CN116417226A - Magnetism-isolating composite material for wireless charging, device with wireless charging function and application - Google Patents
Magnetism-isolating composite material for wireless charging, device with wireless charging function and application Download PDFInfo
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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
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
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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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
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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
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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
- H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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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
- H01F2027/348—Preventing eddy currents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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Abstract
The invention provides a magnetism isolating composite material for wireless charging, a device with a wireless charging function and application thereof. The wireless charging magnetism isolating composite material comprises a ferrite magnetism isolating material layer and a nanocrystalline magnetism isolating material layer which are arranged in a stacked mode, wherein the nanocrystalline magnetism isolating material layer comprises at least one multilayer nanocrystalline magnetism isolating strip, and the permeability of the multilayer nanocrystalline magnetism isolating strip gradually rises along the direction away from the ferrite magnetism isolating material layer. The magnetic isolation composite material for wireless charging with the structure can greatly reduce eddy current loss in the high-power charging process and reduce heat productivity, so that the magnetic isolation composite material has better electric energy transmission efficiency in the application process.
Description
Technical Field
The invention relates to the field of manufacturing of magnetism isolating materials, in particular to a magnetism isolating composite material for wireless charging, a device with a wireless charging function and application.
Background
The prior document (bulletin No. CN 209087527U) provides a large-size amorphous nanocrystalline magnetic isolation sheet lamination structure for wireless charging, which mainly comprises an amorphous nanocrystalline strip, an adhesive, a release film and an insulating adhesive tape, wherein the amorphous nanocrystalline strip is coated with the adhesive, laminated layer by layer, rolled and coated with the release film to prepare an amorphous nanocrystalline monomer; splicing the amorphous nanocrystalline monomers one by adopting an adhesive to prepare an amorphous nanocrystalline monomer plate; tearing the release film on the lower surface of the amorphous nanocrystalline monomer plate, stacking layer by layer through an adhesive according to a method that splicing gaps of adjacent monomer plates are staggered, and rolling to prepare an amorphous nanocrystalline monomer plate stack; finally, the whole outer surface is coated with the insulating adhesive tape to obtain the finished product. But compared with a low-power application scene, the magnetic field intensity in the wireless charging system is larger under high power, the tiled nanocrystalline strip can generate eddy current loss on the surface of the strip, so that the loss of the existing nanocrystalline strip is serious and the heating problem is generated, and the electric energy transmission efficiency of the wireless charging system is affected.
The prior document (CN 210694778U) provides a nanocrystalline electromagnetic shielding material for high-power wireless charging of an automobile, which is formed by sticking and laminating a plurality of layers of large-size broad-width nanocrystalline soft magnetic isolation sheets in a mutually orthogonal and vertical arrangement and distribution mode through double-sided adhesive tapes, and black PI films are respectively stuck on the front surface of the bottommost layer of large-size broad-width nanocrystalline soft magnetic isolation sheets and the back surface of the topmost layer of large-size broad-width nanocrystalline soft magnetic isolation sheets; each layer of large-size wide-width nanocrystalline soft magnetic isolation sheet is formed by splicing a plurality of strip small-width nanocrystalline soft magnetic isolation tapes in a seamless parallel arrangement mode, and the peripheral edge of each layer of large-size wide-width nanocrystalline soft magnetic isolation sheet is in a vertical bending structure along the outer edge of the coil panel. But compared with a low-power application scene, the magnetic field intensity in the wireless charging system is larger under high power, the surface of the tiled nanocrystalline strip can generate larger eddy current loss, the nanocrystalline strip can be seriously lost and generate heating problems, and the electric energy transmission efficiency of the wireless charging system is further affected.
In view of the foregoing, it is desirable to provide a magnetically isolated composite material that has a high power transfer efficiency for charging at high power.
Disclosure of Invention
The invention mainly aims to provide a magnetism isolating composite material for wireless charging, a device with a wireless charging function and application thereof, and aims to solve the problems that under high power, the magnetic field intensity in the existing wireless charging system is high, the surface of a tiled nanocrystalline magnetism isolating tape generates larger eddy current loss, the nanocrystalline magnetism isolating tape is seriously lost, and the heating problem is generated, so that the electric energy transmission efficiency of the wireless charging system is affected.
In order to achieve the above object, according to one aspect of the present invention, there is provided a magnetic insulation composite material for wireless charging, including ferrite magnetic insulation material layers and nanocrystalline magnetic insulation material layers stacked, wherein the nanocrystalline magnetic insulation material layers include at least one multilayer nanocrystalline magnetic insulation strip, and the magnetic permeability of the multilayer nanocrystalline magnetic insulation strip gradually increases in a direction away from the ferrite magnetic insulation material layers.
Further, the multi-layer nanocrystalline magnetic separation strip is formed by bonding 1-120 layers of single-layer nanocrystalline magnetic separation strips, and the permeability of each single-layer nanocrystalline magnetic separation strip is 200-20000H/m.
Further, the multi-layer nanocrystalline magnetic separation strip is formed by bonding 120 layers of single-layer nanocrystalline magnetic separation strips, the 1 st to 30 th layers are all first single-layer nanocrystalline magnetic separation strips, the magnetic conductivity is 200-2000H/m, the 31 st to 60 th layers are all second single-layer nanocrystalline magnetic separation strips, the magnetic conductivity is 2000-5000H/m, the 61 st to 90 th layers are all third single-layer nanocrystalline magnetic separation strips, the magnetic conductivity is 5000-10000H/m, the 91 st to 120 th layers are fourth single-layer nanocrystalline magnetic separation strips, and the magnetic conductivity is 10000-20000H/m.
Further, the multi-layer nanocrystalline magnetic separation strip is formed by bonding 120 layers of single-layer nanocrystalline magnetic separation strips, the 1 st to 30 th layers are all first single-layer nanocrystalline magnetic separation strips, the magnetic permeability is 700-1000H/m, the 31 st to 60 th layers are all second single-layer nanocrystalline magnetic separation strips, the magnetic permeability is 3000-4500H/m, the 61 st to 90 th layers are all third single-layer nanocrystalline magnetic separation strips, the magnetic permeability is 7000-9000H/m, the 91 st to 120 th layers are fourth single-layer nanocrystalline magnetic separation strips, and the magnetic permeability is 11000-15000H/m.
Further, when at least two multi-layered nanocrystalline magnetic separation strips are included in the nanocrystalline magnetic separation material layer, each multi-layered nanocrystalline magnetic separation strip is disposed in parallel.
Further, the ferrite magnetism isolating material layer is formed by ferrite magnetic sheets, and the magnetic permeability of the ferrite is 2000-4000H/m, preferably 3000-3500H/m.
Further, the thickness of the ferrite magnetism isolating material layer is 1-3mm, and the average thickness of the single-layer nanocrystalline magnetic isolating tape is 0.018-0.022 mm.
The utility model provides a still provide a device that contains wireless function of charging, including electromagnetic shield subassembly, electromagnetic shield subassembly includes above-mentioned wireless magnetism isolating composite material that charges.
Further, the device with the wireless charging function is one or more selected from the group consisting of an electric automobile, a mobile phone, a tablet computer, a digital camera or a wearable mobile device.
Still another aspect of the present application provides an application of the magnetism isolating composite material for wireless charging provided in the present application in the technical field of wireless charging.
Compared with the traditional multilayer nanocrystalline composite magnetic sheet for wireless charging, the magnetic isolation material for wireless charging provided by the invention has the advantages that the magnetic isolation material layer of ferrite and the nanocrystalline magnetic isolation material layer are arranged, and the inside of the nanocrystalline magnetic isolation material layer has different magnetic characteristics. In the nanocrystalline magnetism isolating material layer, the permeability of the multilayer nanocrystalline magnetism isolating strip is from low to high, and a composite structure with gradient magnetism conducting characteristics can be formed. The ferrite magnetic sheet is closest to the wireless charging system, the efficiency of the wireless charging system is guaranteed due to the low loss characteristic, and the part, close to the ferrite magnetic isolation material layer, of the upper nanocrystalline magnetic isolation material layer has low magnetic permeability, so that the loss is low, and the part with high magnetic permeability has excellent magnetic shielding effect, so that the magnetic field radiation of the wireless charging system is restrained. On the basis, the magnetic isolation composite material for wireless charging with the structure can greatly reduce eddy current loss in the high-power charging process and reduce heat productivity, so that the magnetic isolation composite material has better electric energy transmission efficiency in the application process.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic structural diagram of the magnetic insulating composite material for wireless charging prepared in examples 1 to 4.
Wherein the above figures include the following reference numerals:
10. a ferrite magnetic isolation material layer; 20. a nanocrystalline magnetically isolated material layer; 21. a first nanocrystalline magnetically isolated strip; 22. a second nanocrystalline magnetically isolated strip; 23. a third nanocrystalline magnetically isolated strip; 24. fourth nanocrystalline magnetically isolated strip.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present invention will be described in detail with reference to examples.
As described in the background art, under high power, the magnetic field intensity in the existing wireless charging system is high, and the surface of the tiled nanocrystalline separation tape can generate larger eddy current loss, so that the nanocrystalline separation tape is seriously lost and generates heat, thereby influencing the power transmission efficiency of the wireless charging system. In order to solve the technical problem, the application provides a wireless magnetism isolating composite material for charging, which comprises a ferrite magnetism isolating material layer and a nanocrystalline magnetism isolating material layer which are arranged in a stacked manner, wherein the nanocrystalline magnetism isolating material layer comprises at least one multilayer nanocrystalline magnetism isolating strip, and the permeability of the multilayer nanocrystalline magnetism isolating strip gradually increases along the direction away from the ferrite magnetism isolating material layer.
Compared with the traditional multilayer nanocrystalline composite magnetic sheet for wireless charging, the magnetic isolation composite material for wireless charging provided by the invention has different magnetic properties between ferrite and nanocrystalline in nanocrystalline magnetic isolation strip. The magnetic permeability of the multilayer nanocrystalline magnetism isolating strip is from low to high, and a composite structure with gradient magnetic permeability characteristics can be formed. The ferrite magnetic sheet is closest to the wireless charging system, the efficiency of the wireless charging system is guaranteed due to the low loss characteristic, and the part, close to the ferrite magnetic isolation material layer, of the upper nanocrystalline magnetic isolation material layer has low magnetic permeability, so that the loss is low, and the part with high magnetic permeability has excellent magnetic shielding effect, so that the magnetic field radiation of the wireless charging system is restrained. On the basis, the magnetic isolation composite material for wireless charging with the structure can greatly reduce eddy current loss in the high-power charging process and reduce heat productivity, so that the magnetic isolation composite material has better electric energy transmission efficiency in the application process.
In a preferred embodiment, the multi-layer nanocrystalline magnetic separation tape is formed by bonding 1 to 120 layers of single-layer nanocrystalline magnetic separation tapes, and the permeability of each single-layer nanocrystalline magnetic separation tape is 200 to 20000H/m. Compared with other ranges, the magnetic permeability of the single-layer nanocrystalline magnetic isolation tape is limited in the range, so that the magnetic flux of the magnetic isolation material for wireless charging is improved, the magnetic force lines emitted outwards in the wireless charging process of the device with the wireless charging function are reduced, the influence on surrounding metal objects is further reduced, the magnetic shielding performance of the magnetic isolation material for wireless charging is improved, and eddy currents and signal interference are prevented; meanwhile, eddy current loss is further reduced, heat generated in the wireless charging process is reduced, and the electric energy transmission efficiency of the wireless charging system is further improved.
In a preferred embodiment, the multi-layer nanocrystalline magnetic separation tape is formed by bonding 120 layers of single-layer nanocrystalline magnetic separation tapes, wherein the 1 st layer to the 30 th layer are all first single-layer nanocrystalline magnetic separation tapes, the magnetic permeability is 200 to 2000H/m, the 31 st layer to the 60 th layer are all second single-layer nanocrystalline magnetic separation tapes, the magnetic permeability is 2000 to 5000H/m, the 61 st layer to the 90 th layer are all third single-layer nanocrystalline magnetic separation tapes, the magnetic permeability is 5000 to 10000H/m, the 91 st layer to the 120 th layer are fourth single-layer nanocrystalline magnetic separation tapes, and the magnetic permeability is 10000 to 20000H/m. The number of layers of the multi-layer nanocrystalline magnetism isolating strip and the magnetic permeability of the single-layer nanocrystalline shielding material adopted by each layer are limited in the range, so that the magnetic permeability of the nanocrystalline magnetism isolating material layer can be increased stepwise, thereby being beneficial to further reducing eddy current loss and heat generation in the high-power charging process and improving the electric energy transmission efficiency of the wireless charging system.
In order to further improve the electric energy transmission efficiency of the wireless charging system, more preferably, the multi-layer nanocrystalline magnetic separation strip is formed by bonding 120 layers of single-layer nanocrystalline magnetic separation strips, the 1 st to 30 th layers are all first single-layer nanocrystalline magnetic separation strips, the magnetic permeability is 700-1000H/m, the 31 st to 60 th layers are all second single-layer nanocrystalline magnetic separation strips, the magnetic permeability is 3000-4500H/m, the 61 st to 90 th layers are all third single-layer nanocrystalline magnetic separation strips, the magnetic permeability is 7000-9000H/m, the 91 st to 120 th layers are fourth single-layer nanocrystalline magnetic separation strips, and the magnetic permeability is 11000-15000H/m.
In a preferred embodiment, when at least two multi-layered nanocrystalline magnetically isolated tapes are included in the nanocrystalline magnetically isolated material layer, each multi-layered nanocrystalline magnetically isolated tape is disposed in parallel.
In order to further improve the wireless charging efficiency of the magnetic shielding composite material for wireless charging, the ferrite magnetic shielding material layer is preferably formed of a ferrite sheet, and the magnetic permeability of ferrite is preferably 2000 to 4000H/m, more preferably 3000 to 3500H/m.
In order to reduce the weight of the magnetism isolating composite material for wireless charging, the thickness of the ferrite magnetism isolating material layer is preferably 1-3mm, and the average thickness of the single-layer nanocrystalline magnetic isolating tape is preferably 0.018-0.022 mm.
In another aspect, the present application further provides a method for preparing a preferred magnetic isolation composite material for wireless charging, including:
(1) Preparation of nanocrystalline magnetic isolation sheet for wireless charging: pasting insulating tapes on two sides of a single-piece nanocrystalline magnetic tape material, and then performing splitting treatment to obtain a sample with required magnetic permeability; and bonding the split nanocrystals with different magnetic permeability according to the order of the magnetic permeability to obtain a multi-layer nanocrystal magnetic isolation strip, and then cutting the multi-layer nanocrystal magnetic isolation strip into the required size.
(2) Preparation of ferrite magnetic sheet for wireless charging: the ferrite tile was cut into samples of appropriate dimensions.
(3) Firstly, spreading a layer of ferrite magnetic sheet on the receiving end magnetism isolating substrate to form a ferrite magnetism isolating material layer; then, a plurality of layers of nanocrystalline magnetism isolating strips are paved and stuck in order from small magnetic permeability to large magnetic permeability, and a nanocrystalline magnetism isolating material layer is formed. Preferably, the ferrite magnetic sheet has a size of (50-100 mm) × (50-100 mm) × (1-3 mm).
The second aspect of the application also provides a device with a wireless charging function, which comprises an electromagnetic shielding assembly, wherein the electromagnetic shielding assembly comprises the magnetism isolating composite material for wireless charging.
The device with the wireless charging function has lower eddy current loss, smaller heating value and higher electric energy transmission efficiency in the high-power wireless charging process. Preferably, the device with wireless charging function includes, but is not limited to, one or more of the group consisting of an electric car, a cell phone, a tablet computer, a digital camera, or a wearable mobile device.
The third aspect of the application also provides application of the magnetism isolating composite material for wireless charging in the technical field of wireless charging.
The magnetism isolating composite material for wireless charging has lower eddy current loss, smaller heating value and higher electric energy transmission efficiency in the high-power wireless charging process, so that the magnetism isolating composite material can be applied to the technical field of wireless charging, the high-power wireless charging efficiency can be greatly improved, the high economic efficiency is achieved, and the development of the field of wireless charging is promoted.
The present application is described in further detail below in conjunction with specific embodiments, which should not be construed as limiting the scope of the claims.
Example 1
The magnetic isolation composite material for wireless charging is shown in fig. 1, and comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20 which are stacked. Wherein the ferrite magnetic isolation material layer 10 is formed by PC95, and the thickness is 3mm; the nanocrystalline magnetism isolating material layer 20 comprises a first nanocrystalline magnetism isolating strip 21, a second nanocrystalline magnetism isolating strip 22, a third nanocrystalline magnetism isolating strip 23 and a fourth nanocrystalline magnetism isolating strip 24 which are sequentially stacked, wherein the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22, the third nanocrystalline magnetism isolating strip 23 and the fourth nanocrystalline magnetism isolating strip 24 are formed by bonding 1-30 layers of single-layer nanocrystalline magnetism isolating strips through a bonding agent, the average thickness of each single-layer nanocrystalline magnetism isolating strip is 0.018-0.022 mm, the average thickness of each nanocrystalline magnetism isolating strip is 0.75mm, and the first nanocrystalline magnetism isolating strip 21 is arranged close to the ferrite magnetism isolating material layer 10. The magnetic permeability of each nanocrystalline magnetic isolation strip in the ferrite magnetic isolation material layer 10 and the nanocrystalline magnetic isolation material layer 20 is shown in table 1.
TABLE 1
| Material | Permeability mu', H/m |
| Ferrite magnetism isolating material layer | 3300 |
| First nanocrystalline spacer tape | 700 |
| Second nanocrystalline spacer tape | 3000 |
| Third nanocrystalline spacer tape | 8000 |
| Fourth nanocrystalline spacer tape | 11000 |
Example 2
The magnetic isolation composite material for wireless charging is shown in fig. 1, and comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20. The ferrite magnetic isolation material layer 10 is formed by a PC95, the thickness is 1mm, the nanocrystalline magnetic isolation material layer 20 comprises a first nanocrystalline magnetic isolation strip 21, a second nanocrystalline magnetic isolation strip 22, a third nanocrystalline magnetic isolation strip 23 and a fourth nanocrystalline magnetic isolation strip 24 which are sequentially stacked, the first nanocrystalline magnetic isolation strip 21, the second nanocrystalline magnetic isolation strip 22, the third nanocrystalline magnetic isolation strip 23 and the fourth nanocrystalline magnetic isolation strip 24 are formed by bonding 1-30 layers of single-layer nanocrystalline magnetic isolation strips through a bonding agent, the average thickness of each single-layer nanocrystalline magnetic isolation strip is 0.018-0.022 mm, the average thickness of each nanocrystalline magnetic isolation strip is 0.75mm, and the first nanocrystalline magnetic isolation strip 21 is arranged close to the ferrite magnetic isolation material layer 10. The magnetic permeability of each nanocrystalline magnetic separation strip in the ferrite magnetic separation material layer 10 and the nanocrystalline magnetic separation material layer 20 is shown in table 2.
TABLE 2
| Material | Permeability mu', H/m |
| Ferrite magnetism isolating material layer | 3300 |
| First nanocrystalline spacer tape | 700 |
| Second nanocrystalline spacer tape | 3000 |
| Third nanocrystalline spacer tape | 8000 |
| Fourth nanocrystalline spacer tape | 11000 |
Comparative example 1
The differences between the magnetic barrier material and the example 1 are: the first nanocrystalline magnetic separation strip 21 in embodiment 1 was selected instead of the ferrite magnetic separation material layer 10, and 4 layers of the first nanocrystalline magnetic separation strip 21 were used as the nanocrystalline magnetic separation material layer 20.
Comparative example 2
The differences between the magnetic barrier material and the example 1 are: the ferrite layer of example 1 was selected as the nanocrystalline magnetically insulating material layer 20.
Comparative example 3
The differences between the magnetic barrier material and the example 1 are: the first nanocrystalline magnetism isolating strip 21 is adopted in the nanocrystalline magnetism isolating material layer 20 to replace the second nanocrystalline magnetism isolating strip 22, the third nanocrystalline magnetism isolating strip 23 and the fourth nanocrystalline magnetism isolating strip 24 respectively.
Comparative example 4
The differences between the magnetic barrier material and the example 1 are: the second nanocrystalline magnetic isolation tape 22 is adopted in the nanocrystalline magnetic isolation material layer 20 to replace the first nanocrystalline magnetic isolation tape 21, the third nanocrystalline magnetic isolation tape 23 and the fourth nanocrystalline magnetic isolation tape 24 respectively.
Comparative example 5
The differences between the magnetic barrier material and the example 1 are: the third nanocrystalline magnetism isolating strip 23 is adopted in the nanocrystalline magnetism isolating material layer 20 to replace the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22 and the fourth nanocrystalline magnetism isolating strip 24 respectively.
Comparative example 6
The differences between the magnetic barrier material and the example 1 are: the fourth nanocrystalline magnetism isolating strip 24 is adopted in the nanocrystalline magnetism isolating material layer 20 to replace the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22 and the third nanocrystalline magnetism isolating strip 23 respectively.
The wireless charging efficiency results of examples 1 to 2 and comparative examples 1 to 6 are shown in table 3.
TABLE 3 Table 3
| Charging efficiency% | |
| Example 1 | 92.5 |
| Example 2 | 92.1 |
| Comparative example 1 | 89.5 |
| Comparative example 2 | 89.9 |
| Comparative example 3 | 87.5 |
| Comparative example 4 | 86.5 |
| Comparative example 5 | 86.9 |
| Comparative example 6 | 86.1 |
As can be seen from the above table, the wireless charging system using the magnetic sheet with the gradient magnetic permeability composite structure provided by the invention has higher power transmission efficiency than the wireless charging system using the conventional composite magnetic sheet with single magnetic permeability. But the transmission efficiency in embodiment 2 is reduced as compared with embodiment 1.
Example 3
The magnetic isolation composite material for wireless charging is shown in fig. 1, and comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20. Wherein the ferrite magnetism isolating material layer 10 in the magnetic sheet with the composite structure is formed by PC95, and the thickness is 3mm; the nanocrystalline magnetism isolating material layer 20 comprises a first nanocrystalline magnetism isolating strip 21, a second nanocrystalline magnetism isolating strip 22, a third nanocrystalline magnetism isolating strip 23 and a fourth nanocrystalline magnetism isolating strip 24 which are sequentially stacked, wherein the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22, the third nanocrystalline magnetism isolating strip 23 and the fourth nanocrystalline magnetism isolating strip 24 are formed by bonding 1-30 layers of single-layer nanocrystalline magnetism isolating strips through a bonding agent, the average thickness of each single-layer nanocrystalline magnetism isolating strip is 0.018-0.022 mm, the average thickness of each nanocrystalline magnetism isolating strip is 0.75mm, and the first nanocrystalline magnetism isolating strip 21 is arranged close to the ferrite magnetism isolating material layer 10. The magnetic permeability of each nanocrystalline magnetic separation strip in the ferrite magnetic separation material layer 10 and the nanocrystalline magnetic separation material layer 20 is shown in table 4.
TABLE 4 Table 4
| Material | Permeability mu', H/m |
| Ferrite magnetism isolating material layer | 3300 |
| First nanocrystalline spacer tape | 900 |
| Second nanocrystalline spacer tape | 4500 |
| Third stepNanocrystalline magnetic tape | 9000 |
| Fourth nanocrystalline spacer tape | 15000 |
Comparative example 7
The differences between the magnetic barrier material and example 3 are: the first nanocrystalline magnetic separation strip 21 in example 3 was selected instead of the ferrite magnetic separation material layer 10, and 4 layers of the first nanocrystalline magnetic separation strip 21 were used as the nanocrystalline magnetic separation material layer 20.
The wireless charging efficiency results of example 3 and comparative example 7 are shown in 5.
TABLE 5
| Charging efficiency% | |
| Example 3 | 92.2 |
| Comparative example 7 | 87.1 |
As can be seen from the above table, the wireless charging system using the magnetic sheet with the gradient magnetic permeability composite structure provided by the invention has higher power transmission efficiency than the wireless charging system using the conventional composite magnetic sheet with single magnetic permeability. But the transmission efficiency in embodiment 3 is reduced as compared with embodiment 1.
Example 4
A magnetic isolation composite material for wireless charging comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20. Wherein the ferrite magnetism isolating material layer 10 in the magnetic sheet with the composite structure is formed by PC95, and the thickness is 3mm; the nanocrystalline magnetism isolating material layer 20 is formed by bonding 120 layers of single-layer nanocrystalline magnetism isolating tapes, the magnetic permeability of the 1 st layer of single-layer nanocrystalline magnetism isolating tape is 900H/m, the later 119 layers, the speed increase of the magnetic permeability of each layer is 100H/m, namely the magnetic permeability of the 2 nd layer of single-layer nanocrystalline magnetism isolating tape is 1000H/m, and the like, the magnetic permeability of the 120 th layer of single-layer nanocrystalline magnetism isolating tape is 120800H/m. The average thickness of each single-layer nanocrystalline spacer tape is 0.018-0.022 mm, the thickness of the nanocrystalline magnetic spacer material layer 20 is 3mm, and the 1 st layer of single-layer nanocrystalline spacer tape is arranged close to the ferrite magnetic spacer material layer 10. The charging efficiency of the magnetic shielding composite for wireless charging in example 4 was tested to be 91.3%.
Example 5
A magnetic isolation composite material for wireless charging comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20. Wherein the ferrite magnetism isolating material layer 10 in the magnetic sheet with the composite structure is formed by PC95, and the thickness is 3mm; the nanocrystalline magnetism isolating material layer 20 comprises a first nanocrystalline magnetism isolating strip 21, a second nanocrystalline magnetism isolating strip 22, a third nanocrystalline magnetism isolating strip 23 and a fourth nanocrystalline magnetism isolating strip 24 which are sequentially stacked, wherein the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22, the third nanocrystalline magnetism isolating strip 23 and the fourth nanocrystalline magnetism isolating strip 24 are formed by bonding 1-30 layers of single-layer nanocrystalline magnetism isolating strips through a bonding agent, the average thickness of each single-layer nanocrystalline magnetism isolating strip is 0.018-0.022 mm, the average thickness of each nanocrystalline magnetism isolating strip is 0.75mm, and the first nanocrystalline magnetism isolating strip 21 is arranged close to the ferrite magnetism isolating material layer 10. The magnetic permeability of each nanocrystalline magnetic isolation strip in the ferrite magnetic isolation material layer 10 and the nanocrystalline magnetic isolation material layer 20 is shown in table 6. The charging efficiency of the magnetic shielding composite for wireless charging in example 5 was tested to be 91.1%.
TABLE 6
| Material | Permeability mu', H/m |
| Ferrite magnetism isolating material layer | 3300 |
| First nanocrystalline spacer tape | 200 |
| Second nanocrystalline spacer tape | 2000 |
| Third nanocrystalline spacer tape | 5000 |
| Fourth nanocrystalline spacer tape | 10000 |
Example 6
A magnetic isolation composite material for wireless charging comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20. Wherein the ferrite magnetism isolating material layer 10 in the magnetic sheet with the composite structure is formed by PC95, and the thickness is 3mm; the nanocrystalline magnetism isolating material layer 20 comprises a first nanocrystalline magnetism isolating strip 21, a second nanocrystalline magnetism isolating strip 22, a third nanocrystalline magnetism isolating strip 23 and a fourth nanocrystalline magnetism isolating strip 24 which are sequentially stacked, wherein the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22, the third nanocrystalline magnetism isolating strip 23 and the fourth nanocrystalline magnetism isolating strip 24 are formed by bonding 1-30 layers of single-layer nanocrystalline magnetism isolating strips through a bonding agent, the average thickness of each single-layer nanocrystalline magnetism isolating strip is 0.018-0.022 mm, the average thickness of each nanocrystalline magnetism isolating strip is 0.75mm, and the first nanocrystalline magnetism isolating strip 21 is arranged close to the ferrite magnetism isolating material layer 10. The magnetic permeability of each nanocrystalline magnetic separation strip in the ferrite magnetic separation material layer 10 and the nanocrystalline magnetic separation material layer 20 is shown in table 7. The charging efficiency of the magnetic shielding composite for wireless charging in example 6 was tested to be 90.9%.
TABLE 7
| Material | Permeability mu', H/m |
| Ferrite magnetism isolating material layer | 3300 |
| First nanocrystalline spacer tape | 2000 |
| Second nanocrystalline spacer tape | 5000 |
| Third nanocrystalline spacer tape | 10000 |
| Fourth nanocrystalline spacer tape | 20000 |
Example 7
The magnetic isolation composite material for wireless charging is shown in fig. 1, and comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20. Wherein the ferrite magnetism isolating material layer 10 in the magnetic sheet with the composite structure is formed by PC95, and the thickness is 3mm; the nanocrystalline magnetism isolating material layer 20 comprises a first nanocrystalline magnetism isolating strip 21, a second nanocrystalline magnetism isolating strip 22, a third nanocrystalline magnetism isolating strip 23 and a fourth nanocrystalline magnetism isolating strip 24 which are sequentially stacked, wherein the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22, the third nanocrystalline magnetism isolating strip 23 and the fourth nanocrystalline magnetism isolating strip 24 are formed by bonding 1-30 layers of single-layer nanocrystalline magnetism isolating strips through a bonding agent, the average thickness of each single-layer nanocrystalline magnetism isolating strip is 0.018-0.022 mm, the average thickness of each nanocrystalline magnetism isolating strip is 0.75mm, and the first nanocrystalline magnetism isolating strip 21 is arranged close to the ferrite magnetism isolating material layer 10. The magnetic permeability of each nanocrystalline magnetic isolation strip in the ferrite magnetic isolation material layer 10 and the nanocrystalline magnetic isolation material layer 20 is shown in table 8. The charging efficiency of the magnetic shielding composite for wireless charging in example 7 was tested to be 90.1%.
TABLE 8
| Material | Permeability mu', H/m |
| Ferrite magnetism isolating material layer | 3300 |
| First nanocrystalline spacer tape | 500 |
| Second nanocrystalline spacer tape | 1500 |
| Third nanocrystalline spacer tape | 6000 |
| Fourth nanocrystalline spacer tape | 9000 |
Example 8
The magnetic isolation composite material for wireless charging is shown in fig. 1, and comprises a ferrite magnetic isolation material layer 10 and a nanocrystalline magnetic isolation material layer 20. Wherein the ferrite magnetism isolating material layer 10 in the magnetic sheet with the composite structure is formed by PC95, and the thickness is 3mm; the nanocrystalline magnetism isolating material layer 20 comprises a first nanocrystalline magnetism isolating strip 21, a second nanocrystalline magnetism isolating strip 22, a third nanocrystalline magnetism isolating strip 23 and a fourth nanocrystalline magnetism isolating strip 24 which are sequentially stacked, wherein the first nanocrystalline magnetism isolating strip 21, the second nanocrystalline magnetism isolating strip 22, the third nanocrystalline magnetism isolating strip 23 and the fourth nanocrystalline magnetism isolating strip 24 are formed by bonding 1-30 layers of single-layer nanocrystalline magnetism isolating strips through a bonding agent, the average thickness of each single-layer nanocrystalline magnetism isolating strip is 0.018-0.022 mm, the average thickness of each nanocrystalline magnetism isolating strip is 0.75mm, and the first nanocrystalline magnetism isolating strip 21 is arranged close to the ferrite magnetism isolating material layer 10. The magnetic permeability of each nanocrystalline magnetic separation strip in the ferrite magnetic separation material layer 10 and the nanocrystalline magnetic separation material layer 20 is shown in table 9. The charging efficiency of the magnetic shielding composite for wireless charging in example 8 was 89.5% as tested.
TABLE 9
| Material | Permeability mu', H/m |
| Ferrite magnetism isolating material layer | 3300 |
| First nanocrystalline spacer tape | 100 |
| Second nanocrystalline spacer tape | 1000 |
| Third nanocrystalline spacer tape | 16000 |
| Fourth nanocrystalline spacer tape | 22000 |
Example 9
The differences from example 6 are: the ferrite magnetism isolating material layer 10 is formed by the DMR24, and the magnetic permeability is 2000H/m. The charging efficiency of the magnetic shielding composite for wireless charging in example 4 was tested to be 90.2%.
Example 10
The differences from example 6 are: the ferrite magnetism isolating material layer is formed by R4K, and the magnetic permeability is 4000H/m. The charging efficiency of the magnetic shielding composite for wireless charging in example 4 was tested to be 91.5%.
Example 11
The differences from example 6 are: the ferrite magnetism isolating material layer is formed by DMR95, and the magnetic permeability is 3000H/m. The charging efficiency of the magnetic shielding composite for wireless charging in example 4 was tested to be 91.1%.
Example 12
The differences from example 6 are: the ferrite magnetic isolation material layer is formed by DMR71, and the magnetic permeability is 3500H/m. The charging efficiency of the magnetic shielding composite for wireless charging in example 4 was tested to be 91.5%.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the magnetic isolation composite material for wireless charging with the structure can greatly reduce eddy current loss in the high-power charging process and reduce heat productivity, so that the magnetic isolation composite material has better electric energy transmission efficiency in the application process.
It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The magnetic isolation composite material for wireless charging is characterized by comprising a ferrite magnetic isolation material layer and a nanocrystalline magnetic isolation material layer which are arranged in a stacked mode, wherein the nanocrystalline magnetic isolation material layer comprises at least one multilayer nanocrystalline magnetic isolation strip, and the magnetic permeability of the multilayer nanocrystalline magnetic isolation strip gradually rises along the direction away from the ferrite magnetic isolation material layer.
2. The magnetic separator composite material for wireless charging according to claim 1, wherein the multi-layered nanocrystalline separator strip is formed by bonding 1 to 120 single-layered nanocrystalline separator strips, and the permeability of each single-layered nanocrystalline separator strip is 200 to 20000H/m.
3. The magnetic isolation composite material for wireless charging according to claim 2, wherein the multi-layer nanocrystalline magnetic isolation strip is formed by bonding 120 layers of single-layer nanocrystalline magnetic isolation strips, wherein the 1 st to 30 th layers are all first single-layer nanocrystalline magnetic isolation strips, the magnetic permeability is 200-2000H/m, the 31 st to 60 th layers are all second single-layer nanocrystalline magnetic isolation strips, the magnetic permeability is 2000-5000H/m, the 61 st to 90 th layers are all third single-layer nanocrystalline magnetic isolation strips, the magnetic permeability is 5000-10000H/m, the 91 st to 120 th layers are fourth single-layer nanocrystalline magnetic isolation strips, and the magnetic permeability is 10000-20000H/m.
4. The magnetic shielding composite material for wireless charging according to claim 3, wherein the multi-layer nanocrystalline shielding tape is formed by bonding 120 layers of single-layer nanocrystalline shielding tapes, wherein the 1 st to 30 th layers are all first single-layer nanocrystalline shielding tapes, the magnetic permeability is 700-1000H/m, the 31 st to 60 th layers are all second single-layer nanocrystalline shielding tapes, the magnetic permeability is 3000-4500H/m, the 61 st to 90 th layers are all third single-layer nanocrystalline shielding tapes, the magnetic permeability is 7000-9000H/m, the 91 st to 120 th layers are fourth single-layer nanocrystalline shielding tapes, and the magnetic permeability is 11000-15000H/m.
5. A magnetic separator composite material for wireless charging according to any one of claims 1 to 3, wherein when at least two of the plurality of layers of nanocrystalline magnetic separator strips are included in the nanocrystalline magnetic separator material layer, each of the plurality of layers of nanocrystalline magnetic separator strips is disposed in parallel.
6. The magnetic separator composite material for wireless charging according to any one of claims 1 to 4, wherein the ferrite magnetic separator material layer is formed of ferrite magnetic sheets, and the magnetic permeability of the ferrite is 2000 to 4000H/m, preferably 3000 to 3500H/m.
7. The magnetic separator composite material for wireless charging according to claim 2, wherein the thickness of the ferrite magnetic separator material layer is 1-3mm, and the average thickness of the single-layer nanocrystalline magnetic separator tape is 0.018-0.022 mm.
8. A device comprising a wireless charging function, comprising an electromagnetic shielding assembly, wherein the electromagnetic shielding assembly comprises the magnetically isolated composite material for wireless charging of any one of claims 1 to 7.
9. The wireless charging function-containing device of claim 8, wherein the wireless charging function-containing device is selected from one or more of the group consisting of an electric car, a cell phone, a tablet computer, a digital camera, or a wearable mobile device.
10. Use of a magnetically isolated composite material for wireless charging according to any one of claims 1 to 7 in the field of wireless charging technology.
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