A thermal management system, a thermal management method, and a thermal management controller

Abstract

The present application relates to a thermal management system, a thermal management method, and a thermal management controller. Among them, the thermal management system includes: an electric drive module, an air conditioning module, a battery module, and a multi-way valve for connecting the electric drive module and the battery module. When the multi-way valve connects the electric drive module and the battery module, the waste heat generated by the electric drive module is used to heat the battery module. The electric drive module is connected to the air conditioning module through a first heat exchanger, and the air conditioning module is connected to the battery module through a second heat exchanger. The water side of the first heat exchanger is located inside the electric drive module, and the refrigerant side of the first heat exchanger is located inside the air conditioning module. The water side of the second heat exchanger is located inside the battery module, and the refrigerant side of the second heat exchanger is located inside the air conditioning module. By adopting the thermal management system provided by the present application, the problem of low thermal management efficiency in the prior art can be improved.

Description

Technical Field

[0001] This application relates to the field of automotive automatic control, and particularly to a thermal management system, a thermal management method, and a thermal management controller. Background Art

[0002] New energy vehicles have unique advantages in aspects such as energy conservation and environmental pollution reduction, and are thus widely recognized and loved by the public. The battery is an important component of a new energy vehicle, and its performance directly affects the endurance of the new energy vehicle. The performance of the battery is easily affected by temperature. Especially in a low-temperature environment, the discharge capacity of the battery decreases, resulting in a reduction in the driving range of the vehicle.

[0003] Currently, a separate heat pump system can be installed to heat the battery to solve the problem of reduced endurance of new energy vehicles at low temperatures. However, this method not only requires a large amount of space, but also consumes additional energy because the existing waste heat of the vehicle is not utilized, so there is a problem of low thermal management efficiency. Summary of the Invention

[0004] Based on this, this application provides a thermal management system, a thermal management method, and a thermal management controller to improve the problem of low thermal management efficiency in the prior art.

[0005] In a first aspect, this application provides a thermal management system, which includes: an electric drive module, an air conditioning module, a battery module, and a multi-way valve for connecting the electric drive module and the battery module. When the multi-way valve connects the electric drive module and the battery module, the waste heat generated by the electric drive module is used to heat the battery module. The electric drive module is connected to the air conditioning module through a first heat exchanger, and the air conditioning module is connected to the battery module through a second heat exchanger. The water side of the first heat exchanger is located inside the electric drive module, and the refrigerant side of the first heat exchanger is located inside the air conditioning module. The water side of the second heat exchanger is located inside the battery module, and the refrigerant side of the second heat exchanger is located inside the air conditioning module.

[0006] In combination with the first aspect, in the first possible implementation manner of the first aspect, the multi-way valve is a five-way valve with five ports. The thermal management system further includes a first electronic water pump and a second electronic water pump. The electric drive module further includes a motor and a radiator, and the battery module further includes a battery pack. The first port of the five-way valve is connected to one end of the water side of the second heat exchanger. The second port of the five-way valve is connected to one end of the battery pack through the second electronic water pump. The other end of the water side of the second heat exchanger is connected to the other end of the battery pack. The third port of the five-way valve is connected to the water side of the first heat exchanger, the motor, and one end of the radiator. The fourth port of the five-way valve is connected to the other end of the radiator in the electric drive module. The fifth port of the five-way valve is connected to the water side of the first heat exchanger and the other end of the motor through the first electronic water pump.

[0007] Combined with the first implementable manner of the first aspect, in the second implementable manner of the first aspect, the above-mentioned electric drive module further includes an expansion tank; wherein, one end of the expansion tank is connected to the water side of the first heat exchanger and one end of the motor, and the other end of the expansion tank is connected to the water side of the first heat exchanger and the other end of the motor through a first electronic water pump.

[0008] Combined with the first aspect, in the third implementable manner of the first aspect, the above-mentioned air-conditioning module further includes an air-conditioning assembly, a compressor, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, a first stop valve, a second stop valve, a third stop valve, a check valve, a liquid receiver drier, a first coaxial tube, and a second coaxial tube; the air-conditioning assembly includes a wind heating device, an internal condenser, and an evaporator; wherein, one end of the internal condenser of the air-conditioning assembly is respectively connected to one end of the third stop valve and one end of the first coaxial tube through the compressor, and the other end of the internal condenser of the air-conditioning assembly is respectively connected to one end of the first stop valve and one end of the second stop valve; wherein, one end of the refrigerant side of the first heat exchanger is respectively connected to the other end of the third stop valve and the other end of the first stop valve, and the other end of the refrigerant side of the first heat exchanger is respectively connected to one end of the third electronic expansion valve and the water inlet of the check valve; the water outlet of the check valve is respectively connected to the other end of the second stop valve and one end of the liquid receiver drier; the other end of the third electronic expansion valve is respectively connected to the other end of the liquid receiver drier and one end of the second coaxial tube; wherein, one end of the evaporator of the air-conditioning assembly is respectively connected to the other end of the second coaxial tube and one end of the second electronic expansion valve through the first electronic expansion valve; wherein, one end of the refrigerant side of the second heat exchanger is connected to the other end of the second electronic expansion valve, and the other end of the refrigerant side of the second heat exchanger is respectively connected to the other end of the evaporator of the air-conditioning assembly and the other end of the first coaxial tube.

[0009] In the second aspect, the present application further provides a heat management method, which includes: receiving a switching instruction, wherein the switching instruction is used to indicate switching of the heat management mode; when the switching instruction is a first instruction, connecting the first port and the second port of the five-way valve, and connecting the third port and the fifth port, and blocking the fourth port, so that the radiator is disconnected to perform internal heat exchange; when the switching instruction is a second instruction, connecting the first port and the fifth port of the five-way valve, and connecting the second port and the third port, and blocking the fourth port, so that the electric drive module in the heat management system is connected to the battery module to perform heat exchange; when the switching instruction is a third instruction, connecting the first port and the second port of the five-way valve, and connecting the fourth port and the fifth port, and blocking the third port, so that the radiator is connected to perform external heat exchange.

[0010] In combination with the second aspect, in the first implementable manner of the second aspect, when the switching instruction is the first instruction, the method further includes: opening the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and closing the first cut-off valve, the first electronic expansion valve, and the second expansion valve, so as to store the waste heat of the motor by using the first heat exchanger.

[0011] In combination with the second aspect, in the second implementable manner of the second aspect, when the switching instruction is the second instruction, the method further includes: opening the first cut-off valve and the first electronic expansion valve in the air-conditioning module of the thermal management system, and closing the second cut-off valve, the third cut-off valve, the second electronic expansion valve, and the third electronic expansion valve, so that the battery module and the electric drive module in the thermal management system are connected in series, so as to heat the battery pack in the battery module by using the waste heat of the electric drive.

[0012] In combination with the second aspect, in the third implementable manner of the second aspect, when the switching instruction is the third instruction, the method further includes: opening the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve in the air-conditioning module of the thermal management system, and closing the second cut-off valve, the third cut-off valve, and the third electronic expansion valve, so as to dissipate the heat in the thermal management system into the air through the radiator; or opening the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and closing the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve, so as to recover the heat in the air into the thermal management system through the radiator.

[0013] In a third aspect, the present application further provides a thermal management controller. The thermal management method includes: a receiving unit for receiving a switching instruction, where the switching instruction is used to indicate switching of the thermal management mode; a control unit for connecting the first port and the second port of the five-way valve, connecting the third port and the fifth port, and blocking the fourth port when the switching instruction is the first instruction, so that the radiator is disconnected for internal heat exchange; the control unit is further used for connecting the first port and the fifth port of the five-way valve, connecting the second port and the third port, and blocking the fourth port when the switching instruction is the second instruction, so that the electric drive module and the battery module in the thermal management system are connected for heat exchange; the control unit is further used for connecting the first port and the second port of the five-way valve, connecting the fourth port and the fifth port, and blocking the third port when the switching instruction is the third instruction, so that the radiator is connected for external heat exchange.

[0014] In combination with the third aspect, in the first implementable manner of the third aspect, when the switching instruction is the first instruction, the control unit is further configured to: open the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and close the first cut-off valve, the first electronic expansion valve, and the second expansion valve, so as to store the waste heat of the motor by using the first heat exchanger.

[0015] In combination with the third aspect, in the second implementable manner of the third aspect, when the switching instruction is the second instruction, the control unit is further configured to: open the first cut-off valve and the first electronic expansion valve in the air-conditioning module of the thermal management system, and close the second cut-off valve, the third cut-off valve, the second electronic expansion valve, and the third electronic expansion valve, so that the battery module and the electric drive module in the thermal management system are connected in series, so as to heat the battery pack in the battery module by using the waste heat of the electric drive.

[0016] In combination with the third aspect, in the third implementable manner of the third aspect, when the switching instruction is the third instruction, the control unit is further configured to: open the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve in the air-conditioning module of the thermal management system, and close the second cut-off valve, the third cut-off valve, and the third electronic expansion valve, so as to dissipate the heat in the thermal management system into the air through the radiator; or, open the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and close the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve, so as to recover the heat in the air into the thermal management system through the radiator.

[0017] In the fourth aspect, the present application further provides a thermal management controller, which includes a processor and a memory. The processor and the memory are connected through a bus; the processor is configured to execute multiple instructions; the memory is configured to store multiple instructions, and the instructions are adapted to be loaded and executed by the processor to perform the thermal management method as described in the second aspect or any one of the implementation manners of the second aspect.

[0018] In summary, the present application provides a thermal management system, a thermal management method, and a thermal management controller. Among them, the electric drive module, the air-conditioning module, and the battery module in the thermal management system are connected through two heat exchangers, and the electric drive module and the battery module are connected through a multi-way valve, so that heat exchange can be performed between the three modules not only through the heat exchangers, but also the waste heat of the electric drive module can be directly used to heat the battery module to solve the problem of low-temperature battery life, thereby improving the thermal management efficiency. In addition, since the three modules share two heat exchangers and the volume of the multi-way valve is small, the thermal management system provided by the present application also has the advantages of small volume and simple layout. Generally speaking, by adopting the thermal management system provided by the present application, the problem of low thermal management efficiency in the prior art can be improved. Description of the Drawings

[0019] Figure 1 A structural block diagram of the thermal management system in an embodiment provided for this application;

[0020] Figure 2 A structural block diagram of the thermal management system in another embodiment provided for this application;

[0021] Figure 3 A structural block diagram of the thermal management system in another embodiment provided for this application;

[0022] Figure 4 A structural block diagram of the air conditioning module in another embodiment provided for this application;

[0023] Figure 5 A structural block diagram of the thermal management system in another embodiment provided for this application;

[0024] Figure 6 A schematic flow diagram of the thermal management method in an embodiment provided for this application;

[0025] Figure 7 A schematic block diagram of a thermal management controller provided for this application;

[0026] Figure 8 A structural block diagram of a thermal management controller provided for this application. Detailed implementation manners

[0027] In order to make the objectives, technical solutions and advantages of this application clearer, the following further elaborates on this application in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain this application and are not used to limit this application.

[0028] Since the embodiments of this application involve relatively more professional terms, for the convenience of understanding, the relevant terms and concepts that may be involved in the embodiments of this application are introduced below.

[0029] It should be noted that the thermal management controller involved in the following of this application may include, but is not limited to, a dedicated thermal management controller, a terminal device, a computer, a processor, etc. It can be a device integrated in a vehicle or a detachable independent device on the vehicle. The thermal management controller can interact with other devices on the vehicle, such as receiving a switching instruction and switching the thermal management mode according to the switching instruction. This application will not elaborate on this. The processor may include, but is not limited to, an electronic control unit (ECU), a central processing unit (CPU), a general-purpose processor, a coprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0030] It should also be noted that the illustrations provided in this embodiment only schematically illustrate the basic concept of this application. Therefore, only the components related to this application are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex. The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which this application can be implemented. Therefore, they do not have technical substance significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover. At the same time, the orientation or positional relationships indicated in this specification, such as "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. The change or adjustment of its relative relationship, without substantial change in the technical content, should also be regarded as the scope in which this application can be implemented. Therefore, it cannot be understood as a limitation to this application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] Currently, due to the problem of relatively low thermal management efficiency in the existing technology, this application proposes a thermal management system. When the battery module needs to be heated, a multi-way valve in the thermal management system is used to connect the battery module and the electric drive module, so as to utilize the waste heat of the motor in the electric drive module to heat the battery module. Specifically:

[0032] As Figure 1 shown, the thermal management system includes an electric drive module, an air conditioning module, a battery module, and a multi-way valve for connecting the electric drive module and the battery module. Among them, the electric drive module is connected to the air conditioning module through a first heat exchanger, and the air conditioning module is connected to the battery module through a second heat exchanger. Both the first heat exchanger and the second heat exchanger respectively include a water side and a refrigerant side. The water side of the first heat exchanger is located in the electric drive module, and the refrigerant side of the first heat exchanger is located in the air conditioning module; the water side of the second heat exchanger is located in the battery module, and the refrigerant side of the second heat exchanger is located in the air conditioning module.

[0033] It should be noted that the multi-way valve can connect or disconnect the battery module and the electric drive module as needed. When the temperature of the battery module is relatively low and the battery module needs to be heated, the multi-way valve connects the battery module and the electric drive module, so that the waste heat generated by the electric drive module can heat the battery module. The multi-way valve can be a two-way valve, a three-way valve, etc., and this application does not limit this.

[0034] Based on the above description, the thermal management system provided by this application can at least achieve: First, improve the thermal management efficiency. Because the battery module can not only perform heat exchange with the air conditioning module and the electric drive module through the first heat exchanger and the second heat exchanger, but also connect the battery module and the electric drive module through the multi-way valve, so that the waste heat of the electric drive module can heat the battery module to solve the problem of low-temperature battery endurance, thereby improving the thermal management efficiency; Second, reduce the space occupied by the thermal management system. Because the battery module, the electric drive module, and the air conditioning module are sequentially connected through two heat exchangers, that is, two heat exchangers are shared, and the volume of the multi-way valve is small, making the volume of the thermal management system provided by this application small and the layout simple, thus reducing the space occupied by the thermal management system.

[0035] In an implementable manner, as Figure 2As shown, the above multi-way valve is a five-way valve with five ports. The thermal management system further includes a first electric water pump EMP1 and a second electric water pump EMP2. The electric drive module further includes a motor and a radiator. The battery module further includes a battery pack. Among them: The first port A of the five-way valve is connected to one end of the water side of the second heat exchanger. The second port B of the five-way valve is connected to one end of the battery pack through the second electric water pump EMP2. The other end of the water side of the second heat exchanger is connected to the other end of the battery pack. The third port C of the five-way valve is connected to the water side of the first heat exchanger, the motor, and one end of the radiator. The fourth port D of the five-way valve is connected to the other end of the radiator in the electric drive module. The fifth port E of the five-way valve is connected to the water side of the first heat exchanger and the other end of the motor through the first electric water pump EMP1.

[0036] In the present feasible embodiment, the thermal management system can switch three working modes through the five-way valve. The first mode: The first port and the second port are connected, the third port and the fifth port are connected, and the fourth port is blocked (A - B connection, C - E connection, D blocked). The second mode: The first port and the fifth port are connected, the second port and the third port are connected, and the fourth port is blocked (A - E connection, B - C connection, D blocked). The third mode: The first port and the second port are connected, the fourth port and the fifth port are connected, and the third port is blocked (i.e., A - B connection, D - E connection, C blocked).

[0037] In the first mode, the electric drive module, the air conditioning module, and the battery module are connected in sequence. The radiator in the electric drive module is disconnected. The electric drive module, the air conditioning module, and the battery module can perform heat exchange through the internal first heat exchanger and second heat exchanger, that is: One end of the water side of the second heat exchanger is connected to one end of the battery pack through the second electric water pump EMP2. The other end of the water side of the second heat exchanger is connected to the other end of the battery pack. One end of the water side of the first heat exchanger and the motor is connected to the other end of the water side of the first heat exchanger and the motor through the first electric water pump EMP1.

[0038] In the second mode, in addition to the electric drive module, the air conditioning module, and the battery module being connected in sequence, the electric drive module is also directly connected to the battery module, so that the waste heat of the motor in the electric drive module can heat the battery. At this time, the radiator in the electric drive module is disconnected, that is: One end of the water side of the second heat exchanger is connected to one end of the water side of the first heat exchanger and the motor through the first electric water pump EMP1. The other end of the water side of the first heat exchanger and the motor is connected to one end of the battery pack through the second electric water pump EMP2. The other end of the water side of the second heat exchanger is connected to the other end of the battery pack.

[0039] In the third mode, the electric drive module, the air conditioning module, and the battery module are connected in sequence, and the radiator in the electric drive module is connected and accessed, so that the electric drive module, the air conditioning module, and the battery module can all dissipate heat or obtain air heat through this radiator, thereby further reducing the space occupied by the thermal management system and improving the thermal management efficiency, that is: one end of the water side of the second heat exchanger is connected to one end of the battery pack through the second electronic water pump EMP2, and the other end of the water side of the second heat exchanger is connected to the other end of the battery pack; one end of the radiator is connected to one end of the water side of the motor and the first heat exchanger, and the other end of the radiator is connected to the water side of the first heat exchanger and the other end of the motor through the first electronic water pump EMP1.

[0040] In an implementable manner, as Figure 3 shown, the electric drive module further includes an expansion tank; wherein, one end of the expansion tank is connected to the radiator, and the other end of the expansion tank is connected to the fifth port of the five-way valve.

[0041] In this implementable manner, the electric drive module further includes an expansion tank. Actually, one end of the expansion tank is connected to one end of the radiator. Since the radiator is connected to one end of the water side of the first heat exchanger and one end of the motor through this end, it is equivalent to that one end of the expansion tank is connected to one end of the water side of the first heat exchanger and one end of the motor. The other end of the expansion valve is connected to the fifth port of the five-way valve. Since the fifth port of the five-way valve is connected to the water side of the first heat exchanger and the other end of the motor through the first electronic water pump EMP1, it is equivalent to that the other end of the expansion tank is connected to the water side of the first heat exchanger and the other end of the motor. It can be seen that the expansion tank is always connected to the electric drive module. In the first mode and the third mode, the expansion tank is used to replenish water and exhaust air for the electric drive module. In the second mode, since the electric drive module is directly connected to the battery module, the battery module can also use this expansion tank to replenish water and exhaust air, so that the battery module not only does not need to install a heat pump system separately, but also does not need to install an expansion tank separately. Therefore, the number of components and the complexity of the system are further reduced, and the space layout is saved.

[0042] In an implementable manner, the present application proposes a specific implementation manner for the air conditioning module in the thermal management system, as Figure 4As shown in the figure, the air-conditioning module further includes an air-conditioning assembly, a compressor CMPSR, a first electronic expansion valve EXV1, a second electronic expansion valve EXV2, a third electronic expansion valve EXV3, a first shut-off valve SOV1, a second shut-off valve SOV2, a third shut-off valve SOV3, a check valve CKV, a liquid receiver dryer, a first coaxial tube P1, and a second coaxial tube P2; the air-conditioning assembly includes a wind heating device, an internal condenser, and an evaporator. Among them: one end of the internal condenser of the air-conditioning assembly is respectively connected to one end of the third shut-off valve SOV3 and one end of the first coaxial tube P1 through the compressor CMPSR, and the other end of the internal condenser of the air-conditioning assembly is respectively connected to one end of the first shut-off valve SOV1 and one end of the second shut-off valve SOV2; one end of the refrigerant side of the first heat exchanger is respectively connected to the other end of the third shut-off valve SOV3 and the other end of the first shut-off valve SOV1, and the other end of the refrigerant side of the first heat exchanger is respectively connected to one end of the third electronic expansion valve EXV3 and the water inlet of the check valve CKV; the water outlet of the check valve CKV is respectively connected to the other end of the second shut-off valve SOV2 and one end of the liquid receiver dryer; the other end of the third electronic expansion valve EXV3 is respectively connected to the other end of the liquid receiver dryer and one end of the second coaxial tube P2; one end of the evaporator of the air-conditioning assembly is respectively connected to the other end of the second coaxial tube P2 and one end of the second electronic expansion valve EXV2 through the first electronic expansion valve EXV1; one end of the refrigerant side of the second heat exchanger is connected to the other end of the second electronic expansion valve EXV2, and the other end of the refrigerant side of the second heat exchanger is respectively connected to the other end of the evaporator of the air-conditioning assembly and the other end of the first coaxial tube P1.

[0043] In the present feasible embodiment, when the electronic expansion valve and the shut-off valve are opened, the circuit where they are located is connected, and when the electronic expansion valve and the shut-off valve are closed, the circuit where they are located is cut off. Therefore, by adjusting the on-off states of the shut-off valves and the electronic expansion valves in the air-conditioning module, different connection states can be achieved among the electric drive module, the air-conditioning module, and the battery module.

[0044] For example, when SOV1 is open, SOV2 is closed, SOV3 is closed, EXV1 is open, EXV2 is open, and EXV3 is closed, the electric drive module, the air-conditioning module, and the battery module are connected in sequence, and at this time, heat exchange can be carried out among the electric drive module, the air-conditioning module, and the battery module.

[0045] As another example, when SOV1 is open, SOV2 is closed, SOV3 is closed, EXV1 is open, EXV2 is closed, and EXV3 is closed, the electric drive module is connected to the air conditioning module, and the battery module is not connected to the air conditioning module. At this time, heat exchange can occur between the electric drive module and the air conditioning module. In this connection mode, if it is necessary to heat the battery module, the five-way valve can be used to connect the electric drive module and the battery module (i.e., A-E connection, B-C connection, D cut off), so that the waste heat of the motor in the electric drive module can heat the battery module.

[0046] Generally speaking, by combining the foregoing several implementable embodiments, a thermal management system as shown in Figure 5 can be obtained. The thermal management system not only includes the components in the foregoing implementable embodiments, but may also include a temperature relay T, a pressure relay PT, a throttle tube, etc. Specifically:

[0047] As shown in Figure 5 , two temperature relays T are provided at both ends of the battery pack in the battery module. A pressure relay PT is provided at one end where the refrigerant side of the second heat exchanger is connected to the evaporator of the first coaxial tube and the air conditioning assembly. A temperature relay T is provided at one end where the evaporator of the air conditioning assembly is connected to the refrigerant side of the first coaxial tube and the second heat exchanger. A pressure relay PT is provided at one end where the internal condenser of the air conditioning assembly is connected to the compressor CMPSR. A temperature relay T is provided at one end where the third shut-off valve SOV3 is connected to the refrigerant side of the first heat exchanger and the first shut-off valve SOV1. In addition, the water side of the first heat exchanger can also be connected to the first electronic water pump through a throttle tube. In addition, the motor in the battery module includes a drive motor and an on-vehicle charger. The third port of the five-way valve is connected to the water side of the first heat exchanger, the drive motor, and one end of the radiator. The other end of the drive motor is connected to one end of the on-vehicle charger. The fifth port of the five-way valve is connected to the water side of the first heat exchanger and the other end of the on-vehicle charger through the first electronic water pump. The connection methods of other components are referred to the foregoing implementable embodiments and will not be elaborated here.

[0048] The present application also proposes a thermal management method applied to the foregoing thermal management system. The execution subject of this method is a thermal management controller, which is used to control the foregoing thermal management system to implement the thermal management method proposed by the present application. Specifically, as shown in Figure 6 :

[0049] 601: Receive a switching instruction, where the switching instruction is used to indicate switching of the thermal management mode.

[0050] Among them, the thermal management controller can receive a switching instruction sent by a user or other device, and when receiving the instruction, switch the thermal management mode according to the indication of the instruction. The switching instruction includes a first instruction, a second instruction, and a third instruction. The first instruction is used to switch the thermal management mode to the first mode, the second instruction is used to switch the thermal management mode to the second mode, and the third instruction is used to switch the thermal management mode to the third mode.

[0051] 602: When the switching instruction is the first instruction, connect the first port and the second port of the five-way valve, and connect the third port and the fifth port, and cut off the fourth port, so that the radiator is disconnected for internal heat exchange.

[0052] Among them, as Figure 2 shown, when the thermal management controller receives the first instruction, it controls the thermal management system to switch to the first mode, that is, controls the A-B connection and C-E connection of the five-way valve, and D is cut off, so that the electric drive module, the air-conditioning module, and the battery module in the thermal management system are connected in sequence, and the radiator is not connected, so that the electric drive module, the air-conditioning module, and the battery module perform internal heat exchange through the first heat exchanger and the second heat exchanger.

[0053] 603: When the switching instruction is the second instruction, connect the first port and the fifth port of the five-way valve, and connect the second port and the third port, and cut off the fourth port, so that the electric drive module and the battery module in the thermal management system are connected for heat exchange.

[0054] Among them, for example Figure 2 shown, when the thermal management controller receives the second instruction, it controls the thermal management system to switch to the second mode, that is, controls the A-E connection and B-C connection of the five-way valve, and D is cut off, so that while the electric drive module, the air-conditioning module, and the battery module in the thermal management system are connected in sequence, the electric drive module is also directly connected to the battery module, and the radiator is not connected, so that the electric drive module can directly perform heat exchange with the battery module, that is, the motor waste heat of the electric drive module heats the battery module.

[0055] 604: When the switching instruction is the third instruction, connect the first port and the second port of the five-way valve, and connect the fourth port and the fifth port, and cut off the third port, so that the radiator is connected for external heat exchange.

[0056] Among them, for example Figure 2As shown, when the thermal management controller receives the third instruction, it controls the thermal management system to switch to the third mode, that is, to control the A-B connection and D-E connection of the five-way valve, and C is cut off, so that the electric drive module, the air conditioning module, and the battery module in the thermal management system are connected in sequence, and the radiator is connected, so that the electric drive module, the air conditioning module, and the battery module can exchange heat with the external air through the radiator. For example, the heat in the thermal management system is dissipated into the air, or the heat in the air is recovered into the thermal management system.

[0057] In summary, in the embodiment of the present application, since the thermal management mode of the thermal management system can be switched according to the switching instruction sent by the user or other devices, the efficiency of thermal management is improved.

[0058] In an implementable manner, when the switching instruction is the first instruction, the method further includes: opening the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air conditioning module of the thermal management system, and closing the first cut-off valve, the first electronic expansion valve, and the second expansion valve, so as to store the waste heat of the motor by using the first heat exchanger.

[0059] Among them, for example Figure 4 As shown, after the thermal management controller receives the first instruction, while controlling the A-B connection and C-E connection of the five-way valve and D is cut off, it controls the SOV1 in the air conditioning module to close, SOV2 to open, SOV3 to open, EXV1 to close, EXV2 to close, and EXV3 to open, so that the electric drive module is connected to the air conditioning module, and the battery module is not connected to the air conditioning module. At this time, heat exchange can occur between the electric drive module and the air conditioning module. That is, after starting the compressor CMPSR, the air conditioning module heats up and the electric drive module stores heat to achieve the cockpit heating function.

[0060] In an implementable manner, when the switching instruction is the second instruction, the method further includes: opening the first cut-off valve and the first electronic expansion valve in the air conditioning module of the thermal management system, and closing the second cut-off valve, the third cut-off valve, the second electronic expansion valve, and the third electronic expansion valve, so that the battery module and the electric drive module in the thermal management system are connected in series, so as to heat the battery pack in the battery module by using the waste heat of the electric drive.

[0061] Among them, for example Figure 4As shown, after the thermal management controller receives the second instruction, while controlling the A-E connection, B-C connection, and D cut-off of the five-way valve, when SOV1 is opened, SOV2 is closed, SOV3 is closed, EXV1 is opened, EXV2 is closed, and EXV3 is closed, the electric drive module is connected to the air conditioning module, the battery module is not connected to the air conditioning module, and the electric drive module is connected to the battery module. At this time, heat exchange can occur between the electric drive module and the air conditioning module, and heat exchange can occur between the electric drive module and the battery module. That is, after starting the compressor CMPSR, the air conditioning module cools, and the electric drive module heats the battery module to achieve the heat storage function of the battery pack.

[0062] In an implementable manner, when the switching instruction is the third instruction, the method further includes: opening the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve in the air conditioning module of the thermal management system, and closing the second cut-off valve, the third cut-off valve, and the third electronic expansion valve to dissipate the heat in the thermal management system to the air through the radiator; or, opening the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air conditioning module of the thermal management system, and closing the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve to recover the heat in the air to the thermal management system through the radiator.

[0063] Among them, for example Figure 4 As shown, after the thermal management controller receives the third instruction, while controlling the A-B connection, D-E connection, and C cut-off of the five-way valve, controlling SOV1 to be opened, SOV2 to be closed, SOV3 to be closed, EXV1 to be opened, EXV2 to be opened, and EXV3 to be closed, the electric drive module, the air conditioning module, and the battery module are connected in sequence. At this time, heat exchange can occur between the electric drive module, the air conditioning module, and the battery module. That is, after starting the compressor CMPSR, the air conditioning module cools, the electric drive module cools, and the battery module cools, and the hot air in the thermal management system is dissipated to the air by using the radiator to achieve the functions of cockpit heating and battery cooling.

[0064] Among them, for example Figure 4 As shown, after the thermal management controller receives the third instruction, while controlling the A-B connection, D-E connection, and C cut-off of the five-way valve, controlling SOV1 to be closed, SOV2 to be opened, SOV3 to be opened, EXV1 to be closed, EXV2 to be closed, and EXV3 to be opened, so that the electric drive module is connected to the air conditioning module, and the battery module is not connected to the air conditioning module. At this time, heat exchange can occur between the electric drive module and the air conditioning module. That is, after starting the compressor CMPSR, the air conditioning module heats, and the heat in the air is recovered by using the radiator to prevent the first heat exchanger from frosting, so as to achieve the function of heat pump recovering air heat.

[0065] It should be noted that the thermal management system provided in this application can provide a relatively flexible thermal management mode. In addition to the above-mentioned several modes, the thermal management system can also have more thermal management modes. Next, this application will give more examples of this:

[0066] In one mode, the thermal management controller controls the A-B connection and D-E connection of the five-way valve, and C is cut off, and controls SOV1 to open, SOV2 to close, SOV3 to close, EXV1 to open, EXV2 to close, and EXV3 to close. After the compressor CMPSR is started, the air-conditioning module performs refrigeration and the electric drive module performs cooling to achieve the cockpit refrigeration function.

[0067] In another mode, the thermal management controller controls the A-B connection and D-E connection of the five-way valve, and C is cut off, and controls SOV1 to open, SOV2 to close, SOV3 to close, EXV1 to close, EXV2 to open, and EXV3 to close. After the compressor CMPSR is started, the battery is cooled to achieve the battery cooling function.

[0068] In another mode, the thermal management controller controls the A-B connection and C-E connection of the five-way valve, and D is cut off, and controls SOV1 to close, SOV2 to open, SOV3 to open, EXV1 to open, EXV2 to close, and EXV3 to close. After the compressor CMPSR is started, the air-conditioning module performs refrigeration and heating, and the electric drive module stores heat to achieve the cockpit dehumidification function.

[0069] In another mode, the thermal management controller controls the A-B connection and C-E connection of the five-way valve, and D is cut off, and controls SOV1 to close, SOV2 to open, SOV3 to open, EXV1 to open, EXV2 to close, and EXV3 to open. After the compressor CMPSR is started, the air-conditioning module performs refrigeration and heating, and the electric drive module is cooled to achieve the cockpit dehumidification function.

[0070] In another mode, the thermal management controller controls the A-B connection and C-E connection of the five-way valve, and D is cut off, and controls SOV1 to close, SOV2 to open, SOV3 to open, EXV1 to open, EXV2 to open, and EXV3 to open. After the compressor CMPSR is started, the air-conditioning module performs refrigeration and heating, the electric drive module is cooled, and the battery is cooled to achieve the cockpit dehumidification function.

[0071] In another mode, the thermal management controller controls the A-B connection and D-E connection of the five-way valve, cuts off C, and controls SOV1 to close, SOV2 to open, SOV3 to open, EXV1 to close, EXV2 to close, and EXV3 to open. After the compressor CMPSR is started, the air-conditioning module performs heating and the electric drive module performs cooling to achieve the cockpit heating function.

[0072] In another mode, the thermal management controller controls the A-B connection and C-E connection of the five-way valve, cuts off D, and controls SOV1 to close, SOV2 to open, SOV3 to open, EXV1 to close, EXV2 to open, and EXV3 to open. After the compressor CMPSR is started, the air-conditioning module performs heating, the electric drive module performs heat storage, and the battery module performs cooling to achieve the cockpit heating function.

[0073] In another mode, the thermal management controller controls the A-E connection and B-C connection of the five-way valve, cuts off D, and controls SOV1 to close, SOV2 to open, SOV3 to open, EXV1 to close, EXV2 to close, and EXV3 to open. After the compressor CMPSR is started, the air-conditioning module performs heating, the electric drive module is blocked, and the battery module is heated to achieve the cockpit heating function.

[0074] In another mode, the thermal management controller controls the A-B connection and C-E connection of the five-way valve, cuts off D, and controls SOV1 to close, SOV2 to open, SOV3 to close, EXV1 to close, EXV2 to open, and EXV3 to close. After the compressor CMPSR is started, the air-conditioning module performs heating and the battery module performs cooling to achieve the cockpit heat storage function.

[0075] In another mode, the thermal management controller controls the A-B connection and D-E connection of the five-way valve, cuts off C, and controls SOV1 to open, SOV2 to close, SOV3 to close, EXV1 to close, EXV2 to close, and EXV3 to close. When the compressor CMPSR is in the off state, the electric drive module is blocked to achieve the defrosting function.

[0076] In another embodiment, the present application also provides a thermal management controller. Refer to Figure 7 .. Embodiments of the present application can divide the functions of the device according to the above method examples. For example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation. As Figure 7As shown, the thermal management controller includes a receiving unit 710 and a control unit 720. Specifically: The receiving unit 710 is configured to receive a switching instruction, where the switching instruction is used to indicate a switch of the thermal management mode; The control unit 720 is configured to connect the first port and the second port of the five-way valve, and connect the third port and the fifth port, and cut off the fourth port when the switching instruction is the first instruction, so that the radiator is disconnected to perform internal heat exchange; The control unit 720 is further configured to connect the first port and the fifth port of the five-way valve, and connect the second port and the third port, and cut off the fourth port when the switching instruction is the second instruction, so that the electric drive module and the battery module in the thermal management system are connected to perform heat exchange; The control unit 720 is further configured to connect the first port and the second port of the five-way valve, and connect the fourth port and the fifth port, and cut off the third port when the switching instruction is the third instruction, so that the radiator is connected to perform external heat exchange.

[0077] In an implementable embodiment, when the switching instruction is the first instruction, the control unit 720 is further configured to: open the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and close the first cut-off valve, the first electronic expansion valve, and the second expansion valve, so as to store the waste heat of the motor by using the first heat exchanger.

[0078] In an implementable embodiment, when the switching instruction is the second instruction, the control unit 720 is further configured to: open the first cut-off valve and the first electronic expansion valve in the air-conditioning module of the thermal management system, and close the second cut-off valve, the third cut-off valve, the second electronic expansion valve, and the third electronic expansion valve, so that the battery module and the electric drive module in the thermal management system are connected in series to heat the battery pack in the battery module by using the waste heat of the electric drive.

[0079] In an implementable embodiment, when the switching instruction is the third instruction, the control unit 720 is further configured to: open the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve in the air-conditioning module of the thermal management system, and close the second cut-off valve, the third cut-off valve, and the third electronic expansion valve, so as to dissipate the heat in the thermal management system into the air through the radiator; or, open the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and close the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve, so as to recover the heat in the air into the thermal management system through the radiator.

[0080] In another embodiment, the present application further provides a thermal management controller. Refer to Figure 8As shown in the figure, the thermal management controller in this embodiment may include: a processor 810, a transceiver 820, and a memory 830. The above-mentioned processor 810 and memory 830 are connected through a bus 840. The processor 810 is configured to execute multiple instructions; the transceiver 820 is configured to perform data interaction with other devices; the memory 830 is configured to store multiple instructions, and the instructions are adapted to be loaded and executed by the processor 810 for the thermal management system as described in the above embodiment.

[0081] Among them, the processor 810 may be an Electronic Control Unit (ECU), a central processing unit (CPU), a general-purpose processor, a coprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The processor 810 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of 5SP and a microprocessor, etc. In this embodiment, the processor 810 may adopt a single-chip microcomputer, and various control functions can be realized by programming the single-chip microcomputer. For example, in this embodiment, functions such as switching multiple thermal management modes can be realized. The processor has the advantages of powerful computing ability and fast processing speed. Specifically: the transceiver 820 is configured to perform the function of the receiving unit 710 and is configured to receive a switching instruction, where the switching instruction is used to indicate switching of the thermal management mode. The processor 810 is configured to perform the function of the control unit 720 and is configured to: when the switching instruction is the first instruction, connect the first port and the second port of the five-way valve, and connect the third port and the fifth port, and cut off the fourth port, so that the radiator is disconnected for internal heat exchange; when the switching instruction is the second instruction, connect the first port and the fifth port of the five-way valve, and connect the second port and the third port, and cut off the fourth port, so that the electric drive module in the thermal management system is connected to the battery module for heat exchange; when the switching instruction is the third instruction, connect the first port and the second port of the five-way valve, and connect the fourth port and the fifth port, and cut off the third port, so that the radiator is connected for external heat exchange.

[0082] In one implementable manner, when the switching instruction is the first instruction, the processor 810 is further configured to: turn on the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and turn off the first cut-off valve, the first electronic expansion valve, and the second expansion valve, so as to store the waste heat of the motor by using the first heat exchanger.

[0083] In one implementable manner, when the switching instruction is the second instruction, the processor 810 is further configured to: turn on the first cut-off valve and the first electronic expansion valve in the air-conditioning module of the thermal management system, and turn off the second cut-off valve, the third cut-off valve, the second electronic expansion valve, and the third electronic expansion valve, so that the battery module and the electric drive module in the thermal management system are connected in series, so as to heat the battery pack in the battery module by using the waste heat of the electric drive.

[0084] In one implementable manner, when the switching instruction is the third instruction, the processor 810 is further configured to: turn on the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve in the air-conditioning module of the thermal management system, and turn off the second cut-off valve, the third cut-off valve, and the third electronic expansion valve, so as to dissipate the heat in the thermal management system into the air through the radiator; or, turn on the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and turn off the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve, so as to recover the heat in the air into the thermal management system through the radiator.

[0085] In one implementable manner, the present application further provides a computer-readable storage medium, in which multiple instructions are stored, and the instructions are suitable for being loaded and executed by a processor to perform the methods in any of the foregoing embodiments. A processor for executing multiple instructions; a memory for storing multiple instructions, and the instructions are suitable for being loaded and executed by the processor to perform the thermal management method as described in the above embodiments.

[0086] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0087] The above embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A thermal management system, characterized in that, it includes: an electric drive module, an air conditioning module, a battery module, and a multi-way valve for connecting the electric drive module and the battery module. When the multi-way valve connects the electric drive module and the battery module, the waste heat generated by the electric drive module is used to heat the battery module; wherein, the electric drive module is connected to the air conditioning module through a first heat exchanger, and the air conditioning module is connected to the battery module through a second heat exchanger; wherein, the water side of the first heat exchanger is located inside the electric drive module, and the refrigerant side of the first heat exchanger is located inside the air conditioning module; the water side of the second heat exchanger is located inside the battery module, and the refrigerant side of the second heat exchanger is located inside the air conditioning module; the air conditioning module further includes an air conditioning assembly, a compressor, a first electronic expansion valve, a second electronic expansion valve, a third electronic expansion valve, a first stop valve, a second stop valve, a third stop valve, a check valve, a liquid receiver drier, a first coaxial tube, and a second coaxial tube; the air conditioning assembly includes a warm air device, an internal condenser, and an evaporator; wherein, one end of the internal condenser of the air conditioning assembly is connected to one end of the third stop valve and one end of the first coaxial tube respectively through the compressor, and the other end of the internal condenser of the air conditioning assembly is connected to one end of the first stop valve and one end of the second stop valve respectively; wherein, one end of the refrigerant side of the first heat exchanger is connected to the other end of the third stop valve and the other end of the first stop valve respectively, and the other end of the refrigerant side of the first heat exchanger is connected to one end of the third electronic expansion valve and the water inlet of the check valve respectively; the water outlet of the check valve is connected to the other end of the second stop valve and one end of the liquid receiver drier respectively; the other end of the third electronic expansion valve is connected to the other end of the liquid receiver drier and one end of the second coaxial tube respectively; wherein, one end of the evaporator of the air conditioning assembly is connected to the other end of the second coaxial tube and one end of the second electronic expansion valve respectively through the first electronic expansion valve; wherein, one end of the refrigerant side of the second heat exchanger is connected to the other end of the second electronic expansion valve, and the other end of the refrigerant side of the second heat exchanger is connected to the other end of the evaporator of the air conditioning assembly and the other end of the first coaxial tube respectively.

2. The thermal management system according to claim 1, characterized in that, the multi-way valve is a five-way valve with five ports. The thermal management system further includes a first electric water pump and a second electric water pump. The electric drive module further includes a motor and a radiator, and the battery module further includes a battery pack; wherein, the first port of the five-way valve is connected to one end of the water side of the second heat exchanger, the second port of the five-way valve is connected to one end of the battery pack through the second electric water pump, and the other end of the water side of the second heat exchanger is connected to the other end of the battery pack; Wherein, the third port of the five-way valve is connected to the water side of the first heat exchanger, the motor, and one end of the radiator; the fourth port of the five-way valve is connected to the other end of the radiator in the electric drive module; the fifth port of the five-way valve is connected to the water side of the first heat exchanger and the other end of the motor through the first electronic water pump.

3. The thermal management system according to claim 2, characterized in that the electric drive module further includes an expansion tank; wherein, one end of the expansion tank is connected to the water side of the first heat exchanger and one end of the motor, and the other end of the expansion tank is connected to the water side of the first heat exchanger and the other end of the motor through the first electronic water pump.

4. A thermal management method, which is used for thermal management of the thermal management system according to any one of claims 1 to 3, characterized in that it includes: receiving a switching instruction, wherein the switching instruction is used to indicate switching of the thermal management mode; when the switching instruction is the first instruction, connecting the first port and the second port of the five-way valve, and connecting the third port and the fifth port, and blocking the fourth port, so that the radiator is disconnected for internal heat exchange; when the switching instruction is the second instruction, connecting the first port and the fifth port of the five-way valve, and connecting the second port and the third port, and blocking the fourth port, so that the electric drive module in the thermal management system is connected to the battery module for heat exchange; when the switching instruction is the third instruction, connecting the first port and the second port of the five-way valve, and connecting the fourth port and the fifth port, and blocking the third port, so that the radiator is connected for external heat exchange.

5. The method according to claim 4, characterized in that when the switching instruction is the first instruction, the method further includes: opening the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and closing the first cut-off valve, the first electronic expansion valve, and the second expansion valve, so as to store the waste heat of the motor by using the first heat exchanger.

6. The method according to claim 4, characterized in that when the switching instruction is the second instruction, the method further includes: opening the first cut-off valve and the first electronic expansion valve in the air-conditioning module of the thermal management system, and closing the second cut-off valve, the third cut-off valve, the second electronic expansion valve, and the third electronic expansion valve, so that the battery module in the thermal management system is connected in series with the electric drive module to heat the battery pack in the battery module by using the waste heat of the electric drive.

7. The method according to claim 4, characterized in that when the switching instruction is the third instruction, the method further includes: opening the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve in the air-conditioning module of the thermal management system, and closing the second cut-off valve, the third cut-off valve, and the third electronic expansion valve, so as to dissipate the heat in the thermal management system into the air through the radiator; Alternatively, open the second cut-off valve, the third cut-off valve, and the third electronic expansion valve in the air-conditioning module of the thermal management system, and close the first cut-off valve, the first electronic expansion valve, and the second electronic expansion valve, so as to recover the heat in the air to the thermal management system through the radiator.

8. A thermal management controller for performing the thermal management method according to any one of claims 4 to 7, characterized in that it includes: a receiving unit for receiving a switching instruction, wherein the switching instruction is used to indicate switching of the thermal management mode; a control unit for connecting the first port and the second port of the five-way valve, connecting the third port and the fifth port, and blocking the fourth port when the switching instruction is a first instruction, so that the radiator is disconnected for internal heat exchange; The control unit is further configured to connect the first port and the fifth port of the five-way valve, connect the second port and the third port, and block the fourth port when the switching instruction is a second instruction, so that the electric drive module and the battery module in the thermal management system are connected for heat exchange; The control unit is further configured to connect the first port and the second port of the five-way valve, connect the fourth port and the fifth port, and block the third port when the switching instruction is a third instruction, so that the radiator is connected for external heat exchange.

9. A thermal management controller, characterized in that the thermal management controller includes a processor, a transceiver, and a memory, and the processor, the transceiver, and the memory are connected through a bus; the processor is configured to execute multiple instructions; the transceiver is configured to perform data interaction with other devices; the memory is configured to store the multiple instructions, and the instructions are adapted to be loaded and executed by the processor to perform the thermal management method according to any one of claims 4 to 7.

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