Underwater electric power receiving device

Abstract

The application relates to an underwater electric energy receiving device, which comprises an electric energy receiving part provided with an electric energy receiving surface and a heat radiating part attached to the electric energy receiving surface, wherein the heat radiating part is provided with a plurality of heat radiating channels, each of which is provided with an opening communicating with the external water body. The underwater electric energy receiving device is specially structured to form the heat radiating channels suitable for the underwater electric energy receiving device, so that the heat generated by the operation of the underwater electric energy receiving device can be directly conducted to the external water body and exchanged with the external water body, thereby effectively improving the heat radiating efficiency of the underwater electric energy receiving device without affecting the charging efficiency.

Description

Technical Field

[0001] This invention relates to the field of underwater wireless charging technology, and in particular to an underwater power receiving device and its heat dissipation system for underwater wireless charging. Background Technology

[0002] With the development of underwater robots, unmanned vessels, and other technologies, the power supply for these devices has received increasing attention and research. Existing technologies mainly include two charging methods: charging using contact charging devices and wireless charging technology for unmanned vessels. Among these, wireless charging technology has received more attention due to its convenience and safety advantages, especially underwater wireless charging technology.

[0003] The underwater wireless charging device uses an integrated power supply circuit, which includes a high-power conversion circuit. This high-power conversion circuit is often implemented using a half-bridge or full-bridge circuit structure. During the wireless charging process of the unmanned vessel, a large current flows into the high-power conversion circuit, generating a lot of heat. Furthermore, the integrated power supply circuit often uses switching electronic devices such as IGBTs or MOSFETs, which generate device losses during operation, thereby further increasing the heat generation.

[0004] To address the aforementioned heat dissipation issues, existing technologies often employ methods such as adding a sealed cavity to the underwater wireless charging system and injecting coolant into the sealed cavity for heat dissipation. However, this approach has low heat dissipation efficiency and complex structure. Furthermore, existing heat dissipation systems address the entire underwater wireless charging system, often focusing on heat dissipation at the charging end while neglecting the heat dissipation requirements of the wireless power receiver, which is separate from the charging end. This results in low heat dissipation efficiency at the wireless power receiver, affecting the efficiency of wireless power transmission. Summary of the Invention

[0005] Therefore, it is necessary to provide an underwater power receiving device with a special heat dissipation structure design to address the heat dissipation problem of wireless power receiving devices.

[0006] An underwater power receiving device includes a power receiving part having a power receiving surface; and a heat dissipation part attached to the power receiving surface; wherein the heat dissipation part has a plurality of heat dissipation channels, each heat dissipation channel having an opening communicating with an external water body.

[0007] In one embodiment, the heat dissipation portion extends longitudinally along a first direction and includes a first end and a second end disposed opposite to each other in the first direction; the heat dissipation channel includes a first straight segment, a curved segment, and a second straight segment connected in sequence, the curved segment being located at the second end of the heat dissipation portion, one end of the first straight segment being connected to the first end of the heat dissipation portion, and the other end extending along the first direction to the second end of the heat dissipation portion and being connected to one end of the curved segment, one end of the second straight segment being connected to the other end of the curved segment, and the other end of the second straight segment extending along the first direction to the second end of the heat dissipation portion.

[0008] In one embodiment, the power receiving surface is an arc surface extending longitudinally along a first direction, and the heat dissipation part is attached to the power receiving surface in the form of an arc surface that matches the power receiving surface.

[0009] In one embodiment, the heat dissipation part includes a heat dissipation housing and at least one heat-conducting element. The heat dissipation housing has a heat dissipation cavity with one end open. The heat-conducting element is located inside the heat dissipation cavity and divides the heat dissipation cavity to form the heat dissipation channel.

[0010] In one embodiment, the heat dissipation portion includes a first heat-conducting plate, which is disposed on the side of the heat dissipation channel near the power receiving portion and is attached to the power receiving surface; wherein the first heat-conducting plate and the power receiving surface have the same curvature.

[0011] In one embodiment, the heat dissipation part further includes a second heat-conducting plate, which is disposed along a second direction on the side of the heat dissipation channel away from the power receiving part, and a control unit is provided on the second heat-conducting plate.

[0012] In one embodiment, the underwater power receiving device further includes a protective shell, which covers the side of the second heat-conducting plate away from the heat dissipation part. The second heat-conducting plate and the shell together form a receiving cavity, and the control unit is disposed in the receiving cavity.

[0013] In one embodiment, the power receiving surface further includes an extension end located on the side of the power receiving surface away from the heat dissipation channel, and the extension end is provided with a connecting hole.

[0014] According to another aspect of this application, an underwater wireless charging system is provided, including the above-described underwater power receiving device, and further including an underwater power transmitting device, wherein the underwater power transmitting device includes a power transmitting part electrically connected to the power receiving part of the underwater power receiving device.

[0015] In one embodiment, one side surface of the power emitting part forms a power emitting surface; the power emitting surface and the power receiving surface of the underwater power receiving device are arc surfaces with the same curvature, and the power receiving surface and the power emitting surface can be attached to each other and electrically connected.

[0016] The aforementioned underwater power receiving device, through a special structural design, forms a heat dissipation channel suitable for underwater power receiving devices, enabling the heat generated by the underwater power receiving device to be directly conducted to the external water body and exchange heat with the external water body, effectively improving the heat dissipation efficiency of the underwater power receiving device. Attached Figure Description

[0017] Figure 1 A schematic diagram illustrating the application of an underwater power receiving device according to an embodiment of this application;

[0018] Figure 2 A three-dimensional isometric view of an underwater power receiving device provided in an embodiment of this application;

[0019] Figure 3 A front view of an underwater power receiving device provided in an embodiment of this application;

[0020] Figure 4 Left sectional view of a front view of an underwater power receiving device provided in an embodiment of this application;

[0021] Figure 5 A top sectional view of the front view of an underwater power receiving device provided in an embodiment of this application;

[0022] Figure 6 An assembly diagram of an underwater power receiving device provided in an embodiment of this application;

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Power receiving unit; 11. Power receiving surface; 111. Extension end; 112. Connecting hole; 12. Wireless charging receiving coil; 13. Anti-interference component; 2. Heat dissipation unit; 21. Heat dissipation channel; 211. Inlet and outlet; 22. Side plate; 23. First heat conduction plate; 24. Second heat conduction plate; 241. Protective shell; 25. Heat conduction component; 251. First straight section; 252. Bending section; 253. Second straight section; 3. Unmanned boat. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, 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 invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] One embodiment of this application provides an underwater power receiving device applied in an underwater wireless charging system, see reference. Figure 1 , Figure 1 The diagram shows the underwater power receiving device provided in this application connected to a device to be charged (the device to be charged shown in the figure is an unmanned vessel 3) in an underwater wireless charging system. The underwater power receiving device is provided with a power receiving part 1 and a heat dissipation part 2. The heat dissipation part 2 includes a heat dissipation channel 21 with an opening that connects to the external water body, so that the water flow in the external water body can enter the heat dissipation channel 21 through the opening, thereby accelerating the heat exchange between the heat dissipation part 2 and the external water body.

[0032] Specifically, see Figure 2 , Figure 4 , Figure 6 The heat dissipation part 2 includes a heat dissipation shell and a heat-conducting element 25 disposed within the heat dissipation shell. The heat dissipation shell is oriented along a first direction ( Figure 1 , Figure 3 The hollow shell structure extending longitudinally in the X direction includes a first end and a second end disposed opposite to each other in the first direction. The heat dissipation shell has a heat dissipation cavity, which extends from the first end to the second end in the first direction. The first end has an opening that connects the heat dissipation cavity to the external water body. The heat-conducting element 25 is located in the heat dissipation cavity and divides the heat dissipation cavity to form a heat dissipation channel 21. By using the heat-conducting element 25 and the heat dissipation channel 21 to dissipate heat at the same time, the heat dissipation efficiency can be effectively improved.

[0033] The heat dissipation housing includes a side plate 22, a first heat-conducting plate 23, and a second heat-conducting plate 24. The first heat-conducting plate 23 and the second heat-conducting plate 24 are in the second direction (i.e. Figure 3 The side plate 22 is spaced apart in the Y direction and is connected between the first heat-conducting plate 23 and the second heat-conducting plate 24. The side plate 22, the first heat-conducting plate 23 and the second heat-conducting plate 24 together form a heat dissipation cavity, and the opening of the heat dissipation cavity is formed on the side plate 22.

[0034] Thus, the first heat-conducting plate 23 is used to conduct the heat generated by the power receiving unit 1 to the heat dissipation unit 2. The underwater power receiving device exchanges heat with the water in the heat dissipation cavity, which can prevent the water from directly contacting the power receiving unit 1 and causing impact and damage to the power receiving unit 1.

[0035] The heat-conducting element 25 protrudes from the side of the first heat-conducting plate 23 facing the heat dissipation cavity and extends along the second direction to abut against the second heat-conducting plate 24. In some embodiments, the heat-conducting element 25 is formed of a heat pipe, which can both radiate heat to the water flow in the heat dissipation channel 21 for heat dissipation and carry heat from the heat dissipation cavity to the opening, where it can directly exchange heat with the external water, thereby improving the efficiency of heat dissipation.

[0036] In some embodiments, see Figure 5 The heat-conducting component 25 is U-shaped, thus forming a U-shaped heat dissipation channel 21 between the heat-conducting component 25 and the side plate 22 of the heat dissipation shell, and between adjacent heat-conducting components 25. Specifically, the heat dissipation channel 21 includes a first straight segment 251, a curved segment 252, and a second straight segment 253. One end of the first straight segment 251 is connected to the first end of the heat dissipation part 2 to form an inlet / outlet 211, and the other end extends along the first direction to the second end of the heat dissipation part 2 and connects to one end of the curved segment 252. One end of the second straight segment 253 is connected to the first end of the heat dissipation part 2, and the other end extends along the first direction to the second end of the heat dissipation part 2 and connects to the other end of the curved segment 252 to form an inlet / outlet 211. Therefore, the water flow from the external water body circulates inside the heat dissipation channel 21 through the inlet / outlet 211. The arrangement of the heat dissipation channel 21 increases the contact area between the heat-conducting component 25 and the water body, further improving the efficiency of heat exchange, thereby achieving efficient heat dissipation.

[0037] In some embodiments, see Figure 2 , Figure 4 , Figure 6 The second heat-conducting plate 24 is also provided with a protective shell 241 on the side away from the heat dissipation part 2 along the second direction. The second heat-conducting plate 24 and the protective shell 241 together form a receiving cavity. A control unit is provided in the receiving cavity to control the circuit of the entire power receiving device. In some embodiments, the control unit includes an integrated power supply circuit. The integrated power supply circuit includes a high-power conversion circuit, switching electronic devices and other heat-generating elements. The heat generated by the heat-generating parts is conducted to the heat dissipation channel 21 and the heat-conducting element 25 through the second heat-conducting plate 24. This can prevent water from contacting the integrated power supply circuit and make full use of the external water for heat dissipation, which can significantly improve the heat dissipation efficiency.

[0038] In this application, a heat dissipation section 2 is formed by a heat-conducting element 25, a heat dissipation channel 21, and a heat-conducting plate. Heat is dissipated through two methods: the heat-conducting element 25 carries heat from the heat dissipation cavity to the opening, and the heat dissipation channel 21 conducts heat to the water within the channel. When foreign objects in the external water enter the heat dissipation channel 21 and cause blockage, the heat dissipation channel 21 in the prior art becomes almost unable to dissipate heat. The design of this application effectively avoids the problem of a single heat dissipation method used in existing underwater wireless charging systems. In some embodiments, multiple heat-conducting elements 25 are parallel to each other, forming multiple parallel heat dissipation channels 21, further increasing the contact area between the heat-conducting elements 25 and the water, and improving the efficiency of heat conduction.

[0039] See Figure 4 , Figure 6 The power receiving unit 1 has a power receiving surface 11, on which multiple power receiving units are provided. The power receiving surface 11 is an arc surface extending longitudinally along a first direction. A shell is provided on the power receiving surface 11 extending along a second direction, covering and surrounding the aforementioned heat dissipation unit 2, accommodating cavity, etc., within the shell, adding another layer of protection for the heat dissipation unit 2, etc., to prevent them from being damaged by collision with water or debris. The power receiving units are also arc-shaped and fitted onto the power receiving surface 11 to increase magnetic flux exchange and improve charging efficiency. At the same time, the first heat-conducting plate 23, the heat-conducting element 25, and the heat dissipation channel 21 are all fitted onto the power receiving surface 11. The first heat-conducting plate 23 is in contact with the power receiving units. In some embodiments, the first heat-conducting plate 23, the heat-conducting element 25, and the heat dissipation channel 21 are arc-shaped surfaces that match the power receiving surface 11. This configuration allows the underwater power receiving device to improve charging efficiency while also effectively dissipating heat through the heat dissipation unit 2.

[0040] In some embodiments, see Figure 6 All power receiving units are arranged at intervals along the first direction. Each power receiving unit includes a wireless charging receiving coil 12 and an anti-interference component 13. The wireless charging receiving coil 12 is disposed on one side surface of the power receiving part, and the anti-interference component 13 is disposed on the side of the wireless charging receiving coil 12 away from the power receiving part. The wireless charging receiving coil has a slightly curved design. The curvature of this curve has been optimized. The optimized curvature improves the magnetic coupling coefficient during the wireless charging process and improves the wireless charging efficiency of the underwater wireless charging system.

[0041] In some embodiments, the power receiving surface 11 has a drain hole on one side of the curved section 252 of the heat-conducting component 25, which communicates with the external water body. This allows the water from the external water body to enter the heat dissipation channel 21 through any one inlet / outlet 211 and then flow out of the heat dissipation channel 21 through another inlet / outlet 211 and the drain hole, thereby increasing the water circulation speed in the heat dissipation channel 21 and thus improving the heat dissipation efficiency.

[0042] In some embodiments, see Figure 2 , Figure 3 The power receiving surface 11 also includes an extension end 111 extending away from the heat dissipation cavity along a first direction and close to the inlet and outlet 211 of the heat dissipation channel 21. This extension end is used to prevent debris in the external water from directly colliding with the power receiving unit, heat dissipation part 2, etc. Furthermore, a connecting hole 112 is provided on the extension end 111 of the power receiving surface 11 to allow the water flow of the external water to flow freely in a second direction, preventing hot water after heat exchange from accumulating on the extension end 111 and accelerating the water circulation speed of the external water on the extension end 111. In some embodiments, the connecting hole 112 can also be used as a limiting groove for fixed connection with other devices on the underwater wireless charging system, enhancing the stability of the underwater power receiving device.

[0043] In some embodiments, the underwater wireless charging system includes an underwater power transmitter, which is electrically connected to the power receiving section 1 of the underwater power receiving device. In some embodiments, one side surface of the power transmitter forms a power emitting surface; the power emitting surface and the power receiving surface 11 of the underwater power receiving device are arc surfaces with the same curvature, and the power receiving surface 11 and the power emitting surface can be attached to each other and electrically connected, thereby achieving efficient heat dissipation of the underwater power receiving device while ensuring the power receiving efficiency of the underwater power receiving device in this application.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An underwater electric power receiving device, characterized by comprising: include: The power receiving unit has a power receiving surface; and The heat dissipation part is attached to the power receiving surface; The heat dissipation unit has multiple heat dissipation channels, and each heat dissipation channel has an opening that connects to an external water body; The power receiving surface also includes an extension end, which is located away from the heat dissipation cavity along a first direction and close to the inlet and outlet of the heat dissipation channel. The extension end is provided with a connecting hole. The power receiving surface is an arc surface extending longitudinally along a first direction, and the heat dissipation part is attached to the power receiving surface and is an arc surface matching the power receiving surface; the power receiving surface is provided with a shell extending along a second direction, and the heat dissipation part covers and surrounds the shell, wherein the first direction and the second direction are perpendicular to each other; The heat dissipation part extends longitudinally along a first direction and includes a first end and a second end disposed opposite to each other in the first direction; The heat dissipation part includes a heat dissipation shell and at least one heat-conducting element. The heat dissipation shell has a heat dissipation cavity with one end open. The heat-conducting element is located inside the heat dissipation cavity and divides the heat dissipation cavity to form the heat dissipation channel.

2. The underwater power receiving device according to claim 1, characterized in that, The heat dissipation channel includes a first straight segment, a curved segment, and a second straight segment connected in sequence. The curved segment is located at the second end of the heat dissipation part. One end of the first straight segment is connected to the first end of the heat dissipation part, and the other end extends along the first direction to the second end of the heat dissipation part and is connected to one end of the curved segment. One end of the second straight segment is connected to the other end of the curved segment, and the other end of the second straight segment extends along the first direction to the first end of the heat dissipation part.

3. The underwater electric power receiving apparatus according to claim 1, characterized by The heat dissipation cavity includes a first heat-conducting plate, which is disposed on the side of the heat dissipation cavity near the power receiving part and is attached to the power receiving surface. The first heat-conducting plate and the power receiving surface have the same curvature.

4. The underwater electric power receiving apparatus according to claim 1, characterized by The heat dissipation cavity also includes a second heat-conducting plate, which is located on the side of the heat dissipation cavity away from the power receiving part, and a control unit is provided on the second heat-conducting plate.

5. The underwater electric power receiving apparatus according to claim 4, characterized by The underwater power receiving device also includes a protective shell, which covers the side of the second heat-conducting plate away from the heat dissipation part. The second heat-conducting plate and the shell together form a receiving cavity, and the control unit is located in the receiving cavity.

6. An underwater wireless charging system comprising the underwater electric energy receiving device according to any one of claims 1 to 5, characterized in that, It also includes an underwater power transmitting device, which includes a power transmitting part electrically connected to the power receiving part of the underwater power receiving device.

7. The underwater wireless charging system of claim 6, wherein, One side surface of the power transmitting unit forms a power transmitting surface; the power transmitting surface and the power receiving surface of the underwater power receiving device are arc surfaces with the same curvature, and the power receiving surface and the power transmitting surface can be attached to each other and electrically connected.

Images