CN112216495A

CN112216495A - Novel non-equal-width charging coil

Info

Publication number: CN112216495A
Application number: CN202010852243.3A
Authority: CN
Inventors: 陆秀东; 付怡; 顾天慈
Original assignee: Changzhou Xinci Technology Co ltd
Current assignee: Changzhou Xinci Technology Co ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-01-12

Abstract

The invention relates to the technical field of charging coils, in particular to a novel unequal-width charging coil which comprises a plurality of strands of conducting wires, wherein the surface of each strand of conducting wire is coated with an insulating layer, the plurality of strands of conducting wires form an interwoven annular coil in a spiral mode, the conducting wires in the coil are divided into an inner ring, a middle ring and an outer ring, and the wire widths among the conducting wires in the inner ring, the middle ring and the outer ring are different. After the structure is adopted, the widths of each strand of coil of the novel unequal-width charging coil are different, and the relative areas of the coils are different by utilizing the difference of the widths of the coils, so that the effect of reducing the proximity effect between the coils is achieved, and the charging efficiency of the coils is improved.

Description

Novel non-equal-width charging coil

Technical Field

The invention relates to the technical field of charging coils, in particular to a novel unequal-width charging coil.

Background

Wireless power transmission is also called wireless contact power transmission, and refers to a mode of power transmission from a power source to a load without direct electrical contact. Compared with the traditional induction type wireless power transmission technology, the magnetic coupling resonance wireless power transmission technology has the characteristics of original transmission distance, high transmission efficiency and the like, so that a new direction of the wireless power transmission technology is successfully developed, and the application and the development of the wireless power transmission technology in the charging fields of electric automobiles, portable electronics, smart homes, implanted medical instruments and the like are promoted.

At present, the mainstream winding mode is a double-layer plate, and the winding mode that the upper layer and the lower layer are connected in series is carried out on the innermost ring of the upper layer and the lower layer through a through hole. But all are coil designs of equal width between each strand of coil employed.

Chinese utility model patent CN 209895914U discloses a wireless charging coil, include: the substrate, set up first UV optical cement layer and first conductive circuit on the substrate, first UV optical cement layer is equipped with first spiral groove, first conductive circuit sets up in the first spiral groove. The utility model discloses a still disclose a wireless charging coil group, including articulamentum, first wireless charging coil and the wireless charging coil of second, first charging coil sets up the surface of articulamentum one side, the wireless charging coil of second sets up on the first wireless charging coil or the surface of articulamentum another floor, wherein, first wireless charging coil is above-mentioned wireless charging coil.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a wireless charging coil capable of effectively reducing coil proximity effect. .

In order to solve the technical problem, the novel unequal-width charging coil comprises a plurality of strands of conducting wires, wherein an insulating layer is coated on the surface of each strand of conducting wire, the strands of conducting wires form an interwoven annular coil in a spiral mode, the conducting wires in the coil are divided into an inner ring, a middle ring and an outer ring, and the wire widths among the conducting wires in the inner ring, the middle ring and the outer ring are different.

Preferably, the line width from the inner ring to the outer ring through the middle ring is gradually widened.

Preferably, the line width from the inner ring to the outer ring through the intermediate ring is gradually narrowed.

Preferably, the line width of the middle ring is larger than the line widths of the inner ring and the outer ring at two sides.

Preferably, the line width of the middle ring is smaller than the line widths of the inner ring and the outer ring at two sides.

After the structure is adopted, the widths of each strand of coil of the novel unequal-width charging coil are different, and the relative areas of the coils are different by utilizing the difference of the widths of the coils, so that the effect of reducing the proximity effect between the coils is achieved, and the charging efficiency of the coils is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a novel unequal-width charging coil according to the present invention.

Fig. 2 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a third embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fourth embodiment of the present invention.

FIG. 6 is a schematic diagram of the eddy current of the proximity effect of the present invention.

In the figure: 101 is an inner ring, 102 is an intermediate ring, and 103 is an outer ring.

Detailed Description

As shown in fig. 1, the novel unequal-width charging coil of the invention comprises a plurality of strands of wires, and the number of strands of the wires and the overall size of the coil are variable. The surface of each strand of wire is coated with an insulating layer, and the material of the wire can be copper wire, lead wire or other conductors. The multi-strand wire is formed into an interwoven annular coil in a helical fashion, although the coil may be wound into other cross-sectional shapes. The wires in the coil are divided into an inner ring 101, a middle ring 102 and an outer ring 103, and the wire widths of the wires in the inner ring 101, the middle ring 102 and the outer ring 103 are different.

As shown in fig. 6, the winding mode of the upper and lower layers of mainstream series connection at present, it is that the upper strata begins from the outside, to the inboard of winding, the rethread via hole switches on to the lower floor, the lower floor begins from the inboard again, toward the outside begins the winding, reach the point of being qualified for the next round of competitions, accomplish the wire winding, the linewidth all is equal between every strand of wire, this just leads to the proximity effect reinforcing between the wire, lead to the electric current in the conductor more to tend to conductor surface flow, form the vortex on the wire surface, the magnetic field intensity that arouses the coil distributes unevenly, the charging efficiency of coil module has been reduced. According to the unequal-width charging coil, the difference of the widths of the leads is utilized, so that the relative areas of the leads are different, the effect of reducing the proximity effect between the leads is achieved, and the charging efficiency of the coil is improved. In addition, the winding in the mode can improve the self-inductance coefficient of the coil, and can achieve the inductance value by using less winding length, so that the DCR (direct current resistance) is correspondingly reduced.

The first implementation mode comprises the following steps:

as shown in fig. 2, in the present embodiment, the line width of the inner ring 101 to the outer ring 103 via the intermediate ring 102 is gradually increased, that is, in the line width design, the line width of the conductive wire is gradually increased from the inner ring shown in 101 to the outer ring shown in 103 via the intermediate ring 102.

The second embodiment:

as shown in fig. 3, in the present embodiment, the line width of the inner ring 101 to the outer ring 103 through the intermediate ring 102 is gradually narrowed, that is, in the wire width design, the line width is gradually narrowed from the inner ring shown in 101 to the outer ring shown in 103 through the intermediate ring 102.

The third embodiment is as follows:

as shown in fig. 4, in the present embodiment, the wire has a larger line width in the design of line width, and the line width of the middle coil 102 is larger than the line widths of the inner and

outer coils

101 and 103 on both sides.

The fourth embodiment:

as shown in fig. 5, in the present embodiment, the wire has a smaller line width in the wire width design than the line widths of the inner and

outer circles

101 and 103 on both sides.

In the patent application of the invention, the width change of the lead in the coil can be in a regular proportional increasing mode or an irregular jump deformation mode; the width of the inner ring is gradually increased from the inner ring to the outer ring, the width of the inner ring is gradually decreased from the inner ring to the outer ring, the width of the middle part is increased, and the width distribution is irregular.

Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many variations or modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.

Claims

1. The utility model provides a novel non-uniform width charging coil, includes stranded wire, every strand wire surface cladding insulating layer, its characterized in that: the multi-strand wire forms an interwoven annular coil in a spiral mode, the wire in the coil is divided into an inner ring (101), a middle ring (102) and an outer ring (103), and the wire widths of the wire in the inner ring (101), the middle ring (102) and the outer ring (103) are different.

2. The novel unequal-width charging coil according to claim 1, characterized in that: the line width of the inner ring (101) reaching the outer ring (103) through the middle ring (102) is gradually widened.

3. The novel unequal-width charging coil according to claim 1, characterized in that: the line width of the inner ring (101) reaching the outer ring (103) through the middle ring (102) is gradually narrowed.

4. The novel unequal-width charging coil according to claim 1, characterized in that: the line width of the middle ring (102) is larger than the line widths of the inner ring (101) and the outer ring (103) on two sides.

5. The novel unequal-width charging coil according to claim 1, characterized in that: the line width of the middle ring (102) is smaller than the line widths of the inner ring (101) and the outer ring (103) on two sides.

6. The novel unequal-width charging coil according to claim 1, characterized in that: the width change of the conducting wire in the coil adopts a regular proportion increasing mode or an irregular jumping deformation mode.