Thermal management system, temperature control system and thermal management method of eVTOL battery

Abstract

The invention discloses a thermal management system, a temperature control system and a thermal management method of an eVTOL battery, and relates to the technical field of aircrafts, the thermal management system comprises at least one battery loop, a cooling loop, a heating loop and an adjusting part, the battery loop comprises at least two battery packs arranged on an airframe, and the at least two battery packs are connected in parallel through a cooling liquid pipeline; the cooling liquid pipeline is used for circulating cooling liquid, the cooling loop is arranged on the machine body or the ground, can be connected with the battery loop in series through the cooling liquid pipeline and is used for cooling the battery pack, and the heating loop is arranged on the machine body or the ground, can be connected with the battery loop in series through the cooling liquid pipeline and is used for preserving heat or heating the battery pack. The adjusting part can control the connection and disconnection between the cooling loop and the battery loop and between the heating loop and the battery loop, so that cooling, heat preservation or heating of the battery pack is achieved, effective heat management of the battery pack can be achieved, and the use safety of the aircraft is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft, and particularly to a thermal management system, a temperature control system and a thermal management method for an eVTOL battery. Background Art

[0002] An eVTOL (Electric Vertical Take-off and Landing) is an air traffic device that can take off and land vertically like a helicopter through electric drive, and can take off and land in a limited urban space without relying on a runway. It has great advantages in point-to-point short-distance transportation (such as low-altitude sightseeing, urban travel, etc.). Especially in the event of a disaster or emergency, it can reach areas that are difficult for traditional means of transportation to reach efficiently and quickly.

[0003] During the flight of the aircraft, the battery discharge generates heat. If the battery temperature is too high and lasts for a long time, it will affect the service life of the battery, and also affect the battery discharge efficiency. In severe cases, a thermal runaway problem will occur, affecting the use safety of the aircraft and posing a certain safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to provide a thermal management system, a temperature control system and a thermal management method for an eVTOL battery, which can effectively manage the heat of the battery pack in the aircraft body, thereby being conducive to ensuring the use safety of the aircraft.

[0005] The present invention provides a thermal management system for an eVTOL battery, including: At least one battery circuit, including at least two battery packs arranged on the aircraft body, and the at least two battery packs are connected in parallel through a coolant pipeline, and the coolant pipeline is used for circulating coolant. A cooling circuit, arranged on the aircraft body or the ground, and can be connected in series with the battery circuit through the coolant pipeline, for cooling the battery pack. A heating circuit, arranged on the aircraft body or the ground, and can be connected in series with the battery circuit through the coolant pipeline, for keeping the battery pack warm or heating it. And an adjusting member, which can control the on-off between the cooling circuit and the heating circuit and the battery circuit to realize cooling, heat preservation or heating of the battery pack.

[0006] In one embodiment, the cooling circuit includes a refrigerating member, a heat exchanging member and a power pump. The heat exchanging member and the power pump are connected in series through the coolant pipeline. When the temperature of the battery pack is greater than or equal to the first set temperature T1, the refrigerating member cooperates with the heat exchanging member to cool the coolant in the coolant pipeline.

[0007] In one embodiment, the heating circuit includes a power pump and a heating element connected in series through the coolant pipeline. When the temperature of the battery pack is lower than or equal to the second set temperature T2, the heating element heats the coolant in the coolant pipeline.

[0008] In one embodiment, at least two of the power pumps are connected to the coolant inlet side or the outlet side of the battery circuit, and at least two of the power pumps are connected in parallel.

[0009] In one embodiment, when the number of the battery circuits is at least two, at least two of the battery circuits are connected in parallel. One of the power pumps is connected to the coolant inlet side or the outlet side of each of the battery circuits. The battery circuits are communicated with each other through a connecting pipeline for circulating the coolant. The connection between the connecting pipeline and the battery circuit is located on the outlet side of the power pump.

[0010] In one embodiment, when both the cooling circuit and the heating circuit are arranged on the ground, the coolant in the coolant pipeline of the battery circuit does not flow, or the battery circuit includes at least one power pump connected in series with the battery circuit. When the number of the power pumps is at least two, at least two of the power pumps are configured to be connected in parallel.

[0011] In one embodiment, at least two of the battery packs are symmetrically distributed on the left and right sides of the body.

[0012] In one embodiment, when the number of the battery circuits is at least two, the number of the battery packs connected in parallel in the battery circuits is the same.

[0013] The present invention also provides a temperature control system for an eVTOL battery, which is applied to the thermal management system of the above-mentioned eVTOL battery and includes: A measurement module for measuring the temperature of the battery pack and the temperature of the coolant inlet side and / or the outlet side of the battery pack. A control module is communicatively connected to the measurement module and the regulating member. The measurement module can feedback the detected temperature information to the control module in real time. The control module receives the temperature information and sends a control instruction to the regulating member to make the regulating member work, so that the cooling circuit is connected in series with the battery circuit, or the heating circuit is connected in series with the battery circuit.

[0014] The present invention also provides a thermal management method for an eVTOL battery, which is applied to the thermal management system of the above-mentioned eVTOL battery and / or the temperature control system of the above-mentioned eVTOL battery, and includes at least one of the following steps: Based on the cooling circuit being arranged on the body and the temperature of the battery pack being greater than or equal to the first set temperature T1, the cooling circuit is connected in series with the battery circuit, and the cooling circuit cools the battery pack; Based on the cooling circuit being disposed on the ground, the airframe being located on the ground, and the temperature of the battery pack being greater than or equal to the first set temperature T1, the cooling circuit is connected in series with the battery circuit, and the cooling circuit cools the battery pack; Based on the heating circuit being disposed on the airframe and the temperature of the battery pack being less than or equal to the second set temperature T2, the heating circuit is connected in series with the battery circuit, and the heating circuit keeps the battery pack warm or heats it; Based on the heating circuit being disposed on the ground, the airframe being located on the ground, and the temperature of the battery pack being less than or equal to the second set temperature T2, the heating circuit is connected in series with the battery circuit, and the heating circuit keeps the battery pack warm or heats it.

[0015] The beneficial effects of the thermal management system, temperature control system, and thermal management method of the eVTOL battery of the present invention are as follows: The setting of the cooling circuit can cool the battery pack so that the temperature of the battery pack does not become too high to affect the charge and discharge efficiency, effectively avoiding the problem that the battery pack is prone to thermal runaway, ensuring the safe use of the battery pack. When the cooling circuit is disposed on the airframe, it has the immediacy of the battery pack cooling function, enabling the cooling function to be realized both when the airframe is in flight or on the ground, thereby avoiding the working temperature of the battery pack from being too high, which is beneficial to increasing the endurance of the airframe. When the cooling circuit is disposed on the ground, it can realize the cooling function when the airframe is on the ground, which is beneficial to reducing the weight of the airframe, especially having good applicability for short-distance transportation, and reducing the input cost of the airframe; The setting of the heating circuit can keep the battery pack warm or heat it so that the temperature of the battery pack does not become too low to affect the charge and discharge efficiency. When the heating circuit is disposed on the airframe, it has the immediacy of the battery pack heating function, enabling the heat preservation or heating function to be realized both when the airframe is in flight or on the ground, thereby enabling the battery pack to be in a better charge and discharge state, which is beneficial to extending the service life of the battery pack and increasing the endurance of the airframe. When the heating circuit is disposed on the ground, it can reduce the weight of the airframe, especially having good applicability for short-distance transportation, and reducing the input cost of the airframe; The setting of the adjusting member enables the battery circuit to be connected in series with the cooling circuit to cool the battery pack in the battery circuit that needs to be cooled through the cooling circuit, and enables the battery circuit to be connected in series with the heating circuit to heat the battery pack in the battery circuit that needs to be heated through the heating circuit, thereby realizing the thermal management of the battery pack, which is beneficial to ensuring that the battery pack has better charge and discharge efficiency, ensuring that the battery pack is in a safe working environment, and improving the use safety of the aircraft. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the body of an embodiment of the present invention; Figure 2 Schematic diagram of the thermal management system of an embodiment of the present invention; Figure 3 Schematic diagram of the connection between the battery circuit and the cooling circuit of an embodiment of the present invention; Figure 4 Schematic diagram of the connection between the battery circuit and the heating circuit of an embodiment of the present invention; Figure 5 Another schematic diagram of the connection between the battery circuit and the heating circuit of an embodiment of the present invention; Figure 6 Schematic diagram of the thermal management system of another embodiment of the present invention; Figure 7 Schematic diagram of the thermal management system of yet another embodiment of the present invention; Figure 8 Schematic diagram of the thermal management system of still another embodiment of the present invention; Figure 9 Schematic diagram of the principle of the temperature control system of an embodiment of the present invention.

[0018] In the figure: 10 - body; 101 - battery circuit; 102 - connecting pipe; 11 - battery pack; 12 - adjusting member; 13 - refrigerating member; 14 - heat exchange member; 15 - power pump; 16 - heating member; 17 - valve member; 18 - one-way check valve; 19 - liquid storage pot; 20 - integrated system; 21 - temperature measuring member; 22 - measuring module; 23 - control module. Specific embodiments

[0019] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the description of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Unless otherwise expressly specified and defined, terms such as "arranged", "installed", "connected", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0021] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is only for the convenience of description and simplification of 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, and therefore cannot be construed as a limitation on the present invention.

[0022] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0023] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to the elements listed, it may also include other elements not expressly listed.

[0024] As Figure 1 shown, the thermal management system of the eVTOL battery proposed by the present invention is used to perform thermal management on at least two battery packs 11 arranged on the airframe 10 to control the temperature of the battery packs 11, and the at least two battery packs 11 are used to provide power for the airframe 10.

[0025] Referring Figure 1 and Figure 2 , the thermal management system of the eVTOL battery proposed by the present invention includes: At least one battery circuit 101, including at least two battery packs 11 arranged on the airframe 10, and the at least two battery packs 11 are connected in parallel through a coolant pipeline, and the coolant pipeline is used for circulating coolant. A cooling circuit, arranged on the airframe 10 or on the ground, capable of being connected in series with the battery circuit 101 through a coolant pipeline, and used for cooling the battery packs 11. A heating circuit, arranged on the airframe 10 or on the ground, capable of being connected in series with the battery circuit 101 through a coolant pipeline, and used for heat preservation or heating of the battery packs 11. An adjusting member 12, capable of controlling the on-off between the cooling circuit and the heating circuit and the battery circuit 101 to achieve cooling, heat preservation or heating of the battery packs 11.

[0026] The cooling circuit is provided to cool the battery pack 11, so that the temperature of the battery pack 11 will not be too high to affect the charge and discharge efficiency, effectively avoiding the problem that the battery pack 11 is prone to thermal runaway, ensuring the safe use of the battery pack 11. When the cooling circuit is provided on the body 10, it has the immediacy of the battery pack 11 cooling function, enabling the cooling function to be realized whether the body 10 is in flight or on the ground, thus avoiding the working temperature of the battery pack 11 from being too high, which is beneficial to increasing the endurance mileage of the body 10. When the cooling circuit is provided on the ground, it can realize the cooling function when the body 10 is on the ground, which is beneficial to reducing the weight of the body 10, especially having good applicability for short-distance transportation and reducing the input cost of the body 10; The heating circuit is provided to keep the battery pack 11 warm or heat it, so that the temperature of the battery pack 11 will not be too low to affect the charge and discharge efficiency. When the heating circuit is provided on the body 10, it has the immediacy of the battery pack 11 heating function, enabling the warming or heating function to be realized whether the body 10 is in flight or on the ground, thus enabling the battery pack 11 to be in a better charge and discharge state, which is beneficial to extending the service life of the battery pack 11 and increasing the endurance mileage of the body 10. When the heating circuit is provided on the ground, it can reduce the weight of the body 10, especially having good applicability for short-distance transportation and reducing the input cost of the body 10; The setting of the adjusting member 12 enables the battery circuit 101 to be connected in series with the cooling circuit to cool the battery pack 11 required in the battery circuit 101 through the cooling circuit, and enables the battery circuit 101 to be connected in series with the heating circuit to heat the battery pack 11 required in the battery circuit 101 through the heating circuit, thereby realizing the thermal management of the battery pack 11, which is beneficial to ensuring that the battery pack 11 has better charge and discharge efficiency and ensuring that the battery pack 11 is in a safe working environment, improving the use safety of the aircraft.

[0027] In one embodiment, as Figure 1 shown, the number of at least two battery packs 11 is even and is configured to be symmetrically distributed on the left and right sides of the body 10 to ensure the overall balance of the body 10. Exemplarily, the number of battery packs 11 is set to six, and the six battery packs 11 are symmetrically arranged on the left and right sides of the body 10, that is, three battery packs 11 are provided on each of the left and right sides of the body 10. With this setting, it can not only provide sufficient power support for the endurance mileage of the body 10, but also ensure the balance performance of the body 10.

[0028] In one embodiment, the battery pack 11 is internally provided with battery cells and a liquid cooling plate. The liquid cooling plate includes an inlet and an outlet that can communicate with a coolant pipeline, so that coolant can flow inside the liquid cooling plate, and a coolant circulation is formed through the inlet and the outlet. The liquid cooling plate is used to exchange heat with the battery cells to cooperate with the cooling circuit and the heating circuit to control and regulate the temperature of the battery cells. It can be understood that the series or parallel connection of the aforementioned battery pack 11 refers to the connection with the liquid cooling plate to achieve coolant circulation, rather than the electrical connection with the battery cells.

[0029] In one embodiment, the coolant adopts a mixture of ethylene glycol and water.

[0030] In one embodiment, as Figure 2 shown, the battery circuit 101 further includes valve members 17 having the same number as the battery packs 11. Each valve member 17 is connected in series with a battery pack 11. The valve member 17 is used to control the on-off of the coolant of the battery pack 11 connected in series therewith. When the battery pack 11 needs to be cooled, insulated or heated, the valve member 17 is opened to connect the battery pack 11 with the heating circuit or the cooling circuit. When a battery pack 11 fails or undergoes thermal runaway, the valve member 17 can cut off the circuit to prevent the battery pack 11 from affecting other battery packs 11, which is beneficial to minimizing the loss of the entire thermal management system. Exemplarily, the valve member 17 adopts a on-off valve.

[0031] In one embodiment, in combination with Figure 2 and Figure 3 , the cooling circuit includes a refrigerating member 13, a heat exchanging member 14 and a power pump 15. The heat exchanging member 14 and the power pump 15 are connected in series through a coolant pipeline to achieve the circulation of the coolant. The refrigerating member 13 is arranged on the body 10 or the ground. When the temperature of the battery pack 11 is greater than or equal to the first set temperature T1, the refrigerating member 13 cooperates with the heat exchanging member 14 to cool the coolant flowing through the heat exchanging member 14. The power pump 15 is used to provide power for the coolant in the coolant pipeline to make the coolant in the coolant pipeline flow. The coolant cooled by the heat exchanging member 14 flows through the battery circuit 101 under the drive of the power pump 15 to cool the required battery packs 11 to prevent the temperature of the battery packs 11 from being too high.

[0032] Figure 3 The bold lines in Figure 3, when the temperature of the battery pack 11 is greater than or equal to the first set temperature T1, the regulating member 12 is put into operation to connect the cooling circuit in series with the battery circuit 101, so as to realize the circulation of the coolant. The refrigerating member 13, the heat exchanging member 14 and the power pump 15 operate to reduce the temperature of the coolant flowing through the heat exchanging member 14. The power pump 15 causes the coolant to flow to the battery circuit 101 to cool the required battery pack 11. The coolant transfers the heat of the battery pack 11 to the heat exchanging member 14, and then cooling is carried out through the cooperation of the refrigerating member 13 and the heat exchanging member 14 to complete the circulation of the coolant.

[0033] Exemplarily, when the battery pack 11 is in a discharging state, the first set temperature T1 can be set according to the optimal discharging temperature of the battery pack 11; when the battery pack 11 is in a charging state, the first set temperature T1 can be set according to the optimal charging temperature of the battery pack 11.

[0034] Exemplarily, when the cooling circuit is arranged on the body 10, the refrigerating member 13 can adopt the air conditioning system on the body 10.

[0035] In one embodiment, in combination with Figure 2 and Figure 4 , the heating circuit includes a power pump 15 and a heating member 16 connected in series through a coolant pipeline. The power pump 15 is used to provide power for the coolant in the coolant pipeline to make the coolant in the coolant pipeline flow. When the temperature of the battery pack 11 is less than or equal to the second set temperature T2, the heating member 16 is used to heat the coolant flowing through it. The heated coolant flows through the battery circuit 101 under the drive of the power pump 15 to heat or keep warm the required battery pack 11, so as to avoid the temperature of the battery pack 11 being too low.

[0036] Figure 4 The bold lines in Figure 4 indicate the flow circulation of the coolant. Referring to

[0037] When the temperature of the battery pack 11 is lower than or equal to the second set temperature T2, the regulating member 12 is put into operation to connect the heating circuit in series with the battery circuit 101, so as to realize the circulation of the coolant. The heating member 16 and the power pump 15 operate to increase the temperature of the coolant flowing through the heating member 16. The power pump 15 causes the coolant to flow to the battery circuit 101 to heat or keep warm the required battery pack 11. The coolant that has absorbed heat from the battery pack 11 returns to the heating member 16 for reheating to complete the circulation of the coolant. Exemplarily, when the cooling circuit and the heating circuit are both arranged in the body 10 or on the ground simultaneously, they share the power pump 15, and the regulating member 12 is arranged on the inlet side of the power pump 15. With such an arrangement, the number of power pumps 15 put into use can be saved, which is beneficial to reducing the overall weight of the body 10 and the production cost. Of course, the power pumps 15 for the cooling circuit and the heating circuit can also be set separately.

[0038] Exemplarily, the regulating member 12 is a reversing valve.

[0039] Exemplarily, as Figure 1 shown, a one-way check valve 18 is arranged on the inlet side of the power pump 15 to ensure that the coolant in the coolant pipeline can only flow in a single direction, avoiding the problem of coolant backflow, which is beneficial to ensuring the temperature regulation efficiency of the battery pack 11.

[0040] In one embodiment, as Figure 6 shown, the number of the battery circuits 101 is set to be at least one, and at least two power pumps 15 are connected to the coolant inlet side or the outlet side of the battery circuit 101, and the at least two power pumps 15 are in parallel. With such an arrangement, when one of the power pumps 15 fails, the other power pumps 15 can provide coolant drive for the battery circuit 101 to regulate the temperature of the required battery pack 11, which is beneficial to ensuring the normal operation of the entire thermal management system and increasing the anti-risk ability.

[0041] In another embodiment, referring to Figure 2 and Figure 5 , when the number of the battery circuits 101 is at least two, the at least two battery circuits 101 are in parallel, one power pump 15 is connected to the coolant inlet side or the outlet side of each battery circuit 101, the battery circuits 101 are communicated through a connecting pipeline 102 for circulating the coolant, and the connection part of the connecting pipeline 102 and the battery circuit 101 is located on the outlet side of the power pump 15.

[0042] Referring to Figure 5 , taking two battery circuits 101 and two power pumps 15 (the first power pump 15a and the second power pump 15b) as an example, when the first power pump 15a fails and the second power pump 15b can operate normally, the battery circuit 101 connected to the outlet side of the first power pump 15a loses the coolant drive source. At this time, through the cooperation of the second power pump 15b and the connecting pipeline 102, coolant drive can be provided to the battery circuit 101 connected in series with the first power pump 15a to regulate the temperature of the required battery pack 11, which is beneficial to ensuring the normal operation of the entire thermal management system and increasing the anti-risk ability of the body 10.

[0043] In this embodiment, by arranging at least two battery packs 11 in different battery circuits 101, the load pressure of the power pump 15 on the coolant inlet side of the battery circuit 101 can be reduced, and the failure probability of the power pump 15 can be decreased, which is beneficial to ensuring the normal operation of the entire thermal management system.

[0044] Exemplarily, at least two power pumps 15 can be connected in series in each battery circuit 101, and the at least two power pumps 15 are connected in parallel to increase the risk resistance ability of each battery circuit 101.

[0045] Exemplarily, the number of battery packs 11 connected in parallel in each battery circuit 101 can be the same or different. In a preferred example of this embodiment, the number of battery packs 11 connected in parallel in each battery circuit 101 is the same, and the power pumps 15 can adopt the same model. Especially when the battery packs 11 are symmetrically distributed on the left and right sides of the body 10, the length of the coolant pipeline to be invested can be reduced, which is beneficial to reducing the complexity of the layout of the coolant pipeline.

[0046] In one embodiment, as Figure 2 shown, the coolant pipeline is connected to a liquid storage pot 19, and the liquid storage pot 19 stores coolant. The gas in the coolant pipeline can enter the liquid storage pot 19. At the same time, the coolant in the liquid storage pot 19 can enter the coolant pipeline to realize the exhaust and liquid supplement of the entire thermal management system, and can absorb the volume change brought by the temperature change of the coolant, which is beneficial to ensuring the uniformity of the coolant in the coolant pipeline and ensuring the stability of the pressure in the coolant pipeline, thereby ensuring the temperature regulation and control efficiency of the battery pack 11.

[0047] In one embodiment, as Figure 7 shown, when both the cooling circuit and the heating circuit are arranged on the ground, the cooling circuit and the heating circuit are arranged in the integrated system 20, and the integrated system 20 is located on the ground. When the body 10 is on the ground, the integrated system 20 can be connected in series with the battery circuit 101 through the coolant pipeline to output coolant to the battery circuit 101 to cool, keep warm or heat the required battery packs 11.

[0048] In an example of this embodiment, as Figure 7 shown, no power pump 15 is arranged on the body 10. At this time, the coolant in the coolant pipeline of the battery circuit 101 does not flow, and only the coolant inside the liquid cooling plate is used to realize the temperature regulation of the battery pack 11. This example solution is applicable to short-range application scenarios, can greatly reduce the overall weight and investment cost of the body 10, and can cooperate with the integrated system 20 on the ground to regulate the temperature of the battery pack 11 of the body 10 parked on the ground.

[0049] In another example of this embodiment, as Figure 8As shown, the battery circuit 101 includes at least one power pump 15. The power pump 15 is connected in series with the battery circuit 101. When the number of power pumps 15 is at least two, at least two power pumps 15 are configured to be connected in parallel. Through the power pump 15, the coolant in the coolant pipeline can be driven to flow, so as to cool the required battery pack 11 through the circulation of the coolant, and to ensure that the temperature of the battery pack 11 changes evenly. This exemplary solution is applicable to short-range application scenarios, can minimize the overall weight and investment cost of the body 10, and can cooperate with the ground integrated system 20 to adjust the temperature of the battery pack 11 of the body 10 parked on the ground.

[0050] Before the body 10 takes off, the integrated system 20 can perform thermal management on the battery circuit 101, so that when the body 10 takes off, the battery pack 11 can maintain an appropriate temperature (such as a better discharge temperature); after the body 10 completes the flight and lands, the integrated system 20 can perform thermal management on the battery circuit 101 to avoid the temperature of the battery pack 11 being too high; when the battery pack 11 is being charged, the integrated system 20 can make the battery pack 11 be at an appropriate temperature (such as a better charging temperature).

[0051] In this example, in the same battery circuit 101, each battery pack 11 can be connected in series with a power pump 15 and then connected in parallel with other battery packs 11, or, after each battery pack 11 is connected in parallel, it is then connected in series with the power pump 15. The latter can reduce the weight of the body 10, save investment costs, and has better thermal management efficiency and thermal management reliability.

[0052] In this example, the number of battery circuits 101 is set to at least one, and at least two power pumps 15 are connected to the coolant inlet side or outlet side of the battery circuit 101, and at least two power pumps 15 are connected in parallel. Or, when the number of battery circuits 101 is at least two, at least two battery circuits 101 are connected in parallel, and each battery circuit 101 has a power pump 15 connected to its coolant inlet side or outlet side. The battery circuits 101 are connected through a connection pipeline 102, and the connection point of the connection pipeline 102 and the battery circuit 101 is located on the outlet side of the power pump 15.

[0053] In one embodiment, as Figure 2 shown, the battery circuit 101 further includes a temperature measuring element 21. The temperature measuring element 21 is arranged on the coolant inlet side and / or outlet side of the battery pack 11 to measure the temperature of the coolant entering and / or flowing out of the battery pack 11, so as to facilitate the adjustment of the temperature of the coolant through the cooling circuit and the heating circuit.

[0054] Exemplarily, a temperature measuring element 21 is arranged in the battery pack 11 to detect the temperature of the battery cells.

[0055] In one embodiment, asFigure 2 As shown, the cooling circuit further includes a temperature measuring element 21, which is arranged on the coolant inlet side and / or outlet side of the heat exchanger 14 to measure the temperature of the coolant entering and / or flowing out of the heat exchanger 14, so as to facilitate adjusting the temperature of the coolant through the refrigerating element 13.

[0056] As Figure 9 As shown, the present invention also provides a temperature control system for an eVTOL battery, which is applied to the thermal management system of the above-mentioned eVTOL battery and includes: A measuring module 22, which is used to measure the temperature of the battery pack 11 and the temperature of the coolant inlet side and / or outlet side of the battery pack 11. A control module 23, which is communicatively connected to the measuring module 22 and the adjusting element 12. The measuring module 22 can feedback the detected temperature information to the control module 23 in real time. The control module 23 receives the temperature information and sends a control instruction to the adjusting element 12 to make the adjusting element 12 work, so that the cooling circuit is connected in series with the battery circuit 101, or the heating circuit is connected in series with the battery circuit 101.

[0057] In an embodiment, the control module 23 is communicatively connected to at least two parallel power pumps 15. The power pumps 15 are used to send feedback information to the control module 23. When one of the power pumps 15 fails and thermal management is required in the battery circuit 101 connected in series with it, the control module 23 sends a control instruction to the power pump 15 connected in parallel with it to make the power pump 15 work.

[0058] The present invention also provides a thermal management method for an eVTOL battery, which is applied to the thermal management system of the above-mentioned eVTOL battery and / or the temperature control system of the above-mentioned eVTOL battery, and includes at least one of the following steps: Based on the cooling circuit being arranged on the airframe 10 and the temperature of the battery pack 11 being greater than or equal to the first set temperature T1, the cooling circuit is connected in series with the battery circuit 101, and the cooling circuit cools the battery pack 11. Based on the cooling circuit being arranged on the ground, the airframe 10 being located on the ground, and the temperature of the battery pack 11 being greater than or equal to the first set temperature T1, the cooling circuit is connected in series with the battery circuit 101, and the cooling circuit cools the battery pack 11. Based on the heating circuit being arranged on the airframe 10 and the temperature of the battery pack 11 being less than or equal to the second set temperature T2, the heating circuit is connected in series with the battery circuit 101, and the heating circuit keeps the battery pack 11 warm or heats it. Based on the heating circuit being arranged on the ground, the airframe 10 being located on the ground, and the temperature of the battery pack 11 being less than or equal to the second set temperature T2, the heating circuit is connected in series with the battery circuit 101, and the heating circuit keeps the battery pack 11 warm or heats it.

[0059] In one embodiment, based on Figure 8 the thermal management system in when the aircraft body 10 is in a flight state and the temperature of the battery pack 11 is greater than or equal to the first set temperature T1, the power pump 15 is put into operation to circulate the coolant in the battery circuit 101.

[0060] As mentioned above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A thermal management system for an eVTOL battery, characterized in that: include: At least one battery circuit (101) comprises at least two battery packs (11) arranged on the body (10), at least two of the battery packs (11) being connected in parallel via a coolant pipe, the coolant pipe being used for circulating a coolant, A cooling circuit is provided on the machine body (10) or the ground [S1] and can be connected in series with the battery circuit (101) via a cooling liquid pipeline, and is used to cool the battery pack (11). A heating circuit is provided on the machine body (10) or the ground and can be connected in series with the battery circuit (101) via a coolant pipe, and is used to keep the battery pack (11) warm or to heat it. and an adjusting member (12) capable of controlling the on-off between the cooling circuit and the heating circuit and the battery circuit (101), so as to achieve cooling, heat preservation or heating of the battery pack (11).

2. The thermal management system of the eVTOL battery according to claim 1, characterized in that: The cooling circuit comprises a refrigeration element (13), a heat exchange element (14) and a power pump (15); the heat exchange element (14) and the power pump (15) are connected in series via the coolant pipeline; when the temperature of the battery pack (11) is greater than or equal to a first set temperature T1, [S2] the refrigeration element (13) cooperates with the heat exchange element (14) to cool the coolant in the coolant pipeline.

3. The thermal management system of the eVTOL battery according to claim 1, characterized in that: The heating circuit comprises a power pump (15) and a heating element (16) connected in series through the coolant pipeline. When the temperature of the battery pack (11) is lower than or equal to a second set temperature T2, [S3] the heating element (16) heats the coolant in the coolant pipeline.

4. The thermal management system of the eVTOL battery according to claim 2 or 3, characterized in that: At least two of the power pumps (15) are connected to the coolant inlet side or outlet side of the battery circuit (101), and at least two of the power pumps (15) are connected in parallel.

5. The thermal management system of the eVTOL battery according to claim 2 or 3, characterized in that: When the number of the battery circuits (101) is at least two, at least two of the battery circuits (101) are connected in parallel, and a power pump (15) is connected to the coolant inlet side or outlet side of each of the battery circuits (101). The battery circuits (101) are connected via a connecting pipe (102), and the connecting pipe (102) is used to circulate the coolant. The connection point between the connecting pipe (102) and the battery circuit (101) is located at the outlet side of the power pump (15).

6. The thermal management system of the eVTOL battery according to claim 1, characterized in that: When the cooling circuit and the heating circuit are both arranged on the ground, the coolant in the coolant pipe of the battery circuit (101) does not circulate, or the battery circuit (101) comprises at least one power pump (15), the power pump (15) is connected in series with the battery circuit (101), and when the number of the power pumps (15) is at least two, at least two of the power pumps (15) are configured to be connected in parallel.

7. The thermal management system of the eVTOL battery according to claim 1, characterized in that: At least two of the battery packs (11) are symmetrically distributed on the left and right sides of the machine body (10).

8. The thermal management system of the eVTOL battery according to claim 7, characterized in that: When the number of the battery circuits (101) is at least two, the number of the battery packs (11) connected in parallel in the battery circuits (101) is the same.

9. A temperature control system for an eVTOL battery, characterized in that: A thermal management system for an eVTOL battery according to any one of claims 1 to 8, comprising: A measuring module (22) is used to measure the temperature of the battery pack (11), and is used to measure the temperature of the coolant inlet side and / or outlet side of the battery pack (11). The control module (23) is communicatively connected with the measuring module (22) and the regulating element (12); the measuring module (22) can feed back detected temperature information to the control module (23) in real time; the control module (23) receives the temperature information and sends a control instruction to the regulating element (12) to make the regulating element (12) operate, thereby making the cooling circuit and the battery circuit (101) connected in series, or making the heating circuit and the battery circuit (101) connected in series.

10. A thermal management method for an eVTOL battery, characterized in that: The thermal management system of the eVTOL battery according to any one of claims 1 to 8, and / or the temperature control system of the eVTOL battery according to claim 9, comprises at least one of the following steps: Based on the cooling circuit being arranged on the machine body (10), and the temperature of the battery pack (11) being greater than or equal to the first set temperature T1, the cooling circuit and the battery circuit (101) are connected in series, and the cooling circuit cools the battery pack (11); Based on the cooling circuit being arranged on the ground, the machine body (10) being located on the ground, and the temperature of the battery pack (11) being greater than or equal to the first set temperature T1, the cooling circuit and the battery circuit (101) are connected in series, and the cooling circuit cools the battery pack (11); Based on the heating circuit being arranged on the machine body (10), and the temperature of the battery pack (11) being less than or equal to the second set temperature T2, the heating circuit is connected in series with the battery circuit (101), and the heating circuit keeps the battery pack (11) warm or heats it; Based on the heating circuit being arranged on the ground, the machine body (10) being located on the ground, and the temperature of the battery pack (11) being less than or equal to the second set temperature T2, the heating circuit and the battery circuit (101) are connected in series, and the heating circuit keeps the battery pack (11) warm or heats it.

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