EVTOL battery pack connecting structure

Abstract

The utility model discloses an eVTOL battery pack connecting structure which comprises a machine body structure, a mounting groove is formed in the bottom of the machine body structure, a battery pack is mounted in the mounting groove, the battery pack is connected with the machine body structure through a connecting piece, a gap is formed between the battery pack and the machine body structure, and a sealing strip is mounted at the gap. The structure is direct in energy supply: the battery pack is close to the motor, so that nearby energy supply can be conveniently carried out on the motor, and the weight and the length of the high-voltage wire harness are saved; the sealing performance is good, a safety gap for installation needs to be reserved on the periphery of the battery pack, a sealing strip is designed to seal the gap, the sealing strip is made of a soft material and has a certain interference amount with the battery pack, and when the battery pack is installed, the battery pack can be prevented from knocking and damaging the structure, and meanwhile water, dust and the like are prevented from entering the structure from the gap.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation equipment, and in particular to an eVTOL battery pack connection structure. Background Art

[0002] The development of eVTOL (Electric Vertical Takeoff and Landing) electric vertical takeoff and landing aircraft has attracted widespread attention from aerospace companies, the automotive industry, the transportation industry, the government, the military, and academia. Aircraft that rely on electric motors rather than internal combustion engines use electric propulsion systems instead of internal combustion engine power, thereby gaining many advantages and unique qualities. The most prominent advantages are energy saving and environmental protection, high efficiency and low energy consumption, while achieving near-zero emissions, very low noise and vibration levels, and good ride comfort. It is a veritable environmentally friendly aircraft. In addition, it is safe and reliable (no explosion and fuel leakage), simple structure, easy operation and use, good maintainability / low cost, and good economy. There are also many advantages in design: the overall layout is flexible, the optimal layout and unconventional / innovative layout can be adopted; aircraft with extraordinary performance can be designed to meet special purpose needs, etc.

[0003] The battery pack provides energy for the eVTOL aircraft and is heavy, so it needs to be securely connected to the electric aircraft. At the same time, the battery pack needs to be maintained frequently and also needs to be easily maintained after being connected. How to conveniently disassemble and connect is the top priority, and when the battery pack is connected to the structure, the reliability of its connection needs to be considered. The existing battery pack is basically connected to the skeleton of the body structure and connected with fasteners. The battery pack is heavy and has a harsh vibration environment. It is easy to loosen after long-term use and needs to be checked regularly, otherwise the status cannot be judged. Utility Model Content

[0004] The purpose of the present invention is to provide an eVTOL battery pack connection structure to solve the problems mentioned in the background technology. To achieve the above purpose, the present invention provides the following technical solutions: an eVTOL battery pack connection structure, including a body structure, a mounting groove is provided at the bottom of the body structure, a battery pack is installed inside the mounting groove, the battery pack is connected to the body structure through a connector, a gap is formed between the battery pack and the body structure, and a sealing strip is installed at the gap.

[0005] Preferably, the body structure includes a skin, a beam is installed inside the skin, the battery pack is installed on the beam, and the sealing strip is bonded to the skin by structural adhesive.

[0006] Preferably, two beams are provided, and the two beams are distributed in parallel and connect two sides of the battery pack.

[0007] Preferably, the connection between the beam and the battery pack is provided with a local reinforced end, and a fixing nut is installed on the local reinforced end.

[0008] Preferably, battery pack connection points are provided on both sides of the battery pack, and the battery pack connection points are connected to the beams through connectors and fixing nuts, and the bottom of the battery pack is in the shape of an eVTOL aircraft.

[0009] Preferably, the connecting member is a bolt.

[0010] The technical effects and advantages of the utility model are as follows: the structure provides direct energy: the battery pack is close to the motor, so the motor can be easily powered nearby, saving the weight and length of the high-voltage wiring harness;

[0011] Good sealing performance: A safe gap needs to be left around the battery pack for installation. A sealing strip is designed to seal the gap. The sealing strip is made of soft material and has a certain amount of interference with the battery pack. When the battery pack is installed, it can prevent the battery pack from scratching the structure and prevent water, dust, etc. from entering the structure through the gap.

[0012] High safety: When the fasteners connecting the battery pack are loose, the battery pack will drop due to gravity, causing the battery pack to protrude from the outside of the skin, forming a step difference. Maintenance personnel can easily determine whether the battery pack connection is loose and tighten it in time, which is highly safe.

[0013] Good maintainability: There are fewer connection points between the battery pack and the structure, and the bottom surface is used as the outer surface of the structure, so there is no need to remove the cover, saving a lot of maintenance time;

[0014] Light weight: The battery pack base serves as the shape of the eVTOL aircraft, saving the weight of the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric drawing of the utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 It is an exploded view of the body structure of the utility model;

[0018] Figure 4 This is a partial view of the utility model at the connection with the battery pack;

[0019] Figure 5 It is a partial view of the connection point of the battery pack of the utility model;

[0020] Figure 6 It is a cross-sectional view of the connection point of the battery pack of the utility model;

[0021] Figure 7This is an axonometric view of the utility model on an eVTOL aircraft.

[0022] In the figure, 1. battery pack connection structure; 11. fuselage structure; 111. skin; 112. beam; 1121. fixing nut; 1122. local reinforcement end; 12. battery pack; 121. battery pack connection point; 13. sealing strip; 14. bolt; 2. eVTOL aircraft. DETAILED DESCRIPTION

[0023] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below in conjunction with specific diagrams. In the description of the utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection or a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two components.

[0024] Example

[0025] like Figure 7 As shown, the battery pack 12 is connected to the inner motor arm of the eVTOL aircraft 2, which is close to the inner motor, so it is convenient to directly power the motor. The motor arm structure wraps the battery pack 12, provides protection and support for the battery pack 12, and ensures that the battery pack 12 is securely connected. The bottom surface of the battery pack 12 is manufactured according to the shape, which serves as the shape of the lower part of the motor arm, saving the structural cover, and also saving the time of installing and removing the cover during maintenance.

[0026] like Figure 1 and Figure 2As shown, the battery pack connection structure 1 includes a body structure 11, a battery pack 12, a sealing strip 13, and a bolt 14. A mounting groove is provided at the bottom of the body structure 11, and the battery pack 12 is installed inside the mounting groove. The battery pack 12 is connected to the body structure 11 through the bolt 14, and a gap is formed between the battery pack 12 and the body structure 11, and a sealing strip 13 is installed at the gap; the body structure 11 is the main force-bearing component of the structure, bearing the vibration of the battery pack 12 and the tension generated by the motor; the battery pack 12 is connected to the body structure 11 to provide power for the entire eVTOL aircraft 2. When installing the battery pack 12, in order to prevent the battery pack 12 from hitting the body structure 11 and damaging the body structure 11, the opening at the bottom of the mounting groove of the body structure 11 should be larger than the size of the battery pack 12, leaving a safety margin, which is 10 mm in this example. Since there is a large gap between the battery pack 12 and the fuselage structure 11, it will generate large resistance during flight, and water, dust, etc. will enter the fuselage structure, causing harm to the eVTOL aircraft 2, so the gap is sealed with a sealing strip 13. The battery pack 12 is connected to the fuselage structure 11 by bolts 14. The bolts 14 and the fuselage structure 11 are threaded, so that when the battery pack 12 is maintained, the bolts 14 can be turned to complete the disassembly and installation. Bolts 14 should be bolts with higher strength grades to meet the force requirements, and the strength grade should not be lower than grade 10.9.

[0027] like Figure 3 As shown, the fuselage structure 11 includes a skin 111 and a beam 112. Two beams 112 are provided and are distributed in parallel and installed inside the skin 111. The skin 111 is made of carbon fiber composite materials to maintain the shape of the eVTOL aircraft, withstand aerodynamic loads, and transmit part of the tension of the motor. The beam 112 is a skeleton structure, connected to the battery pack 12, and serves as a support for the battery pack 12. The beam 12 is made of aluminum alloy, preferably 2024 aluminum alloy, and the heat treatment state is T351.

[0028] like Figure 4 As shown, the connection between the beam 112 and the battery pack 12 is provided with a local reinforced end 1122, and a fixing nut 1121 is designed to be connected to the local reinforced end 1122 of the beam 112. The fixing nut 1121 can be designed together with the beam 112, or it can be designed separately for installation. This example is a separate design. The fixing nut 1121 is made of high-strength stainless steel and has a thread inside. Cooperating with the bolt 14, the fixing nut 1121 is fixed to the beam 112. In this way, when connected with the bolt 14, no tools are required for internal fixing, and only single-sided operation on the outside of the body is required.

[0029] like Figure 5As shown, the battery pack 12 is connected to the body structure 11 through the battery pack connection points 121. The battery pack connection points 121 are installed on both sides of the battery pack 12 and are ear pieces extending from the outside of the battery pack 12. A small connecting plane is designed inside the ear piece so that the bolt 14 can be matched in a plane. At the same time, the size between the recessed hole outside the ear piece and the head of the bolt 14 is sufficient for inserting tools, which is convenient for installation. At the same time, the bolt head will not exceed the outer surface, which has good aerodynamic characteristics.

[0030] like Figure 6 As shown, the hole diameter of the battery pack connection point 121 is larger than the diameter of the bolt 14, so that after installation, the position tolerance of multiple battery pack connection points 121 can be adjusted so that the battery pack 12 can be installed smoothly. In this example, it is 0.5mm. The sealing strip 13 is bonded to the skin 111 by structural adhesive. There is a certain interference between the size of the sealing strip 13 and the battery pack 12. In this example, it is 2mm, which can effectively seal the gap between the battery pack 12 and the body structure 11. The shape of the bottom of the battery pack 12 is the shape of the eVTOL aircraft 2, maintaining the continuity of the shape and saving the cover.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An eVTOL battery pack connection structure, comprising a body structure, characterized in that: A mounting groove is provided at the bottom of the body structure, a battery pack is installed inside the mounting groove, the battery pack is connected to the body structure through a connecting piece, a gap is formed between the battery pack and the body structure, and a sealing strip is installed at the gap.

2. The eVTOL battery pack connection structure according to claim 1, characterized in that: The body structure includes a skin, a beam is installed inside the skin, the battery pack is installed on the beam, and the sealing strip is bonded to the skin by structural adhesive.

3. The eVTOL battery pack connection structure according to claim 2, characterized in that: There are two beams, which are distributed in parallel and connect two sides of the battery pack.

4. The eVTOL battery pack connection structure according to claim 2, characterized in that: The connection between the beam and the battery pack is provided with a local reinforced end, and a fixing nut is installed on the local reinforced end.

5. The eVTOL battery pack connection structure according to claim 4, characterized in that: Battery pack connection points are provided on both sides of the battery pack, and the battery pack connection points are connected to the beams through connectors and fixed nuts, and the bottom of the battery pack is in the shape of an eVTOL aircraft.

6. The eVTOL battery pack connection structure according to claim 5, characterized in that: The connecting piece is a bolt.

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