A dual-mode cooling integrated thermal management system, hybrid aircraft, and method

Abstract

This invention relates to the field of aviation thermal management system technology, specifically to a split-flow dual-mode integrated thermal management system, a hybrid aircraft, and a method. The split-flow dual-mode integrated thermal management system includes a refrigerant heat conduction circuit and an evaporative cooling cycle circuit. The refrigerant heat conduction circuit includes a liquid-cooled pump, a power battery heat conduction channel, a distributor, a storage tank, a starter generator heat conduction channel, and a liquid-cooled radiator; the evaporative cooling cycle circuit includes a compressor, a condenser, a throttle valve, and an evaporator connected in sequence; the split-flow dual-mode integrated thermal management system includes a hybrid cooling mode; the refrigerant flow circuit of the refrigerant heat conduction circuit in the hybrid cooling mode includes a first sub-circuit and a second sub-circuit; this solves the problem of high power and low power-to-weight ratio in battery thermal management systems with high evaporative cycle power.

Description

Technical Field

[0001] This invention relates to the field of aviation thermal management system technology, and more specifically, to a split-flow dual-mode cooling integrated thermal management system, a hybrid aircraft, and a method thereof. Background Technology

[0002] In fields such as vehicle thermal management systems, the thermal management performance of power batteries directly affects their safety, cycle life, and operating efficiency. Meanwhile, battery-related equipment, such as motor controllers, also generates significant heat during operation, requiring efficient heat dissipation in sync with the power battery. To achieve integrated thermal management, existing technologies often employ a design where an evaporative cycle is nested within the battery thermal management loop. This allows for simultaneous cooling of the power battery and related equipment within the same thermal management system, simplifying the system structure and reducing space requirements. However, existing nested evaporative cycle thermal management systems typically require high-power evaporative cycle components to meet the total heat dissipation demands of the power battery and related equipment. This not only increases system energy consumption and manufacturing costs but also limits the lightweight design of the equipment, making it difficult to meet current development demands for efficient, compact, and lightweight thermal management systems.

[0003] Therefore, optimizing the structural design of the evaporative cycle nested thermal management system while ensuring the cooling effect of the power battery and supporting equipment, thereby reducing system power consumption and improving the power-to-weight ratio, has become an urgent technical problem to be solved. Summary of the Invention

[0004] To address the issues of high evaporative cycle power and low power-to-weight ratio in battery thermal management systems, this invention provides a shunt dual-mode cooling integrated thermal management system, a hybrid aircraft, and a method.

[0005] In a first aspect, the present invention provides a split-flow dual-mode refrigeration integrated thermal management system, which includes:

[0006] A refrigerant heat conduction circuit includes a liquid-cooled pump, a power battery heat conduction channel, a distributor, a storage tank, a starter generator heat conduction channel, and a liquid-cooled radiator; the power battery heat conduction channel, the starter generator heat conduction channel, and the storage tank are respectively connected to the distributor; the inlet of the liquid-cooled radiator, the storage tank, and the liquid-cooled pump are connected in sequence;

[0007] An evaporative cooling cycle includes a compressor, a condenser, a throttling valve, and an evaporator connected in sequence; the evaporator is connected to the heat conduction channel of the power battery.

[0008] The dual-mode refrigeration integrated thermal management system includes a hybrid refrigeration mode. In the hybrid refrigeration mode, the evaporation cycle refrigeration circuit is activated, and the outlet of the liquid cooling pump, the evaporator, and the power battery heat conduction channel are connected in sequence. The generator heat conduction channel is connected to the liquid cooling radiator.

[0009] The refrigerant flow circuit of the refrigerant heat conduction circuit in the hybrid refrigeration mode includes a first sub-circuit and a second sub-circuit.

[0010] The first sub-circuit includes a flow that sequentially passes from the storage tank through the liquid cooling pump, the evaporator, the power battery heat conduction channel, and the splitter before returning to the storage tank;

[0011] The second sub-circuit includes a flow that sequentially passes from the storage tank through the liquid cooling pump, the evaporator, the power battery heat conduction channel, the starter generator heat conduction channel, and the liquid cooling radiator before returning to the storage tank.

[0012] In some embodiments, the refrigerant heat transfer circuit further includes a regulating valve; the regulating valve is connected between the storage tank and the distributor;

[0013] In the hybrid cooling mode, the regulating valve adjusts its opening according to the temperature of the power battery heat conduction channel to increase the temperature of the refrigerant flowing through the liquid cooler.

[0014] The dual-mode refrigeration integrated thermal management system also includes a direct air cooling mode;

[0015] In the direct air cooling mode, the regulating valve is closed, and the evaporative cooling cycle circuit is shut down.

[0016] In some embodiments, the refrigerant heat conduction circuit further includes a controller heat conduction channel; the controller heat conduction channel is connected between the shunt of the second sub-circuit and the liquid-cooled radiator.

[0017] In some embodiments, the split-flow dual-mode refrigeration integrated thermal management system further includes a gas turbine heat dissipation circuit, which includes a gas turbine heat conduction channel, a regenerator, a lubricating oil radiator, and a lubricating oil pump connected in sequence; the outlet of the lubricating oil pump is connected to the inlet of the gas turbine heat conduction channel.

[0018] The dual-mode refrigeration integrated thermal management system also includes a heating mode; in the heating mode, the evaporation cycle refrigeration circuit is closed, the regulating valve is closed, the gas turbine heat dissipation circuit is open, and the refrigerant in the refrigerant heat conduction circuit flows from the storage tank through the liquid cooling pump, the regenerator, the generator heat conduction channel, the controller heat conduction channel, the power battery heat conduction channel and the liquid cooling radiator before returning to the storage tank.

[0019] In some embodiments, the refrigerant heat transfer circuit further includes a multi-way valve; the liquid cooling pump, the regenerator, the generator heat transfer channel, the evaporator, and the liquid cooling radiator are respectively connected to the multi-way valve;

[0020] In the hybrid cooling mode or the direct air cooling mode, the liquid cooling pump is connected to the evaporator through the multi-way valve, and the generator heat conduction channel is connected to the liquid cooling radiator through the multi-way valve;

[0021] In the heating mode, the liquid cooling pump is connected to the heat conduction channel of the generator through the multi-way valve, and the evaporator is connected to the liquid cooling radiator through the multi-way valve.

[0022] In some embodiments, the split-flow dual-mode cooling integrated thermal management system further includes a fan; the fan's air outlet direction is toward the oil radiator, the condenser, and the liquid radiator; the distance between the oil radiator, the condenser, and the liquid radiator and the fan decreases sequentially.

[0023] In a second aspect, the present invention provides a hybrid aircraft, which includes the split-mode dual-cooling integrated thermal management system described in any embodiment of the first aspect.

[0024] The hybrid aircraft also includes a fuselage, a gas turbine engine, and a power battery; the split-mode dual-mode integrated thermal management system, the gas turbine engine, and the power battery are respectively connected to the fuselage.

[0025] Thirdly, the present invention provides a thermal management control method for a hybrid aircraft, wherein the thermal management control method for a hybrid aircraft is applied to a hybrid aircraft as described in the second aspect.

[0026] The hybrid aircraft thermal management control method includes:

[0027] The operating temperature of the power battery is acquired in real time at a preset frequency;

[0028] Based on the operating temperature being greater than or equal to the first threshold, the dual-mode refrigeration integrated thermal management system is controlled to activate the hybrid refrigeration mode.

[0029] In some embodiments, the refrigerant heat transfer circuit further includes a regulating valve; the regulating valve is connected between the storage tank and the distributor;

[0030] In the hybrid cooling mode, the regulating valve adjusts its opening according to the temperature of the power battery heat conduction channel to increase the temperature of the refrigerant flowing through the liquid cooler.

[0031] The hybrid aircraft thermal management control method also includes:

[0032] Since the hybrid cooling mode is in the active state, the opening degree of the regulating valve is adjusted according to the operating temperature; wherein, the opening degree of the regulating valve is negatively correlated with the operating temperature.

[0033] In some embodiments, the split-flow dual-mode refrigeration integrated thermal management system further includes an air direct cooling mode;

[0034] In the direct air cooling mode, the regulating valve is closed, and the evaporative cooling cycle circuit is shut down.

[0035] The hybrid aircraft thermal management control method also includes:

[0036] Based on the operating temperature being greater than the second threshold and less than the first threshold, the dual-mode refrigeration integrated thermal management system is controlled to activate the direct air cooling mode.

[0037] In some embodiments, the split-flow dual-mode refrigeration integrated thermal management system further includes a controller heat conduction channel; the controller heat conduction channel is connected between the splitter of the second sub-loop and the liquid-cooled radiator;

[0038] The dual-mode refrigeration integrated thermal management system further includes a gas turbine heat dissipation circuit, which includes a gas turbine heat conduction channel, a regenerator, a lubricating oil radiator, and a lubricating oil pump connected in sequence; the outlet of the lubricating oil pump is connected to the inlet of the gas turbine heat conduction channel.

[0039] The dual-mode refrigeration integrated thermal management system also includes a heating mode; in the heating mode, the evaporation cycle refrigeration circuit is closed, the regulating valve is closed, the gas turbine heat dissipation circuit is open, and the refrigerant in the refrigerant heat conduction circuit flows from the storage tank through the liquid cooling pump, the regenerator, the generator heat conduction channel, the controller heat conduction channel, the power battery heat conduction channel and the liquid cooling radiator before returning to the storage tank;

[0040] The hybrid aircraft thermal management control method also includes:

[0041] Based on the fact that the operating temperature is below the third threshold, the dual-mode refrigeration integrated thermal management system is controlled to activate the heating mode.

[0042] To address the issues of high evaporation cycle power and low power-to-weight ratio in battery thermal management systems, this invention offers the following advantages:

[0043] By setting up a refrigerant heat conduction circuit and an evaporative cooling circuit, the evaporative cooling circuit is activated in the hybrid cooling mode. The liquid cooling pump outlet, evaporator, and power battery heat conduction channel are connected sequentially, and the starter's heat conduction channel is connected to the liquid-cooled radiator. The refrigerant forms a first sub-circuit and a second sub-circuit. In the first sub-circuit, the refrigerant flows back to the storage tank after passing through the storage tank, liquid cooling pump, evaporator, power battery heat conduction channel, and distributor. In the second sub-circuit, the refrigerant flows back to the storage tank after passing through the storage tank, liquid cooling pump, evaporator, power battery heat conduction channel, distributor, starter's heat conduction channel, and liquid-cooled radiator. The distributor diverts the refrigerant to decouple the cooling needs of the power battery and the starter, and the liquid-cooled radiator is cooled by natural cold source. This allows the refrigerant to cool the power battery or the power battery and generator through the combined action of the evaporator and liquid cooling radiator. It also utilizes a natural cold source to cool battery-related equipment with high temperature tolerance, such as the generator. The natural cold source simultaneously provides some cooling capacity to the battery. The evaporative cooling cycle circuit is only activated to supplement cooling capacity under extremely hot conditions. This significantly reduces the evaporative cycle power, power consumption, and weight of the evaporative cooling cycle circuit. Therefore, this invention has a high energy efficiency and possesses the technical advantage of a high power-to-weight ratio in the aerospace field. Attached Figure Description

[0044] Figure 1 This diagram illustrates the state of the split-flow dual-mode refrigeration integrated thermal management system of Embodiment 1 in either hybrid refrigeration mode or direct air cooling mode.

[0045] Figure 2 This diagram illustrates the state of the split-flow dual-mode cooling integrated thermal management system in heating mode according to Embodiment 1.

[0046] Figure 3 A flowchart illustrating the thermal management control method for a hybrid aircraft according to Embodiment 3 is shown.

[0047] Figure reference numerals: 10 Refrigerant heat conduction circuit; 11 Liquid cooling pump; 12 Power battery heat conduction channel; 13 Distributor; 14 Storage tank; 15 Generator heat conduction channel; 16 Liquid cooling radiator; 17 Regulating valve; 18 Controller heat conduction channel; 19 Multi-way valve; 20 Evaporator cycle refrigeration circuit; 21 Compressor; 22 Condenser; 23 Throttling valve; 24 Evaporator; 30 Gas turbine heat dissipation circuit; 31 Gas turbine heat conduction channel; 32 Regenerator; 33 Lubricating oil radiator; 34 Lubricating oil pump; 40 Fan. Detailed Implementation

[0048] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0049] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0050] In the field of thermal management for transportation vehicles, the performance of power battery thermal management directly affects its safety, lifespan, and efficiency. Supporting equipment such as motor controllers also generate heat during operation, requiring simultaneous and efficient heat dissipation. Existing integrated thermal management systems often employ a scheme where an evaporative cycle is nested within the battery thermal management loop to simultaneously cool both and simplify the structure. However, this scheme requires high-power evaporative cycle components to meet the overall heat dissipation demands, resulting in high system power density, low power-to-weight ratio, increased energy consumption and manufacturing costs, and limitations on lightweight design, making it difficult to meet the development requirements of high efficiency, compactness, and lightweight design. To address the issues of high evaporative cycle power and low power-to-weight ratio in battery thermal management systems, this invention provides a shunt dual-mode cooling integrated thermal management system, a hybrid aircraft, and a method.

[0051] Example 1:

[0052] This embodiment provides a split-flow dual-mode cooling integrated thermal management system, such as...Figure 1 As shown, a split-flow dual-mode refrigeration integrated thermal management system includes a refrigerant heat conduction circuit 10 and an evaporation cycle refrigeration circuit 20. Figure 1 The arrows indicate the direction of flow for the refrigerant, coolant, or lubricating oil. Dashed lines indicate that the valves in this pipeline are closed and not conducting.

[0053] The refrigerant heat conduction circuit 10 includes a liquid cooling pump 11, a power battery heat conduction channel 12, a distributor 13, a storage tank 14, a starter generator heat conduction channel 15, and a liquid cooling radiator 16. The storage tank 14 stores refrigerant, which can heat or cool the power battery when it flows through the power battery heat conduction channel 12. The power battery heat conduction channel 12, the starter generator heat conduction channel 15, and the storage tank 14 are respectively connected to the distributor 13, so that the refrigerant flowing through the power battery can flow back to the storage tank 14 from the distributor 13, and flow to the starter generator heat conduction channel 15 from the other side. The inlets of the liquid-cooled radiator 16, the storage tank 14, and the liquid-cooled pump 11 are connected in sequence. After the refrigerant is cooled in the liquid-cooled radiator 16, it flows into the storage tank 14 for storage. Then, the liquid-cooled pump 11 pumps the refrigerant in the storage tank 14 into the refrigerant heat conduction circuit 10. The liquid-cooled radiator 16 is located in a natural cold source, which can be air.

[0054] The evaporative cooling cycle 20 includes a compressor 21, a condenser 22, a throttling valve 23, and an evaporator 24 connected in sequence. Refrigerant flows within the evaporative cooling cycle 20. The boiling point of the refrigerant is proportional to its pressure; under high pressure, it can absorb more heat without undergoing a phase change. The low-pressure, low-temperature refrigerant liquid absorbs heat in the evaporator 24, becoming a low-pressure, high-temperature gas. It is then pressurized by the compressor 21 into a high-pressure, high-temperature gas, and enters the condenser 22 to release heat into the surrounding cooler air or other environment, becoming a high-pressure, room-temperature liquid. It then passes through the throttling valve 23 to reduce its pressure and temperature, returning to a low-pressure, low-temperature liquid state before entering the evaporator 24 to absorb heat and begin the next cycle. The evaporator 24 is connected to the power battery heat conduction channel 12. Thus, when the refrigerant flows through the evaporator 24, the heat is absorbed by the refrigerant, allowing the refrigerant to flow into the power battery heat conduction channel 12 at a lower temperature, thereby absorbing heat from the power battery and cooling it.

[0055] The dual-mode cooling integrated thermal management system includes a hybrid cooling mode. The power battery operates under extremely hot conditions, necessitating the use of this hybrid cooling mode. In this mode, the evaporative cooling loop 20 is activated, and the outlet of the liquid cooling pump 11, the evaporator 24, and the power battery heat conduction channel 12 are sequentially connected. This allows the refrigerant to be pumped out by the liquid cooling pump 11, and its temperature decreases as it flows through the evaporator 24, thus lowering the power battery temperature as it flows through the power battery heat conduction channel 12. The starter generator heat conduction channel 15 is connected to the liquid cooling radiator 16.

[0056] The refrigerant flow circuit of the refrigerant heat conduction circuit 10 in the hybrid refrigeration mode includes a first sub-circuit and a second sub-circuit.

[0057] The first sub-circuit includes the refrigerant flowing from the storage tank 14 through the liquid cooling pump 11, the evaporator 24, the power battery heat conduction channel 12 and the distributor 13, and then flowing back to the storage tank 14 to start the next cycle; that is, the refrigerant in the first sub-circuit can reduce the temperature of the power battery through the cooling effect of the evaporator 24.

[0058] The second sub-loop includes a refrigerant flowing from the storage tank 14 sequentially through the liquid-cooled pump 11, evaporator 24, power battery heat conduction channel 12, distributor 13, starter generator heat conduction channel 15, and liquid-cooled radiator 16 before returning to the storage tank 14 to begin the next cycle. This ensures that after the refrigerant lowers the temperature of the power battery, the heat from the refrigerant flowing from the liquid-cooled pump 11 into the evaporator 24 is absorbed by the refrigerant within the evaporator 24, thus cooling the refrigerant. The refrigerant then flows out of the evaporator 24 at a lower temperature into the power battery heat conduction channel 12, further cooling the power battery. As the refrigerant continues to flow along the second sub-loop through the liquid-cooled radiator 16, it is also cooled, allowing it to return to the storage tank 14 at an even lower temperature. In simple terms, the refrigerant in the second sub-circuit can lower the temperature of the power battery and starter generator through the cooling effect of the evaporator 24 and the liquid-cooled radiator 16, while the refrigerant in the first sub-circuit can only lower the temperature of the power battery through the cooling effect of the evaporator 24. This makes the cooling capacity of the second sub-circuit greater than that of the first sub-circuit. Since the starter generator has a higher tolerance to high temperatures in the operating environment than the power battery, battery-related equipment such as the starter generator mainly relies on natural cold sources for cooling. The distributor 13 reduces the flow rate of refrigerant through the starter generator, allowing the smaller flow rate of refrigerant to generate a higher temperature, thereby increasing the temperature difference with the ambient temperature. This fully utilizes natural cold sources for cooling, shares the power consumption of the evaporative cooling cycle, and reduces the weight of the evaporative cooling cycle refrigeration circuit 20.

[0059] In this hybrid cooling mode, the temperature of the power battery and starter generator can be lowered through the flow of refrigerant in the first and second sub-circuits, as well as the cooling effect of the evaporator 24 and the liquid-cooled radiator 16. This avoids the problem of the evaporative cooling circuit 20 being nested within the battery thermal management circuit, simultaneously cooling the power battery and starter generator, resulting in high evaporative cycle power and low power-to-weight ratio.

[0060] The refrigerant flowing through the power battery is diverted by the shunt 13, thereby decoupling the cooling requirements of the power battery and the starter generator. The liquid-cooled radiator 16 is used for cooling in a natural cold source, which cools battery-related equipment such as the starter generator with high temperature tolerance and provides some cooling capacity to the power battery. The evaporative cooling circuit 20 is only turned on under extremely hot conditions to supplement the cooling capacity of the power battery, which greatly reduces the cooling power and power consumption of the evaporative cycle, improves the energy efficiency ratio, and has the technical advantage of high power-to-weight ratio in the aviation field.

[0061] Furthermore, such as Figure 1 As shown, the refrigerant heat transfer circuit 10 also includes a regulating valve 17; the regulating valve 17 is connected between the storage tank 14 and the distributor 13.

[0062] In the hybrid cooling mode, the regulating valve 17 adjusts its opening according to the temperature of the power battery heat conduction channel 12 to increase the temperature of the refrigerant flowing through the generator heat conduction channel 15, thereby increasing the temperature of the refrigerant flowing through the liquid cooler radiator 16. When the power battery temperature is low, the temperature of the refrigerant flowing out of the power battery heat conduction channel 12 is also low. At this time, increasing the opening of the regulating valve 17 can increase the flow rate of the refrigerant flowing directly back into the storage tank 14 from the distributor 13, and reduce the flow rate of the refrigerant entering the generator heat conduction channel 15. This allows less refrigerant to absorb the heat from the generator, and the temperature of the refrigerant flowing through the liquid cooler radiator 16 can be raised as high as possible to the maximum allowable temperature. This increases the temperature difference between the refrigerant and the natural cold source where the liquid cooler radiator 16 is located, so as to make full use of the natural cold source for heat dissipation.

[0063] When the power battery temperature is high, the temperature of the refrigerant flowing out of the power battery heat conduction channel 12 is also high. At this time, reducing the opening of the regulating valve 17 can reduce the flow rate of the refrigerant entering the storage tank 14 and increase the flow rate of the refrigerant entering the generator heat conduction channel 15. This not only allows the refrigerant flowing through the generator heat conduction channel 15 to rise to the maximum allowable temperature, but also has a large flow rate. This makes the temperature difference between the refrigerant flowing through the liquid cooler radiator 16 and the natural cold source reach its maximum, and the refrigerant flow rate is large, thereby maximizing the cooling effect of the natural cold source and greatly reducing the power of the evaporative cooling cycle.

[0064] This invention, based on the opening of the temperature regulating valve 17 of the power battery heat conduction channel 12, can maximize the flow rate while ensuring a large temperature difference between the refrigerant in the liquid-cooled radiator 16 and the surrounding natural cold source. This improves the heat dissipation efficiency of the liquid-cooled radiator 16, thereby significantly reducing the cooling power, power consumption, and weight of the evaporative cooling cycle, and increasing the power-to-weight ratio of the split-flow dual-mode cooling integrated thermal management system. Figure 1As shown, the dual-mode cooling integrated thermal management system also includes a direct air cooling mode; when the heat dissipation demand of the power battery is small, the evaporative cooling circuit 20 can be shut down and the direct air cooling mode can be adopted.

[0065] In direct air cooling mode, regulating valve 17 is closed, and evaporative cooling cycle circuit 20 is shut down. This means that only the refrigerant in the second sub-circuit is used to lower the temperature of the power battery and generator through the cooling effect of the liquid-cooled radiator 16. In direct air cooling mode, the power consumption of evaporative cooling cycle circuit 20 is zero, thereby further improving the energy efficiency ratio of the thermal management system.

[0066] Furthermore, such as Figure 1 As shown, the refrigerant heat conduction circuit 10 also includes a controller heat conduction channel 18. The controller heat conduction channel 18 is connected between the shunt 13 and the liquid-cooled radiator 16 in the second sub-circuit. That is, the controller heat conduction channel 18 can be connected between the starter heat conduction channel 15 and the shunt 13, or it can be connected between the starter heat conduction channel 15 and the liquid-cooled radiator 16, thus utilizing the second sub-circuit to cool the controller. Both the controller and the starter are auxiliary devices for the power battery. This invention can decouple the cooling requirements of the power battery and the auxiliary devices, making full use of natural cold sources to reduce the power-to-weight ratio of the thermal management system.

[0067] Furthermore, such as Figure 2 As shown, the dual-mode cooling integrated thermal management system also includes a gas turbine heat dissipation circuit 30. The gas turbine heat dissipation circuit 30 includes a gas turbine heat conduction channel 31, a regenerator 32, a lubricating oil radiator 33, and a lubricating oil pump 34 connected in sequence. Lubricating oil flows in the gas turbine heat dissipation circuit 30. The regenerator 32 can recover the heat from the gas turbine heat conduction channel 31 to heat the power battery. The outlet of the lubricating oil pump 34 is connected to the inlet of the gas turbine heat conduction channel 31. In this way, the lubricating oil pump 34 can be used to pass the lubricating oil into the gas turbine heat conduction channel 31 and carry the heat generated after the gas turbine is turned on into the regenerator 32. When the temperature of the lubricating oil flowing out of the regenerator 32 is high, it can dissipate the heat when flowing through the lubricating oil radiator 33.

[0068] The dual-mode cooling integrated thermal management system also includes a heating mode; when the ambient temperature is low, such as in winter, the heating mode is activated because the power battery should avoid working under low temperature conditions. Figure 2The arrows indicate the direction of refrigerant, coolant, or lubricating oil flow, while the dashed lines indicate that the valves in this pipeline are closed and not conducting. In heating mode, the evaporator cooling circuit 20 is closed, the regulating valve 17 is closed, and the gas turbine cooling circuit 30 is open. The refrigerant in the refrigerant heat conduction circuit 10 flows from the storage tank 14 through the liquid-cooled pump 11, the regenerator 32, the generator heat conduction channel 15, the controller heat conduction channel 18, the power battery heat conduction channel 12, and the liquid-cooled radiator 16 before returning to the storage tank 14. In this way, in heating mode, the refrigerant carries the heat from the regenerator 32 into the power battery heat conduction channel 12, thereby heating the power battery and enabling it to operate normally above the minimum allowable operating temperature, thus improving the power battery's efficiency.

[0069] Furthermore, the refrigerant heat transfer circuit 10 also includes a multi-way valve 19, which can be a four-way valve, a five-way valve, etc. A four-way valve is preferred. The liquid-cooled pump 11, the regenerator 32, the generator heat transfer channel 15, the evaporator 24, and the liquid-cooled radiator 16 are respectively connected to the multi-way valve 19;

[0070] When the multi-way valve 19 is a four-way valve, the outlet of the liquid cooling pump 11 and the outlet of the regenerator 32 can be combined and then connected to the four-way valve. That is, the outlet of the liquid cooling pump 11 can be connected to the regenerator 32, or the outlet of the liquid cooling pump 11 can be directly connected to the multi-way valve 19. In some embodiments, the refrigerant heat transfer circuit 10 also includes a three-way valve; the outlet of the liquid cooling pump 11 is connected to the inlet of the three-way valve; the two outlets of the three-way valve are respectively connected to the regenerator 32 and the multi-way valve 19. The outlet of the liquid cooling pump 11 switches the flow direction through the three-way valve.

[0071] like Figure 1 As shown, in the hybrid cooling mode or the direct air cooling mode, the liquid cooling pump 11 is connected to the evaporator 24 through the multi-way valve 19, and the generator heat conduction channel 15 is connected to the liquid cooling radiator 16 through the multi-way valve 19; in this way, the power battery, controller and generator can be cooled through the refrigerant heat conduction circuit 10 and the evaporation cycle cooling circuit 20, or only through the refrigerant heat conduction circuit 10.

[0072] like Figure 2 As shown, in heating mode, the liquid-cooled pump 11 is connected to the generator heat conduction channel 15 via a multi-way valve 19, and the evaporator 24 is connected to the liquid-cooled radiator 16 via the multi-way valve 19. This allows the refrigerant to transfer heat from the regenerator 32 in the gas turbine cooling circuit 30 into the refrigerant heat conduction circuit 10, heating the power battery and its associated equipment, enabling the power battery and its associated equipment to operate normally within a suitable ambient temperature range.

[0073] Furthermore, such as Figure 2As shown, the split-flow dual-mode cooling integrated thermal management system also includes a fan 40; the airflow direction of the fan 40 is towards the oil radiator 33, the condenser 22, and the liquid radiator 16; the distance between the oil radiator 33, the condenser 22, and the liquid radiator 16 and the fan 40 decreases sequentially. This allows the fan 40 to enhance the heat dissipation effect of the oil radiator 33, the condenser 22, and the liquid radiator 16 on the split-flow dual-mode cooling integrated thermal management system. Furthermore, this arrangement of using a single fan 40 to blow air onto the three heat dissipation devices reduces the space occupied by the fan 40 in the split-flow dual-mode cooling integrated thermal management system, meeting the requirements of miniaturization design.

[0074] Example 2:

[0075] This embodiment provides a hybrid aircraft, which includes the split-mode dual-cooling integrated thermal management system of any one of the embodiments in Example 1. The hybrid aircraft also includes a fuselage, a gas turbine engine, and a power battery; the split-mode dual-cooling integrated thermal management system, the gas turbine engine, and the power battery are respectively connected to the fuselage. When the split-mode dual-cooling integrated thermal management system of the hybrid aircraft is in heating mode, the heat from the gas turbine engine is carried along the gas turbine heat dissipation circuit 30 to the power battery heat conduction channel 12 via the gas turbine heat conduction channel 31, thus heating the power battery; it can also be used to cool the power battery, controller, and starter generator using the evaporator 24 and liquid-cooled radiator 16 when the split-mode dual-cooling integrated thermal management system is in mixed cooling mode; and it uses the liquid-cooled radiator 16 to cool the power battery, controller, and starter generator when the split-mode dual-cooling integrated thermal management system is in direct air cooling mode.

[0076] Example 3:

[0077] This embodiment provides a thermal management control method for a hybrid aircraft, which is applied to a hybrid aircraft in Embodiment 2. For example... Figure 3 As shown, the thermal management control method for hybrid aircraft includes steps S10-S20, which are explained in detail below:

[0078] Step S10: Obtain the operating temperature of the power battery in real time at a preset frequency;

[0079] Step S20: Based on the operating temperature being greater than or equal to the first threshold, the shunt dual-mode cooling integrated thermal management system is controlled to activate the hybrid cooling mode. Since the first threshold temperature is very high, the hybrid cooling mode is activated, using the refrigerant heat conduction circuit 10 and the evaporative cooling circuit 20 to maximize the cooling of the power battery, thus achieving the maximum cooling power of the shunt dual-mode cooling integrated thermal management system.

[0080] Furthermore, such as Figure 1As shown, the refrigerant heat transfer circuit 10 also includes a regulating valve 17; the regulating valve 17 is connected between the storage tank 14 and the distributor 13.

[0081] In the hybrid cooling mode, the regulating valve 17 adjusts its opening according to the temperature of the power battery heat conduction channel 12 to increase the temperature of the refrigerant flowing through the liquid cooler 16.

[0082] The hybrid aircraft thermal management control method also includes step S30:

[0083] With the hybrid cooling mode activated, the opening of regulating valve 17 is adjusted according to the operating temperature; the opening of regulating valve 17 is negatively correlated with the operating temperature. This allows regulating valve 17 to adjust its opening based on the temperature of the power battery heat conduction channel 12, ensuring a large temperature difference between the refrigerant in the liquid-cooled radiator 16 and the surrounding natural cold source, regardless of whether the power battery temperature is high or low. It also maximizes the flow rate through the liquid-cooled radiator 16, thereby maximizing its heat dissipation efficiency and improving the power-to-weight ratio of the dual-mode cooling integrated thermal management system.

[0084] Furthermore, the split-flow dual-mode refrigeration integrated thermal management system also includes a direct air cooling mode;

[0085] In direct air cooling mode, regulating valve 17 is closed and evaporative cooling circuit 20 is closed;

[0086] The hybrid aircraft thermal management control method also includes step S40:

[0087] Based on the operating temperature being greater than the second threshold but less than the first threshold, the control system for the dual-mode cooling integrated thermal management system activates the direct air cooling mode. Only the liquid-cooled radiator 16 in the second sub-loop is used to cool the power battery. This allows other cooling devices to be shut down when the power battery's operating temperature is greater than the second threshold but less than the first threshold, thereby reducing the hybrid aircraft's power consumption.

[0088] Furthermore, the split-flow dual-mode refrigeration integrated thermal management system also includes a controller heat conduction channel 18; the controller heat conduction channel 18 is connected between the splitter 13 and the liquid-cooled radiator 16 in the second sub-loop;

[0089] The split-flow dual-mode refrigeration integrated thermal management system also includes a gas turbine heat dissipation circuit 30, which includes a gas turbine heat conduction channel 31, a regenerator 32, a lubricating oil radiator 33 and a lubricating oil pump 34 connected in sequence; the outlet of the lubricating oil pump 34 is connected to the inlet of the gas turbine heat conduction channel 31.

[0090] The dual-mode refrigeration integrated thermal management system also includes a heating mode. In the heating mode, the evaporation cycle refrigeration circuit 20 is closed, the regulating valve 17 is closed, the gas turbine heat dissipation circuit 30 is opened, and the refrigerant in the refrigerant heat conduction circuit 10 flows from the storage tank 14 through the liquid cooling pump 11, the regenerator 32, the generator heat conduction channel 15, the controller heat conduction channel 18, the power battery heat conduction channel 12, and the liquid cooling radiator 16 before flowing back to the storage tank 14.

[0091] The hybrid aircraft thermal management control method also includes step S50:

[0092] Based on the operating temperature being lower than the third threshold, the control shunt dual-mode cooling integrated thermal management system is activated to start the heating mode. Since the third threshold is lower than the second threshold, the power battery cannot be used normally due to the low temperature. Therefore, the heating mode needs to be activated. The heat generated by the gas turbine engine of the hybrid aircraft is carried into the heat conduction channel 12 of the power battery through the lubricating oil, thereby heating the power battery so that it can work normally.

[0093] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A split dual-mode refrigeration integrated thermal management system, characterized in that, The split dual-mode refrigeration comprehensive thermal management system comprises: A coolant conduction loop comprising a liquid cooling pump, a power battery conduction flow channel, a flow divider, a storage tank, a starter generator conduction flow channel and a liquid cooling radiator; the power battery conduction flow channel, the starter generator conduction flow channel and the storage tank are in communication with the flow divider respectively; the liquid cooling radiator, the storage tank and an inlet of the liquid cooling pump are in communication in sequence; An evaporation cycle refrigeration loop comprising a compressor, a condenser, a throttling valve and an evaporator in communication in sequence; the evaporator is in communication with the power battery conduction flow channel; The split dual-mode refrigeration comprehensive thermal management system comprises a hybrid refrigeration mode; in the hybrid refrigeration mode, the evaporation cycle refrigeration loop is opened, an outlet of the liquid cooling pump, the evaporator and the power battery conduction flow channel are in communication in sequence, and the starter generator conduction flow channel is in communication with the liquid cooling radiator; The coolant flow loop of the coolant conduction loop in the hybrid refrigeration mode comprises a first sub-loop and a second sub-loop; The first sub-loop comprises a flow from the storage tank to the liquid cooling pump, the evaporator, the power battery conduction flow channel and the flow divider in sequence and then back to the storage tank; The second sub-loop comprises a flow from the storage tank to the liquid cooling pump, the evaporator, the power battery conduction flow channel, the starter generator conduction flow channel and the liquid cooling radiator in sequence and then back to the storage tank.

2. The split dual-mode refrigeration comprehensive thermal management system according to claim 1, wherein The coolant conduction loop further comprises a regulating valve; the regulating valve is in communication between the storage tank and the flow divider; In the hybrid refrigeration mode, the regulating valve adjusts the opening degree according to the temperature of the power battery conduction flow channel to increase the temperature of the coolant flowing through the liquid cooling radiator; The split dual-mode refrigeration comprehensive thermal management system further comprises an air direct cooling mode; In the air direct cooling mode, the regulating valve is closed and the evaporation cycle refrigeration loop is closed.

3. The split dual-mode refrigeration comprehensive thermal management system according to claim 2, wherein The coolant conduction loop further comprises a controller conduction flow channel; the controller conduction flow channel is in communication between the flow divider of the second sub-loop and the liquid cooling radiator.

4. The split dual-mode refrigeration comprehensive thermal management system according to claim 3, wherein The split dual-mode refrigeration comprehensive thermal management system further comprises an engine heat dissipation loop comprising an engine conduction flow channel, a regenerator, an oil cooler and an oil pump in communication in sequence; an outlet of the oil pump is in communication with an inlet of the engine conduction flow channel; The split dual-mode refrigeration comprehensive thermal management system further comprises a heat supply mode; in the heat supply mode, the evaporation cycle refrigeration loop is closed, the regulating valve is closed, the engine heat dissipation loop is opened, and the coolant of the coolant conduction loop flows from the storage tank to the liquid cooling pump, the regenerator, the starter generator conduction flow channel, the controller conduction flow channel, the power battery conduction flow channel and the liquid cooling radiator in sequence and then back to the storage tank.

5. The split-flow dual-mode refrigeration comprehensive thermal management system according to claim 4, wherein the heat-conducting loop of the secondary refrigerant further comprises a multi-way valve; the liquid cooling pump, the regenerator, the heat-conducting flow channel of the starter generator, the evaporator and the liquid cooling radiator are respectively communicated with the multi-way valve; in the hybrid refrigeration mode or the air direct cooling mode, the liquid cooling pump is communicated with the evaporator through the multi-way valve, and the heat-conducting flow channel of the starter generator is communicated with the liquid cooling radiator through the multi-way valve; in the heating mode, the liquid cooling pump is communicated with the heat-conducting flow channel of the starter generator through the multi-way valve, and the evaporator is communicated with the liquid cooling radiator through the multi-way valve.

6. The split-flow dual-mode refrigeration comprehensive thermal management system according to claim 4, wherein the split-flow dual-mode refrigeration comprehensive thermal management system further comprises a fan; the air outlet direction of the fan is towards the lubricating oil radiator, the condenser and the liquid cooling radiator; the distances between the lubricating oil radiator, the condenser and the liquid cooling radiator and the fan are sequentially decreased.

7. A hybrid aircraft, comprising the split-flow dual-mode refrigeration comprehensive thermal management system according to any one of claims 1-6, a fuselage, a gas turbine engine and a power battery; the split-flow dual-mode refrigeration comprehensive thermal management system, the gas turbine engine and the power battery are respectively connected with the fuselage.

8. A hybrid aircraft thermal management control method, applied to the hybrid aircraft according to claim 7, comprising: acquiring the working temperature of the power battery in real time at a preset frequency; based on the working temperature being greater than or equal to a first threshold value, controlling the split-flow dual-mode refrigeration comprehensive thermal management system to start the hybrid refrigeration mode.

9. The hybrid aircraft thermal management control method according to claim 8, wherein the heat-conducting loop of the secondary refrigerant further comprises a regulating valve; the regulating valve is communicated between the storage tank and the flow divider; in the hybrid refrigeration mode, the regulating valve adjusts the opening degree according to the temperature of the heat-conducting flow channel of the power battery, so as to increase the temperature of the secondary refrigerant flowing through the liquid cooling radiator; the hybrid aircraft thermal management control method further comprises: based on the hybrid refrigeration mode being in the starting state, adjusting the opening degree of the regulating valve according to the working temperature; wherein the opening degree of the regulating valve is negatively correlated with the working temperature.

10. The hybrid aircraft thermal management control method according to claim 9, wherein the split-flow dual-mode refrigeration comprehensive thermal management system further comprises an air direct cooling mode; in the air direct cooling mode, the regulating valve is closed, and the evaporative refrigeration cycle is closed; the hybrid aircraft thermal management control method further comprises: based on the working temperature being greater than a second threshold value and less than the first threshold value, controlling the split-flow dual-mode refrigeration comprehensive thermal management system to start the air direct cooling mode.

11. The hybrid aircraft thermal management control method according to claim 9, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The shunt dual-mode refrigeration comprehensive thermal management system further comprises a controller heat conduction channel; the controller heat conduction channel is communicated between the shunt of the second sub-circuit and the liquid cooling radiator; The shunt dual-mode refrigeration comprehensive thermal management system further comprises a combustion engine heat dissipation circuit, which comprises a combustion engine heat conduction channel, a regenerator, an oil cooler and an oil pump communicated in sequence; the outlet of the oil pump is communicated with the inlet of the combustion engine heat conduction channel; The shunt dual-mode refrigeration comprehensive thermal management system further comprises a heating mode; in the heating mode, the evaporation cycle refrigeration circuit is closed, the adjusting valve is closed, the combustion engine heat dissipation circuit is opened, and the heat carrier of the heat carrier heat conduction circuit flows from the storage tank to the liquid cooling pump, the regenerator, the starter generator heat conduction channel, the controller heat conduction channel, the power battery heat conduction channel and the liquid cooling radiator in sequence and then returns to the storage tank; The hybrid aircraft thermal management control method further comprises: Based on the working temperature being lower than the third threshold value, the shunt dual-mode refrigeration comprehensive thermal management system is controlled to open the heating mode.

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