Thermal management system of automobile and automobile

Abstract

The present invention provides a thermal management system for an automobile and an automobile. The system includes a refrigerant circuit, a coolant circuit, a first air-conditioning box, and a second air-conditioning box. The refrigerant circuit is used to achieve the temperature requirements of the first air-conditioning box, and the coolant circuit is used to achieve the temperature requirements of the second air-conditioning box and the power battery of the automobile. In this solution, a heat exchange component is arranged in the coolant circuit to couple the circuit for achieving the cooling and heating of the second air-conditioning box with the circuit for achieving the cooling and heating of the power battery. The air-conditioning system is simplified from a three-evaporator system to a two-evaporator system, and there is no need to additionally arrange an evaporator, an expansion valve, and a piping system for the second air-conditioning box, thereby reducing the difficulty and cost of the whole vehicle layout. In addition, a heat exchange component is arranged in the second air-conditioning box, so that the structure of the second air-conditioning box is more compact, which facilitates the layout of the whole vehicle. The second air-conditioning box and the power battery share a heater, and there is no need to separately arrange heaters for the second air-conditioning box and the power battery, further reducing the cost of the whole vehicle layout.

Description

Technical Field

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

[0002] With the development of MPV and other 3-row 6-seat or 3-row 7-seat vehicles, the air-conditioning system is generally equipped with two front and rear air-conditioning boxes. The second air-conditioning box 4 also includes an independent evaporator and a heater core to meet the temperature requirements of cooling and heating. For cars with plug-in hybrid power systems and pure electric vehicles with 3 rows of seats, in addition to the front and rear air-conditioning boxes, they are also equipped with battery cooling and battery heating systems to meet the temperature requirements of the power battery. For 3-row new energy vehicles, its air-conditioning refrigeration system needs to be equipped with three evaporators (i.e., the front evaporator, the rear evaporator, and the battery cooler for cooling the battery) and three sets of expansion valves. In order to achieve the simultaneous or separate operation of the three evaporators, the expansion valve generally needs to use a thermal expansion valve with a switch or directly upgrade to an electronic expansion valve with a switch.

[0003] However, the matching of the three-evaporator system is complicated, and the air conditioning pipeline is complicated, which increases the cost of the whole vehicle. In addition, in order to achieve the heating of the rear air conditioning box, the rear air conditioning box also needs to add a heating system solution. Generally, an air-side electric heater or a warm air core combined with a water-side electric heater is used. That is, the rear air conditioning box needs to retain the heat exchanger for cooling and the heat exchanger for heating. This undoubtedly increases the difficulty and cost of the layout of the whole vehicle. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that new energy vehicles need to be equipped with two front and rear air-conditioning boxes, which makes the layout of the whole vehicle difficult and costly.

[0005] To solve the above problems, an embodiment of the present invention discloses a thermal management system for an automobile, comprising a refrigerant circuit, a coolant circuit, a first air-conditioning box, and a second air-conditioning box; wherein the refrigerant circuit is used to achieve the temperature requirement of the first air-conditioning box, and the refrigerant circuit comprises a compressor, a condenser, an evaporator, and a battery cooler; the compressor, the condenser, and the battery cooler are sequentially connected in series via a pipeline to form a first circuit; the compressor, the condenser, and the evaporator are sequentially connected in series via a pipeline to form a second circuit; the first circuit and the second circuit are connected in parallel to form a refrigerant circuit; the evaporator is arranged in the first air-conditioning box; the coolant circuit is used to achieve the temperature requirements of the second air-conditioning box and the power battery of the automobile, and the coolant circuit comprises a power battery, a battery cooler, a circuit conversion device, a heater, and a heat exchange component; the power battery, the battery cooler, the heater, and the heat exchange component are all connected to the circuit conversion device, and the circuit conversion device forms a series circuit or a parallel circuit with at least two of the power battery, the battery cooler, the heater, and the heat exchange component according to the temperature requirements of the second air-conditioning box and the power battery; and the heat exchange component is arranged in the second air-conditioning box to achieve the heating requirement or cooling requirement of the second air-conditioning box; and the coolant circuit and the refrigerant circuit share a battery cooler.

[0006] By adopting the above scheme, a heat exchange component capable of realizing both cold and hot functions is arranged in the coolant circuit, and the circuit realizing cooling and heating of the second air-conditioning box is coupled with the circuit realizing cooling and heating of the power battery. There is no need to respectively provide an evaporator and a battery cooler for the second air-conditioning box and the power battery. Thus, the air-conditioning system of the automobile is simplified from a three-evaporator system to a two-evaporator system, and there is no need to additionally provide an evaporator, an expansion valve, and an air-conditioning piping system for the second air-conditioning box, thereby reducing the difficulty and cost of the whole vehicle layout. Furthermore, a heat exchange component is arranged in the second air-conditioning box, and there is no need to provide a damper and other structures added for the current temperature change, so that the structure of the second air-conditioning box is more compact, further facilitating the layout of the whole vehicle. Furthermore, the second air-conditioning box and the power battery share a heater, and there is no need to provide heaters for the second air-conditioning box and the power battery respectively, further reducing the cost of the whole vehicle layout.

[0007] According to another specific embodiment of the present invention, in the thermal management system of a vehicle disclosed in the embodiment of the present invention, the refrigerant circuit also includes a throttling and pressure reduction component, and the throttling and pressure reduction component includes a first expansion valve and a second expansion valve; wherein the first expansion valve is arranged between the condenser and the evaporator, and is close to the evaporator; the second expansion valve is arranged between the condenser and the battery cooler, and is close to the battery cooler.

[0008] By adopting the above scheme, throttling and pressure reducing components are respectively set near the evaporator and the battery cooler. The throttling and pressure reducing components can limit the flow and pressure of the refrigerant so that the flow and pressure of the refrigerant can meet the requirements of the evaporator and the battery cooler respectively, avoiding the refrigerant with excessive flow and pressure flowing into the evaporator or the battery cooler, affecting the working state of the evaporator or the battery cooler. In addition, by controlling the first expansion valve and the second expansion valve to control the conduction state of the first circuit and the second circuit, there will be no delay, the control efficiency is higher, and the control process is simpler.

[0009] According to another specific embodiment of the present invention, in the thermal management system of the automobile disclosed in the embodiment of the present invention, the first air-conditioning box also includes a damper and a heater; and the heater of the first air-conditioning box is used to meet the heating demand of the first air-conditioning box, and the evaporator is used to meet the cooling demand of the first air-conditioning box.

[0010] By adopting the above solution, a heater and a damper are provided to meet the heating demand of the first air conditioning box, and the damper and its controller can make the temperature control more accurate.

[0011] According to another specific embodiment of the present invention, in the thermal management system of the automobile disclosed in the embodiment of the present invention, the coolant circuit also includes a cooling kettle, a first conveying component, and a second conveying component; the cooling kettle is arranged between the battery cooler and the first conveying component; the first conveying component is arranged between the cooling kettle and the circuit conversion device, so that the coolant flows from the cooling kettle to the circuit conversion device; the second conveying component is arranged between the circuit conversion device and the heater of the coolant circuit, so that the coolant flows from the circuit conversion device to the heater of the coolant circuit.

[0012] By adopting the above solution and providing the first conveying component and the second conveying component, the flow direction of the coolant can be accurately controlled.

[0013] According to another specific embodiment of the present invention, in the thermal management system of the automobile disclosed in the embodiment of the present invention, the circuit conversion device is a five-way reversing valve, and the five-way reversing valve includes a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port; and the first valve port is connected to the first delivery component to receive the coolant delivered by the cooling kettle; the second valve port is connected to the second delivery component to deliver the coolant to the heater of the coolant circuit; the third valve port is connected to the heat exchange component to receive the coolant delivered by the heat exchange component; the fourth valve port is connected to the power battery to deliver the coolant to the power battery; the fifth valve port is connected to the battery cooler to deliver the coolant to the battery cooler.

[0014] By adopting the above scheme, the state of the coolant circuit is adjusted by setting a five-way reversing valve, and the coolant circuit can be switched by using a simple component such as a five-way reversing valve, thereby reducing the control cost. Moreover, only a single component is set, and the layout is simpler.

[0015] According to another specific embodiment of the present invention, in the thermal management system of the automobile disclosed in the embodiment of the present invention, the circuit conversion device forms a series circuit with the battery cooler, the heater of the coolant circuit, the heat exchange component, and the power battery according to the heating demand of the second air-conditioning box and the power battery, or the cooling demand of the second air-conditioning box and the power battery, and after the coolant flows in from the first valve port, it flows through the second valve port, the third valve port in sequence, and flows out from the fourth valve port; and, the circuit conversion device forms a series circuit with the battery cooler, the heater of the coolant circuit, and the heat exchange component according to the cooling demand of the second air-conditioning box, and after the coolant flows in from the first valve port, it flows through the second valve port, the third valve port, the fourth valve port in sequence, and flows out from the fifth valve port.

[0016] By adopting the above scheme, by changing the flow direction of the circuit conversion device, the coolant circuit can meet the various temperature requirements of the second air conditioning box and the power battery, and the control process is simple and efficient. In addition, only through the circuit conversion device, the temperature circuit of the power battery and the temperature circuit of the second air conditioning box can work independently, with a simple structure and high circuit reliability.

[0017] According to another specific embodiment of the present invention, in the thermal management system of the automobile disclosed in the embodiment of the present invention, the circuit conversion device forms a series circuit with the battery cooler and the power battery according to the cooling demand of the power battery, and the coolant flows in from the first valve port and directly flows out from the fourth valve port; the circuit conversion device forms a series circuit with the heater and the heat exchange component of the coolant circuit according to the heating demand of the second air-conditioning box, and the coolant flows in from the third valve port after flowing out from the second valve port; the circuit conversion device forms a parallel circuit with the battery cooler, the power battery, the heater and the heat exchange component of the coolant circuit according to the heating demand of the second air-conditioning box and the cooling demand of the power battery; wherein the parallel circuit includes a first parallel sub-circuit and a second parallel sub-circuit; the first parallel sub-circuit includes a battery cooler, a power battery, and a circuit conversion device, and the coolant flows in from the fourth valve port after flowing in from the first valve port; the second parallel sub-circuit includes a heater, a heat exchange component and a circuit conversion device of the coolant circuit, and the coolant flows in from the third valve port after flowing out from the second valve port.

[0018] According to another specific embodiment of the present invention, in the thermal management system of the automobile disclosed in the embodiment of the present invention, the first circuit and / or the second circuit of the refrigerant circuit are turned on according to the temperature requirements of the first air-conditioning box, the second air-conditioning box, and the power battery.

[0019] By adopting the above solution, by controlling the conduction state of the first circuit and the second circuit, the refrigerant circuit can meet various temperature requirements of the first air-conditioning box, and the control process is simple and efficient.

[0020] According to another specific embodiment of the present invention, the thermal management system of the automobile disclosed in the embodiment of the present invention only conducts the first circuit according to the cooling demand of the power battery; only conducts the second circuit according to the cooling demand of the first air-conditioning box, or the dehumidification demand of the first air-conditioning box and the heating demand of the second air-conditioning box and the power battery; the first circuit and the second circuit are conducted according to the cooling demand of the first air-conditioning box, the second air-conditioning box, and the power battery, or the cooling demand of the first air-conditioning box and the power battery, or the cooling demand of the first air-conditioning box and the second air-conditioning box, or the dehumidification demand of the first air-conditioning box, the heating demand of the second air-conditioning box, and the cooling demand of the power battery.

[0021] An embodiment of the present invention further discloses a car, comprising a thermal management system of the car as described in any of the above embodiments, wherein a first air-conditioning box of the thermal management system is arranged at the front end of the car, and a second air-conditioning box is arranged at the rear end of the car.

[0022] The beneficial effects of the present invention are:

[0023] This solution sets a heat exchange component that can achieve dual functions of cooling and heating in the coolant circuit, and couples the circuit that realizes cooling and heating of the second air-conditioning box with the circuit that realizes cooling and heating of the power battery. There is no need to set an evaporator and a battery cooler for the second air-conditioning box and the power battery respectively. As a result, the air-conditioning system of the car is simplified from a three-evaporator system to a two-evaporator system, and there is no need to additionally set an evaporator, an expansion valve, and an air-conditioning pipeline system for the second air-conditioning box, which reduces the difficulty and cost of the whole vehicle layout. Furthermore, a heat exchange component is set in the second air-conditioning box, and there is no need to set a damper and other structures added for the current temperature change, which makes the structure of the second air-conditioning box more compact and further facilitates the layout of the whole vehicle. Furthermore, the second air-conditioning box and the power battery share a heater, and there is no need to set heaters for the second air-conditioning box and the power battery respectively, which further reduces the cost of the whole vehicle layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a thermal management system for an automobile provided by an embodiment of the present invention;

[0025] Figure 2-10 It is a state diagram of the thermal management system of the automobile provided by an embodiment of the present invention when the temperature requirements of the first air-conditioning box, the second air-conditioning box, and the power battery in the thermal management system of the automobile are different.

[0026] Description of reference numerals:

[0027] 1. Refrigerant circuit; 11. Compressor; 12. Condenser; 13. Evaporator; 14. Damper; 15. Heater; 16. First expansion valve; 17. Second expansion valve; 2. Coolant circuit; 21. Power battery; 22. Circuit conversion device; 23. Heater; 24. Heat exchange component; 25. Cooling kettle; 26. First conveying component; 27. Second conveying component; 3. First air-conditioning box; 4. Second air-conditioning box; 5. Battery cooler; a. First valve port; b. Second valve port; c. Third valve port; d. Fourth valve port; e. Fifth valve port. DETAILED DESCRIPTION

[0028] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0029] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0030] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0032] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] In order to solve the problem that the layout of the whole vehicle is difficult and costly due to the need to equip the new energy vehicle with two front and rear air conditioners in the prior art, the embodiment of the present invention provides a thermal management system for the vehicle. Specifically, refer to Figure 1 The thermal management system of the automobile provided in this embodiment includes a refrigerant circuit 1, a coolant circuit 2, a first air-conditioning box 3, and a second air-conditioning box 4. Among them, the refrigerant circuit 1 is used to achieve the temperature requirement of the first air-conditioning box 3, and the refrigerant circuit 1 includes a compressor 11, a condenser 12, an evaporator 13, and a battery cooler 5. The compressor 11, the condenser 12, and the battery cooler 5 are connected in series in sequence via a pipeline to form a first circuit. The compressor 11, the condenser 12, and the evaporator 13 are connected in series in sequence via a pipeline to form a second circuit. The first circuit and the second circuit are connected in parallel to form a refrigerant circuit 1. The evaporator 13 is arranged in the first air-conditioning box 3. The coolant circuit 2 is used to achieve the temperature requirement of the second air-conditioning box 4 and the power battery 21 of the automobile, and the coolant circuit 2 includes a power battery 21, a battery cooler 5, a circuit conversion device 22, a heater 23, and a heat exchange component 24. The power battery 21, the battery cooler 5, the heater 23, and the heat exchange component 24 are all connected to the circuit conversion device 22. The circuit conversion device 22 forms a series circuit or a parallel circuit with at least two of the power battery 21, the battery cooler 5, the heater 23, and the heat exchange component 24 according to the temperature requirements of the second air-conditioning box 4 and the power battery 21. In addition, the heat exchange component 24 is arranged in the second air-conditioning box 4 to achieve the heating demand or cooling demand of the second air-conditioning box 4. In addition, the coolant circuit 2 and the refrigerant circuit 1 share a battery cooler 5.

[0035] Adopting the above scheme, this scheme sets a heat exchange component that can realize the dual functions of cold and hot in the coolant circuit, and couples the circuit that realizes the cooling and heating of the second air-conditioning box with the circuit that realizes the cooling and heating of the power battery. There is no need to set an evaporator and a battery cooler for the second air-conditioning box and the power battery respectively. As a result, the air-conditioning system of the car is simplified from a three-evaporator system to a two-evaporator system, and there is no need to set an evaporator, an expansion valve, and an air-conditioning pipeline system for the second air-conditioning box, which reduces the difficulty and cost of the whole vehicle layout. Furthermore, a heat exchange component is set in the second air-conditioning box, and there is no need to set a damper and other structures added for the current temperature change, which makes the structure of the second air-conditioning box more compact and further facilitates the layout of the whole vehicle. Furthermore, the second air-conditioning box and the power battery share a heater, and there is no need to set heaters for the second air-conditioning box and the power battery respectively, which further reduces the cost of the whole vehicle layout.

[0036] Next, refer to Figure 1-10 The thermal management system of an automobile provided by an embodiment of the present invention is described in detail.

[0037] First, the refrigerant circuit 1 will be described.

[0038] The refrigerant circuit 1 is used to achieve the temperature requirement of the first air-conditioning box 3. The refrigerant circuit 1 includes a compressor 11, a condenser 12, an evaporator 13, and a battery cooler 5. The compressor 11, the condenser 12, and the battery cooler 5 are connected in series via a pipeline to form a first circuit. The compressor 11, the condenser 12, and the evaporator 13 are connected in series via a pipeline to form a second circuit. The first circuit and the second circuit are connected in parallel to form the refrigerant circuit 1. The evaporator 13 is arranged in the first air-conditioning box 3.

[0039] Specifically, the temperature requirements of the first air-conditioning box 3 include but are not limited to heating, cooling, dehumidification, etc., which are not limited in this embodiment.

[0040] The compressor 11 can provide power for the refrigeration cycle, and can compress the low-temperature and low-pressure refrigerant gas and output the high-temperature and high-pressure refrigerant gas to the condenser 12 .

[0041] The condenser 12 releases a large amount of heat to the refrigerant gas to liquefy the refrigerant gas, and transmits the liquefied refrigerant to the evaporator 13 .

[0042] The evaporator 13 absorbs a large amount of heat, which gradually reduces the temperature of the refrigerant to achieve a cooling effect.

[0043] Preferably, in this embodiment, the refrigerant circuit 1 also includes a throttling and pressure reduction component, and the throttling and pressure reduction component includes a first expansion valve 16 and a second expansion valve 17. Among them, the first expansion valve 16 is arranged between the condenser 12 and the evaporator 13, and is close to the evaporator 13. The first expansion valve 16 is used to limit the flow and pressure of the refrigerant so that the flow and pressure of the refrigerant can adapt to the flow and pressure requirements of the evaporator 13. In this embodiment, the first expansion valve 16 uses a thermal expansion valve or an electronic expansion valve with a switch. The second expansion valve 17 is arranged between the condenser 12 and the battery cooler 5, and is close to the battery cooler 5. The function of the second expansion valve 17 is also to limit the flow and pressure of the refrigerant so that the flow and pressure of the refrigerant can adapt to the flow and pressure requirements of the battery cooler 5. In this embodiment, the second expansion valve 17 can also use a thermal expansion valve or an electronic expansion valve with a switch.

[0044] Preferably, the first air-conditioning box 3 further includes a damper 14 and a heater 15. The damper 14 is controlled by a damper motor (not shown in the figure) and can adjust the size and direction of the air-conditioning air output. In addition, the heater 15 of the first air-conditioning box 3 is used to meet the heating demand of the first air-conditioning box 3, and the evaporator 13 is used to meet the cooling demand of the first air-conditioning box 3. When the first air-conditioning box 3 needs to be heated, the heater 15 of the first air-conditioning box 3 works; when the first air-conditioning box 3 needs to be cooled, the evaporator 13 of the first air-conditioning box 3 works.

[0045] Specifically, the first circuit and the second circuit of the refrigerant circuit 1 are turned on according to the temperature requirements of the first air-conditioning box 3 , the second air-conditioning box 4 , and the power battery 21 .

[0046] It should be noted that, in this embodiment, only the first loop may be turned on, only the second loop may be turned on, the first loop and the second loop may be turned on at the same time, or both the first loop and the second loop may be turned off.

[0047] More specifically, in this embodiment, reference Figure 8 , only the first circuit is turned on according to the cooling demand of the power battery 21. That is, when the battery is in cooling demand and the first air-conditioning box 3 and the second air-conditioning box 4 have no cooling demand, the first circuit is turned on.

[0048] refer to Figure 6 and Fig.10In this embodiment, only the second circuit is turned on according to the cooling demand of the first air-conditioning box 3, or the dehumidification demand of the first air-conditioning box 3 and the heating demand of the second air-conditioning box 4 and the power battery 21. That is, when the first air-conditioning box 3 has a cooling demand, and the second air-conditioning box 4 and the power battery 21 have no cooling demand or heating demand, the second circuit is turned on. Alternatively, when the first air-conditioning box 3 has a dehumidification demand, and the second air-conditioning box 4 and the power battery 21 have a heating demand, the second circuit is turned on.

[0049] refer to Figure 4 , Figure 5 , Figure 7 , Fig. 9 In this embodiment, the first circuit and the second circuit are connected according to the cooling demand of the first air-conditioning box 3, the second air-conditioning box 4, and the power battery 21, or the cooling demand of the first air-conditioning box 3 and the power battery 21, or the cooling demand of the first air-conditioning box 3 and the second air-conditioning box 4, or the dehumidification demand of the first air-conditioning box 3, the heating demand of the second air-conditioning box 4, and the cooling demand of the power battery 21. That is to say, in this embodiment, there are four situations in which the first circuit and the second circuit are connected at the same time; the first one, the first air-conditioning box 3 and the second air-conditioning box 4 both have cooling demand, and the power battery 21 also has cooling demand; the second one, the first air-conditioning box 3 and the second air-conditioning box 4 both have cooling demand, and the power battery 21 has no cooling demand; the third one, the first air-conditioning box 3 and the power battery 21 both have cooling demand, and the second air-conditioning box 4 has no heating demand or cooling demand; the fourth one, the first air-conditioning box 3 has dehumidification demand, the second air-conditioning box 4 has heating demand, and the power battery 21 has cooling demand.

[0050] It should be explained that when both the first air conditioning box 3 and the second air conditioning box 4 have heating requirements, and the power battery 21 has no cooling or heating requirements, cooling is not required at this time, and there is no need to conduct the first circuit and the second circuit. Both the first circuit and the second circuit are not working.

[0051] Next, the coolant circuit 2 will be described.

[0052] The coolant circuit 2 is used to achieve the temperature requirements of the second air-conditioning box 4 and the power battery 21 of the vehicle. The coolant circuit 2 includes the power battery 21, the battery cooler 5, the circuit conversion device 22, the heater 23, and the heat exchange component 24. The power battery 21, the battery cooler 5, the heater 23, and the heat exchange component 24 are all connected to the circuit conversion device 22. The circuit conversion device 22 forms a series circuit or a parallel circuit with at least two of the power battery 21, the battery cooler 5, the heater 23, and the heat exchange component 24 according to the temperature requirements of the second air-conditioning box 4 and the power battery 21.

[0053] Specifically, the temperature requirement of the second air-conditioning box 4 is heating or cooling; the temperature requirement of the power battery 21 is heating or cooling.

[0054] Preferably, in this embodiment, since the heating demand of the power battery 21 is smaller than the heating demand of the second air-conditioning box 4, in this embodiment, the heater 23 of the coolant circuit 2 is arranged at a position close to the second air-conditioning box 4. Therefore, after the heater 23 generates heat to heat the coolant, the high-temperature coolant immediately flows into the heat exchange component 24 of the second air-conditioning box 4, which saves the energy required by the heater 23 and makes the temperature of the second air-conditioning box 4 more stable and more comfortable.

[0055] It should be noted that the heat exchange component 24 is disposed in the second air conditioning box 4 to achieve the heating demand or cooling demand of the second air conditioning box 4. In this embodiment, the heat exchange component 24 is a heat exchange core with both cold and hot functions.

[0056] It should also be noted that the coolant circuit 2 and the refrigerant circuit 1 share a battery cooler 5 .

[0057] Preferably, the coolant circuit 2 further includes a cooling kettle 25, a first conveying component 26, and a second conveying component 27. The cooling kettle 25 is arranged between the battery cooler 5 and the first conveying component 26; the first conveying component 26 is arranged between the cooling kettle 25 and the circuit conversion device 22, so that the coolant flows from the cooling kettle 25 to the circuit conversion device 22. The second conveying component 27 is arranged between the circuit conversion device 22 and the heater 23 of the coolant circuit 2, so that the coolant flows from the circuit conversion device 22 to the heater 23 of the coolant circuit 2.

[0058] Specifically, the cooling kettle 25 is used to store cooling liquid. The first conveying component 26 and the second conveying component 27 are both water pumps.

[0059] More specifically, the circuit conversion device 22 is a five-way reversing valve, which includes a first valve port a, a second valve port b, a third valve port c, a fourth valve port d, and a fifth valve port e. In addition, the first valve port a is connected to the first delivery component 26 to receive the coolant delivered by the cooling kettle 25. The second valve port b is connected to the second delivery component 27 to deliver the coolant to the heater 23 of the coolant circuit 2. The third valve port c is connected to the heat exchange component 24 to receive the coolant delivered by the heat exchange component 24. The fourth valve port d is connected to the power battery 21 to deliver the coolant to the power battery 21. The fifth valve port e is connected to the battery cooler 5 to deliver the coolant to the battery cooler 5.

[0060] In this embodiment, the circuit conversion device 22 forms a series circuit or a parallel circuit with at least two of the power battery 21, the battery cooler 5, the heater 23, and the heat exchange component 24 according to the temperature requirements of the second air-conditioning box 4 and the power battery 21.

[0061] Specifically, refer to Figure 2 , Figure 4 , Fig.10 , the circuit conversion device 22 forms a series circuit with the battery cooler 5, the heater 23 of the coolant circuit 2, the heat exchange component 24, and the power battery 21 according to the heating demand of the second air-conditioning box 4 and the power battery 21, or the cooling demand of the second air-conditioning box 4 and the power battery 21, and the coolant flows in from the first valve port a, flows through the second valve port b, the third valve port c in sequence, and flows out from the fourth valve port d. That is to say, when the coolant circuit 2 has a heating demand from the second air-conditioning box 4 and the power battery 21, or when the second air-conditioning box 4 and the power battery 21 have a cooling demand, the circuit conversion device 22 will form a series circuit with the battery cooler 5, the heater 23 of the coolant circuit 2, the heat exchange component 24, and the power battery 21. The coolant flows from the cooling kettle 25 to the first conveying component 26, then passes through the first valve port a, the second valve port b to the second conveying component 27, flows through the heater 23 for heating, then passes through the heat exchange component 24 to the third valve port c, flows out from the fourth valve port d and flows to the power battery 21 and the battery cooler 5.

[0062] refer to Figure 5 , the circuit conversion device 22 forms a series circuit with the battery cooler 5, the heater 23 of the coolant circuit 2, and the heat exchange component 24 according to the cooling demand of the second air-conditioning box 4, and the coolant flows in from the first valve port a, flows through the second valve port b, the third valve port c, the fourth valve port d in sequence, and flows out from the fifth valve port e. In other words, when the second air-conditioning box 4 has a cooling demand and the power battery 21 has no cooling demand, the power battery 21 will not be cooled. After the coolant flows through the first valve port a, the second valve port b and the heat exchange component 24, it flows through the third valve port c and the fourth valve port d, and then flows to the fifth valve port e, and then flows to the battery cooler 5.

[0063] refer to Figure 7 , Figure 8 , the circuit conversion device 22 forms a series circuit with the battery cooler 5 and the power battery 21 according to the cooling demand of the power battery 21, and the coolant flows in from the first valve port a and flows out directly from the fourth valve port d. That is to say, when the power battery 21 has a cooling demand and the second air-conditioning box 4 has no cooling demand and heating demand, the circuit conversion device 22 forms a series circuit with the battery cooler 5 and the power battery 21, and the coolant flows out from the cooling kettle 25, flows through the first conveying component 26 and the first valve port a, and flows out directly from the fourth valve port d, flows through the power battery 21, and then flows to the battery cooler 5.

[0064] refer to Figure 3, the circuit conversion device 22 forms a series circuit with the heater 23 and the heat exchange component 24 of the coolant circuit 2 according to the heating demand of the second air-conditioning box 4, and the coolant flows out from the second valve port b and flows in from the third valve port c. In other words, when the second air-conditioning box 4 has a heating demand and the power battery 21 has no cooling demand or heating demand, the circuit conversion device 22 forms a series circuit with the heater 23 and the heat exchange component 24 of the coolant circuit 2, and the coolant flows through the heater 23 and is heated, and then flows from the third valve port c to the first valve port a to form a cycle.

[0065] refer to Fig. 9 , the circuit conversion device 22 forms a parallel circuit with the battery cooler 5, the power battery 21, the heater 23 of the coolant circuit 2, and the heat exchange component 24 according to the heating demand of the second air-conditioning box 4 and the cooling demand of the power battery 21. Among them, the parallel circuit includes a first parallel sub-circuit and a second parallel sub-circuit. The first parallel sub-circuit includes the battery cooler 5, the power battery 21, the circuit conversion device 22, and the coolant flows in from the first valve port a and directly flows out from the fourth valve port d. The second parallel sub-circuit includes the heater 23, the heat exchange component 24, and the circuit conversion device 22 of the coolant circuit 2, and the coolant flows in from the third valve port c after flowing out from the second valve port b.

[0066] Next, combine Figure 2-9 The state of the thermal management system of the automobile is described when the temperature requirements of the first air conditioning box 3, the second air conditioning box 4, and the power battery 21 are different. It should be noted that: Figure 2-9 In the figure, the dotted line indicates that, in this state, the circuit shown by the dotted line does not work.

[0067] refer to Figure 2 , which is a schematic diagram of the state of the thermal management system of the car in winter heating mode. In this state, the first air-conditioning box 3, the second air-conditioning box 4 and the power battery 21 all have heating requirements. The heating of the first air-conditioning box 3 is achieved through an independent heating system, for example, it can be a heating system using an electric heater on the air side or a warm air core in conjunction with an electric heater on the water side, which is not limited in this embodiment. The second air-conditioning box 4 shares a heating system with the power battery 21. The temperature requirement of the warm air core (heat exchange component 24) of the second air-conditioning box 4 is generally higher than the temperature requirement for cooling the power battery 21. Therefore, at this time, the target power of the water-side electric heater (heater 23) is based on the heating comfort control of the second air-conditioning box 4, and the upper power limit is based on the over-temperature protection threshold of the coolant inlet of the power battery 21.

[0068] In this state, the refrigerant circuit 1 does not operate. Figure 2The refrigerant circuit 1 in the figure is shown by a dotted line. The heater 15 of the refrigerant circuit 1 works to deliver hot air into the cockpit through the damper 14. At the same time, the heater 23 of the coolant circuit 2 also works to heat the coolant to provide heat for the second air conditioning box 4 and the power battery 21.

[0069] refer to Figure 3 , is a schematic diagram of the state of the thermal management system of the automobile in another winter heating mode. In this state, both the first air-conditioning box 3 and the second air-conditioning box 4 have heating requirements, and the power battery 21 has no heating requirement.

[0070] In this state, the refrigerant circuit 1 does not work, and the heater 15 of the refrigerant circuit 1 works to deliver hot air into the cockpit through the damper 14. The heater 23 of the coolant circuit 2 works to heat the coolant to provide heat for the second air conditioning box 4. At this time, the first conveying component 26 does not work, and the second conveying component 27 works.

[0071] Considering that the heating of the power battery 21 generally runs in the charging mode, the ambient temperature is low at this time, and the charging rate and efficiency are low. When driving or the temperature is slightly higher, the power battery 21 does not need to be heated. Therefore, the water-side electric heater (heater 23) is placed near the entrance of the warm air core of the second air-conditioning box 4, mainly for the comfort of the second air-conditioning box 4. Simplify the mode. When the power battery 21 needs to be heated, the water-side electric heater will always be connected to the warm air core of the second air-conditioning box 4.

[0072] refer to Figure 4 , is a schematic diagram of the state of the thermal management system of the automobile in the summer cooling mode. In this state, the first air-conditioning box 3, the second air-conditioning box 4, and the power battery 21 all have cooling requirements.

[0073] Moreover, in this state, the first air conditioning box 3 directly cools through the evaporator 13; the second air conditioning box 4 cools through the coolant cooled by the battery cooler 5 flowing through the heat exchange component 24 to achieve cooling. The battery cooler 5 is connected in series to the rear side of the heat exchange component 24 of the second air conditioning box 4. At this time, both the first conveying component 26 and the second conveying component 27 are working.

[0074] refer to Figure 5 , is a schematic diagram of the state of the thermal management system of the automobile in another summer cooling mode. In this state, both the first air-conditioning box 3 and the second air-conditioning box 4 have cooling requirements, and the power battery 21 has no cooling requirement.

[0075] Moreover, in this state, the first air conditioning box 3 directly refrigerates through the evaporator 13; the second air conditioning box 4 refrigerates through the battery cooler 5. The coolant flows through the fourth valve port d and then flows to the fifth valve port e. After flowing out of the fifth valve port e, it flows to the battery cooler 5 without flowing through the power battery 21. At this time, both the first conveying component 26 and the second conveying component 27 are working.

[0076] refer to Figure 6 , is a schematic diagram of the state of the thermal management system of the automobile in another summer cooling mode. In this state, the first air-conditioning box 3 has a cooling demand, and the second air-conditioning box 4 and the power battery 21 have no cooling demand or heating demand.

[0077] Furthermore, in this state, the first air conditioning box 3 directly cools through the evaporator 13. The coolant circuit 2 does not work, the circuit switching device 22 is not powered, and the first conveying component 26 and the second conveying component 27 do not work.

[0078] refer to Figure 7 , is a schematic diagram of the state of the thermal management system of the automobile in another summer cooling mode. In this state, the first air-conditioning box 3 and the power battery 21 both have cooling requirements, and the second air-conditioning box 4 has no cooling or heating requirements.

[0079] In this state, the first air conditioning box 3 directly cools through the evaporator 13. After the coolant flows in from the first valve port a, it directly flows out from the fourth valve port d and then flows to the power battery 21 to cool the power battery 21. In addition, the second conveying component 27 does not work.

[0080] refer to Figure 8 , is a schematic diagram of the state of the thermal management system of the automobile in another summer cooling mode. In this state, the first air-conditioning box 3 and the second air-conditioning box 4 have no cooling demand, and the power battery 21 has cooling demand.

[0081] The first expansion valve 16 does not work. After the coolant flows in from the first valve port a, it directly flows out from the fourth valve port d and then flows to the power battery 21 to cool the power battery 21. In addition, the second conveying component 27 does not work.

[0082] In spring and autumn, the cooling and thermal management requirements of the first air-conditioning box 3, the second air-conditioning box 4 and the power battery 21 are more complex, and there may be a cooling and heating working mode at the same time. The first air-conditioning box 3 is generally in dehumidification mode, that is, the evaporator 13 of the first air-conditioning box 3 and the heating function of the first air-conditioning box 3 exist at the same time. In the present invention, in the heating scheme of the first air-conditioning box 3, the heating part of the first air-conditioning box 3 can be controlled independently, which will not be repeated here.

[0083] refer to Fig. 9, is a schematic diagram of the state of the thermal management system of the automobile in the spring and autumn mode. In this state, the first air-conditioning box 3 has a dehumidification demand, the second air-conditioning box 4 has a heating demand, and the power battery 21 has a cooling demand.

[0084] In the coolant circuit 2, the heating circuit of the second air-conditioning box 4 and the cooling circuit of the power battery 21 are separated and independently operated through the circuit conversion device 22. The heating of the second air-conditioning box 4 is realized by the operation of the heater 23; the cooling demand of the power battery 21 is realized by the operation of the battery cooler 5, and the second expansion valve 17 works to transfer the heat of the refrigerant circuit 1 to the coolant circuit 2. At this time, in the circuit conversion device 22, the first valve port a is connected to the fourth valve port d, the second valve port b is connected to the third valve port c, and the first conveying component 26 and the second conveying component 27 are both working.

[0085] refer to Fig.10 , is a schematic diagram of the state of the thermal management system of the automobile in another spring and autumn mode. In this state, the first air-conditioning box 3 has a dehumidification demand, the second air-conditioning box 4 has a heating demand, and the power battery 21 has a cooling demand.

[0086] The second expansion valve 17 is in a closed state, and the battery cooler 5 is in an inoperative state. The heating circuit of the second air-conditioning box 4 and the cooling circuit of the power battery 21 are connected in series through the circuit conversion device 22, and the heating demand is achieved through the operation of the heater 23. At this time, in the circuit conversion device 22, the first valve port a is connected to the second valve port b, the third valve port c is connected to the fourth valve port d, and the first conveying component 26 and the second conveying component 27 are both in operation.

[0087] It should be noted that when the first air-conditioning box 3 is in the dehumidification mode, the second air-conditioning box 4 and the power battery 21 can still be combined according to the aforementioned summer cooling working state when cooling is required, which will not be repeated in this embodiment.

[0088] Based on the above automobile thermal management system, an embodiment of the present invention further provides an automobile comprising the automobile thermal management system described in the above embodiment, wherein the first air conditioning box of the thermal management system is arranged at the front end of the automobile and the second air conditioning box is arranged at the rear end of the automobile.

[0089] The first air-conditioning box mainly provides cooling, heating or dehumidification functions for the first and second row seat areas, and the second air-conditioning box provides cooling or heating functions for the third row seat area.

[0090] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A thermal management system for an automobile, characterized in that: It includes a refrigerant circuit, a coolant circuit, a first air conditioning box, and a second air conditioning box; wherein The refrigerant circuit is used to achieve the temperature requirement of the first air-conditioning box, and the refrigerant circuit includes a compressor, a condenser, an evaporator, and a battery cooler; the compressor, the condenser, and the battery cooler are sequentially connected in series via a pipeline to form a first circuit; the compressor, the condenser, and the evaporator are sequentially connected in series via a pipeline to form a second circuit; the first circuit and the second circuit are connected in parallel to form the refrigerant circuit; the evaporator is arranged in the first air-conditioning box; The coolant circuit is used to achieve the temperature requirements of the second air-conditioning box and the power battery of the vehicle, and the coolant circuit includes the power battery, the battery cooler, a circuit conversion device, a heater, and a heat exchange component; the power battery, the battery cooler, the heater, and the heat exchange component are all connected to the circuit conversion device, and the circuit conversion device forms a series circuit or a parallel circuit with at least two of the power battery, the battery cooler, the heater, and the heat exchange component according to the temperature requirements of the second air-conditioning box and the power battery; and The heat exchange component is arranged in the second air-conditioning box to realize the heating demand or cooling demand of the second air-conditioning box; and The coolant circuit and the refrigerant circuit share the battery cooler.

2. The thermal management system for an automobile as claimed in claim 1, characterized in that: The refrigerant circuit further includes a throttling and pressure reducing component, and the throttling and pressure reducing component includes a first expansion valve and a second expansion valve; wherein The first expansion valve is disposed between the condenser and the evaporator and close to the evaporator; The second expansion valve is disposed between the condenser and the battery cooler and is close to the battery cooler.

3. The thermal management system for an automobile as claimed in claim 1, characterized in that: The first air conditioning box also includes a damper and a heater; and The heater of the first air-conditioning box is used to meet the heating demand of the first air-conditioning box, and the evaporator is used to meet the cooling demand of the first air-conditioning box.

4. The thermal management system for an automobile as claimed in claim 1, characterized in that: The coolant circuit also includes a cooling kettle, a first conveying component, and a second conveying component; The cooling kettle is arranged between the battery cooler and the first conveying component; The first conveying component is arranged between the cooling kettle and the circuit conversion device so that the coolant flows from the cooling kettle to the circuit conversion device; The second conveying member is disposed between the circuit switching device and the heater of the coolant circuit to allow the coolant to flow from the circuit switching device to the heater of the coolant circuit.

5. The thermal management system for an automobile as claimed in claim 4, characterized in that: The circuit conversion device is a five-way reversing valve, which includes a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port; and The first valve port is connected to the first delivery component to receive the coolant delivered by the cooling kettle; The second valve port is connected to the second delivery component to deliver the coolant to the heater of the coolant circuit; The third valve port is connected to the heat exchange component to receive the coolant delivered by the heat exchange component; The fourth valve port is connected to the power battery to deliver the coolant to the power battery; The fifth valve port is connected to the battery cooler to deliver the coolant to the battery cooler.

6. The thermal management system for an automobile as claimed in claim 5, characterized in that: The circuit conversion device forms a series circuit with the battery cooler, the heater of the coolant circuit, the heat exchange component, and the power battery according to the heating demand of the second air-conditioning box and the power battery, or the cooling demand of the second air-conditioning box and the power battery, and the coolant flows into the first valve port, flows through the second valve port and the third valve port in sequence, and flows out from the fourth valve port; and The circuit conversion device forms a series circuit with the battery cooler, the heater of the coolant circuit, and the heat exchange component according to the cooling demand of the second air-conditioning box, and after the coolant flows in from the first valve port, it flows through the second valve port, the third valve port, the fourth valve port in sequence, and flows out from the fifth valve port.

7. The thermal management system for an automobile as claimed in claim 5, characterized in that: The circuit conversion device forms a series circuit with the battery cooler and the power battery according to the cooling demand of the power battery, and the coolant flows out directly from the fourth valve port after flowing into the first valve port; The circuit conversion device forms a series circuit with the heater and the heat exchange component of the coolant circuit according to the heating demand of the second air conditioner, and the coolant flows in from the third valve port after flowing out from the second valve port; The circuit conversion device forms a parallel circuit with the battery cooler, the power battery, the heater of the coolant circuit, and the heat exchange component according to the heating demand of the second air conditioning box and the cooling demand of the power battery; wherein The parallel circuit includes a first parallel sub-circuit and a second parallel sub-circuit; the first parallel sub-circuit includes the battery cooler, the power battery, and the circuit conversion device, and the coolant flows in from the first valve port and then flows out from the fourth valve port; the second parallel sub-circuit includes the heater, the heat exchange component, and the circuit conversion device of the coolant circuit, and the coolant flows in directly from the third valve port after flowing out from the second valve port.

8. The thermal management system for an automobile as claimed in claim 1, characterized in that: The first circuit and / or the second circuit of the refrigerant circuit are turned on according to temperature requirements of the first air-conditioning box, the second air-conditioning box, and the power battery.

9. The thermal management system for an automobile as claimed in claim 8, characterized in that: According to the cooling requirement of the power battery, only the first circuit is turned on; According to the cooling demand of the first air-conditioning box, or the dehumidification demand of the first air-conditioning box and the heating demand of the second air-conditioning box and the power battery, only the second circuit is turned on; The first circuit and the second circuit are conducted according to the cooling demand of the first air-conditioning box, the second air-conditioning box, and the power battery, or the cooling demand of the first air-conditioning box and the power battery, or the cooling demand of the first air-conditioning box and the second air-conditioning box, or the dehumidification demand of the first air-conditioning box, the heating demand of the second air-conditioning box, and the cooling demand of the power battery.

10. An automobile, characterized in that: A thermal management system for a vehicle comprising any one of claims 1 to 9; and The first air-conditioning box of the thermal management system is arranged at the front end of the automobile, and the second air-conditioning box is arranged at the rear end of the automobile.

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