CN110010331A - Contactless charging magnetic shield piece and its application - Google Patents
Contactless charging magnetic shield piece and its application Download PDFInfo
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- CN110010331A CN110010331A CN201810007294.9A CN201810007294A CN110010331A CN 110010331 A CN110010331 A CN 110010331A CN 201810007294 A CN201810007294 A CN 201810007294A CN 110010331 A CN110010331 A CN 110010331A
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- magnetic shield
- heat dissipating
- shield piece
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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
- H01F27/08—Cooling; Ventilating
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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
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Contactless charging magnetic shield piece disclosed by the invention includes: longitudinally superimposed several layers magnetic alloy layer, every layer of magnetic alloy layer is formed by multi-disc ptmn alloy film is horizontally-spliced, at least one surface of at least one layer of magnetic alloy layer is provided with heat dissipating layer, includes the mixture of one or both of carbon nanotube and graphene in the composition of heat dissipating layer.Contactless charge provided by the invention uses magnetic shield piece, contains heat dissipating layer in structure composition, includes the mixture of one or both of carbon nanotube and graphene in the composition of the heat dissipating layer, it can be achieved that shielding the high efficiency and heat radiation of piece.The magnetic shield piece can be applied to the portable terminal that mobile phone, wrist-watch, glasses, bracelet, tablet computer, notebook, unmanned plane, sound equipment, mouse, e-book, earphone, TV, charger etc. need to carry out contactless charging, and the magnetic shield piece of fuel factor is generated for managing ac magnetic field in contactless charging.
Description
Technical field
The present invention relates to a kind of magnetic shield piece, specifically a kind of contactless charging magnetic shield piece and its application,
The magnetic shield piece can be applied to mobile phone, wrist-watch, glasses, bracelet, tablet computer, notebook, unmanned plane, sound equipment, mouse, electronics
The various portable terminals such as book, earphone, TV, charger are generated for managing ac magnetic field in contactless charging
The magnetic shield piece of fuel factor.
Background technique
Contactless charging is since its higher charge efficiency and the power supply mode of non-contact electrode are increasingly by portable
The favor of formula equipment, such as mobile phone, wrist-watch, glasses terminal.It can be real its main feature is that not needing charging port on portable equipment
It now charges, can satisfy the higher waterproof requirement of equipment and design requirement.
In contactless charging, ac magnetic field between transmitting coil and receiving coil in a manner of electromagnetic coupling into
Row energy transmission.Wherein, due to the limitation in space in portable terminal, the receiving coil of ac magnetic field is typically placed at
Battery surface in terminal device.In this way, when receiving coil receives the ac magnetic field that transmitting coil generates, ac magnetic field
Eddy-current loss can be generated in battery surface, directly contribute receiving coil energy acceptance low efficiency and battery modules are easy showing for overheat
As.
To solve this problem, it proposes receiving end line in Korean Patent Laid-Open 10-2010-31139 patent document
Configuration includes the composite magnetic body of multiple magnetic pieces (magnetic recording tape) between circle and battery, to prevent ac magnetic field from receiving coil
It is radiated battery, thus the noise for inhibiting induced electromotive force to generate and fever, and control and receive the inductance variation of coil.Wherein
Composite magnetic body can be by ferrite sheet, or the polymer sheet comprising magnetic powder, or magnetic amorphous band complex is realized.Magnetic amorphous
Band complex is that the two sides of multiple magnetic amorphous bands is adhered to by polycarbonate resin to realize.
But above scheme does not consider that, when alternating electromagnetic field frequencies range is higher than 100KHz, ac magnetic field is magnetic non-
Brilliant strip surface generates the influence of eddy-current loss and declines application function.Korean Patent Laid-Open the 10-2011-0138987th
Patent document is proposed using magnetic amorphous band, is greatly reduced by fragmentation is carried out to band by eddy current
Caused loss, and the magnetic field influence that receiving coil generates the ontology of portable terminal and battery is shielded simultaneously, with true
Protect high recharge efficiency.
Nonetheless, client's in use, the fuel factor that receiving coil generates still influences whether that portable terminal is set
The safety of standby battery.Therefore, client would generally be pasted between magnetic amorphous band complex and battery one layer 20 microns to 30 it is micro-
Rice graphite linings to radiate to battery, such as the design of Samsung Galaxy S7 mobile phone.Since graphite linings itself are easy bits, need
5 microns to 10 microns of double faced adhesive tape and plastic foil protective layer is sticked respectively in the two sides of graphite linings.But graphite linings can be reduced in this way
Heat dissipation effect, and increase magnetic amorphous band complex and graphite linings be bonded and the complexity of die-cutting process.
In conclusion how to reduce the pass that influence of the receiving coil fuel factor to battery modules is contactless charging technique
Key, and realize the premise of portable device battery modules safety.The prior art is by increasing magnetosphere, such as Korean Patent Laid-Open
10-2010-31139 patent, by being inserted into ferrite, magnetic powder polymer sheet, magnetic amorphous in battery and receiving coil
Increase the ac magnetic field coefficient of coup of receiving coil with complex to reduce fuel factor；Or magnetic amorphous is inserted by reducing
Eddy-current loss with complex or magnetic Nano crystal zone complex, such as Korean Patent Laid-Open 10-2011-0138987 patent,
To realize the heat management of non-contact type wireless charging；Or directly in magnetic Nano crystal zone complex and magnetic amorphous ribbon complex back
After stick on graphite flake to radiate.
However, there is no consider to receive in magnetic Nano alloy strip complex or magnetic amorphous ribbon complex for above-mentioned various schemes
The heat conduction problem in rice crystal zone and amorphous ribbon itself, and the graphite flake sticked on will increase amorphous ribbon complex cross cutting and be bonded with it
The complexity of technique.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficiencies of the prior art, providing one kind and capableing of high efficiency and heat radiation
Contactless charging magnetic shield piece and its application.
The technical scheme of the invention to solve the technical problem is: contactless charging magnetic shield piece, it should
Magnetic shield piece includes: longitudinally superimposed several layers magnetic alloy layer, and magnetic alloy layer described in every layer is by multi-disc magnetic alloy
Piece is horizontally-spliced to be formed, at least one surface of magnetic alloy layer described at least one layer is provided with heat dissipating layer, the heat dissipation
It include the mixture of one or both of carbon nanotube and graphene in the composition of layer.
Preferably, magnetic alloy layer described in single layer with a thickness of 10~30 μm, the thickness of heat dissipating layer described in single layer
Be 0.1~30 μm, adhesive layer described in single layer with a thickness of 1~30 μm.
Further, heat dissipating layer described in single layer with a thickness of 2~10 μm.
Further, adhesive layer described in single layer with a thickness of 1~10 μm.
Further, magnetic alloy layer described in single layer with a thickness of 12~18 μm.
Preferably, being provided with insulating layer between the piece and piece of the multi-disc ptmn alloy film.The setting of insulating layer, can
Further decrease the eddy-current loss of magnetic alloy layer surface.
Preferably, the heat dissipating layer is coated by the mixture of carbon nanotube and/or graphene and ink and heats
It being formed by curing, in the heat dissipating layer, in terms of the quality of the ink after solidifying, the quality accounting of carbon nanotube and/or graphene is 5~
35%.Further, to reach better heat dissipation effect, the heat dissipating layer is coated by the mixture of carbon nanotube and ink
It to be formed with being heating and curing, in the heat dissipating layer, in terms of the quality of the ink after solidifying, the quality accounting of carbon nanotube is 6~11%；
Alternatively, the heat dissipating layer is coated by the mixture of graphene and ink and is heating and curing and is formed, in the heat dissipating layer, with solidification
The quality meter of ink afterwards, the quality accounting of graphene are 7~15%.
It further, include polyurethane resin, epoxy resin, acrylic resin, ethyl vinyl acetate second in the ink
Enester resin, carbamide resin, phenolic resin, celluosic resin, organic siliconresin, nitrocellulose resin, polyester resin, amino
At least one of resin, polyolefin resin, chlorinated polyolefin resin and alkyd resin.
Alternatively, preferably, the heat dissipating layer by the mixture of carbon nanotube and/or graphene and glue through spraying and
It is heating and curing to be formed, in the heat dissipating layer, in terms of the quality of the glue after solidifying, the quality accounting of carbon nanotube and/or graphene
It is 5~35%.
It further, include acrylic resin, polyurethane resin, epoxy resin, ethyl vinyl acetate second in the glue
At least one of enester resin and organic siliconresin.
Preferably, the unilateral or bilateral of magnetic alloy layer described in every layer is provided with adhesive layer, the adhesive layer is set
Set the magnetic alloy layer surface or the surface of the heat dissipating layer is set, the adhesive layer is with substrate
Double faced adhesive tape or by polyacrylate, epoxy resin, polyurethane resin, polyethylene terephthalate, acrylic resin, poly-
The adhesive layer without substrate of the mixture composition of one or more of vinyl and organic siliconresin.
Preferably, magnetic alloy layer described in every layer is made of Fe-based amorphous alloy or iron-base nanometer crystal alloy, it is thick
Degree is 12~30 μm；The Fe-based amorphous alloy be Fe-Si-B Fe-based amorphous alloy or Fe-Si-B-Co Fe-based amorphous alloy,
The iron-base nanometer crystal alloy is Fe-Si-B-Cu-Nb iron-base nanometer crystal alloy.
Above-mentioned contactless charging is with magnetic shield piece in mobile phone, wrist-watch, glasses, bracelet, tablet computer, notebook, nothing
Man-machine, sound equipment, mouse, e-book, earphone, TV, the application in charger.Other than the above-mentioned terminal device specifically listed,
Magnetic shield piece of the present invention also can be applied to other portable terminals for needing to carry out contactless charging.
Compared with the prior art, the advantages of the present invention are as follows: contactless charging magnetic shield piece provided by the invention,
Contain heat dissipating layer in its structure composition, includes the mixed of one or both of carbon nanotube and graphene in the composition of the heat dissipating layer
Object is closed, it can be achieved that shielding the high efficiency and heat radiation of piece.The magnetic shield piece can be applied to mobile phone, wrist-watch, glasses, bracelet, tablet computer,
Notebook, unmanned plane, sound equipment, mouse, e-book, earphone, TV, charger etc. need to carry out the portable of contactless charging
Terminal device generates the magnetic shield piece of fuel factor for managing ac magnetic field in contactless charging.
Detailed description of the invention
Fig. 1 is the structural exploded view of the contactless charging magnetic shield piece of embodiment 1；
Fig. 2 is the vertical profile structural schematic diagram of the contactless charging magnetic shield piece of embodiment 1；
Fig. 3 is the vertical profile structural decomposition diagram of the contactless charging magnetic shield piece of embodiment 3.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
The contactless charging magnetic shield piece of embodiment 1, as depicted in figs. 1 and 2, comprising: a layer thickness be 10~
30 μm of magnetic alloy layer 2, the magnetic alloy layer 2 are formed by multi-disc ptmn alloy film 21 is horizontally-spliced, the magnetic alloy layer 2
Two surfaces are respectively arranged with heat dissipating layer 1 and adhesive layer 3, include carbon nanotube, the surface of adhesive layer 3 in the composition of heat dissipating layer 1
It is provided with release film 4.
In embodiment 1, insulating layer (not shown) can also be set between the piece and piece of multi-disc ptmn alloy film 21,
To further decrease the eddy-current loss on 2 surface of magnetic alloy layer.
In embodiment 1, magnetic alloy layer is made of Fe-based amorphous alloy, and specifically, which is Fe-Si-B
Fe-based amorphous alloy, atomic percent composition are as follows: Fe 70~90%, Si 10~30%, B 10~30%, further,
The amorphous performance of alloy is the most excellent when the sum of atom percentage content of Si and B is 10~30%.Preferably, the Fe-Si-B
It may further be enriched with element Cr of the atom percentage content no more than 20%, Co in Fe-based amorphous alloy, to improve the corrosion resistant of alloy
Corrosion energy, also can according to need and adds other elements again.Fe-Si-B Fe-based amorphous alloy can select above-mentioned atomic percent
Composition, can also select other conventionally known compositions.Fe-Si-B Fe-based amorphous alloy in embodiment 1 can also be by Fe-
Si-B-Co Fe-based amorphous alloy substitution, Fe-Si-B-Co Fe-based amorphous alloy can select conventionally known composition.
The preparation process of the contactless charging magnetic shield piece of embodiment 1 are as follows: in 300 DEG C to 600 DEG C of temperature model
Enclose it is interior to magnetic alloy layer 2 carry out 30 minutes to 2 hours without magnetic-field heat treatment, to obtain higher magnetic conductivity, and drop to
Room temperature.Again in the mixture of a surface elder generation carbon nano-tube coating and ink of the magnetic alloy layer 2, the baking for being placed on 80 DEG C
3~5min is heated in case, i.e., the heat dissipating layer 1 of 4 μ m thicks, the heat dissipating layer 1 are formed in a surface cure of the magnetic alloy layer 2
In, in terms of the quality of the ink after solidifying, the quality accounting of carbon nanotube is 9%.Then, in the another of the magnetic alloy layer 2
The double faced adhesive tape with release film 4 is sticked as adhesive layer 3 in a surface.Finally, being coated with heat dissipating layer 1 and with glue for what is obtained
The one side for being provided with heat dissipating layer 1 of the magnetic alloy layer 2 of glutinous layer 3 carries out fragmentation processing, is multi-disc by 2 fragmentation of magnetic alloy layer
Width the fine platy of 10 μm~3mm ptmn alloy film 21 to get to the contactless charging magnetic shield of embodiment 1
Piece, as depicted in figs. 1 and 2.
In embodiment 1, the mixture of carbon nanotube and ink the preparation method comprises the following steps: by the aqueous polyurethane emulsion of 35.48g
9900 with the carbitol of dioctyl sulfosuccinate GR-7M, 3.59g of pH adjusting agent AMP-95,0.79g of 1.27g and
The deionized water of 20.27g is mixed into aqueous polyurethane solution；Again by the mass concentration of aqueous polyurethane solution and 28g obtained
The dispersion of merga pass dispersion machine is mixed for the aqueous liquid dispersion and aqueous polyurethane solution of 15% carbon nanotube, with turning for 1000rpm
Speed dispersion 10 minutes to get the mixture for arriving carbon nanotube and ink.
The contactless charging magnetic shield piece of embodiment 2, difference from example 1 is that, in embodiment 2,
It include carbon nanotube and graphene in the composition of heat dissipating layer 1, in the heat dissipating layer 1, in terms of the quality of the ink after solidifying, carbon nanometer
The quality accounting of pipe is 9%, and the quality accounting of graphene is 6%.
The contactless charging magnetic shield piece of embodiment 3, as shown in Figure 3, comprising: longitudinally superimposed four layers with a thickness of
10~30 μm of magnetic alloy layer 2, every layer of magnetic alloy layer 2 are formed by multi-disc ptmn alloy film 21 is horizontally-spliced, every layer of magnetism
Two surfaces of alloy-layer 2 are provided with heat dissipating layer 1 and adhesive layer 3, include carbon nanotube in the composition of heat dissipating layer 1.
Magnetic alloy layer is made of Fe-based amorphous alloy in embodiment 3, same as Example 1 at being grouped as.
The preparation process of the contactless charging magnetic shield piece of embodiment 3 are as follows: in 300 DEG C to 600 DEG C of temperature model
Enclose it is interior to four layers of magnetic alloy layer 2 carry out 30 minutes to 2 hours without magnetic-field heat treatment, to obtain higher magnetic conductivity, and
Drop to room temperature.One layer of magnetic alloy layer 2 is taken again, in the mixture of one surface elder generation carbon nano-tube coating and ink, another
Strippable protective film is sticked on surface, the baking oven for being placed on 80 DEG C in heat 3~5min, i.e. one in the magnetic alloy layer 2
A surface cure forms the heat dissipating layer 1 of 10 μ m thicks, in the heat dissipating layer 1, in terms of the quality of the ink after solidifying, carbon nanotube
Quality accounting is 9%, then, the double faced adhesive tape with release film 4 is sticked on the heat dissipating layer 1 as adhesive layer 3, hereafter, is torn
Heat dissipating layer 1 is successively arranged on another surface of the magnetic alloy layer 2 using same method in the protective film for falling another surface
With adhesive layer 3.Finally, heat dissipating layer 1 is respectively coated in obtained two sides and has any of the magnetic alloy layer 2 of adhesive layer 3
Fragmentation processing is carried out on one side, is ptmn alloy film of the multi-disc width in the fine platy of 10 μm~3mm by 2 fragmentation of magnetic alloy layer
21.Above procedure is repeated, four layers of magnetic alloy layer 2 is obtained, the adhesive layer 3 of four layers of magnetic alloy layer is successively folded upward respectively
It sets, the release film 4 on three layers of magnetic alloy layer 2 above is torn while stacked, four layers of magnetic alloy layer 2 are sequentially stacked and are indulged
To bonding together to get the contactless charging magnetic shield piece of embodiment 3 is arrived, as shown in Figure 3.
In embodiment 3, the mixture of carbon nanotube and ink the preparation method comprises the following steps: by the aqueous polyurethane emulsion of 35.48g
9900 with the carbitol of dioctyl sulfosuccinate GR-7M, 3.59g of pH adjusting agent AMP-95,0.79g of 1.27g and
The deionized water of 20.27g is mixed into aqueous polyurethane solution；Again by the mass concentration of aqueous polyurethane solution and 28g obtained
The dispersion of merga pass dispersion machine is mixed for the aqueous liquid dispersion and aqueous polyurethane solution of 15% carbon nanotube, with turning for 1000rpm
Speed dispersion 10 minutes to get the mixture for arriving carbon nanotube and ink.
The heat dissipation effect of the contactless charging magnetic shield piece of embodiment 3 is tested: coil and the non-of embodiment 3 are connect
Touch charging is fitted with magnetic shield piece, is placed on cradle, and charged state is at, and wherein charging end uses the U.S.
The P9242 chip of Integrated Device Technology, Icn company, the output power of 10W.In magnetic shield piece
K-type thermocouple and Agilent 34970A data collector are placed in surface respectively, are measured under the different charging time in charging mode
The heat dissipating layer of magnetic shield piece and the surface temperature of magnetic alloy layer, measurement result are shown in Table 1.
Table 1: the magnetic shield piece surface temperature measurement result of the embodiment 3 under charge mode
Change embodiment 3 contactless charging magnetic shield piece heat dissipating layer in carbon nanotube quality accounting (with
The quality meter of ink after solidification), using with the contactless charging of the embodiment 3 identical measurement method of magnetic shield piece,
The surface temperature of the heat dissipating layer of magnetic shield piece, measurement result are shown in Table 2 after measurement charging 30 minutes.
Table 2: the surface temperature of the heat dissipating layer of the magnetic shield piece of different carbon nanotube mass accountings after charging 30 minutes
As seen from Table 2, in heat dissipating layer 1, the quality accounting of the carbon nanotube in terms of the quality of the ink after solidifying 6~
When 11%, magnetic shield piece has preferable heat-sinking capability；When the quality accounting of carbon nanotube is 1~4%, magnetic shield piece
Heat-sinking capability declined, this is because the content of carbon nanotube not enough caused by；When carbon nanotube quality accounting be 12~
When 15%, the heat-sinking capability of magnetic shield piece also declines, and it is multilayer laminated that reason is that carbon nanotube is formed in ink, leads to heat
Amount can not high efficient radiation go out.Therefore, the quality accounting of the suitable carbon nanotube in terms of the quality of ink is 6~11%.
The contactless charging magnetic shield piece of embodiment 4, with embodiment 3 the difference is that, in embodiment 4,
It include graphene in the composition of heat dissipating layer 1, in the heat dissipating layer 1, in terms of the quality of the ink after solidifying, the quality accounting of graphene
It is 15%.
In embodiment 4, the mixture of graphene and ink the preparation method comprises the following steps: by the aqueous polyurethane emulsion of 35.48g
9900 with the carbitol of dioctyl sulfosuccinate GR-7M, 3.59g of pH adjusting agent AMP-95,0.79g of 1.27g and
The deionized water of 20.27g is mixed into aqueous polyurethane solution；Again by the mass concentration of aqueous polyurethane solution and 483g obtained
The dispersion of merga pass dispersion machine is mixed for the aqueous liquid dispersion and aqueous polyurethane solution of 1.5% graphene, with the revolving speed of 1000rpm
Dispersion 10 minutes to get the mixture for arriving graphene and ink.
The heat dissipation effect of the contactless charging magnetic shield piece of embodiment 4 is tested: coil and the non-of embodiment 4 are connect
Touch charging is fitted with magnetic shield piece, is placed on cradle, and charged state is at, and wherein charging end uses the U.S.
The P9242 chip of Integrated Device Technology, Icn company, the output power of 10W.In magnetic shield piece
K-type thermocouple and Agilent 34970A data collector are placed in surface respectively, are measured under the different charging time in charging mode
The heat dissipating layer of magnetic shield piece and the surface temperature of magnetic alloy layer, measurement result are shown in Table 3.
Table 3: the magnetic shield piece surface temperature measurement result of the embodiment 4 under charge mode
Change the quality accounting of graphene in the heat dissipating layer of the contactless charging magnetic shield piece of embodiment 4 (with solid
The quality meter of ink after change), using with the contactless charging of the embodiment 4 identical measurement method of magnetic shield piece, survey
The surface temperature of the heat dissipating layer of magnetic shield piece, measurement result are shown in Table 4 after amount charging 30 minutes.
Table 4: the surface temperature of the heat dissipating layer of the magnetic shield piece of different graphene quality accountings after charging 30 minutes
As seen from Table 4, in heat dissipating layer 1, the quality accounting of the graphene in terms of the quality of the ink after solidifying is 7~15%
When, magnetic shield piece has preferable heat-sinking capability；When the quality accounting of graphene is 1~6%, the heat dissipation of magnetic shield piece
Ability is declined, this is because the content of graphene is not caused enough；When the quality accounting of graphene is 17%, magnetic shield
The heat-sinking capability of piece also declines, and it is multilayer laminated that reason is that graphene is formed in ink, cause heat can not high efficient radiation go out
It goes.Therefore, the quality accounting of the suitable graphene in terms of the quality of ink is 7~15%.
The contactless charging magnetic shield piece of embodiment 5, with embodiment 3 the difference is that, in embodiment 5,
Include carbon nanotube in the composition of heat dissipating layer 1, heat dissipating layer 1 with a thickness of 10 μm, heat dissipating layer 1 by carbon nanotube and glue mixing
Object is sprayed and is heating and curing to be formed, and heating temperature is 80 DEG C, and heating time is 3~5min.
In embodiment 5, the mixture of carbon nanotube and glue the preparation method comprises the following steps: being by the content of carbon nanotubes of 28g
12% N-Methyl pyrrolidone dispersion liquid TNNIM, mixes with acrylic acid adhesive YT8005, is prepared into carbon nanotube propylene
Sour adhesive.
The heat dissipation effect of the contactless charging magnetic shield piece of embodiment 5 is tested: coil and the non-of embodiment 5 are connect
Touch charging is fitted with magnetic shield piece, is placed on cradle, and charged state is at, and wherein charging end uses the U.S.
The P9242 chip of Integrated Device Technology, Icn company, the output power of 10W.In magnetic shield piece
K-type thermocouple and Agilent 34970A data collector are placed in surface respectively, are measured under the different charging time in charging mode
The heat dissipating layer of magnetic shield piece and the surface temperature of magnetic alloy layer, measurement result are shown in Table 5.
Table 5: the magnetic shield piece surface temperature measurement result of the embodiment 4 under charge mode
The contactless charging magnetic shield piece of embodiment 6, with embodiment 5 the difference is that, in embodiment 6,
Include graphene in the composition of heat dissipating layer 1, heat dissipating layer 1 with a thickness of 10 μm, heat dissipating layer 1 is passed through by the mixture of graphene and glue
It sprays and is heating and curing to be formed, heating temperature is 150 DEG C, heating time 5min.
In embodiment 6, the mixture of graphene and glue the preparation method comprises the following steps: by the graphene content of 140g be 1.5%
N-Methyl pyrrolidone dispersion liquid TNNIM, mixed with acrylic acid adhesive YT8005, be prepared into graphene acrylic acid gluing
Agent.
The heat dissipation effect of the contactless charging magnetic shield piece of embodiment 6 is tested: coil and the non-of embodiment 6 are connect
Touch charging is fitted with magnetic shield piece, is placed on cradle, and charged state is at, and wherein charging end uses the U.S.
The P9242 chip of Integrated Device Technology, Icn company, the output power of 10W.In magnetic shield piece
K-type thermocouple and Agilent 34970A data collector are placed in surface respectively, are measured under the different charging time in charging mode
The heat dissipating layer of magnetic shield piece and the surface temperature of magnetic alloy layer, measurement result are shown in Table 6.
Table 6: the magnetic shield piece surface temperature measurement result of the embodiment 6 under charge mode
Claims (14)
1. contactless charging magnetic shield piece, which is characterized in that the magnetic shield piece includes: longitudinally superimposed several layers magnetic
Property alloy-layer, magnetic alloy layer described in every layer forms by multi-disc ptmn alloy film is horizontally-spliced, magnetism described at least one layer
At least one surface of alloy-layer is provided with heat dissipating layer, includes in carbon nanotube and graphene in the composition of the heat dissipating layer
One or two kinds of mixtures.
2. contactless charging magnetic shield piece according to claim 1, which is characterized in that magnetism described in single layer is closed
Layer gold with a thickness of 10~30 μm, heat dissipating layer described in single layer with a thickness of 0.1~30 μm, the thickness of adhesive layer described in single layer
Degree is 1~30 μm.
3. contactless charging magnetic shield piece according to claim 2, which is characterized in that heat dissipating layer described in single layer
With a thickness of 2~10 μm.
4. contactless charging magnetic shield piece according to claim 2, which is characterized in that adhesive layer described in single layer
With a thickness of 1~10 μm.
5. contactless charging magnetic shield piece according to claim 2, which is characterized in that magnetism described in single layer is closed
Layer gold with a thickness of 12~18 μm.
6. contactless charging magnetic shield piece according to claim 1, which is characterized in that the multi-disc magnetism is closed
Insulating layer is provided between the piece and piece of gold plaque.
7. contactless charging magnetic shield piece according to claim 1, which is characterized in that the heat dissipating layer is by carbon
The mixture of nanotube and/or graphene and ink is coated and is heating and curing and to be formed, in the heat dissipating layer, with the ink after solidifying
Quality meter, the quality accounting of carbon nanotube and/or graphene is 5~35 %.
8. contactless charging magnetic shield piece according to claim 7, which is characterized in that the heat dissipating layer is by carbon
The mixture of nanotube and ink is coated and is heating and curing and to be formed, in the heat dissipating layer, in terms of the quality of the ink after solidifying, and carbon
The quality accounting of nanotube is 6~11 %；Alternatively, the heat dissipating layer is coated by the mixture of graphene and ink and heats
It is formed by curing, in the heat dissipating layer, in terms of the quality of the ink after solidifying, the quality accounting of graphene is 7~15 %.
9. contactless charging magnetic shield piece according to claim 7, which is characterized in that include in the ink
There are polyurethane resin, epoxy resin, acrylic resin, ethylene-vinyl acetate resin, carbamide resin, phenolic resin, cellulose
Resin, organic siliconresin, nitrocellulose resin, polyester resin, amino resins, polyolefin resin, chlorinated polyolefin resin and
At least one of alkyd resin.
10. it is according to claim 1 it is contactless charging use magnetic shield piece, which is characterized in that the heat dissipating layer by
The mixture of carbon nanotube and/or graphene and glue is sprayed and is heating and curing to be formed, in the heat dissipating layer, with the glue after solidifying
The quality accounting of the quality meter of water, carbon nanotube and/or graphene is 5~35 %.
11. contactless charging magnetic shield piece according to claim 10, which is characterized in that wrapped in the glue
Contain at least one in acrylic resin, polyurethane resin, epoxy resin, ethylene-vinyl acetate resin and organic siliconresin
Kind.
12. contactless charging magnetic shield piece according to claim 1, which is characterized in that magnetism described in every layer
The unilateral or bilateral of alloy-layer is provided with adhesive layer, and surface or the setting of the magnetic alloy layer is arranged in the adhesive layer
On the surface of the heat dissipating layer, the adhesive layer be double faced adhesive tape with substrate or by polyacrylate, epoxy resin,
One of polyurethane resin, polyethylene terephthalate, acrylic resin, polyvinyl resin and organic siliconresin or two
Kind or more mixture composition the adhesive layer without substrate.
13. contactless charging magnetic shield piece described in any one of -12 according to claim 1, which is characterized in that every layer
The magnetic alloy layer is made of Fe-based amorphous alloy or iron-base nanometer crystal alloy, with a thickness of 12~30 μm；The iron
Base noncrystal alloy is Fe-Si-B Fe-based amorphous alloy or Fe-Si-B-Co Fe-based amorphous alloy, the iron-base nanometer crystal alloy
For Fe-Si-B-Cu-Nb iron-base nanometer crystal alloy.
14. contactless charging of any of claims 1-13 is with magnetic shield piece in mobile phone, wrist-watch, glasses, hand
Ring, tablet computer, notebook, unmanned plane, sound equipment, mouse, e-book, earphone, TV, the application in charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810007294.9A CN110010331A (en) | 2018-01-04 | 2018-01-04 | Contactless charging magnetic shield piece and its application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810007294.9A CN110010331A (en) | 2018-01-04 | 2018-01-04 | Contactless charging magnetic shield piece and its application |
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| Publication Number | Publication Date |
|---|---|
| CN110010331A true CN110010331A (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810007294.9A Pending CN110010331A (en) | 2018-01-04 | 2018-01-04 | Contactless charging magnetic shield piece and its application |
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| CN (1) | CN110010331A (en) |
Cited By (4)
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| CN110564335A (en) * | 2019-08-13 | 2019-12-13 | 深圳烯湾科技有限公司 | Carbon nano tube electromagnetic shielding heat dissipation film and preparation method thereof |
| CN113380506A (en) * | 2021-06-08 | 2021-09-10 | 横店集团东磁股份有限公司 | Power type thin film inductance magnetic sheet and preparation method and application thereof |
| CN113993365A (en) * | 2021-10-28 | 2022-01-28 | 横店集团东磁股份有限公司 | Magnetic shielding structure for wireless charging and preparation method thereof |
| CN117497681A (en) * | 2023-12-29 | 2024-02-02 | 南昌凯捷半导体科技有限公司 | Mini-LED chip and manufacturing method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564335A (en) * | 2019-08-13 | 2019-12-13 | 深圳烯湾科技有限公司 | Carbon nano tube electromagnetic shielding heat dissipation film and preparation method thereof |
| CN113380506A (en) * | 2021-06-08 | 2021-09-10 | 横店集团东磁股份有限公司 | Power type thin film inductance magnetic sheet and preparation method and application thereof |
| CN113380506B (en) * | 2021-06-08 | 2022-06-24 | 横店集团东磁股份有限公司 | Power type thin film inductance magnetic sheet and preparation method and application thereof |
| CN113993365A (en) * | 2021-10-28 | 2022-01-28 | 横店集团东磁股份有限公司 | Magnetic shielding structure for wireless charging and preparation method thereof |
| CN117497681A (en) * | 2023-12-29 | 2024-02-02 | 南昌凯捷半导体科技有限公司 | Mini-LED chip and manufacturing method thereof |
| CN117497681B (en) * | 2023-12-29 | 2024-04-05 | 南昌凯捷半导体科技有限公司 | Mini-LED chip and manufacturing method thereof |
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Application publication date: 20190712 |
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