EVTOL battery pack mounting structure and EVTOL aircraft having same

Abstract

The utility model discloses a kind of eVTOL battery package mounting structure and the eVTOL aircraft with it, it is related to eVTOL aircraft technical field. Including motor arm and battery package, the motor arm (100) includes longitudinal skeleton and vertical skeleton connected on longitudinal skeleton, the first connecting piece is equipped with to the bottom of the side of longitudinal skeleton of the battery package, the second connecting piece is equipped with to the middle of the side of vertical skeleton of the battery package, the first connecting piece and the second connecting piece are respectively used to be connected with longitudinal skeleton and vertical skeleton. The utility model has the beneficial effect that by the first connecting piece and the second connecting piece on the side of battery package, longitudinal skeleton and vertical skeleton of motor arm are connected respectively, ensure the connection stability of battery package.

Description

Technical Field

[0001] This utility model relates to the field of eVTOL aircraft technology, and in particular to an eVTOL battery pack mounting structure and an eVTOL aircraft having the same. Background Technology

[0002] With the development of aviation technology and the improvement of human life needs, electric vertical takeoff and landing (eVTOL) aircraft have emerged. They combine the performance of helicopters and fixed-wing aircraft, enabling vertical takeoff and landing, reducing the need for takeoff and landing sites, while also providing a longer range and faster flight speed. They are safe, reliable, simple in structure, clean in energy, and have low noise.

[0003] Electric eVTOL aircraft use battery packs as their power source. Currently, there are designs that place the battery packs in the aircraft's motor arms, making the battery packs close to the motors and facilitating wiring connections.

[0004] However, placing the battery pack within the motor arm presents significant challenges. The battery pack's weight, combined with the fact that the eVTOL aircraft must withstand drastic changes in thrust and pull (from the eight lift propellers and the three thrust propellers) during vertical takeoff and landing and level flight transitions, leads to substantial fluctuations in structural stress. Instable battery pack installation could exacerbate the motor arm's vibration response, potentially triggering resonance and causing structural fatigue damage. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an eVTOL battery pack mounting structure and an eVTOL aircraft having the same, so as to solve the above problems.

[0006] This utility model provides an eVTOL battery pack mounting structure, including a motor arm and a battery pack. The motor arm (100) includes a longitudinal frame and a vertical frame connected to the longitudinal frame. The battery pack has a first connector at the bottom of the side corresponding to the longitudinal frame and a second connector at the middle of the side corresponding to the vertical frame. The first connector and the second connector are respectively used to connect to the longitudinal frame and the vertical frame.

[0007] Optionally, the first connector and the second connector are detachably connected to both the longitudinal frame and the vertical frame.

[0008] Optionally, the longitudinal frame includes two parallel longitudinal beams, and the vertical frame is located between the two longitudinal beams and fixedly connected to the longitudinal beams; the longitudinal beams have slots corresponding to the positions of the first connectors, and a first fitting extends from the longitudinal beams for connecting with the first connectors, the first fitting being located in the slots.

[0009] Optionally, the first connector is a first lug, and the first assembly includes two second lugs that are parallel to the longitudinal beam. The first lug is located between the two second lugs, and coaxial mounting holes are provided on the first lug and the second lugs.

[0010] Optionally, the second connector is a third lug, the third lug having a connecting hole, the vertical frame having an extension extending perpendicularly to the vertical frame, the extension having an anti-torsion pin perpendicular to the extension, the anti-torsion pin passing through the connecting hole of the second connector.

[0011] Optionally, the motor arm further includes a skin that wraps around the longitudinal beam, and the skin has an opening below the longitudinal beam, with the bottom of the battery pack located in the opening.

[0012] Optionally, the size of the opening is larger than the size of the bottom of the battery pack, and a seal is provided between the opening and the bottom of the battery pack.

[0013] Optionally, it also includes a cross frame located between and fixedly connected to the two longitudinal beams, the cross frame being used to support the skin, and the cross frame having a clearance groove for avoiding the battery pack.

[0014] Optionally, it also includes a cover, wherein the skin has a notch at the slot corresponding to the longitudinal beam, the cover is detachably installed on the skin, and the cover closes the notch.

[0015] This utility model also provides an eVTOL aircraft, including the eVTOL battery pack mounting structure described above.

[0016] The beneficial effects of this invention are as follows: The first and second connectors on the side of the battery pack are respectively connected to the longitudinal and vertical frames of the motor arm, ensuring the connection stability of the battery pack. Furthermore, the connection between the battery pack and the longitudinal frame is located at the bottom of the side of the battery pack, and the connection between the battery pack and the vertical frame is located at the middle of the side of the battery pack, avoiding the problem of the battery pack easily swaying due to its center of gravity being located at a high position. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the eVTOL aircraft.

[0019] Figure 2 This is a schematic diagram of the motor arm in an eVTOL battery pack mounting structure according to this utility model.

[0020] Figure 3 This is an exploded view of the motor arm in the eVTOL battery pack mounting structure of this utility model.

[0021] Figure 4 This is an exploded view of the motor arm and battery pack in an eVTOL battery pack mounting structure according to this utility model.

[0022] Figure 5 This is a schematic diagram showing the connection between the first connector and the second connector in the eVTOL battery pack mounting structure of this utility model.

[0023] Figure 6 This is a schematic diagram of the vertical frame and anti-torsion pin in the eVTOL battery pack mounting structure of this utility model.

[0024] In the picture: Motor arm 100, machine body 200; Longitudinal beam 101, slot 1011, first assembly 1012, reinforcing frame 102, extension 1021, anti-torsion pin 1022, skin 103, cover 104, bolt 105, nut 106, cross frame 107, support 108; Battery pack 300, first connector 301, second connector 302. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0026] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0027] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0029] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0030] like Figure 1 As shown, this embodiment provides an eVTOL battery pack mounting structure applied to an eVTOL aircraft. The eVTOL aircraft has a fuselage 200, a motor arm 100, and other parts. A motor and a propeller are mounted on the motor arm 100. The motor drives the propeller to rotate, thus propelling the eVTOL aircraft into flight. Currently, some designs place the battery pack 300 within the motor arm 100, making the battery pack 300 close to the motor for convenient wiring connections. However, the battery pack 300 is too heavy, necessitating sufficient stability during installation within the motor arm 100.

[0031] Therefore, such as Figures 2 to 6 As shown, the eVTOL battery pack mounting structure provided in this embodiment includes a motor arm 100 and a battery pack 300. The motor arm 100 includes a longitudinal frame and a vertical frame connected to the longitudinal frame. The longitudinal frame and the vertical frame constitute the main frame of the motor arm 100. A skin 103 is covered on the main frame composed of the longitudinal frame and the vertical frame to form a closed space, which can be used to install components such as the battery pack 300.

[0032] Specifically, the longitudinal frame includes two parallel longitudinal beams 101, and the vertical frame is located between the two longitudinal beams 101 and fixedly connected to them. The vertical frame includes reinforcing frames 102 located on opposite sides of the longitudinal beams 101, a support member 108 located between the two reinforcing frames 102, and a transverse frame 107. The reinforcing frames 102 and the transverse frame 107 have the same height, and the support member 108 has a height half that of the reinforcing frames 102 and the transverse frame 107. Skins 103 are provided above and below the two longitudinal beams 101, the reinforcing frames 102, and the transverse frame 107. Both the skins 103 and the longitudinal beams 101 are composed of carbon fiber composite materials. The skins 103 maintain the shape of the eVTOL aircraft, withstand aerodynamic loads, and transmit a portion of the motor's pulling force.

[0033] The battery pack 300 has a first connector 301 at the bottom of the side corresponding to the longitudinal frame (i.e., the two longitudinal beams 101), and a second connector 302 at the middle of the side corresponding to the vertical frame. The first connector 301 and the second connector 302 are used to connect with the longitudinal frame and the vertical frame, respectively.

[0034] Specifically, in this embodiment, the battery pack 300 is located between one of the reinforcing frames 102 and the support member 108. The bottom of each side of the battery pack 300 corresponding to the two longitudinal beams 101 is provided with a first connector 301. The battery pack 300 is connected to the two longitudinal beams 101 through the first connectors 301, and the battery pack 300 is connected to the reinforcing frame 102 and the support member 108 respectively through two second connectors 302. There are multiple first connectors 301, which can securely connect the battery pack 300 to the two longitudinal beams 101. In this embodiment, there are six first connectors 301, with three first connectors 301 on each side of the battery pack 300 corresponding to the two longitudinal beams 101.

[0035] In the eVTOL battery pack mounting structure provided in this embodiment, the battery pack 300 is connected to the longitudinal and vertical frames of the motor arm 100 via first connectors 301 and second connectors 302, ensuring the installation stability of the battery pack 300 within the motor arm 100. Furthermore, multiple first connectors 301 are located at the bottom of the side of the battery pack 300, and second connectors 302 are located at the middle of the side of the battery pack 300, securing the battery pack 300 at its bottom and middle, thus preventing the battery pack 300 from easily wobbling due to its high center of gravity.

[0036] For ease of maintenance or battery replacement, in this embodiment, the first connector 301 is detachably connected to the longitudinal beam 101, and the second connector 302, the reinforcing frame 102, and the support member 108 are all detachably connected. When it is necessary to remove the battery, the first connector 301 and the second connector 302 can be separated from the longitudinal beam 101, the support member 108, and the reinforcing frame 102.

[0037] Specifically, for the detachable connection between the first connector 301 of the battery pack 300 and the longitudinal beam 101, the longitudinal beam 101 has a slot 1011 corresponding to the part of the first connector 301. A first fitting 1012 extends from the longitudinal beam 101 for connection with the first connector 301, and the first fitting 1012 is located within the slot 1011. The first connector 301 is a first lug, and the first fitting 1012 includes two second lugs connected parallel to the longitudinal beam 101, with the first lug located between the two second lugs. Coaxial mounting holes are formed on the first and second lugs. When the battery pack 300 needs to be assembled into the motor arm 100, bolts 105 are passed through the mounting holes of the first lug and the two second lugs and locked with nuts 106, thus fixing the first lug of the battery pack 300 and the two second lugs of the longitudinal beam 101 together, thereby fixing the battery pack 300 and the motor arm 100 together. When the battery pack 300 needs to be removed, the first lug of the battery pack 300 and the two second lugs of the longitudinal beam 101 can be separated by removing the bolt 105, and then the battery pack 300 can be removed from the motor arm 100.

[0038] For the detachable connection between the second connector 302 of the battery pack 300 and the reinforcing frame 102 and the support member 108, the second connector 302 is a third lug, which is vertically disposed on the side of the battery pack 300. The third lug has a connection hole. The reinforcing frame 102 and the support member 108 both have extensions 1021 extending perpendicularly to the reinforcing frame 102 and the support member 108. The extensions 1021 are provided with anti-torsion pins 1022 perpendicular to the extensions 1021, and the anti-torsion pins 1022 are located below the extensions 1021. The anti-torsion pins 1022 pass through the connection hole of the second connector 302. The anti-torsion pin 1022 on the reinforcing frame 102 is located in the middle of the reinforcing frame 102, and the anti-torsion pin 1022 on the support member 108 is located at the top of the support member 108. Since the height of the support member 108 is half the height of the reinforcing frame 102, the two anti-torsion pins 1022 are at the same height, corresponding to the middle of the side of the battery pack 300. When the battery pack 300 tends to sway left and right, the anti-torsion pin 1022 can prevent the battery pack 300 from swaying, improve the vibration of the battery pack 300, and further improve the stability of the battery pack 300. The anti-torsion pin 1022 is preferably made of stainless steel to ensure the connection stability of the battery pack 300.

[0039] Furthermore, the motor arm 100 also includes two skins 103 that wrap around the longitudinal beam 101. One skin 103 is connected to the lower part of the longitudinal beam 101 and the reinforcing frame 102, and the other skin 103 is located above the longitudinal beam 101. The two skins 103 wrap around the longitudinal beam 101. An opening (not shown) is provided on the skin 103 located below the longitudinal beam 101, and the bottom of the battery pack 300 is located in the opening. That is to say, the bottom of the battery pack 300 is part of the lower surface of the motor arm 100, and the bottom of the battery pack 300 is directly exposed, which can improve the heat dissipation effect of the battery pack 300. Furthermore, when installing the battery pack 300, the battery pack 300 is installed into the motor arm 100 from below. After passing through the opening of the skin 103, the battery pack 300 moves into the motor arm 100. During the process of the battery pack 300 gradually moving into the motor arm 100, the connecting hole of the second connector 302 of the battery pack 300 is aligned with the anti-torsion pin 1022 on the reinforcing frame 102 and the support member 108. After the battery pack 300 is moved into place, the anti-torsion pin 1022 is located in the connecting hole of the second connector 302 (third lug) of the battery pack 300. That is, during the installation of the battery pack 300, the anti-torsion pin 1022 can also play a positioning role. After the battery pack 300 is assembled with the reinforcing frame 102 and the anti-torsion pin 1022 on the support member 108, the battery pack 300 is fixed in the motor arm 100 by passing bolts 105 through the assembly holes of the first connecting member 301 (first ear) of the battery pack 300 and the second ear on the longitudinal beam 101.

[0040] In this method, the installation and removal of the battery pack 300 only requires the installation or removal of the bolts 105 in the first and second lugs. The assembly of the third lug and the anti-torsion pin 1022 of the battery pack 300 does not require operation, thus improving the installation and removal efficiency of the battery pack 300.

[0041] Furthermore, there are multiple horizontal frames 107, located between one of the reinforcing frames 102 and the support member 108. These horizontal frames 107 are distributed sequentially at intervals along the length of the longitudinal beam 101. Each horizontal frame 107 is located between two longitudinal beams 101 and is fixedly connected to them. The horizontal frames 107, together with the reinforcing frame 102, serve to support the skin 103. Moreover, the horizontal frames 107 are approximately concave in shape, allowing their tops to support the skin 103, while their bottoms have clearance grooves to avoid the battery pack 300.

[0042] Meanwhile, during the installation and removal of the battery pack 300, to prevent the battery pack 300 from bumping into the skin 103, the opening of the skin 103 located below the longitudinal beam 101 is larger than the bottom of the battery pack 300, leaving a safety margin. In this example, the safety margin is 10mm. Furthermore, to avoid the gap between the opening of the skin 103 and the battery pack 300 generating significant drag during flight, and to prevent water, dust, etc., from entering the motor arm 100 and damaging the eVTOL aircraft, a seal is provided between the opening of the skin 103 and the bottom of the battery pack 300 in this embodiment. The seal can be a rubber seal. The seal is first fixed to the opening of the skin 103. When the battery pack 300 is installed, the side of the battery pack 300 abuts against the seal, sealing the gap between the opening of the skin 103 and the battery pack 300.

[0043] Furthermore, to facilitate the assembly of the first connector 301 (first lug) of the battery pack 300 and the first mounting part 1012 (second lug) in the slot 1011 of the longitudinal beam 101, a notch is also made on the skin 103 corresponding to the slot 1011 of the longitudinal beam 101. However, there is a risk of water and dust entering through the notch of the skin 103. To seal the notch on the skin 103, the eVTOL battery pack mounting structure provided in this embodiment also includes a cover 104. The cover 104 is detachably mounted on the skin 103. Specifically, it can be configured such that coaxial holes are pre-set on the skin 103 and the cover 104. The cover 104 is detachably mounted on the skin 103 by bolts and closes the slot 1011 of the longitudinal beam 101. When it is necessary to install or remove the battery pack 300, first remove the cover 104. At this time, the bolts 105 in the first and second lugs can be installed or removed. After the battery pack 300 is installed, install the cover 104 on the skin 103 to close the gap in the skin 103.

[0044] In summary, the eVTOL battery pack mounting structure provided in this embodiment can securely mount the battery pack 300 in the motor arm 100, and the battery pack 300 can be installed and removed quickly and easily, while ensuring airtightness.

[0045] This embodiment also provides an eVTOL aircraft, including the eVTOL battery pack mounting structure described above.

[0046] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An eVTOL battery pack mounting structure, characterized in that: The device includes a motor arm (100) and a battery pack (300). The motor arm (100) includes a longitudinal frame and a vertical frame connected to the longitudinal frame. The battery pack (300) has a first connector (301) at the bottom of the side of the longitudinal frame and a second connector (302) at the middle of the side of the vertical frame. The first connector (301) and the second connector (302) are respectively used to connect to the longitudinal frame and the vertical frame.

2. The eVTOL battery pack mounting structure according to claim 1, characterized in that: The first connector (301) and the second connector (302) are detachably connected to both the longitudinal frame and the vertical frame.

3. The eVTOL battery pack mounting structure according to claim 1, characterized in that: The longitudinal frame includes two parallel longitudinal beams (101), and the vertical frame is located between the two longitudinal beams (101) and fixedly connected to the longitudinal beams (101); the longitudinal beams (101) have slots (1011) at the part corresponding to the first connector (301), and the longitudinal beams (101) have a first fitting (1012) extending on them for connecting with the first connector (301), and the first fitting (1012) is located in the slots (1011).

4. The eVTOL battery pack mounting structure according to claim 3, characterized in that: The first connector (301) is a first lug, and the first assembly (1012) includes two second lugs that are parallel to the longitudinal beam (101). The first lug is located between the two second lugs, and coaxial mounting holes are provided on the first lug and the second lug.

5. The eVTOL battery pack mounting structure according to claim 4, characterized in that: The second connector (302) is a third ear piece, which has a connecting hole. The vertical frame has an extension (1021) extending perpendicularly to the vertical frame. The extension (1021) has an anti-torsion pin (1022) perpendicular to the extension (1021). The anti-torsion pin (1022) passes through the connecting hole of the second connector (302).

6. The eVTOL battery pack mounting structure according to claim 5, characterized in that: The motor arm (100) also includes a skin (103) that wraps around the longitudinal beam (101). The skin (103) has an opening below the longitudinal beam (101), and the bottom of the battery pack (300) is located in the opening.

7. The eVTOL battery pack mounting structure according to claim 6, characterized in that: The opening is larger than the bottom of the battery pack (300), and a seal is provided between the opening and the bottom of the battery pack (300).

8. The eVTOL battery pack mounting structure according to claim 7, characterized in that: It also includes a cross frame (107) located between and fixedly connected to the two longitudinal beams (101), the cross frame (107) being used to support the skin (103), and the cross frame (107) having a clearance groove for avoiding the battery pack (300).

9. The eVTOL battery pack mounting structure according to claim 6, characterized in that: It also includes a cover (104), the skin (103) having a notch at the slot (1011) of the longitudinal beam (101), the cover (104) being detachably mounted on the skin (103) and the cover (104) closing the notch.

10. An eVTOL aircraft, characterized in that: Includes the eVTOL battery pack mounting structure as described in any one of claims 1-9.

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