CN112735770B

CN112735770B - Double-layer wireless charging coil and charging equipment

Info

Publication number: CN112735770B
Application number: CN202011574222.6A
Authority: CN
Inventors: 何大伟; 李立忠; 吴昊
Original assignee: Shanghai Amphenol Airwave Communication Electronics Co Ltd
Current assignee: Shanghai Amphenol Airwave Communication Electronics Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-11-18
Anticipated expiration: 2040-12-25
Also published as: CN112735770A

Abstract

The invention provides a double-layer wireless charging coil and charging equipment, comprising: the coil comprises a first layer coil (1) and a second layer coil (2), wherein the first layer coil (1) and the second layer coil (2) are connected in series through an adapter plate (3); the first layer coil (1) and the second layer coil (2) respectively comprise N strands of enameled wires wound in parallel, and N is a natural number larger than 1. According to the invention, the wireless charging coil is constructed by the double-layer coils wound by the stranded parallel enameled wires, and the two layers of coils are connected in series through the adapter plate, so that the problem that an internal lead is led out of the coil can be avoided, and the local weight of the coil is reduced.

Description

Double-layer wireless charging coil and charging equipment

Technical Field

The invention relates to the technical field of wireless charging, in particular to a double-layer wireless charging coil and charging equipment.

Background

With the development of wireless charging technology, more and more terminal devices start to apply the wireless charging technology. In the field of wireless charging of a mobile phone terminal, due to continuous progress of an enameled wire winding process, a receiving coil is gradually turned from a Flexible Printed Circuit (FPC) coil to an enameled wire winding coil, and compared with the FPC coil, the enameled wire winding coil has the advantages of low cost, low resistance, high system efficiency and the like, and especially in a high-power wireless charging scheme of more than 30W, the enameled wire winding coil is almost the only choice.

However, the enameled wire wound coil still has its drawbacks, one of which is that its inner lead wire must be led out to the outside of the coil and must be passed out from above or below the coil, resulting in local thickening of the coil.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a double-layer wireless charging coil and a charging device.

In a first aspect, the present invention provides a dual-layer wireless charging coil, comprising: the coil structure comprises a first layer of coil and a second layer of coil, wherein the first layer of coil and the second layer of coil are connected in series through a transfer board; the first layer coil and the second layer coil respectively comprise N strands of enameled wires wound in parallel, and N is a natural number greater than N.

Optionally, the upper layer and the lower layer of the interposer respectively include N pads, and the N pads on the upper layer are welded to the N strands of enameled wires of the first layer of coil, and the N pads on the lower layer are welded to the N strands of enameled wires of the second layer of coil.

Optionally, the interposer includes: FPC double sided board.

Optionally, the interposer includes: and (7) a PCB board.

Optionally, the first layer of coil is wound in a circular ring shape from outside to inside, or wound in a circular ring shape from inside to outside.

Optionally, the second layer of coil is wound in a circular ring shape from inside to outside, or wound in a circular ring shape from outside to inside.

Optionally, the N strands of enameled wires in the first layer of coil and the N strands of enameled wires in the second layer of coil are in one-to-one correspondence in winding sequence.

Optionally, the winding sequence of at least M strands of enameled wires in the N strands of enameled wires in the first layer of coil and the N strands of enameled wires in the second layer of coil do not correspond to each other, and M is a positive integer not greater than N.

In a second aspect, the invention provides a charging device comprising the dual-layer wireless charging coil of any of the first aspect.

Compared with the prior art, the invention has the following beneficial effects:

according to the double-layer wireless charging coil and the charging device, the wireless charging coil is constructed by the double-layer coils wound by the stranded parallel enameled wires, and the two layers of coils are connected in series through the adapter plate, so that the problem that an internal lead is led out of the coils can be solved, and the local weight of the coils is reduced.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a first layer coil of a dual-layer wireless charging coil according to an embodiment of the present invention;

fig. 2 is a schematic side view of a dual-layer wireless charging coil according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of a first layer of the coil patch panel of FIG. 1;

fig. 4 is a schematic structural diagram of a second layer coil of a dual-layer wireless charging coil according to an embodiment of the present invention;

fig. 5 is a partial schematic view of the second layer of the coil interposer of fig. 4.

In the figure:

1-a first layer of coils;

2-second layer coil;

3-a patch panel;

4-copper wire.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the invention. All falling within the scope of the present invention.

Fig. 1 is a schematic structural diagram of a first layer coil of a dual-layer wireless charging coil provided in an embodiment of the present invention, fig. 2 is a schematic structural diagram of a side surface of the dual-layer wireless charging coil provided in the embodiment of the present invention, and fig. 4 is a schematic structural diagram of a second layer coil of the dual-layer wireless charging coil provided in the embodiment of the present invention. As shown in fig. 1, 2, and 4, the dual-layer wireless charging coil in this embodiment may include: the coil comprises a first layer coil 1 and a second layer coil 2, wherein the first layer coil 1 and the second layer coil 2 are connected in series through an adapter plate 3; the first layer coil 1 and the second layer coil 2 respectively comprise N strands of enameled wires wound in parallel, and N is a natural number greater than 1.

Fig. 3 is a partial schematic view of the first layer coil interposer in fig. 1, and fig. 5 is a partial schematic view of the second layer coil interposer in fig. 4. As shown in fig. 3 and 5, the upper layer and the lower layer of the interposer 3 respectively include N pads, the N pads on the upper layer are welded to the N strands of enameled wires of the first layer of coils, and the N pads on the lower layer are welded to the N strands of enameled wires of the second layer of coils.

Illustratively, the interposer 3 in the present embodiment may be an FPC double-sided board, or a PCB board.

In this embodiment, the first layer coil 1 is wound in a circular shape from the outside to the inside, or wound in a circular shape from the inside to the outside. And the corresponding second-layer coil 2 is wound into a circular ring shape from inside to outside or is wound into a circular ring shape from outside to inside.

Illustratively, the winding sequence of the N strands of enameled wires in the first layer coil 1 and the N strands of enameled wires in the second layer coil 2 corresponds to one another.

Specifically, taking 5 parallel enameled wires as an example, each turn of the first layer of wound coil and the second layer of wound coil is wound with 5 parallel wound wires. The most inner 5 strands of winding strand sequences of the first layer of winding coil are respectively marked as: the upper layer has the 1 st strand sequence, the 2 nd strand sequence, the 3 rd strand sequence, the 4 th strand sequence and the 5 th strand sequence. The sequence of the innermost 5 strands of the second layer of winding coil is respectively marked from inside to outside as follows: the 1 st strand sequence of the lower layer, the 2 nd strand sequence of the lower layer, the 3 rd strand sequence of the lower layer, the 4 th strand sequence of the lower layer and the 5 th strand sequence of the lower layer. In specific implementation, the 1 st sequence on the upper layer corresponds to the 1 st sequence on the lower layer, the 2 nd sequence on the upper layer corresponds to the 2 nd sequence on the lower layer, the 3 rd sequence on the upper layer corresponds to the 3 rd sequence on the lower layer, the 4 th sequence on the upper layer corresponds to the 4 th sequence on the lower layer, and the 5 th sequence on the upper layer corresponds to the 5 th sequence on the lower layer.

Illustratively, the winding sequence of at least M enameled wires in the N enameled wires in the first layer coil 1 and the N enameled wires in the second layer coil 2 does not correspond, and M is a positive integer not greater than N.

Specifically, the strand sequence of a part of the enameled wires is adjusted through the adapter plate, for example, the 1 st sequence on the upper layer corresponds to the 5 th sequence on the lower layer, the 2 nd sequence on the upper layer corresponds to the 4 th sequence on the lower layer, the 3 rd sequence on the upper layer corresponds to the 3 rd sequence on the lower layer, the 4 th sequence on the upper layer corresponds to the 2 nd sequence on the lower layer, and the 5 th sequence on the upper layer corresponds to the 1 st sequence on the lower layer.

In addition, the present embodiment does not limit the correspondence relationship between the winding strand sequences of the first layer coil and the second layer coil, and can be adjusted according to actual conditions.

The invention also provides charging equipment which comprises the double-layer wireless charging coil.

According to the double-layer wireless charging coil and the charging equipment, the wireless charging coil is constructed by the double-layer coils wound by the stranded parallel enameled wires, and the two layers of coils are connected in series through the adapter plate, so that the problem that an internal lead is led out of the coil can be avoided, and the local weight of the coil is reduced.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A dual-layer wireless charging coil, comprising: the coil comprises a first layer coil (1) and a second layer coil (2), wherein the first layer coil (1) and the second layer coil (2) are connected in series through an adapter plate (3); the first layer coil (1) and the second layer coil (2) respectively comprise N strands of enameled wires wound in parallel, and N is a natural number greater than 1; the upper layer and the lower layer of the adapter plate (3) respectively comprise N welding pads, the N welding pads positioned on the upper layer are welded with the N strands of enameled wires of the first layer of coil, and the N welding pads positioned on the lower layer are welded with the N strands of enameled wires of the second layer of coil; and the adapter plate (3) is only positioned at the joint of the first layer coil and the second layer coil (2), and the bypassing area of the first layer coil (1) and the second layer coil (2) is tightly attached without a gap.

2. The dual-layer wireless charging coil according to claim 1, wherein the interposer (3) comprises: FPC double sided board.

3. The dual-layer wireless charging coil according to claim 1, wherein the interposer (3) comprises: and (7) a PCB board.

4. The double-layer wireless charging coil according to claim 1, wherein the first layer coil (1) is wound in a circular shape from outside to inside or from inside to outside.

5. The double-layer wireless charging coil according to claim 1, wherein the second layer coil (2) is wound in a circular shape from inside to outside or in a circular shape from outside to inside.

6. The double-layer wireless charging coil according to any one of claims 1 to 5, wherein the winding sequence of the N strands of enameled wires in the first layer coil (1) and the N strands of enameled wires in the second layer coil (2) is one-to-one.

7. The double-layer wireless charging coil according to any one of claims 1-5, wherein at least M of the N enameled wires in the first layer coil (1) and the N enameled wires in the second layer coil (2) have different winding orders, and M is a positive integer not greater than N.

8. A charging device, comprising the dual layer wireless charging coil of any of claims 1-7.