CN107068357A - A kind of induction coil structure and preparation method for wireless charging device - Google Patents
A kind of induction coil structure and preparation method for wireless charging device Download PDFInfo
- Publication number
- CN107068357A CN107068357A CN201710452289.4A CN201710452289A CN107068357A CN 107068357 A CN107068357 A CN 107068357A CN 201710452289 A CN201710452289 A CN 201710452289A CN 107068357 A CN107068357 A CN 107068357A
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- Prior art keywords
- wire
- wireless charging
- induction coil
- charging device
- slit
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2871—Pancake coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of induction coil structure for wireless charging device, it includes wire, and the wire coiling forms coil, and the surface of the wire offers slit, length direction extension of the slit along wire.In induction coil structure disclosed by the invention, because the surface of wire offers slit, in the presence of slit so that wire is by the parallel connection that a line equivalent is two lines road, based on the architectural characteristic, invention increases the circulation area of conductive line surfaces electric current, the horizontal area of wire fluting side is reduced, so that the influence of Kelvin effect is reduced, while reducing vortes interference of the transmitting coil to receiving coil, operating efficiency is effectively increased, and reduces the temperature rise of coil.
Description
Technical field
The present invention relates to the transmitting of wireless charging device or receiving coil, more particularly to it is a kind of for wireless charging device
Induction coil structure and preparation method.
Background technology
At present, it is that mobile phone increases wireless charging function by increasing with the fast development in wireless charging market
Concern, is efficiency, heating and thickness the problem of overriding concern, because mobile phone is to zero during mobile phone wireless charging is realized
Part thickness has very harsh requirement, so RX Coil devices are all realized in mobile phone application using FPCB, traditional FPCB
Coil structures referring to Fig.1 and 2, form coiled type by the coiling of wire 100, the surface of wherein wire 100 be it is smooth, according to
Kelvin effect principle：When wire is by alternating current, because the inside of wire is different with the magnetic flux that marginal portion is interlinked, cause
Electric current in conductive line surfaces produces uneven distribution, is reduced equivalent to wire effective cross-section, thus exist energy transmission efficiency it is low,
The defects such as temperature rise height.
The content of the invention
The technical problem to be solved in the present invention is, can reduce Kelvin effect there is provided one kind in view of the shortcomings of the prior art
Influence, and then improve operating efficiency and reduction coil temperature rise for the induction coil structure of wireless charging device and preparation side
Method.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that.
A kind of induction coil structure for wireless charging device, it includes wire, and the wire coiling forms coil,
The surface of the wire offers slit, length direction extension of the slit along wire.
Preferably, the wire is copper cash.
Preferably, the wire is flat wire, and the width of the wire is 1mm, and thickness is 45um.
Preferably, the quantity of the wire is two, and two wires turn to double-layer coil.
Preferably, the width of the slit is 0.1mm.
Preferably, the wire coiling 10 is enclosed and forms coil.
A kind of preparation method of induction coil structure for wireless charging device, it comprises the following steps：Step S1 is accurate
Standby wire, the surface of the wire offers slit, length direction extension of the slit along wire；Step S2, leads described
Line coiling forms coil.
Preferably, the wire is flat wire, and the width of the wire is 1mm, and thickness is 45um, the slit
Width be 0.1mm.
Preferably, the quantity of the wire is two, in the step S2, and two wires are turned into double-layer coil.
Preferably, during the wire is copper cash, the step S2, the wire coiling 10 is enclosed and coil is formed.
In the induction coil structure of wireless charging device disclosed by the invention, because the surface of wire offers slit,
In the presence of slit so that wire is by the parallel connection that a line equivalent is two lines road, based on the architectural characteristic, present invention increase
The circulation areas of conductive line surfaces electric currents, reduces wire and slots the horizontal area of side, so that the influence of Kelvin effect is reduced,
Vortes interference of the transmitting coil to receiving coil is reduced simultaneously, operating efficiency is effectively increased, and reduce the temperature of coil
Rise.
Brief description of the drawings
Fig. 1 is induction coil configuration figure in the prior art.
Fig. 2 is the enlarged drawing of part A in Fig. 1.
Fig. 3 is induction coil configuration figure of the present invention.
Fig. 4 is the enlarged drawing of part B in Fig. 3.
Embodiment
The present invention is described in more detail with reference to the accompanying drawings and examples.
The invention discloses a kind of induction coil structure for wireless charging device, with reference to shown in Fig. 3 and Fig. 4, it is wrapped
Wire 1 is included, the coiling of wire 1 forms coil, the surface of the wire 1 offers slit 2, the slit 2 is along wire 1
Length direction extends.
In the induction coil structure of above-mentioned wireless charging device, because the surface of wire 1 offers slit 2, in slit 2
Under effect so that wire 1 is by the parallel connection that a line equivalent is two lines road, and based on the architectural characteristic, invention increases lead
The circulation area of the surface current of line 1, reduces the horizontal area of the fluting of wire 1 side, so as to reduce the influence of Kelvin effect, together
When reduce vortes interference of the transmitting coil to receiving coil, effectively increase operating efficiency, and reduce the temperature rise of coil.
Further, the wire 1 is copper cash.
In the present embodiment, the wire 1 is flat wire, and the width of the wire 1 is 1mm, and thickness is 45um.Enter
One step, in addition to 4 layers of magnetic sheet material nano crystalline substance, its thickness is 1mm.
As a kind of preferred embodiment, the quantity of the wire 1 is two, and two wires 1 turn to double-layer coil.
In the present embodiment, the width of the slit 2 is 0.1mm.Specifically, the slit 2 is located at the surface of wire 1
Middle.
Further, the coiling 10 of wire 1 is enclosed and forms coil.
In order to which technical scheme is better described, the invention also discloses a kind of preparation side of induction coil structure
Method, this method comprises the following steps：
Step S1, prepares wire 1, the surface of the wire 1 offers slit 2, length side of the slit 2 along wire 1
To extension；
Step S2, coil is formed by the coiling of wire 1.
In the above method, the wire 1 is flat wire, and the width of the wire 1 is 1mm, and thickness is 45um, institute
The width for stating slit 2 is 0.1mm.
Further, the quantity of the wire 1 is two, in the step S2, and two wires 1 are turned into double-deck line
Circle.
In the present embodiment, the wire 1 is copper cash, in the step S2, and the coiling 10 of wire 1 is enclosed and line is formed
Circle.
The induction coil structure prepared using the above method, it is as follows with the efficiency of conventional coil and temperature rise test：
Sample a is traditional induction coil structure, wherein, FPCB coil-windings 10 are enclosed, using double-deck coiling, copper wires
Wide 1mm, copper wires thickness is 45um, 4 thickness degree 1mm of magnetic sheet material nano crystalline substance；
Sample b is induction coil structure of the present invention, wherein, FPCB coil-windings 10 are enclosed, using double-deck coiling, copper wires
Wide 1mm, the middle on its surface opens up slit, and the width of slit is 0.1mm, and copper wires thickness is 45um, and magnetic sheet material is received
The brilliant 4 thickness degree 1mm of rice.
Sample a and sample b parameter is：
| 100K/2V | Sample a | Sample b |
| Ls(uH) | 7.16 | 7.16 |
| Rs(mΩ) | 374 | 376 |
| Q | 12.0 | 11.67 |
Efficiency test platform is：Tx P9242Demo+RX P9221Demo, show, sample b efficiency is bright by efficiency test
It is aobvious to be higher by 1%~2% than sample a；
Temperature rise test platform is：Tx P9242Demo+RX P9221Demo, draw, sample b temperature rise through overtemperature test
It is lower than sample a 2 DEG C.
Induction coil structure and preparation method disclosed by the invention for wireless charging device, can by actual test
Draw, the present invention can effectively improve the efficiency and reduction coil temperature rise of wireless charging, be suitably applied wireless charging system
In, and preferably application experience can be brought.
Simply preferred embodiments of the present invention described above, are not intended to limit the invention, all technology models in the present invention
Interior done modification, equivalent substitution or improvement etc. are enclosed, be should be included in the range of of the invention protect.
Claims (10)
1. a kind of induction coil structure for wireless charging device, it is characterised in that include wire (1), the wire (1)
Coiling forms coil, and the surface of the wire (1) offers slit (2), and length direction of the slit (2) along wire (1) prolongs
Stretch.
2. it is used for the induction coil structure of wireless charging device as claimed in claim 1, it is characterised in that the wire (1)
For copper cash.
3. it is used for the induction coil structure of wireless charging device as claimed in claim 1, it is characterised in that the wire (1)
For flat wire, and the width of the wire (1) is 1mm, and thickness is 45um.
4. it is used for the induction coil structure of wireless charging device as claimed in claim 1, it is characterised in that the wire (1)
Quantity be two, two wires (1) turn to double-layer coil.
5. it is used for the induction coil structure of wireless charging device as claimed in claim 1, it is characterised in that the slit (2)
Width be 0.1mm.
6. it is used for the induction coil structure of wireless charging device as claimed in claim 1, it is characterised in that the wire (1)
Coiling 10 is enclosed and forms coil.
7. the preparation method of a kind of induction coil structure for wireless charging device, it is characterised in that comprise the following steps：
Step S1, prepares wire (1), and the surface of the wire (1) offers slit (2), and the slit (2) is along wire (1)
Length direction extends；
Step S2, coil is formed by the wire (1) coiling.
8. it is used for the preparation method of the induction coil structure of wireless charging device as claimed in claim 7, it is characterised in that institute
State in step S1, the wire (1) is flat wire, and the width of the wire (1) is 1mm, and thickness is 45um, described narrow
The width of groove (2) is 0.1mm.
9. it is used for the preparation method of the induction coil structure of wireless charging device as claimed in claim 7, it is characterised in that institute
State in step S1, the quantity of the wire (1) is two, in the step S2, two wires (1) are turned into double-layer coil.
10. it is used for the preparation method of the induction coil structure of wireless charging device as claimed in claim 7, it is characterised in that
The wire (1) is copper cash, in the step S2, and the wire (1) coiling 10 is enclosed and coil is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710452289.4A CN107068357A (en) | 2017-06-15 | 2017-06-15 | A kind of induction coil structure and preparation method for wireless charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710452289.4A CN107068357A (en) | 2017-06-15 | 2017-06-15 | A kind of induction coil structure and preparation method for wireless charging device |
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| CN107068357A true CN107068357A (en) | 2017-08-18 |
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| CN201710452289.4A Pending CN107068357A (en) | 2017-06-15 | 2017-06-15 | A kind of induction coil structure and preparation method for wireless charging device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785163A (en) * | 2017-09-28 | 2018-03-09 | 东莞市松研智达工业设计有限公司 | Wireless charging coil outlet winds complete machine |
| CN107819362A (en) * | 2017-11-24 | 2018-03-20 | 深圳顺络电子股份有限公司 | A kind of wireless charging electric wire coil assembly |
| CN108270078A (en) * | 2018-01-29 | 2018-07-10 | 上海竹路电子科技有限公司 | A kind of high efficiency wireless charging reception antenna |
| CN108321914A (en) * | 2017-11-20 | 2018-07-24 | 华为技术有限公司 | A kind of coil and wireless charging receiver, with emitter and system |
| CN109552086A (en) * | 2018-12-18 | 2019-04-02 | 深圳市信维通信股份有限公司 | A kind of wireless charging system for electric automobile and its control method |
| WO2020173097A1 (en) * | 2019-02-28 | 2020-09-03 | 华为技术有限公司 | Coil module, wireless charging transmitting device, wireless charging receiving device, wireless charging system, and mobile terminal |
| CN111627677A (en) * | 2020-05-22 | 2020-09-04 | 北京小米移动软件有限公司 | Wireless charging coil, wireless charging device and winding method of wireless charging coil |
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| CN202332524U (en) * | 2011-12-05 | 2012-07-11 | 保定天威集团有限公司 | Coil structure capable of reducing hot-point temperature rise of transformer |
| JP4974992B2 (en) * | 2008-09-30 | 2012-07-11 | 三菱電機株式会社 | Sorashin reactor |
| TW201320121A (en) * | 2011-09-30 | 2013-05-16 | Panasonic Corp | Planar coil, coil module including planar coil, power receiving device including planar coil, and contactless electric power transmission apparatus including planar coil |
| CN205487610U (en) * | 2016-04-01 | 2016-08-17 | 深圳市京泉华科技股份有限公司 | Inductor |
| CN206758245U (en) * | 2017-06-15 | 2017-12-15 | 深圳市信维通信股份有限公司 | A kind of induction coil structure for wireless charging device |
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Patent Citations (5)
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| JP4974992B2 (en) * | 2008-09-30 | 2012-07-11 | 三菱電機株式会社 | Sorashin reactor |
| TW201320121A (en) * | 2011-09-30 | 2013-05-16 | Panasonic Corp | Planar coil, coil module including planar coil, power receiving device including planar coil, and contactless electric power transmission apparatus including planar coil |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107785163A (en) * | 2017-09-28 | 2018-03-09 | 东莞市松研智达工业设计有限公司 | Wireless charging coil outlet winds complete machine |
| CN107785163B (en) * | 2017-09-28 | 2020-04-14 | 宁波大桔科技有限公司 | Wireless charging coil outlet winding machine |
| CN108321914A (en) * | 2017-11-20 | 2018-07-24 | 华为技术有限公司 | A kind of coil and wireless charging receiver, with emitter and system |
| WO2019096321A1 (en) * | 2017-11-20 | 2019-05-23 | 华为技术有限公司 | Coil, wireless charging receiving device, wireless charging transmitting device and wireless charging system |
| CN108321914B (en) * | 2017-11-20 | 2022-04-05 | 华为技术有限公司 | Coil, wireless charging receiving device, transmitting device and system |
| US11916399B2 (en) | 2017-11-20 | 2024-02-27 | Huawei Technologies Co., Ltd. | Coil, wireless charging receiving apparatus, wireless charging transmission apparatus, and system |
| CN107819362A (en) * | 2017-11-24 | 2018-03-20 | 深圳顺络电子股份有限公司 | A kind of wireless charging electric wire coil assembly |
| CN108270078A (en) * | 2018-01-29 | 2018-07-10 | 上海竹路电子科技有限公司 | A kind of high efficiency wireless charging reception antenna |
| CN109552086A (en) * | 2018-12-18 | 2019-04-02 | 深圳市信维通信股份有限公司 | A kind of wireless charging system for electric automobile and its control method |
| CN109552086B (en) * | 2018-12-18 | 2024-03-19 | 深圳市信维通信股份有限公司 | Wireless charging system of electric automobile and control method thereof |
| WO2020173097A1 (en) * | 2019-02-28 | 2020-09-03 | 华为技术有限公司 | Coil module, wireless charging transmitting device, wireless charging receiving device, wireless charging system, and mobile terminal |
| US11978583B2 (en) | 2019-02-28 | 2024-05-07 | Huawei Technologies Co., Ltd. | Coil module, wireless charging transmitting apparatus, wireless charging receiving apparatus, wireless charging system, and mobile terminal |
| CN111627677A (en) * | 2020-05-22 | 2020-09-04 | 北京小米移动软件有限公司 | Wireless charging coil, wireless charging device and winding method of wireless charging coil |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170818 |
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| RJ01 | Rejection of invention patent application after publication |