CN108539870B

CN108539870B - Multi-coil arrangement method for wireless charging

Info

Publication number: CN108539870B
Application number: CN201810400360.9A
Authority: CN
Inventors: 王方云
Original assignee: Shenzhen Zhuoxin Micro Technology Co ltd
Current assignee: Shenzhen Zhuoxin Micro Technology Co.,Ltd.
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2021-08-20
Anticipated expiration: 2038-04-28
Also published as: CN108539870A

Abstract

The invention discloses a multi-coil arrangement method for wireless charging, which comprises 6N + X identical coils for wireless charging, wherein N, X are all non-negative integers, and X is less than 6, and the method further comprises the following steps: A. dividing each 6 coils into one group, and mounting N groups on the substrate; B. dividing each group of coils into an upper layer and a lower layer, wherein each layer comprises 3 coils; C. b, mounting the lower layer of 3 coils in the step B on a substrate, and connecting the centers of the lower layer of 3 coils to form a regular triangle; D. c, mounting the 3 coils on the upper layer in the step B on the 3 coils on the lower layer in the step C, and connecting the centers of the 3 coils on the upper layer to form a regular triangle which is centrosymmetric with the regular triangle in the step C; E. the remaining X coils are uniformly mounted over the N sets of coils. The wireless charging can be carried out at high speed and high energy efficiency.

Description

Multi-coil arrangement method for wireless charging

Technical Field

The invention relates to a coil arrangement method, in particular to a multi-coil arrangement method for wireless charging.

Background

The wireless charging technology is derived from a wireless power transmission technology and can be divided into a low-power wireless charging mode and a high-power wireless charging mode. The low-power wireless charging is usually performed by an electromagnetic induction type, such as Qi charging for mobile phones, but the popular wireless charging for electric vehicles is performed by an induction type. The high-power wireless charging usually adopts a resonant mode, and the power supply equipment transmits energy to a power utilization device, and the device charges a battery by using the received energy and simultaneously provides the power utilization device for self operation. Because the charger and the electric device transmit energy by magnetic field, the charger and the electric device are not connected by electric wires, so that no conductive contact is exposed.

The coil of the existing electromagnetic induction type charging device comprises one layer and a plurality of layers of structures, the magnetic field intensity of the charging device adopting the one layer of structure is weaker, the charging is slow, the coil arrangement of the plurality of layers of structures is generally formed by simple superposition on the one layer of structure, the energy consumption is higher, and the energy utilization rate is low.

Disclosure of Invention

The invention aims to solve the technical problems that the coil of the existing electromagnetic induction type charging device comprises arrangement of a layer structure and a multilayer structure, the charging device adopting the layer structure is weak in magnetic field intensity and slow in charging, the coil arrangement of the multilayer structure is generally formed by simple superposition on the layer structure, the energy consumption is high, and the energy utilization rate is low.

The invention is realized by the following technical scheme:

the multi-coil arrangement method for wireless charging comprises 6N + X identical coils for wireless charging, wherein N, X are all non-negative integers, and X is less than 6, and the method further comprises the following steps:

A. dividing each 6 coils into one group, and mounting N groups on the substrate;

B. dividing each group of coils into an upper layer and a lower layer, wherein each layer comprises 3 coils;

C. b, mounting the lower layer of 3 coils in the step B on a substrate, and connecting the centers of the lower layer of 3 coils to form a regular triangle;

D. c, mounting the 3 coils on the upper layer in the step B on the 3 coils on the lower layer in the step C, and connecting the centers of the 3 coils on the upper layer to form a regular triangle which is centrosymmetric with the regular triangle in the step C;

E. the remaining X coils are uniformly mounted over the N sets of coils.

And B, forming a central symmetrical pattern by N groups of coils arranged on the substrate in the step A, wherein the N groups of coils are uniformly distributed in the central symmetrical pattern.

In the step E, the method for uniformly mounting the remaining X coils above the N groups of coils includes the steps of:

e1, arranging the X coils into a positive X-shaped polygon, wherein the centers of the X coils are respectively positioned on X vertexes of the positive X-shaped polygon;

e2, installing the X coils in the step E1 above the N groups of coils, and enabling the geometric center of the positive X-shape to coincide with the symmetric centers of the N groups of coils.

When X equals 4, the method of uniformly mounting the remaining 4 coils over the N sets of coils comprises the steps of:

e1, arranging the 4 coils into a diamond shape, wherein the centers of the 4 coils are respectively positioned on 4 vertexes of the diamond shape;

e2, installing the 4 coils in the step E1 above the N groups of coils, and enabling the geometric center of the rhombus to be coincident with the symmetrical centers of the N groups of coils.

And the coil and the substrate are bonded through insulating adhesives.

And C, the distance between the centers of any two coils in the 3 coils in the step C is less than 2 times of the diameter of the coil. The adoption of the sizes can ensure that the coil on the upper layer in the step D can be arranged on the coil on the lower layer in the step C to form a multilayer structure.

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

1. the multi-coil arrangement method for wireless charging adopts a modular structure, can adapt to substrates of various specifications, and is convenient to expand;

2. the multi-coil arrangement method for wireless charging effectively improves the magnetic field intensity in the charging area and accelerates the charging speed;

3. the multi-coil arrangement method for wireless charging is reasonable in arrangement and high in energy efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the present invention.

Reference numbers and corresponding part names in the drawings:

1-substrate, 2-lower coil, 3-upper coil and 4-independent coil.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

Example 1

The invention relates to a multi-coil arrangement method for wireless charging, which comprises 6N + X identical coils for wireless charging, wherein N, X are all non-negative integers, and X is less than 6, and the method further comprises the following steps:

E. the remaining X coils are uniformly mounted over the N sets of coils.

And the coil and the substrate are bonded through insulating adhesives.

Example 2

As shown in fig. 1, this embodiment is a coil arranged according to the method of embodiment 1, where N is 2 and X is 2, that is, the coil includes 2 groups of coils with a diameter of 4cm, each group of coils includes 3 lower coils 2 mounted on a substrate 1, the centers of the 3 lower coils 2 are connected to form a regular triangle with a side length of 6cm, the coil further includes 3 upper coils 3 mounted on the lower coils 2, the centers of the 3 upper coils 3 are connected to form a regular triangle which is centrosymmetric to the regular triangle formed by the lower coils 2, and the coil further includes 2 independent coils 4, and the two independent coils 4 are respectively mounted on the geometric centers of the 2 groups of coils.

Example 3

As shown in fig. 2, the present embodiment is different from embodiment 2 in that when X is equal to 4, the method of uniformly mounting the remaining 4 coils above the N sets of coils includes the steps of:

e2, installing the 4 coils in the step E1 above the 2 groups of coils, and installing two opposite vertexes in the rhombus on the geometric centers of the 2 groups of coils respectively so that the geometric center of the rhombus is coincident with the symmetric center of the 2 groups of coils.

Example 4

This example is a comparison between the arrangement of the coils arranged by the method of example 2 in the charging substrate with the same size and the existing coil arrangement, where the coils are TB6865AFG coils, the receiver is a mobile phone with a 3000mAh battery, and the test results are shown in table 1:

	scheme of example 2	Conventional one-layer arrangement	Conventional two-layer arrangement
				Number of coils	14	10	20
Power of	70w	50w	100w
				Charging time	54min	80min	48min
Energy consumption	63wh	66.7wh	80wh

TABLE 1

As can be seen from table 1, the power consumption is reduced by 5.5% and the charging time is reduced by 32.5% in the case of the solution of example 2, compared with the conventional structure with one-layer arrangement, and the power consumption is reduced by 21.25% and the charging time is increased by only 12.5% in the case of the solution of example 2, compared with the conventional structure with two-layer arrangement. The main reason for the above result is the edge effect of the electromagnetic field, and the wireless charging receiving device of the general device is located at the center of the device, so that the coil utilization rate of the charging device arranged in the traditional two layers at the edge is lower, and the power consumption is larger.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The multi-coil arrangement method for wireless charging is characterized by comprising 6N + X identical coils for wireless charging, wherein N, X are all non-negative integers and X =4, and further comprising the following steps:

E. uniformly installing the rest X coils above the N groups of coils;

the N groups of coils arranged on the substrate in the step A form a centrosymmetric pattern, and the N groups of coils are uniformly distributed in the centrosymmetric pattern;

in the step E, when X is equal to 4, the method for uniformly mounting the remaining 4 coils above the N groups of coils includes the following steps:

e2, installing the 4 coils in the step E1 above the N groups of coils, and enabling the geometric center of the rhombus to coincide with the symmetric centers of the N groups of coils;

and C, the distance between the centers of any two coils in the 3 coils in the step C is less than 2 times of the diameter of the coil.

2. The method of claim 1, wherein the coils are bonded to each other and to the substrate by an insulating adhesive.