A double-sided coupling relay module for a misalignment-resistant wireless power transmission system

Abstract

The application discloses a double-sided coupling relay module for an anti-offset wireless power transmission system, which comprises a ferrite plate and a butterfly-shaped coil, the butterfly-shaped coil is wound by a same continuous wire, and comprises a left sub-coil, a middle spiral compensation winding and a right sub-coil, the left and right sub-coils are arranged on the two sides of the middle spiral compensation winding respectively; the ferrite plate separates the butterfly-shaped coil into a first coupling surface and a second coupling surface, on the first coupling surface, the current directions of the left sub-coil, the middle spiral compensation winding and the right sub-coil are same and the paths are concentrated in the middle area of the ferrite plate; on the second coupling surface, the current directions of the left and right sub-coils are same and the paths are symmetrically distributed on the two sides of the ferrite plate, and the current direction of the middle spiral compensation winding is same as that of the edge winding of the left and right sub-coils. The anti-offset capability of the system is improved by optimizing the relay module design, and the transmission performance can be kept robust in a dynamic charging scene without a complex control circuit.

Description

Technical Field

[0001] This invention relates to the field of wireless power transmission technology, and more specifically to a dual-coupling relay module for offset-resistant wireless power transmission systems. Background Technology

[0002] Wireless power transfer (WPT), as a contactless power transfer technology, has been widely used in electric vehicles, implantable medical devices, and consumer electronics. Among these, magnetically coupled resonant WPT, which can achieve efficient power transfer over medium to long distances, is currently a hot topic in research and application. However, magnetically coupled resonant WPT relies on magnetic field coupling between coils to achieve energy transfer, and spatial misalignment between coils directly leads to fluctuations in the coupling coefficient, severely affecting the stability of transmission performance.

[0003] There are two main anti-offset solutions: one is to add a power mechanical device to adjust the position and orientation of the transmitting coil and the relay coil, and the other is to add a control element to adjust the circuit parameters. Both of these require additional control programs and real-time adjustments to system components to cope with frequent offsets at the receiving end, which are costly and involve complex hardware configurations.

[0004] Meanwhile, existing WPT systems mostly adopt a deployment method where the transmitting and receiving coils are parallel and coaxially aligned. The power supply can only be placed on both sides of the receiving coil axis, resulting in low spatial freedom of deployment and making it unsuitable for scenarios such as charging vertical devices where the receiving and transmitting ends are arranged perpendicularly. In addition, existing coils can be divided into E-type coils (such as planar spiral coils) and C-type coils (such as DD-type coils) according to their magnetic circuit characteristics. However, these two types of coils produce different types of magnetic field distributions. Existing systems cannot simultaneously leverage the advantages of good rotational freedom and compact structure of planar spiral coils and the relatively uniform magnetic field and strong anti-deviation capability of DD-type coils in the same deployment.

[0005] Therefore, there is an urgent need to construct an anti-offset relay module that can efficiently utilize the two types of coils in synergy. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a dual-coupling relay module for offset-resistant wireless power transmission systems, aiming to solve at least some of the aforementioned problems.

[0007] In a first aspect, the present invention provides a dual-coupling repeater module for a drift-resistant wireless power transmission system, comprising: a ferrite plate and a butterfly coil disposed on the ferrite plate. The butterfly coil is wound from the same continuous conductor and includes a left sub-coil, a middle spiral compensation winding and a right sub-coil. The left sub-coil and the right sub-coil are respectively arranged on both sides of the lateral side of the middle spiral compensation winding. The ferrite plate divides the butterfly coil into a first coupling surface and a second coupling surface. The wires of the butterfly coil are connected across the first coupling surface and the second coupling surface. The first coupling surface is the transmitting side coupling surface, and the second coupling surface is the receiving side coupling surface. At the first coupling surface, the current directions of the left sub-coil, the middle spiral compensation winding, and the right sub-coil are the same and the paths are concentrated in the middle region of the ferrite plate. The first coupling surface generates horizontal magnetic lines of force that are concentrated in the center of the ferrite plate and extend far away, which are used to achieve long-distance coupling with the transmitting coil. On the second coupling surface, the current directions of the left and right sub-coils are the same and their paths are symmetrically distributed on both sides of the ferrite plate. The current direction of the central spiral compensation winding is the same as the current direction of the conductors of the left and right sub-coils on the second coupling surface. The second coupling surface generates flat and symmetrical horizontal magnetic lines of force to maintain the coupling coefficient stable when the receiving coil undergoes lateral displacement.

[0008] Furthermore, the left sub-coil and the right sub-coil are single D-type sub-coils, and the central spiral compensation winding is a double-sided spiral coil.

[0009] Furthermore, the wires of the left sub-coil and the right sub-coil are bent along the edge of the ferrite plate to achieve a bridging between the first coupling surface and the second coupling surface; the wires of the central spiral compensation winding are bent in the thickness direction of the ferrite plate to achieve a bridging between the first coupling surface and the second coupling surface.

[0010] Furthermore, the lateral edges of the butterfly coil do not extend beyond the lateral boundary of the ferrite plate.

[0011] On the other hand, the present invention provides a coupling structure deployment method based on the above-mentioned double-sided coupled relay module, which is applied to a wireless power transmission system, the system including a transmitting coil, a receiving coil and the above-mentioned relay module located between the two; The deployment method includes: The relay module is used as a relay coil; A C-type coil is used as the transmitting coil, and the transmitting coil is arranged parallel to one side of the first coupling surface of the relay coil. The first coupling surface and the C-type coil generate magnetic field coupling. An E-type coil is used as the receiving coil, which is vertically arranged on one side of the second coupling surface of the relay coil, so that the plane where the receiving coil is located is perpendicular to the plane where the transmitting coil is located, and the second coupling surface and the E-type coil generate magnetic field coupling.

[0012] Furthermore, the C-type coil is a coil that forms only a single magnetic reluctance path on the cross-section of the magnetic core, and the magnetic field it generates in the coupling air gap is parallel to the coil plane, including but not limited to DD-type coils and DDQ-type coils; The E-type coil is a coil that forms two magnetic reluctance paths on the cross-section of the magnetic core. The magnetic field it generates in the coupling air gap is perpendicular to the coil plane, including but not limited to circular planar spiral coils and rectangular planar spiral coils.

[0013] Furthermore, the transmitting coil and the relay module can be rotated along the central axis of the receiving coil while maintaining a stable coupling coefficient.

[0014] The beneficial effects of this invention are: 1. The optimized butterfly coil of this invention can generate a symmetrical horizontal magnetic field at the location of the receiving coil through the coupling surface (B-side) on the receiving side. When the receiving end is laterally offset within a certain range, the coupling coefficient between the receiving coil and the relay coil does not fluctuate with the change of offset. Therefore, the WPT system based on this relay module has strong anti-offset capability and high practicality and convenience. It can maintain robust transmission performance in dynamic charging scenarios without complex control circuits.

[0015] 2. The WPT system based on the coil proposed in this invention offers high flexibility in power supply deployment. Traditional systems can only place power supplies on both sides of the central axis of the receiving coil, while the system proposed in this invention can be deployed at any angle on the plane where the receiving coil is located. During this process, since the coupling coefficient between coils remains unchanged, the transmission performance of the system can remain stable.

[0016] 3. This invention achieves anti-deviation performance through physical coil structure design, without the need for additional complex control circuits or mechanical adjustment devices. Performance improvement can be achieved simply by optimizing the coil winding method and magnetic core structure. The structure is simple, easy to implement, and low in cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of the relay module; Figure 2 This is a schematic diagram of the front and back of the relay module; Figure 3 This is a magnified view of a portion of the relay module; Figure 4 Schematic diagram of relay module current Figure 5A schematic diagram of the magnetic field lines of a butterfly coil; Figure 6 A schematic diagram of the coupled structure deployment; Figure 7 The simulation curve of the coupling coefficient under lateral offset; Figure 8 The measured curve of the transmit-relay coupling coefficient; Figure 9 The measured curves show the anti-offset characteristics of the relay module. Figure 10 This is a schematic diagram illustrating the system deployment flexibility of the present invention; In the diagram: 1. Butterfly coil; 2. Ferrite plate; 3. Left sub-coil; 4. Right sub-coil; 5. Central spiral compensating winding. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. Throughout this specification, "left" and "right" refer to the left-right direction of side A (front).

[0021] like Figure 1-4 As shown, the present invention provides a double-sided coupled repeater module for a drift-resistant wireless power transmission system, comprising: a ferrite plate 2 and a butterfly coil 1 disposed on the ferrite plate 2. The butterfly coil 1 is wound from the same continuous conductor and includes a left sub-coil 3, a middle helical compensation winding 5, and a right sub-coil 4. The left sub-coil 3 and the right sub-coil 4 are respectively disposed on both sides of the middle helical compensation winding 5. The left sub-coil 3 and the right sub-coil 4 are single D-type sub-coils, and the middle helical compensation winding 5 is a double-sided helical coil. In this embodiment, the ferrite plate 2 divides the butterfly coil 1 into a first coupling surface and a second coupling surface. The conductors of the butterfly coil 1 span the first coupling surface and the second coupling surface. The first coupling surface is the transmitting side coupling surface (surface A), where the vertical conductors of the left sub-coil 3, the middle spiral compensation winding 5, and the right sub-coil 4 are all located on one side of the middle region of the ferrite. The second coupling surface is the receiving side coupling surface (surface B), where the vertical conductors of the left sub-coil 3 and the right sub-coil 4 are located on the outer region of the ferrite, and the middle spiral compensation winding 5 is located on one side of the middle region of the ferrite. The coils of the three units are connected across the first coupling surface and the second coupling surface (surface A and surface B). The top and bottom of the left sub-coil 3 and the right sub-coil 4 are connected by horizontal lines (the conductors are bent along the edge of the plate to connect the two sides A and B, connecting the vertical conductors of the left sub-coil 3 and the right sub-coil 4 respectively). The middle spiral compensation winding 5 relies entirely on a short arc in the thickness direction to cross the surface, only bypassing the plate thickness and not extending horizontally. The left and right edges of the butterfly coil 1 do not exceed the range of the ferrite plate 2. For ease of explanation, surface A will be defined as the transmitting-side coupling surface, and surface B as the receiving-side coupling surface.

[0022] like Figure 4 As shown, in this embodiment, the current distribution of the relay module differs between the first coupling surface and the second coupling surface (surface A and surface B). The currents on surface A are in the same direction and concentrated in one path: the currents of the left sub-coil 3, the central spiral compensation winding 5, and the right sub-coil 4 are in the same direction and concentrated in the central region of the ferrite plate 2. On surface B, the currents are in the same direction but symmetrically wound in three strands around the ferrite plate 2, symmetrically dividing the ferrite region: the currents of the left sub-coil 3 and the right sub-coil 4 are in the same direction and symmetrically distributed on both sides of the ferrite plate 2; the current direction of the central spiral compensation winding 5 is the same as the current direction of the edge windings of the left sub-coil 3 and the right sub-coil 4. The compensation winding added to the central region of the ferrite plate 2 has the same current direction as its corresponding coupling surface in both different coupling surfaces, which plays a beneficial role in efficiently enhancing the coupling strength between the coupling surface and adjacent coils.

[0023] like Figure 5As shown, the composite repeater module based on butterfly coil 1 and ferrite plate 2 has bi-directional magnetic flux properties. On the transmitting side coupling surface (surface A), all current paths contributing to the horizontal magnetic field are concentrated in the central region of ferrite plate 2, generating horizontal magnetic field lines that converge at the center of ferrite plate 2 and extend outwards. Simultaneously, this design effectively avoids the unfavorable situation where the current directions of the windings on both sides and the central winding of the coil are opposite, leading to magnetic field cancellation. On the receiving side coupling surface (surface B), two sets of windings with the same current are symmetrically distributed on both sides of ferrite plate 2, which is beneficial for achieving a symmetrical magnetic field distribution. The current direction of the central spiral compensation winding on surface A is the same as that of the central windings of the left sub-coil 3 and right sub-coil 4, thus further enhancing the coupling between the repeater coil and the transmitting coil. On surface B, the current direction of the winding is the same as that of the edge windings of the left sub-coil 3 and right sub-coil 4, which can improve the magnetic field strength in the central region, maintaining a stable coupling coefficient when the receiving coil experiences lateral offset, and achieving anti-offset power transmission.

[0024] This embodiment also provides a method for winding a butterfly coil 1, which consists of the following three stages: Phase 1: Winding of right sub-coil 4 After reserving the lead wire, begin winding from the starting point. The wire runs vertically along surface A to the top edge of ferrite plate 2, then flips over to surface B via the top horizontal cross-section. On surface B, it runs vertically to the bottom edge, then flips back to surface A via the bottom horizontal cross-section, completing the first turn. Each subsequent turn extends outwards, closely following the previous turn. During winding, the wire is horizontally bent at the top and bottom edges of ferrite plate 2 to bridge surfaces A and B. After each turn, the wire shifts one turn from its starting position on surface A towards the center of ferrite plate 2. After winding the preset number of turns, the wire naturally transitions to the starting point of the central spiral compensation winding 5.

[0025] Phase 2: Winding of the central spiral compensation winding 5 The starting point of the central spiral compensating winding 5 is immediately adjacent to the end point of the right sub-coil 4. The wire runs vertically upward from surface A to the top edge of the ferrite plate 2, then flips over along the thickness direction of the ferrite plate 2 to surface B. On surface B, the wire runs vertically downward to the bottom edge, then flips over again along the thickness direction to cross back onto surface A, completing the first turn. Thereafter, each turn is moved laterally adjacent to the previous turn, continuing the spiral winding. During this stage, the wire only bends along the thickness direction at the top and bottom edges of the ferrite plate 2 to bridge the gap between surfaces A and B, without any horizontal extension along the plate surface. After winding the preset number of turns, the wire naturally transitions to the starting point of the left sub-coil 3.

[0026] Phase 3: Winding of left sub-coil 3 The left sub-coil 3 is wound turn by turn from the outermost turn inwards. The wire starts at the winding point and runs vertically along surface A to the top edge of ferrite plate 2. It then flips over to surface B via the top horizontal cross-section, runs vertically along surface B to the bottom edge, and flips back to surface A via the bottom horizontal cross-section, completing the first turn (outermost turn). Each subsequent turn is then wound inwards, closely following the previous turn. During the winding process, the wire is horizontally bent at the top and bottom edges of ferrite plate 2 to bridge surfaces A and B. After the preset number of turns is completed, the tail end of the wire is fixed and led out from the edge of ferrite plate 2.

[0027] Using the above winding method, on the first coupling surface (surface A), the conductor paths of the left sub-coil 3, the middle spiral compensating winding 5, and the right sub-coil 4 are concentrated in the middle region of the ferrite plate 2, and the current directions are the same. On the second coupling surface (surface B), the conductor paths of the left sub-coil 3 and the right sub-coil 4 are symmetrically distributed on both sides of the ferrite plate 2, and the conductor path of the middle spiral compensating winding 5 is located in the middle region, with the current directions of the three units being the same. All cross-face bends are equipped with arc-shaped transition structures, which can accommodate rigid conductors and flexible conductors such as Litz wire. It should be noted that the above winding sequence can also be adjusted to "left sub-coil 3—middle spiral compensating winding 5—right sub-coil 4"; the winding starting point is not limited to the above position; different gaps can be left between each turn.

[0028] like Figure 6 As shown, this embodiment provides a coupling structure deployment method based on the above-mentioned double-sided coupled relay module, applied to a wireless power transmission system. The system includes a transmitting coil, a receiving coil, and the above-mentioned relay module located between them. The deployment method includes: using the relay module as a relay coil to achieve coupling between the transmitting and receiving coils of the WPT system; using a C-type coil as the transmitting coil, the transmitting coil being arranged parallel to one side of the first coupling surface of the relay coil, which can be well coupled with the horizontal magnetic lines of force generated by the transmitting side coupling surface (A surface) of the transmitting coil; using an E-type coil as the receiving coil, the receiving coil being arranged vertically to one side of the second coupling surface of the relay coil, so that the plane where the receiving coil is located is perpendicular to the plane where the transmitting coil is located, which can be well coupled with the horizontal magnetic lines of force generated by the receiving side coupling surface (B surface) of the receiving coil.

[0029] In this invention, the C-type coil is a coil that forms only a single magnetic reluctance path on the cross-section of the magnetic core, and the magnetic field it generates in the coupling air gap is parallel to the coil plane, such as a DD-type coil or a DDQ-type coil; the E-type coil is a coil that forms two magnetic reluctance paths on the cross-section of the magnetic core, and the magnetic field it generates in the coupling air gap is perpendicular to the coil plane, such as a circular planar spiral coil or a rectangular planar spiral coil.

[0030] In this embodiment, thanks to the design of the unidirectional current paths concentrated and parallel in the middle of the ferrite core, the relay module can achieve long-distance magnetic field coupling with the C-type transmitting coil. On the receiving side coupling surface, due to the combined effect of the symmetrically distributed unidirectional current windings on both sides of the ferrite core and the compensation winding in the middle, the magnetic field lines on this coupling surface are relatively flat and smooth, which is beneficial for achieving a coupling coefficient curve that is insensitive to lateral deviation within a certain range by exciting a symmetrical magnetic field. Figure 7 As shown, when the transmission distance changes, its robust range against lateral offset will also change accordingly. In practical applications, the length of the butterfly coil 1 and the number of compensation windings can be increased according to the specific situation, thereby achieving the goal of expanding the system's robust range against lateral offset.

[0031] To verify the practical application characteristics of the technical method proposed in this invention, specific implementation examples are provided as support. Litz wire with 400 strands and a copper core diameter of 0.05mm is selected as the material for winding the coil, with a wire diameter of 1.4mm. The transmitting coil of the WPT system coupling structure is a DD-type coil (C-type), with the long and short sides of the inner hole of a single D-type winding being 110mm and 55mm respectively. The receiving coil is a planar helical coil (E-type) with rotational freedom, suitable for various charging scenarios. The relay module of this invention can couple the above two different types of coils into the same system. PC95 series manganese-zinc ferrite with an initial permeability of 3300 is selected as the substrate. The ferrite board 2 used in the module is formed by splicing two mass-produced 100mm×100mm×5mm pieces (ferrite board 2 can also be a single piece). According to the coil winding method proposed in this invention, three compensating windings are added to the center of the butterfly coil 1. The wound coil is shaped by a rectangular acrylic plate and bonded to the ferrite plate 2 with double-sided adhesive. To simulate the charging scenario of a vertical device, this embodiment constructs a base-type coupling structure test platform based on an acrylic U-shaped plate. The planar spiral receiving coil is vertically placed on the upper platform of the repeater module through a slot. The receiving coil can move smoothly along the long side of the platform, thus corresponding to the lateral offset condition commonly seen in actual dynamic charging scenarios. Simultaneously, to effectively test the characteristics of the coupling structure at different transmission distances, acrylic pads of different specifications are selected to control the vertical distance between the coils. The curves showing the change in the coupling coefficient between the transmitting coil and the repeater coil with axial offset are as follows: Figure 8 As shown. (Through) Figure 8 It can be observed that the two coils can maintain a certain coupling coefficient at a relatively long distance. As the axial offset distance increases, the coupling coefficient gradually decreases while the attenuation rate is relatively slow. The transmitting coil and the transmitting side coupling surface of the relay module can achieve effective coupling.

[0032] Next, the robustness of the relay module's receiving-side coupling surface to lateral offset was tested by translating the receiving coil. Figure 9The influence of lateral offset on the system coupling coefficient is described when the axial distance from the centroid of the receiving coil to the coupling surface on the receiving side of the repeater module is 85 mm, 95 mm, and 105 mm, respectively. Figure 9 As shown, the experimental data and Figure 7 The simulation data describes similar characteristics, indicating an optimal axial distance between the receiving coil and butterfly coil 1 that enables a wide robust region against offset, effectively validating the simulation analysis results. The proposed repeater module maintains stable coupling strength in lateral offset scenarios, thereby enabling the WPT system to maintain a stable coupling coefficient in dynamic charging scenarios within a 100mm range, achieving robust power transmission. The total transmission distance can be increased by increasing the number of turns of the compensating winding in butterfly coil 1, or by rationally utilizing the concentrated winding of the transmitting-side coupling surface, depending on the actual application requirements.

[0033] like Figure 10 As shown, in this embodiment, the C-type coil and the E-type coil are efficiently coupled to the same system through the coil proposed in this invention. The transmitting-side coupling surface (A-side) of the butterfly coil 1 has a strong magnetic field and long-distance coupling characteristics with the C-type coil, while the coupling between the receiving-side coupling mode (B-side) and the E-type coil has the advantages of wide range and anti-offset. This superior performance allows it to be flexibly adapted to various application scenarios as a component in a multi-relay system. The power supply end can be deployed by rotating 360 degrees along the central axis of the receiving end. During this process, since the coupling coefficient between the coils remains unchanged, the transmission performance of the system can remain stable, greatly improving deployment flexibility.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A two-sided coupled repeater module for a migration-resistant wireless power transfer system, characterized in that, It includes a ferrite plate and a butterfly coil disposed on the ferrite plate. The butterfly coil is wound from the same continuous conductor and includes a left sub-coil, a middle spiral compensation winding and a right sub-coil. The left sub-coil and the right sub-coil are respectively arranged on both sides of the lateral side of the middle spiral compensation winding. The ferrite plate divides the butterfly coil into a first coupling surface and a second coupling surface. The wires of the butterfly coil are connected across the first coupling surface and the second coupling surface. The first coupling surface is the transmitting side coupling surface, and the second coupling surface is the receiving side coupling surface. At the first coupling surface, the current directions of the left sub-coil, the middle spiral compensation winding, and the right sub-coil are the same and the paths are concentrated in the middle region of the ferrite plate. The first coupling surface generates horizontal magnetic lines of force that are concentrated in the center of the ferrite plate and extend far away, which are used to achieve long-distance coupling with the transmitting coil. On the second coupling surface, the current directions of the left and right sub-coils are the same and their paths are symmetrically distributed on both sides of the ferrite plate. The current direction of the central spiral compensation winding is the same as the current direction of the conductors of the left and right sub-coils on the second coupling surface. The second coupling surface generates flat and symmetrical horizontal magnetic lines of force to maintain the coupling coefficient stable when the receiving coil undergoes lateral displacement.

2. The double-sided coupled relay module according to claim 1, characterized in that, The left sub-coil and the right sub-coil are single D-type sub-coils, and the central spiral compensation winding is a double-sided spiral coil.

3. The double-sided coupled relay module according to claim 1, characterized in that, The wires of the left sub-coil and the right sub-coil are bent along the surface of the ferrite plate at the edge of the plate to achieve a bridging between the first coupling surface and the second coupling surface; the wires of the central spiral compensation winding are bent in the thickness direction of the ferrite plate to achieve a bridging between the first coupling surface and the second coupling surface.

4. The double-sided coupled relay module according to claim 1, characterized in that, The lateral edges of the butterfly coil do not extend beyond the lateral boundary of the ferrite plate.

5. A method for deploying a coupling structure based on the double-sided coupled relay module of claim 1, characterized in that, Applied to a wireless power transmission system, the system comprising a transmitting coil, a receiving coil, and a relay module as described in any one of claims 1-4 located between the two; The deployment method includes: The relay module is used as a relay coil; A C-type coil is used as the transmitting coil, and the transmitting coil is arranged parallel to one side of the first coupling surface of the relay coil. The first coupling surface and the C-type coil generate magnetic field coupling. An E-type coil is used as the receiving coil, which is vertically arranged on one side of the second coupling surface of the relay coil, so that the plane where the receiving coil is located is perpendicular to the plane where the transmitting coil is located, and the second coupling surface and the E-type coil generate magnetic field coupling.

6. The method for deploying the coupling structure of the double-sided coupled relay module according to claim 5, characterized in that, The C-type coil is a coil that forms only a single magnetic reluctance path on the cross-section of the magnetic core. The magnetic field it generates in the coupling air gap is parallel to the coil plane, including but not limited to DD-type coils and DDQ-type coils. The E-type coil is a coil that forms two magnetic reluctance paths on the cross-section of the magnetic core. The magnetic field it generates in the coupling air gap is perpendicular to the coil plane, including but not limited to circular planar spiral coils and rectangular planar spiral coils.

7. The method for deploying the coupling structure of the double-sided coupled relay module according to claim 5, characterized in that, The transmitting coil and relay module can be rotated along the central axis of the receiving coil while maintaining a stable coupling coefficient.

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