CN105304312B - The preparation method and Wireless charging coil of a kind of Wireless charging coil - Google Patents
The preparation method and Wireless charging coil of a kind of Wireless charging coil Download PDFInfo
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- CN105304312B CN105304312B CN201510829337.8A CN201510829337A CN105304312B CN 105304312 B CN105304312 B CN 105304312B CN 201510829337 A CN201510829337 A CN 201510829337A CN 105304312 B CN105304312 B CN 105304312B
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Abstract
The present invention proposes a kind of preparation method and Wireless charging coil of Wireless charging coil, S1：One metal sheet is provided, if there is impurity on metal sheet surface, metal sheet is first cleaned and goes the removal of impurity；S2：Developing process is exposed by coil design pattern form coil pattern mask in the metal sheet upper surface and/or lower surface, wherein, if two surfaces are respectively formed coil pattern mask, the coil pattern on two surfaces should be symmetrical；S3：Chemical etching is carried out to the metal sheet, metal sheet is removed and reaches the standard grade the metal in region outside circular pattern, forms the wire coil plate of hollow out；S4：Form coil finished product or cut again to form single coil finished product by cleaning again, after surface oxidation-resistant protection and plating protection processing.The present invention can be used in the limited Product environment of thickness space, can be required to make the profile of coil according to different spatial forms, charge efficiency is high.
Description
Technical field
The invention belongs to Coil technique, more particularly to be planar structure coil, e.g. wireless charging technology
Coil.
Background technology
Inductive charging coil contactless charge coil in other words, it is derived from a kind of new caused by wireless power conveying technology
Type charging technique, it can be used for the closely contactless wireless charging device that conduction principle transmission energy is sensed using near field,
It is wirelessly mobile communication equipment, PC (personal computer) equipment and small intelligent electronic product, intelligence dresses product
Deng charging.
For mobile communication equipment, the coil of the wireless charging device of PC equipment and small intelligent electronic product, coil
Inductance value requirement in more than 12uH, the DC impedance value requirement to coil overall length is less than 1ohm, the efficiency of whole charging system
It is required that more than 65%, charging process coil temperature, which rises, to be required to be less than 10 DEG C.The system of Wireless charging coil the most frequently used at present
It is to use enamel-covered wire coiling as mode, is commonly called as wire winding, referring to Fig. 1 and Fig. 2, is had the disadvantages that using this method：
1. because the cross section of enamel-covered wire coiling is circle, cross section can only be increased by increasing the latus rectum of cross section
Product, it is impossible to which cross sectional shape is adjusted according to the open ended thickness space of the reality of electronic product；
2. technique for coiling can only be around circle, the coil of the irregular figure such as square and oval (is limited by wire winding and processing procedure
System), the profile of coil can not be designed according to the spatial form and environment of different product；
3. the coil of enamel-covered wire coiling, the flatness error of whole coil is bigger, and error is even greater than 1.5 times of line footpath
More than, that is to say, that if the thickness space of electronic product isIt can only so select
The coil of line footpath, otherwise product will accommodate not lower coil；
4. coil easily falls apart；
5. enamel-covered wire top layer need to take certain thickness space, it is unfavorable for product miniaturization.
The content of the invention
The technical problems to be solved by the invention are to provide the preparation method and wireless charging electric wire of a kind of Wireless charging coil
Circle, can be used in the limited Product environment of thickness space, can be customized according to different space environment coil single line disk into shape
Shape, charge efficiency are high.
To solve the above problems, the invention provides a kind of preparation method of Wireless charging coil, comprise the following steps：
S1：One metal sheet is provided, if there is impurity on metal sheet surface, metal sheet is first cleaned and goes the removal of impurity；
S2：Developing process is exposed by coil pattern form coil in the metal sheet upper surface and/or lower surface
Patterned mask, wherein, if two surfaces are respectively formed coil pattern mask, the coil pattern on two surfaces is symmetrical；
S3：Chemical etching is carried out to the metal sheet, metal sheet is removed and reaches the standard grade the metal in region outside circular pattern, shape
Into the wire coil plate of hollow out；
S4：By cleaning again, after surface oxidation-resistant protection and plating protection processing, form coil finished product or cut to be formed again
Single coil finished product.
According to one embodiment of present invention, in step s 2, one in the metal sheet upper and lower surface
When coil pattern mask is formed on surface, coil thickness plays scratching for coil fixation in below 2mm, another attached last layer in surface
Property film, in step s3 by the way of one side is fully etched to coil pattern mask surface carry out chemical etching,
Until metal sheet upper and lower surface runs through.
According to one embodiment of present invention, in step s 2, in the upper and lower surface of the metal sheet
When forming coil pattern mask, coil thickness is first by the way of two-sided etch-forming in step s3 between 2mm~5mm
After carrying out being chemically etched into the depth of metal sheet 1/2 on a surface, on the surface, attached last layer plays scratching for coil fixation
Property film, chemical etching is carried out on another surface afterwards, until metal sheet upper and lower surface runs through.
According to one embodiment of present invention, the flexible thin film is the PI films with gum, PET film, to keep etching
The shape of coil afterwards.
According to one embodiment of present invention, in step s 4, the method for the surface oxidation-resistant protection includes plating electrophoresis
Paint, the gold-plated protective layer of nickel plating or spraying protective layer.
According to one embodiment of present invention, in step s 4, the plating protection processing is used to connect for wire coil
Solderability electroplating processes are done on the surface of conductive component.
According to one embodiment of present invention, the coil finished form will according to spatial form different in practical application
Ask and determine.
According to one embodiment of present invention, the base material of the metal sheet is copper, silver, aluminium, or containing in copper, silver, aluminium
The alloy material of any one or a few material.
Present invention also offers a kind of Wireless charging coil, it is characterised in that including a metal sheet, the metal sheet
The metal of the exterior domain of coil pattern is removed by way of chemical etching after exposure imaging, forms the metal wire girth sheets of a hollow out
Part, after coil plate by being cleaned again, surface oxidation-resistant is protected and plating protection is handled, form coil finished product or cut into list again
Individual coil finished product.
According to one embodiment of present invention, the metal sheet upper surface and/or lower surface are accompanied by one layer and play coil
The flexible thin film of fixation.
According to one embodiment of present invention, the flexible thin film is the PI material membranes with gum, or PET material film, is used
To keep the shape of coil after etching.
According to one embodiment of present invention, the coil finished product according to different spatial form requirement in practical application and
It is determined that.
According to one embodiment of present invention, the thickness of the metal sheet is between 0.01mm~5mm.
According to one embodiment of present invention, the base material of the metal sheet is copper, silver, aluminium, or containing in copper, silver, aluminium
The alloy material of any one or a few material.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art：
Required coil is obtained after being chemically treated using sheet metal, can be according to the actual (real) thickness sky of electronic product
Between select suitable thickness of slab, and single line shape of cross section can be approximate rectangular or trapezoidal, so as to be imitated according to charging
The requirement of rate adjusts the length-width ratio of cross section to design, and optimal cross-section product is obtained, available for the less product ring of thickness space
In border, charge efficiency can also be adjusted optimally；Need not be as the enamel-covered wire in background technology in top layer coated insulation
Layer, due to having certain hardness after metal sheet etching, thus Wireless charging coil has solid shape, be unlikely to deform or
Fall apart, thus without the insulating barrier on surface, be also thinned coil；Carrying out chemical etching using sheet metal can make irregularly
The coil of shape, and enamel-covered wire winding method (enamel-covered wire coiling can only coiling formed part regular shape) is no longer limited to, because
And the profile of coil can be designed according to the different spaces shape and environment of product.
Brief description of the drawings
Fig. 1 is the structural representation of the enamel-covered wire coiling of prior art；
Fig. 2 is that the coil in Fig. 1 carries out the partial structural diagram after cutting along cutting line A-A；
Fig. 3 is the schematic flow sheet of the Wireless charging coil preparation method of one embodiment of the invention；
Fig. 4 is the structural representation of the Wireless charging coil of one embodiment of the invention；
Fig. 5 is that the Wireless charging coil in Fig. 4 carries out the partial structural diagram after cutting along cutting line B-B；
Fig. 6 is the structural representation of the Wireless charging coil of another embodiment of the present invention.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
Many details are elaborated in the following description in order to fully understand the present invention.But the present invention can be with
Much it is different from other manner described here to implement, those skilled in the art can be in the situation without prejudice to intension of the present invention
Under do similar popularization, therefore the present invention is not limited to the specific embodiments disclosed below.
Fig. 3 shows a kind of Wireless charging coil preparation method, comprises the following steps：
S1：One metal sheet is provided, if there is impurity on metal sheet surface, metal sheet is first cleaned and goes the removal of impurity；
S2：Developing process is exposed by coil pattern form coil in the metal sheet upper surface and/or lower surface
Patterned mask, wherein, if two surfaces are respectively formed coil pattern mask, the coil pattern on two surfaces is symmetrical；
S3：Chemical etching is carried out to the metal sheet, metal sheet is removed and reaches the standard grade the metal in region outside circular pattern, shape
Into the wire coil plate of hollow out；
S4：By cleaning again, after surface oxidation-resistant protection and plating protection processing, form coil finished product or cut to be formed again
Single coil finished product.
Fig. 1 method is described in detail below by specific embodiment.
In step sl, from the material of metal sheet, the sheet metal for etching manufacture coil can be copper, silver,
Aluminium, or the one or more and the sheet alloys of other materials of these materials, or several combinations of these materials are formed
Sheet alloy, but be not restricted to that this, other hard metal materials for being used for being formed coil that can be capable of conduction can be used
It is used as the metal sheet of the present invention, sheet metal is cut into advance by the designed size of coil typesetting, wherein, a metal
Plate can be used for forming multiple coils, finally cut into single small coil again, or can also be used directly to form one
Coil, the thickness of sheet metal can be for example 0.01mm~5mm, afterwards be cleaned metal sheet, and cleaning can be with
Using existing cleaning in the prior art, certainly, if the surface of metal sheet can ensure no or few impurity
If, do not clean also possible.
In step s 2, developing process is exposed according to coil pattern to metal sheet, if two sides will etch,
So two sides will do exposure development, and symmetrical, and error is less than 0.03mm, ensure the flatness of the single line side wall of etching,
Clean metal sheet upper surface and/or lower surface form coil pattern mask, and the shape of the mask and the shape of coil are pair
Should be consistent, for preventing subsequent etching processes from etching away coiler part, that is to say, that coil pattern mask is for carving
Coiler part is protected in etching technique, mask can use mask coating technique of the prior art, if carrying out one side quarter
If erosion, in the upper surface of metal sheet or lower surface coating mask；If carrying out two-sided etching, in the upper of metal sheet
Surface and lower surface are respectively formed coil pattern mask, and the coil pattern of upper and lower surface is symmetrical, and error is less than 0.03mm, protect
The coil single line side wall that card etching is formed afterwards is smooth.
It is exposed after development in step s3, wet-etching technology is carried out to the metal sheet, etches metal sheet
Openwork part is formed, the pattern form of the openwork part is roughly the same with the coil pattern shape of design.
In one embodiment, in step s 2, line is formed on the surface in metal sheet upper and lower surface
During circular pattern mask, one is enclosed on below 2mm, another surface for not forming coil pattern mask suitable for the coil thickness of formation
Layer plays the flexible thin film of coil fixation, in step s3 to coil pattern mask by the way of one side is fully etched
Surface carry out chemical etching, until metal sheet upper and lower surface runs through.One side etching is adapted to than relatively thin coil, metal sheet
Thickness range can between 0.01mm~2mm, the shape of cross section of the coil solid wire after etching in approximate rectangular or
Approximate trapezoid.
In one embodiment, in step s 2, it is respectively formed on coil in the upper and lower surface of the metal sheet
During patterned mask, coil thickness is between 2mm~5mm, in step s3 first on a surface by the way of two-sided etch-forming
Carry out after being chemically etched into the depth of metal sheet 1/2, on the surface, attached last layer plays the flexible thin film of coil fixation, it
Chemical etching is carried out on another surface afterwards, until metal sheet upper and lower surface runs through.It is thicker that two-sided etching is applied to required coil
Situation, the thickness range of metal sheet is adapted between 2mm~5mm, because being the thicker metal sheets of more than 2mm, coil
It is that the gash depth corroded is deeper to have the defects of enough intensity, etching, and groove width progressive will broaden, between ensureing to etch
Consistent, the method that thicker more than 2mm sheet material preferably uses two facet etches of gap width, the single line of Wireless charging coil it is transversal
Face is shaped as approximate rectangular or approximate trapezoid.
Flexible thin film for example can be the PI films (Kapton) with gum, or PET film, effect are reinforced than relatively thin
Metal sheet, being further ensured that after metal sheet is fully etched into coil to fall apart, the shape of hold-in winding, but material
Material is not restricted to this, can also be the film that other flexible materials that can play fixation are formed.
In step s 4, by cleaning again, after surface oxidation-resistant protection and plating protection processing, coil finished product or again is formed
Cut to form single coil finished product.Cleaning is that the cleaning metal material in the prior art after etching technics uses
Technique, it will not be repeated here.Optionally, the method for surface oxidation-resistant protection includes plating electrophoretic paint, the gold-plated protective layer of nickel plating or spray
Stopping off, two-sided overlay film protection is carried out, set oxidation-resistant film to prevent metal from aoxidizing.The Wireless charging coil of the present invention
Insulating barrier can be formed on surface.Optionally, plating protection processing is used to connect to do on the surface of conductive component for wire coil
Solderability electroplating processes, conductive component are that coil realizes the electrical component being electrically connected with.
The present invention also provides a kind of Wireless charging coil, including a metal sheet, and the metal sheet passes through exposure imaging
The mode of chemical etching removes the metal of the exterior domain of coil pattern afterwards, forms the wire coil plate of a hollow out, coil plate
By cleaning again, surface oxidation-resistant protection and plating protection processing after, formed coil finished product or cut into again single coil into
Product.
The global shape of the Wireless charging coil of the present invention determines according to different spatial form requirement in practical application,
Its unitary construction can be surface ga(u)ge then or irregular shape dish configuration, be not limited to circle, the rule such as square and oval
Shape, the shape being recessed referring to Fig. 5, Wireless charging coil in an oval but wherein arc side, and referring to Fig. 6, Wireless charging coil
It is square but one jiao of recessed shape, other arbitrary shapes can also be made, to adapt to the space of application scenario, compared to enamel-covered wire
It is higher for the fitness of product for the coil that coiling is formed.
Referring to Fig. 4 and Fig. 5, Wireless charging coil includes a metal sheet, the upper surface of the metal sheet and/or following table
Face is provided with coil pattern mask, and the regional structure on the metal sheet in addition to coil pattern corresponding region is insertion metal
The openwork part of plate upper and lower surface, metal sheet circular pattern corresponding region of reaching the standard grade are configured to the list of Wireless charging coil
Line, the shape of cross section of the single line is rectangle.In Fig. 5, obvious spacing, therefore, single wire surface are can see between single line
And insulating barrier is not needed, because Wireless charging coil will not fall apart, will not also to hang together between line and line, and existing paint
The coil that envelope curve turns to is coiling, therefore is hung together between line and line, it is necessary to insulating barrier, also increases thickness
Degree.
Optionally, the metal sheet upper surface and/or lower surface are accompanied by one layer and play the flexible thin of coil fixation
Film.
Optionally, the flexible thin film is the PI material membranes with gum, or PET material film, to keep coil after etching
Shape.
Optionally, the coil finished product determines according to spatial form requirement different in practical application.
Optionally, the thickness of the metal sheet is between 0.01mm~5mm.
Optionally, the base material of the metal sheet is copper, silver, aluminium, or contains any one or a few material in copper, silver, aluminium
The alloy material of material.
Figure 4 and 5,6 Wireless charging coil can be made up of Fig. 3 method, the specific implementation on Wireless charging coil
Mode may refer to, on the detailed description in foregoing Wireless charging coil preparation method, will not be repeated here.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting claim, any this area
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification, therefore the present invention
Protection domain should be defined by the scope that the claims in the present invention are defined.
Claims (12)
1. a kind of preparation method of Wireless charging coil, it is characterised in that comprise the following steps：
S1：One metal sheet is provided, if there is impurity on metal sheet surface, metal sheet is first cleaned and goes the removal of impurity；
S2：Developing process formation coil pattern is exposed in the metal sheet upper and lower surface by coil pattern to cover
Film, wherein, if two surfaces are respectively formed coil pattern mask, the coil pattern on two surfaces is symmetrical；
S3：Chemical etching is carried out to the metal sheet, metal sheet is removed and reaches the standard grade the metal in region outside circular pattern, formation is engraved
Empty wire coil plate；
S4：By cleaning again, after surface oxidation-resistant protection and plating protection processing, formed coil finished product or cut again to be formed it is single
Coil finished product；
In step s 2, when the upper and lower surface of the metal sheet is respectively formed on coil pattern mask, coil thickness
Between 2mm ~ 5mm, first carry out being chemically etched into metallic plate on a surface by the way of two-sided etch-forming in step s3
After the depth of part 1/2, on the surface, attached last layer plays the flexible thin film of coil fixation, carries out chemistry on another surface afterwards
Etching, until metal sheet upper and lower surface runs through.
2. the preparation method of Wireless charging coil as claimed in claim 1, it is characterised in that the flexible thin film is band gum
PI films, PET film, to keep etching after coil shape.
3. the preparation method of Wireless charging coil as claimed in claim 1, it is characterised in that in step s 4, the surface
The method of anti-oxidation protection includes plating electrophoretic paint, the gold-plated protective layer of nickel plating or spraying protective layer.
4. the preparation method of Wireless charging coil as claimed in claim 1, it is characterised in that in step s 4, the plating
Protection processing is used to connect to do solderability electroplating processes on the surface of conductive component for wire coil.
5. the preparation method of Wireless charging coil as claimed in claim 1, it is characterised in that the coil finished form according to
Different spatial forms is required and determined in practical application.
6. the preparation method of the Wireless charging coil as described in any one in claim 1-5, it is characterised in that the metal
The base material of plate is copper, silver, aluminium, or the alloy material containing any one or a few material in copper, silver, aluminium.
7. a kind of Wireless charging coil, it is characterised in that including a metal sheet, the metal sheet after exposure imaging by changing
The metal that the mode etched removes the exterior domain of coil pattern is learned, forms the wire coil plate of a hollow out, coil plate passes through
Clean again, after surface oxidation-resistant protection and plating protection processing, form coil finished product or cut into single coil finished product again；Its
In, when the upper and lower surface of the metal sheet is respectively formed on coil pattern mask, coil thickness 2mm ~ 5mm it
Between, after first carrying out being chemically etched into the depth of metal sheet 1/2 on a surface by the way of the two-sided etch-forming, on the surface
Attached last layer plays the flexible thin film of coil fixation, carries out chemical etching on another surface afterwards, until above and below metal sheet
Surface is run through.
8. Wireless charging coil as claimed in claim 7, it is characterised in that the metal sheet upper surface and/or lower surface
It is accompanied by one layer of flexible thin film for playing coil fixation.
9. Wireless charging coil as claimed in claim 8, it is characterised in that the flexible thin film is the PI materials with gum
Film, or PET material film, to keep the shape of coil after etching.
10. Wireless charging coil as claimed in claim 7, it is characterised in that the coil finished product according in practical application not
Same spatial form is required and determined.
11. Wireless charging coil as claimed in claim 7, it is characterised in that the thickness of the metal sheet 0.01mm~
Between 5mm.
12. the Wireless charging coil as described in any one in claim 7-11, it is characterised in that the base of the metal sheet
Material is copper, silver, aluminium, or the alloy material containing any one or a few material in copper, silver, aluminium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510829337.8A CN105304312B (en) | 2015-11-25 | 2015-11-25 | The preparation method and Wireless charging coil of a kind of Wireless charging coil |
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| CN201510829337.8A CN105304312B (en) | 2015-11-25 | 2015-11-25 | The preparation method and Wireless charging coil of a kind of Wireless charging coil |
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| CN105304312A CN105304312A (en) | 2016-02-03 |
| CN105304312B true CN105304312B (en) | 2017-11-21 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170179773A1 (en) * | 2015-12-17 | 2017-06-22 | Samsung Electro-Mechanics Co., Ltd. | Coil for wireless communications, coil module and mobile terminal using the same |
| CN107134354A (en) * | 2016-02-26 | 2017-09-05 | 苏州伊诺联客电子科技有限公司 | Wireless charging coil and preparation method thereof |
| CN107508383A (en) * | 2017-09-01 | 2017-12-22 | 清华大学 | A kind of charged media, charging device and manufacture method that can suppress eddy current effect |
| CN108511182B (en) * | 2018-03-07 | 2019-08-16 | 东莞领益精密制造科技有限公司 | Wireless charging coil stamping manufacturing process |
| CN108511183B (en) * | 2018-03-07 | 2019-06-11 | 东莞领益精密制造科技有限公司 | Manufacturing process of wireless charging coil |
| CN108806967B (en) * | 2018-06-12 | 2020-08-25 | 上海安费诺永亿通讯电子有限公司 | Manufacturing method and structure of wireless charging coil |
| CN109360729B (en) * | 2018-10-19 | 2021-03-23 | 上海安费诺永亿通讯电子有限公司 | Manufacturing method and structure of planar spiral coil |
| CN114783760B (en) * | 2022-05-30 | 2024-07-30 | 歌尔股份有限公司 | Wireless charging coil and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326473A (en) * | 2012-03-23 | 2013-09-25 | Lg伊诺特有限公司 | Wireless power receiver and method of manufacturing the same |
| CN103515698A (en) * | 2012-06-28 | 2014-01-15 | 比亚迪股份有限公司 | NFC (Near Field Communication) antenna and electronic equipment |
| CN204066972U (en) * | 2014-08-11 | 2014-12-31 | 介面光电股份有限公司 | Thin film coil, thin film coil assembly and charging device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI126157B (en) * | 2013-10-22 | 2016-07-15 | Elcoflex Oy | Wireless charging arrangement |
-
2015
- 2015-11-25 CN CN201510829337.8A patent/CN105304312B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326473A (en) * | 2012-03-23 | 2013-09-25 | Lg伊诺特有限公司 | Wireless power receiver and method of manufacturing the same |
| CN103515698A (en) * | 2012-06-28 | 2014-01-15 | 比亚迪股份有限公司 | NFC (Near Field Communication) antenna and electronic equipment |
| CN204066972U (en) * | 2014-08-11 | 2014-12-31 | 介面光电股份有限公司 | Thin film coil, thin film coil assembly and charging device |
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