Energy-gathering wireless charging primary coil structure and coil device based on parabolic reflection

Abstract

The present invention provides a primary coil structure and coil device for energy-gathering wireless charging based on parabolic reflection. The parabolic reflector can reflect and converge the electromagnetic waves generated by the primary coil, is deformable, and has its edges fixed to the coil frame, with the middle portion connected to the bracket via a reflector control assembly. The reflector control assembly controls the reflector to change its shape to adjust the focus of the parabola, and is connected between the bracket and the parabolic reflector. The coil frame on which multiple primary coils are arranged is connected to the bracket. In the present invention, the electromagnetic waves generated by the primary coil are reflected by the reflector and converged to the maximum at the position of the secondary coil, achieving the effect of energy-gathering charging, thereby improving the charging efficiency and transmission distance of wireless charging, so that efficient wireless power transmission can be achieved at medium and long distances. In addition, the reflector control assembly can change the shape of the parabolic reflector, thereby adjusting the focus of the parabola, so that it can be applied to wireless power transmission at different distances.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless charging coil structures, and in particular relates to an energy-gathering wireless charging primary coil structure based on parabolic reflection and an energy-gathering wireless charging coil device including the primary coil structure. Background Art

[0002] With the development of wireless charging technology, the traditional near-field coupling method between a single primary coil and a secondary coil faces certain limitations in terms of charging efficiency and transmission distance. In particular, in air, the energy of electromagnetic waves is significantly attenuated, resulting in a significant decrease in the energy received by the secondary coil as the transmission distance increases, affecting charging efficiency. Therefore, how to effectively gather the electromagnetic waves generated by multiple primary coils at medium and long distances to improve the reception efficiency of the secondary coil has become a key research direction in wireless charging technology.

[0003] Existing wireless charging technologies focus on improving transmission efficiency by optimizing the design of primary coils or enhancing magnetic field coupling. However, these solutions often introduce electromagnetic wave scattering and interference when increasing the number of primary coils or the size of the coils, making efficient energy transmission difficult. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the medium and long-distance wireless charging coil structure is difficult to achieve effective power transmission, and to provide a parabolic reflection-based energy-gathering wireless charging primary coil structure and an energy-gathering wireless charging coil device including the primary coil structure. The present invention utilizes the principle of secondary parabola reflection to converge the electromagnetic waves generated by multiple primary coils and concentrate them in the receiving area of ​​the secondary coil. The present invention can not only significantly improve the efficiency and transmission distance of wireless charging, but also can change the focus adjustment of the secondary parabola through the internal mechanical structure to adapt to wireless power transmission at different distances, providing a new solution for medium and long-distance wireless charging technology.

[0005] To achieve the above objectives, the technical solutions provided by the present invention are:

[0006] One aspect of the present invention provides a parabolic reflection-based energy-gathering wireless charging primary coil structure, comprising a bracket, a parabolic reflector, a reflector control assembly, a coil frame, a plurality of primary coils, and an electromagnetic shielding layer attached to each primary coil;

[0007] The bracket is used to provide support for the primary coil structure;

[0008] The parabolic reflector is used to reflect and converge the electromagnetic waves generated by the primary coil. It is deformable, and its edges are fixed to the coil frame. The middle part is connected to the bracket through the reflector control assembly.

[0009] The reflector control assembly is used to control the parabola reflector to change its shape and adjust the focus of the parabola, and is connected between the bracket and the parabola reflector;

[0010] The coil frame is connected to the bracket, and multiple primary coils are arranged on the coil frame so that the parabolic reflector and the electromagnetic shielding layer are located on opposite sides of the primary coil, and the electromagnetic shielding layer is located between the primary coil and the corresponding secondary coil. The electromagnetic waves generated on one side of the primary coil are reflected by the parabolic reflector, pass through the middle of the primary coil and converge on the secondary coil. The electromagnetic shielding layer is used to prevent the electromagnetic field generated on the other side of the primary coil from interfering with the intersecting electromagnetic fields.

[0011] Furthermore, the primary coil is arranged in an annular manner around the axis of the coil frame into two layers, inner and outer, upper and lower, and the inner coil is closer to the parabolic reflector than the outer coil, and the coils in the two layers are staggered and arranged at equal intervals.

[0012] Furthermore, the bracket can translate along the axis of the coil frame so as to control the parabolic reflector to change its shape through the reflector control assembly.

[0013] Furthermore, the reflector control assembly includes multiple screw motor structures and multiple hydraulic push rod structures; each screw motor structure includes a motor body, a screw and a screw nut, the motor body is installed to the coil frame, and the screw nut is fixed to the bracket so that the axis of the screw of the screw motor is parallel to the axis of the coil frame; each hydraulic push rod structure includes a cylinder body and a piston, the cylinder body is hinged to the bracket, and the piston is hinged to the parabolic reflector.

[0014] Furthermore, two screw motor structures are symmetrically arranged about the axis of the coil frame, and four hydraulic push rod structures are equally spaced about the axis of the coil frame.

[0015] Furthermore, the primary coil structure also includes a guiding mechanism for providing guidance for the bracket, and the guiding mechanism includes a guide rail and a slider. The guide rail is fixed to the coil frame and parallel to the axis of the coil frame. The slider is connected to the bracket. When the bracket translates along the axis of the coil frame under the drive of the screw motor structure, the slider translates along the guide rail with the bracket.

[0016] Furthermore, two guide mechanisms are symmetrically arranged about the axis of the coil frame and are arranged at equal intervals of 90 degrees to the two screw motor structures. The guide mechanisms, screw motor structures and hydraulic push rod structures are staggered and arranged at equal intervals.

[0017] Another aspect of the present invention provides an energy-gathering wireless charging coil device, comprising the above-mentioned energy-gathering wireless charging primary coil structure based on parabolic reflection, and also comprising a secondary coil structure arranged on the equipment to be charged.

[0018] The advantages of the present invention are:

[0019] 1. The parabolic reflection-based energy-gathering wireless charging primary coil structure of the present invention is provided with a parabolic reflector to reflect the electromagnetic waves generated by multiple primary coils, so that the reflected electromagnetic waves converge on the receiving area of ​​the secondary coil, so that the reflected waves of each primary coil reach the maximum at the position of the secondary coil, thereby achieving the effect of energy-gathering charging, thereby significantly improving the charging efficiency and transmission distance of wireless charging, and realizing efficient wireless power transmission at medium and long distances. In addition, the reflector control component can be used to change the shape of the parabolic reflector, thereby adjusting the focus of the parabola, so that it can be suitable for wireless power transmission at different distances.

[0020] 2. The primary coils are arranged in two layers, one inside the other and one above the other, increasing the number of primary coils and improving charging power and efficiency. Furthermore, the control circuit allows for different numbers of primary coils to be connected, adjusting the charging power and adapting to different secondary coil sizes.

[0021] 3. Compared with the existing wireless charging coil device, the energy-concentrating wireless charging coil device of the present invention can significantly improve the charging efficiency and transmission distance of the wireless charging device because the primary coil structure can reflect the electromagnetic waves generated by the primary coil and concentrate them on the secondary coil, so that the device can achieve efficient wireless power transmission at medium and long distances. In addition, by adjusting the focus of the parabola, the device can also be used for wireless power transmission at different distances, and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or other features and advantages of the present invention will become more readily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and in which some features are exaggerated or minimized to show details of particular components.

[0023] Figure 1 is a schematic three-dimensional diagram of the energy-gathering wireless charging primary coil structure based on parabolic reflection of the present invention;

[0024] Figure 2 This is a working principle diagram of the parabolic reflection-based energy-gathering wireless charging primary coil structure of the present invention;

[0025] Figure 3 is a schematic three-dimensional diagram of the coil frame and the primary coil in the present invention;

[0026] Figure 4 is a plan view of the arrangement structure of the primary coil in the present invention;

[0027] Figure 5 This is a structural diagram of the connection between the bracket, the reflector control assembly and the guide mechanism in the present invention.

[0028] In the figure: 1- bracket; 2- parabolic reflector; 3- reflector control assembly, 31- screw motor structure, 311- motor body, 312- screw, 313- screw nut, 32- hydraulic push rod structure, 321- cylinder body, 322- piston, 323- contact block, 324- mounting seat; 4- coil frame; 5- primary coil, 51- inner coil, 52- outer coil; 6- electromagnetic shielding layer; 7- guide mechanism, 71- guide rail, 72- slider, 73- mounting block, 74- connecting plate; 100- equipment to be charged; 101- secondary coil. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration and is not intended to limit the present invention.

[0030] This invention provides a parabolic reflection-based energy-concentrating wireless charging primary coil structure and an energy-concentrating wireless charging coil device incorporating this primary coil structure. The primary coil structure can be connected to a wireless charging base station to interface with equipment requiring power replenishment. Wireless charging is achieved through magnetic field coupling between the primary coil and the equipment's secondary coil. To facilitate efficient power transmission over medium and long distances, this invention utilizes the principle of secondary parabolic reflection to converge the electromagnetic waves generated by multiple primary coils, concentrating them in the receiving area of ​​the secondary coil, thereby achieving energy-concentrating charging.

[0031] First, the energy-gathering wireless charging primary coil structure based on parabolic reflection provided by the present invention is described.

[0032] Overall reference Figure 1 and Figure 2 As an exemplary embodiment of the present invention, a parabolic reflection-based energy-concentrating wireless charging primary coil structure includes a bracket 1, a parabolic reflector 2, a reflector control assembly 3, a coil frame 4, multiple primary coils 5, and an electromagnetic shielding layer 6 attached to each primary coil 5. The bracket 1 is used to provide support for the primary coil structure, the parabolic reflector 2 is used to reflect and converge the electromagnetic waves generated by the primary coil 5, and is deformable, the reflector control assembly 3 is used to control the parabolic reflector 2 to change its shape and adjust the focus of the parabola, the coil frame 4 is used to install the primary coil 5, and the electromagnetic shielding layer 6 is used to prevent the electromagnetic field generated by the primary coil 5 from interfering with the intersecting electromagnetic field reflected by the parabolic reflector 2.

[0033] The parabolic reflector 2 is made of a deformable material and is installed with its concave surface facing the coil frame 4 and the primary coil 5. The concave surface is provided with a material layer that can reflect the electromagnetic waves generated by the coil. Figure 1The middle part is connected to the bracket 1 through the reflector control component 3, so that the shape can be adjusted under the action of the reflector control component 3 to change the focus of the parabola, which is suitable for wireless power transmission at different distances.

[0034] The coil frame 4 is roughly annular and coaxially connected to the bracket 1. The bracket 1 can be annular. The parabolic reflector 2 can be located between the bracket 1 and the coil frame 4. The reflector control component 3 is connected between the bracket 1 and the parabolic reflector 2.

[0035] Combine Figure 3 , multiple primary coils 5 are arranged on the coil frame 4, so that the parabolic reflector 2 and the electromagnetic shielding layer 6 are located on opposite sides of the primary coil 5, and the electromagnetic shielding layer 6 is located between the primary coil 5 and the corresponding secondary coil 101 on the equipment to be charged 100.

[0036] like Figure 4 As clearly shown, in a specific embodiment of the present invention, the primary coil 5 comprises an inner coil 51 and an outer coil 52, arranged in an annular arrangement around the axis of the coil frame 4 into two layers, one inside and one outside, and one above and one below. In the axial direction of the coil frame 4, the inner coil 51 is closer to the parabolic reflector 2 than the outer coil 52. The coils in the two layers are staggered and evenly spaced. Preferably, there are four inner coils 51 and four outer coils 52, respectively. To achieve a simple structure for securing the inner and outer coils, the coil frame 4 can be shaped like a square ring, with the outer coils 52 arranged at the four corners and the inner coils 51 arranged in the middle of each side. The middle of the frame is recessed downward, closer to the parabolic reflector 2 than the corners. This dual-layer arrangement of primary coils increases the number of primary coils, improving charging power and efficiency. Furthermore, the control circuit can be used to adjust the charging power by connecting different numbers of primary coils, making it suitable for secondary coils of different specifications.

[0037] With this structure, the electromagnetic waves generated on one side of the primary coil 5 are reflected by the parabolic reflector 2, pass through the middle of the primary coil 5, and converge in the receiving area of ​​the secondary coil 101. The electromagnetic shielding layer 6 can prevent the electromagnetic field generated on the other side of the primary coil 5 from interfering with the intersecting electromagnetic field. In this way, the reflected waves of each primary coil 5 reach the maximum at the position of the secondary coil, achieving the effect of energy-concentrated charging, thereby significantly improving the charging efficiency and transmission distance of wireless charging, so that efficient wireless power transmission can be achieved even at medium and long distances.

[0038] To facilitate the control of the shape change of the parabolic reflector 2, in some embodiments, the bracket 1 can translate along the axis of the coil frame 4 to jointly control the shape change of the parabolic reflector 2 with the reflector control assembly 3. Specifically, the bracket 1 translates along the axis of the coil frame 4, and the bracket 1 then drives the drive mechanism connected to the parabolic reflector 2 to act on the parabolic reflector 2 to change its shape.

[0039] Furthermore, the reflector control assembly 3 may include multiple screw motor structures 31 and multiple hydraulic push rod structures 32. The screw motor structure 31 is vertically connected between the bracket 1 and the coil frame 4, and is used to drive the bracket 1 to translate along the axis of the coil frame 4. The hydraulic push rod structure 32 is radially connected between the bracket 1 and the parabolic reflector 2 to generate a force on the middle part of the parabolic reflector 2 when the bracket 1 moves.

[0040] Combine Figure 5 Each lead screw motor structure 31 includes a motor body 311, a lead screw 312, and a lead screw nut 313. The motor body 311 is mounted to the coil frame 4. To this end, the coil frame 4 may be provided with a horizontally outwardly protruding portion, to which the motor body 311 is fixed. The lead screw 312 is located outside the parabolic reflector 2, and the axis of the lead screw 312 is parallel to the axis of the coil frame 4. The lead screw nut 313, which is mounted on the lead screw, is fixed to the bracket 1 and can be fixed by screw connection.

[0041] Each hydraulic push rod structure 32 comprises a cylinder 321 and a piston 322. Cylinder 321 is hinged to bracket 1, articulated via a mounting base 324 with a double-lug structure. Piston 322 is hinged to parabolic reflector 2. Piston 322 is also connected to the parabolic reflector via the double-lug structure and via a contact block 323, thereby increasing the contact surface with the reflector and facilitating shape adjustment. With this structure, when the focus of the parabola needs to be adjusted, the lead screw motor structure 31 is activated. The motor body 311 remains stationary, while the lead screw 312 rotates about its axis, driving the lead screw nut 313 to move parallel to the axis of the coil frame 4. This drives bracket 1, which is fixed to the lead screw nut 313, into translation, causing the cylinder 321, which is hinged to bracket 1, to rotate. Simultaneously, a hydraulic circuit (not shown) drives hydraulic oil into cylinder 321, driving piston 322 to extend and retract. The amount of piston extension and retraction can be precisely controlled by controlling the oil volume. As a result, the parabolic reflector 2 hinged to the piston 322 is subjected to a force and its shape changes.

[0042] In a preferred embodiment, two screw motor structures 31 are symmetrically arranged about the axis of the coil frame 4 , and four hydraulic push rod structures 32 are equally spaced about the axis of the coil frame 4 .

[0043] In order to improve the motion accuracy and stability of the bracket, the energy-gathering wireless charging primary coil structure of the present invention may also include a guide mechanism 7 for providing guidance for the bracket 1. The guide mechanism 7 includes a guide rail 71 and a slider 72. The guide rail 71 is fixedly connected to the coil frame 4 and is parallel to the axis of the coil frame 4. To ensure a stable connection, the guide rail 71 can pass through the through hole on the coil frame 4 and be connected to the two mounting blocks 73 on the coil frame 4 by screws. The two mounting blocks 73 are respectively located on both sides of the guide rail 71, as shown in FIG. Figure 1 and Figure 3 As shown in . The slider 72 is connected to the bracket 1. When the bracket 1 is driven by the screw motor structure 31 and moves along the axis of the coil frame 4, the slider 72 moves along the guide rail 71 with the bracket 1. The slider 72 is in the shape of a rectangular parallelepiped, and a slideway for accommodating the guide rail 71 and sliding inside the slideway is processed on one surface. To ensure the connection strength, the slider 72 can be connected to the connecting plate 74 protruding from the bracket 1. The screw can pass through the connecting plate 74 and through the slider 72, as shown in Figure 1 and Figure 5 As shown in .

[0044] Furthermore, two guide mechanisms 7 can be arranged symmetrically about the axis of the coil frame 4, and arranged at equal intervals of 90 degrees to the two screw motor structures 31. In addition, the two guide mechanisms 7, the two screw motor structures 31 and the four hydraulic push rod structures 32 can be arranged alternately and at equal intervals, that is, the angle between every two adjacent mechanisms is 45 degrees.

[0045] According to the present invention, a detection device can be provided to monitor the model and distance of the equipment to be charged. A control circuit can be used to calculate the position of the secondary coil in the equipment. By adjusting the lead screw motor structure and the hydraulic push rod structure, the shape and focus of the parabola can be controlled. This allows the reflected wave of the primary coil to be superimposed at the position of the equipment's secondary coil to reach a maximum, achieving the effect of a set of primary coils adapting to the secondary coils of equipment at different distances. After adjusting the shape of the parabola, the base station begins to emit high-frequency alternating current, transmitting electrical energy to the equipment through the divergent magnetic field coupling between the primary and secondary coils. After the energy transfer is completed, the equipment moves away, and the receiving end detaches from the primary coil structure. At the same time, the lead screw motor can be controlled to restore the shape of the parabola reflector. From then on, the primary coil structure completes its work and the base station enters standby mode.

[0046] Therefore, as described above, the parabolic reflection-based energy-gathering wireless charging primary coil structure of the present invention is provided with a parabolic reflector to reflect the electromagnetic waves generated by multiple primary coils, so that the reflected electromagnetic waves converge on the receiving area of ​​the secondary coil, so that the reflected waves of each primary coil reach the maximum at the secondary coil position, thereby achieving the energy-gathering charging effect, thereby significantly improving the charging efficiency and transmission distance of wireless charging, and realizing efficient wireless power transmission at medium and long distances. In addition, the reflector control component can be used to change the shape of the parabolic reflector, thereby adjusting the focus of the parabola, so that it can be suitable for wireless power transmission at different distances.

[0047] Next, the energy-gathering wireless charging coil device provided by the present invention is described.

[0048] As an exemplary embodiment of the present invention, the energy-concentrating wireless charging coil device includes the aforementioned parabolic reflection-based energy-concentrating wireless charging primary coil structure and a secondary coil structure disposed on the device to be charged. The secondary coil structure includes a secondary coil that interfaces with the primary coil in the primary coil structure to enable wireless power transmission. The relevant structure, advantages, and operating process of the coil device can be found in the description of the primary coil structure above and will not be repeated here.

[0049] Compared with existing wireless charging coil devices, the energy-concentrating wireless charging coil device of the present invention can significantly improve the charging efficiency and transmission distance of the device's wireless charging because the primary coil structure can reflect the electromagnetic waves generated by the primary coil and concentrate them on the secondary coil, allowing the device to achieve efficient wireless power transmission at medium and long distances. In addition, by adjusting the focus of the parabola, the device can also be used for wireless power transmission at different distances, and has strong applicability.

[0050] Finally, it should be noted that the features mentioned and / or illustrated in the above description of the exemplary embodiments of the present invention may be incorporated into one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for corresponding features in other implementations. The technical solutions obtained by such combination or substitution shall also be deemed to be included in the scope of protection of the present invention.

Claims

1. A parabolic reflection-based energy-gathering wireless charging primary coil structure, characterized by: The invention comprises a bracket, a parabolic reflector, a reflector control assembly, a coil frame, a plurality of primary coils and an electromagnetic shielding layer attached to each primary coil; The bracket is used to provide support for the primary coil structure; The parabolic reflector is used to reflect and converge the electromagnetic waves generated by the primary coil, is deformable, and has an edge fixed to the coil frame, and a middle portion connected to the bracket through the reflector control assembly; The reflector control assembly is used to control the parabolic reflector to change its shape and adjust the parabola focus, and is connected between the bracket and the parabolic reflector; the reflector control assembly includes a plurality of screw motor structures and a plurality of hydraulic push rod structures; The coil frame is connected to the bracket, and the bracket can translate along the axis of the coil frame to control the parabolic reflector to change its shape through the reflector control assembly; Multiple primary coils are arranged on the coil frame, and the primary coils are arranged in an inner and outer, upper and lower layers around the axis of the coil frame, and the inner coil is closer to the parabolic reflector than the outer coil, and the coils in the two layers are staggered and arranged at equal intervals; the primary coils are arranged so that the parabolic reflector and the electromagnetic shielding layer are located on opposite sides of the primary coil, and the electromagnetic shielding layer is located between the primary coil and the connected secondary coil; the electromagnetic waves generated on one side of the primary coil are reflected by the parabolic reflector, pass through the middle of the primary coil, and converge on the secondary coil, and the electromagnetic shielding layer is used to prevent the electromagnetic field generated on the other side of the primary coil from interfering with the intersecting electromagnetic field.

2. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 1, characterized in that: Each lead screw motor structure includes a motor body, a lead screw and a lead screw nut, wherein the motor body is mounted to the coil frame, and the lead screw nut is fixed to the bracket so that the axis of the lead screw of the lead screw motor is parallel to the axis of the coil frame; Each hydraulic push rod structure includes a cylinder and a piston, wherein the cylinder is hinged to the bracket, and the piston is hinged to the parabolic reflector.

3. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 2, characterized in that: Two screw motor structures are symmetrically arranged about the axis of the coil frame, and four hydraulic push rod structures are equally spaced about the axis of the coil frame.

4. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 3, characterized in that: It also includes a guiding mechanism for providing guidance for the bracket, the guiding mechanism includes a guide rail and a slider, the guide rail is fixed to the coil frame and is parallel to the axis of the coil frame, the slider is connected to the bracket, when the bracket is translated along the axis of the coil frame under the drive of the screw motor structure, the slider is translated along the guide rail with the bracket.

5. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 4, characterized in that: The guide mechanisms are symmetrically arranged with respect to the axis of the coil frame, and are arranged at equal intervals of 90 degrees with respect to the two screw motor structures. The guide mechanisms, the screw motor structures and the hydraulic push rod structures are staggered and arranged at equal intervals.

6. An energy-gathering wireless charging coil device, characterized in that: The invention comprises the parabolic reflection-based energy-concentrating wireless charging primary coil structure according to any one of claims 1 to 5, and further comprises a secondary coil structure arranged on the equipment to be charged.

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