drive branch 2 are connected in sequence to form a closed loop; When the heating branch 4 is working and the heat dissipation branch 5 is not working, the battery branch 1 and the electric drive branch 2 are heated simultaneously by the refrigerant liquid; When the heating branch 4 is not working and the heat dissipation branch 5 is working, the refrigerant liquid is used to dissipate heat for the battery branch 1 and the electric drive branch 2 at the same time.

[0032] The above method realizes the function of cooling or heating the battery and the electric drive at the same time.

[0033] Further, refer to Figure 7 , the twelve-way valve 12 has a seventh state; When in the seventh state, The first end 001 is connected to the second end 002; The third end 003 is connected to the twelfth end 012; The fourth end 004 is connected to the fifth end 005; The sixth end 006 is connected to the eleventh end 011; The seventh end 007 is connected to the tenth end 010; The eighth end 008 is connected to the ninth end 009; When the temperature of the battery branch 1 needs to be adjusted, the seventh state is selected: The electric drive branch 2 forms a closed loop, and the refrigerant liquid circulates to store heat for the electric drive branch 2; The battery branch 1, the heat dissipation branch 5, the heating branch 4 and the air conditioning circuit 6 are connected in sequence to form a closed circuit; When the heat dissipation branch 5 is working, the refrigerant liquid is used to dissipate heat for the battery branch 1; When the heating branch 4 is working, the battery branch 1 is heated by the refrigerant liquid; When the air conditioning circuit 6 is working, the battery branch 1 is cooled and cooled by the refrigerant liquid.

[0034] The PTC 11 of the heating branch 4 does not work simultaneously with the radiator 13 of the heat dissipation branch 5 and the cooler 15 of the air conditioning circuit 6. This method can adjust the battery temperature and avoid affecting the temperature of the electric drive.

[0035] Further, refer to Figure 8 , the twelve-way valve 12 has an eighth state; When in the eighth state, The first end 001 is connected to the twelfth end 012; The second end 002 is connected to the eleventh end 011; The third end 003 is connected to the fourth end 004; The fifth end 005 is connected to the tenth end 010; The sixth end 006 is connected to the ninth end 009; The seventh end 007 is connected to the eighth end 008; When the battery branch 1 needs to be heated and the electric drive branch 2 needs to be cooled or regulated, the eighth state is selected: The battery branch 1, the through branch 3 and the heating branch 4 are connected in sequence to form a closed loop; the heating branch 4 heats the battery branch 1 by heating the refrigerant liquid; The electric drive branch 2, the heat dissipation branch 5 and the air conditioning circuit 6 are connected in sequence to form a closed circuit; the heat dissipation branch 5 dissipates heat for the electric drive branch 2 through the refrigerant liquid; The refrigerant liquid is used to absorb heat from the electric drive branch 2 and the surrounding environment, and transfer the heat of the electric drive branch 2 to the air-conditioning circuit 6, so as to heat the air-conditioning circuit 6 and cool the electric drive branch 2.

[0036] Specifically, when the temperature of the electric drive branch 2 is too high, the radiator 13 and the fan 14 are started, and the cooler 15 of the air-conditioning loop 6 is started.

[0037] At this time, after the refrigerant liquid absorbs the heat of the electric drive branch 2, the temperature of the refrigerant liquid increases. When passing through the heat dissipation branch 5, the heat is dissipated into the surrounding environment, and the temperature of the refrigerant liquid decreases. Then, when passing through the cooler 15 of the air-conditioning loop 6, the temperature of the refrigerant liquid is further reduced due to the cooling effect of the cooler 15. Finally, when it circulates to the electric drive branch 2, it can absorb more heat and improve the cooling effect.

[0038] This cooling method of first dissipating heat and then cooling allows the cooler 15 to use lower power to achieve the cooling effect while ensuring the cooling efficiency; since power is proportional to energy consumption, energy consumption is reduced.

[0039] Further, refer to Fig. 9 , the twelve-way valve 12 has a ninth state; When in the ninth state, The first end 001 is connected to the tenth end 010; The second end 002 is connected to the third end 003; The fourth end 004 is connected to the ninth end 009; The fifth end 005 is connected to the eighth end 008; The sixth end 006 is connected to the seventh end 007; The eleventh end 011 is connected to the twelfth end 012; When it is necessary to add refrigerant liquid into the pipeline of the entire thermal management system, select the ninth state: The battery branch 1, air conditioning loop 6, heating branch 4, electric drive branch 2, direct branch 3 and heat dissipation branch 5 are connected in sequence to form a closed loop, and the injected refrigerant liquid can fill all branches or loops.

[0040] Further, refer to Fig.10 , the twelve-way valve 12 has a tenth state; When in the tenth state, The first end 001 is connected to the second end 002; The third end 003 is connected to the eighth end 008; The fourth end 004 is connected to the seventh end 007; The fifth end 005 is connected to the sixth end 006; The ninth end 009 is connected to the twelfth end 012; The tenth end 010 is connected to the eleventh end 011; When it is necessary to recycle the heat of the battery branch 1 and the electric drive branch 2, select the tenth state: The battery branch 1, the heat dissipation branch 5, the electric drive branch 2, the air conditioning circuit 6 and the direct branch 3 are connected in sequence to form a closed circuit; The refrigerant liquid absorbs heat from the battery branch 1, the electric drive branch 2 and the surrounding environment, and is transferred to the heat dissipation branch 5 and the air-conditioning circuit 6 through circulation, so as to heat the air-conditioning circuit 6, so that the recovered heat is blown into the passenger compartment from the air conditioner, thereby reducing the heat dissipated randomly into the surrounding space and improving the utilization rate of energy.

[0041] Further, refer to Fig.11 , the twelve-way valve 12 has an eleventh state; When in the eleventh state, The first end 001 is connected to the twelfth end 012; The second end 002 is connected to the seventh end 007; The third end 003 is connected to the sixth end 006; The fourth end 004 is connected to the fifth end 005; The eighth end 008 is connected to the eleventh end 011; The ninth end 009 is connected to the tenth end 010; When it is necessary to recover the heat of the electric drive branch 2, the eleventh state is selected: The battery branch 1, the through branch 3 and the electric drive branch 2 are connected in sequence to form a closed loop; the refrigerant liquid circulates between the battery branch 1 and the electric drive branch 2 to absorb the heat of the electric drive branch 2 and transfer it to the battery branch 1 to heat the battery branch 1.

[0042] This method does not need to start PTC11 heating, thus reducing energy consumption and improving the endurance of electric vehicles.

[0043] The refrigerant liquid flows through the electric drive branch 2 to absorb heat first, and then releases heat through the battery branch 1. There is no other pipeline connection before, which can ensure that the absorbed heat is dissipated into the surrounding environment as little as possible.

[0044] The two branches are directly connected, with a small flow resistance, which can increase the flow rate of the refrigerant liquid and improve the heat exchange efficiency. Due to the improvement of the heat exchange efficiency, the refrigerant liquid can absorb more waste heat from the electric drive branch 2, which is beneficial to improve the energy utilization rate.

[0045] Further, refer to Fig.12 , the twelve-way valve 12 has a twelfth state; When in the twelfth state, The first end 001 is connected to the sixth end 006; The second end 002 is connected to the fifth end 005; The third end 003 is connected to the fourth end 004; The seventh end 007 is connected to the tenth end 010; The eighth end 008 is connected to the ninth end 009; The eleventh end 011 is connected to the twelfth end 012; When the heat of the battery branch 1 needs to be recovered, the twelfth state is selected: The battery branch 1, the electric drive branch 2, the direct branch 3, the heating branch 4 and the air conditioning circuit 6 are connected in sequence to form a closed circuit.

[0046] The specific principle is consistent with the eleventh state. When the heating branch 4 and the air conditioning circuit 6 are not working, the refrigerant liquid absorbs the residual heat in the battery branch 1 and transfers it to the electric drive branch 2 to heat the battery branch 1 .

[0047] The refrigerant liquid flows through the battery branch 1 to absorb heat first, and then releases heat through the electric drive branch 2 to achieve heat recovery.

[0048] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A thermal management system based on a twelve-way valve, with refrigerant liquid flowing inside, characterized in that: include: A twelve-way valve (12), the twelve-way valve (12) having a first end (001), a second end (002), a third end (003), a fourth end (004), a fifth end (005), a sixth end (006), a seventh end (007), an eighth end (008), a ninth end (009), a tenth end (010), an eleventh end (011) and a twelfth end (012); A battery branch (1), the battery branch (1) being connected to the first end (001) and the eighth second end (008); An electric drive branch (2), the electric drive branch (2) being in communication with the sixth end (006) and the eleventh end (011); A straight-through branch (3), the straight-through branch (3) connecting the third end (003) and the twelfth end (012); a heating branch (4), the heating branch (4) being in communication with the fourth end (004) and the seventh end (007) and being used for heating the refrigerant liquid; a heat dissipation branch (5), the heat dissipation branch (5) being in communication with the second end (002) and the fifth end (005) and being used for dissipating heat from the refrigerant liquid; An air conditioning circuit (6), the air conditioning circuit (6) being in communication with the ninth end (009) and the tenth end (010); The twelve-way valve (12) is used to perform heat exchange for the battery branch (1), the electric drive branch (2), the heating branch (4), the heat dissipation branch (5) and the air conditioning circuit (6) through the refrigerant liquid.

2. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has a second state; In the second state, The first end (001) is in communication with the second end (002); The third end (003) is connected to the twelfth end (012); The fourth end (004) is connected to the eleventh end (011); The fifth end (005) is connected to the eighth end (008); The sixth end (006) is connected to the seventh end (007); The ninth end (009) is connected to the tenth end (010); The battery branch (1) and the heat dissipation branch (5) are connected to form a closed loop; the heat dissipation branch (5) dissipates heat for the battery branch (1) through the refrigerant liquid; The electric drive branch (2) is connected to the heating branch (4) to form a closed loop; the heating branch (4) stores heat for the electric drive branch (2) through the refrigerant liquid.

3. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has a third state; When in the third state, The first end (001) is connected to the twelfth end (012); The second end (002) is connected to the eleventh end (011); The third end (003) is in communication with the tenth end (010); The fourth end (004) is connected to the seventh end (007); The fifth end (005) is connected to the sixth end (006); The eighth end (008) is connected to the ninth end (009); The battery branch (1), the through branch (3) and the air conditioning circuit (6) are connected in sequence, and the air conditioning circuit (6) cools the battery branch (1) through the refrigerant liquid; The electric drive branch (2) is connected to the heat dissipation branch (5) to form a closed loop, and the heat dissipation branch (5) dissipates heat for the electric drive branch (2) through the refrigerant liquid.

4. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has a fifth state; When in the fifth state, The first end (001) is in communication with the eighth end (008); The second end (002) is in communication with the fifth end (005); The third end (003) is connected to the fourth end (004); The sixth end (006) is connected to the seventh end (007); The ninth end (009) is connected to the twelfth end (012); The tenth end (010) is connected to the eleventh end (011); The battery branch (1) forms a closed loop, which is used to keep the battery branch (1) at a current temperature; The electric drive branch (2), the air conditioning circuit (6), the direct branch (3) and the heating branch (4) are connected; When the electric drive branch (2) and the air conditioning circuit (6) are in operation and the heating branch (4) is not in operation, the heat of the electric drive branch (2) is transferred to the air conditioning circuit (6) through the refrigerant liquid, so as to heat the air conditioning circuit (6) and cool the electric drive branch (2); When the heating branch (4) is in operation, the refrigerant liquid is used to heat the air conditioning circuit (6) and the electric drive branch (2); When the electric drive branch (2) is in operation and the air conditioning circuit (6) and the heating branch (4) are not in operation, the refrigerant liquid circulates to store heat for the electric drive branch (2).

5. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has a sixth state; When in the sixth state, The first end (001) is in communication with the fourth end (004); The second end (002) is in communication with the third end (003); The fifth end (005) is connected to the sixth end (006); The seventh end (007) is connected to the twelfth end (012); The eighth end (008) is connected to the eleventh end (011); The ninth end (009) is connected to the tenth end (010); The battery branch (1), the heating branch (4), the direct branch (3), the heat dissipation branch (5) and the electric drive branch (2) are connected in sequence to form a closed loop; When the heating branch (4) is in operation and the heat dissipation branch (5) is not in operation, the battery branch (1) and the electric drive branch (2) are heated simultaneously by the refrigerant liquid; When the heating branch (4) is not working and the heat dissipation branch (5) is working, the refrigerant liquid is used to dissipate heat for the battery branch (1) and the electric drive branch (2) at the same time.

6. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has a seventh state; When in the seventh state, The first end (001) is in communication with the second end (002); The third end (003) is connected to the twelfth end (012); The fourth end (004) is connected to the fifth end (005); The sixth end (006) is connected to the eleventh end (011); The seventh end (007) is connected to the tenth end (010); The eighth end (008) is connected to the ninth end (009); The electric drive branch (2) forms a closed loop, and the refrigerant liquid circulates to store heat for the electric drive branch (2); The battery branch (1), the heat dissipation branch (5), the heating branch (4) and the air conditioning circuit (6) are connected in sequence to form a closed circuit; When the heat dissipation branch (5) is in operation, the refrigerant liquid is used to dissipate heat for the battery branch (1); When the heating branch (4) is in operation, the battery branch (1) is heated by the refrigerant liquid; When the air conditioning circuit (6) is in operation, the battery branch circuit (1) is cooled and cooled by the refrigerant liquid.

7. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has an eighth state; When in the eighth state, The first end (001) is connected to the twelfth end (012); The second end (002) is connected to the eleventh end (011); The third end (003) is connected to the fourth end (004); The fifth end (005) is connected to the tenth end (010); The sixth end (006) is connected to the ninth end (009); The seventh end (007) is connected to the eighth end (008); The battery branch (1), the through branch (3) and the heating branch (4) are connected in sequence to form a closed loop; the heating branch (4) heats the battery branch (1) through the refrigerant liquid; The electric drive branch (2), the heat dissipation branch (5) and the air conditioning circuit (6) are connected in sequence to form a closed circuit; The heat dissipation branch (5) dissipates heat for the electric drive branch (2) through the refrigerant liquid; The refrigerant liquid is used to absorb heat from the electric drive branch (2) and the surrounding environment, and transfer the heat of the electric drive branch (2) to the air conditioning circuit (6), so as to heat the air conditioning circuit (6) and cool the electric drive branch (2).

8. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has a tenth state; When in the tenth state, The first end (001) is in communication with the second end (002); The third end (003) is connected to the eighth end (008); The fourth end (004) is connected to the seventh end (007); The fifth end (005) is connected to the sixth end (006); The ninth end (009) is connected to the twelfth end (012); The tenth end (010) is connected to the eleventh end (011); The battery branch (1), the heat dissipation branch (5), the electric drive branch (2), the air conditioning circuit (6) and the direct-through branch (3) are connected in sequence to form a closed circuit; The refrigerant liquid absorbs heat from the battery branch (1), the electric drive branch (2) and the surrounding environment, and transfers the heat to the heat dissipation branch (5) and the air conditioning circuit (6), so as to heat the air conditioning circuit (6).

9. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has an eleventh state; When in the eleventh state, The first end (001) is connected to the twelfth end (012); The second end (002) is in communication with the seventh end (007); The third end (003) is in communication with the sixth end (006); The fourth end (004) is connected to the fifth end (005); The eighth end (008) is connected to the eleventh end (011); The ninth end (009) is connected to the tenth end (010); The battery branch (1), the through branch (3) and the electric drive branch (2) are connected in sequence to form a closed loop; the refrigerant liquid circulates between the battery branch (1) and the electric drive branch (2) to absorb heat from the electric drive branch (2) and transfer it to the battery branch (1) to heat the battery branch (1).

10. The thermal management system based on the twelve-way valve according to claim 1, characterized in that: The twelve-way valve (12) has a twelfth state; When in the twelfth state, The first end (001) is in communication with the sixth end (006); The second end (002) is in communication with the fifth end (005); The third end (003) is connected to the fourth end (004); The seventh end (007) is connected to the tenth end (010); The eighth end (008) is connected to the ninth end (009); The eleventh end (011) is connected to the twelfth end (012); The battery branch (1), the electric drive branch (2), the direct branch (3), the heating branch (4) and the air conditioning circuit (6) are connected in sequence to form a closed circuit; When the heating branch (4) and the air conditioning circuit (6) are not in operation, the refrigerant liquid absorbs the residual heat in the battery branch (1) and transfers it to the electric drive branch (2) for heating the battery branch (1).

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