CN109462973A - A kind of magnetic field shielding piece and its manufacturing method - Google Patents
A kind of magnetic field shielding piece and its manufacturing method Download PDFInfo
- Publication number
- CN109462973A CN109462973A CN201810865785.7A CN201810865785A CN109462973A CN 109462973 A CN109462973 A CN 109462973A CN 201810865785 A CN201810865785 A CN 201810865785A CN 109462973 A CN109462973 A CN 109462973A
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- Prior art keywords
- piece
- magnetic
- magnetic field
- field shielding
- fractionlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000012790 adhesive layer Substances 0.000 claims abstract description 48
- 239000011241 protective layer Substances 0.000 claims abstract description 44
- 230000001681 protective effect Effects 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims description 11
- 238000013467 fragmentation Methods 0.000 claims description 9
- 238000006062 fragmentation reaction Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 6
- 239000012782 phase change material Substances 0.000 claims description 5
- 229910000889 permalloy Inorganic materials 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 2
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 2
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 2
- 238000005234 chemical deposition Methods 0.000 claims description 2
- 238000005229 chemical vapour deposition Methods 0.000 claims description 2
- 238000007766 curtain coating Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 238000007731 hot pressing Methods 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 238000005289 physical deposition Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 229920000052 poly(p-xylylene) Polymers 0.000 claims description 2
- 239000005060 rubber Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 3
- 238000005516 engineering process Methods 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000002390 adhesive tape Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- -1 curtain coating Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention relates to a kind of magnetic field shielding pieces, it includes thin plate magnetic piece, protective film and the first adhesive layer, the magnetic piece is divided into multiple fractionlets, it is formed and is had the gap between each adjacent fractionlet, the protective film is bonded in magnetic piece one side by the first adhesive layer, the magnetic field shielding piece further includes the protective layer being formed in magnetic piece another side, it is at least partly filled by least one of first adhesive layer and the protective layer in the gap of the magnetic piece, promote mutually insulated between fractionlet, the protective layer provides fixed and protection function to each fractionlet, prevent fractionlet from shifting, improve the locating effect of fractionlet；Protective layer has thermally conductive function, is conducive to the heat derives of coil reducing the heat of coil in use；Protective layer has heat accumulation function, helps the heat for absorbing at least partly coil, reduces temperature rise, improves the application function of magnetic field shielding piece.
Description
Technical field
The present invention relates to a kind of wireless charging technical field more particularly to a kind of magnetic field shielding piece and its manufacturing methods.
Background technique
Existing wireless charging device is realized using the electromagnetic induction of coil, in coil galvanization, line
Circle and permeability magnetic material can generate heat, or even can bring the element senses heating of coil peripherals, may cause fatal influence, to understand
The certainly above problem, the coil back side use the shielding piece of the magnetic substances such as amorphous band, ferrite and the polymer sheet comprising magnetic powder more,
Magnetic conduction is provided or every magnetic function, realization shields coil bring magnetic flux, for shielding material, it is desirable that magnetic conductivity is high,
It is high to be saturated magnetic strength, eddy-current loss is low, and is processed into various shape conveniently with matched coil.
The prior art relevant to this case can be with reference to a kind of wireless charging of Chinese Patent No. CN104011814B exposure
Electric appliance magnetic field shielding piece comprising a thin plate magnetic piece, a protective film, one first adhesive layer and a double faced adhesive tape, thin plate magnetic
Property piece has handled by fragmentation after be divided into multiple fractionlets, protective film is bonded in a table of magnetic piece by the first adhesive layer
Face, the two sides of double faced adhesive tape are respectively provided with the second adhesive layer, and double faced adhesive tape is bonded in the another of magnetic piece by one second adhesive layer
One surface, the gap between fractionlet are filled by the first, second adhesive layer, promote mutually insulated between each fractionlet.Due to viscous
Knot layer is thick, loose shape, and fractionlet is easy to happen displacement, and the poor heat-conducting effect of locating effect is poor, and in use process
Adhesive layer heat absorption causes binding material viscosity to reduce even decomposition, may affect the application function for leading to shield piece.
Summary of the invention
The object of the present invention is to provide a kind of magnetic field shielding pieces and its manufacturing method for improving application function.
To realize foregoing purpose, the present invention adopts the following technical scheme: a kind of magnetic field shielding piece comprising thin plate is magnetic
Piece, protective film and the first adhesive layer, the magnetic piece are divided into multiple fractionlets, are formed between each adjacent fractionlet seamed
Gap, the protective film are bonded in magnetic piece one side by the first adhesive layer, and the magnetic field shielding piece further includes being formed in magnetism
The protective layer of piece another side, the gap of the magnetic piece by least one of the first adhesive layer and protective layer at least partly
Filling, promotes mutually insulated between fractionlet.
The present invention also adopts the following technical scheme that a kind of manufacturing method of magnetic field shielding piece comprising the steps of:
Thin plate magnetic piece is provided；
Protective film and the first adhesive layer are provided, protective film is bonded in magnetic piece one side by first adhesive layer；
Protective layer is formed in magnetic piece another side；And
Apply fragmentation processing, magnetic piece is divided into several fractionlets, has gap between fractionlet, the gap is glued by first
At least one of knot layer and protective layer are at least partly filled, and mutually insulated between fractionlet is made.
The present invention also adopts the following technical scheme that a kind of manufacturing method of magnetic field shielding piece comprising the steps of:
Magnetic piece, protective film and the first adhesive layer are provided, protective film is bonded in magnetic piece one side by first adhesive layer；
Apply fragmentation processing and magnetic piece is divided into several fractionlets, there is gap between fractionlet；And
Protective layer is formed in magnetic piece another side, the gap is by least one of the first adhesive layer and protective layer at least portion
Divide ground filling, makes mutually insulated between fractionlet.
Magnetic field shielding piece of the present invention forms protective layer in magnetic piece another side, and protective layer is provided fixed and protected to each fractionlet
The function of shield, prevents fractionlet from shifting, and improves the locating effect of fractionlet；Protective layer has thermally conductive function, is conducive to coil
Heat derives, reduce the heat release of coil；Protective layer has heat accumulation function, helps the heat for absorbing at least partly coil, reduces
Temperature rise further improves the application function of magnetic field shielding piece.
Detailed description of the invention
Fig. 1 is the schematic cross-section of magnetic field shielding piece of the present invention.
Specific embodiment
Refering to Figure 1, being used for wireless charging product comprising thin plate the invention discloses a kind of magnetic field shielding piece 10
Magnetic piece 11, protective film 12, the first adhesive layer 13, protective layer 14 and the second adhesive layer 15.
Magnetic piece 11 forms shape by amorphous alloy, nanometer crystal alloy, permalloy piece, molybdenum permalloy piece or ferrite
At, and cut by transverse roller or after at least one of lateral roll-in mode carries out fragmentation processing, be divided into multiple small
Fragment 111, size, the shape of fractionlet 111 can be identical or different, are formed between adjacent fractionlet 111 and have the gap 112.
Protective film 12 is one of PET, PE, OPP, PVC, CPP or BOPP film.Protective film 12 passes through the first adhesive layer 13
It is bonded in the wherein one side of magnetic piece 11.
Protective layer 14 is formed in the another side of magnetic piece 11, and thickness control between 0.1 nm -1.0 mm, adopt by protective layer 14
With rubber, plastics, resin, silica (SIO2), aluminium oxide (AL2O3), phase-change material, Parylene film or by phase-change material with
The composite layer etc. that resin is combined by predetermined ratio.The manufacture craft of protective layer 14 can use spraying, brushing, immersion liquid, curtain coating, gas
As physical deposition, meteorological chemical deposition or vapor deposition etc..
Wherein, it is formed with covering by phase-change material and resin-bonded when the coil back side of a certain wireless charging device does not cover
The composite layer when, coil working frequency is 100K-150KHZ, in the case of inductance is 5-15uh, number that temperature test obtains
It is as follows according to comparing:
| Composite layer is not covered | Cover composite layer | |
| Testing temperature (DEG C) is put in insulating box | 44.6 | 42.5 |
| Air themperature (DEG C) in insulating box | 25.9 | 25.75 |
| Point temperature and Air Temperature Difference (DEG C) | 18.7 | 16.75 |
Refering to above table, it is known that reducing the temperature in insulating box, i.e. charge coil periphery after increasing the composite layer
Temperature, the temperature that coil shields piece 10 during the charging process can be reduced, keep Temperature Distribution more uniform.
When the first adhesive layer 13 is bonded in magnetic piece 11 prior to protective layer 14, if the gap 112 of magnetic piece 11 not by
First adhesive layer 13 is filled up completely, and protective layer 14 can be packed into gap 112, further fills in gap 112 completely, conversely, protecting
Sheath 14 will not be packed into gap 112.
Similarly, when protective layer 14 is formed in magnetic piece 11 prior to the first adhesive layer 13, if the gap 112 of magnetic piece 11
Unprotected layer 14 is filled up completely, and the first adhesive layer 13 can be packed into gap 112, further fills in gap 112 completely, conversely,
First adhesive layer 13 will not be packed into gap 112.
Since gap 112 is at least partly filled by the first adhesive layer 13 or protective layer 14, so that between each fractionlet 111
Mutually insulated.
Second adhesive layer 15 is to have substrate double faced adhesive tape, without substrate double-sided adhesive or the two-sided glue film of hot pressing, the second adhesive layer 15
It is bonded on protective layer 14, protective layer 14 is between magnetic piece 11 and the second adhesive layer 15.
The one side of the magnetic piece 11 of magnetic field shielding piece 10 of the present invention bonds protective film 12 by the first adhesive layer 13, another
Protective layer 14 is formed on face, between magnetic piece 11 and the second adhesive layer 15, protective layer 14 is filled or unfilled with protective layer 14
Enter the gap 112 of magnetic piece 11, increases setting protective layer 14, have the advantages that
1. protective layer 14 provides fixed and protection function to each fractionlet 111, prevents fractionlet 111 from shifting, improve fractionlet
111 locating effect；
2. protective layer 14 has thermally conductive function, be conducive to the heat release that the heat derives of coil are reduced to coil, improve magnetic field screen
Cover the application function of piece；
3. protective layer 14 has heat accumulation function, the heat of absorbing coil is helped, temperature rise is reduced, further improves magnetic field shielding piece
Application function.
The present invention also discloses the manufacturing method of two kinds of magnetic field shielding pieces 10, the manufacturer of one of magnetic field shielding piece 10
Method comprises the following steps:
Thin plate magnetic piece is provided；
Protective film and the first adhesive layer are provided, protective film is bonded in magnetic piece one side by the first adhesive layer；
Protective layer is formed in magnetic piece another side；And
Apply fragmentation processing, magnetic piece is divided into several fractionlets, is formed and had the gap between fractionlet, the first adhesive layer and guarantor
At least one of sheath at least partly blind, makes fractionlet mutually insulated.
The manufacturing method of another magnetic field shielding piece 10, comprises the following steps:
Magnetic piece, protective film and the first adhesive layer are provided, protective film is bonded in magnetic piece one side by first adhesive layer；
Apply fragmentation processing and magnetic piece is divided into several fractionlets, there is gap between fractionlet；And
Protective layer is formed in magnetic piece another side, at least one of the first adhesive layer and protective layer at least partly filling irrigating sealant
Gap makes fractionlet mutually insulated.
Although for illustrative purposes, the preferred embodiment of the present invention is had been disclosed, but the ordinary skill people of this field
Member will realize without departing from the scope and spirit of the invention as disclosed by the appended claims, various to change
Into, increase and replace be possible.
Claims (12)
1. a kind of magnetic field shielding piece comprising thin plate magnetic piece, protective film and the first adhesive layer, the magnetic piece are divided into more
A fractionlet is formed between each adjacent fractionlet and is had the gap, and the protective film is bonded in magnetic piece one side by the first adhesive layer,
It is characterized by: the magnetic field shielding piece further includes the protective layer being formed in magnetic piece another side, the gap of the magnetic piece
It is at least partly filled by least one of the first adhesive layer and protective layer, promotes mutually insulated between fractionlet.
2. magnetic field shielding piece according to claim 1, it is characterised in that: the magnetic field shielding piece further includes the second bonding
Layer, the second adhesive layer bonding is on the protection layer.
3. magnetic field shielding piece according to claim 2, it is characterised in that: second adhesive layer is to have substrate double-sided adhesive
Band, without substrate double-sided adhesive or the two-sided glue film of hot pressing.
4. magnetic field shielding piece according to claim 1, it is characterised in that: the protective layer with a thickness of 0.1 nm -1.0
mm。
5. magnetic field shielding piece according to claim 1, it is characterised in that: the protective layer using rubber, plastics, resin,
Silica, aluminium oxide, phase-change material, Parylene film or phase-change material are with resin by the composite layer in conjunction with predetermined ratio.
6. magnetic field shielding piece according to claim 1, it is characterised in that: the protective layer using spraying, brush, curtain coating,
Immersion liquid, meteorological physical deposition, meteorological chemical deposition or vapor deposition technology mode formed.
7. magnetic field shielding piece according to claim 1, it is characterised in that: size, the shape of the fractionlet are identical or not
Together.
8. magnetic field shielding piece according to claim 1, it is characterised in that: the magnetic piece is by amorphous alloy, nanocrystalline conjunction
Gold, permalloy piece, molybdenum permalloy piece or ferrite are formed.
9. magnetic field shielding piece according to claim 1, it is characterised in that: the magnetic piece be cut by transverse roller and laterally
After at least one mode of roll-in carries out fragmentation processing, it is divided into multiple fractionlets.
10. magnetic field shielding piece according to claim 1, it is characterised in that: the protective film be PET, PE, OPP, PVC,
One of CPP or BOPP film.
11. a kind of manufacturing method of magnetic field shielding piece comprising the steps of:
Thin plate magnetic piece is provided；
Protective film and the first adhesive layer are provided, protective film is bonded in magnetic piece one side by first adhesive layer；
Protective layer is formed in magnetic piece another side；And
Apply fragmentation processing, magnetic piece is divided into several fractionlets, is formed and had the gap between the fractionlet, the gap quilt
At least one of first adhesive layer and protective layer are at least partly filled, and mutually insulated between fractionlet is made.
12. a kind of manufacturing method of magnetic field shielding piece comprising the steps of:
Magnetic piece, protective film and the first adhesive layer are provided, protective film is bonded in magnetic piece one side by first adhesive layer；
Apply fragmentation processing and magnetic piece is divided into several fractionlets, there is gap between fractionlet；And
Protective layer is formed in magnetic piece another side, the gap is by least one of the first adhesive layer and protective layer at least portion
Divide ground filling, makes mutually insulated between fractionlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810865785.7A CN109462973B (en) | 2018-08-01 | 2018-08-01 | Magnetic field shielding sheet and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810865785.7A CN109462973B (en) | 2018-08-01 | 2018-08-01 | Magnetic field shielding sheet and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109462973A true CN109462973A (en) | 2019-03-12 |
| CN109462973B CN109462973B (en) | 2024-05-17 |
Family
ID=65606346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810865785.7A Active CN109462973B (en) | 2018-08-01 | 2018-08-01 | Magnetic field shielding sheet and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109462973B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431239A (en) * | 2020-04-20 | 2020-07-17 | 蓝沛光线（上海）电子科技有限公司 | Wireless charging module and preparation method thereof |
| US20200373073A1 (en) * | 2019-05-23 | 2020-11-26 | Kunshan Liantao Electronic Co., Ltd | Wireless charging module and manufacturing method thereof |
| CN113573563A (en) * | 2021-07-26 | 2021-10-29 | 横店集团东磁股份有限公司 | Composite magnetic shielding structure for wireless charging and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011814A (en) * | 2011-12-21 | 2014-08-27 | 阿莫先恩电子电器有限公司 | Magnetic field shielding sheet for a wireless charger, method for manufacturing same, and receiving apparatus for a wireless charger using the sheet |
| CN104972709A (en) * | 2014-04-10 | 2015-10-14 | 苏州驭奇材料科技有限公司 | High-heat-dissipation wave-absorbing composite film and manufacturing method thereof |
| CN106170198A (en) * | 2015-05-22 | 2016-11-30 | 三星电机株式会社 | For shielding the sheet of electromagnetic wave |
| CN108235676A (en) * | 2018-03-13 | 2018-06-29 | 蓝沛光线（上海）电子科技有限公司 | A kind of preparation process and shielding piece of wireless charging application shielding piece |
| US20180198305A1 (en) * | 2015-07-20 | 2018-07-12 | Amosense Co., Ltd. | Magnetic Field Shielding Unit |
| CN208768367U (en) * | 2018-08-01 | 2019-04-19 | 昆山联滔电子有限公司 | A kind of magnetic field shielding piece |
-
2018
- 2018-08-01 CN CN201810865785.7A patent/CN109462973B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104011814A (en) * | 2011-12-21 | 2014-08-27 | 阿莫先恩电子电器有限公司 | Magnetic field shielding sheet for a wireless charger, method for manufacturing same, and receiving apparatus for a wireless charger using the sheet |
| CN104972709A (en) * | 2014-04-10 | 2015-10-14 | 苏州驭奇材料科技有限公司 | High-heat-dissipation wave-absorbing composite film and manufacturing method thereof |
| CN106170198A (en) * | 2015-05-22 | 2016-11-30 | 三星电机株式会社 | For shielding the sheet of electromagnetic wave |
| US20180198305A1 (en) * | 2015-07-20 | 2018-07-12 | Amosense Co., Ltd. | Magnetic Field Shielding Unit |
| CN108235676A (en) * | 2018-03-13 | 2018-06-29 | 蓝沛光线（上海）电子科技有限公司 | A kind of preparation process and shielding piece of wireless charging application shielding piece |
| CN208768367U (en) * | 2018-08-01 | 2019-04-19 | 昆山联滔电子有限公司 | A kind of magnetic field shielding piece |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200373073A1 (en) * | 2019-05-23 | 2020-11-26 | Kunshan Liantao Electronic Co., Ltd | Wireless charging module and manufacturing method thereof |
| US20230047913A1 (en) * | 2019-05-23 | 2023-02-16 | Kunshan Liantao Electronic Co., Ltd | Manufacturing method of wireless charging module |
| CN111431239A (en) * | 2020-04-20 | 2020-07-17 | 蓝沛光线（上海）电子科技有限公司 | Wireless charging module and preparation method thereof |
| CN113573563A (en) * | 2021-07-26 | 2021-10-29 | 横店集团东磁股份有限公司 | Composite magnetic shielding structure for wireless charging and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109462973B (en) | 2024-05-17 |
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