CN206640942U - Electromagnetic shielding uses composite laminate magnetic material structures - Google Patents
Electromagnetic shielding uses composite laminate magnetic material structures Download PDFInfo
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- CN206640942U CN206640942U CN201720223318.5U CN201720223318U CN206640942U CN 206640942 U CN206640942 U CN 206640942U CN 201720223318 U CN201720223318 U CN 201720223318U CN 206640942 U CN206640942 U CN 206640942U
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Abstract
The utility model provides a kind of electromagnetic shielding and uses composite laminate magnetic material structures, and the electromagnetic shielding composite laminate magnetic material structures include：Magnetically soft alloy strip material structure, including at least one layer of magnetically soft alloy steel band bed of material；Ferrite magnetic material layer or magnetic class glue material layer, adhere on the surface of the magnetically soft alloy strip material structure.The electromagnetic shielding of the present utility model is that the composite lamainated structure for including the magnetically soft alloy steel band bed of material and ferrite magnetic material layer or magnetic class glue material layer can integrate the performance advantages of two kinds of materials with composite laminate magnetic material structures, with good magnetism isolating effect, heating energy consumption problem is reduced, the applying frequency of magnetic material is widened significantly（100kHz~20MHz）, the wireless charging electromagnetic shielding demand such as Qi and A4WP can be met simultaneously, had great importance to improving its charge efficiency and charging distance.
Description
Technical field
The utility model belongs to magnetic material in the wireless power transmission of power electronics magnetic cell and electromagnetic shielding application neck
Domain, more particularly to a kind of electromagnetic shielding composite laminate magnetic material structures.
Background technology
In recent years, with the popularization of smart mobile phone, digital camera, tablet personal computer and other small portable mobile devices,
The habits and customs of people have had a very large change, and portable electric appts have turned into essential in people's Working Life
One of instrument.Increasingly abundanter with the habits and customs of people, the type requirements of its electronic equipment are also more and more various, function
(such as wireless charging) is increasingly stronger, and for its power consumption also with growth, portable electric appts then need progress frequent charge
Maintain normal use.The processes such as wired charging and data exchange due to conventional electronic devices are required to a set of respective charger
Carried out with data wire, result in current electronic equipment charging inlet and charger and data wire it is extremely numerous and diverse and more, and
And often plug easily causes data wire and the interface damage of electronic equipment, the Working Life trip to people is brought greatly
Puzzlement.If electronic equipment uses wireless charging technology, substantial amounts of charger and data wire can be saved, solves charger
The problem of huge waste of the resources such as data wire, while can also solve the unmatched problem of interface of current electronic equipment, significantly
Facilitate the Working Life custom of people.
Wireless charging technology, it is that electric energy is sent into electricity consumption from power supply transmitting end-coil (more than 100kHz) to receive end line
Circle, and be the technology that is charged of battery of equipment.It is, in principle, that wireless charging technology mainly has three kinds, induction,
Magnetic resonance type, radio waves type etc..Due to the popularization in technology and market, it is big that wireless charging professional standard has also correspondingly formed three
Alliance organization WPC, A4WP and PMA (A4WP and PMA have merged into Airfuel) each have more than ten companies to be added thereto.WPC
Induction wireless charging is laid particular emphasis on, power frequency is 100~200kHz, and charge efficiency is higher, but charging distance is only 5mm
Within, represent enterprise have Samsung, Huawei, in emerging, Nokia, Motorola, HTC, OPPO, LG, Google, Philip etc..And
Airfuel pays attention to magnetic resonance type wireless charging, and power frequency 6.78MHz, charge efficiency is moderate, and its charging room is away from can reach
Several meters of distance, representing enterprise has Fujitsu, Sony, high pass, WiTricity etc..Presently the most ripe technology is electromagnetism sense
The wireless charging technology of mode is answered, possesses the potentiality that high-volume promotes production.Since in March, 2015, Samsung mobile phone is from its flagship
Model Galaxy S6 start just layout wireless charging function, and later mobile phone model supports wireless charging function, many
Other brand mobile phones also begin to fall over each other to imitate it to use wireless charging function.
Wireless charging technology for improve its charge efficiency and apart from when, generally can pass through improve power supply transmitting end-coil
Power frequency solve, but before this, first also need to solve electromagnetic wave to generate heat to battery of mobile phone and the metal parts of surrounding
Influence problem, typically when to mobile phone wireless charging, one higher magnetic conductivity material is placed between the coil back side and battery
The antifreeze plate of material provides magnetic conduction passage come the electromagnetic wave sent for power supply transmitting end-coil, reduces electromagnetic wave to battery and its surrounding
Mobile phone miscellaneous part vortes interference, usual this eddy current effect can convert electrical energy into heat energy to losing, so as to reduce
The induced-current of receiving coil.When power frequency is higher, vortex is bigger, and the energy lost is also bigger, wireless charging
Efficiency is lower.In addition, when the electric current of wireless charging is larger, it is also possible to the antifreeze plate at the coil back side can be caused saturation occur and showed
As once saturation exception occurs in antifreeze plate, then the electromagnetic wave that Wireless charging coil is sent can enter mobile phone through antifreeze plate
In battery and surrounding metal, and serious heating functioin is produced, ultimately result in wireless charging efficiency decline.
Magnetically soft alloy strip material has high saturated magnetic induction (0.8~2.0T), high magnetic permeability, low-loss due to it
Power electronics magnetic cell field is widely used in etc. excellent soft magnet performance, therefore it can also enter as wireless charging antifreeze plate
Exercise and use.But limited by its material is applicable frequency, only to go out its excellent for the competence exertion within 500kHz for its applying frequency
Performance (μ " is 40~60), when frequency reaches more than 3MHz, the magnetic conductivity of magnetically soft alloy strip material declines by a big margin, and magnetic
Obvious (the μ " of damage increase>140) it, can not meet that electronic equipment uses (such as Fig. 1, wherein solid line are magnetic conductivity, and dotted line is magnetic loss).
And ferrite, magnetic class glue material, because its resistivity is big, mutually insulated between magnetic powder particle, kelvin effect is smaller, its high frequency (<
Higher magnetic conductivity (μ ' can also be maintained when 20MHz)>, and the relatively low (μ " of its magnetic loss 100)<50), (such as Fig. 2 and Fig. 3, its
In, solid line is magnetic conductivity, and dotted line is magnetic loss) but its low frequency (<Magnetic conductivity when 500kHz) can not show a candle to magnetically soft alloy strip material,
Its saturation induction density (0.2~0.45T) is also less than 1/3rd of magnetically soft alloy strip material, if it is wireless in high current
During charging, saturation exception easily occurs in Ferrite Material, so as to lose the function every magnetic, or even burns battery and electronic equipment
Deng the magnetic conductivity temperature characterisitic of ferrite magnetic material fluctuation compared with the magnetic conductivity temperature characterisitic of magnetically soft alloy strip material in addition
Larger, when temperature is higher than 40 DEG C, magnetic conductivity declines substantially, and particularly when higher than 100 DEG C, magnetic conductivity drastically declines.And
When low temperature is less than -20 DEG C, magnetic conductivity also drastically declines.Therefore, the change of its magnetic conductivity temperature stability too greatly, is unfavorable for wireless charging
Electricity electromagnetic shielding is used.
Utility model content
In view of the above the shortcomings that prior art, the purpose of this utility model is to provide a kind of be electromagnetically shielded with compound
Laminated magnetic material structure, for solving in the prior art only with magnetically soft alloy strip material as existing for wireless charging piece
When frequency reaches more than 3MHz, the magnetic conductivity of magnetically soft alloy strip material declines by a big margin, and magnetic loss increase is obvious, can not
Meet the problem of electronic equipment uses, and only with ferrite, magnetic class glue material as existing for wireless charging piece during low frequency
Magnetic conductivity can not show a candle to magnetically soft alloy strip material, its saturation induction density also less than magnetically soft alloy strip material three/
One, if it in high current wireless charging, saturation exception easily occurs in Ferrite Material, so as to lose the function every magnetic, very
To burning battery and electronic equipment etc., and due to the change of its magnetic conductivity temperature stability too greatly, it is unfavorable for wireless charging electromagnetism
The problem of shielding is used.
In order to achieve the above objects and other related objects, the utility model provides a kind of electromagnetic shielding and uses composite laminate magnetic
Material structure, the electromagnetic shielding composite laminate magnetic material structures include：
Magnetically soft alloy strip material structure, including at least one layer of magnetically soft alloy steel band bed of material；
Ferrite magnetic material layer or magnetic class glue material layer, adhere on the surface of the magnetically soft alloy strip material structure.
A kind of preferred scheme as electromagnetic shielding of the present utility model with composite laminate magnetic material structures, the electromagnetism
Shielding composite laminate magnetic material structures also include：
Diaphragm, the magnetically soft alloy strip material structure is adhered on away from the ferrite magnetic material layer or the magnetic
The surface of powder class glue material layer；
First PET mould release membrances, adhere on surface of the diaphragm away from the magnetically soft alloy strip material structure；
2nd PET mould release membrances, the ferrite magnetic material layer or the magnetic class glue material layer are adhered on away from described soft
The surface of magnetic alloy strip material structure.
A kind of preferred scheme as electromagnetic shielding of the present utility model with composite laminate magnetic material structures, the soft magnetism
Alloyed steel strip material structure includes relative first surface and second surface, the first table of the magnetically soft alloy strip material structure
Face and second surface are equipped with the first adhesive layer；The ferrite magnetic material layer or the magnetic class glue material layer are via described
One adhesive layer adheres on the first surface of the magnetically soft alloy strip material structure；The diaphragm is via first adhesive layer
Adhere on the second surface of the magnetically soft alloy strip material structure；The 2nd PET mould release membrances post via the second adhesive layer
In the surface of the ferrite magnetic material layer or the magnetic class glue material layer away from the magnetically soft alloy strip material structure.
A kind of preferred scheme as electromagnetic shielding of the present utility model with composite laminate magnetic material structures, the soft magnetism
Alloyed steel strip material structure is to include the magnetically soft alloy steel band bed of material described in multilayer and handed over the magnetically soft alloy steel band bed of material
For the laminated construction of the 3rd stacked adhesive layer.
A kind of preferred scheme as electromagnetic shielding of the present utility model with composite laminate magnetic material structures, the soft magnetism
Alloyed steel strip material structure is banded structure, and ferrite magnetic material layer or magnetic class the glue material layer is banded structure.
A kind of preferred scheme as electromagnetic shielding of the present utility model with composite laminate magnetic material structures, the electromagnetism
Shielding composite laminate magnetic material structures also include anticorrosive coat, and the anticorrosive coat is at least completely covered the exposed soft magnetism and closed
The side and end face of the golden steel band bed of material, and the exposed ferrite magnetic material layer or the magnetic class is at least completely covered
The side and end face of glue material layer.
The utility model also provides a kind of preparation method of electromagnetic shielding composite laminate magnetic material structures, the preparation
Method comprises the following steps：
1) magnetically soft alloy strip material structure is prepared, the magnetically soft alloy strip material structure is closed including at least one layer of soft magnetism
The golden steel band bed of material；
2) ferrite magnetic material layer or magnetic class glue material layer are prepared；
3) the magnetically soft alloy strip material structure is adhered on into ferrite magnetic material layer or magnetic the class glue material layer
Surface.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, in step 1), prepare magnetically soft alloy strip material structure and comprise the following steps：
The magnetically soft alloy steel band bed of material 1-1) is provided；
1-2) the magnetically soft alloy steel band bed of material is made annealing treatment.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, in step 1), prepare magnetically soft alloy strip material structure and comprise the following steps：
The multilayer magnetically soft alloy steel band bed of material 1-1) is provided；
Laminated layer 1-2) is provided；
1-3) the magnetically soft alloy steel band bed of material is replaced with the adhesive layer and fit together, includes multilayer to be formed
The lamination knot of the magnetically soft alloy steel band bed of material and the adhesive layer being alternately superimposed on the magnetically soft alloy steel band bed of material
Structure.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, step 1-1) and step 1-2) between also include the step of being made annealing treatment the magnetically soft alloy steel band bed of material.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, the magnetically soft alloy steel band bed of material is subjected to annealing and comprised the following steps：
The magnetically soft alloy steel band bed of material is wound into toroidal core；
By the toroidal core as in heat-treatment furnace；
The heat-treatment furnace is vacuumized in advance using vacuum-pumping valve and vavuum pump, and kept in the heat treatment
Vacuum pressure maintain -0,05MPa~-0.1MPa, the time persistently vacuumized is 10min~120min；
The vacuum valve and the vavuum pump are closed, tracheae charging valve is opened, guarantor is filled with into the heat-treatment furnace
Protect gas, it is ensured that inert atmosphere pressure closes the tracheae charging valve after being 0~0.1Mpa in the heat-treatment furnace；
The heat treatment in-furnace temperature is warming up to 200 DEG C~800 DEG C, room temperature is down to after being incubated 0.5h~4h.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, after step 1), in addition to the step of the magnetically soft alloy strip material structure is carried out into fragmentation processing.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, in step 2), prepare magnetic class glue material layer and comprise the following steps：
Soft magnetism powder 2-1) is provided；
Glue material 2-2) is provided；
Stirred after 2-3) the soft magnetism powder is mixed in proportion with the glue material, coated on PET polyester films
Carry out drawout；
2-4) by step 2-3) obtained structure carries out hot pressing and is thinned to can obtain the magnetic class glue material layer.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, step 3) also comprise the following steps afterwards：
4) diaphragm is provided, the diaphragm is adhered on into the magnetically soft alloy strip material structure away from the ferrite
The surface of magnetic material layer or magnetic class glue material layer；
5) PET mould release membrances are formed on surface of the diaphragm away from the magnetically soft alloy strip material structure, and in institute
State the surface of ferrite magnetic material layer or magnetic class glue material layer away from the magnetically soft alloy strip material structure and form the PET
Mould release membrance.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, step 5) also include afterwards：
6) the step of structure for obtaining step 5) is die cut, to obtain the finished product of required specification.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, the structure that step 5) is obtained also include after being die cut
7) the step of finished product of obtained required specification being subjected to preservative treatment.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, in step 7), the method that uses immersion inorganic coating agent, method, immersion inorganic coating agent and the resin for soaking resin shellac varnish
The laminating PET film of the method for shellac varnish or surface simultaneously carries out the method for pack edge reason and is prevented the finished product of obtained required specification
Corruption processing.
As described above, electromagnetic shielding of the present utility model uses composite laminate magnetic material structures, have the advantages that：
The electromagnetic shielding of the present utility model is to include the magnetically soft alloy steel band bed of material and iron oxygen with composite laminate magnetic material structures
The composite lamainated structure of body magnetic material layer or magnetic class glue material layer, in electromagnetic shielding composite laminate magnetic material structures
During as wireless charging antifreeze plate, both ensure that magnetically soft alloy strip material in lower frequency (<High magnetic permeability 500kHz)
Deng soft magnet performance, taken into account again ferrite, magnetic class glue material upper frequency (<Low loss characteristic when 20MHz), while examine again
Having considered the antifreeze plate at the coil back side prevents supersaturated exception in high current wireless charging, can using this composite lamainated structure
The performance advantage of comprehensive two kinds of materials, has good magnetism isolating effect, reduces heating energy consumption problem, and the applying frequency magnetic material is big
(100kHz~20MHz) is widened greatly, can meet the wireless charging electromagnetic shielding demand such as Qi and A4WP simultaneously, to improving its charging
Efficiency and charging distance have great importance.
Brief description of the drawings
Fig. 1 is shown as the magnetic spectrum curve map of magnetically soft alloy strip material of the prior art.
Fig. 2 is shown as the magnetic spectrum curve map of ferrite magnetic material of the prior art.
Fig. 3 is shown as the magnetic spectrum curve map of magnetic class glue material of the prior art.
Fig. 4 to Fig. 6 is shown as the electromagnetic shielding composite laminate magnetic material knot provided in the utility model embodiment one
The cross section structure schematic diagram of structure, wherein, the iron oxygen of the electromagnetic shielding in composite laminate magnetic material structures in Fig. 5
Body magnetic material layer or magnetic class glue material layer are ferrite magnetic material layer, the electromagnetic shielding composite laminate magnetic in Fig. 6
Ferrite magnetic material layer or magnetic class the glue material layer in property material structure is magnetic class glue material layer.
The electromagnetic shielding that Fig. 7 is shown as providing in the utility model embodiment one is with composite laminate magnetic material structures
The cross section structure schematic diagram of magnetically soft alloy strip material structure.
Fig. 8 is shown as the magnetic spectrum curve map of the electromagnetic shielding composite laminate magnetic material structures in Fig. 5.
Fig. 9 is shown as the magnetic spectrum curve map of the electromagnetic shielding composite laminate magnetic material structures in Fig. 6.
Figure 10 is shown as the electromagnetic shielding composite laminate magnetic material structures provided in the utility model embodiment four
The flow chart of preparation method.
Component label instructions
1 magnetically soft alloy strip material structure
The 11 magnetically soft alloy steel band bed of materials
12 the 3rd adhesive layers
2 ferrite magnetic materials or magnetic class glue material layer
21 ferrite magnetic material layers
22 magnetic class glue material layers
3 diaphragms
4 the oneth PET mould release membrances
5 the 2nd PET mould release membrances
6 first adhesive layers
7 second adhesive layers
Embodiment
Illustrate embodiment of the present utility model below by way of specific instantiation, those skilled in the art can be by this theory
Content disclosed by bright book understands other advantages and effect of the present utility model easily.The utility model can also be by addition
Different embodiments are embodied or practiced, and the various details in this specification can also be based on different viewpoints with answering
With, without departing from it is of the present utility model spirit under carry out various modifications or alterations.
Fig. 4 is referred to Figure 10.It should be noted that the diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of utility model, though when the component relevant with the utility model is only shown in diagram rather than being implemented according to reality
Component count, shape and size are drawn, and it is actual when implementing form, quantity and the ratio of each component can be a kind of changing arbitrarily
Become, and its assembly layout form may also be increasingly complex.
Embodiment one
Fig. 4 and Fig. 6 is referred to, the utility model provides a kind of electromagnetic shielding and uses composite laminate magnetic material structures, described
Electromagnetic shielding composite laminate magnetic material structures include：Magnetically soft alloy strip material structure 1, the magnetically soft alloy strip material
Structure 1 includes at least one layer of magnetically soft alloy steel band bed of material 11；Ferrite magnetic material layer or magnetic class glue material layer 2, the iron
Oxysome magnetic material layer or magnetic class glue material layer 2 adhere on the surface of the magnetically soft alloy strip material structure 1.
As an example, the material of the magnetically soft alloy steel band bed of material 11 can be electrical pure iron, it is grain-oriented Si steel sheet, super
Silicon steel sheet, permalloy or amorphous nano peritectic alloy (1k101,1k102,1k103,1k104,1k105,1k106,1k107,
1k201,1k502 etc.), saturation flux density Bs=0.8T~2.0T of the magnetically soft alloy steel band bed of material 11.
As an example, the magnetically soft alloy steel band bed of material 11 is the magnetically soft alloy steel band bed of material by annealing.
As an example, the ferrite magnetic material layer in the ferrite magnetic material layer or magnetic class glue material layer 2
21 material is Mn-Zn, Ni-Zn or Cu-Mg-Zn etc., the saturation flux density Bs=of the ferrite magnetic material layer 21
0.2T~0.4T；The magnetic class glue material layer 22 in ferrite magnetic material layer or magnetic class the glue material layer 2 is by soft magnetism
Powder stirs by a certain percentage with glue material, and coats stream edge and drawout is carried out on PET mylars, then delivers to hot press
Structure obtained from upper progress hot pressing is thinned；Wherein, the soft magnetism powder can be Fe-Si alloyed powders, Fe-Si-Al alloyed powders,
Fe-Ni alloy/C powder, Fe-Ni-Mo alloyed powders, Fe-Si-B alloyed powders or Fe-Si-B-Cu-Nb alloyed powders etc., the soft magnetism powder
Saturation flux density Bs=0.8T~1.5T, the grain graininess of the soft magnetism powder is 100~800 mesh；The glue material can be with
For epoxy resin, acrylic resin, butyl rubber or isopropyl rubber etc..The electromagnetic shielding composite laminate of the present utility model
Magnetic material structures are to include the magnetically soft alloy steel band bed of material 11 and the ferrite magnetic material layer or magnetic class glue material
The composite lamainated structure of layer 2, when the electromagnetic shielding is used as wireless charging antifreeze plate with composite laminate magnetic material structures, both
Ensure that magnetically soft alloy strip material in lower frequency (<The soft magnet performances such as high magnetic permeability 500kHz), iron oxygen has been taken into account again
Body, magnetic class glue material upper frequency (<Low loss characteristic when 20MHz), the single magnetic material in a certain frequency range can be made up
Electromagnetic performance deficiency, while it is also contemplated that the antifreeze plate at the coil back side prevents that in high current wireless charging supersaturation is different
Often, the performance advantage of two kinds of materials can be integrated using this composite lamainated structure, there is good magnetism isolating effect, reduces heating energy
Consumption problem, and the instability mode of ferrite magnetic performance in high temperature can be reduced and the elegant possibility of magnetic property occurs, magnetic material
Applying frequency widen (100kHz~20MHz) significantly, the wireless charging electromagnetic shielding demand such as Qi and A4WP can be met simultaneously.
As an example, the electromagnetic shielding composite laminate magnetic material structures also include：Diaphragm 3, the diaphragm 3
Adhere on surface of the magnetically soft alloy strip material structure 1 away from the ferrite magnetic material layer or magnetic class glue material layer 2；
First PET mould release membrances 4, the first PET mould release membrances 4 adhere on the diaphragm 3 away from the magnetically soft alloy strip material knot
The surface of structure 1；2nd PET mould release membrances 5, the 2nd PET mould release membrances 5 adhere on the ferrite magnetic material layer or magnetic class
Surface of the glue material layer 2 away from the magnetically soft alloy strip material structure 1.
As an example, the diaphragm 3 is black protective film, its material can be graphite heat-conducting fin.The electromagnetic shielding
With composite laminate magnetic material structures by setting the diaphragm 3, be advantageous to the electromagnetic shielding composite laminate magnetic material
Heat caused by lamination magnetic material internal in material structure disperses outward, it is ensured that the electromagnetic shielding uses composite laminate magnetic material
Expect that inside configuration heating is smaller.
As an example, the magnetically soft alloy strip material structure 1 includes relative first surface and second surface, it is described soft
The first surface and second surface of magnetic alloy strip material structure 1 are equipped with the first adhesive layer 6；The ferrite magnetic material layer
Or the magnetic class glue material layer 2 adheres on the first table of the magnetically soft alloy strip material structure 1 via first adhesive layer 6
Face；The diaphragm 3 adheres on the second surface of the magnetically soft alloy strip material structure 1 via first adhesive layer 6；Institute
Stating the 2nd PET mould release membrances 5, via the second adhesive layer 7 to adhere on ferrite magnetic material layer or magnetic the class glue material layer 2 remote
The surface of the magnetically soft alloy strip material structure 1.
In one example, as shown in figure 5, the ferrite magnetic material layer or magnetic class glue material layer 2 are the ferrite
Magnetic material layer 21, Fig. 8 are the magnetic spectrum curve map of the electromagnetic shielding composite laminate magnetic material structures in Fig. 5；Show another
In example, as shown in fig. 6, the ferrite magnetic material layer or magnetic class glue material layer 2 are the magnetic class glue material layer 2, Fig. 9 is figure
The magnetic spectrum curve map of electromagnetic shielding composite laminate magnetic material structures in 6.
As an example, as shown in fig. 7, the magnetically soft alloy strip material structure 1 is to include magnetically soft alloy steel described in multilayer
The laminated construction of the band bed of material 11 and the 3rd adhesive layer 12 being alternately superimposed on the magnetically soft alloy steel band bed of material 11.
As an example, first adhesive layer 6, second adhesive layer 7 and the 3rd adhesive layer 12 can be but
It is not limited only to double faced adhesive tape.
In one example, the electromagnetic shielding is banded structure with composite laminate magnetic material structures, i.e., described soft magnetism closes
Golden strip material structure 1 is banded structure, and ferrite magnetic material layer or magnetic class the glue material layer 2 is banded structure.
In another example, the electromagnetic shielding composite laminate magnetic material structures are with specified specification
Granular texture, i.e., described magnetically soft alloy strip material structure 1 are the nutty structure with specified specification, the ferrite
Magnetic material layer or magnetic class glue material layer 2 are the nutty structure with specified specification.
It is of the present utility model it is described electromagnetic shielding use composite laminate magnetic material structures in each magnetic material layer between
Kept apart by two-sided gluing knot, i.e., described magnetically soft alloy strip material structure 1 and the ferrite magnetic material layer or magnetic
Kept apart between powder class glue material layer 2 by two-sided gluing knot, and described in each layer in the magnetically soft alloy strip material structure 1
Keep apart between the magnetically soft alloy steel band bed of material 11 also by two-sided gluing knot, and due to the magnetically soft alloy strip material
To carry out being fragmented into a series of banded structure or particulate structure by special design of scattered small flowers and plants technique, this is advantageously reduced layer 11
Eddy-current loss of the electromagnetic shielding in composite laminate magnetic material structures, improves its high frequency characteristics.
As an example, the electromagnetic shielding also includes anticorrosive coat (not shown) with composite laminate magnetic material structures, it is described
The side and end face of the exposed magnetically soft alloy steel band bed of material 1 is at least completely covered in anticorrosive coat, and is at least completely covered naked
The side and end face of ferrite magnetic material layer or magnetic class the glue material layer 2 of dew.
The anticorrosive coat can be that inorganic coating agent protection film layer, resin glue enamelled coating, PET mould release membrances or inorganic coating agent are protected
Cuticular layer and resin glue enamelled coating；Wherein, the inorganic coating agent protection film layer can be but be not limited only to phosphate or chromate
Protection film layer, the resin glue enamelled coating can be but be not limited only to epoxy resin, polyester resin, acrylic resin, alkyd resin
Or varnish etc..By that, with the anticorrosive coat is set in composite laminate magnetic material structures, can be avoided in the electromagnetic shielding
The magnetically soft alloy steel band bed of material 1 and the ferrite magnetic material layer or magnetic class glue material layer 2 are in related extreme environment
The stability of its electromagnetic performance is had influence on because corrosion occurs.
Embodiment two
Figure 10 is referred to incorporated by reference to Fig. 4 to Fig. 7, the utility model also provides a kind of electromagnetic shielding composite laminate magnetic material
The preparation method of structure, the preparation method are suitable to prepare the electromagnetic shielding composite laminate magnetic material described in embodiment one
Structure, the preparation method of the electromagnetic shielding composite laminate magnetic material structures comprise the following steps：
1) magnetically soft alloy strip material structure is prepared, the magnetically soft alloy strip material structure is closed including at least one layer of soft magnetism
The golden steel band bed of material；
2) ferrite magnetic material layer or magnetic class glue material layer are prepared；
3) the magnetically soft alloy strip material structure is adhered on into ferrite magnetic material layer or magnetic the class glue material layer
Surface.
In step 1), the S1 steps in Figure 10 are referred to, prepare magnetically soft alloy strip material structure 1, the soft magnetism closes
Golden strip material structure 1 includes at least one layer of magnetically soft alloy steel band bed of material 11.
In one example, magnetically soft alloy strip material structure 1 is prepared to comprise the following steps：
The magnetically soft alloy steel band bed of material 11 1-1) is provided；
1-2) the magnetically soft alloy steel band bed of material 11 is made annealing treatment.
As an example, step 1-1) in, the material of the magnetically soft alloy steel band bed of material 11 can be electrical pure iron, orientation
Silicon steel sheet, super silicon steel sheet, permalloy or amorphous nano peritectic alloy (1k101,1k102,1k103,1k104,1k105,
1k106,1k107,1k201,1k502 etc.), the saturation flux density Bs=0.8T of the magnetically soft alloy steel band bed of material 11~
2.0T；The width of the magnetically soft alloy steel band bed of material 11 can be 50mm~200mm, and thickness can be 16 μm~350 μm.
As an example, step 1-2) in, specific method that the magnetically soft alloy steel band bed of material 11 is made annealing treatment
For：
1-2-1) the magnetically soft alloy steel band bed of material 11 is wound in the toroidal core with certain internal diameter specification；
1-2-2) toroidal core of winding is positioned on bin pallet, is spaced between the adjacent toroidal core
Certain spacing, then the bin pallet with the toroidal core is delivered in heat-treatment furnace, and close sealing fire door；
1-2-3) heat-treatment furnace is vacuumized in advance, and the vacuum pressure value in holding furnace maintain-
0.05MPa~-0.1MPa, the time persistently vacuumized are 10min~120min；It is then shut off vacuum-pumping valve and vavuum pump；
Tracheae charging valve is opened, protective gas (for example N is filled with into the heat-treatment furnace2、H2Or Ar etc.), it is ensured that indifferent gas in stove
Atmosphere pressure is 0MPa~0.1MPa, is then shut off charging valve；
1-2-4) startup power supply heating carries out being warming up to (for example, 200 DEG C of certain temperature according to required annealing process curve
~800 DEG C), insulation a period of time (for example, 0.5h~4h) is then carried out, room temperature is finally cooled to and comes out of the stove and complete annealing process.
In annealing process, the magnetically soft alloy steel band bed of material 11 is due to the diffusion of interior atoms, its knot of tissue
Relaxation occurs for structure, and its internal residual internal stress will eliminate and separate out small (nanoscale) grain structure, so as to improve its soft property
Energy.
In another example, magnetically soft alloy strip material structure is prepared to comprise the following steps：
The multilayer magnetically soft alloy steel band bed of material 11 1-1) is provided；
Laminated layer 1-2) is provided；
1-3) the magnetically soft alloy steel band bed of material 11 is replaced with the adhesive layer and fit together, to be formed including more
The layer magnetically soft alloy steel band bed of material 11 and the adhesive layer that is alternately superimposed on the magnetically soft alloy steel band bed of material 11
Laminated construction.
It should be noted that the adhesive layer herein is the 3rd adhesive layer 12 described in embodiment one.
As an example, step 1-1) and step 1-2) between also include the magnetically soft alloy steel band bed of material 11 is moved back
The step of fire processing；By the method that the non-retentive alloy steel band bed of material 11 is made annealing treatment and moving back in an above-mentioned example
Fiery processing method is identical, is not repeated herein.
As an example, after step 1), in addition to the magnetically soft alloy strip material structure 1 is carried out to the step of fragmentation processing
Suddenly.Specifically, first, by one layer of magnetically soft alloy steel band bed of material 11 with one layer of double faced adhesive tape is laminating bonds together；Then
The magnetically soft alloy steel band bed of material 11 being pasted onto on double faced adhesive tape is passed through into special fragmentation machine (mechanical disintegration, ultrasonic wave
Fragmentation etc.) processing, by the 11 uniform fragmentation of the magnetically soft alloy steel band bed of material, by fine particle, (particle diameter is in a series of uniformly
0.1mm~5mm) composition magnetically soft alloy steel band bar；Finally, the good magnetically soft alloy steel bands bar of fragmentation passes through two-sided glue sticking
Together, laminated construction as shown in Figure 7 is formed；Wherein, described in the laminated construction of the magnetically soft alloy strip material structure 1
The number of plies of the magnetically soft alloy steel band bed of material 11 is more than 1 and is less than 100.
In step 2), the S2 steps in Figure 10 are referred to, prepare ferrite magnetic material layer or magnetic class glue material layer 2.
As an example, the material of the ferrite magnetic material layer 21 is Mn-Zn, Ni-Zn or Cu-Mg-Zn etc., the iron
Saturation flux density Bs=0.2T~0.4T of oxysome magnetic material layer 21, the width of the ferrite magnetic material layer 21 can be with
For 50mm~200mm, thickness can be 50 μm~300 μm.
Comprise the following steps as an example, preparing magnetic class glue material layer 22：
Soft magnetism powder 2-1) is provided；The soft magnetism powder can be Fe-Si alloyed powders, Fe-Si-Al alloyed powders, Fe-Ni conjunctions
Bronze, Fe-Ni-Mo alloyed powders, Fe-Si-B alloyed powders or Fe-Si-B-Cu-Nb alloyed powders etc., the saturation magnetic of the soft magnetism powder
Flux density Bs=0.8T~1.5T, the grain graininess of the soft magnetism powder is 100~800 mesh；
Glue material 2-2) is provided；The glue material can be epoxy resin, acrylic resin, butyl rubber or isopropyl rubber etc.；
Stirred after 2-3) the soft magnetism powder is mixed in proportion with the glue material, coated on PET polyester films
Carry out drawout；
2-4) by step 2-3) obtained structure delivers on hot press and carries out hot pressing and be thinned to can obtain the magnetic class glue
Material layer.
As an example, the width of the magnetic class glue material layer 22 is 50mm~200mm, thickness is 50 μm~200 μm.
In step 3), the S3 steps in Figure 10 are referred to, the magnetically soft alloy strip material structure 1 are adhered on described
The surface of ferrite magnetic material layer or magnetic class glue material layer 2.
As an example, the ferrite magnetic material layer or magnetic class glue material layer 2 adhered on by the adhesive layer it is described
The surface of magnetically soft alloy strip material structure 1, the adhesive layer can be but be not limited only to double faced adhesive tape.
As an example, also comprise the following steps after step 3)：
4) diaphragm 3 is provided, (adhesive layer described herein is described in embodiment one by adhesive layer by the diaphragm 3
The first adhesive layer 6) adhere on the magnetically soft alloy strip material structure 1 away from the ferrite magnetic material layer or magnetic class
The surface of glue material layer 2；The diaphragm 3 is black protective film, and its material can be graphite heat-conducting fin.
5) PET mould release membrances are formed (i.e. in fact on surface of the diaphragm 3 away from the magnetically soft alloy strip material structure 1
Apply the first PET mould release membrances 4 described in example one), and in the ferrite magnetic material layer or magnetic class glue material layer 2 away from described
The surface of magnetically soft alloy strip material structure 1 forms the PET mould release membrances (the 2nd PET mould release membrances i.e. described in embodiment one
5)；Specifically, the PET mould release membrances adhere on the iron by adhesive layer (the second adhesive layer 7 i.e. described in embodiment one)
The surface of oxysome magnetic material layer or magnetic class glue material layer 2 away from the magnetically soft alloy strip material structure 1.
As an example, also include after step 5)：
6) the step of structure for obtaining step 5) is die cut, to obtain the finished product of required specification.
A kind of preferred side as electromagnetic shielding of the present utility model with the preparation method of composite laminate magnetic material structures
Case, the structure that step 5) is obtained also include after being die cut
7) the step of finished product of obtained required specification being subjected to preservative treatment.
As an example, in step 7), using the method for immersion inorganic coating agent, soak the method for resin shellac varnish, soak nothing
The laminating PET film of method or surface of machine covering and resin shellac varnish simultaneously carries out the required specification chi that the method for pack edge reason will obtain
Very little finished product carries out preservative treatment.
As an example, the finished product of obtained required specification is carried out at anti-corrosion using the method for immersion inorganic coating agent
The specific method of reason is：The finished product edge of obtained required size is soaked into inorganic coating agent (phosphate or chromate) solution
In, chemical reaction is brought it about, it is then toasted into 0.5~5h at 80~200 DEG C, can be on the finished product peripheral fault surface
One layer of protection film layer for being insoluble in water of place's generation.The diaphragm is firmly combined with matrix, has good adsorptivity, corrosion resistance.
There can be preferable anti salt spray corrosion effect to magnetic material peripheral fault.
As an example, the finished product of obtained required specification is subjected to preservative treatment using the method for immersion resin shellac varnish
Specific method be：The finished product edge of obtained required size is soaked into resin shellac varnish solution (epoxy resin, polyester resin, third
Olefin(e) acid resin, alkyd resin, varnish etc.) in, make to adhere to one layer of resin glue enamelled coating at finished product peripheral fault surface, then again will
It toasts 0.5~5h at 80~200 DEG C solidifies shellac varnish layer, and it is anti-that the curable lacquer layer can prevent that inner magnet material from occurring oxide etch
Should, anti salt spray corrosion effect can be played.
As an example, using the method for immersion inorganic coating agent and resin shellac varnish by the finished product of obtained required specification
Carry out preservative treatment specific method be：First by the finished product edge of obtained required size soak inorganic coating agent (phosphate or
Chromate) solution, reaction is brought it about, and 0.5h~5h is toasted at 80~200 DEG C, it will form one layer at its peripheral fault surface
Protection against oxidation film layer, resin shellac varnish solution (epoxy resin, polyester resin, acrylic resin, alkyd tree are then soaked again
Fat, varnish etc.), 0.5h~5h is toasted at 80~200 DEG C, ultimately forms one layer of very thin composite protection layer, the complex protection
Layer is due to more good with two layers of protection, its anticorrosion ability.
As an example, using the laminating PET film in surface and the method for pack edge reason is carried out by obtained required specification
Finished product carry out preservative treatment specific method be：First by each laminating one layer of PET of the finished product upper and lower surface of obtained required size from
Type film, it is close that roll-in fitting is carried out by disk roller, then by die-cutting process by surface PET mould release membrances from from finished product outward flange one
Set a distance (1~5mm) place is cut off, due to above and below edge PET mould release membrances be bonded by layers of two-sided it is close, and by finished product bag
Intermediate layer is wrapped in, therefore can prevent the extreme environments such as perishable atmosphere or the moisture of outside from having influence on finished surface and edge and giving birth to
Rust, so as to play anti salt spray corrosion effect, it is ensured that the stability of its electromagnetic performance.
In summary, the utility model provides a kind of electromagnetic shielding and uses composite laminate magnetic material structures, the electromagnetic screen
Cover is included with composite laminate magnetic material structures：Magnetically soft alloy strip material structure, including at least one layer of magnetically soft alloy steel band
The bed of material；Ferrite magnetic material layer or magnetic class glue material layer, adhere on the surface of the magnetically soft alloy strip material structure.This reality
It is to include the magnetically soft alloy steel band bed of material and ferrite magnetic with the new electromagnetic shielding with composite laminate magnetic material structures
The composite lamainated structure of property material layer or magnetic class glue material layer, is used as in the electromagnetic shielding with composite laminate magnetic material structures
During wireless charging antifreeze plate, both ensure that magnetically soft alloy strip material in lower frequency (<High magnetic permeability 500kHz) etc. is soft
Magnetic property, taken into account again ferrite, magnetic class glue material upper frequency (<Low loss characteristic when 20MHz), while it is also contemplated that
The antifreeze plate at the coil back side prevents in high current wireless charging supersaturated abnormal, can be integrated using this composite lamainated structure
The performance advantage of two kinds of materials, there is good magnetism isolating effect, reduce heating energy consumption problem, the applying frequency of magnetic material is opened up significantly
Wide (100kHz~20MHz), can meet the wireless charging electromagnetic shielding demand such as Qi and A4WP simultaneously, to improving its charge efficiency
Have great importance with charging distance.
Above-described embodiment only illustrative principle of the present utility model and its effect are new not for this practicality is limited
Type.Any person skilled in the art can all be carried out without prejudice under spirit and scope of the present utility model to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the essence disclosed in the utility model
God and all equivalent modifications completed under technological thought or change, should be covered by claim of the present utility model.
Claims (6)
1. one kind electromagnetic shielding uses composite laminate magnetic material structures, it is characterised in that the electromagnetic shielding uses composite laminate magnetic
Property material structure includes：
Magnetically soft alloy strip material structure, including at least one layer of magnetically soft alloy steel band bed of material；
Ferrite magnetic material layer or magnetic class glue material layer, adhere on the surface of the magnetically soft alloy strip material structure.
2. electromagnetic shielding according to claim 1 uses composite laminate magnetic material structures, it is characterised in that：The electromagnetic screen
Cover also is included with composite laminate magnetic material structures：
Diaphragm, the magnetically soft alloy strip material structure is adhered on away from the ferrite magnetic material layer or the magnetic class
The surface of glue material layer；
First PET mould release membrances, adhere on surface of the diaphragm away from the magnetically soft alloy strip material structure；
2nd PET mould release membrances, adhere on the ferrite magnetic material layer or the magnetic class glue material layer closes away from the soft magnetism
The surface of golden strip material structure.
3. electromagnetic shielding according to claim 2 uses composite laminate magnetic material structures, it is characterised in that：The soft magnetism closes
Golden strip material structure includes relative first surface and second surface, the first surface of the magnetically soft alloy strip material structure
And second surface is equipped with the first adhesive layer；The ferrite magnetic material layer or the magnetic class glue material layer are via described first
Adhesive layer adheres on the first surface of the magnetically soft alloy strip material structure；The diaphragm pastes via first adhesive layer
It is placed in the second surface of the magnetically soft alloy strip material structure；The 2nd PET mould release membrances adhere on via the second adhesive layer
The surface of the ferrite magnetic material layer or the magnetic class glue material layer away from the magnetically soft alloy strip material structure.
4. electromagnetic shielding according to claim 1 uses composite laminate magnetic material structures, it is characterised in that：The soft magnetism closes
Golden strip material structure is to include the magnetically soft alloy steel band bed of material described in multilayer and replace with the magnetically soft alloy steel band bed of material
The laminated construction of the 3rd stacked adhesive layer.
5. electromagnetic shielding according to claim 1 uses composite laminate magnetic material structures, it is characterised in that：The soft magnetism closes
Golden strip material structure is banded structure, and ferrite magnetic material layer or magnetic class the glue material layer is banded structure.
6. electromagnetic shielding uses composite laminate magnetic material structures according to claim 1 or 5, it is characterised in that：The electricity
Magnetic screen composite laminate magnetic material structures also include anticorrosive coat, and the exposed soft magnetism is at least completely covered in the anticorrosive coat
The side and end face of alloyed steel strip material layer, and the exposed ferrite magnetic material layer or the magnetic is at least completely covered
The side and end face of class glue material layer.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597792A (en) * | 2018-04-27 | 2018-09-28 | 苏州威斯东山电子技术有限公司 | A kind of magnetic material applied to high-power fast wireless charging transmitting terminal |
| CN110581014A (en) * | 2019-08-16 | 2019-12-17 | 蓝沛光线（上海）电子科技有限公司 | Anti-saturation magnetic-isolating sheet and preparation method thereof |
| CN110744887A (en) * | 2019-10-15 | 2020-02-04 | 哈尔滨工程大学 | Magnesium-lithium-based composite material with high electromagnetic shielding performance and preparation method thereof |
| CN112219248A (en) * | 2018-05-29 | 2021-01-12 | Lg 伊诺特有限公司 | Magnetic sheet and wireless power module including the same |
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2017
- 2017-03-08 CN CN201720223318.5U patent/CN206640942U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597792A (en) * | 2018-04-27 | 2018-09-28 | 苏州威斯东山电子技术有限公司 | A kind of magnetic material applied to high-power fast wireless charging transmitting terminal |
| CN112219248A (en) * | 2018-05-29 | 2021-01-12 | Lg 伊诺特有限公司 | Magnetic sheet and wireless power module including the same |
| CN110581014A (en) * | 2019-08-16 | 2019-12-17 | 蓝沛光线（上海）电子科技有限公司 | Anti-saturation magnetic-isolating sheet and preparation method thereof |
| CN110744887A (en) * | 2019-10-15 | 2020-02-04 | 哈尔滨工程大学 | Magnesium-lithium-based composite material with high electromagnetic shielding performance and preparation method thereof |
| CN110744887B (en) * | 2019-10-15 | 2021-10-01 | 哈尔滨工程大学 | Magnesium-lithium-based composite material with high electromagnetic shielding performance and preparation method thereof |
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