Pressure-resistant watertight wireless power transmission magnetic coupling mechanism

Abstract

The utility model belongs to the technical field of wireless power transmission, and particularly relates to a pressure-resistant watertight wireless power transmission magnetic coupling mechanism which comprises a transmitting coil module and a receiving coil module, the transmitting coil module comprises a transmitting magnetic core support, and the receiving coil module comprises a receiving magnetic core support. The transmitting magnetic core support and the receiving magnetic core support are both arc-shaped platy bodies, the concave face of the transmitting magnetic core support and the convex face of the receiving magnetic core support are each provided with a set of ferrite magnetic cores, and the outer side face of each set of ferrite magnetic cores is provided with a litz coil matched with the corresponding ferrite magnetic core. The magnetic core support, the ferrite magnetic core corresponding to the magnetic core support and the litz coil corresponding to the magnetic core support are wrapped with a glue pouring plastic package body, and solid bodies formed by glue pouring are arranged in the glue pouring plastic package body and the glue pouring plastic package body. According to the utility model, a tile-shaped structure is adopted, the requirement of conformal installation equipment at a user can be met, the requirements of underwater pressure resistance and sealing can be met, and reliable operation of a wireless electric energy transmission system in an underwater environment is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of wireless power transmission technology, specifically relating to a pressure-resistant, watertight wireless power transmission magnetic coupling mechanism. Background Technology

[0002] In wireless power transmission systems, the transmitting coil and receiving coil together are called the magnetic coupling mechanism, which is the core component for realizing wireless power transmission. It directly affects multiple system characteristics, such as output power, transmission efficiency, cost, offset tolerance, and electromagnetic radiation. It is the core key component and research focus of wireless power transmission systems.

[0003] Currently, magnetic coupling mechanisms come in various shapes, including circular planar, square planar, spherical, and cylindrical, among others. These different mechanisms correspond to different magnetic field distributions and coupling relationships, making them suitable for various application scenarios and wireless power transmission systems. At present, domestic and international optimization designs for coils mainly focus on optimizing coil parameters such as the number of turns and coil spacing, with less attention paid to the coil's structural design itself.

[0004] Previous magnetic coupling mechanisms were mostly planar structures, which could not meet the conformal requirements of special underwater equipment, and paid little attention to meeting the requirements of underwater pressure resistance and sealing. Based on practical applications and needs, it is necessary to design a pressure-resistant, watertight wireless power transmission magnetic coupling mechanism. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a pressure-resistant, watertight wireless power transmission magnetic coupling mechanism.

[0006] The purpose of this utility model is achieved by the following technical solution. According to this utility model, a pressure-resistant, watertight wireless power transmission magnetic coupling mechanism includes a transmitting coil module and a receiving coil module. The transmitting coil module includes a transmitting magnetic core support, and the receiving coil module includes a receiving magnetic core support. Both the transmitting and receiving magnetic core supports are arc-shaped plates. A set of ferrite cores arranged along the arc length direction is provided on the concave surface of the transmitting magnetic core support and the convex surface of the receiving magnetic core support. A Litz coil matching the ferrite core is provided on the outer surface of each set of ferrite cores. The transmitting magnetic core support and its corresponding ferrite cores and Litz coils are externally encapsulated with a transmitting potting compound, and the receiving magnetic core support and its corresponding ferrite cores and Litz coils are externally encapsulated with a receiving potting compound. Both the transmitting and receiving potting compounds are solid bodies formed by potting.

[0007] Compared with the prior art, the advantages of this utility model are:

[0008] This utility model, combined with the needs of practical application scenarios, adopts a single transmitting and single receiving coil structure for the magnetic coupling mechanism. The power coil and data coil can be independent of each other to avoid mutual interference. The coil module adopts a tile-shaped structure, which not only meets the requirement of conformal installation with the user's equipment, but also ensures that the receiving coil is located within the envelope of the transmitting coil, thus guaranteeing that the receiving end can be offset at a certain angle.

[0009] This utility model patent features an internal potting and overall encapsulation structure that meets the requirements for underwater pressure resistance and sealing, ensuring the reliable operation of the wireless power transmission system in the underwater environment.

[0010] Furthermore, the transmitting magnetic core support is provided with two watertight cables whose ends are respectively connected to the starting end and the ending end of the corresponding Litz coil, and the other end of the watertight cables is provided with a watertight connector.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] The transmitting coil module is controlled by connecting it to the corresponding control circuit module through a watertight connector.

[0013] Furthermore, the concave surface of the receiving magnetic core support is provided with two reserved holes for leading out the corresponding Litz coil start end and end Litz wire respectively.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] The lead-out Litz wire is connected to the corresponding control circuit module, and the internal control circuit module is controlled through the transmitting coil module and the receiving coil module.

[0016] Furthermore, the concave surface of the receiving magnetic core support is provided with a through-hole assembly, which has a through hole corresponding to the reserved hole, and the Litz wire is led out and passed through the through hole corresponding to the through-hole assembly.

[0017] Compared with the prior art, the advantages of this utility model are:

[0018] The Litz wire is protected when it passes through the bulkhead by being threaded through the bulkhead assembly.

[0019] Furthermore, the concave surface of the transmitting magnetic core bracket and the convex surface of the receiving magnetic core bracket are provided with multiple magnetic core mounting slots distributed along the arc length direction and matching the corresponding ferrite magnetic cores, and the corresponding ferrite magnetic cores are nested in the magnetic core mounting slots.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] The magnetic core is positioned using the core mounting slot to prevent it from shaking during the potting process.

[0022] Furthermore, the concave surface of the transmitting magnetic core bracket and the convex surface of the receiving magnetic core bracket are both provided with potting cavities, and the magnetic core mounting slots are distributed at the bottom of the corresponding potting cavities. After the corresponding Litz coil is placed in the potting cavity, glue is poured to form a solid potting body.

[0023] Compared with the prior art, the advantages of this utility model are:

[0024] By setting up a potting cavity and filling it with glue, the use of molds can be reduced. Glue can be directly poured into the potting cavity, and then it is only necessary to make the outer surface of the potting body flush with the outer surface of the magnetic core support. This makes it easy to control the shape of the potting body and is convenient to operate. Combined with the potting encapsulation body, pressure resistance and water tightness can be achieved.

[0025] Furthermore, the side wall of the transmitting magnetic core bracket is provided with two reserved holes that penetrate into the transmitting potting cavity. Watertight cables that connect to the starting end and the ending end of the corresponding Litz coil are respectively inserted into the two reserved holes, and a watertight connector is provided at the other end of the watertight cable.

[0026] Compared with the prior art, the advantages of this utility model are:

[0027] After stripping the sheath of the watertight cable to expose the aramid fibers, embedding the aramid fibers into the glue during the potting process can increase the tensile strength and thus enhance the connection strength of the watertight cable.

[0028] Furthermore, the overall size of the transmitting coil module is larger than the overall size of the receiving coil module.

[0029] Compared with the prior art, the advantages of this utility model are:

[0030] The arc length of the transmitting coil module is greater than that of the receiving coil module, which ensures that the product has a certain offset tolerance and can still transmit electrical energy or signals after offset.

[0031] Furthermore, the Litz coil is fixed to the corresponding ferrite core with double-sided adhesive and / or instant adhesive before potting.

[0032] Compared with the prior art, the advantages of this utility model are:

[0033] Before applying the glue, fix the Litz coil with double-sided tape to ensure that the shape of the Litz coil conforms to the standard and maintains its shape. After the Litz coil is pre-fixed with double-sided tape, the fixation strength of the Litz coil can be strengthened by applying instant glue to prevent the Litz coil from shifting position during the glue application process.

[0034] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the external shape of the transmitting coil module in an embodiment of a pressure-resistant, watertight wireless power transmission magnetic coupling mechanism of this utility model;

[0036] Figure 2 for Figure 1 A schematic diagram of the decomposition process;

[0037] Figure 3 This is a schematic diagram of the external shape of the receiving coil module in an embodiment of a pressure-resistant, watertight wireless power transmission magnetic coupling mechanism of this utility model;

[0038] Figure 4 for Figure 3 A schematic diagram of its breakdown.

[0039] [Attached image labels]

[0040] 1- Transmitting coil module;

[0041] 11-Emitting magnetic core support;

[0042] 12-Emitting ferrite core;

[0043] 13 - Emitter Litz coil;

[0044] 14-Watertight connector;

[0045] 15 - Launch potting compound;

[0046] 16 - Launch core mounting slot;

[0047] 17-Emitting bump;

[0048] 18 - Launching glue chamber;

[0049] 19-Watertight cable;

[0050] 2- Receiver coil module;

[0051] 21-Receiver core support;

[0052] 22 - Receive ferrite core;

[0053] 23 - Receive Litz coil;

[0054] 24-Cavity-penetrating components;

[0055] 25 - Receive the potting encapsulated body;

[0056] 26 - Receiver core mounting slot;

[0057] 27-Receiver bump;

[0058] 28 - Receiving potting cavity. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0060] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0061] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0062] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0063] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0064] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0065] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0066] The following detailed description of the features and performance of a pressure-resistant, watertight wireless power transmission magnetic coupling mechanism of this application, in conjunction with embodiments, provides further insight into its characteristics and performance.

[0067] An embodiment of the pressure-resistant, watertight wireless power transmission magnetic coupling mechanism of this utility model is as follows: Figures 1 to 4 As shown, hereinafter referred to as the organization.

[0068] The mechanism includes a transmitting coil module 1 and a receiving coil module 2. The transmitting coil module 1 and the receiving coil module 2 have similar structures. Both the transmitting coil module 1 and the receiving coil module 2 include a magnetic core support, a ferrite core, a Litz coil, and a potting compound. Specifically, the transmitting coil module 1 includes a transmitting magnetic core support 11, a transmitting ferrite core 12, a transmitting Litz coil 13, and a transmitting potting compound 15. A watertight connector 14 for connecting to the transmitting Litz coil 13 is provided on the transmitting magnetic core support 11. The receiving coil module 2 includes a receiving magnetic core support 21, a receiving ferrite core 22, a receiving Litz coil 23, and a receiving potting compound 25. A through-cabin assembly 24 is provided on the receiving magnetic core support 21.

[0069] In this embodiment, the magnetic core support is manufactured by 3D printing. The material can be selected from resin, nylon, polyoxymethylene resin or polyurethane, etc., depending on the working environment requirements. The magnetic core support is an arc-shaped plate.

[0070] Both the concave surface of the transmitting core support 11 and the convex surface of the receiving core support 21 are provided with core mounting slots that match the size of the corresponding ferrite cores. These slots are used to place the ferrite cores and constrain their positions. The number of core mounting slots is determined by the winding range of the Litz coil and the shape of the ferrite core. In this embodiment, the ferrite core is a square bar core. The transmitting core support 11 has 29 transmitting core mounting slots 16 arranged along the arc length. Correspondingly, the transmitting coil module 1 has 29 transmitting ferrite cores 12, which are nested in the corresponding transmitting core mounting slots 16. The receiving core support 21 has 21 receiving core mounting slots 26 arranged along the arc length. Correspondingly, the receiving coil module 2 has 21 receiving ferrite cores 22, which are nested in the corresponding receiving core mounting slots 26. The bottom surfaces of the transmitting magnetic core mounting slot 16 and the receiving magnetic core mounting slot 26 are formed as an arc surface. Correspondingly, the transmitting ferrite magnetic core 12 and the receiving ferrite magnetic core 22 are arranged in an arc shape.

[0071] Ferrite cores are high-frequency magnetic materials used to increase the coupling of Litz coils and reduce stray magnetic field interference. Litz coils are made of Litz wire, which is composed of multiple strands of single-strand enameled wire twisted together in a helical structure. Using multiple strands of single-strand enameled wire to form Litz wire effectively reduces the effects of skin contact and proximity effects generated by high-frequency alternating current, thus reducing losses. In this embodiment, as... Figure 2 , Figure 4 As shown, both the transmitting Litz coil 13 and the receiving Litz coil 23 are made of Litz wire wound into multiple loop-shaped areas and filled with the designed winding range to form a wireless transmission coil. Both the transmitting Litz coil 13 and the receiving Litz coil 23 are bent into an arc shape.

[0072] The transmitting coil module 1 and the receiving coil module 2 are internally potted to form a potting compound. The potting compound uses DG-3S epoxy resin or other filler adhesives with high hardness after curing. DG-3S epoxy resin has good resistance to media, oil, water, acids and alkalis, and can be used for bonding, sealing and potting protection. After the internal potting compound of the transmitting coil module 1 and the receiving coil module 2 is applied, the entire assembly is potted using polyurethane material. This material can form a non-porous, dense, and high-strength structure during the curing process, improving the strength and pressure resistance of the potted object. The outer contours of the transmitting potted encapsulated body 15 and the receiving potted encapsulated body 25 formed after potting and encapsulation are similar to the outer contours of the corresponding transmitting magnetic core support 11 and the receiving magnetic core support 21.

[0073] In this embodiment, the concave surface of the transmitting magnetic core support 11 and the convex surface of the receiving magnetic core support 21 are respectively provided with corresponding transmitting protrusions 17 and receiving protrusions 27. The transmitting protrusions 17 and 27 are respectively provided with transmitting potting cavities 18 and 28. The arc-shaped openings at the top of the transmitting protrusions 17 and 27 allow the transmitting potting cavities 18 and 28 to communicate with the outside. The transmitting magnetic core mounting grooves 16 and 26 are located at the bottom of the corresponding transmitting potting cavities 18 and 28. The transmitting ferrite core 12 and the receiving ferrite core 21 are respectively located at the bottom of the transmitting potting cavities 18 and 28. After the ferrite core 22 is installed in the corresponding transmitting core mounting slot 16 and receiving core mounting slot 26, the transmitting Litz coil 13 and receiving Litz coil 23 can be arranged in the corresponding transmitting potting cavity 18 and receiving potting cavity 28. Then, glue can be filled into the transmitting potting cavity 18 and receiving potting cavity 28, so that the internal transmitting ferrite core 12, transmitting Litz coil 13 and transmitting core support 11 form a solid whole, and the receiving ferrite core 22, receiving Litz coil 23 and receiving core support 21 form a solid whole, improving the withstand voltage characteristics. The shapes of the potting cavities such as the transmitting potting cavity 18 and receiving potting cavity 28 are similar to the shapes of the corresponding transmitting core support 11 and receiving core support 21, all of which are arc-shaped.

[0074] When placing the transmitting ferrite core 12 and the receiving ferrite core 22 in their respective transmitting core mounting slots 16 and 26, in addition to directly nesting them into the slots, instant adhesive can also be used to fix them. When placing the transmitting Litz coil 13 and the receiving Litz coil 23 in their respective transmitting potting cavities 18 and 28, double-sided adhesive can be used to fix them within these cavities to prevent position changes during potting.

[0075] The transmitting magnetic core support 11 has two pre-drilled holes. In this embodiment, the pre-drilled holes are located on the side wall of the transmitting magnetic core support 11 and extend into the transmitting potting cavity 18. Watertight cables 19 are inserted into the pre-drilled holes. The two watertight cables 19 are electrically connected to the starting end and the ending end of the transmitting Litz coil 13, respectively. The wires in the watertight cables 19 are soldered to the wires in the Litz coil, and the soldering position is protected by heat shrink tubing. During potting, the pre-drilled holes are filled with glue, and the aramid fibers of the watertight cables are embedded in the glue for a length ≥5mm.

[0076] The receiving magnetic core support 21 has pre-drilled holes on its concave surface. The starting and ending ends of the receiving Litz coil 23 extend at least 200mm beyond the pre-drilled holes for electrical connection with the control circuit module. In this embodiment, a through-hole assembly 24 is provided on the concave surface of the receiving magnetic core support 21. The through-hole assembly 24 has two through holes corresponding to the pre-drilled holes. The starting and ending ends of the receiving Litz coil 23 pass through the corresponding pre-drilled holes and are then inserted into the through holes of the through-hole assembly 24, preventing short circuits when the starting and ending ends pass through the through-hole. During potting, the pre-drilled holes are filled with adhesive.

[0077] The external dimensions of the transmitting coil module 1 and the receiving coil module 2 in this invention are not limited, but are determined by factors such as the power, transmission efficiency, and transmission distance of the energy transmitted by the coils. The overall size of the transmitting coil module 1 is larger than that of the receiving coil module 2. That is, after the transmitting coil module 1 and the receiving coil module 2 are matched, the projection of the receiving coil module 2 onto the transmitting coil module 1 falls within the range of the transmitting coil module 1. The arc length of the transmitting coil module 1 is greater than the arc length of the receiving coil module 2, which ensures that the product has a certain degree of offset tolerance, and can still transmit electrical energy or signals after offset. The overall size of the receiving coil module 2 is smaller to meet the size constraints of the receiving equipment.

[0078] This invention is conformally mounted to the equipment it is mounted on, such as an underwater UUV (Unmanned Underwater Vehicle) or other cylindrical underwater devices. The transmitting coil module 1 is connected to the control circuit module via a watertight cable and a watertight connector 14. The receiving coil module 2, mounted on the outer surface of the equipment, is connected to the internal control circuit module via a penetration assembly 24. The penetration assembly 24 uses an O-ring to achieve underwater sealing between the inside and outside of the mounted equipment. Electrical energy is wirelessly transmitted between the transmitting coil module 1 and the receiving coil module 2 of this invention.

[0079] In the magnetic coupling mechanism of this utility model, power coils and data coils can be set on the same set of magnetic coupling mechanisms. At least two sets of coils are arranged on the corresponding magnetic core supports. Power and data transmission are realized through the same set of magnetic coupling mechanisms. That is, power coils and data coils are set in the transmitting coil module and corresponding power coils and data coils are set in the receiving coil module. Power coils and data coils can be Litz coils or other wireless transmission coils.

[0080] The manufacturing process of this utility model is described in detail below: During production, the ferrite core is first installed into the corresponding core mounting slot of the 3D-printed core support, and then fixed in place with instant adhesive. After complete fixation, a layer of double-sided adhesive is applied to the surface of the ferrite core. A Litz coil is then wound onto the double-sided adhesive according to the established coil winding scheme, ensuring the coil remains flat throughout the winding process. After winding, parameters such as the coil's self-inductance and internal resistance are tested, and the mutual inductance between the transmitting and receiving coils is calculated.

[0081] For transmitting coil module 1, the ends of the watertight cable 19 need to be wrapped with an appropriate amount of insulating self-adhesive tape, and then inserted into the reserved holes of the magnetic core bracket. The wires in the watertight cable 19 are soldered to the starting and ending ends of the Litz wire according to the defined wiring relationship. After soldering, the solder joints are protected with heat shrink tubing. For receiving coil module 2, when the coil is wound, the starting and ending ends of the Litz wire extend at least 200mm out of the reserved holes of the receiving magnetic core bracket 21 to ensure sufficient length for connection with the control circuit module. Before the Litz wire extends out of the reserved holes, the through-cabin assembly 24 has been installed on the receiving magnetic core bracket 21. The Litz wire passes through the through-cabin assembly 24 as it extends out of the reserved holes, and then connects to the control circuit module inside the equipment.

[0082] After the coil is wound, it is temporarily reinforced and fixed with instant adhesive to prevent movement during glue filling. Then, glue (DG-3S epoxy or other suitable adhesives are applied above the coil) until it is flush with the arc surface of the corresponding magnetic core support. The glue should fill the cavity completely and be free of air bubbles. When applying glue to the transmitting coil module 1, the aramid fibers of the watertight cable should be embedded ≥5mm into the glue to increase tensile strength. For the receiving coil module 2, the glue should be applied until it is flush with the arc surface of the corresponding magnetic core support. During glue filling, the pre-drilled holes must be completely filled.

[0083] After potting, a specially designed potting mold is used to pot the transmitting coil module 1 and the receiving coil module 2 with polyurethane. The thickness of the potting encapsulation is not less than 5mm, the temperature is not higher than 60℃, and the surface of the potting encapsulation should be flat, without cracks or shrinkage pits.

[0084] Through internal filling and potting with adhesive and external polyurethane potting, the product can achieve underwater pressure resistance and sealing functions. The effect of internal potting and the overall potting quality will affect the underwater pressure resistance and sealing performance of the product. Therefore, the potting quality should be ensured during potting and sealing. This utility model enables the design of a conformal magnetic coupling mechanism in an underwater high-power wireless power transmission system.

[0085] The concave surface of the transmitting coil module 1 is matched with the convex surface of the receiving coil module 2. The two can be attached together or spaced a certain distance apart, thereby realizing the transmission of electrical energy or data signals.

[0086] In other embodiments of this utility model, the overall size of the receiving coil module 2 may be set to be larger than the overall size of the transmitting coil module 1.

[0087] In other embodiments of this utility model, the transmitting protrusion 17 and the receiving protrusion 27 can be omitted. Instead, core mounting grooves for mounting ferrite cores can be directly provided on the concave surface of the transmitting core support 11 and the convex surface of the receiving core support 21. Then, the corresponding Litz coil is fixed on the ferrite core, followed by potting. A mold can be used during potting to ensure a seal between the Litz coil and the ferrite core after potting, while also ensuring that the outer surface after potting is an arc surface matching the corresponding core support. Alternatively, the thickness of the transmitting core support 11 and the receiving core support 21 can be increased, and a transmitting potting cavity 18 and a receiving potting cavity 28 can be respectively formed on the concave surface of the transmitting core support 11 and the convex surface of the receiving core support 21.

[0088] In other embodiments of this utility model, the concave surface of the transmitting magnetic core bracket 11 and the convex surface of the receiving magnetic core bracket 21 may not be provided with magnetic core mounting grooves. The ferrite core can be directly fixed on the concave surface of the corresponding transmitting magnetic core bracket 11 and the convex surface of the receiving magnetic core bracket 21 using instant adhesive, and then the adhesive can be poured using a mold.

[0089] In other embodiments of this utility model, the reserved holes on the transmitting magnetic core bracket 11 and the receiving magnetic core bracket 21 can be used to directly lead out the corresponding Litz wires and connect them to the corresponding control circuit modules.

[0090] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant, watertight wireless power transmission magnetic coupling mechanism, comprising a transmitting coil module (1) and a receiving coil module (2), characterized in that: The transmitting coil module (1) includes a transmitting magnetic core support (11), and the receiving coil module (2) includes a receiving magnetic core support (21). Both the transmitting magnetic core support (11) and the receiving magnetic core support (21) are arc-shaped plates. The concave surface of the transmitting magnetic core support (11) and the convex surface of the receiving magnetic core support (21) are provided with a group of ferrite cores arranged along the arc length direction. Each group of ferrite cores has a Litz coil that matches the ferrite core on its outer surface. The transmitting magnetic core support (11) and its corresponding ferrite cores and Litz coils are wrapped with a transmitting potting encapsulation body (15). The receiving magnetic core support (21) and its corresponding ferrite cores and Litz coils are wrapped with a receiving potting encapsulation body (25). The transmitting potting encapsulation body (15) and the receiving potting encapsulation body (25) are filled with potting materials formed by potting.

2. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that: The transmitting magnetic core support (11) is provided with two watertight cables (19) whose ends are respectively connected to the start end and end end of the corresponding Litz coil, and a watertight connector (14) is provided at the other end of the watertight cable (19).

3. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that: The concave surface of the receiving magnetic core support (21) is provided with two reserved holes for leading out the corresponding Litz coil start end and end Litz wire respectively.

4. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 3, characterized in that: The concave surface of the receiving magnetic core support (21) is provided with a through-hole assembly (24), and the through-hole assembly (24) is provided with a through hole corresponding to the reserved hole. The Litz wire is led out and passed through the through hole corresponding to the through-hole assembly (24).

5. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that: The concave surface of the transmitting magnetic core bracket (11) and the convex surface of the receiving magnetic core bracket (21) are provided with multiple magnetic core mounting slots distributed along the arc length direction and matched with the corresponding ferrite magnetic cores. The corresponding ferrite magnetic cores are nested in the magnetic core mounting slots.

6. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 5, characterized in that: The concave surface of the transmitting magnetic core bracket (11) and the convex surface of the receiving magnetic core bracket (21) are provided with potting cavities. The magnetic core mounting slots are distributed at the bottom of the corresponding potting cavities. After the corresponding Litz coil is set in the potting cavity, glue is poured to form a solid potting body.

7. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 6, characterized in that: The side wall of the transmitting magnetic core bracket (11) is provided with two reserved holes that penetrate into the transmitting potting cavity (18). Watertight cables (19) connected to the starting end and the end end of the corresponding Litz coil are respectively inserted into the two reserved holes. The aramid filaments of the watertight cables (19) are embedded in the potting body. A watertight connector (14) is provided at the other end of the watertight cables (19).

8. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that: The overall size of the transmitting coil module (1) is larger than the overall size of the receiving coil module (2).

9. The pressure-resistant, watertight, wireless power transmission magnetic coupling mechanism according to claim 1, characterized in that: Before being potted, the Litz coil is pre-fixed to the corresponding ferrite core using double-sided adhesive and / or instant adhesive.

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