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

Abstract

The invention provides an energy-gathering wireless charging primary coil structure based on parabolic reflection and a coil device. The parabolic reflector can reflect and converge electromagnetic waves generated by the primary coil and is deformable, the edge of the parabolic reflector is fixed to the coil frame, and the middle of the parabolic reflector is connected to the support through the reflector control assembly. The reflecting piece control assembly controls the reflecting piece to change the shape so as to adjust the focus of the paraboloid and is connected between the support and the paraboloid reflecting piece. A coil frame on which a plurality of primary coils are arranged is connected to the bracket. According to the wireless charging device, the electromagnetic waves generated by the primary coil are reflected by the reflecting part and are converged to the maximum at the position of the secondary coil, so that the energy-gathered charging effect is achieved, the charging efficiency and the transmission distance of wireless charging are improved, and efficient wireless electric energy transmission can also be achieved at middle and long distances; the reflector control assembly can change the shape of the parabolic reflector, thereby adjusting the focus of the paraboloid, and enabling the device to be suitable for 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. Especially in the air medium, the energy attenuation of electromagnetic waves is large, resulting in a significant decrease in the energy received by the secondary coil when the transmission distance increases, affecting the charging efficiency. Therefore, how to effectively gather the electromagnetic waves generated by multiple primary coils at medium and long distances to improve the receiving efficiency of the secondary coil has become an important research direction in the current field of wireless charging technology.

[0003] In this regard, existing wireless charging technologies mostly focus on improving transmission efficiency by optimizing the design of primary coils or enhancing the strength of magnetic field coupling. However, these solutions often introduce electromagnetic wave scattering and interference when increasing the number of primary coils or increasing the coil volume, making it difficult to achieve effective energy transmission. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the medium and long-distance wireless charging coil structure existing in the prior art is difficult to achieve effective transmission of electric energy, and provides 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. 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 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 purpose, the technical solution provided by the present invention is:

[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, is deformable, and has its edge fixed to the coil frame, and its middle is connected to the bracket through a 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 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. 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.

[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 support can translate along the axis of the coil frame 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, the guiding mechanism includes a guide rail and a slider, the guide rail is fixedly connected to the coil frame and is 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 at 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 energy-gathering charging effect, thereby significantly 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 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 coil is arranged in two layers, inside and outside, up and down, which can increase the number of primary coils and improve the charging power and efficiency. At the same time, different numbers of primary coils can be connected through the control loop to adjust the charging power, which is suitable for secondary coils of different specifications.

[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 easily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and some features are exaggerated or reduced to show details of specific components. In the accompanying drawings:

[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 It is a working principle diagram of the energy-gathering wireless charging primary coil structure based on parabolic reflection of the present invention;

[0025] Figure 3 is a schematic three-dimensional diagram of a coil frame and a 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 It 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] The present invention provides 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 primary coil structure can be connected to a wireless charging base station to dock with equipment that needs to be supplied with electric energy, and wireless charging is performed through magnetic field coupling between the primary coil and the secondary coil on the equipment. In order to adapt to effective power transmission at medium and long distances, the present invention uses the principle of secondary parabolic reflection to converge the electromagnetic waves generated by multiple primary coils, so that they are concentrated in the receiving area of ​​the secondary coil, thereby realizing energy-gathering 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 primary coil structure for energy-gathering wireless charging based on parabolic reflection includes a bracket 1, a parabolic reflector 2, a reflector control assembly 3, a coil frame 4, a plurality of 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 capable of reflecting 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] Combination Figure 3 A plurality of primary coils 5 are arranged on a 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 secondary coil 101 connected to 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 includes an inner coil 51 and an outer coil 52, which are arranged in an inner and outer, upper and lower layers around the axis of the coil frame 4, and 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, and the coils in the two layers are arranged at equal intervals. Preferably, there are four inner coils 51 and four outer coils 52, respectively. In order to fix the inner and outer coils with a simple structure, the coil frame 4 can be in a square ring shape, the outer coil 52 is arranged at four corners, the inner coil 51 is arranged in the middle of each side, and the middle of the frame is concave downward and closer to the parabolic reflector 2 than the corner. This double-layer arrangement structure of the primary coil can increase the number of primary coils and improve the charging power and efficiency. At the same time, different numbers of primary coils can be connected through the control circuit to adjust the charging power, which is 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-gathering charging, thereby significantly improving the charging efficiency and transmission distance of wireless charging, so that efficient wireless power transmission can be achieved at medium and long distances.

[0038] In order 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 control the parabolic reflector 2 to change its shape together with the reflector control assembly 3. Specifically, the bracket 4 translates along the axis of the coil frame 4, and the bracket 4 drives the driving 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 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] Combination Figure 5 Each screw motor structure 31 includes a motor body 311, a screw 312 and a 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 protrusion protruding horizontally outward, and the motor body 311 is fixed to the protrusion. The screw 312 is located outside the parabolic reflector 2, and the axis of the screw 312 is parallel to the axis of the coil frame 4. The screw nut 313 sleeved on the screw is fixed to the bracket 1 and can be fixed by screw connection.

[0041] Each hydraulic push rod structure 32 includes a cylinder body 321 and a piston 322. The cylinder body 321 is hinged to the bracket 1 and can be hinged through a mounting seat 324 with a double lug structure. The piston 322 is hinged to the parabolic reflector 2. The piston 322 can also be connected to the parabolic reflector through a double lug structure, and can also be connected to the parabolic reflector through a contact block 323 to increase the contact surface with the reflector and facilitate changing its shape. With this structure, when the focus of the parabola needs to be adjusted, the screw motor structure 31 works, at which time the motor body 311 remains fixed, the screw 312 rotates around its own axis and drives the screw nut 313 to move parallel to the axis of the coil frame 4 on the screw, the bracket 1 fixedly connected to the screw nut 313 is driven to translate, and the cylinder body 321 hinged to the bracket 1 rotates; at the same time, the hydraulic circuit (not shown in the figure) drives the hydraulic oil into the cylinder body 321 to drive the piston 322 to perform telescopic movement, and the telescopic amount of the piston can be accurately controlled by controlling the volume of the oil. As a result, the parabolic reflector 2 hinged to the piston 322 is subjected to a force and changes its shape.

[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, and 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. For 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, such as 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 to translate along the axis of the coil frame 4, the slider 72 translates 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 is processed on one surface. To ensure the connection strength, the slider 72 can be connected to a connecting plate 74 protruding from the bracket 1, and a screw can pass through the connecting plate 74 and the slider 72, as shown in FIG. 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 set to monitor the model and distance of the equipment to be charged, and the position of the secondary coil in the equipment can be calculated by using a control loop. By adjusting the screw motor structure and the hydraulic push rod structure, the shape and focus of the parabola can be controlled, so that the reflected wave of the primary coil is superimposed at the position of the equipment secondary coil to reach the maximum, and a set of primary coils can adapt to the effect of the secondary coils of equipment at different distances. After adjusting the shape of the parabola, the base station starts to emit high-frequency alternating current, and transmits power to the equipment through the divergent magnetic field coupling of the primary coil and the secondary coil. After the energy transmission is completed, the equipment drives away, and the receiving end is separated from the primary coil structure. At the same time, the screw motor can be controlled to restore the shape of the parabola reflector. From then on, the work of the primary coil structure is completed, and the base station enters the standby state.

[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, so that efficient wireless power transmission can be achieved 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-gathering wireless charging coil device includes the above-mentioned energy-gathering wireless charging primary coil structure based on parabolic reflection, and also includes a secondary coil structure arranged on the equipment to be charged. The secondary coil structure includes a secondary coil that is docked with the primary coil in the primary coil structure for wireless power transmission. The relevant structure, advantages, and working process of the coil device can be found in the above description of the primary coil structure, which will not be repeated here.

[0049] 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 suitable for wireless power transmission at different distances, and has strong applicability.

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

Claims

1. A primary coil structure for energy-gathering wireless charging based on parabolic reflection, characterized in that: It includes 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 parabola reflector to change its shape so as to adjust the focus of the parabola, and is connected between the bracket and the parabola reflector; 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 field.

2. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 1 is characterized in that: The primary coil is arranged in an annular manner around the axis of the coil frame into two layers, inner and outer, and upper and lower. The inner coil is closer to the parabolic reflector than the outer coil. The coils in the two layers are staggered and arranged at equal intervals.

3. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 1 or 2, characterized in that: The support can translate along the axis of the coil frame to control the parabolic reflector to change its shape through the reflector control assembly.

4. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 3 is characterized in that: The reflector control assembly includes a plurality of screw motor structures and a plurality of hydraulic push rod structures; Each lead screw motor structure comprises 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 comprises a cylinder and a piston, wherein the cylinder is hinged to the bracket, and the piston is hinged to the parabolic reflector.

5. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 4 is 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.

6. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 5 is 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 fixedly connected 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.

7. The parabolic reflection-based energy-gathering wireless charging primary coil structure according to claim 6 is characterized in that: The guide mechanisms are arranged symmetrically with respect to the axis of the coil frame, and are arranged at equal intervals of 90 degrees to the two screw motor structures. The guide mechanisms, the screw motor structures and the hydraulic push rod structures are arranged alternately and at equal intervals.

8. An energy-gathering wireless charging coil device, characterized in that: The invention comprises the energy-concentrating wireless charging primary coil structure based on parabolic reflection as described in any one of claims 1 to 7, and also comprises a secondary coil structure arranged on the equipment to be charged.

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