Wireless power transfer coupling mechanism

Abstract

The application discloses a wireless power transmission coupling mechanism, which comprises a magnetic core and a plurality of coils which are located in different planes and connected in sequence, four coils in each plane each comprise an inner coil unit and an outer coil unit which are composed of Litz wires, and the outer coil unit and the inner coil unit are coaxial and coplanar; the single-plane cross series coils and the multi-plane same-direction series coils of the plurality of coil units are used to reasonably configure the current directions of the coils in a single plane and the coils in different planes, to enhance the self-inductance of the coils per unit area, to improve the transmission power energy of the coils, and to avoid the magnetic field coupling between the multi-plane coils, and the control difficulty of the coils is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wireless power transmission, and particularly relates to a large-power wireless power transmission coupling mechanism with strong anti-deviation performance. BACKGROUND

[0002] Wireless power transmission technology provides a new energy acquisition method for electrically driven electronic devices, and has great development potential in application scenarios such as electric vehicles, consumer electronics and smart homes.

[0003] The magnetic coupling mechanism is a key link of the magnetic coupling resonance type wireless power transmission, and the structure and parameter design thereof are directly related to the system performance. The coupling mechanism disclosed in the Chinese patent with the publication number CN113644756A “Method and device for forming magnetic beam focusing by multiple transmitting coils in wireless power transmission” arranges the centers of multiple transmitting coils in an equilateral triangle, and converges the magnetic field beams generated by the multiple transmitting coils to a receiving coil to improve the energy transmission efficiency. However, the coupling mechanism has low self-inductance per unit area of the coil, is difficult to control, and has weak horizontal transverse anti-deviation and vertical anti-deviation performance. SUMMARY

[0004] In view of the above deficiencies of the prior art, the application provides a large-power multi-layer series composite wireless power transmission coupling mechanism with strong anti-deviation performance.

[0005] The technical scheme adopted by the application to solve the technical problems is: a wireless power transmission coupling mechanism, comprising a magnetic core and a plurality of coils connected in sequence in different planes, each coil in a plane comprising a coil C11, a coil C12, a coil C13 and a coil C14; the coil C11 is divided into two parts: comprising N in an inner coil unit C11 composed of a number of turns of Litz wire -in and N out an outer coil unit C11 composed of a number of turns of Litz wire -out , the turns of wire N in wound in the inner coil unit C11 in the clockwise or counterclockwise direction with a turn spacing d1 -in , the lead-out wire of the inner coil unit C11 -in serves as an input terminal, and the outer coil unit C11 -in is formed by winding the inner coil unit C11 in the clockwise or counterclockwise direction with a turn spacing d1 -out , the outer coil unit C11 -out and the inner coil unit C11 -in are physically placed on the same axis and in the same plane; the coil C12 is divided into two parts: comprising N inInner coil unit C12 made of turns of Litz wire -in and N out Outer coil unit C12 made of turns of Litz wire -out , turns of wire N in Inner coil unit C12 wound in the clockwise or counterclockwise direction with a turn spacing dl -in Inner coil unit C12 -in with the lead wire as input terminal, inner coil unit C12 wound in the clockwise or counterclockwise direction with a turn spacing d2 -in Outer coil unit C12 -out Outer coil unit C12 -out and inner coil unit C12 -in are physically placed on the same axis and lie in the same plane; coil C13 is divided into two parts: comprising N in Inner coil unit C13 made of turns of Litz wire -in and N out Outer coil unit C13 made of turns of Litz wire -out , turns of wire N in Inner coil unit C13 wound in the clockwise or counterclockwise direction with a turn spacing dl -in Inner coil unit C13 -in with the lead wire as input terminal, inner coil unit C13 wound in the clockwise or counterclockwise direction with a turn spacing d3 -in Outer coil unit C13 -out Outer coil unit C13 -out and inner coil unit C13 -in are physically placed on the same axis and lie in the same plane; coil C14 is divided into two parts: comprising N in Inner coil unit C14 made of turns of Litz wire -in and N out Outer coil unit C14 made of turns of Litz wire -out , turns of wire N in Inner coil unit C14 wound in the clockwise or counterclockwise direction with a turn spacing dl -in Inner coil unit C14 -in with the lead wire as input terminal, inner coil unit C14 wound in the clockwise or counterclockwise direction with a turn spacing d4 -in Outer coil unit C14 -out Outer coil unit C14 -out and inner coil unit C14 -inare physically placed on the same axis and in the same plane; the outer coil unit C11 -out is connected to the output terminal of the outer coil unit C13 -out , and the input terminal of the inner coil unit C13 -in is connected to the input terminal of the inner coil unit C12 -in , and the output terminal of the outer coil unit C12 -out is connected to the output terminal of the outer coil unit C 14-out , and the output terminal of the outer coil unit C ij and C kj are connected in series in the same plane, and the coils C i and C i+1 are connected in series in different planes.

[0006] Further, the four coils in the same plane are wound in the same direction.

[0007] Still further, the connection mode of the coils C i and C i+1 in adjacent planes is that the two coil units in the same z-axis are directly connected in series, and the winding directions are opposite, and the winding directions of the other two coil units and the two coil units in the same z-axis in the previous plane are the same.

[0008] Still further, the winding directions of the four coils in the same plane are different. The coil parameters in different planes in each layer are the same.

[0009] The application has the following beneficial effects: the single-plane cross-series coils and the multi-plane same-direction series coils of the multiple coil units reasonably configure the current directions of the coils in each single plane and the coils in different planes, enhance the self-inductance of the coils per unit area, improve the transmission power and energy of the coils, and do not have the magnetic field coupling between the multi-plane coils, thereby reducing the control difficulty of the coils. The application optimizes the structural characteristic parameters and the spatial positions of the coils, reduces the coupling path magnetic resistance between the transmitting and receiving mechanisms, realizes the regulation and control of the coupling magnetic field distribution, makes the excitation magnetic field of the coupling mechanism present in unilateral bipolar distribution, and improves the horizontal lateral shift and vertical shift range of the coupling mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural schematic diagram of an embodiment of the application. EMBODIMENT

[0011] To further illustrate the purpose and technical scheme of the application, specific embodiments will be further described in detail below with reference to the drawings.

[0012] This invention discloses a high-power, highly offset-resistant wireless power transfer coupling mechanism, comprising a magnetic core and multiple coils located in different planes and connected sequentially. Each coil in each plane includes coils C11 to C14. The specific technical solution of the coils in a single plane is illustrated using the coils in plane 1 as an example. Figure 1 As shown, the coil in plane 1 is divided into four basic coil units: coil C11, coil C12, coil C13 and coil C14. The four basic coil units have the same external dimensions and similar structures, and are all composed of inner and outer coil units with different turn pitches.

[0013] The coil C11 is divided into two parts: including N in Inner coil unit C11 composed of Zylitz wire -in and N out Outer coil unit C11 composed of Zylitz wire -out , wire turns N in The inner coil unit C11 is wound with a turn spacing d1 in either clockwise or counterclockwise direction. -in Inner coil unit C11 -in The lead wire is used as the input terminal, and the inner coil unit C11 is wound in a clockwise or counterclockwise direction with a turn spacing d1. -in Forming the outer coil unit C11 -out Outer coil unit C11 -out and inner coil unit C11 -in Physically placed on the same axis (the basic unit C of each layer of coil) ij With basic unit C kj The center points are on the same Z-axis and lie on the same plane (coplanar).

[0014] Coil C12 is divided into two parts: including N in Inner coil unit C12 composed of Zylitz wire -in and N out C12 outer coil unit composed of Zylitz wire -out , wire turns N in The inner coil unit C12 is wound with a turn spacing d1 in either clockwise or counterclockwise direction. -in Inner coil unit C12 -in The lead wire is used as the input terminal, and the inner coil unit C12 is wound in a clockwise or counterclockwise direction with a turn spacing d2. -in Forming the outer coil unit C12 -out Outer coil unit C12 -out and inner coil unit C12 -inphysically placed on the same axis (coaxial) and in the same plane (coplanar).

[0015] The coil C13 is divided into two parts: including N in The inner coil unit C13 made of turns of Litz wire -in and N out The outer coil unit C13 made of turns of Litz wire -out , the turns of wire N in The inner coil unit C13 is wound in the clockwise or counterclockwise direction with a turn-to-turn spacing d1 -in The inner coil unit C13 -in The lead wire of the inner coil unit C13 -in The outer coil unit C13 -out The outer coil unit C13 -out and the inner coil unit C13 -in are physically coaxial and coplanar.

[0016] The coil C14 is divided into two parts: including N in The inner coil unit C14 made of turns of Litz wire -in and N out The outer coil unit C14 made of turns of Litz wire -out , the turns of wire N in The inner coil unit C14 is wound in the clockwise or counterclockwise direction with a turn-to-turn spacing d1 -in The inner coil unit C14 -in The lead wire of the inner coil unit C14 -in The outer coil unit C14 -out The outer coil unit C14 -out and the inner coil unit C14 -in are physically coaxial and coplanar.

[0017] The four coils C11-C14 in the same plane have the same winding direction. In this way, the outer coil unit C11 -out and the inner coil unit C11 -in are electrically and magnetically in series, the current direction is the same, the magnetic flux is increased, and the winding direction is different, the current direction is different, and the magnetic flux is weakened.

[0018] The lead wire of the outer coil unit C11 -out is the input terminal of the outer coil unit C13 -outthe output terminal of the inner coil unit C13 -in the input terminal of the inner coil unit C12 -in the input terminal of the outer coil unit C12 -out the output terminal of the outer coil unit C 14-out the output terminal of the inner coil unit C11~14 are cross-connected in series in a single plane.

[0019] the coils C ij and C kj are connected in series in the same direction in different planes.

[0020] In order to ensure that the current flowing directions of the two coils in different layers are the same, the connection modes of the adjacent coil C i and C i+1 in the embodiment are as follows: the two coil units with the same z axis in the adjacent planes are directly connected in series, and the winding directions are opposite, while the winding directions of the other two coil units and the two coil units with the same z axis in the previous plane are the same.

[0021] In another embodiment of the present application, the winding directions of the four coils in the same plane are different.

[0022] In another embodiment of the present application, the parameters of the coils in different planes are the same. Further, the gap between the last turn of the inner coil unit C11 -in and the first turn of the outer coil unit C11 -out is C gx mm in the X direction and C gy mm in the Y direction, the outer dimension of the outer coil C ij-out is x mm x y mm, and the dimensions of the inner coil C ij-in in the X and Y directions are x o-in mm and y o-in mm respectively.

[0023] Those skilled in the art can easily understand that the above description is only the preferred use case of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wireless power transmission coupling mechanism, characterized in that: It includes a magnetic core and multiple coils located in different planes and connected in sequence, wherein each coil in the plane includes coils C11 to C14; Coil C11 includes N in Inner coil unit C11 composed of Zylitz wire -in and N out outer coil unit C11 composed of Zylitz wire -out , wire turns N in The inner coil unit C11 is wound with a turn spacing d1 in either clockwise or counterclockwise direction. -in Inner coil unit C11 -in The lead wire is used as the input terminal, and the inner coil unit C11 is wound in a clockwise or counterclockwise direction with a turn spacing d1. -in Forming the outer coil unit C11 -out Outer coil unit C11 -out and inner coil unit C11 -in Series; Coil C12 includes N in Inner coil unit C12 composed of Zylitz wire -in and N out C12 outer coil unit composed of Zylitz wire -out , wire turns N in The inner coil unit C12 is wound with a turn spacing d1 in either clockwise or counterclockwise direction. -in Inner coil unit C12 -in The lead wire is used as the input terminal, and the inner coil unit C12 is wound in a clockwise or counterclockwise direction with a turn spacing d2. -in Forming the outer coil unit C12 -out Outer coil unit C12 -out and inner coil unit C12 -in Series; Coil C13 includes N in Inner coil unit C13 composed of Zylitz wire -in and N out C13, an outer coil unit composed of Zylitz wire -out , wire turns N in The inner coil unit C13 is wound with a turn spacing d1 in either clockwise or counterclockwise direction. -in Inner coil unit C13 -in The lead wire is used as the input terminal, and the inner coil unit C13 is wound in a clockwise or counterclockwise direction with a turn spacing d3. -in Forming the outer coil unit C13 -out Outer coil unit C13 -out and inner coil unit C13 -in Series; Coil C14 is divided into two parts: including N in Inner coil unit C14 composed of Zylitz wire -in and N out C14, an outer coil unit composed of Zylitz wire -out , wire turns N in The inner coil unit C14 is wound with a turn spacing d1 in either clockwise or counterclockwise direction. -in Inner coil unit C14 -in The lead wire is used as the input terminal, and the inner coil unit C14 is wound in a clockwise or counterclockwise direction with a turn spacing d4. -in Forming the outer coil unit C14 -out Outer coil unit C14 -out and inner coil unit C14 -in Series; Outer coil unit C11 -out The lead wire serves as the outer coil unit C13 -out The output terminal, inner coil unit C13 -in The input terminal serves as the inner coil unit C12 -in The input terminal, outer coil unit C12 -out The output terminal is used as the outer coil unit C. 14-out The output terminals form coils C11 to 14 connected in series in a single plane; Coils in different planes are connected in series in sequence to form coils in the same direction connected in multiple planes.

2. The wireless power transmission coupling mechanism according to claim 1, characterized in that, The four coils on the same plane are wound in the same direction.

3. The wireless power transmission coupling mechanism according to claim 2, characterized in that, The adjacent planar coil C i With C i+1 The connection method is as follows: two coil units on the same z-axis in adjacent planes are directly connected in series with opposite winding directions, while the other two coil units are wound in the same direction as the two coil units on the same z-axis in the previous plane.

4. The wireless power transmission coupling mechanism according to claim 1, characterized in that, The four coils on the same plane are wound in different directions.

5. A wireless power transmission coupling mechanism according to claim 1, 2, 3, or 4, characterized in that, The coil parameters are the same in different planes.

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