CN108235676A - A kind of preparation process and shielding piece of wireless charging application shielding piece - Google Patents
A kind of preparation process and shielding piece of wireless charging application shielding piece Download PDFInfo
- Publication number
- CN108235676A CN108235676A CN201810206457.6A CN201810206457A CN108235676A CN 108235676 A CN108235676 A CN 108235676A CN 201810206457 A CN201810206457 A CN 201810206457A CN 108235676 A CN108235676 A CN 108235676A
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- layer
- wireless charging
- shielding piece
- shielded layer
- base material
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
-
- 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
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
Abstract
The invention discloses a kind of preparation process of wireless charging application shielding piece, the wireless charging application shielding piece includes at least one layer of shielded layer being longitudinally superimposed, and every layer of shielded layer is formed by least a piece of soft magnetism screen unit is horizontally-spliced, including：Soft magnetic materials is selected, the soft magnetic materials is sequentially wound and is heat-treated, obtains base material of the tool there are two exposed surface；Double faced adhesive tape is pasted in one of exposed surface of base material, and using energy wire cutting harmony wave concussion with reference to mode another exposed surface of the base material is cut and is shaken, the base material to be resolved into the shred of several uniform shapes and certain size, so as to obtain a piece of soft magnetism screen unit.The invention also discloses a kind of applications of wireless charging to shield piece, including：At least one layer of shielded layer；Colloid protective film；PET film.Disclosed by the invention preparation is simple, and shielding piece thickness is thin, the good charge efficiency height of screening ability, the operation is stable, process and material cost is greatly saved.
Description
Technical field
The present invention relates to wireless charging and electromangnetic spectrum field, it is more particularly related to a kind of wireless charging
The preparation process of electricity application shielding piece.The invention further relates to a kind of wireless charging application shielding pieces.
Background technology
With the scientific and technical high speed development of epoch progress, the work and life of people rely increasingly upon electronics and set
It is standby.Walk in the street almost everyone seeing the mobile phone or using other electronic equipments, many people can encounter battery capacity
Feel not enough to use and be unwilling to hold bulky charger baby again, if there is that can be realized whenever and wherever possible as mobile phone signal
Charging, this is how well, does not need to cumbersome data line charging more.Although also not realizing to walk freely to charge whenever and wherever possible in the street,
But new wireless charging technology arises.
Wireless charging technology, English name are Wireless charging technology, also known as induction charging, non-
Contact charges, and is derived from a kind of New-type charge technology of wireless power conveying technology generation.Wireless charging technology utilizes near field
Sensing, being transmitted its energy to by wireless charger needs charging equipment, which is charged the battery using the energy received,
And provide energy for the running of equipment in itself.Due to transmitting energy by inductive coupling between wireless charger and charging equipment
Amount, there is no need to electric wire connections.
Wireless charging technical principle, the alternating current of primary coil certain frequency are produced by electromagnetic induction in secondary coil
Raw certain electric current, so as to which energy is transferred to receiving terminal from transmission end.Presently the most common charging solution just uses
Electromagnetic induction, in fact, electromagnetic induction solution has no too many mystique, China domestic BYD in technology realization
Company early in the non-contact induction type charger patent of in December, 2005 application, has just used electromagnetic induction technology, and existing three
Star, apple all add in wireless charging field.Plant capacity is generally worn by as 1-3W, smart mobile phone platen power is 5-10W, is taken down notes
This computer and electric tool power are 30-150W, and intelligent appliance power is 200-2KW
There are five types of the wireless charging standards of mainstream technology mainstream:Qi standards, Power Matters Alliance (PMA) marks
Standard, Alliance for Wireless Power (A4WP) standard, iNPOFi technologies, Wi-Po technologies.Form three at present
Larger alliance organization WPC, A4WP of a influence power and PMA.Respectively possess the up to dozens or even hundreds of company of member.Wherein
WPC and PMA is dedicated near radio charging technique, the familiar mobile phone wireless charging such as us.And the technology of A4WP is determined
Position is in remote-wireless energy transmission, it is desirable to be able to realize tens centimetres even transmission range of several meters of grades.
Wireless charging technology developed recently is rapid, has been widely applied to intelligent wearable device (wrist-watch), intelligence at present
The fields such as mobile phone plane plate, radio telephone, electric vehicle.But many technical barriers, such as charge efficiency are also encountered in evolution
It is low, of high cost, charging limitation it is larger.
Alternating electromagnetic field can be generated during wireless charging, and when alternating electromagnetic field encounters metal, can generate electronics is vortexed,
Thermal energy is generated on metal, causes efficiency of transmission relatively low, waste of energy, if rechargeable battery interior metal plate is by the magnetic field
It influences, the eddy-current loss of generation can cause battery hot, set off an explosion or fire is dangerous, and the magnetic field can interfere surrounding device
Part influences the normal work of entire charger.Therefore shielding material or absorbing material must be used on technological layer, to hinder
The gear magnetic line of force leaks, to ensure the safe and efficient work of entire charging system.Transmitting terminal and reception end line in practical applications
Circle is all placed in shielding, to reach raising efficiency, reduces the purpose of interference.
With the liter of the progress frequency of use of the increase (be now 5-15W between) and technology of the charge power of smart mobile phone
High such as 325KHZ, mr techniques (6.78MHZ).Conventional technique is to be made using the ferrite of a high permeability with conventional
Amorphous nano-crystalline do shielding material.Charge frequency range in Qi rechargeable standards is between 100-200KHz, in small-power
In conventional amorphous nano-crystalline, ferrite is poor for effect using iron-based or cobalt base amorphous, nanocrystalline material as electromagnetic shielding piece
It is not very big, iron-based or cobalt base amorphous, nanocrystalline material are as the with obvious effects of electromagnetic shielding piece under 10-15W power
It is conventional to make amorphous nano-crystalline better than ferrite.Market carries wireless charging mobile phone, all uses amorphous or nanocrystalline screen substantially
Piece is covered, Samsung already uses, and apple also attempts to shield piece using amorphous nano-crystalline now.
With the increase of charge requirement power and the generation for the new technology that charges, efficiency raising is all wireless charging all the time
The target that industry is pursued.Many patents refer to amorphous lamination, rolling crushes, heat treatment process, etch process, when pressings
Glue is made to fill up the gap of fragment, so as to increase magnetic resistance, reduce eddy-current loss, to improve charge efficiency.
Although technique mentioned above has in reduction eddy-current loss, but its process has the drawbacks of very big, such as rolls
Pressing the disorderly and unsystematic shape gap size of broken fragment, inconsistent (colloid fills gap not of uniform size, causes material interlayer
Magnetic material dielectric perseverance under certain frequency can differ), cause performance unstable (magnetic conductivity difference is excessive).Etch process,
Although its shape and gap width can be controlled, to being bonded the etching strips of glue-line, etch process (with FPC etching methods)：
Amorphous, nanometer crystal alloy band → oil removing → washing → drying → pad pasting → exposure → development → washing → etched pattern → washing
→ striping → washing → pickling → washing → drying → inspection.Process above process complex process is longer, and glue-line band passes through again
Strong acid aqueous slkali and etching solution, general etching method coil base material is PI base material high temperature resistant strong acid aqueous slkalis, and glue-line performance becomes
It is oxidizable to be not easy dry band at change and gap.Cost is high, and is handled and heats by chemicals, pollutes ring
Border is seriously unfavorable for environmental protection, and environmentally protective disagree is advocated with government.Consistency of performance is poor, and charge efficiency is relatively low.
Invention content
It is an object of the invention to solve at least the above, and provide the advantages of at least will be described later.
Make that eddy-current loss further reduces, charge efficiency is further improved it is a still further object of the present invention to provide one kind
And the preparation process of environmentally protective wireless charging application shielding piece simple for process.
To achieve these goals, the present invention provides a kind of preparation process of wireless charging application shielding piece, the nothings
Micro USB electricity application shielding piece includes at least one layer of shielded layer being longitudinally superimposed, and every layer of shielded layer is by least a piece of soft magnetism screen unit
It is horizontally-spliced to form, specifically include following steps：
Step 1: selecting soft magnetic materials, the soft magnetic materials is sequentially wound and is heat-treated, obtaining tool, there are two naked
The base material shown up；
Step 2: one of exposed surface in the base material pastes double faced adhesive tape, and shaken using energy wire cutting harmony wave
Swing with reference to mode another exposed surface of the base material is cut and is shaken, by the base material resolve into several
The shred of even shape and certain size, and there is gap between adjacent two shreds, so as to obtain a piece of soft magnetism screen unit；
Wherein, when wireless charging application shielding piece includes two layers and more than two layers of shielded layer, and every layer of shielded layer
When being formed by two panels and two panels more than soft magnetism screen unit are horizontally-spliced, in adjacent two-layer screen layer, in the shielded layer of upper strata
Several shreds in double faced adhesive tape fitting underlying shield layer, while several shreds covering underlying shield layer in the shielded layer of upper strata
In shred between gap and soft magnetism screen unit between stitching position；
When wireless charging application shielding piece includes two layers and more than two layers of shielded layer, and every layer of shielded layer is by a piece of
When soft magnetism screen unit forms, in adjacent two-layer screen layer, in the double faced adhesive tape fitting underlying shield layer in the shielded layer of upper strata
Several shreds, while the gap between the shred in several shreds covering underlying shield layer in the shielded layer of upper strata.
Preferably, a kind of preparation process of wireless charging application shielding piece further includes：
Colloid protective film is covered in the double faced adhesive tape following table for being located at undermost shielded layer in wireless charging application shielding piece
Face；
PET film is covered in wireless charging application shielding piece and is located on several shreds in the shielded layer of top layer
Surface.
Preferably, the preparation process of described a kind of wireless charging application shielding piece, in the soft magnetism screen unit, phase
Gap between adjacent two shreds is 1 μm -100 μm.It is preferred that 10 μm -35 μm.
Preferably, the preparation process of described a kind of wireless charging application shielding piece in the step 2, uses first
The mode of the laser wire cutting of certain wavelength carries out another exposed surface of the base material cutting of certain depth, so that institute
Another exposed surface for stating base material generates several gaps, if being then by base material concussion using the mode of ultrasonic oscillation
Dry shred, so as to obtain several shreds, and has the gap between adjacent shred, wherein, laser wire cutting
Depth is the 50%-95% of the base material thickness.
Preferably, the preparation process of described a kind of wireless charging application shielding piece, the size of the shred for 26 μm-
4.5mm.It is preferred that 80 μm of -2mm.
Preferably, the preparation process of described a kind of wireless charging application shielding piece in the step 1, chooses soft magnetism
Material is wound to preliminary dimension as requested；Soft magnetic materials after winding is placed in heat-treatment furnace and is heat-treated, in heat
It carries out adding magnetic field in processing procedure or is not added with magnetic field, so as to obtain base material of the tool there are two exposed surface.
Preferably, the preparation process of described a kind of wireless charging application shielding piece, the thickness of the base material for 14 μm-
50 μm, the base material is that Fe-based amorphous, iron based nano crystal, cobalt base amorphous or cobalt-based after winding heat treatment are nanocrystalline.
Preferably, the preparation process of a kind of wireless charging application shielding piece, the wireless charging application shielding
Piece includes 1-12 layers of shielded layer.It is preferred that 2-10 layers.
Preferably, a kind of preparation process of wireless charging application shielding piece, the shielding of adjacent two panels soft magnetism are single
Member is horizontally-spliced together using double faced adhesive tape.
The wireless charging application shielding piece that the present invention is prepared using the preparation process of wireless charging application shielding piece, including：
At least one layer of shielded layer, is longitudinally superimposed up and down, and every layer of shielded layer is laterally spelled by least a piece of soft magnetism screen unit
Connect, the soft magnetism screen unit include double faced adhesive tape and cover the one of exposed surface of the double faced adhesive tape several are thin
Piece, has gap between adjacent two shreds, and several in the double faced adhesive tape fitting underlying shield layer in the shielded layer of upper strata
Shred, gap between the shred in several shreds covering underlying shield layer and soft magnetism screen unit in the shielded layer of upper strata it
Between stitching position；
Colloid protective film is fitted in the remaining exposed surface of the double faced adhesive tape in lowest level shielded layer；And
PET film is fitted in the upper surface of several shreds in top layer's shielded layer.
The present invention includes at least following advantageous effect：
1st, a kind of preparation process of wireless charging application shielding piece of the present invention is shaken by energy wire cutting harmony wave
The mode for swinging combination so that the electromagnetic performance magnetic conductivity for shielding piece is relatively more average, and magnetic loss is smaller, and quality factor are higher, obtains
The shred of several uniform shapes and certain size, ensure that shred property uniform in size and shred between gap size
Consistency, so as to ensure that the consistency of colloid loading in gap, the surface impedance eddy-current loss that becomes larger is small, in certain frequency
Lower dielectric properties are stablized so that charge efficiency must improve, and energy loss is small during work, and it is good to shield tablet stability, automates journey
It is easily achieved.
2nd, a kind of preparation process letter of wireless charging application shielding piece of the present invention is answered easy, environmentally protective.
3rd, a kind of wireless charging application shielding piece thickness of the present invention is thin, screening ability is good, charge efficiency is high, work
Stablize, product stability height, and process and material cost is greatly saved.
Part is illustrated to embody by further advantage, target and the feature of the present invention by following, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the process flow chart of wireless charging of the present invention application shielding piece；
Fig. 2 is the sectional view of soft magnetism screen unit of the present invention；
Fig. 3 is the sectional view of wireless charging of the present invention application shielding piece；
Fig. 4 is the vertical view of soft magnetism screen unit in wireless charging of the present invention application shielding piece；
In figure, 1- double faced adhesive tapes；2- shreds；3- gaps；4-PET films；5- colloid protective films；6- stitching positions.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail, those skilled in the art to be enabled to join
Book word can be implemented according to this as directed.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein are not precluded one or more
The presence or addition of a other element or combinations.
As shown in Figure 1, the present invention provides a kind of preparation process of wireless charging application shielding piece, and pass through in detail below
Embodiment be described in detail：
Soft magnetic materials and relevant production units are got out, cutting coiling is carried out to soft magnetic materials, soft magnetic materials cutting is set
Fixed width degree is wound to defined internal-and external diameter according still further to process requirements；
The soft magnetic materials of winding is placed on and adds magnetic field or is not heat-treated plus in the heat-treatment furnace in magnetic field, is obtained
There are two the base materials of exposed surface for tool；By rolling fitting by sticking double faced adhesive tape base material one of exposed surface；
Using energy wire cutting harmony wave concussion with reference to mode another exposed surface of the base material is cut, with
The base material is cut into several uniform shapes, the identical shred of size, as shown in Figure 2 and Figure 4, and adjacent two shreds
Between there is the identical gap of size, so as to obtain a piece of soft magnetism screen unit；And it is filled at gap using process for filling colloid
Glue operation；
Wherein, when wireless charging of the present invention application shielding piece includes one layer of shielded layer, and this layer of shielded layer is by one
Piece soft magnetism screen unit forms, and colloid protective film is bonded in the lower surface of the double faced adhesive tape of this layer of shielded layer, in this layer of shielded layer
The upper surface fitting PET film of several shreds.
When wireless charging of the present invention application shielding piece includes one layer of shielded layer, and this layer of shielded layer is by two panels and two
More than piece soft magnetism screen unit it is horizontally-spliced into when, laterally spelled using double faced adhesive tape between adjacent two panels soft magnetism screen unit
It is connected together, and the lower surface of the double faced adhesive tape of the shielded layer obtained after splicing pastes colloid protective film, is obtained after splicing
The upper surface of several shreds of shielded layer pastes PET film；
When wireless charging of the present invention application shielding piece includes two layers and more than two layers of shielded layer, and every layer of shielding
Layer is made of a piece of soft magnetism screen unit, in adjacent two-layer screen layer, the double faced adhesive tape fitting position in the shielded layer on upper strata
Several shreds in the shielded layer of lower floor, and several shreds covering in the shielded layer on upper strata is positioned at the screen of lower floor
The gap between several shreds in layer is covered, successively longitudinal direction superposition up and down, and the integrally-built double faced adhesive tape after superposition
Lower surface is bonded colloid protective film, and PET film is bonded in the upper surface of several integrally-built shreds；
When wireless charging of the present invention application shielding piece include two layers and above shielded layer, and every layer of shielded layer by
At least two panels soft magnetism screen unit it is horizontally-spliced into when, at least two panels soft magnetism in one layer of shielded layer of composition is shielded first single
Member is carried out horizontally-spliced using double faced adhesive tape, to obtain the shielded layer of certain size, and every layer of shielded layer is longitudinally superimposed upon up and down
Together, in adjacent two-layer screen layer, the double faced adhesive tape in the shielded layer of upper strata is pasted onto with several shreds in underlying shield layer
Together, the gap and adjacent between several shreds in several shreds covering underlying shield layer and in the shielded layer of upper strata
The lower surface fitting colloid of stitching position between two panels soft magnetism screen unit, the finally integrally-built double faced adhesive tape after superposition
Protective film is bonded PET film in the upper surface of several integrally-built shreds.
The shielding piece of the present invention is made regulation shape as requested, and with amorphous sheet or permalloy piece, cooling fin
And coiled wire-wound coil or FPC fit together, and form component.
Using above-mentioned technique, as shown in figs 2-4, the invention discloses a kind of applications of wireless charging to shield piece, including：1-
Double faced adhesive tape；2- shreds；3- gaps；4-PET films；5- colloid protective films；6- stitching positions
At least one layer of shielded layer, is longitudinally superimposed up and down, and every layer of shielded layer is laterally spelled by least a piece of soft magnetism screen unit
It connects, as shown in Fig. 2, the soft magnetism screen unit includes double faced adhesive tape 1 and covers in 1 one of exposed surface of double faced adhesive tape
Several shreds 2, there is between adjacent two shreds 2 gap 3, as shown in Figure 3, Figure 4, the double faced adhesive tape in the shielded layer of upper strata
Several shreds 2 in 1 fitting underlying shield layer are thin in several shreds 2 covering underlying shield layer in the shielded layer of upper strata
The stitching position 6 between gap 3 and soft magnetism screen unit between piece；The shape of shred 2 is as shown in Figure 4；
Colloid protective film 5 is fitted in the remaining exposed surface of the double faced adhesive tape 1 in lowest level shielded layer；And
PET film 4 is fitted in the upper surface of several shreds 2 in top layer's shielded layer.
The present invention cuts and can shake and advised in a manner that the laser beam and ultrasonic wave for selecting certain wavelength combine
The then shred of shape and certain size, and ensure that the gap size between adjacent shred is identical, it ensure that the seam of identical size
The same amount of colloid of filling in gap, resistivity increase, and eddy-current loss reduces, so as to further improve charge efficiency and it is high-power under
Shielding action, below will be with the shape of gap size of the specific embodiment between adjacent shred, shred and shred
Size, in lamination process influence of the parameters such as colloid gap filling degree to charge efficiency and loss illustrate.
The advantage of this artistic face processing：Pass through test of many experiments to wireless charging efficiency, different shape shred pair
The influence for shielding piece performance is different, if the size of shred is big, present invention shielding piece local resistivity can be caused to become smaller, make vortex
Loss becomes larger, if the gap size between two adjacent shreds is too small, colloid cannot or be seldom filled into gap, week
The shred of similary shape enclosed is easily attached to together, shielding piece major part zone resistance rate be caused to become smaller, makes eddy-current loss
Become larger, if gap size is excessive, leakage field phenomenon is had between adjacent two-layer screen layer, the magnetic line of force can be beaten in battery metal plate
Vortex is generated, causing the loss of energy influences performance.And gap and splicing between the shred of the shred covering lower floor on upper strata
Position can make each soft magnetism screen unit of same layer insulate independently of each other, further reduce eddy-current loss.
The preparation process of wireless charging application shielding piece of the present invention can obtain a kind of shielding piece, with excellent
Electromagnetic wave shielding function.During upper and lower lamination, colloid can enter that gap filling is fuller, can ensure in this way exhausted between magnetic sheet
Edge degree, the dielectric properties of spliced materials and avoids the oxidation of material and the aging of magnetic property at gap, and ensure structural behaviour
Stablize.
The present invention lists the gap difference and wireless charging of different sizes application shielding flake products between 30 kinds of shreds,
As shown in table 1；Table 2 lists influence of the size of shred in the shielding piece with same thickness to inductance and component impedance value.
Table 3 list gap size between two neighboring shred it is identical when, the influence of the size of shred to charge efficiency.Table 4 is listed
The shielding piece of same thickness, the influence of gap size between shred to the impedance value of inductance and component.Table 5 lists shred
Size it is identical when, influence of the gap size to charge efficiency between shred.
The size of gap size and shred between the shred of 1. 30 kinds of products of table
Influence of the size of 2. shred of table to inductance and component impedance value
Influence of the size of 3. shred of table to charge efficiency
The influence of gap between 4. shred of table to the impedance value of inductance and component
| Embodiment | Gap size/μm | Shield piece thickness (mm) | Inductance (uH) | Component RS (m Ω) |
| Embodiment 11 | 3 | 0.1 | 6.36 | 211 |
| Embodiment 12 | 10 | 0.1 | 6.20 | 186 |
| Embodiment 13 | 20 | 0.1 | 6.18 | 185 |
| Embodiment 14 | 50 | 0.1 | 6.00 | 219 |
| Embodiment 15 | 80 | 0.1 | 5.89 | 222 |
Influence of the gap size to charge efficiency between 5. shred of table
From table 2 it can be seen that shred becomes large-sized, inductance also becomes larger, and the impedance value of component increases again from big become smaller.
Under the conditions of the size of 3 same slit of table is 15 μm, the size in gap that size and the measurement of shred obtain needs to put down
Weighing apparatus could obtain charge efficiency most preferably.From with traditional roller crushing process ration, the minimum embodiment 22 of charge efficiency all compares roller
Compacting is made efficient.Illustrating that the surface patches lines of roll-in making is disorderly and unsystematic causes magnetic conductivity difference excessive, sheet resistance
The uneven eddy-current loss increase of rate causes charge efficiency relatively low, when the size of shred is between 0.5mm-2.2mm under same slit
Charge efficiency highest.Optimum selecting 0.8mm-2.2mm.Optimum selecting 0.8mm-1.5mm.Optimum selecting 1.0mm-1.5mm.
Under the conditions of table 4 is dimension of picture 1mm, the shred of different gap sizes is obtained, it can be seen that with gap size
Become larger, inductance continuously decreases, and magnetic conductivity can also decline, and component RS values are also first to become smaller greatly to become larger again again.
Table 5 is under the conditions of the size of shred is 1mm, and processing obtains the shielding piece in different gaps and roller crushing technique makes
Comparison, test its charge efficiency obtain table 5 as a result, the size of shred and the size in gap need to meet simultaneously could obtain most preferably
Charge efficiency.From with traditional roller crushing process ration, the minimum embodiment of charge efficiency all than roll-in make it is efficient.
Illustrating that the surface patches lines of roll-in making is disorderly and unsystematic causes magnetic conductivity difference excessive, the uneven eddy-current loss of surface resistivity
Increase cause charge efficiency relatively low, shred size under the same conditions, gap size be 10 μm -50 μm between when charge efficiency most
Height, preferentially 10 μm -35 μm.20 μm -30 μm of optimum selecting.
It is analyzed in summary by table 2,3,4,5, comparing can obtain in length and breadth, the shred and gap size of 0.8mm-1.5mm
Charge efficiency highest when being 15 μm -25 μm.The comparison of random with traditional roll-in crushing process charge efficiency, the innovation technique compared with
Traditional handicraft is excellent.
Comparing in length and breadth in summary can obtain, the shred size and gap size of 0.8mm-1.5mm are filled when being 15 μm -25 μm
Electrical efficiency highest.The random crushing process of traditional roll-in is compared again by present invention process compared to charge efficiency, skill of the present invention is equal
It is excellent compared with general technology.
Although the embodiments of the present invention have been disclosed as above, but its be not restricted in specification and embodiment it is listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, it is of the invention and unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of preparation process of wireless charging application shielding piece, which is characterized in that the wireless charging application shielding piece includes
The shielded layer that at least one layer is longitudinally superimposed, every layer of shielded layer are formed by least a piece of soft magnetism screen unit is horizontally-spliced, specific to wrap
Include following steps：
Step 1: selecting soft magnetic materials, the soft magnetic materials is sequentially wound and is heat-treated, obtaining tool, there are two exposed surfaces
Base material；
Step 2: one of exposed surface in the base material pastes double faced adhesive tape, and use energy wire cutting harmony wave concussion knot
The mode of conjunction is cut and is shaken to another exposed surface of the base material, and the base material is resolved into several uniform shapes
The shred of shape and certain size, and there is gap between adjacent two shreds, so as to obtain a piece of soft magnetism screen unit；
Wherein, when wireless charging application shielding piece includes two layers and more than two layers of shielded layer, and every layer of shielded layer is by two
Piece and two panels more than soft magnetism screen unit it is horizontally-spliced into when, it is two-sided in the shielded layer of upper strata in adjacent two-layer screen layer
Several shreds in glue laminating underlying shield layer, while in several shreds covering underlying shield layer in the shielded layer of upper strata
The stitching position between gap and soft magnetism screen unit between shred；
When wireless charging application shielding piece includes two layers and more than two layers of shielded layer, and every layer of shielded layer is by a piece of soft magnetism
It is several in the double faced adhesive tape fitting underlying shield layer in the shielded layer of upper strata in adjacent two-layer screen layer when screen unit forms
A shred, while the gap between the shred in several shreds covering underlying shield layer in the shielded layer of upper strata.
2. the preparation process of a kind of wireless charging application shielding piece according to claim 1, which is characterized in that further include：
Colloid protective film is covered in the double faced adhesive tape lower surface for being located at undermost shielded layer in wireless charging application shielding piece；
PET film is covered in several shred upper surfaces being located in wireless charging application shielding piece in the shielded layer of top layer.
A kind of 3. preparation process of wireless charging application shielding piece according to claim 1, which is characterized in that the soft magnetism
In screen unit, the gap between two neighboring shred is 1 μm -100 μm.
A kind of 4. preparation process of wireless charging application shielding piece according to claim 1, which is characterized in that the step
In two, certain depth is carried out to another exposed surface of the base material using the mode of the laser wire cutting of certain wavelength first
Cutting, so that another exposed surface of the base material generates several gaps, then using the mode of ultrasonic oscillation by institute
It is several shreds to state base material concussion, so as to obtain several shreds, and has the gap between adjacent shred,
In, the depth of laser wire cutting is the 50%-95% of the base material thickness.
A kind of 5. preparation process of wireless charging application shielding piece according to claim 1, which is characterized in that the shred
Size be 26 μm of -4.5mm.
A kind of 6. preparation process of wireless charging application shielding piece according to claim 1, which is characterized in that the step
In one, soft magnetic materials is chosen, is wound to preliminary dimension as requested；By the soft magnetic materials after winding be placed in heat-treatment furnace into
Row heat treatment carries out adding magnetic field in heat treatment process or is not added with magnetic field, so as to obtain base material of the tool there are two exposed surface.
A kind of 7. preparation process of wireless charging application shielding piece according to claim 1, which is characterized in that the base material
Thickness for 14 μm -50 μm, the base material be Fe-based amorphous, iron based nano crystal, the cobalt base amorphous or cobalt after winding is heat-treated
Base nanometer crystal.
8. the preparation process of a kind of wireless charging application shielding piece according to claim 1, which is characterized in that described wireless
Charging application shielding piece includes 1-12 layers of shielded layer.
A kind of 9. preparation process of wireless charging application shielding piece according to claim 1, which is characterized in that adjacent two
Piece soft magnetism screen unit is horizontally-spliced together using double faced adhesive tape.
10. a kind of nothing prepared by preparation process according to wireless charging as described in any one of claim 1 to 9 application shielding piece
Micro USB electricity application shielding piece, which is characterized in that including：
At least one layer of shielded layer, is longitudinally superimposed up and down, every layer of shielded layer it is horizontally-spliced by least a piece of soft magnetism screen unit and
Into the soft magnetism screen unit includes double faced adhesive tape and covers several shreds in the one of exposed surface of the double faced adhesive tape, phase
There are gap, and several shreds in the double faced adhesive tape fitting underlying shield layer in the shielded layer of upper strata between two adjacent shreds,
Several shreds in the shielded layer of upper strata are covered between gap and soft magnetism screen unit between the shred in underlying shield layer
Stitching position；
Colloid protective film is fitted in the remaining exposed surface of the double faced adhesive tape in lowest level shielded layer；
PET film is fitted in the upper surface of several shreds in top layer's shielded layer.
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| CN201810206457.6A CN108235676A (en) | 2018-03-13 | 2018-03-13 | A kind of preparation process and shielding piece of wireless charging application shielding piece |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108831732A (en) * | 2018-07-11 | 2018-11-16 | 深圳市智信精密仪器有限公司 | A kind of electromagnetic plate process equipment |
| CN109152317A (en) * | 2018-08-17 | 2019-01-04 | 蓝沛光线（上海）电子科技有限公司 | A kind of high-performance shielding piece, preparation method and its coil mould group |
| CN109462973A (en) * | 2018-08-01 | 2019-03-12 | 昆山联滔电子有限公司 | A kind of magnetic field shielding piece and its manufacturing method |
| CN110138104A (en) * | 2019-06-14 | 2019-08-16 | 青岛大学 | A kind of composite shielding layer for wireless power transmission magnetic coupler |
| CN110769670A (en) * | 2018-07-27 | 2020-02-07 | 广州方邦电子股份有限公司 | Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108831732A (en) * | 2018-07-11 | 2018-11-16 | 深圳市智信精密仪器有限公司 | A kind of electromagnetic plate process equipment |
| CN108831732B (en) * | 2018-07-11 | 2024-01-12 | 深圳市智信精密仪器有限公司 | Electromagnetic sheet processing equipment |
| CN110769670A (en) * | 2018-07-27 | 2020-02-07 | 广州方邦电子股份有限公司 | Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film |
| CN110769670B (en) * | 2018-07-27 | 2023-12-05 | 广州方邦电子股份有限公司 | Electromagnetic shielding film, circuit board and preparation method of electromagnetic shielding film |
| CN109462973A (en) * | 2018-08-01 | 2019-03-12 | 昆山联滔电子有限公司 | A kind of magnetic field shielding piece and its manufacturing method |
| CN109152317A (en) * | 2018-08-17 | 2019-01-04 | 蓝沛光线（上海）电子科技有限公司 | A kind of high-performance shielding piece, preparation method and its coil mould group |
| KR20200020562A (en) * | 2018-08-17 | 2020-02-26 | 선라인 프린팅 (상하이) 일렉트로닉스 주식회사 | High-performance shielding sheet and preparation method thereof and coil module comprising the same |
| KR102522857B1 (en) * | 2018-08-17 | 2023-04-17 | 선라인 프린팅 (상하이) 일렉트로닉스 주식회사 | High-performance shielding sheet and preparation method thereof and coil module comprising the same |
| CN110138104A (en) * | 2019-06-14 | 2019-08-16 | 青岛大学 | A kind of composite shielding layer for wireless power transmission magnetic coupler |
| CN110138104B (en) * | 2019-06-14 | 2023-11-17 | 青岛大学 | Composite shielding layer for wireless power transmission magnetic coupler |
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Effective date of registration: 20201208 Address after: 578-1 Yanxin Road, Wuxi Huishan Economic Development Zone, Wuxi City, Jiangsu Province Applicant after: Wuxi lanpei New Material Technology Co.,Ltd. Address before: 201500 3, Tiangong Road, Jinshan Industrial Area, Jinshan District, Shanghai, 857 Applicant before: LANPEI GUANGXIAN (SHANGHAI) ELECTRONIC TECHNOLOGY Co.,Ltd. |
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Application publication date: 20180629 |