Thermal management system

Abstract

The utility model provides a thermal management system. Comprising a heat exchange loop, the heat exchange loop is provided with a heat exchange assembly, and the indoor heat exchange end of the heat exchange assembly is arranged in a space to be subjected to heat exchange; an electric drive structure is arranged on the electric drive cooling loop; the battery cooling loop is provided with a battery and a cooler which are connected with each other; the cooler is used for communicating with the heat exchange loop, so that cooling liquid in the cooler exchanges heat with a refrigerant in the heat exchange loop; the first heat exchange part, the heat exchange loop and the electric drive cooling loop are both used for being communicated with the first heat exchange part, so that a refrigerant in the heat exchange loop exchanges heat with cooling liquid in the electric drive cooling loop. According to the technical scheme provided by the utility model, the technical problem that waste heat in a heat management system in the prior art cannot be fully utilized can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a thermal management system technical field, specifically, relate to a kind of thermal management system. BACKGROUND

[0002] At present, in engineering machinery, especially in engineering machinery using electric power system, thermal management is an important link to ensure system performance and reliability. The existing thermal management system usually includes battery thermal management system, cab air conditioning system, electric drive system cooling system and hydraulic system cooling system. These systems often run independently, and heat or cool through PTC heater, compressor, cooling liquid pump, plate heat exchanger and other components.

[0003] However, the thermal management system in the prior art has the problem of low waste heat recovery rate. When the engineering machinery is running, the electric drive system and the hydraulic system will generate a large amount of waste heat. The existing thermal management system usually fails to fully recover and utilize these waste heat, resulting in waste of energy. For example, in winter low temperature environment, the cab needs to be heated to ensure the comfort of the driver, and using only air conditioning system to heat not only has high energy consumption, but also cannot effectively utilize the heat energy generated by other components in the system. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of thermal management system, to solve the technical problem that the thermal management system in the prior art is not fully utilized to the waste heat in the system.

[0005] In order to achieve the above purpose, according to one aspect of the utility model, a kind of thermal management system is provided, comprising:

[0006] Heat exchange circuit, heat exchange component is provided on heat exchange circuit, indoor heat exchange end of heat exchange component is arranged in the space to be heated;

[0007] Electric drive cooling circuit, electric drive structure is provided on electric drive cooling circuit;

[0008] Battery cooling circuit, battery and cooler connected with each other are provided on battery cooling circuit;Cooler is used to be communicated with heat exchange circuit, to make the cooling liquid in cooler and the refrigerant in heat exchange circuit exchange heat;

[0009] First heat exchange part, heat exchange circuit and electric drive cooling circuit are used to be communicated with first heat exchange part, to make the refrigerant in heat exchange circuit and the cooling liquid in electric drive cooling circuit exchange heat.

[0010] Further, the thermal management system further comprises:

[0011] Heat exchange branch, first heat exchange part is communicated with heat exchange branch, and heat exchange branch is selectively communicated with electric drive cooling circuit.

[0012] The hydraulic cooling circuit is provided with a hydraulic structure;

[0013] The second heat exchange member is connected with the heat exchange branch and the hydraulic cooling circuit, so that the cooling liquid in the heat exchange branch and the cooling liquid in the hydraulic cooling circuit are heat exchanged.

[0014] Further, the thermal management system further comprises:

[0015] The heat exchange branch is connected with the first heat exchange member;

[0016] The first three-way valve and the second three-way valve are arranged on the electric drive cooling circuit; the first interface of the first three-way valve is connected with the cooling liquid outlet of the electric drive structure, the second interface is connected with the heat exchange branch, and the third interface is connected with the first interface of the second three-way valve; the second interface of the second three-way valve is connected with the heat exchange branch, and the third interface is connected with the cooling liquid inlet of the electric drive structure.

[0017] Further, the thermal management system further comprises:

[0018] The electric drive cooling water pump is arranged on the electric drive cooling circuit and located between the first three-way valve and the cooling liquid outlet of the electric drive structure, and the rotation speed of the electric drive cooling water pump is adjustably arranged; and / or,

[0019] The radiator is arranged on the electric drive cooling circuit and located between the second three-way valve and the cooling liquid inlet of the electric drive structure, and the rotation speed of the fan of the radiator is adjustably arranged.

[0020] Further, the thermal management system further comprises:

[0021] The first connection branch and the third three-way valve are connected with the cooling liquid inlet of the battery at one end and the first interface of the third three-way valve at the other end; the second interface of the third three-way valve is connected with the cooling liquid outlet of the electric drive structure, and the third interface is connected with the cooling liquid inlet of the electric drive structure; and / or,

[0022] The second connection branch is connected with the cooling liquid outlet of the battery at one end and the cooling liquid inlet of the electric drive structure at the other end; and / or,

[0023] The fourth three-way valve is arranged on the battery cooling circuit, and the first interface of the fourth three-way valve is connected with the cooling liquid inlet of the battery, the second interface is connected with the cooler, and the third interface is connected with the electric drive cooling circuit.

[0024] Further, the heat exchange assembly comprises a compressor, an outdoor heat exchanger and an evaporator; the heat exchange circuit comprises a first flow path and a second flow path, the compressor is arranged on the first flow path, and the evaporator is arranged on the second flow path; the heat exchange circuit further comprises:

[0025] a third flow path, the outdoor heat exchanger is arranged on the third flow path, and the second flow path and the third flow path are selectively communicated with the first flow path, and the second flow path is selectively communicated with the third flow path;

[0026] a fourth flow path, a cooler is arranged to be communicated with the fourth flow path, and the first flow path and the third flow path are selectively communicated with the fourth flow path;

[0027] The heat exchange circuit has a first refrigeration mode, a second refrigeration mode and a third refrigeration mode; when the heat exchange circuit is in the first refrigeration mode, the first flow path, the third flow path and the second flow path are sequentially communicated, and the outlet of the second flow path is communicated with the first flow path; when the heat exchange circuit is in the second refrigeration mode, the first flow path, the third flow path and the fourth flow path are sequentially communicated, and the outlet of the fourth flow path is communicated with the first flow path; when the heat exchange circuit is in the third refrigeration mode, the first flow path and the third flow path are communicated, the inlet of the second flow path and the inlet of the fourth flow path are both communicated with the outlet of the third flow path, and the outlet of the second flow path and the outlet of the fourth flow path are both communicated with the first flow path.

[0028] Further, the heat exchange assembly comprises a compressor and an evaporator; the heat exchange circuit comprises a first flow path and a second flow path, the compressor is arranged on the first flow path, and the evaporator is arranged on the second flow path; the heat exchange circuit further comprises:

[0029] a fifth flow path, a first heat exchange member is arranged on the fifth flow path, and the first flow path and the second flow path are selectively communicated with the fifth flow path;

[0030] The heat exchange circuit has a first heating mode; when the heat exchange circuit is in the first heating mode, the first flow path, the second flow path and the fifth flow path are sequentially communicated, and the outlet of the fifth flow path is communicated with the first flow path.

[0031] Further, the heat exchange assembly comprises a compressor, an outdoor heat exchanger and an evaporator; the heat exchange circuit comprises a first flow path, a second flow path, a third flow path, a fourth flow path and a fifth flow path, the compressor is arranged on the first flow path, the evaporator is arranged on the second flow path, the outdoor heat exchanger is arranged on the third flow path, a first heat exchange member is arranged on the fifth flow path, the second flow path and the third flow path are selectively communicated with the first flow path, and the second flow path and the third flow path are selectively communicated with the fifth flow path; a cooler is arranged to be communicated with the fourth flow path, and the first flow path and the second flow path are selectively communicated with the fourth flow path; wherein:

[0032] The heat exchange circuit has a second heating mode; when the heat exchange circuit is in the second heating mode, the first flow path, the second flow path and the fourth flow path are sequentially communicated, and the outlet of the fourth flow path is communicated with the first flow path; and / or,

[0033] The heat exchange circuit has a heat recovery mode; when the heat exchange circuit is in the heat recovery mode, the first flow path, the third flow path, the fifth flow path and the second flow path are sequentially communicated, and the end of the second flow path away from the fifth flow path is communicated with the first flow path.

[0034] Further, the thermal management system further comprises:

[0035] A first expansion valve is arranged on the second flow path and located at the refrigerant inlet of the evaporator; the opening degree of the first expansion valve is adjustably arranged; and / or,

[0036] A second expansion valve is arranged on the fourth flow path and located at the refrigerant inlet of the cooler; the opening degree of the second expansion valve is adjustably arranged; and / or,

[0037] A third expansion valve is arranged on the fifth flow path and located at the refrigerant inlet of the first heat exchange member; the opening degree of the third expansion valve is adjustably arranged; and / or,

[0038] A fourth expansion valve is arranged on the second flow path and located at the refrigerant outlet of the evaporator; the opening degree of the fourth expansion valve is adjustably arranged.

[0039] Further, the thermal management system further comprises:

[0040] A first temperature detection member, a detection end of the first temperature detection member is arranged on the thermal management system and used for detecting the ambient temperature of the thermal management system; and / or,

[0041] A second temperature detection member, a detection end of the second temperature detection member is arranged on the battery and used for detecting the temperature of the battery; and / or,

[0042] A power detection member, a detection end of the power detection member is arranged on the battery and used for detecting the power of the battery.

[0043] The technical scheme of the utility model, through the integration of the electric drive cooling circuit and the battery cooling circuit, makes the system be able to flexibly absorb or release heat from multiple heat sources under different working conditions, thereby improving energy utilization efficiency.For example, under low temperature environment, the electric drive cooling circuit and the battery cooling circuit can jointly provide heat for the heat exchange circuit, while under high temperature environment, the heat exchange circuit can provide cooling effect for the battery, avoiding overheating.The effective heat exchange between the refrigerant and the coolant through the first heat exchange piece not only can stabilize the temperature of the electric drive system and the battery system, but also can ensure the temperature comfort of the cockpit, and even under extreme weather conditions, the stability of the heating performance can be maintained.In addition, the setting in the scheme can simplify the structure and control logic of the thermal management system, reduce the management complexity and reduce the installation space requirement.Therefore, through the technical scheme of the utility model, the technical problem that the thermal management system in the prior art is not fully utilized for the waste heat in the system can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0044] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description, explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0045] Figure 1 A structure schematic view of a thermal management system according to an embodiment of the present application is shown;

[0046] Figure 2 A structure schematic view of a thermal management system according to an embodiment of the present application in a first refrigeration mode is shown;

[0047] Figure 3 A structure schematic view of a thermal management system according to an embodiment of the present application in a second refrigeration mode is shown;

[0048] Figure 4 A structure schematic view of a thermal management system according to an embodiment of the present application in a third refrigeration mode is shown;

[0049] Figure 5 A structure schematic view of a thermal management system according to an embodiment of the present application, in which the heat exchange circuit is in a first heating mode and the battery is in communication with the electric drive cooling circuit, is shown;

[0050] Figure 6 A structure schematic view of a thermal management system according to an embodiment of the present application in a second heating mode is shown;

[0051] Figure 7 A structure schematic view of a thermal management system according to an embodiment of the present application, in which the heat exchange circuit is in a first heating mode and the battery cooling circuit is independent, is shown;

[0052] Figure 8 A structure schematic diagram of a heat management system in a heat recovery mode according to an embodiment of the present application is shown.

[0053] Among them, the above-mentioned drawings include the following reference signs:

[0054] 1, heat exchange circuit;

[0055] 11, first flow path; 12, second flow path; 13, third flow path; 14, fourth flow path; 15, fifth flow path;

[0056] 101, first expansion valve; 102, second expansion valve; 103, third expansion valve; 104, fourth expansion valve; 105, first stop valve; 106, second stop valve; 107, third stop valve; 108, fourth stop valve;

[0057] 2, electrically driven cooling circuit; 21, electrically driven structure; 22, electrically driven cooling water pump; 23, radiator;

[0058] 3, battery cooling circuit; 31, battery; 32, cooler; 33, battery cooling water pump;

[0059] 4, first heat exchange element;

[0060] 5, heat exchange branch;

[0061] 61, first three-way valve; 62, second three-way valve; 63, third three-way valve; 64, fourth three-way valve; 65, proportional valve;

[0062] 71, first connection branch; 72, second connection branch;

[0063] 8, compressor;

[0064] 9, outdoor heat exchanger;

[0065] 10, evaporator;

[0066] 20, hydraulic cooling circuit; 201, hydraulic structure; 202, pressure detection element; 203, hydraulic radiator;

[0067] 30, second heat exchange element;

[0068] 40, heater. DETAILED DESCRIPTION

[0069] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0070] As Figures 1 to 8The embodiment of the utility model provides a kind of thermal management system, and thermal management system includes heat exchange loop 1, electric drive cooling loop 2, battery cooling loop 3 and first heat exchange component 4.Heat exchange loop 1 is provided with heat exchange assembly, and the indoor heat exchange end of heat exchange assembly is arranged in the space to be heat exchanged.Electric drive cooling loop 2 is provided with electric drive structure 21.Battery cooling loop 3 is provided with mutually connected battery 31 and cooler 32;Cooler 32 is used to be communicated with heat exchange loop 1, to make the cooling liquid in cooler 32 and the refrigerant in heat exchange loop 1 heat exchange.Heat exchange loop 1 and electric drive cooling loop 2 are used to be communicated with first heat exchange component 4, to make the refrigerant in heat exchange loop 1 and the cooling liquid in electric drive cooling loop 2 heat exchange.

[0071] The embodiment of the utility model provides a kind of thermal management system, and thermal management system includes heat exchange loop 1, electric drive cooling loop 2, battery cooling loop 3 and first heat exchange component 4.Heat exchange loop 1 is provided with heat exchange assembly, and the indoor heat exchange end of heat exchange assembly is arranged in the space to be heat exchanged.Electric drive cooling loop 2 is provided with electric drive structure 21.Battery cooling loop 3 is provided with mutually connected battery 31 and cooler 32;Cooler 32 is used to be communicated with heat exchange loop 1, to make the cooling liquid in cooler 32 and the refrigerant in heat exchange loop 1 heat exchange.Heat exchange loop 1 and electric drive cooling loop 2 are used to be communicated with first heat exchange component 4, to make the refrigerant in heat exchange loop 1 and the cooling liquid in electric drive cooling loop 2 heat exchange.

[0072] Specifically, the space to be heat exchanged is a driver cabin. The thermal management system provided by the embodiment is suitable for a vehicle.

[0073] Specifically, the heat exchange assembly is an air conditioning assembly, and the indoor heat exchange end of the heat exchange assembly is an air conditioning indoor unit.

[0074] Specifically, the first heat exchange component 4 is a plate heat exchanger.

[0075] Specifically, the thermal management system further comprises a heat exchange branch 5, a hydraulic cooling circuit 20 and a second heat exchange member 30. The first heat exchange member 4 is in communication with the heat exchange branch 5, and the heat exchange branch 5 is in selective communication with the electric drive cooling circuit 2. The hydraulic cooling circuit 20 is provided with a hydraulic structure 201. The heat exchange branch 5 and the hydraulic cooling circuit 20 are both in communication with the second heat exchange member 30, so that the cooling liquid in the heat exchange branch 5 and the cooling liquid in the hydraulic cooling circuit 20 can exchange heat. With such a structure, the hydraulic cooling circuit 20 and the heat exchange branch 5 can exchange heat through the second heat exchange member 30, achieving the recovery and utilization of the waste heat of the hydraulic structure 201 and reducing the energy consumption of the whole vehicle.

[0076] Specifically, the thermal management system further comprises a heat exchange branch 5, a first three-way valve 61 and a second three-way valve 62. The first heat exchange member 4 is in communication with the heat exchange branch 5. The first three-way valve 61 and the second three-way valve 62 are arranged on the electric drive cooling circuit 2 in a spaced manner; the first interface of the first three-way valve 61 is used to communicate with the cooling liquid outlet of the electric drive structure 21, the second interface is used to communicate with the heat exchange branch 5, and the third interface is used to communicate with the first interface of the second three-way valve 62; the second interface of the second three-way valve 62 is used to communicate with the heat exchange branch 5, and the third interface is used to communicate with the cooling liquid inlet of the electric drive structure 21. With such a structure, the use of three-way valves for cooling liquid distribution reduces the number and complexity of valves required, simplifies the operation of the thermal management system, reduces the maintenance cost and failure rate of the system, and also makes the system design more compact, which is beneficial to saving the internal space of the vehicle.

[0077] In this embodiment, the thermal management system further comprises an electric drive cooling water pump 22. The electric drive cooling water pump 22 is arranged on the electric drive cooling circuit 2 and located between the first three-way valve 61 and the cooling liquid outlet of the electric drive structure 21, and the rotation speed of the electric drive cooling water pump 22 is adjustably arranged. With such a structure, the adjustability of the rotation speed of the electric drive cooling water pump 22 enables the system to accurately adjust the flow rate of the cooling liquid according to the real-time temperature demand of the electric drive structure 21, thereby realizing more efficient and adaptive heat management.

[0078] In this embodiment, the thermal management system further comprises a radiator 23. The radiator 23 is arranged on the electric drive cooling circuit 2 and located between the second three-way valve 62 and the cooling liquid inlet of the electric drive structure 21, and the rotation speed of the fan of the radiator 23 is adjustably arranged. In this way, by adjusting the rotation speed of the fan, the radiator 23 can reduce energy consumption at low load and increase heat dissipation at high load, thereby improving the efficiency and economy of the overall thermal management system.

[0079] Specifically, the thermal management system further comprises a first connecting branch 71 and a third three-way valve 63, one end of the first connecting branch 71 is in communication with the coolant inlet of the battery 31, and the other end is in communication with the first interface of the third three-way valve 63; the second interface of the third three-way valve 63 is used to communicate with the coolant outlet of the electric drive structure 21, and the third interface is used to communicate with the coolant inlet of the electric drive structure 21. With such a structure, the design of the first connecting branch 71 and the third three-way valve 63 enables the coolant of the battery 31 to circulate flexibly between the electric drive cooling circuit 2 and the battery cooling circuit 3, realizes heat exchange between the battery and the electric drive system, and improves energy utilization efficiency.

[0080] Specifically, the thermal management system further comprises a second connecting branch 72, one end of the second connecting branch 72 is in communication with the coolant outlet of the battery 31, and the other end is in communication with the coolant inlet of the electric drive structure 21. In this way, through the second connecting branch 72, the heat between the battery cooling circuit 3 and the electric drive cooling circuit 2 can be exchanged with each other, which helps to optimize energy balance under different working conditions, avoid energy waste, and improve endurance.

[0081] Specifically, the thermal management system further comprises a fourth three-way valve 64, which is arranged on the battery cooling circuit 3, and the first interface of the fourth three-way valve 64 is used to communicate with the coolant inlet of the battery 31, the second interface is used to communicate with the cooler 32, and the third interface is used to communicate with the electric drive cooling circuit 2. With such a structure, the fourth three-way valve 64 provides a heat energy exchange mechanism between the battery cooling circuit 3 and the electric drive cooling circuit 2, which helps to maintain the stable working temperature of the battery 31 and the electric drive structure 21, and avoids the performance degradation caused by overheating or overcooling.

[0082] In the embodiment, the heat exchange assembly includes a compressor 8, an outdoor heat exchanger 9, and an evaporator 10; the heat exchange circuit 1 includes a first flow path 11 and a second flow path 12, and the compressor 8 is arranged on the first flow path 11, and the evaporator 10 is arranged on the second flow path 12. In this way, the heat exchange assembly composed of the compressor 8, the outdoor heat exchanger 9, and the evaporator 10 can efficiently convert heat between the first flow path 11 and the second flow path 12 of the heat exchange circuit 1, whether it is absorbing heat from the outside or releasing internal heat to the environment, it can realize fast response and efficient conversion.

[0083] Specifically, the heat exchange circuit 1 also includes a third flow path 13 and a fourth flow path 14. The outdoor heat exchanger 9 is mounted on the third flow path 13. Both the second flow path 12 and the third flow path 13 are selectively connected to the first flow path 11, and the second flow path 12 is selectively connected to the third flow path 13. The cooler 32 is connected to the fourth flow path 14, and both the first flow path 11 and the third flow path 13 are selectively connected to the fourth flow path 14. Thus, by selectively connecting the second flow path 12, the third flow path 13, and the fourth flow path 14, the system can achieve multiple operating modes to adapt to the heat demands of different environmental conditions and vehicle operating states.

[0084] Specifically, the heat exchange circuit 1 has a first cooling mode, a second cooling mode, and a third cooling mode.

[0085] Specifically, when heat exchange circuit 1 is in the first cooling mode, the first flow path 11, the third flow path 13, and the second flow path 12 are connected in sequence, and the outlet of the second flow path 12 is connected to the first flow path 11. With this configuration, under conditions of high cooling demand, the first cooling mode can utilize the low temperature of the external environment to achieve efficient heat exchange through the outdoor heat exchanger 9, thereby reducing the overall energy consumption of the system and improving energy utilization efficiency.

[0086] like Figure 2 As shown in the figure, the thick lines indicate the circuits operating in the current mode. In the first cooling mode, the ambient temperature of the system provided in this embodiment is greater than or equal to 25°C. Controlling the first three-way valve 61, the second three-way valve 62, and the third three-way valve 63 causes the coolant in the electric drive cooling circuit 2 to flow from the outlet of the electric drive cooling water pump 22 through the first three-way valve 61, the second three-way valve 62, the third three-way valve 63, the radiator 23, and the electric drive structure 21 before returning to the inlet of the electric drive cooling water pump 22. The coolant in the battery cooling circuit 3 flows from the outlet of the battery cooling water pump 33 through the cooler 32 and the battery 31 before returning to the inlet of the battery cooling water pump 33. Heat exchange circuit 1 controls the opening of the first shut-off valve 105 and the second shut-off valve 106, and the closing of the third shut-off valve 107 and the fourth shut-off valve 108. If the cockpit has a cooling requirement and the battery 31 temperature is less than or equal to 35°C, the first expansion valve 101 is adjusted to cool the cockpit. The adjustment method of the first expansion valve 101 is superheat PID (proportional-integral-derivative) control.

[0087] Specifically, when the heat exchange circuit 1 is in the second cooling mode, the first flow path 11, the third flow path 13 and the fourth flow path 14 are sequentially communicated, and the outlet of the fourth flow path 14 is communicated with the first flow path 11. With such an arrangement, through the communication of the first flow path 11, the third flow path 13 and the fourth flow path 14, the outdoor heat exchanger 9 can absorb heat from the environment and release the heat to the coolant of the battery 31 through the cooler 32 for maintaining the battery 31 at a suitable working temperature.

[0088] As shown in FIG. 6, Figure 3 , Figure 3 FIG. 6 shows a schematic diagram of the structure of the thermal management system in the second cooling mode, and the thick line in the figure indicates the circuit running in the current mode. At this time, the ambient temperature of the system is greater than or equal to 25°C, there is no cooling demand in the cabin, and the battery 31 temperature is greater than 35°C. The first three-way valve 61, the second three-way valve 62 and the third three-way valve 63 are controlled to make the coolant in the electric drive cooling circuit 2 flow from the outlet of the electric drive cooling water pump 22, sequentially pass through the first three-way valve 61, the second three-way valve 62, the third three-way valve 63, the radiator 23 and the electric drive structure 21, and then return to the inlet of the electric drive cooling water pump 22. The coolant in the battery cooling circuit 3 flows from the outlet of the battery cooling water pump 33, passes through the cooler 32 and the battery 31, and then returns to the inlet of the battery cooling water pump 33. The heat exchange circuit 1 controls the first stop valve 105 and the second stop valve 106 to be opened, and the third stop valve 107 and the fourth stop valve 108 to be closed. The opening degree of the second expansion valve 102 is adjusted to cool the battery 31, and the adjustment mode of the second expansion valve 102 is the superheat degree PID control of the cooler 32.

[0089] Specifically, when the heat exchange circuit 1 is in the third cooling mode, the first flow path 11 and the third flow path 13 are communicated, the inlet of the second flow path 12 and the inlet of the fourth flow path 14 are both communicated with the outlet of the third flow path 13, and the outlet of the second flow path 12 and the outlet of the fourth flow path 14 are both communicated with the first flow path 11. With such an arrangement, in the third cooling mode, the heat exchange circuit 1 can provide cooling to the cabin and the battery 31 at the same time, and the communication between the first flow path 11, the third flow path 13 and the second flow path 12, the fourth flow path 14 allows the refrigerant to be flexibly distributed between the outdoor heat exchanger 9 and the evaporator 10 and between the coolers 32, so as to meet the cooling demands of different components.

[0090] As shown in FIG. 7, Figure 4 , Figure 4The structural schematic diagram of the heat management system in the third cooling mode is shown, and the thick line in the figure indicates the circuit running in the current mode. At this time, the ambient temperature of the system is greater than or equal to 25℃, the cabin has a cooling demand, and the battery 31 temperature is greater than 35℃. The first three-way valve 61, the second three-way valve 62, and the third three-way valve 63 are controlled to make the coolant in the electric drive cooling circuit 2 pass through the first three-way valve 61, the second three-way valve 62, the third three-way valve 63, the radiator 23, and the electric drive structure 21 in turn from the outlet of the electric drive cooling water pump 22 and return to the inlet of the electric drive cooling water pump 22. The coolant in the battery cooling circuit 3 passes through the cooler 32 and the battery 31 from the outlet of the battery cooling water pump 33 and returns to the inlet of the battery cooling water pump 33. The heat exchange circuit 1 controls the first stop valve 105 and the second stop valve 106 to be opened and the third stop valve 107 and the fourth stop valve 108 to be closed. The opening degrees of the first expansion valve 101 and the second expansion valve 102 are adjusted at the same time to cool the cabin through the evaporator 10 and cool the battery 31 through the cooler 32, respectively.

[0091] In the embodiment, the heat exchange assembly includes the compressor 8 and the evaporator 10; the heat exchange circuit 1 includes the first flow path 11 and the second flow path 12, the compressor 8 is arranged on the first flow path 11, and the evaporator 10 is arranged on the second flow path 12. The first flow path 11 and the second flow path 12 are selectively communicated. The heat exchange circuit 1 further includes the fifth flow path 15, and the first heat exchange member 4 is arranged on the fifth flow path 15. The first flow path 11 and the second flow path 12 are selectively communicated with the fifth flow path 15. With such an arrangement, the first heat exchange member 4 on the fifth flow path 15 can absorb the heat in the electric drive cooling circuit 2 and the battery cooling circuit 3 and convert it into energy that can be used for heating, such as providing heating for the cabin in a low-temperature environment, thereby realizing the recycling and efficient use of heat energy.

[0092] Specifically, the heat exchange circuit 1 has a first heating mode; when the heat exchange circuit 1 is in the first heating mode, the first flow path 11, the second flow path 12, and the fifth flow path 15 are sequentially communicated, and the outlet of the fifth flow path 15 is communicated with the first flow path 11. In this way, in the first heating mode, through the communication of the outdoor heat exchanger 9 and the first heat exchange member 4, the system can efficiently heat in a low-temperature environment, improve the heating effect of the cabin, and enable the driver to maintain a comfortable working state in cold weather. At the same time, the battery 31 is preheated, the battery performance is improved, and the battery life is prolonged.

[0093] As shown in Figure 5 , the heat exchange circuit 1 has a second heating mode; when the heat exchange circuit 1 is in the second heating mode, the first flow path 11, the second flow path 12, and the fifth flow path 15 are sequentially communicated, and the outlet of the fifth flow path 15 is communicated with the second flow path 12. In this way, in the second heating mode, through the communication of the outdoor heat exchanger 9 and the first heat exchange member 4, the system can efficiently heat in a low-temperature environment, improve the heating effect of the cabin, and enable the driver to maintain a comfortable working state in cold weather. At the same time, the battery 31 is preheated, the battery performance is improved, and the battery life is prolonged. Figure 5A structure schematic diagram of the heat exchange circuit 1 in the first heating mode and the battery 31 in communication with the electric drive cooling circuit 2 is shown, and the thick line in the figure indicates the circuit running in the current mode. At this time, the ambient temperature of the system is less than or equal to 10℃, and the cabin has a heating demand. The first three-way valve 61, the second three-way valve 62, the third three-way valve 63, the fourth three-way valve 64 and the proportional valve 65 are controlled to make the coolant flow from the outlet of the electric drive cooling water pump 22 to the first three-way valve 61, the second heat exchange element 30, the first heat exchange element 4, the second three-way valve 62, the third three-way valve 63, the fourth three-way valve 64, the battery 31, the battery cooling water pump 33, the proportional valve 65 and the electric drive structure 21 in turn and then return to the inlet of the electric drive cooling water pump 22, and the battery 31 is in series mode with the electric drive cooling circuit 2. The electric drive cooling circuit 2 is in communication with the first heat exchange element 4, and the electric drive cooling circuit 2 is in communication with the second heat exchange element 30. The heat exchange circuit 1 controls the first shut-off valve 105 and the third shut-off valve 107 to be closed, the second shut-off valve 106 and the fourth shut-off valve 108 to be opened, the second expansion valve 102 and the fourth expansion valve 104 to be closed, and the first expansion valve 101 to be fully opened, and the third expansion valve 103 is adjusted to absorb heat from the coolant in the series circuit of the battery 31 and the electric drive cooling circuit 2 by the first heat exchange element 4 for cabin heating. At the same time, such a setting can heat the battery 31 by the coolant in the series circuit of the battery 31 and the electric drive cooling circuit 2, so as to facilitate the normal operation of the battery 31.

[0094] As Figure 7 shown, Figure 7 A structure schematic diagram of the heat exchange circuit 1 in the first heating mode and the battery cooling circuit independent is shown, and the thick line in the figure indicates the circuit running in the current mode. At this time, the ambient temperature of the system is less than or equal to 10℃, the cabin has a heating demand, and the temperature of the thermal management system itself is less than or equal to 10℃. The first three-way valve 61, the second three-way valve 62 and the third three-way valve 63 are controlled to make the coolant flow from the outlet of the electric drive cooling water pump 22 to the first three-way valve 61, the second heat exchange element 30, the first heat exchange element 4, the second three-way valve 62, the third three-way valve 63, the radiator 23 and the electric drive structure 21 in turn and then return to the inlet of the electric drive cooling water pump 22. The coolant in the battery cooling circuit 3 flows from the outlet of the battery cooling water pump 33 to the cooler 32, the fourth three-way valve 64, the battery 31 and then returns to the inlet of the battery cooling water pump 33. The heat exchange circuit 1 controls the first shut-off valve 105 and the third shut-off valve 107 to be closed, the second shut-off valve 106 and the fourth shut-off valve 108 to be opened, the second expansion valve 102 and the fourth expansion valve 104 to be closed, and the first expansion valve 101 to be fully opened, and the third expansion valve 103 is adjusted to absorb heat from the coolant in the electric drive cooling circuit 2 and the second heat exchange element 30 by the first heat exchange element 4 for cabin heating.

[0095] Specifically, the opening temperature threshold of the fan of the radiator 23 (the temperature at the cooling liquid inlet of the radiator 23 is less than or equal to 0℃) is adjusted, and the rotation speed of the fan is in linear relationship with the temperature at the cooling liquid inlet of the radiator 23, the lower the temperature at the cooling liquid inlet of the radiator 23, the greater the rotation speed of the fan. The higher the temperature at the cooling liquid inlet of the radiator 23, the smaller the rotation speed of the fan. The opening degree of the third expansion valve 103 is controlled, and the heat from the environment is absorbed by the first heat exchange member 4 and the radiator 23 for cabin heating.

[0096] In the embodiment, the heat exchange assembly includes the compressor 8, the outdoor heat exchanger 9 and the evaporator 10; the heat exchange circuit 1 includes the first flow path 11, the second flow path 12, the third flow path 13, the fourth flow path 14 and the fifth flow path 15, the compressor 8 is arranged on the first flow path 11, the evaporator 10 is arranged on the second flow path 12, the outdoor heat exchanger 9 is arranged on the third flow path 13, the first heat exchange member 4 is arranged on the fifth flow path 15, the second flow path 12 and the third flow path 13 are selectively communicated with the first flow path 11, the second flow path 12 and the third flow path 13 are selectively communicated with the fifth flow path 15; the cooler 32 is used for being communicated with the fourth flow path 14, the first flow path 11 and the second flow path 12 are selectively communicated with the fourth flow path 14. With such arrangement, the heat exchange circuit 1 can flexibly distribute the refrigerant according to different operation modes and working condition requirements through the selective communication of the first flow path 11, the second flow path 12, the third flow path 13, the fourth flow path 14 and the fifth flow path 15, so as to meet the requirements of different working conditions.

[0097] Specifically, the heat exchange circuit 1 has a second heating mode; when the heat exchange circuit 1 is in the second heating mode, the first flow path 11, the second flow path 12 and the fourth flow path 14 are sequentially communicated, and the outlet of the fourth flow path 14 is communicated with the first flow path 11.

[0098] As Figure 6 shown, Figure 6The structure schematic diagram of the heat management system in the second heating mode is shown, and the thick line in the figure indicates the circuit running in the current mode. At this time, the ambient temperature of the system is less than or equal to 10℃, the cabin has heating demand, and the temperature of the battery 31 is greater than or equal to 45℃. The first three-way valve 61, the second three-way valve 62, and the third three-way valve 63 are controlled to make the cooling liquid from the outlet of the electric drive cooling water pump 22 pass through the first three-way valve 61, the second heat exchange element 30, the first heat exchange element 4, the second three-way valve 62, the third three-way valve 63, the radiator 23, and the electric drive structure 21 in turn and then return to the inlet of the electric drive cooling water pump 22. The cooling liquid in the battery cooling circuit 3 passes through the cooler 32, the fourth three-way valve 64, and the battery 31 from the outlet of the battery cooling water pump 33 and then returns to the inlet of the battery cooling water pump 33. The heat exchange circuit 1 controls the first stop valve 105 and the third stop valve 107 to be closed, the second stop valve 106 and the fourth stop valve 108 to be opened, the third expansion valve 103 and the fourth expansion valve 104 to be closed, and the first expansion valve 101 to be fully opened. The second expansion valve 102 and the fourth three-way valve 64 are adjusted to absorb heat from the cooling liquid of the battery cooling circuit 3 by the cooler 32 for cabin heating, and the heat stored in the battery 31 is recovered for cabin heating.

[0099] Specifically, when the heat management system is in the second heating mode, when the low-temperature battery 31 is charging, by monitoring the remaining power of the battery 31, the cooling power of the battery 31 is reduced when the charging is about to be completed, and the temperature of the battery 31 is controlled to be greater than or equal to 45℃ and less than or equal to 50℃.

[0100] Specifically, the heat exchange circuit 1 has a heat recovery mode; when the heat exchange circuit 1 is in the heat recovery mode, the first flow path 11, the third flow path 13, the fifth flow path 15, and the second flow path 12 are sequentially communicated, and the end of the second flow path 12 away from the fifth flow path 15 is communicated with the first flow path 11. With such a setting, the excess heat in the cabin is recovered and stored in the electric drive cooling circuit 2 through the communication of the first flow path 11, the third flow path 13, the fifth flow path 15, and the second flow path 12, so as to be used again subsequently.

[0101] As shown in Figure 8 , the heat exchange circuit 1 has a heat recovery mode; when the heat exchange circuit 1 is in the heat recovery mode, the first flow path 11, the third flow path 13, the fifth flow path 15, and the second flow path 12 are sequentially communicated, and the end of the second flow path 12 away from the fifth flow path 15 is communicated with the first flow path 11. With such a setting, the excess heat in the cabin is recovered and stored in the electric drive cooling circuit 2 through the communication of the first flow path 11, the third flow path 13, the fifth flow path 15, and the second flow path 12, so as to be used again subsequently. Figure 8The structure schematic diagram of the heat management system in the heat recovery mode is shown, and the thick line in the figure indicates the circuit running in the current mode. At this time, the working machine ends work, and the temperature of the cab is greater than or equal to the preset recovery temperature. The first three-way valve 61, the second three-way valve 62 and the third three-way valve 63 are controlled to make the cooling liquid return to the inlet of the electric drive cooling water pump 22 from the outlet of the electric drive cooling water pump 22 in turn through the first three-way valve 61, the second heat exchange element 30, the first heat exchange element 4, the second three-way valve 62, the third three-way valve 63, the radiator 23 and the electric drive structure 21. The cooling liquid in the battery cooling circuit 3 returns to the inlet of the battery cooling water pump 33 from the outlet of the battery cooling water pump 33 through the cooler 32, the fourth three-way valve 64 and the battery 31. The heat exchange circuit 1 controls the first stop valve 105 and the third stop valve 107 to be opened, the second stop valve 106 and the fourth stop valve 108 to be closed, the first expansion valve 101 and the second expansion valve 102 to be closed, the third expansion valve 103 to be fully opened, and the fourth expansion valve 104 to be adjusted, so that the heat in the cab is recovered and stored in the electric drive cooling circuit 2 through the first heat exchange element 4, to facilitate the reuse of the heat when the cab needs heating.

[0102] Specifically, the heat management system further comprises a first expansion valve 101, which is arranged on the second flow path 12 and located at the refrigerant inlet of the evaporator 10; the opening degree of the first expansion valve 101 is adjustably arranged. With such a structural arrangement, by adjusting the opening degree of the first expansion valve 101, the system can accurately adjust the evaporation speed and pressure of the refrigerant according to the actual heat load demand, thereby avoiding energy waste and improving the overall energy efficiency ratio of the system.

[0103] Specifically, the heat management system further comprises a second expansion valve 102, which is arranged on the fourth flow path 14 and located at the refrigerant inlet of the cooler 32; the opening degree of the second expansion valve 102 is adjustably arranged. With such a structural arrangement, the second expansion valve 102 is located at the refrigerant inlet of the cooler 32, and the adjustably arranged opening degree of the second expansion valve 102 helps to accurately control the refrigerant flow passing through the cooler 32, thereby adjusting the temperature of the cooling liquid and ensuring that the battery system works in an appropriate temperature range.

[0104] Specifically, the heat management system further comprises a third expansion valve 103, which is arranged on the fifth flow path 15 and located at the refrigerant inlet of the first heat exchange element 4, and the opening degree of the third expansion valve 103 is adjustably arranged. With such a structural arrangement, by controlling the opening degree of the third expansion valve 103, the refrigerant flow passing through the first heat exchange element 4 can be affected, and then the heat transferred to the cab through the first heat exchange element 4 is affected, thereby realizing accurate adjustment of the temperature of the cab.

[0105] Specifically, the heat management system further comprises a fourth expansion valve 104, which is arranged on the second flow path 12 and at the refrigerant outlet of the evaporator 10; the opening degree of the fourth expansion valve 104 is adjustably arranged. With such a structural arrangement, the fourth expansion valve 104 is arranged at the refrigerant outlet of the evaporator 10, and the adjustably arranged opening degree thereof can further optimize the refrigeration cycle, ensure that the refrigerant state out of the evaporator 10 is appropriate, avoid excessively high or low refrigerant pressure, and improve the refrigeration efficiency.

[0106] Specifically, the adjustment mode of the first expansion valve 101 and the second expansion valve 102 is dynamic control according to the ratio between the cabin temperature difference (the difference between the actual temperature of the cabin and the expected temperature of the cabin) and the battery waterway temperature difference (the difference between the actual temperature of the cooling liquid of the battery cooling circuit 3 and the expected temperature thereof), when the cabin temperature difference is greater than the battery waterway temperature difference, the opening degree of the first expansion valve 101 is greater than that of the second expansion valve 102; when the cabin temperature difference is less than the battery waterway temperature difference, the opening degree of the first expansion valve 101 is less than that of the second expansion valve 102; when the cabin temperature difference is equal to the battery waterway temperature difference, the opening degree of the first expansion valve 101 is equal to that of the second expansion valve 102.

[0107] In the embodiment, the heat management system further comprises a first temperature detection member, a detection end of the first temperature detection member is arranged on the heat management system and is used for detecting the ambient temperature of the heat management system. With such a structural arrangement, the first temperature detection member can monitor the temperature of the environment where the heat management system is located in real time, which is the basis for the system to select the operation mode (such as refrigeration or heating) and adjust the heat exchange efficiency, ensuring that the heat management system can respond to changes in the external environment.

[0108] In the embodiment, the heat management system further comprises a second temperature detection member, a detection end of the second temperature detection member is arranged on the battery 31 and is used for detecting the temperature of the battery 31. With such a structural arrangement, by monitoring the temperature of the battery 31, the heat management system can respond quickly, such as rapidly cooling the battery through the cooler 32 when the battery temperature is too high, avoiding safety hazards caused by overheating of the battery, and improving the overall safety of the battery system.

[0109] In the embodiment, the heat management system further comprises a power detection member, a detection end of the power detection member is arranged on the battery 31 and is used for detecting the power of the battery 31. With such a structural arrangement, the power detection member can monitor the power of the battery 31 in real time, which is crucial for judging the charging and discharging state of the battery, the remaining range, and the energy distribution strategy of the heat management system.

[0110] Specifically, the thermal management system further comprises a pressure detection member 202 arranged on the hydraulic cooling circuit 20, and specifically, the pressure detection member 202 is arranged on the hydraulic pipeline between the hydraulic structure 201 and the hydraulic radiator 203. The pressure detection member 202 is used to monitor the pressure change of the hydraulic system during operation, so as to ensure that the hydraulic system can be stably operated, and system failure or safety problems caused by excessively high or low pressure can be avoided.

[0111] Specifically, the thermal management system further comprises a hydraulic radiator 203 arranged on the pipeline of the hydraulic cooling circuit 20, and the hydraulic radiator 203 is usually arranged near the outlet of the hydraulic oil flowing from the high-pressure area to the low-pressure area in the hydraulic system, and the hydraulic radiator 203 is used to dissipate the heat generated by the hydraulic system during operation to the external environment.

[0112] In the embodiment, the thermal management system further comprises a heater 40 arranged on the heat exchange circuit 1, and the heating end of the heater 40 is arranged in the space to be heated. The heater 40 is used to assist heating the space to be heated. The heater 40 is a PTC (Positive Temperature Coefficient) water heating heater.

[0113] In the embodiment, the thermal management system can select different working modes according to different working conditions, so as to realize efficient energy management of the battery 31, the electric drive system and the cab of the engineering machinery. In the high-temperature working condition, the system can provide refrigeration for the cab and the battery 31, so as to ensure normal operation of the equipment and comfort of the personnel. In the low-temperature working condition, the system can recover heat from the electric drive system, the hydraulic oil and the environment, and use the heat for heating the cab and the battery 31, so as to significantly reduce the heating energy consumption and prolong the working time of the engineering machinery in the cold condition. In addition, the system also uses the heat storage characteristics of the battery 31 to pre-store heat and release the heat when needed, so as to further optimize the energy utilization efficiency.

[0114] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: efficient energy management of the battery, the electric drive system and the cab of the engineering machinery in different working conditions is realized. The system improves the energy utilization efficiency of the engineering machinery, reduces the operation cost, and enhances the adaptability and reliability of the equipment in the extreme temperature condition.

[0115] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0116] The foregoing is considered as illustrative only of the principles of the application. Other variations and modifications are possible in light of the above teachings. Therefore, the scope of the application is not intended to be limited to the particular embodiments described herein but is to be accorded the broadest scope consistent with the principles and the scope of the appended claims and equivalents thereof. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal sense unless expressly so defined herein.

[0117] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0118] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the devices described in the drawings. For example, if the devices in the drawings are inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0119] In addition, it should be noted that the use of the words "first", "second" and the like to define various components is merely intended to distinguish the corresponding components, and the words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0120] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thermal management system, characterized by, The heat management system comprises: a heat exchange circuit (1) provided with a heat exchange assembly, an indoor heat exchange end of the heat exchange assembly being arranged in a space to be heat exchanged; an electric drive cooling circuit (2) provided with an electric drive structure (21); a battery cooling circuit (3) provided with a battery (31) and a cooler (32) connected to each other, the cooler (32) being arranged in communication with the heat exchange circuit (1) so that a cooling liquid in the cooler (32) exchanges heat with a refrigerant in the heat exchange circuit (1); a first heat exchange member (4) arranged in communication with the heat exchange circuit (1) and the electric drive cooling circuit (2) so that the refrigerant in the heat exchange circuit (1) exchanges heat with the cooling liquid in the electric drive cooling circuit (2).

2. The thermal management system of claim 1, wherein, The heat management system further comprises: a heat exchange branch (5) arranged in communication with the first heat exchange member (4) and selectively arranged in communication with the electric drive cooling circuit (2); a hydraulic cooling circuit (20) provided with a hydraulic structure (201); a second heat exchange member (30) arranged in communication with the heat exchange branch (5) and the hydraulic cooling circuit (20) so that the cooling liquid in the heat exchange branch (5) exchanges heat with the cooling liquid in the hydraulic cooling circuit (20).

3. The thermal management system of claim 1, wherein, The heat management system further comprises: a heat exchange branch (5) arranged in communication with the first heat exchange member (4); a first three-way valve (61) and a second three-way valve (62) arranged at intervals on the electric drive cooling circuit (2); a first interface of the first three-way valve (61) is arranged in communication with a cooling liquid outlet of the electric drive structure (21), a second interface is arranged in communication with the heat exchange branch (5), and a third interface is arranged in communication with a first interface of the second three-way valve (62); a second interface of the second three-way valve (62) is arranged in communication with the heat exchange branch (5), and a third interface is arranged in communication with a cooling liquid inlet of the electric drive structure (21).

4. The thermal management system of claim 3, wherein, The heat management system further comprises: an electric drive cooling water pump (22) arranged on the electric drive cooling circuit (2) and located between the first three-way valve (61) and the cooling liquid outlet of the electric drive structure (21), a rotating speed of the electric drive cooling water pump (22) being adjustably arranged; and / or a radiator (23) arranged on the electric drive cooling circuit (2) and located between the second three-way valve (62) and the cooling liquid inlet of the electric drive structure (21), a rotating speed of a fan of the radiator (23) being adjustably arranged.

5. The thermal management system of claim 1, wherein, The heat management system further comprises: A first connecting branch (71) and a third three-way valve (63), one end of the first connecting branch (71) being in communication with the cooling liquid inlet of the battery (31), the other end being in communication with the first interface of the third three-way valve (63); the second interface of the third three-way valve (63) is used to communicate with the cooling liquid outlet of the electric drive structure (21), and the third interface is used to communicate with the cooling liquid inlet of the electric drive structure (21); and / or, A second connecting branch (72), one end of the second connecting branch (72) being in communication with the cooling liquid outlet of the battery (31), the other end being in communication with the cooling liquid inlet of the electric drive structure (21); and / or, A fourth three-way valve (64) is arranged on the battery cooling circuit (3), the first interface of the fourth three-way valve (64) is used to communicate with the cooling liquid inlet of the battery (31), the second interface is used to communicate with the cooler (32), and the third interface is used to communicate with the electric drive cooling circuit (2).

6. The thermal management system of claim 1, wherein, The heat exchange assembly includes a compressor (8), an outdoor heat exchanger (9), and an evaporator (10); the heat exchange circuit (1) includes a first flow path (11) and a second flow path (12), the compressor (8) is arranged on the first flow path (11), and the evaporator (10) is arranged on the second flow path (12); the heat exchange circuit (1) further includes: A third flow path (13), the outdoor heat exchanger (9) is arranged on the third flow path (13), the second flow path (12) and the third flow path (13) are selectively in communication with the first flow path (11), and the second flow path (12) is selectively in communication with the third flow path (13); A fourth flow path (14), the cooler (32) is used to communicate with the fourth flow path (14), and the first flow path (11) and the third flow path (13) are selectively in communication with the fourth flow path (14); Wherein, the heat exchange circuit (1) has a first refrigeration mode, a second refrigeration mode and a third refrigeration mode; when the heat exchange circuit (1) is in the first refrigeration mode, the first flow path (11), the third flow path (13) and the second flow path (12) are sequentially communicated, and the outlet of the second flow path (12) is in communication with the first flow path (11); when the heat exchange circuit (1) is in the second refrigeration mode, the first flow path (11), the third flow path (13) and the fourth flow path (14) are sequentially communicated, and the outlet of the fourth flow path (14) is in communication with the first flow path (11); when the heat exchange circuit (1) is in the third refrigeration mode, the first flow path (11) and the third flow path (13) are communicated, the inlet of the second flow path (12) and the inlet of the fourth flow path (14) are both in communication with the outlet of the third flow path (13), and the outlet of the second flow path (12) and the outlet of the fourth flow path (14) are both in communication with the first flow path (11).

7. The thermal management system of claim 1, wherein, The heat exchange assembly comprises a compressor (8) and an evaporator (10); the heat exchange circuit (1) comprises a first flow path (11) and a second flow path (12), the compressor (8) is arranged on the first flow path (11), the evaporator (10) is arranged on the second flow path (12), and the first flow path (11) and the second flow path (12) are selectively communicated; the heat exchange circuit (1) further comprises: A fifth flow path (15), the first heat exchange element (4) is arranged on the fifth flow path (15), and the first flow path (11) and the second flow path (12) are selectively communicated with the fifth flow path (15); The heat exchange circuit (1) has a first heating mode; when the heat exchange circuit (1) is in the first heating mode, the first flow path (11), the second flow path (12) and the fifth flow path (15) are sequentially communicated, and the outlet of the fifth flow path (15) is communicated with the first flow path (11).

8. The thermal management system of claim 1, wherein, The heat exchange assembly comprises a compressor (8), an outdoor heat exchanger (9) and an evaporator (10); the heat exchange circuit (1) comprises a first flow path (11), a second flow path (12), a third flow path (13), a fourth flow path (14) and a fifth flow path (15), the compressor (8) is arranged on the first flow path (11), the evaporator (10) is arranged on the second flow path (12), the outdoor heat exchanger (9) is arranged on the third flow path (13), the first heat exchange element (4) is arranged on the fifth flow path (15), the second flow path (12) and the third flow path (13) are selectively communicated with the first flow path (11), the second flow path (12) and the third flow path (13) are selectively communicated with the fifth flow path (15); the cooler (32) is used for being communicated with the fourth flow path (14), and the first flow path (11) and the second flow path (12) are selectively communicated with the fourth flow path (14); wherein: The heat exchange circuit (1) has a second heating mode; when the heat exchange circuit (1) is in the second heating mode, the first flow path (11), the second flow path (12) and the fourth flow path (14) are sequentially communicated, and the outlet of the fourth flow path (14) is communicated with the first flow path (11); and / or, The heat exchange circuit (1) has a heat recovery mode; when the heat exchange circuit (1) is in the heat recovery mode, the first flow path (11), the third flow path (13), the fifth flow path (15) and the second flow path (12) are sequentially communicated, and the end of the second flow path (12) away from the fifth flow path (15) is communicated with the first flow path (11).

9. The thermal management system of claim 8, wherein, The heat management system further comprises: A first expansion valve (101) arranged on the second flow path (12) and located at the refrigerant inlet of the evaporator (10); the opening degree of the first expansion valve (101) is adjustably arranged; and / or, a second expansion valve (102) arranged on the fourth flow path (14) and located at a refrigerant inlet of the cooler (32); an opening degree of the second expansion valve (102) is adjustably arranged; and / or, a third expansion valve (103) arranged on a fifth flow path (15) and located at a refrigerant inlet of the first heat exchange member (4); an opening degree of the third expansion valve (103) is adjustably arranged; and / or, a fourth expansion valve (104) arranged on the second flow path (12) and located at a refrigerant outlet of the evaporator (10); an opening degree of the fourth expansion valve (104) is adjustably arranged.

10. The thermal management system of any one of claims 1 to 9, wherein, The heat management system further comprises: a first temperature detection member, a detection end of the first temperature detection member is arranged on the heat management system and used for detecting an ambient temperature in which the heat management system is located; and / or, a second temperature detection member, a detection end of the second temperature detection member is arranged on the battery (31) and used for detecting a temperature of the battery (31); and / or, a power detection member, a detection end of the power detection member is arranged on the battery (31) and used for detecting a power of the battery (31).

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