An evtol low voltage distribution box

Abstract

The utility model discloses a kind of eVTOL distribution box, low-voltage distribution box includes: distribution box shell and multiple air duct structures;The top of distribution box shell is provided with multiple communicating ports, and any air duct structure is correspondingly installed in one communicating port in multiple communicating ports;Any air duct structure includes: air duct shell, air duct plate and heat dissipation part, air duct shell covers the position corresponding to corresponding communicating port, one end of heat dissipation part is connected with air duct shell, and air duct plate is installed in the top of heat dissipation part;Communicating port, air duct shell, air duct plate and heat dissipation part form the heat dissipation path that distribution box shell exports heat to external environment outwardly.The utility model is provided with multiple air duct structures, air duct structure promptly blows to external environment along the preset heat dissipation path with the heat dissipated by corresponding communicating port, increases the heat dissipation efficiency of distribution box shell, and it is favorable for distribution box to maintain stable output power in preset temperature range.

Description

Technical Field

[0001] This utility model relates to the field of distribution boxes, and in particular to an eVTOL low-voltage distribution box. Background Technology

[0002] The low-voltage distribution box is one of the core hubs of the eVTOL electrical system, responsible for safely and efficiently distributing the electrical energy provided by the battery or motor to many critical loads such as the flight control system, avionics system, lighting, communication, sensors, and servo actuators.

[0003] The current lack of directional airflow design in low-voltage distribution boxes leads to low heat dissipation efficiency. This causes hot air generated during operation to accumulate on the top or in corners of the cabinet, creating a "heat island effect." Hot air lingers on the top or in enclosed corners, forming localized high-temperature zones. These localized high temperatures trigger equipment protection mechanisms, reducing the output power of the distribution box. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art. This utility model provides an eVTOL low-voltage distribution box, which is equipped with multiple air duct structures. The air duct structures blow the heat emitted from the corresponding connection ports to the external environment in a timely manner along the preset heat dissipation path, thereby increasing the heat dissipation efficiency of the distribution box shell and helping the distribution box maintain a stable output power within the preset temperature range.

[0005] Accordingly, this utility model proposes an eVTOL low-voltage distribution box, which includes: a distribution box shell and multiple air duct structures;

[0006] The top of the power distribution box housing is provided with multiple communication ports, and any of the air duct structures is installed at one of the multiple communication ports.

[0007] Any of the aforementioned air duct structures includes: an air duct shell, an air duct plate, and a heat dissipation unit. The air duct shell covers the position corresponding to the corresponding connection port. One end of the heat dissipation unit is connected to the air duct shell, and the air duct plate is installed on the top of the heat dissipation unit.

[0008] The connecting port, the air duct shell, the air duct plate, and the multiple heat dissipation fins form a heat dissipation path for the power distribution box shell to output heat to the external environment.

[0009] Preferably, a connecting plate is provided between two adjacent heat dissipation parts, and the connecting plate is located at one end of the corresponding two heat dissipation parts near the air duct housing.

[0010] Preferably, the heat dissipation part includes multiple heat dissipation fins, and the array of multiple heat dissipation fins is distributed on one side of the air duct shell;

[0011] A heat dissipation airflow channel is formed between two adjacent heat dissipation fins.

[0012] Preferably, the air duct housing integrates multiple DC axial fans, and the output end of any one of the DC axial fans faces the heat dissipation unit.

[0013] Preferably, the power distribution box has a mounting cavity, a PCB board is disposed inside the mounting cavity, and a plurality of positioning pins are disposed at the bottom of the mounting cavity;

[0014] The PCB board is fixed in the mounting cavity based on the positioning pin.

[0015] Preferably, a thermal pad is provided on the top of the PCB board, the bottom of the thermal pad is connected to the PCB board, and the top of the thermal pad is connected to the top of the power distribution box.

[0016] Preferably, a relay is also provided in the mounting cavity, the relay is located on one side of the PCB board, and the bottom of the relay is fixedly connected to the bottom of the mounting cavity.

[0017] Preferably, the power distribution box housing includes a front panel, which has multiple connection holes, each of which is provided with an aviation plug.

[0018] Preferably, the bottom of the distribution box housing is provided with multiple fixed frustums, and each of the fixed frustums is provided with a fixed circular hole.

[0019] Preferably, the four corners of the distribution box housing are provided with angle aluminum.

[0020] The beneficial effects of this utility model are:

[0021] This invention features multiple air duct structures on the eVOLT power distribution box, with multiple connection ports on the top of the box housing. Each air duct structure corresponds to one connection port, allowing the air duct structure to promptly blow heat emitted from the corresponding connection port to the external environment, increasing the heat dissipation efficiency of the power distribution box housing and helping it maintain stable output power within a preset temperature range. The invention also includes connection ports, an air duct shell, an air duct plate, and multiple heat dissipation fins, forming a heat dissipation path for the power distribution box housing to output heat to the external environment. This allows heat inside the power distribution box housing to be dissipated quickly along this path, further improving the heat dissipation efficiency of the power distribution box housing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a first structural schematic diagram of the low-voltage distribution box of this utility model;

[0024] Figure 2 This is a schematic diagram of the second structure of the low-voltage distribution box of this utility model;

[0025] Figure 3 This is an exploded view of the low-voltage distribution box of this utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the distribution box housing in this utility model.

[0027] In the attached diagram: 1. Distribution box housing; 10. Mounting cavity; 11. Connecting port; 12. Positioning pin; 13. Distribution box front panel; 131. Connecting hole; 132. Aviation plug; 14. Fixed frustum; 15. Angle aluminum; 2. Air duct structure; 21. Air duct housing; 211. DC axial fan; 22. Air duct plate; 23. Heat dissipation part; 230. Heat dissipation air duct; 231. Heat dissipation fins; 24. Connecting plate; 3. PCB board; 31. Thermal pad; 4. Relay. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Figure 1 This diagram shows the first structural schematic of the low-voltage distribution box of this utility model. Figure 2 This diagram shows a second structural schematic of the low-voltage distribution box of this utility model. Figure 3 An exploded view of the low-voltage distribution box of this utility model is shown. Figure 4The diagram shows a structural schematic of the distribution box housing of this utility model. The low-voltage distribution box includes: a distribution box housing 1 and multiple air duct structures 2; the top of the distribution box housing 1 is provided with multiple connecting ports 11, and any one of the air duct structures 2 is installed at one of the multiple connecting ports 11; each air duct structure 2 includes: an air duct shell 21, an air duct plate 22, and a heat dissipation part 23. The air duct shell 21 covers the position corresponding to the connecting port 11, one end of the heat dissipation part 23 is connected to the air duct shell 21, and the heat dissipation part communicates with the air duct shell to ensure that air inside the air duct shell can enter. In the heat dissipation section, the air duct plate 22 is installed on top of the heat dissipation section 23. The air duct plate is located on top of the heat dissipation section to seal the top of the heat dissipation section, preventing gas from being directly dissipated from the top of the heat dissipation section to the external environment. This prevents the gas from flowing along a preset path, i.e., the gas cannot flow along the surface of the power distribution box housing to carry away the heat on the surface of the power distribution box housing. This facilitates the gas to effectively carry away the heat on the surface of the power distribution box housing, accelerating the heat dissipation efficiency of the power distribution box. The connecting port 11, the air duct housing 21, the air duct plate 22, and the heat dissipation section 23 form a heat dissipation path for the power distribution box housing 1 to output heat to the external environment. In this embodiment, the low-voltage power distribution box includes four air duct structures 2. The top of the power distribution box housing 1 is provided with four connecting ports 11. One of the four air duct structures 2 is correspondingly arranged with one of the four connecting ports 11. The air duct structure 2 is used to timely guide the heat dissipated from the corresponding connecting port 11 to the external environment, increasing the heat dissipation efficiency of the power distribution box housing 1. The connecting port 11, the air duct shell 21, the air duct plate 22, and the multiple heat dissipation fins 231 form a heat dissipation path for the power distribution box shell 1 to output heat to the external environment. This allows the heat inside the power distribution box shell 1 to be dissipated to the external environment along the heat dissipation path, thereby quickly dissipating the heat inside the power distribution box shell 1 to the external environment and improving the heat dissipation efficiency of the power distribution box shell 1.

[0030] Furthermore, a connecting plate 24 is provided between two adjacent heat dissipation sections 23, and the connecting plate 24 is located at one end of the corresponding two heat dissipation sections 23 near the air duct housing 21. The connecting plate 24 is used to block the space between the two heat dissipation sections 23, eliminate gap short-circuit backflow and reverse flow, and make most of the airflow flow along the preset heat dissipation path, thereby improving heat dissipation efficiency.

[0031] Furthermore, the heat dissipation unit 23 includes multiple heat dissipation fins 231, which are arrayed on one side of the air duct housing 21; a heat dissipation air duct 230 is formed between two adjacent heat dissipation fins 231. In this embodiment, the heat dissipation unit 23 includes nine heat dissipation fins 231, which are arrayed on one side of the air duct housing 21, and the nine heat dissipation fins 231 form eight heat dissipation air ducts 230. The inlets of the eight heat dissipation ducts 230 face the duct housing 21, and the outlets of the eight heat dissipation ducts 230 face the external environment. That is, the hot air flows from the inside of the power distribution box housing 1 into the duct housing 21, and then enters the eight different heat dissipation ducts 230 from the duct housing 21. This avoids the formation of eddies at the end of a single duct due to sudden changes in flow velocity, which would cause the hot air to remain at the end of the duct and dissipate heat quickly. Dividing the air helps to reduce wind resistance and pressure drop, thereby reducing the power consumption of the fan.

[0032] Furthermore, the duct housing 21 integrates multiple DC axial fans 211, with the output end of any one of the DC axial fans 211 facing the heat dissipation unit 23. In this embodiment, the duct housing 21 integrates two DC axial fans 211. These two DC axial fans 211 increase the airflow speed and direction within the duct housing 21 and the heat dissipation duct 230, ensuring that hot air can be blown to the external environment along the direction of the heat dissipation duct 230. The output ends of the DC axial fans 211 are directly aligned with the heat dissipation unit 23, forming a "jet impact" that causes the gas to move along the airflow direction output by the DC axial fans 211, preventing airflow diffusion and hot air recirculation. This facilitates airflow along the heat dissipation path, accelerating the heat dissipation efficiency of the power distribution box.

[0033] It should be noted that the DC axial fan 211 uses a DC motor, which is 20%-30% more efficient than traditional AC motors. Especially at low speeds, it can more efficiently convert electrical energy into mechanical energy, reducing energy waste. Furthermore, the DC axial fan 211 supports real-time speed adjustment based on parameters such as temperature, humidity, and load.

[0034] Furthermore, the power distribution box housing 1 has a mounting cavity 10, in which a PCB board 3 is disposed. Multiple positioning pins 12 are provided at the bottom of the mounting cavity 10. The PCB board 3 is fixed in the mounting cavity 10 based on the positioning pins 12. In this embodiment, twenty positioning pins 12 are provided at the bottom of the mounting cavity 10, and these twenty positioning pins 12 are evenly distributed at the bottom of the mounting cavity 10. Corresponding through holes are provided on the PCB board 3 to engage with the twenty positioning pins 12. The positioning pins 12 can be inserted into the corresponding through holes, fixing the PCB board 3 from twenty different positions. The twenty positioning pins 12 can form a multi-point support structure, effectively dispersing external vibrations or impacts, preventing the PCB board 3 from deforming or loosening due to mechanical stress, and facilitating the precise installation of the PCB board 3 in the corresponding positions. This reduces signal reflection or timing deviations caused by mechanical vibration, ensuring data transmission stability. The twenty positioning pins 12 can serve as auxiliary structures for electromagnetic shielding. By connecting with the outer casing or grounding layer, they can reduce the radiation or coupling of electromagnetic interference (EMI). This design can form a more complete shielding path and improve the equipment's anti-interference capability.

[0035] Furthermore, a thermal pad 31 is provided on the top of the PCB board 3. The bottom of the thermal pad 31 is connected to the PCB board 3, and the top of the thermal pad 31 is connected to the top of the power distribution box housing. The thermal pad 31 is used to quickly transfer heat to the corresponding location. That is, the bottom of the thermal pad 31 is connected to the PCB board 3, and the top of the thermal pad 31 is connected to the top of the power distribution box housing 1. The thermal pad 31 transfers the heat generated by the PCB board 3 during operation to the top of the power distribution box housing 1 in a timely manner, and then dissipates it through the top of the power distribution box housing 1 to the bottom of the corresponding heat dissipation duct 230. This facilitates the airflow blown out by the heat dissipation part 23 to carry the heat transferred to the corresponding heat dissipation duct 230, thereby accelerating the heat dissipation efficiency of the low-voltage power distribution box.

[0036] Specifically, when the PCB board 3 inside the mounting cavity 10 starts working, it generates heat, causing the internal temperature of the mounting cavity 10 to rise. The heated air then enters the corresponding air duct housing 21 through the connecting port 11. Furthermore, some of the heat generated by the PCB board 3 during operation is transferred to the bottom of the heat dissipation air duct 230 through the thermal pad 31. The DC axial fan 211 located in the air duct housing 21 operates, causing the air carrying heat in the air duct housing 21 to flow along the corresponding heat dissipation path, increasing the airflow velocity on the surface of the power distribution box housing 1, and ensuring that the heated air flowing into the air duct housing 21 flows to the external environment, thus enhancing the heat dissipation efficiency of the low-voltage power distribution box.

[0037] It should be noted that four working circuit boards are provided on the PCB board 3, and the four working circuit boards are respectively arranged corresponding to the four air duct structures 2. That is, each air duct structure 2 is located above a working circuit board, which facilitates the direct transfer of heat from the working circuit board to the air duct structure 2, thereby accelerating heat dissipation efficiency. Each working circuit board has a positioning pin at each of its four corners. The positioning pins raise the corresponding working circuit board, leaving a certain heat dissipation gap between the working circuit board and the PCB board. Furthermore, the four working circuit boards are arranged parallel to each other on the PCB board, and the distance between any two adjacent working circuit boards is equal. The four working circuit boards are evenly distributed on the PCB board 3, improving the layout between the four working circuit boards and the PCB board 3. A reasonable wire layout can improve circuit performance and reduce manufacturing costs.

[0038] Furthermore, a relay 4 is also provided within the mounting cavity 10. The relay 4 is located on one side of the PCB board 3, and its bottom is fixedly connected to the bottom of the mounting cavity 10. In this embodiment, a partition is provided within the mounting cavity 10 to separate the relay 4 and the PCB board 3. The area where the relay 4 is located is a high-voltage area, and the area where the PCB board 3 is located is a low-voltage area. The two areas are separated by a partition to achieve electromagnetic shielding of more than 30dB, avoiding cross-interference of signal lines between the two areas, which is beneficial to improving the accuracy of digital signals. The bottom of the relay 4 is fixedly connected to the bottom of the mounting cavity 10, and a partition is provided between the relay 4 and the PCB board 3 to reduce the risk of the relay 4 shaking and impacting the PCB board 3 during use, thus reducing the risk of damage to the PCB board 3.

[0039] Furthermore, the power distribution box housing 1 includes a front panel 13, on which a plurality of connection holes 131 are provided, and each connection hole 131 is provided with a connector 132. In this embodiment, the front panel 13 of the power distribution box is provided with seven connection holes 131, and each of the seven connection holes 131 is provided with a corresponding connector 132, that is, the power distribution box housing 1 is provided with seven connectors 132. A certain distance is left between two adjacent connectors 132 to avoid cable tangling during installation, which helps to ensure sufficient operating space after the connectors 132 are installed. In addition, the connectors 132 have high dustproof and waterproof performance, preventing conductive particles from depositing on the contact surface and causing short circuits, or insulating particles from reducing signal transmission quality, which helps to reduce the risk of random failures such as poor contact and insulation failure caused by environmental factors in the power distribution box.

[0040] Furthermore, the bottom of the distribution box housing 1 is provided with multiple fixed frustums 14, each of which has a fixing hole. The bottom of the distribution box housing 1 has twelve fixed frustums 14, each with a fixing hole, meaning the distribution box housing 1 has a total of twelve fixing holes. Three fixed frustums 14 are provided on each side of the bottom of the distribution box housing 1, with equal distances between adjacent fixed frustums 14 on the same side. These three fixed frustums 14 evenly distribute the weight of the bottom of the housing or external forces to three support points, avoiding localized stress concentration caused by single or double-point support, and reducing the risk of housing deformation or frustum loosening over long-term use.

[0041] Furthermore, angle aluminum 15s are provided at the four apex corners of the power distribution box housing 1. The angle aluminum 15s are used to connect the two mutually perpendicular sidewalls of the power distribution box housing 1, thereby strengthening the connection strength of the two sidewalls. The angle aluminum 15s also protect the four apex corners of the power distribution box housing 1, preventing the power distribution box housing 1 from being dented during transportation due to collisions. This helps to strengthen the structural strength of the apex corners of the power distribution box housing 1 and reduces the risk of wear on the PCB board 3 caused by dents at the apex corners of the power distribution box.

[0042] In summary, this invention features multiple air duct structures on the eVOLT power distribution box, with multiple connection ports on the top of the box housing. Each air duct structure corresponds to one connection port, and the air duct structure effectively blows the heat emitted from the corresponding connection port to the external environment, increasing the heat dissipation efficiency of the power distribution box housing. This helps the power distribution box maintain stable output power within a preset temperature range. Furthermore, this invention includes connection ports, an air duct shell, an air duct plate, and multiple heat dissipation fins, which together form a heat dissipation path for the power distribution box housing to output heat to the external environment. This allows the heat inside the power distribution box housing to be dissipated along this path, quickly releasing heat from the internal components and further improving the heat dissipation efficiency of the power distribution box housing.

[0043] Furthermore, the above description provides a detailed explanation of the eVTOL low-voltage distribution box provided in the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An eVTOL low-voltage distribution box, characterized in that, The low-voltage distribution box includes: a distribution box housing and multiple air duct structures; The top of the power distribution box housing is provided with multiple communication ports, and any of the air duct structures is installed at one of the multiple communication ports. Any of the aforementioned air duct structures includes: an air duct shell, an air duct plate, and a heat dissipation unit. The air duct shell covers the position corresponding to the corresponding connection port. One end of the heat dissipation unit is connected to the air duct shell, and the air duct plate is installed on the top of the heat dissipation unit. The connection port, the duct housing, the duct plate, and the multiple heat dissipation sections form a heat dissipation path for the power distribution box housing to output heat to the external environment.

2. The eVTOL low-voltage distribution box according to claim 1, characterized in that, A connecting plate is provided between two adjacent heat dissipation parts, and the connecting plate is located at one end of the corresponding two heat dissipation parts near the air duct housing.

3. The eVTOL low-voltage distribution box according to claim 1, characterized in that, The heat dissipation unit includes multiple heat dissipation fins, and the array of multiple heat dissipation fins is distributed on one side of the air duct shell; A heat dissipation airflow channel is formed between two adjacent heat dissipation fins.

4. The eVTOL low-voltage distribution box according to claim 1, characterized in that, The air duct housing integrates multiple DC axial fans, and the output end of any one of the DC axial fans faces the heat dissipation unit.

5. The eVTOL low-voltage distribution box according to claim 1, characterized in that, The power distribution box has a mounting cavity, a PCB board is installed inside the mounting cavity, and a plurality of positioning pins are provided at the bottom of the mounting cavity. The PCB board is fixed in the mounting cavity based on the positioning pin.

6. The eVTOL low-voltage distribution box according to claim 5, characterized in that, A thermal pad is provided on the top of the PCB board, the bottom of the thermal pad is connected to the PCB board, and the top of the thermal pad is connected to the top of the power distribution box.

7. The eVTOL low-voltage distribution box according to claim 5, characterized in that, A relay is also provided inside the mounting cavity. The relay is located on one side of the PCB board, and the bottom of the relay is fixedly connected to the bottom of the mounting cavity.

8. The eVTOL low-voltage distribution box according to claim 1, characterized in that, The power distribution box housing includes a front panel, which has multiple connection holes, each with an aviation plug.

9. The eVTOL low-voltage distribution box according to claim 1, characterized in that, The bottom of the power distribution box housing is provided with multiple fixed truncated cones, and each of the fixed truncated cones is provided with a fixed circular hole.

10. The eVTOL low-voltage distribution box according to claim 1, characterized in that, Angle aluminum is provided at the four top corners of the power distribution box housing.

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