Thermal management system

Abstract

The utility model discloses a thermal management system. The heat management system comprises a compressor heat exchange circulation loop, an electric drive heat exchange circulation loop, a battery heat exchange circulation loop, a first loop heat exchanger and a multi-way valve, the compressor heat exchange circulation loop comprises a compressor and a heat exchanger assembly which are communicated with each other, and the electric drive heat exchange circulation loop comprises an electric drive assembly. The battery heat exchange circulation loop comprises a power battery, the power battery is connected with the electric drive assembly through a multi-way valve, and the multi-way valve is arranged to connect or disconnect the electric drive heat exchange circulation loop and the battery heat exchange circulation loop. The compressor heat exchange circulation loop is communicated with the electric drive heat exchange circulation loop or the battery heat exchange circulation loop through the first loop heat exchanger; through the implementation mode, the power battery, the electric drive assembly and the compressor heat exchange circulation loop can be mutually connected for heat exchange through the first loop heat exchanger and the multi-way valve, and the flexibility and the heat management efficiency of the heat management system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a thermal management system. BACKGROUND

[0002] With the continuous development of modern life, vehicles have become an indispensable important tool in daily life, and the thermal management system plays an extremely important role in the vehicle system, which provides heating or cooling functions for the vehicle, and the thermal management system includes providing heat dissipation or heating functions for components such as the passenger cabin, the electric drive assembly, and the battery.

[0003] The vehicle thermal management system needs to consider the thermal management needs of different vehicle parts at the same time, and needs to be reasonably optimized and designed to improve the vehicle thermal management efficiency, meet various thermal management needs of the vehicle, and improve the vehicle thermal management performance. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the present application is to provide a thermal management system, which aims to solve the above technical problems existing in the prior art.

[0005] To solve the above problems, the present application provides a thermal management system, which comprises a compressor heat exchange circulation loop, an electric drive heat exchange circulation loop, a battery heat exchange circulation loop, a first loop heat exchanger and a multi-way valve. The compressor heat exchange circulation loop comprises a compressor and a heat exchanger assembly which are in communication with each other. The electric drive heat exchange circulation loop comprises an electric drive assembly. The battery heat exchange circulation loop comprises a power battery. The power battery is connected with the electric drive assembly through the multi-way valve. The multi-way valve is configured to conduct or cut off the electric drive heat exchange circulation loop and the battery heat exchange circulation loop. The compressor heat exchange circulation loop is connected with the electric drive heat exchange circulation loop or the battery heat exchange circulation loop through the first loop heat exchanger.

[0006] Preferably, the thermal management system further comprises a second loop heat exchanger. The compressor heat exchange circulation loop comprises a separator and a heat exchanger pipeline composed of the heat exchanger assembly. The compressor, the first loop heat exchanger, the second loop heat exchanger and the separator are connected in sequence to form an outer loop. The second loop heat exchanger connects the outer loop and the battery heat exchange circulation loop.

[0007] The heat exchanger pipeline and the outer loop form a first connection point, a second connection point, a third connection point and a fourth connection point. The first connection point is located on the pipeline between the first loop heat exchanger and the second loop heat exchanger. The second connection point is located between the first loop heat exchanger and the first connection point. The third connection point is located on the pipeline between the separator and the second loop heat exchanger. The fourth connection point is located on the pipeline between the first connection point and the second loop heat exchanger.

[0008] Preferably, the heat exchanger assembly comprises an outdoor heat exchanger, a first indoor heat exchanger and a second indoor heat exchanger, the heat exchanger pipeline has a fifth connection point, a sixth connection point and a seventh connection point, the outdoor heat exchanger is connected between the first connection point and the fifth connection point, the first indoor heat exchanger is arranged on the pipeline between the sixth connection point and the seventh connection point, the sixth connection point and the third connection point are communicated, the seventh connection point and the fourth connection point and the fifth connection point respectively form a pipeline, the second indoor heat exchanger is arranged on the pipeline between the second connection point and the seventh connection point, and the fifth connection point and the sixth connection point are communicated.

[0009] Preferably, a first switch valve is arranged between the first connection point and the second connection point on the outer circuit, a first expansion valve is arranged between the first connection point and the fourth connection point, and a second expansion valve is arranged between the fourth connection point and the second circuit heat exchanger.

[0010] Preferably, a second switch valve is arranged on the pipeline between the second connection point and the second indoor heat exchanger, a third switch valve is arranged on the pipeline between the fifth connection point and the sixth connection point, a fourth switch valve is arranged between the fifth connection point and the seventh connection point, and a third expansion valve is arranged on the pipeline between the seventh connection point and the first indoor heat exchanger.

[0011] Preferably, the compressor heat exchange circulation loop comprises a fourth expansion valve, one end of the fourth expansion valve is connected between the compressor and the first circuit heat exchanger, and the other end of the fourth expansion valve is connected to the separator to form a compressor self-loop.

[0012] Preferably, the electric drive heat exchange circulation loop is connected to the first interface, the second interface and the third interface of the multi-way valve, and the battery heat exchange circulation loop is connected to the fourth interface and the fifth interface of the multi-way valve.

[0013] Preferably, the electric drive heat exchange circulation loop comprises a first three-way valve and a first water pump, one end of the first circuit heat exchanger is connected to the first interface, the other end of the first circuit heat exchanger is connected to the first end of the first three-way valve, the second end of the first three-way valve is connected between the first circuit heat exchanger and the first interface, the third end of the first three-way valve is connected to one end of the electric drive assembly, the other end of the electric drive assembly is connected to one end of the first water pump, and the other end of the first water pump is connected to the second interface.

[0014] Preferably, the electric drive heat exchange circulation loop further comprises a low-temperature radiator, one end of the low-temperature radiator is connected between the first water pump and the second interface, and the other end of the low-temperature radiator is connected to the third interface.

[0015] Preferably, the thermal management system comprises a second circuit heat exchanger, the battery heat exchange circulation loop comprises a second water pump and a second three-way valve, one end of the second circuit heat exchanger is connected to one end of the power battery, the other end of the power battery is connected to the fourth interface, the other end of the second circuit heat exchanger is connected to the first end of the second three-way valve, the second end of the second three-way valve is connected between the power battery and the second circuit heat exchanger, and the third end of the second three-way valve is connected to one end of the second water pump, and the other end of the second water pump is connected to the fifth interface.

[0016] Compared with the prior art, the thermal management system provided by the application comprises a compressor heat exchange circulation loop, an electric drive heat exchange circulation loop, a battery heat exchange circulation loop, a first circuit heat exchanger and a multi-way valve, the compressor heat exchange circulation loop comprises a compressor and a heat exchanger assembly connected to each other, the electric drive heat exchange circulation loop comprises an electric drive assembly, the battery heat exchange circulation loop comprises a power battery, the power battery is connected to the electric drive assembly through the multi-way valve, the multi-way valve is configured to conduct or cut off the electric drive heat exchange circulation loop and the battery heat exchange circulation loop, and the compressor heat exchange circulation loop is connected to the electric drive heat exchange circulation loop or the battery heat exchange circulation loop through the first circuit heat exchanger; through the above-mentioned embodiments, the compressor heat exchange circulation loop provides refrigeration or heating functions for the vehicle through the compressor and the heat exchanger assembly, the electric drive heat exchange circulation loop and the compressor heat exchange circulation loop are interconnected through the first circuit heat exchanger, so that the electric drive assembly can exchange heat with the compressor heat exchange circulation loop, the battery heat exchange circulation loop is interconnected with the electric drive heat exchange circulation loop through the multi-way valve, so that the power battery, the electric drive assembly and the compressor heat exchange circulation loop can exchange heat with each other, and the thermal management system can absorb the waste heat of the electric drive assembly and the power battery, so that the vehicle thermal management system can have multiple different working modes, and the flexibility and thermal management efficiency of the thermal management system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort.

[0018] Figure 1 is a system structure schematic diagram of the thermal management system provided by the application;

[0019] Figure 2 is a structure schematic diagram of an embodiment of the thermal management system working in the first running mode provided by the application;

[0020] Figure 3 is a structure schematic diagram of another embodiment of the thermal management system working in the first running mode provided by the application;

[0021] Figure 4 is a structural schematic diagram of an embodiment of the heat management system provided by the present application working in the second operation mode;

[0022] Figure 5 is another structural schematic diagram of an embodiment of the heat management system provided by the present application working in the second operation mode;

[0023] Figure 6 is a structural schematic diagram of an embodiment of the heat management system provided by the present application working in the third operation mode;

[0024] Figure 7 is a structural schematic diagram of an embodiment of the heat management system provided by the present application working in the fourth operation mode.

[0025] Fig. 1 is a structural schematic diagram of an embodiment of the heat management system provided by the present application working in the first operation mode. DETAILED DESCRIPTION

[0026] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0029] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] With the continuous development of modern life, vehicles have become an important tool indispensable in daily life, and the thermal management system plays an extremely important role in the vehicle system, which provides heating or cooling functions for the vehicle, and the thermal management system includes providing heat dissipation or heating functions for components such as the passenger cabin, the electric drive assembly, and the battery.

[0035] The vehicle thermal management system needs to consider the thermal management needs of different vehicle components, and needs to be reasonably optimized and designed to improve the efficiency of the vehicle thermal management system, meet various thermal management needs of the vehicle, and improve the performance of the vehicle thermal management system.

[0036] To solve the related technical problems, the present application provides a thermal management system, see Figure 1 , Figure 1 is a system structure schematic diagram of the thermal management system provided by the present application.

[0037] The thermal management system includes a compressor 4 heat exchange circulation loop, an electric drive heat exchange circulation loop, a battery heat exchange circulation loop, a first loop heat exchanger 1, and a multi-way valve 3. The compressor heat exchange circulation loop includes a compressor 4 and a heat exchanger assembly 5 that are in communication with each other. The electric drive heat exchange circulation loop includes an electric drive assembly 24. The battery heat exchange circulation loop includes a power battery 28. The power battery 28 is connected to the electric drive assembly 24 through the multi-way valve 3. The multi-way valve 3 is configured to conduct or block the electric drive heat exchange circulation loop and the battery heat exchange circulation loop. The compressor 4 heat exchange circulation loop is connected to the electric drive heat exchange circulation loop or the battery heat exchange circulation loop through the first loop heat exchanger 1.

[0038] Through the above-mentioned embodiments, the compressor 4 heat exchange circulation loop provides cooling or heating functions for the vehicle through the compressor 4 and the heat exchanger assembly 5. The electric drive heat exchange circulation loop and the compressor 4 heat exchange circulation loop are interconnected through the first loop heat exchanger 1, so that the electric drive assembly 24 can exchange heat with the compressor 4 heat exchange circulation loop. The multi-way valve 3 connects the battery heat exchange circulation loop and the electric drive heat exchange circulation loop, so that the power battery 28, the electric drive assembly 24, and the compressor 4 heat exchange circulation loop can exchange heat with each other. Therefore, the vehicle thermal management system can have multiple different working modes, improving the flexibility and thermal management efficiency of the thermal management system.

[0039] The heat exchanger assembly 5 is used for heat exchange between the inside and outside of the vehicle, so that the compressor 4 heat exchange circulation loop provides cooling, heating, and dehumidification functions for the vehicle. The compressor heat exchange circulation loop has a refrigerant, which circulates in the compressor heat exchange circulation loop and continuously converts between gaseous and liquid states to exchange heat, so that the compressor heat exchange circulation loop provides cooling, heating, and other effects. The compressor heat exchange circulation loop mainly provides cooling and heating functions for the passenger cabin inside the vehicle.

[0040] The first circuit heat exchanger 1 can be a plate heat exchanger, one side of the first circuit heat exchanger 1 is connected to the compressor heat exchange circulation loop, and the other side of the first circuit heat exchanger 1 is connected in the electric drive heat exchange circulation loop, so that heat exchange is carried out between the two. The electric drive heat exchange circulation loop and the battery heat exchange circulation loop are connected through the multi-way valve 3 to exchange heat with each other, and then heat exchange is carried out between the compressor heat exchange circulation loop, the electric drive heat exchange circulation loop and the battery heat exchange circulation loop. The heat generated by the electric drive assembly 24 when working can be transmitted to the battery heat exchange circulation loop through the multi-way valve 3 to heat the power battery 28, and the heat generated by the electric drive assembly 24 can also be transmitted to the compressor heat exchange circulation loop through the first circuit heat exchanger 1 to assist in providing a heating function for the passenger compartment, and the compressor heat exchange circulation loop can transmit cold to the electric drive assembly 24 and the power battery 28 through the first circuit heat exchanger 1 and the multi-way valve 3. The electric drive assembly 24 includes a vehicle motor and an inverter brick control module. It should be noted that the multi-way valve 3 can control the connection or isolation of the electric drive heat exchange circulation loop and the battery heat exchange circulation loop, so that the electric drive heat exchange circulation loop and the battery heat exchange circulation loop exchange heat or do not exchange heat.

[0041] In some embodiments, the heat management system further comprises a second circuit heat exchanger 2, the compressor heat exchange circulation loop comprises a separator 6 and a heat exchanger pipeline composed of a heat exchanger assembly 5, the compressor 4, the first circuit heat exchanger 1, the second circuit heat exchanger 2 and the separator 6 are connected in sequence to form an outer loop, and the second circuit heat exchanger 2 connects the outer loop and the battery heat exchange circulation loop;

[0042] The heat exchanger pipeline and the outer loop form a first connection point 15, a second connection point 16, a third connection point 17 and a fourth connection point 18, the first connection point 15 is located on the pipeline between the first circuit heat exchanger 1 and the second circuit heat exchanger 2, the second connection point 16 is located between the first circuit heat exchanger 1 and the first connection point 15, the third connection point 17 is located on the pipeline between the separator 6 and the second circuit heat exchanger 2, and the fourth connection point 18 is located on the pipeline between the first connection point 15 and the second circuit heat exchanger 2.

[0043] The compressor 4 is used to convert the refrigerant in the compressor heat exchange cycle loop between low pressure state and high pressure state, and the separator 6 is used to filter the liquid refrigerant and gaseous refrigerant, so that the liquid refrigerant does not enter the compressor 4. The second loop heat exchanger 2 can make the battery heat exchange cycle loop directly exchange heat with the compressor heat exchange cycle loop, which is suitable for the case that the vehicle works in high temperature refrigeration or high temperature fast charging. Through the second loop heat exchanger 2, the power battery 28 can exchange heat with the compressor heat exchange cycle loop to achieve the purpose of rapid heat dissipation; when the vehicle needs to heat the power battery 28 in a low temperature environment (the power battery 28 has poor working performance in a low temperature environment), the power battery 28 needs to be heated but the heating requirement is not high (the power battery 28 enters the working state and will continue to generate heat spontaneously), the power battery 28 can exchange heat with the electric drive heat exchange cycle loop through the multi-way valve 3, and the electric drive heat exchange cycle loop exchanges heat with the compressor heat exchange cycle loop through the first loop heat exchanger 1, so as to heat the power battery 28. When the power battery 28 does not need to be heated after entering the working state, the multi-way valve 3 is closed to the electric drive heat exchange cycle loop and the battery heat exchange cycle loop.

[0044] The connection points between the heat exchanger pipeline and the external loop can be flexibly combined and switched among the first connection point 15, the second connection point 16, the third connection point 17 and the fourth connection point 18, so as to change the connection mode between the heat exchanger pipeline and the external loop, and further make the compressor heat exchange cycle loop work in different working modes (such as refrigeration, heating and dehumidification modes).

[0045] The heat exchanger assembly 5 includes an outdoor heat exchanger 50, a first indoor heat exchanger 51 and a second indoor heat exchanger 52, the heat exchanger pipeline has a fifth connection point 19, a sixth connection point 20 and a seventh connection point 21, the outdoor heat exchanger 50 is connected between the first connection point 15 and the fifth connection point 19, the first indoor heat exchanger 51 is arranged on the pipeline between the sixth connection point 20 and the seventh connection point 21, the sixth connection point 20 and the third connection point 17 are communicated, the seventh connection point 21 forms a pipeline with the fourth connection point 18 and the fifth connection point 19 respectively, and the second indoor heat exchanger 52 is arranged on the pipeline between the second connection point 16 and the seventh connection point 21. The fifth connection point 19 is communicated with the sixth connection point 20.

[0046] The first indoor heat exchanger 51 and the second indoor heat exchanger 52 are used for heat exchange between refrigerant in the compressor heat exchange circulation loop and the passenger cabin (absorbing heat of the passenger cabin or releasing heat to the passenger cabin) to provide refrigeration, heating and dehumidification and the like for the passenger cabin, and the outdoor heat exchanger 50 is used for heat exchange between refrigerant and the outdoor, and the outdoor heat exchanger 50 releases heat or absorbs heat to the outdoor to achieve the purpose of refrigeration or heating. The outdoor heat exchanger 50, the first indoor heat exchanger 51 and the second indoor heat exchanger 52 can be both condensers and evaporators (the condenser releases heat to the outside, and the evaporator absorbs heat from the outside), and in the utility model, the first indoor heat exchanger 51 mainly provides refrigeration function for the passenger cabin, and the second indoor heat exchanger 52 mainly provides heating function for the passenger cabin. The compressor heat exchange circulation loop is further provided with a blower 22 to make indoor air exchange heat with the first indoor heat exchanger 51 and the second indoor heat exchanger 52.

[0047] The first connecting point 15 to the seventh connecting point 21 can selectively connect the outdoor heat exchanger 50, the first indoor heat exchanger 51 and the second indoor heat exchanger 52 into the loop when the compressor heat exchange circulation loop works, and through switching connection of the first connecting point 15 to the seventh connecting point 21, the compressor heat exchange circulation loop can only connect the outdoor heat exchanger 50 and the second indoor heat exchanger 52, only connect the second indoor heat exchanger 52, only connect the outdoor heat exchanger 50 and the first indoor heat exchanger 51, only connect the outdoor heat exchanger 50 and the first indoor heat exchanger 51, and connect all of the outdoor heat exchanger 50, the first indoor heat exchanger 51 and the second indoor heat exchanger 52.

[0048] The first connecting point 15 and the second connecting point 16 on the outer loop are provided with the first switch valve 7, the first connecting point 15 and the fourth connecting point 18 are provided with the first expansion valve 11, and the fourth connecting point 18 and the second loop heat exchanger 2 are provided with the second expansion valve 12.

[0049] The first switch valve 7 can be an electromagnetic valve, which is used for controlling the conduction or cut-off of the pipeline between the first connecting point 15 and the second connecting point 16. The first expansion valve 11 and the second expansion valve 12 have the effect of changing the pressure of the refrigerant in the compressor heat exchange circulation loop, and are used for controlling the conduction or cut-off of the pipeline between the first connecting point 15 and the fourth connecting point 18 and the pipeline between the fourth connecting point 18 and the second loop heat exchanger 2, so as to switch different pipelines of the outer loop to change the working mode.

[0050] The pipeline between the second connecting point 16 and the second indoor heat exchanger 52 is provided with the second switch valve 8, the pipeline between the fifth connecting point 19 and the sixth connecting point 20 is provided with the third switch valve 9, the fifth connecting point 19 and the seventh connecting point 21 have the fourth switch valve 10, and the pipeline between the seventh connecting point 21 and the first indoor heat exchanger 51 is provided with the third expansion valve 13.

[0051] The second switch valve 8, the third switch valve 9 and the fourth switch valve 10 can be electromagnetic valves. The second switch valve 8 is used to control the on or off of the pipeline between the second connection point 16 and the second indoor heat exchanger 52, that is, to control whether the second indoor heat exchanger 52 is connected to the compressor heat exchange circulation loop. The third switch valve 9 and the fourth switch valve 10 are used to control the on or off of the pipeline between the fifth connection point 19 and the sixth connection point 20 and the pipeline between the fifth connection point 19 and the seventh connection point 21. The third expansion valve 13 can control the on or off of the pipeline between the first indoor heat exchanger 51 and the seventh connection point 21. The third switch valve 9, the fourth switch valve 10 and the third expansion valve 13 jointly control whether the first indoor heat exchanger 51 is connected to the compressor heat exchange circulation loop.

[0052] In some embodiments, the compressor heat exchange circulation loop includes a fourth expansion valve 14 connected between the compressor 4 and the first circuit heat exchanger 1 at one end and connected to the separator 6 at the other end to form a compressor self-loop. The fourth expansion valve 14 is used to convert part of the high-pressure refrigerant gas from the compressor 4 into low-pressure gas and send it into the separator 6, which helps to improve the pressure building rate of the compressor 4. Because the temperature of the refrigerant gas from the compressor 4 is high, the higher the temperature, the higher the gas pressure of the refrigerant gas, which can increase the gas pressure of the refrigerant gas entering the compressor 4 from the separator 6. The compressor self-loop is used to control the flow of refrigerant in the compressor heat exchange circulation loop. Increasing the flow of refrigerant into the compressor self-loop can reduce the flow of refrigerant into the heat exchanger pipeline.

[0053] The electric drive heat exchange circulation loop is connected to the first interface 31, the second interface 32 and the third interface 33 of the multi-way valve 3, and the battery heat exchange circulation loop is connected to the fourth interface 34 and the fifth interface 35 of the multi-way valve 3. The electric drive heat exchange circulation loop and the battery heat exchange circulation loop have a flow of coolant, which is used as an intermediate medium for heat exchange. Specifically, the coolant can be water. The coolant in the electric drive heat exchange circulation loop flows into the multi-way valve 3 from the first interface 31 and then flows out from the second interface 32 and the third interface 33. The coolant in the battery heat exchange circulation loop flows into the multi-way valve 3 from the fourth interface 34 and then flows out from the fifth interface 35. Each interface of the multi-way valve 3 can be controlled to be on or off.

[0054] In some embodiments, the electric drive heat exchange circulation loop comprises a first three-way valve 25 and a first water pump 26, one end of the first circuit heat exchanger 1 is connected to the first interface 31, the other end of the first circuit heat exchanger 1 is connected to the first end of the first three-way valve 25, the second end of the first three-way valve 25 is connected between the first circuit heat exchanger 1 and the first interface 31, the third end of the first three-way valve 25 is connected to one end of the electric drive assembly 24, the other end of the electric drive assembly 24 is connected to one end of the first water pump 26, the other end of the first water pump 26 is connected to the second interface 32.

[0055] The first water pump 26 enables the flow of the coolant in the electric drive heat exchange circulation loop, the first water pump 26 enables the flow of the coolant from the electric drive assembly 24 to the first three-way valve 25 in the electric drive heat exchange circulation loop, the coolant flows from the first interface 31 into the multi-way valve 3 and flows out from the second interface 32. For the convenience of description, the first end, the second end and the third end of the first three-way valve 25 are temporarily denoted as Q end, W end and E end respectively, and the following description uses these names. The first three-way valve 25 can control the heat exchange rate of the first circuit heat exchanger 1 and the compressor heat exchange circulation loop, by controlling the opening degree of the Q end, the flow rate of the coolant flowing from the Q end to the E end can be controlled, that is, the flow rate of the coolant in the electric drive heat exchange circulation loop in the first circuit heat exchanger 1 is controlled, thereby the heat exchange rate is controlled. When the Q end is completely closed, the coolant flows from the E end to the W end, and then flows from the W end to the first interface 31, at the same time, under the suction of the first water pump 26, the coolant flowing out of the W end is sucked to the first interface 31, so that the coolant flowing out of the W end basically does not flow back to the first circuit heat exchanger 1, thereby the electric drive heat exchange circulation loop and the compressor heat exchange circulation loop do not exchange heat. It can be understood that when the W end is completely closed and the Q end and the E end are completely opened, the coolant flows through the first circuit heat exchanger 1, at this time, the heat exchange rate is the largest, and the opening degrees of the Q end, the W end and the E end can be adjusted.

[0056] The electric drive heat exchange circulation loop further comprises a low-temperature radiator 27, one end of the low-temperature radiator 27 is connected between the first water pump 26 and the second interface 32, the other end of the low-temperature radiator 27 is connected to the third interface 33. The low-temperature radiator 27 is used for heat exchange between the electric drive heat exchange circulation loop and the outdoor, which is mainly used when the heat management system cools and dissipates heat, to assist the electric drive heat exchange circulation loop and the compressor heat exchange circulation loop to dissipate heat. It should be noted that when the heat management system cools, the compressor heat exchange circulation loop not only exchanges heat with the outdoor through the outdoor heat exchanger 50 to dissipate heat, but also transfers heat to the electric drive heat exchange circulation loop through the first circuit heat exchanger 1, and then exchanges heat with the outdoor through the low-temperature radiator 27 to dissipate heat, thereby improving the heat dissipation efficiency and cooling effect of the compressor heat exchange circulation loop. The compressor heat exchange circulation loop is provided with a cooling fan 23 to continuously introduce outdoor air to the surface of the low-temperature radiator 27 and the outdoor heat exchanger 50 to exchange heat.

[0057] In some embodiments, the thermal management system comprises a second circuit heat exchanger 2, the battery heat exchange circulation loop comprises a second water pump 29 and a second three-way valve 30, one end of the second circuit heat exchanger 2 is connected to one end of the power battery 28, the other end of the power battery 28 is connected to the fourth interface 34, the other end of the second circuit heat exchanger 2 is connected to the first end of the second three-way valve 30, the second end of the second three-way valve 30 is connected between the power battery 28 and the second circuit heat exchanger 2, and the third end of the second three-way valve 30 is connected to one end of the second water pump 29, and the other end of the second water pump 29 is connected to the fifth interface 35.

[0058] Like the electric drive heat exchange circulation loop, the battery heat exchange circulation loop has a coolant, the second water pump 29 circulates the coolant, and the coolant flows into the fourth interface 34 and flows out of the fifth interface 35. The second three-way valve 30 is used to control the circulation rate of the coolant and whether the second circuit heat exchanger 2 is connected to the battery heat exchange circulation loop. For the convenience of description, the first end, the second end and the third end of the second three-way valve 30 are temporarily denoted as U end, I end and O end respectively, and the following description uses these names. When the U end is closed and the I end and the O end are opened, the second circuit heat exchanger 2 is not connected to the battery heat exchange circulation loop, and the opening degrees of the U end, the I end and the O end can be adjusted.

[0059] The thermal management system of the utility model can switch between different pipelines to work in different modes:

[0060] In some embodiments, the thermal management system works in the first operating mode: passenger compartment heating + power battery 28 heating mode (can absorb the waste heat of the electric drive assembly 24 to heat the power battery 28).

[0061] Referring to Figure 2 , Figure 2 is an embodiment structure schematic diagram of the thermal management system provided by the application working in the first operating mode. When the vehicle works in a low-temperature environment, the third interface 33 of the multi-way valve 3 is disconnected to disconnect the low-temperature radiator 27 from the electric drive heat exchange circulation loop, the U end of the second three-way valve 30 is disconnected, and the second circuit heat exchanger 2 is not connected to the battery heat exchange circulation loop. The coolant in the electric drive heat exchange circulation loop flows into the first interface 31 and flows out of the second interface 32. The coolant in the battery heat exchange circulation loop flows into the fourth interface 34 and flows out of the fifth interface 35. The coolant in the electric drive heat exchange circulation loop and the coolant in the battery heat exchange circulation loop can be mixed and heat exchanged in the multi-way valve 3, so that the heat of the electric drive assembly 24 can be absorbed to heat the power battery 28, and the power battery 28 can indirectly absorb heat from the compressor heat exchange circulation loop through the electric drive heat exchange circulation loop.

[0062] In this mode, the compressor heat exchange cycle refrigerant flows through the compressor 4, the first circuit heat exchanger 1, the second connection point 16, the second indoor heat exchanger 52, the seventh connection point 21, the fourth connection point 18, the first connection point 15, the outdoor heat exchanger 50, the fifth connection point 19, the sixth connection point 20, the third connection point 17, the separator 6, and finally the refrigerant returns to the compressor 4 to form a cycle, at this time the outdoor heat exchanger 50 absorbs heat from the outside, and the second indoor heat exchanger 52 heats the passenger compartment. It should be noted that when the power battery 28 is heated to a certain extent and does not need to be continuously heated, the multi-way valve 3 can be controlled to operate independently between the first interface 31 and the second interface 32 and the fourth interface 34 and the fifth interface 35, the electric drive heat exchange cycle and the battery heat exchange cycle are disconnected, and the Q end of the first three-way valve 25 is disconnected to disconnect the electric drive heat exchange cycle and the compressor heat exchange cycle.

[0063] In some embodiments, referring to Figure 3 , Figure 3 is another embodiment structure schematic diagram of the thermal management system provided by the present application working in the first operating mode. The first three-way valve 25 can be cancelled, and the electric drive heat exchange cycle continuously exchanges heat with the compressor 4 heat exchange cycle, and the heat exchange rate is not adjustable.

[0064] In some embodiments, the thermal management system works in the second operating mode: passenger compartment heating + power battery 28 heating mode (which can absorb the waste heat of the electric drive assembly 24 to heat the power battery 28, and the compressor heat exchange cycle uses the compressor self-loop to heat in the form of the compressor 4 self-heating).

[0065] Referring to Figure 4 , Figure 4 is an embodiment structure schematic diagram of the thermal management system provided by the present application working in the second operating mode. In this mode, the electric drive heat exchange cycle and the battery heat exchange cycle are in the same communication state as in the first operating mode, and will not be described again; the compressor heat exchange cycle refrigerant flows through the compressor 4, the first circuit heat exchanger 1, the second connection point 16, the second indoor heat exchanger 52, the seventh connection point 21, the fourth connection point 18, the second circuit heat exchanger 2, the separator 6, and finally the refrigerant returns to the compressor 4 to form a cycle, and the compressor self-loop is connected at the same time.

[0066] In other embodiments, referring to Figure 5 , Figure 5 is another embodiment structure schematic diagram of the thermal management system provided by the present application working in the second operating mode. The second three-way valve 30 can also be cancelled, and the battery heat exchange cycle is always exchanged with the second circuit heat exchanger 2 and the compressor heat exchange cycle.

[0067] This mode is suitable for the case that the outdoor ambient temperature is extremely low, the ambient temperature is close to or exceeds the lower limit of the working temperature of the compressor 4, the heating effect of the refrigerant and the compressor heat exchange circulation loop is extremely poor or stops working due to the influence of the ambient temperature, at this time, the refrigerant does not flow to the outdoor heat exchanger 50 to absorb heat from the outdoor, and the refrigerant directly returns to the compressor 4 after releasing heat to the passenger cabin through the second indoor heat exchanger 52, and the compressor 4 works to generate heat.

[0068] In order to facilitate the work of the compressor 4, in the initial stage of heating, the fourth expansion valve 14 is used to make part of the refrigerant sucked from the outlet end of the compressor 4 return to the separator 6, so as to improve the temperature of the refrigerant entering the compressor 4 from the separator 6, and ensure the normal work of the compressor 4. If the refrigerant flowing out of the compressor 4 is all flowed to the second indoor heat exchanger 52 to release heat to the passenger cabin in the initial stage of heating, because the ambient temperature is extremely low, it leads to a large amount of heat exchange of the refrigerant in the second indoor heat exchanger 52, so that the temperature of the refrigerant flowing back to the separator 6 is too low, and the compressor 4 is difficult to convert it into high-pressure and high-temperature gas. When the heating is gradually stabilized, the opening of the fourth expansion valve 14 can be reduced again, and the compressor self-loop forms a self-feedback mechanism of the compressor heat exchange circulation loop, which ensures the normal work of the compressor 4, so that the thermal management system can ensure good heating effect even at extremely low ambient temperature.

[0069] In some embodiments, the thermal management system works in a third operating mode: passenger cabin refrigeration + power battery 28 cooling + electric drive assembly 24 cooling mode (the compressor heat exchange circulation loop dissipates heat for the power battery 28, and the low-temperature heat sink 27 dissipates heat for the electric drive heat exchange circulation loop and the compressor heat exchange circulation loop).

[0070] Referring to Figure 6 , Figure 6 is a structural schematic diagram of an embodiment of the thermal management system provided by the present application in the third operating mode. In this mode, the carrier refrigerant in the electric drive heat exchange circulation loop flows into the multi-way valve 3 from the first interface 31, flows out of the multi-way valve 3 from the third interface 33, and the second interface 32 is closed. The low-temperature heat sink 27 is connected to the electric drive heat exchange circulation loop to dissipate heat for it. It should be noted that the low-temperature heat sink 27 also dissipates heat for the compressor heat exchange circulation loop, and the compressor heat exchange circulation loop transmits heat to the electric drive heat exchange circulation loop through the first loop heat sink, and the low-temperature heat sink 27 dissipates heat for the electric drive heat exchange circulation loop. The carrier refrigerant in the battery heat exchange circulation loop still flows into the multi-way valve 3 from the fourth interface 34 and flows out from the fifth interface 35. The U end and the O end of the second three-way valve 30 are opened, and the opening of the I end is adjusted as needed.

[0071] In this mode, the compressor heat exchange cycle loop refrigerant flows through the compressor 4, the first loop heat exchanger 1, the second connection point 16, the first connection point 15, the outdoor heat exchanger 50, the fifth connection point 19, and the seventh connection point 21 in sequence. The refrigerant flows to the seventh connection point 21 and is divided into two paths. One path flows to the first indoor heat exchanger 51, the sixth connection point 20, the third connection point 17, and the separator 6 in sequence. The other path flows to the fourth connection point 18, the second loop heat exchanger 2, the third connection point 17, and the separator 6 in sequence. Finally, the refrigerant enters the compressor 4 from the separator 6 to form a cycle loop. At this time, the first indoor heat exchanger 51 cools the passenger compartment, the second loop heat exchanger 2 cools the battery heat exchange cycle loop, and the outdoor heat exchanger 50 dissipates heat to the outside.

[0072] In some embodiments, the thermal management system works in a fourth operating mode: passenger compartment cooling and dehumidification + power battery 28 cooling + electric drive assembly 24 cooling mode (the compressor heat exchange cycle loop cools and dehumidifies the passenger compartment, and the low-temperature radiator 27 dissipates heat for the electric drive heat exchange cycle loop and the battery heat exchange cycle loop).

[0073] Referring to Figure 7 , Figure 7 is an embodiment structure schematic diagram of the thermal management system provided by the present application working in the fourth operating mode. In this mode, the electric drive heat exchange cycle loop refrigerant flows from the first interface 31 into the multi-way valve 3, then flows from the fifth interface 35 into the battery heat exchange cycle loop, then flows from the fourth interface 34 into the multi-way valve 3, and finally flows from the third interface 33 into the low-temperature radiator 27. The refrigerant flows back to the first water pump 26 from the low-temperature radiator 27, and the second interface 32 is disconnected, that is, the electric drive heat exchange cycle loop and the battery heat exchange cycle loop form a loop together.

[0074] In this mode, the compressor heat exchange cycle refrigerant flows through the compressor 4, the first circuit heat exchanger 1, the second connection point 16 in turn, and the refrigerant is divided into two ways from the second connection point 16 to the seventh connection point 21, one way through the second indoor heat exchanger 52 to the seventh connection point 21, and the other way to the first connection point 15, the outdoor heat exchanger 50, the fifth connection point 19, the seventh connection point 21 in turn, and then from the seventh connection point 21 to the first indoor heat exchanger 51, the sixth connection point 20, the third connection point 17, the separator 6 in turn, and finally into the compressor 4 by the separator 6 to form a cycle. At this time, the outdoor heat exchanger 50 releases heat to the outside, the first indoor heat exchanger 51 acts as an evaporator to absorb heat from the passenger compartment, and the water vapor in the air of the passenger compartment is condensed by the first indoor heat exchanger 51 to form water droplets attached to its surface and carried away, thereby realizing the function of refrigeration and dehumidification. In order to further improve the dehumidification effect, the second indoor heat exchanger 52 releases heat to heat the air to a certain extent, thereby reducing the water vapor content in a unit volume, i.e. reducing the humidity. It should be noted that the refrigerant flow into the second indoor heat exchanger 52 cannot be too much, i.e. cannot release too much heat, so as to avoid affecting the refrigeration and dehumidification effect of the first indoor heat exchanger 51; the first switch valve 7 and the second switch valve 8 can be controlled to make a small part of the high-temperature refrigerant from the compressor 4 flow to the second indoor heat exchanger 52, and most of the high-temperature refrigerant flows into the outdoor heat exchanger 50 to release heat to the outside.

[0075] It can be understood that the working mode of the above-mentioned heat management system is only for some preferred embodiments, and the heat management system of the present application can also reasonably switch the connection mode of the pipeline to obtain other working modes.

[0076] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A thermal management system, characterized in that: The thermal management system includes a compressor heat exchange circulation loop, an electric drive heat exchange circulation loop, a battery heat exchange circulation loop, a first circuit heat exchanger and a multi-way valve. The compressor heat exchange circulation loop includes a compressor and a heat exchanger assembly that are interconnected. The electric drive heat exchange circulation loop includes an electric drive assembly. The battery heat exchange circulation loop includes a power battery. The power battery is connected to the electric drive assembly through the multi-way valve. The multi-way valve is configured to turn on or off the electric drive heat exchange circulation loop and the battery heat exchange circulation loop. The compressor heat exchange circulation loop is connected to the electric drive heat exchange circulation loop or the battery heat exchange circulation loop through the first circuit heat exchanger.

2. The thermal management system according to claim 1, characterized in that The thermal management system further includes a second-loop heat exchanger, the compressor heat exchange circulation loop includes a separator and a heat exchanger pipeline formed by the heat exchanger assembly, the compressor, the first-loop heat exchanger, the second-loop heat exchanger, and the separator are sequentially connected to form an external loop, and the second-loop heat exchanger connects the external loop with the battery heat exchange circulation loop; The heat exchanger pipeline and the external circuit form a first connection point, a second connection point, a third connection point and a fourth connection point, the first connection point is located on the pipeline between the first circuit heat exchanger and the second circuit heat exchanger, the second connection point is located between the first circuit heat exchanger and the first connection point, the third connection point is located on the pipeline between the separator and the second circuit heat exchanger, and the fourth connection point is located on the pipeline between the first connection point and the second circuit heat exchanger.

3. The thermal management system according to claim 2, characterized in that: The heat exchanger assembly includes an outdoor heat exchanger, a first indoor heat exchanger, and a second indoor heat exchanger. The heat exchanger pipeline has a fifth connection point, a sixth connection point, and a seventh connection point. The outdoor heat exchanger is connected between the first connection point and the fifth connection point. The first indoor heat exchanger is arranged on the pipeline between the sixth connection point and the seventh connection point. The sixth connection point is connected to the third connection point. The seventh connection point is respectively connected to the fourth connection point and the fifth connection point. The second indoor heat exchanger is arranged on the pipeline between the second connection point and the seventh connection point. The fifth connection point is connected to the sixth connection point.

4. The thermal management system according to claim 2, characterized in that: A first switch valve is provided between the first connection point and the second connection point on the external circuit, a first expansion valve is provided between the first connection point and the fourth connection point, and a second expansion valve is provided between the fourth connection point and the second circuit heat exchanger.

5. The thermal management system according to claim 3, characterized in that: A second switch valve is provided on the pipeline between the second connection point and the second indoor heat exchanger, a third switch valve is provided on the pipeline between the fifth connection point and the sixth connection point, a fourth switch valve is provided between the fifth connection point and the seventh connection point, and a third expansion valve is provided on the pipeline between the seventh connection point and the first indoor heat exchanger.

6. The thermal management system according to any one of claims 2 to 5, characterized in that: The compressor heat exchange circulation loop includes a fourth expansion valve, one end of the fourth expansion valve is connected between the compressor and the first circuit heat exchanger, and the other end of the fourth expansion valve is connected to the separator to form a compressor self-loop.

7. The thermal management system according to any one of claims 1 to 5, characterized in that: The electric drive heat exchange circulation loop is connected to the first interface, the second interface and the third interface of the multi-way valve, and the battery heat exchange circulation loop is connected to the fourth interface and the fifth interface of the multi-way valve.

8. The thermal management system according to claim 7, characterized in that: The electric drive heat exchange circulation loop includes a first three-way valve and a first water pump, one end of the first loop heat exchanger is connected to the first interface, the other end of the first loop heat exchanger is connected to the first end of the first three-way valve, the second end of the first three-way valve is connected between the first loop heat exchanger and the first interface, the third end of the first three-way valve is connected to one end of the electric drive assembly, the other end of the electric drive assembly is connected to one end of the first water pump, and the other end of the first water pump is connected to the second interface.

9. The thermal management system according to claim 8, characterized in that: The electric drive heat exchange circulation loop also includes a low-temperature radiator, one end of the low-temperature radiator is connected between the first water pump and the second interface, and the other end of the low-temperature radiator is connected to the third interface.

10. The thermal management system according to claim 7, characterized in that: The thermal management system includes a second-circuit heat exchanger, and the battery heat exchange circulation loop includes a second water pump and a second three-way valve. One end of the second-circuit heat exchanger is connected to one end of the power battery, and the other end of the power battery is connected to the fourth interface. The other end of the second-circuit heat exchanger is connected to the first end of the second three-way valve, and the second end of the second three-way valve is connected between the power battery and the second-circuit heat exchanger. The third end of the second three-way valve is connected to one end of the second water pump, and the other end of the second water pump is connected to the fifth interface.

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