CN209516750U - Shielding piece with air gap - Google Patents
Shielding piece with air gap Download PDFInfo
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- CN209516750U CN209516750U CN201821824151.9U CN201821824151U CN209516750U CN 209516750 U CN209516750 U CN 209516750U CN 201821824151 U CN201821824151 U CN 201821824151U CN 209516750 U CN209516750 U CN 209516750U
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- piece
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- shielding
- shielding piece
- gap structure
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Abstract
The utility model discloses the shielding piece provided by the utility model with air gap, including magnetic piece, the magnetic piece is equipped with gap structure, and the gap structure is radially.Make magnetic conductivity gradual change by gap structure radially, improves the performance of shielding piece, can be realized simultaneously good charge efficiency and thinner thickness.
Description
Technical field
The utility model relates to wireless charging technical fields, more particularly to the shielding piece with air gap.
Background technique
For consumer electronics product, wireless charging has the advantages such as easy to operate, versatile therefore can
The electronic product of wireless charging is carried out very by the welcome of consumer.The cardinal principle of wireless charging has two classes, first is that magnetic inductive,
Second is that magnetic resonance type, wherein magnetic inductive is the major way of current wireless charging.The principle of magnetic inductive wireless charging is similar
Transformer, i.e., containing there are two coil, electric energy is gone out with the electromagnetic field emissions of 110kHz~400kHz frequency, is received by transmitting end-coil
End-coil receives the electromagnetic field of transmitting terminal by way of electromagnetic induction, is then secondary electricity at direct current by convert alternating current
Pond charging.
Receiving end-coil nearby usually has the metal parts such as battery, can be in gold when carrying out wireless charging by electromagnetic induction
Belong to and forms vortex on component.In order to shield these interference, it usually needs stick a piece of shielding piece at the back side for receiving end-coil.
Authorization Notice No. is that the Chinese utility model patent of CN104011814B discloses a kind of magnetic field shielding piece, the magnetic field
It shields piece and some tens of pm is melted into three millimeters of shred, to reduce eddy-current loss, to realize higher by amorphous band fragment
Wireless charging efficiency.Authorization Notice No. is that the Chinese utility model patent of CN104900383B discloses a kind of wireless charging conductance
The preparation method of magnetic sheet realizes the insulation between amorphous, nanocrystalline chips unit by gum dipping process, to reduce eddy-current loss.
Authorization Notice No. be the Chinese utility model patent of CN103547135B disclose it is a kind of ceramic laminated with bendability and
Nickel zinc, manganese-zinc ferrite are carried out fragmentation processing, increase product flexibility by its manufacturing method.The shielding piece of the above structure, gas
Gap (gap between two neighboring amorphous/nanocrystalline fragmentation cell) is planar uniformly distributed.According to demagnetization field theory, magnetic
Conductance is planar also inevitable essentially identical.However, magnetic field is in shielding piece since current Wireless charging coil is helical form
In plane and uneven distribution, but radial distribution is presented, be embodied in it is stronger in hub of a spool position magnetic field, in coil
Peripheral magnetic field is weaker.It is uniformity structure by the air-gap design of on piece is shielded, the shielding of soft magnetic materials can not be given full play of
Effect, therefore, in order to guarantee to shield the shield effectiveness for shielding piece of piece, the thickness of existing shielding piece is bigger than normal.
Utility model content
It is and existing the technical problem to be solved by the utility model is to provide a kind of novel shielding piece with air gap
Shielding piece compare, this have air gap shielding piece performance it is more preferable.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows: the shielding piece with air gap, including
Magnetic piece, the magnetic piece are equipped with gap structure, and the gap structure is radially.
Further, the total length of the gap structure is 2-5000 times of the outer perimeter of the magnetic piece.
Further, the quantity of the magnetic piece is multiple, and multiple magnetic sheets stack, two adjacent institutes
It states between magnetic piece through insulation glue connection.
Further, the insulating cement is filled in the gap structure.
Further, the magnetic piece is divided into multiple sectorial blocks by the gap structure.
Further, the profile of sectorial block described in any two is identical, area equation.
The utility model has the beneficial effects that: the magnetic conductivity gradual change of shielding piece makes the magnetic conductivity and charge coil that shield piece
Magnetic field match: the strong region in magnetic field corresponds to the low shielding panel region of magnetic conductivity, thus improve shielding this region soft magnetism of piece
The anti-saturation ability of material；The weak region in magnetic field corresponds to the high shielding panel region of magnetic conductivity, shields this region soft magnetism of piece to allow
Material has good shield effectiveness, and therefore, this has the performance of the shielding piece of air gap more preferable compared with existing shielding piece.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the magnetic piece in the shielding piece with air gap of the utility model embodiment one；
Fig. 2 is the structural schematic diagram of the shielding piece with air gap of the utility model embodiment one and embodiment two；
Fig. 3 is the structural schematic diagram of shielding piece in the prior art；
Fig. 4 is the structural schematic diagram of another shielding piece in the prior art.
Label declaration:
1, magnetic piece；2, gap structure；3, insulating cement.
Specific embodiment
For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
The design of the utility model most critical is: the air gap by the way that radial structure is arranged, to realize shielding piece flat
Magnetic conductivity gradual change is in face with the size in matched coil magnetic field, to improve the wireless charging performance using its electronic product.
Fig. 1 to Fig. 4 is please referred to, the shielding piece with air gap, including magnetic piece 1, the magnetic piece 1 are equipped with gap structure
2, the gap structure 2 is radially.
The structural principle of the utility model is summarized as follows: the coil magnetic field middle section magnetic line of force is intensive, and magnetic field strength is big, and
The coil magnetic field peripheral region magnetic line of force is sparse, and magnetic field strength is small；The soft magnetic materials degree of crushing for shielding piece middle section is high, this area
The pathway disruption that the magnetic piece 1 in domain forms inductive loop is serious, is conducive to improve charge efficiency；Shield the soft magnetism material of piece peripheral region
Expect that degree of crushing is relatively slight, 1 integrity degree of magnetic piece in this region is higher, conducive to the shield effectiveness for guaranteeing shielding piece.
As can be seen from the above description, the utility model has the beneficial effects that: the magnetic conductivity gradual change of shielding piece makes to shield piece
Magnetic conductivity matches with the magnetic field of charge coil: the low shielding panel region of the corresponding magnetic conductivity in the strong region in magnetic field, to improve
Shield the anti-saturation ability of this region soft magnetic materials of piece；The weak region in magnetic field corresponds to the high shielding panel region of magnetic conductivity, to allow
Shielding this region soft magnetic materials of piece has good shield effectiveness, and therefore, this has the performance of the shielding piece of air gap compared with existing
Shielding piece it is more preferable.
Further, the total length of the gap structure 2 is 2-5000 times of the outer perimeter of the magnetic piece 1.
Further, the quantity of the magnetic piece 1 is multiple, and multiple magnetic pieces 1 are stacked together, adjacent two
It is connected between the magnetic piece 1 by insulating cement 3.
Further, the insulating cement 3 is filled in the gap structure 2.
Seen from the above description, filling insulating cement is conducive to guarantee the insulation effect between two neighboring broken magnetic sheet in gap structure
Fruit is further ensured that the shield effectiveness of shielding piece.
Further, the magnetic piece 1 is divided into multiple sectorial blocks by the gap structure 2.
Further, the profile of sectorial block described in any two is identical, area equation.
Seen from the above description, above structure can not only allow shielding piece processing be easier, it is also possible to allow shielding piece magnetic
The gradual change amount of conductance is controllable, so that the performance of different shielding pieces be allowed to reach unanimity, is convenient for large-scale serial production.
Embodiment one
Referring to Fig.1 and 2, the embodiments of the present invention one are as follows: the shielding piece with air gap, including magnetic piece 1, institute
Magnetic piece 1 is stated equipped with gap structure 2, the gap structure 2 is radially.The overall length of the corresponding gap structure 2 of unit area
The magnetic field distribution of degree and charge coil is adapted, the strong region in magnetic field, the total length of the corresponding gap structure 2 in the region
It is long；The total length in the weak region in magnetic field, the corresponding gap structure 2 in the region is short.According to demagnetization field theory, gap structure 2 it is total
The long region of length, magnetic conductivity are low；The short region of the total length of gap structure 2, magnetic conductivity are high.
In the present embodiment, gap structure 2 includes multiple notch, and the notch is of a straight line type, one end of multiple notch
Endpoint be intersected in the central point of the magnetic piece 1.Preferably, multiple notch are uniformly distributed around the central point of the magnetic piece 1
Setting, i.e., along the symmetrical centre point of magnetic piece 1, according to certain angle bisecting line by magnetic piece 1 be cut into it is multiple fan-shaped or
The magnetic piece 1 is divided into multiple sectorial blocks by similar shape, in other words, the gap structure 2, preferably in, any two
The profile of a sectorial block is identical, area equation.
The total length of gap structure 2 is 2-5000 times of the outer perimeter of the magnetic piece 1, optionally, gap structure 2 it is total
Length is 5-50 times of the outer perimeter of the magnetic piece 1, and in the present embodiment, the total length of gap structure 2 is the magnetic piece 1
23 times of outer perimeter.
Optionally, the quantity of the magnetic piece 1 is multiple, and multiple magnetic pieces 1 are stacked together, two adjacent institutes
It states and is connected between magnetic piece 1 by insulating cement 3.Further, it is filled with the insulating cement 3 in the gap structure 2, in reality
In operating process, producers squeeze shielding piece semi-finished product using production equipment and can squeeze the insulating cement 3 between magnetic piece 1
In air inlet gap structure 2.The colloid of resin film is formed after the optional condensation of the insulating cement 3.
It is to be appreciated that both can choose first when shielding piece is multi-layered magnetic chip architecture singly in magnetic piece 1
Upper cutting gap structure 2,1 laminated stickiness of the magnetic piece for then completing multiple cuttings together, first will also can choose
Multiple 1 laminated stickiness of magnetic piece for not cutting gap structure 2 together after, then integral cutting gap structure 2.
The material of magnetic piece 1 is at least one of amorphous nano peritectic alloy, manganese-zinc ferrite and nickel-zinc ferrite.
Embodiment two
The embodiments of the present invention two are as follows: there is the manufacturing method of the shielding piece of air gap, be by alloying component
Fe73.5Cu1Nb3Si15.5B7 (at.%), 60mm wide, 20 μ m-thicks nanocrystalline strip be wound into internal diameter be 100mm, outer diameter
The cyclic annular iron core of 120mm, is put into Equipment for Heating Processing (such as oven) and under argon atmosphere, is heat-treated under the conditions of 550 DEG C
1h。
The nanocrystalline iron core being heat-treated is subjected to coating processing, i.e., pastes one layer 5 μm of insulation in the one side of magnetic piece 1
Then good 1 lamination of magnetic piece of overlay film is obtained semi-finished product at three layers of nanocrystalline structure by glue 3.
Gap structure 2 radially is cut on the semi-finished product using cutter device, and is die cut processing semi-finished product
Profile keeps semi-finished product periphery rounded, and the ratio between total length and outer perimeter of gap structure 2 are 23.The cutter device can be
Die-cutting machine.
Detailed, during cutting gap structure 2, producers are cut on the magnetic piece 1 using cutter device
Multiple notch being of a straight line type and the endpoint of one end of multiple notch is made to be intersected in the central point of the magnetic piece 1 to be formed out
State gap structure 2 radially.
In order to intuitively illustrate the advantage of the shielding piece provided by the utility model with air gap, applicant has made three groups
Sample, and performance test has been carried out to three groups of samples.
Sample one: implement the resulting shielding chip architecture (as shown in Figure 2) of the present embodiment two；
Sample two: according to license notification number be in CN104011814B the fragmentation processing mode recorded to nanocrystalline
It is handled, (as shown in figure 3, wherein label 1 is magnetic piece, label 2 is air gap knot to three layers of nanocrystalline shielding chip architecture obtained
Structure；Label 3 is insulating cement)；
Sample three: according to license notification number be in CN104011814B the fragmentation processing mode recorded to nanocrystalline
It is handled, (as shown in figure 4, wherein label 1 is magnetic piece, label 2 is air gap knot to four layers of nanocrystalline shielding chip architecture obtained
Structure；Label 3 is insulating cement).
Using Qi standard coil A11, be moral N6705B power analysis instrument and IDT P9242 P9221 carry out wireless charging
Electric (10W) efficiency test.Test result is as shown in table 1.
The shielding piece effect test comparison table of 1 different air gap structure of table
| Sample number into spectrum | It shields piece thickness (μm) | Coil inductance (μ H) | Charge efficiency (%) |
| Sample one | 80 | 8.98 | 82.5 |
| Sample two | 80 | 8.80 | 81.3 |
| Sample three | 105 | 8.85 | 82.2 |
As it can be seen from table 1 sample one, compared with sample two, under identical shielding piece thickness, the charge efficiency of sample one is wanted
Than sample two, charge efficiency is high 1.2%；Sample one is compared with sample three, in the case that charge efficiency is essentially identical, sample one
It is thinner；It follows that the shielding piece shield effectiveness with air gap of the utility model is more preferable, thinner, production consumption
Material is less, and in other words, the shielding piece performance with air gap of the utility model is more excellent.
In conclusion the shielding piece provided by the utility model with air gap, makes magnetic by gap structure radially
Conductance gradual change improves the performance of shielding piece, can be realized simultaneously good charge efficiency and thinner thickness.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalents made based on the specification and figures of the utility model are applied directly or indirectly in relevant technology neck
Domain is also included in the patent protection scope of the utility model.
Claims (5)
1. the shielding piece with air gap, including magnetic piece, the magnetic piece is equipped with gap structure, it is characterised in that: the gas
Radially, the magnetic piece is divided into multiple sectorial blocks to gap structure by the gap structure.
2. the shielding piece according to claim 1 with air gap, it is characterised in that: the total length of the gap structure is institute
2-5000 times for stating the outer perimeter of magnetic piece.
3. the shielding piece according to claim 1 with air gap, it is characterised in that: the quantity of the magnetic piece be it is multiple,
Multiple magnetic sheets stack, and pass through insulation glue connection between two adjacent magnetic pieces.
4. the shielding piece according to claim 3 with air gap, it is characterised in that: filled with described in the gap structure
Insulating cement.
5. the shielding piece according to claim 1 with air gap, it is characterised in that: the profile of sectorial block described in any two
Identical, area equation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821824151.9U CN209516750U (en) | 2018-11-06 | 2018-11-06 | Shielding piece with air gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821824151.9U CN209516750U (en) | 2018-11-06 | 2018-11-06 | Shielding piece with air gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209516750U true CN209516750U (en) | 2019-10-18 |
Family
ID=68192141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821824151.9U Active CN209516750U (en) | 2018-11-06 | 2018-11-06 | Shielding piece with air gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209516750U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412279A (en) * | 2018-11-06 | 2019-03-01 | 信维通信（江苏）有限公司 | Shielding piece and its manufacturing method with air gap |
| WO2021169198A1 (en) * | 2020-02-28 | 2021-09-02 | 华为技术有限公司 | Shielding film, coil assembly and wireless charging device |
-
2018
- 2018-11-06 CN CN201821824151.9U patent/CN209516750U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109412279A (en) * | 2018-11-06 | 2019-03-01 | 信维通信（江苏）有限公司 | Shielding piece and its manufacturing method with air gap |
| WO2021169198A1 (en) * | 2020-02-28 | 2021-09-02 | 华为技术有限公司 | Shielding film, coil assembly and wireless charging device |
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