Distribution plate for multi-rotor unmanned aerial vehicle and installation tool of distribution plate

Abstract

The utility model relates to a multi-rotor unmanned aerial vehicle distribution plate and an installation tool thereof, and belongs to the technical field of unmanned aerial vehicle power distribution. In order to solve the problems of low heat dissipation efficiency and poor assembly precision of a distribution plate, the following scheme is provided: the distribution plate is composed of an aluminum-based heat dissipation plate, a high-frequency ceramic substrate and a copper foil power supply layer, needle-shaped heat dissipation fins are arranged at the bottom of the aluminum-based heat dissipation plate, and the heat dissipation efficiency is improved by expanding the heat dissipation area; the high-frequency ceramic substrate and the aluminum-based heat dissipation plate are bonded through conductive adhesive, positioning grooves are formed in the four corners of the high-frequency ceramic substrate and are embedded with positioning blocks of the aluminum-based heat dissipation plate in a diagonal mode, and accurate positioning is achieved. The mounting tool comprises a sliding seat, a storage barrel and a discharging assembly, the sliding seat moves to a glue injection station through a sliding rail to be quantitatively coated with glue, and the plate pushing mechanism pushes the high-frequency ceramic substrate to the position above the aluminum-based heat dissipation plate to vertically fall down; the pressing plate is matched with the spring to apply vertical pressure to fit the two. According to the scheme, the heat dissipation performance and the assembly efficiency are improved, and the method is suitable for batch production of high-power unmanned aerial vehicle distribution boards.

Description

Technical Field

[0001] This utility model relates to the field of power distribution board technology for unmanned aerial vehicles (UAVs), and in particular to a power distribution board for multi-rotor UAVs and its mounting fixture. Background Technology

[0002] In the power distribution system of a multi-rotor drone, the power distribution board is one of the core components, and its performance directly affects the stability and reliability of the drone.

[0003] Traditional power distribution boards typically employ a single-layer substrate structure, resulting in poor heat dissipation performance and difficulty meeting the heat dissipation requirements under high power density. With the increasing payload capacity of drones, the power density of power modules has significantly increased, causing the power distribution board to generate a large amount of heat during operation. If this heat cannot be dissipated in time, it will cause the temperature of the copper foil power layer to rise, leading to increased resistance, accelerated power loss, and potentially even circuit damage due to thermal runaway.

[0004] In existing technologies, some power distributors improve heat dissipation performance by adding a metal heat dissipation layer. However, the difference in thermal expansion coefficients between the metal and the ceramic substrate can easily lead to interface delamination, affecting long-term reliability. In addition, the traditional power distributor assembly process relies on manual assembly, making it difficult to guarantee the positioning accuracy of the high-frequency ceramic substrate and the aluminum-based heat sink, and the operation efficiency is low.

[0005] To address the aforementioned issues, this utility model document proposes a power distribution board for multi-rotor unmanned aerial vehicles and its mounting fixture. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies, such as poor heat dissipation efficiency of traditional power distribution boards, low assembly efficiency, and insufficient installation accuracy. This invention proposes a power distribution board and its installation fixture for multi-rotor drones.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A power distribution board for a multi-rotor unmanned aerial vehicle includes:

[0009] An aluminum-based heat sink and a high-frequency ceramic substrate are provided. The high-frequency ceramic substrate is attached to the top of the aluminum-based heat sink, and multiple copper foil power layers are fixedly installed on the top of the high-frequency ceramic substrate. Conductive adhesive is provided between the aluminum-based heat sink and the high-frequency ceramic substrate, which allows the two to adhere tightly and achieve initial fixation.

[0010] Multiple pin-shaped heat dissipation fins are fixedly installed at the bottom of the aluminum-based heat sink. By expanding the heat dissipation surface area, the heat dissipation efficiency of the aluminum-based heat sink is improved, and the copper foil power layer is prevented from failing due to overheating.

[0011] In one possible design, positioning grooves are provided at the four corners of the high-frequency ceramic substrate, and positioning blocks are provided in each of the four positioning grooves. Two of the positioning blocks diagonally opposite each other are fixedly connected to the inner wall of the corresponding positioning groove, and the other two positioning blocks are fixedly connected to the top of the aluminum-based heat sink. The precise installation and positioning of the copper foil power layer is achieved through the cooperation of the positioning blocks and the positioning grooves.

[0012] An installation fixture for assembling and installing a power distribution board for a multi-rotor UAV as described in any one of the above claims, comprising:

[0013] A tooling base, wherein a sliding seat is slidably mounted on the top of the tooling base via a slide rail, and the sliding seat is used to place and position the aluminum-based heat sink.

[0014] A storage cylinder is fixedly installed on the top of the tooling base by a bracket. A gap is left between the storage cylinder and the top of the tooling base for the sliding seat to pass through. The storage cylinder is used to store multiple high-frequency ceramic substrates to be assembled.

[0015] The discharge assembly is used to individually discharge the high-frequency ceramic substrate from the storage cylinder.

[0016] A liquid storage tank is used to store conductive adhesive added between an aluminum-based heat sink and a high-frequency ceramic substrate.

[0017] In one possible design, the discharge assembly includes an extension box fixedly installed on one side of the storage cylinder. The bottom of the extension box has an opening, and the interior of the extension box forms a discharge chamber. The opening matches the high-frequency ceramic substrate, allowing the high-frequency ceramic substrate that moves into the discharge chamber to be discharged from the opening under gravity. A discharge port is provided on one side of the discharge chamber, and the size of the discharge port matches the width and thickness of the high-frequency ceramic substrate. A push plate slides through the side of the storage cylinder away from the extension box. One side of the push plate cooperates with an adjacent high-frequency ceramic substrate to push out the corresponding high-frequency ceramic substrate. A fixing block is fixedly installed on the top of the push plate, and a lever is fixedly installed on the top of the fixing block. The fixing block is located on the side of the push plate away from the storage cylinder.

[0018] In one possible design, a fixing frame is fixedly installed on one side of the storage tube, and a guide rod is fixedly installed on the inner wall of one side of the fixing frame. The other end of the guide rod is fixedly connected to one side of the storage tube. A fixing block is slidably sleeved on the outer wall of the guide rod. A first spring is sleeved on the outer wall of the guide rod. One end of the first spring is fixedly connected to one side of the storage tube through a spring seat, and the other end of the first spring is fixedly connected to one side of the fixing block through a spring seat. The push plate is automatically pulled out and reset by the elastic force of the first spring. A sliding groove is opened on the top of the fixing frame, and the top end of the lever passes through the sliding groove, so that the push plate can be easily pushed by the lever.

[0019] In one possible design, a sliding rod slides through the top of the extension box, and a pressing plate is fixedly installed at the bottom end of the sliding rod. The pressing plate is located inside the discharge chamber. A second spring is sleeved on the outer wall of the sliding rod. The bottom end of the second spring is fixedly connected to the top of the extension box through a spring seat, and the top end of the second spring is fixedly connected to the outer wall of the sliding rod through a spring seat. When the pressing plate descends, it applies pressure to the aluminum-based heat sink and the high-frequency ceramic substrate below, ensuring that the two are stably bonded together by conductive adhesive.

[0020] In one possible design, a support frame is fixedly installed at the bottom of the liquid storage tank. The support frame is fixedly connected to the top of the tooling base via a bracket. A pump head is fixedly connected to one side of the liquid storage tank. The pump head pumps the conductive adhesive in the liquid storage tank into the aluminum-based heat sink in a metered manner.

[0021] In one possible design, the bottom of the tooling base is provided with a liquid collection hole, which corresponds to the pump head. An internal thread interface is fixedly installed on the bottom of the tooling base, which corresponds to the liquid collection hole. A liquid collection tank is threaded onto the internal thread interface to collect conductive adhesive accidentally discharged from the pump head.

[0022] In one possible design, when the sliding seat moves to both ends, its center corresponds to the opening at the bottom of the discharge chamber and the pump head, respectively; L-shaped plates are fixedly installed on the top of the sliding seat near both sides, and the two L-shaped plates are used to guide the sliding installation of the aluminum-based heat sink. A limiting plate is fixedly installed on the top of the sliding seat, and the sliding position of the aluminum-based heat sink is limited by the limiting plate, so that one side of the aluminum-based heat sink is accurately located at the center of the sliding seat after abutting the limiting plate.

[0023] In this application, the installation fixture allows the operator to place multiple pre-treated high-frequency ceramic substrates into the storage cylinder. During installation, the aluminum-based heat sink can be slidably placed on top of the sliding seat. The aluminum-based heat sink is limited by L-shaped plates on both sides, and then one side abuts against the limiting plate, allowing the aluminum-based heat sink to be centered. The user can then push the sliding seat to move along the slide rail to below the pump head of the liquid storage tank. Pressing the pump head injects an appropriate amount of thermally conductive adhesive into the top of the aluminum-based heat sink. The pump head structure is similar to existing hand sanitizer pump heads; a single press dispenses the appropriate amount of thermally conductive adhesive. After adding the adhesive, the sliding seat is pushed back to its original position, aligning the top of the aluminum-based heat sink with the bottom opening of the extension box.

[0024] The operator can then manually operate the lever to move the pusher plate into the storage cylinder, pushing the bottom high-frequency ceramic substrate into the discharge chamber of the extension box. The high-frequency ceramic substrate falls through the opening at the bottom of the discharge chamber, precisely covering the top of the aluminum-based heat sink. Simultaneously, stopping the pusher plate allows it to automatically reset under the action of the first spring, at which point the next high-frequency ceramic substrate in the storage cylinder will fall at the pre-discharge position.

[0025] Next, the operator can press down the sliding rod, causing the pressing plate to apply vertical pressure to the high-frequency ceramic substrate. This pressure causes the aluminum-based heat sink and the high-frequency ceramic substrate to adhere tightly through the thermally conductive adhesive. Simultaneously, the corresponding positioning blocks embed into the positioning grooves, achieving initial installation and positioning of the aluminum-based heat sink and the high-frequency ceramic substrate. After assembly, the assembly can be removed for further processing. A new aluminum-based heat sink can then be removed, and the above operation repeated to begin a new round of assembly.

[0026] Beneficial effects: In this utility model, the power distribution board for multi-rotor drones has densely distributed needle-shaped heat dissipation fins at the bottom of the aluminum-based heat dissipation plate, which significantly expands the heat dissipation surface area. Combined with the thermally conductive adhesive filling layer, it effectively improves the heat conduction efficiency under high heat load and avoids overheating failure of electronic components.

[0027] In this utility model, the power distribution board for multi-rotor drones uses a high-frequency ceramic substrate and an aluminum-based heat sink to achieve mechanical interlocking through diagonal positioning blocks and grooves. It can be tightened by corresponding fixing screws, which can ensure that the copper foil power layer is installed in a precise and consistent manner and that the structure is stable, reducing manual calibration errors and improving the consistency of batch products.

[0028] In this utility model, the installation fixture has a sliding seat that, together with an L-shaped baffle and a limiting plate, enables rapid center positioning of the aluminum-based heat sink, avoiding manual placement deviations; the slide rail structure allows the substrate to move precisely between the glue injection station and the assembly station, simplifying the operation process.

[0029] In this utility model, the installation fixture, storage cylinder and push plate mechanism realize the automatic discharge of high frequency ceramic substrate: the push plate pushes forward once to release a single substrate, and the substrate falls vertically to the surface of the aluminum base layer through the opening of the discharge chamber, which can avoid surface contamination or damage caused by manual handling.

[0030] In this utility model, the installation fixture has a pressing plate that provides controllable downward pressure through a spring mechanism, which can ensure that the thermally conductive adhesive between the two substrates is evenly distributed and forms a tight interface; the guide rod sliding structure ensures that the pressure direction is perpendicular, avoiding damage to the electrical distribution board assembly.

[0031] In this utility model, the installation fixture uses an existing press-to-discharge structure for the pump head. Repeated pressing ensures a quantitative output of thermally conductive adhesive to the aluminum-based heat sink, effectively controlling the adhesive layer thickness. Excess adhesive that is accidentally leaked can be recovered through the collection hole by a threaded collection tank, avoiding material waste. It is particularly suitable for micro-adhesive coating processes on small-sized circuit boards.

[0032] In this invention, the needle-shaped fins at the bottom of the aluminum-based heat sink in the power distribution board can expand the heat dissipation area, and the thermal conductive adhesive can significantly improve the heat conduction efficiency. The diagonal positioning blocks and grooves realize mechanical interlocking between the substrates, ensuring good assembly accuracy of the power distribution board. The installation fixture positions the aluminum substrate through the sliding seat, and the push plate mechanism realizes the rapid release of the ceramic substrate. In addition, the pressing pump head and the liquid collection tank can control the discharge of the conductive adhesive, and the vertical pressure of the pressing plate can make the thermal conductive adhesive spread evenly, thus improving the assembly accuracy and efficiency of the power distribution board. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of a power distribution board for a multi-rotor unmanned aerial vehicle proposed in this utility model.

[0034] Figure 2 This is a schematic diagram of the split structure of a power distribution board for a multi-rotor UAV proposed in this utility model;

[0035] Figure 3 This is a schematic diagram of the bottom structure of an aluminum-based heat sink for a power distribution board of a multi-rotor UAV, as proposed in this utility model.

[0036] Figure 4 This is a three-dimensional structural diagram of a power distribution board and its mounting fixture for a multi-rotor unmanned aerial vehicle (UAV) proposed in this utility model.

[0037] Figure 5 This is a cross-sectional view of a power distribution board and its mounting fixture for a multi-rotor unmanned aerial vehicle (UAV) proposed in this utility model.

[0038] Figure 6 This is a schematic diagram of the sliding seat structure of a power distribution board and its mounting fixture for a multi-rotor UAV proposed in this utility model.

[0039] Figure 7 This is a schematic diagram of the discharge assembly structure of a power distribution board and its mounting fixture for a multi-rotor UAV proposed in this utility model.

[0040] In the diagram: 1. Aluminum-based heat sink; 2. High-frequency ceramic substrate; 3. Copper foil power layer; 4. Positioning block; 5. Positioning groove; 6. Needle-shaped heat sink fins; 7. Tooling base; 8. Sliding seat; 9. Storage cylinder; 10. Support frame; 11. Liquid storage tank; 12. Pump head; 13. Liquid collection hole; 14. Liquid collection tank; 15. L-shaped plate; 16. Limiting plate; 17. Extension box; 18. Discharge chamber; 19. Push plate; 20. Fixing block; 21. Lever; 22. Fixing frame; 23. Guide rod; 24. First spring; 25. Pressing plate; 26. Sliding rod; 27. Second spring. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0042] In one embodiment: Refer to Figure 1-7 A power distribution board, comprising:

[0043] An aluminum-based heat sink 1 and a high-frequency ceramic substrate 2 are arranged on top of the aluminum-based heat sink 1. Multiple copper foil power layers 3 are fixedly installed on the top of the high-frequency ceramic substrate 2. Conductive adhesive is provided between the aluminum-based heat sink 1 and the high-frequency ceramic substrate 2. The conductive adhesive allows the aluminum-based heat sink 1 and the high-frequency ceramic substrate 2 to be fully and tightly bonded, and at the same time facilitates the initial fixation of the two.

[0044] In this embodiment, the power distribution board also includes multiple pin-shaped heat dissipation fins 6, which are fixedly installed on the bottom of the aluminum-based heat sink 1, thereby improving the heat dissipation efficiency of the aluminum-based heat sink 1.

[0045] In this embodiment, positioning grooves 5 are provided at the four corners of the high-frequency ceramic substrate 2, and positioning blocks 4 are provided in each of the four positioning grooves 5. The two diagonally opposite positioning blocks 4 are fixedly connected to the inner wall of the corresponding positioning groove 5, and the other two positioning blocks 4 are fixedly connected to the top of the aluminum-based heat sink 1. This arrangement enables the installation and positioning of the copper foil power layer 3.

[0046] In this embodiment, mounting holes are provided at the four corners of the aluminum-based heat sink 1, and corresponding positioning holes are also provided inside the four positioning blocks 4 and the corresponding parts of the aluminum-based heat sink 1 below them. By passing through the corresponding positioning blocks 4 and threadedly connecting them with the corresponding positioning holes, the aluminum-based heat sink 1 and the high-frequency ceramic substrate 2 can be further fixed.

[0047] This embodiment also provides an installation fixture for assembling and installing the power distribution board of the aforementioned multi-rotor UAV. The fixture includes a fixture base 7, with a sliding seat 8 slidably mounted on the top of the fixture base 7. The sliding seat 8 is used to place and position the corresponding aluminum-based heat sink 1. The installation fixture also includes a storage cylinder 9, which is fixedly mounted on the top of the fixture base 7 by a bracket. A gap is left between the storage cylinder 9 and the top of the fixture base 7 for the sliding seat 8 to pass through. The storage cylinder 9 is used to hold multiple high-frequency ceramic substrates 2 to be assembled. The installation fixture also includes a discharge assembly for discharging the multiple high-frequency ceramic substrates 2 individually from the storage cylinder 9. The installation fixture also includes a liquid storage tank 11 for storing conductive adhesive added between the aluminum-based heat sink 1 and the high-frequency ceramic substrate 2.

[0048] In this embodiment, the discharge assembly includes an extension box 17 fixedly installed on one side of the storage cylinder 9. The bottom of the extension box 17 has an opening, and a discharge cavity 18 is formed inside the extension box 17. The opening matches the high-frequency ceramic substrate 2, allowing the high-frequency ceramic substrate 2, which moves into the discharge cavity 18, to be discharged from the opening under gravity. A discharge port is opened on one side of the discharge cavity 18, and the size of the discharge port matches the width and thickness of the high-frequency ceramic substrate 2. A push plate 19 slides through the side of the storage cylinder 9 away from the extension box 17. One side of the push plate 19 cooperates with an adjacent high-frequency ceramic substrate 2 to push out the corresponding high-frequency ceramic substrate 2. A fixing block 20 is fixedly installed on the top of the push plate 19, and a lever 21 is fixedly installed on the top of the fixing block 20. The fixing block 20 is located on the side of the push plate 19 away from the storage cylinder 9.

[0049] In this embodiment, a fixing frame 22 is fixedly installed on one side of the storage cylinder 9, and a guide rod 23 is fixedly installed on the inner wall of one side of the fixing frame 22. The other end of the guide rod 23 is fixedly connected to one side of the storage cylinder 9. A fixing block 20 is slidably sleeved on the outer wall of the guide rod 23. A first spring 24 is sleeved on the outer wall of the guide rod 23. One end of the first spring 24 is fixedly connected to one side of the storage cylinder 9 through a spring seat, and the other end of the first spring 24 is fixedly connected to one side of the fixing block 20 through a spring seat, thereby realizing the automatic extraction and reset of the push plate 19. A sliding groove is opened at the top of the fixing frame 22, and the top end of the lever 21 passes through the sliding groove, making it convenient for the user to push the push plate 19.

[0050] In this embodiment, a support frame 10 is fixedly installed at the bottom of the liquid storage tank 11. The support frame 10 is fixedly connected to the top of the tooling base 7 through a bracket. A pump head 12 is fixedly connected to one side of the liquid storage tank 11. The pump head 12 has the same structure as the press pump head in the prior art. It is used to pump out the thermally conductive adhesive in the liquid storage tank 11.

[0051] In this embodiment, the sliding seat 8 is slidably connected to the top of the tooling base 7 via a slide rail fixedly installed on the top of the tooling base 7. When the sliding seat 8 moves to both ends, its center part corresponds to the opening at the bottom of the discharge chamber 18 and the pump head 12, respectively. L-shaped plates 15 are fixedly installed on the top of the sliding seat 8 near both sides. The two L-shaped plates 15 are used to complete the sliding installation of the aluminum-based heat sink 1. A limiting plate 16 is fixedly installed on the top of the sliding seat 8. The limiting plate 16 is used to limit the sliding installation position of the aluminum-based heat sink 1, ensuring that one side of the aluminum-based heat sink 1 can accurately stop at the center position of the sliding seat 8 after abutting the limiting plate 16.

[0052] This application can be used in the field of drone power distribution board technology, or in other fields applicable to this application.

[0053] In another embodiment: Reference Figure 5 , 7 A power distribution board for multi-rotor drones and its mounting fixture, which is applied to the field of drone power distribution board technology.

[0054] In this embodiment, a sliding rod 26 slides through the top of the extension box 17, and a pressing plate 25 is fixedly installed at the bottom end of the sliding rod 26. The pressing plate 25 is located inside the discharge chamber 18. A second spring 27 is sleeved on the outer wall of the sliding rod 26. The bottom end of the second spring 27 is fixedly connected to the top of the extension box 17 through a spring seat, and the top end of the second spring 27 is fixedly connected to the outer wall of the sliding rod 26 through a spring seat. When the pressing plate 25 descends, it can press down on the aluminum-based heat sink 1 and the high-frequency ceramic substrate 2 below, which helps to ensure that the two are stably assembled and tightly attached.

[0055] In this embodiment, the bottom of the tooling base 7 has a liquid collection hole 13, which corresponds to the pump head 12. The bottom of the tooling base 7 is fixedly installed with an internal thread interface, which corresponds to the liquid collection hole 13. The internal thread interface is threaded with a liquid collection tank 14, which is used to collect conductive adhesive that is accidentally discharged from the pump head 12.

[0056] The working principle and usage process of this technical solution are as follows: When using this installation fixture, the operator can place multiple pre-treated high-frequency ceramic substrates 2 into the storage cylinder 9. During installation, the aluminum-based heat sink 1 can be slidably placed on top of the sliding seat 8. The aluminum-based heat sink 1 can be limited by the L-shaped plates 15 on both sides, and then one side can abut against the limiting plate 16 to achieve center positioning of the aluminum-based heat sink 1. Subsequently, the user can push the sliding seat 8 to move along the slide rail to below the pump head 12 of the liquid storage tank 11. Pressing the pump head 12 can inject an appropriate amount of thermally conductive adhesive into the top of the aluminum-based heat sink 1. The structure of the pump head 12 is similar to that of existing hand sanitizer pump heads, and the operator can discharge the corresponding amount of thermally conductive adhesive with one press. After adding the adhesive, push the sliding seat 8 back to its original position so that the top of the aluminum-based heat sink 1 is aligned with the bottom opening of the extension box 17.

[0057] The operator can then manually operate lever 21 to move push plate 19 into storage cylinder 9, pushing the bottom high-frequency ceramic substrate 2 into the discharge chamber 18 of extension box 17. The high-frequency ceramic substrate 2 falls through the opening at the bottom of discharge chamber 18, precisely covering the top of aluminum-based heat sink 1. Simultaneously, stopping the pusher 19 allows it to automatically reset under the action of the first spring 24, at which point the next high-frequency ceramic substrate 2 in storage cylinder 9 can fall into the pre-discharge position.

[0058] Next, the operator can press down the sliding rod 26, causing the pressing plate 25 to apply vertical pressure to the high-frequency ceramic substrate 2. This pressure causes the aluminum-based heat sink 1 and the high-frequency ceramic substrate 2 to adhere tightly through the thermally conductive adhesive. At the same time, the corresponding positioning block 4 is embedded in the positioning groove 5, which can achieve the initial installation and positioning of the aluminum-based heat sink 1 and the high-frequency ceramic substrate 2. After the assembly is completed, the assembly can be removed for further processing. At the same time, a new aluminum-based heat sink 1 is removed, and the above operation is repeated to start a new round of installation and assembly.

[0059] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0060] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A power distribution board for a multi-rotor unmanned aerial vehicle, characterized in that, include: An aluminum-based heat sink (1) and a high-frequency ceramic substrate (2) are attached to the top of the aluminum-based heat sink (1). Multiple copper foil power layers (3) are fixedly installed on the top of the high-frequency ceramic substrate (2). Conductive adhesive is provided between the aluminum-based heat sink (1) and the high-frequency ceramic substrate (2). The conductive adhesive makes the two fully and tightly attached and achieves initial fixation. Multiple pin-shaped heat dissipation fins (6) are fixedly installed at the bottom of the aluminum-based heat sink (1). By expanding the heat dissipation surface area, the heat dissipation efficiency of the aluminum-based heat sink (1) is improved, and the copper foil power layer (3) is prevented from failing due to overheating.

2. The power distribution board for a multi-rotor UAV according to claim 1, characterized in that, The high-frequency ceramic substrate (2) has positioning grooves (5) at its four corners, and positioning blocks (4) are provided in each of the four positioning grooves (5). Two of the positioning blocks (4) diagonally opposite each other are fixedly connected to the inner wall of the corresponding positioning groove (5), and the other two positioning blocks (4) are fixedly connected to the top of the aluminum-based heat sink (1). The precise installation and positioning of the copper foil power layer (3) is achieved through the cooperation of the positioning blocks (4) and the positioning grooves (5).

3. An installation fixture for assembling and installing a power distribution board for a multi-rotor unmanned aerial vehicle as described in any one of claims 1-2, characterized in that, include: Tooling base (7), the top of the tooling base (7) is slidably mounted with a sliding seat (8) via a slide rail, the sliding seat (8) is used to place and position the aluminum-based heat sink (1); Storage tube (9) is fixedly installed on the top of tooling base (7) by a bracket. A gap is left between the storage tube (9) and the top of tooling base (7) for the sliding seat (8) to pass through. The storage tube (9) is used to store multiple high-frequency ceramic substrates (2) to be assembled. The discharge assembly is used to individually discharge the high-frequency ceramic substrate (2) from the storage cylinder (9); A liquid storage tank (11) is used to store conductive adhesive added between the aluminum-based heat sink (1) and the high-frequency ceramic substrate (2).

4. The installation fixture according to claim 3, characterized in that, The discharge assembly includes an extension box (17) fixedly installed on one side of the storage cylinder (9). The bottom of the extension box (17) is provided with an opening. The interior of the extension box (17) forms a discharge cavity (18). The opening matches the high-frequency ceramic substrate (2), so that the high-frequency ceramic substrate (2) moved into the discharge cavity (18) is discharged from the opening under the action of gravity. A discharge port is provided on one side of the discharge cavity (18). The size of the discharge port matches the width and thickness of the high-frequency ceramic substrate (2). A push plate (19) slides through the side of the storage cylinder (9) away from the extension box (17). One side of the push plate (19) cooperates with the adjacent high-frequency ceramic substrate (2) to push out the corresponding high-frequency ceramic substrate (2). A fixing block (20) is fixedly installed on the top of the push plate (19). A lever (21) is fixedly installed on the top of the fixing block (20). The fixing block (20) is located on the side of the push plate (19) away from the storage cylinder (9).

5. The installation fixture according to claim 4, characterized in that, A fixed frame (22) is fixedly installed on one side of the storage tube (9). A guide rod (23) is fixedly installed on the inner wall of one side of the fixed frame (22). The other end of the guide rod (23) is fixedly connected to one side of the storage tube (9). The fixed block (20) is slidably sleeved on the outer wall of the guide rod (23). A first spring (24) is sleeved on the outer wall of the guide rod (23). One end of the first spring (24) is fixedly connected to one side of the storage tube (9) through a spring seat. The other end of the first spring (24) is fixedly connected to one side of the fixed block (20) through a spring seat. The push plate (19) is automatically pulled out and reset by the elastic force of the first spring (24). A sliding groove is opened on the top of the fixed frame (22). The top end of the lever (21) passes through the sliding groove. The push plate (19) is easily pushed by the lever (21).

6. The installation fixture according to claim 5, characterized in that, A sliding rod (26) slides through the top of the extension box (17). A pressing plate (25) is fixedly installed at the bottom end of the sliding rod (26). The pressing plate (25) is located in the discharge chamber (18). A second spring (27) is sleeved on the outer wall of the sliding rod (26). The bottom end of the second spring (27) is fixedly connected to the top of the extension box (17) through a spring seat. The top end of the second spring (27) is fixedly connected to the outer wall of the sliding rod (26) through a spring seat. When the pressing plate (25) descends, it applies pressure to the aluminum-based heat sink (1) and the high-frequency ceramic substrate (2) below to ensure that the two are stably bonded by conductive adhesive.

7. The installation fixture according to claim 3, characterized in that, A support frame (10) is fixedly installed at the bottom of the liquid storage tank (11). The support frame (10) is fixedly connected to the top of the tooling base (7) through a bracket. A pump head (12) is fixedly connected to one side of the liquid storage tank (11). The conductive adhesive in the liquid storage tank (11) is pumped out quantitatively to the aluminum-based heat sink plate (1) through the pump head (12).

8. The installation fixture according to claim 7, characterized in that, The tooling base (7) has a liquid collection hole (13) at the bottom, which corresponds to the pump head (12). The tooling base (7) has an internal thread interface fixedly installed at the bottom, which corresponds to the liquid collection hole (13). The internal thread interface is threaded with a liquid collection tank (14) to collect conductive glue accidentally discharged by the pump head (12).

9. An installation fixture according to claim 3, characterized in that, When the sliding seat (8) moves to both ends, its center part corresponds to the opening at the bottom of the discharge chamber (18) and the pump head (12), respectively. L-shaped plates (15) are fixedly installed on the top of the sliding seat (8) near both sides. The two L-shaped plates (15) are used to guide the sliding installation of the aluminum-based heat sink (1). A limiting plate (16) is fixedly installed on the top of the sliding seat (8). The sliding position of the aluminum-based heat sink (1) is limited by the limiting plate (16), so that one side of the aluminum-based heat sink (1) is accurately located at the center of the sliding seat (8) after abutting against the limiting plate (16).

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