WO2022154228A1 - 전동 이동수단 충전용 복합형 자성복합체, 이를 포함하는 패드조립체 및 이를 포함하는 전동 이동수단 - Google Patents
전동 이동수단 충전용 복합형 자성복합체, 이를 포함하는 패드조립체 및 이를 포함하는 전동 이동수단 Download PDFInfo
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- WO2022154228A1 WO2022154228A1 PCT/KR2021/016115 KR2021016115W WO2022154228A1 WO 2022154228 A1 WO2022154228 A1 WO 2022154228A1 KR 2021016115 W KR2021016115 W KR 2021016115W WO 2022154228 A1 WO2022154228 A1 WO 2022154228A1
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- magnetic composite
- assembly
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Classifications
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- H—ELECTRICITY
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- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15358—Making agglomerates therefrom, e.g. by pressing
- H01F1/15366—Making agglomerates therefrom, e.g. by pressing using a binder
- H01F1/15375—Making agglomerates therefrom, e.g. by pressing using a binder using polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F27/24—Magnetic cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F27/255—Magnetic cores made from particles
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F27/28—Coils; Windings; Conductive connections
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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
- 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
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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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
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
Definitions
- An embodiment includes magnetic powders having a composite form bonded to each other by a polymer resin, and having excellent physical properties and sufficient impact resistance to be applied to an electric vehicle at the same time, a composite type magnetic composite for charging an electric vehicle, comprising the same It relates to a pad assembly and an electric moving means including the same.
- the electric vehicle charging system can be basically defined as a system that charges the battery mounted in the electric vehicle by using the power of a grid of commercial power or an energy storage device.
- Such an electric vehicle charging system may have various forms depending on the type of the electric transportation means.
- the electric vehicle charging system may include a conductive charging system using a cable or a non-contact wireless power transmission system.
- wireless power charging by a wireless power transmission system is a method of charging a battery by flowing current through electromagnetic induction, and the magnetic field generated by the current flowing in the primary coil of the charger is applied to the secondary coil of the battery An induced current is generated, which in turn charges the battery with chemical energy.
- This technology is as safe as the wired charging method because the contacts are not exposed and there is little risk of short circuit.
- the impact resistance and charging efficiency of the wireless power charging unit are more important in that the degree of shock that may be caused by an accident in the electric vehicle is large and it is related to the safety of the occupant of the vehicle.
- Patent Document 1 Korean Patent No. 10-1617403
- Patent Document 2 Korean Patent Publication No. 10-2015-0050541
- An object of the embodiment is to a receiving unit that generates an induced current by a power supply located outside the electric moving means in charging a battery corresponding to the power of the electric moving means, and has excellent properties and sufficient to be applied to a vehicle at the same time. It is to provide a composite type magnetic composite for charging electric moving means having impact resistance and electric moving means including the same.
- the power receiving pad assembly of the electric moving means for supporting the receiving coil; a receiving coil connected to the outside by a wire and positioned on the receiving pad; and a magnetic composite layer disposed above or below the receiving coil.
- the increase in inductance of the pad assembly after assembly based on before assembly is 25 (% ⁇ cm 3 /g) or more per unit density of the magnetic composite layer.
- the magnetic composite layer may include a magnetic composite including magnetic powders bonded to each other by a polymer resin and having an elongation at break of 0.5% or more.
- the magnetic composite layer may include a laminate of a magnetic composite including magnetic powders bonded to each other by a polymer resin and a magnetic nanocrystal grain.
- the increase in resistance of the pad assembly after assembly based on before assembly may be 40.0 (% ⁇ cm 3 /g) or less per unit density of the magnetic composite layer.
- the pad assembly may have a charging efficiency of 85% or more based on the application of a 5 mm thick magnetic composite layer to a receiving pad having a size of 35 cm X 35 cm.
- a pad assembly includes a receiving pad for supporting a receiving coil; a receiving coil connected to the outside by a wire and positioned on the receiving pad; and a magnetic composite layer disposed above or below the receiving coil; as an assembled pad assembly comprising, the charging efficiency of the pad assembly after assembly based on before assembly is 19 per unit density of the magnetic composite layer (%) ⁇ cm 3 /g) or more.
- the magnetic composite layer may include a laminate of a magnetic composite including magnetic powders bonded to each other by a polymer resin and a magnetic nanocrystal grain.
- the increase in resistance of the pad assembly after assembly based on before assembly may be 40.0 (% ⁇ cm 3 /g) or less per unit density of the magnetic composite layer.
- the electric moving means according to another embodiment includes the pad assembly described above.
- the embodiment it is useful to provide a hybrid type magnetic composite having excellent impact resistance suitable for wireless charging of an electric vehicle, a pad assembly including the same, and an electric vehicle including the same.
- the magnetic composite has excellent impact resistance and light weight, and enables wireless charging with excellent charging efficiency for electric vehicles, etc. when applied as a pad assembly applied to a power receiver.
- excellent charging efficiency can be well maintained even when an impact or repeated vibration is applied to the pad assembly.
- FIG. 1 is a configuration diagram illustrating a wireless power receiver for wireless charging of an electric vehicle according to an embodiment.
- FIG. 2 is a perspective view illustrating a wireless power receiver for wireless charging of an electric vehicle according to an embodiment.
- FIG. 3 is a perspective view illustrating a state in which a magnetic composite layer is disposed on a pad assembly according to an embodiment.
- FIG. 4 is a conceptual diagram illustrating a cross-section of the structure of a hybrid magnetic composite layer according to an embodiment.
- the expression “the amount of increase in X of the pad assembly after assembling relative to before assembly” refers to the “X value of the pad assembly before assembly” of the embodiment based on "The magnetic composite layer is included/arranged in the pad assembly and assembled "X value of the pad assembly” is expressed in %.
- the power transmission/reception module especially the reception module, which is applied to a moving means that applies electric force, such as an electric moving means
- its stability is important.
- the noise caused by the vibration can be transmitted as it is.
- the inventors of the embodiment said that when the magnetic sheet included in the receiving module is damaged by such an impact, the power receiving efficiency of the receiving module can be significantly reduced, and the physical properties that must have excellent physical properties within a predetermined size and volume are improved.
- the present invention is completed by contemplating how to do it, and embodiments are presented.
- the electric moving means may be, for example, a moving means using electricity as a main power source, such as an electric vehicle, an electric bus, an electric motorcycle, an electric bicycle, and an electric kickboard.
- FIG. 1 is a configuration diagram illustrating a wireless power receiver for wireless charging of an electric vehicle according to an embodiment
- FIG. 2 is a perspective view illustrating a wireless power receiver for wireless charging of an electric vehicle according to an embodiment
- FIG. 3 is an embodiment It is a perspective view illustrating a state in which the magnetic composite layer according to the example is disposed on the pad assembly.
- FIG. 4 is a conceptual diagram illustrating a cross-sectional view of the structure of the hybrid magnetic composite layer according to an embodiment. An embodiment will be described in more detail below with reference to FIGS. 1 to 4 .
- a pad assembly 500 for receiving power of an electric vehicle includes a receiving pad 100 supporting a receiving coil 200; a receiving coil 200 connected to the outside by a wire 210 and positioned on the receiving pad; and a magnetic composite layer 300 disposed above or below the receiving coil.
- the increase in inductance of the pad assembly after assembly based on before assembly may be 25 (% ⁇ cm 3 /g) or more per unit density of the magnetic composite layer. This means that the magnetic focusing force is excellent, and if the magnetic composite layer having these characteristics is applied to the pad assembly, the charging efficiency can be further improved.
- the magnetic composite layer 300 may include a laminate including i) a magnetic composite 310 or ii) a magnetic composite 310 and a magnetic nanocrystalline grained body 350 .
- the magnetic composite 310 includes magnetic powders coupled to each other by a polymer resin.
- the magnetic composite 310 may be in the form of a sheet having a constant area, or may be in the form of a block having a constant area and thickness.
- the magnetic composite layer 300 for an electric vehicle is included in the large area of the charging pad assembly 500 of the electric vehicle, specifically, may be included in an area of 200 cm 2 or more, may be included in an area of 400 cm 2 or more, and may be included in an area of 600 cm. It may be included in two or more areas.
- the magnetic composite layer 300 for an electric vehicle may be included in an area of 10,000 cm 2 or less. In this way, the magnetic composite layer 300 has a large area, and a method of arranging a plurality of magnetic composites may be applied.
- the individual magnetic composite 310 may have an area of 60 cm 2 or more, and an area of 90 cm 2 and may have an area of 95 to 900 cm 2 .
- the magnetic composite 310 for electric vehicles may have an elongation at break of 0.5% or more.
- the magnetic composite having such elongation at break is a characteristic that is difficult to obtain in a ceramic-based magnetic composite that does not apply a polymer.
- the elongation at break of the magnetic composite for electric vehicles may be 0.5% or more, may be 1% or more, and may be 2.5% or more.
- the upper limit of the elongation at break is no particular limitation on the upper limit of the elongation at break, but when the content of the polymer resin is increased to improve the elongation at break, physical properties such as inductance of the magnetic composite may be deteriorated, so the elongation at break is preferably 10% or less.
- An important feature of the magnetic composite 310 for electric vehicles is that there is little change in physical properties before and after impact.
- the magnetic composite 310 for electric vehicle may have an inductance change rate before and after the impact applied by free-falling from a height of 1 m may be less than 5%, and may be less than 3%. It is best that the change rate of the inductance is 0% which does not appear substantially before and after the impact. More specifically, the magnetic composite for an electric vehicle may have an inductance change rate of 0 to 3%, 0.001 to 2%, and 0.01 to 1.5% before and after an impact applied by free falling from a height of 1 m.
- the magnetic composite for electric vehicles having such an inductance change rate has a relatively small inductance change rate before and after impact, so that it is possible to provide a magnetic composite with improved stability.
- the magnetic composite 310 for electric vehicle may have a Q Factor change rate of 0 to 5%, 0.001 to 4%, and 0.01 to 2.5% before and after the impact applied by free-falling from a height of 1 m. These values are significantly superior to those of the ferrite magnetic sheet, meaning that the change in physical properties before and after impact is small, so that the stability and impact resistance of the magnetic composite are further improved.
- the magnetic composite 310 for electric vehicle may have a resistance change rate of 0 to 2.8%, 0.001 to 1.8%, and 0.1 to 1.0% before and after the impact applied by free falling from a height of 1 m. These values are significantly superior to those of ferrite magnetic composites, and the resistance value change before and after impact is small, so even if the magnetic composite is repeatedly applied in an environment where actual shock and vibration are applied, the resistance value is well maintained below a certain level has
- the magnetic composite 310 for electric vehicle may have a rate of decrease in charging efficiency before and after the impact applied by free-falling from a height of 1 m may be 0 to 6.8%, may be 0.001 to 5.8%, and may be 0.01 to 3.4%.
- This rate of decrease in charging efficiency means that the charging efficiency decreases to a fairly small extent even after impact, which means that a magnetic composite applied over a relatively large area can provide stable physical properties even if impact or distortion occurs repeatedly.
- the charging efficiency is a result of evaluation at less than 100 kHz, for example, 85 kHz, and is a result of evaluation in a band distinct from a frequency applied in a portable electronic device such as a mobile phone.
- the magnetic composite 310 for electric vehicles may have a block shape, may have a thickness of 1 mm or more, may have a thickness of 2 mm or more, may have a thickness of 3 mm or more, and may have a thickness of 4 mm or more.
- the block-shaped magnetic composite 310 for electric vehicles may have a thickness of 6 mm or less.
- the block-shaped magnetic composite can be manufactured by injection molding, etc., and has the advantage of being able to manufacture the magnetic composite with a relatively thick thickness.
- the magnetic composite 310 for electric vehicles may be in the form of a sheet, and may have a thickness of 80 um or more, and may have a thickness of 85 to 150 um.
- a conventional film or sheet manufacturing method can be applied to the manufacture of the magnetic composite in the form of a sheet, and there is an advantage in that the magnetic composite can be manufactured in a desired area and size with excellent yield.
- the magnetic composite 310 When the magnetic composite 310 for electric vehicle is laminated and applied in a sheet form, the magnetic composite 310 may be one in which 20 or more sheets of the magnetic composite in the sheet form are laminated, and 50 or more may be laminated. .
- the magnetic composite 310 for an electric vehicle may be stacked in a sheet form in less than 150 sheets, or may be stacked in 100 sheets or less.
- the polymer resin is characterized in that it is cured, and the magnetic composite 310 may contain 85 wt% or more of magnetic powder.
- the magnetic composite may include 85 to 99% by weight of the magnetic powder, and may include 88 to 99% by weight of the magnetic powder.
- the magnetic composite 310 for electric vehicles may have a magnetic permeability of 20 to 150,000 in a frequency region of less than 100 kHz.
- the magnetic composite 310 for an electric vehicle may have a magnetic permeability of 20 to 150,000 at a frequency of 85 kHz.
- the magnetic composite 310 for an electric vehicle may have a magnetic permeability of 30 to 300 in a frequency region of less than 100 kHz.
- the magnetic composite 310 for an electric vehicle may have a magnetic permeability of 30 to 300 at a frequency of 85 kHz.
- the magnetic composite 310 for an electric vehicle may have a magnetic permeability of 600 to 3,500 in a frequency region of less than 100 kHz.
- the magnetic composite 310 for an electric vehicle may have a magnetic permeability of 600 to 3,500 at a frequency of 85 kHz.
- the magnetic composite 310 for an electric vehicle may have a magnetic permeability of 10,000 to 150,000 in a frequency region of less than 100 kHz.
- the magnetic composite 310 for an electric vehicle may have a magnetic permeability of 10,000 to 150,000 at a frequency of 85 kHz.
- the magnetic composite 310 contains magnetic powder.
- Magnetic powders include permalloy; sandust; Fe-Si-Al, Fe-Si-Cr, or Fe-Si-B-Cu-Nb-based nanocrystalline; may be a magnetic metal powder comprising a powder or a mixed powder thereof.
- the Fe-Si-B-Cu-Nb-based nanocrystalline nanocrystals include 70 to 85 mol% of Fe, 10 to 29 mol% of Si and B, and 1 to 5 mol% of Cu and Nb. Examples include Fe 73.5 CuNb 3 Si 13.5 B 9 and the like. When such a nanocrystal is included in the magnetic metal powder, better shielding performance can be obtained.
- the magnetic powder may have a particle diameter of 3 nm to 1 mm.
- the magnetic composite 310 may have heat resistance that can withstand high temperature conditions and corrosion resistance that can withstand various corrosive environments.
- a curable resin As the polymer resin to which the magnetic powder is mixed, a curable resin may be used, and specifically, a photocurable resin, a thermosetting resin, and a high heat-resistant thermoplastic resin may be included.
- the curable resin may be exemplified by a polyurethane-based resin, an acrylic resin, a polyester resin, an isocyanate resin, or an epoxy resin, but is not limited thereto.
- the polymer resin may include a polyurethane-based resin, an isocyanate-based curing agent, and an epoxy-based resin.
- the polyurethane-based resin may have a number average molecular weight in the range of about 500 to 50,000 g/mol, in the range of about 10,000 to 50,000 g/mol, or in the range of about 10,000 to 40,000 g/mol.
- the isocyanate-based curing agent may be an organic diisocyanate.
- the isocyanate-based curing agent may be an aromatic diisocyanate, an aliphatic diisocyanate, a substituted aliphatic diisocyanate, or a mixture thereof.
- the epoxy-based resin examples include bisphenol-type epoxy resins such as bisphenol A epoxy resin, bisphenol F-type epoxy resin, bisphenol S-type epoxy resin, and tetrabromobisphenol A-type epoxy resin; spiro cyclic epoxy resin; naphthalene type epoxy resin; biphenyl type epoxy resin; terpene type epoxy resin; glycidyl ether type epoxy resins such as tris(glycidyloxyphenyl)methane and tetrakis(glycidyloxyphenyl)ethane; glycidyl amine type epoxy resins such as tetraglycidyl diaminodiphenylmethane; cresol novolac-type epoxy resin; and novolak-type epoxy resins such as phenol novolak-type epoxy resins, ⁇ -naprole novolak-type epoxy resins, and brominated phenol novolak-type epoxy resins. These epoxy resins can be used individually by 1 type or in combination of
- the magnetic composite 310 may include the polymer resin in an amount of 1 to 15% by weight, and may include it in an amount of 1 to 12% by weight.
- the magnetic composite 310 is based on the total weight of the polymer resin, 75 to 85% by weight of a polyurethane-based resin, 10 to 18% by weight of an isocyanate-based curing agent, and 3 to 10% by weight of an epoxy-based resin. (the remaining amount is magnetic powder).
- the polymer resin of such a composition is applied as the polymer resin described above, it is possible to provide a magnetic composite with excellent physical properties while making the composite easier to manufacture.
- the magnetic composite 310 can be manufactured by a sheet forming process such as mixing magnetic powder and a polymer resin composition to slurry it, then molding it into a sheet shape and curing (thermal curing, etc.), but has a large area having a constant thickness.
- the composite block may be manufactured by injection molding.
- a conventional sheeting or blocking method may be applied to the sheeting or blocking method, and there is no particular limitation on the specific method.
- the nanocrystalline magnetic material 350 includes a nanocrystalline magnetic material or a soft magnetic material, for example, a Fe-Si-Al-based nanocrystalline magnetic material, a Fe-Si-Cr-based nanocrystalline magnetic material, and Fe-Si-B-Cu.
- -Nb-based nanocrystalline magnetic material and the like may be applied, but is not limited thereto.
- the Fe-Si-B-Cu-Nb-based nanocrystalline includes 70 to 85 mol% of Fe, 10 to 29 mol% of Si and B, and 1 to 5 mol% of Cu and Nb Examples of the nanocrystalline material to be Fe 73.5 CuNb 3 Si 13.5 B 9 and the like are included.
- the magnetic composite layer 300 includes a laminate of the magnetic composite 310 and the magnetic nanocrystal grain 350
- the impact resistance is improved by the magnetic composite and the amount of increase in inductance by the nano-no-crystal grain magnetic body This has the advantage of being improved.
- the increase in inductance is significantly increased, the increase in resistance is reduced, and the effect of reducing the weight and improving the charging efficiency, which is difficult to obtain at the same time when a magnetic composite layer of a predetermined volume is applied, is obtained.
- the magnetic composite 310 and the magnetic nanocrystal grain 350 included in the magnetic composite layer 300 may be applied in a thickness ratio of 1: 0.0001 to 5.
- the thickness ratio is 1: less than 0.0001, the stacking effect of the magnetic nanocrystal grains may be substantially insignificant, and when it exceeds 1:5, cost effectiveness may be reduced.
- the magnetic composite 310 and the magnetic nanocrystal grain 350 included in the magnetic composite layer 300 may be applied in a thickness ratio of 1: 0.01 to 1, and may be applied in a thickness ratio of 0.01 to 0.5. and may be applied at a thickness ratio of 0.02 to 0.1, and may be applied at a thickness ratio of 0.03 to 0.7. In this range, when the magnetic composite and the magnetic nanocrystal grain are applied together, it is possible to provide a pad assembly having a faster charging rate.
- the increase in inductance of the pad assembly 500 after assembling based on before assembly may be 25 (% cm 3 /g) or more per unit density of the magnetic composite layer, and 30 (% cm 3 /g) or more. and may be 35.5 (% ⁇ cm 3 /g) or more, and 37 (% ⁇ cm 3 /g) or more.
- the increase in inductance of the pad assembly after assembly based on before assembly may be 50 (% cm 3 /g) or less per unit density of the magnetic composite layer, and 45 (% cm 3 /g) 3 /g) or less. This increase in inductance is equivalent to or higher than that of ferrite, which has a relatively heavy weight, is significantly improved compared to the case where only the magnetic composite itself is applied, and the impact resistance is also excellent at an improved level.
- the amount of increase in resistance of the pad assembly 500 after assembly based on before assembly may be 40.0 (% ⁇ cm 3 /g) or less per unit density of the magnetic composite layer, and 30.0 (% ⁇ cm 3 /g) or less, and , may be 26.0 (% ⁇ cm 3 /g) or less, and may be 20.0 (% ⁇ cm 3 /g) or less.
- the increase in resistance of the pad assembly 500 after assembly based on before assembly may have a negative value, and may be -20 (% ⁇ cm 3 /g) or more. This increase in resistance is a result of significantly reducing the resistance value that increases when a magnetic nanocrystalline grain is applied, and is considered to be an excellent physical property obtained by applying a magnetic composite and a magnetic nanocrystalline grain together.
- the charging efficiency of the pad assembly 500 after assembly on the basis of before assembly may be 19 (% ⁇ cm 3 /g) or more per unit density of the magnetic composite layer, and 20 (% ⁇ cm 3 /g) or more. have.
- the charging efficiency of the pad assembly 500 after assembly on the basis of before assembly may be 30 (% ⁇ cm 3 /g) or less per unit density of the magnetic composite layer, and 25 (% ⁇ cm 3 /g) may be below. This increase in charging efficiency is considered to be the result of remarkably improving the charging efficiency by the magnetic composite layer, especially when the pad assembly is applied under the limited conditions of a predetermined volume and area.
- the pad assembly 500 has a charging efficiency of 85% based on the application of the magnetic composite layer 300 with a thickness of 5mm to the receiving pad of 35.5m X 35.cm size to which the SAE J2954 WPT2 Z2 Class standard TEST standard coil and frame are applied. may be greater than, may be greater than or equal to 89%, may be greater than or equal to 99%, may be greater than or equal to 95%.
- the pad assembly 500 is based on the application of the magnetic composite layer 300 of 5mm thickness to the receiving pad of 35cm X 35cm size to which the SAE J2954 WPT2 Z2 Class standard TEST standard coil and frame are applied. , may be less than or equal to 150%, may have a negative value, and may be greater than or equal to -80%.
- the pad assembly 500 is based on the application of the magnetic composite layer 300 of 5mm thickness to the receiving pad of 35cm X 35cm size to which the SAE J2954 WPT2 Z2 Class standard TEST standard coil and frame are applied. .
- the electric vehicle 1 includes the pad assembly 500 for receiving power of the electric vehicle described above. Since the description of the pad assembly and the magnetic composite included therein overlaps with the above description, the description thereof will be omitted.
- the pad assembly 500 serves as a receiver for wireless charging of the electric vehicle and enables efficient charging of the electric vehicle together with the power supply unit 2 .
- Nylon 12 Nylon 12, 3020, Ubesta, Nylon 6, B40, BASF
- the previously prepared magnetic powder slurry was coated on a carrier film by a comma coater, and dried at a temperature of about 110° C. to form a dry magnetic composite.
- the dried magnetic composite was compression-hardened by a hot press process at a temperature of about 170° C. and a pressure of about 9 Mpa for about 60 minutes to obtain a sheet-type magnetic composite.
- the magnetic powder content of the thus prepared magnetic composite was about 90%, and the thickness of one sheet was about 100 um. 40 to 50 sheets of the sheet were stacked to form a magnetic composite having a thickness of about 4.8 mm, and then applied to the experiment.
- a hybrid magnetic sheet (thickness 5 mm) in which a magnetic nanocrystal sheet (manufactured by Hitachi, 0.2 mm thick) was placed on one side of the composite magnetic sheet (thickness 4.8 mm) prepared in Example 1 and then thermocompressed and fixed.
- the magnetic sheet of Example 2 was prepared.
- a PC-95 ferrite magnetic sheet (thickness of 5 mm) manufactured by TDK was used.
- SKC's magnetic nanocrystal grain magnetic sheet was laminated to a thickness of 5 mm and used.
- Elongation at break was measured using a UTM device (INSTRON 5982, INSTRON Corporation), and was measured only for sheet 70um before impact application by the method of ASTM D412 Type C.
- the rate of change of inductance was calculated by using an LCR Meter (IM3533, HIOKI) to measure the inductance before and after applying the impact, and the rate of change was calculated in Equation (1) below.
- Inductance change rate 100 * (Inductance before impact application - Inductance after impact application)/(Inductance before impact application)
- the rate of change of resistance was calculated using the LCR Meter (IM3533, HIOKI Co., Ltd.) by measuring the inductance before and after applying the impact, and the rate of change was calculated in Equation (2) below.
- Q Factor (inductance x frequency x 2 ⁇ /resistance)
- the charging efficiency was calculated by Equation (4) below, respectively, in the case of applying the sheet before the shock application and the sheet after the shock application, respectively, and the charging efficiency was measured under the conditions of output power of 1000W and frequency of 85Khz.
- the rate of change of factors such as inductance, Q Factor, and resistance before and after impact was compared with the sheet of Comparative Example 1 in which the sheet of Example 1 having an average elongation at break of 3% was a ferrite sheet In the range of 0 to 1, it was confirmed that only a very slight change appeared before and after the impact application.
- the sheet of Comparative Example 1 showed a significant level of change in factors such as inductance, Q factor, and resistance. decrease could be observed. From this, it was confirmed that the sheet of Example 1 was more excellent to be applied stably as a receiving pad of a wireless charger in an environment prone to impact in the driving process, such as an electric vehicle.
- the amount of increase in inductance was calculated by measuring the inductance before assembling the magnetic material using an LCR Meter (IM3533, HIOKI Co.) and measuring the inductance of the PAD in which the magnetic material of Examples and Comparative Examples was assembled to calculate the increase in inductance.
- the amount of increase in resistance was measured by measuring the resistance before assembling the magnetic material using an LCR Meter (IM3533, HIOKI Co., Ltd.), and measuring the resistance of the PAD in which the magnetic material of Examples and Comparative Examples was assembled to calculate the increase in resistance.
- the total density of the manufactured magnetic material was calculated based on the volume and weight, and is shown in Table 3 below.
- Charging efficiency was measured by SAE J2954 WPT2 Z2 Class standard TEST method. Specifically, SAE J2954 WPT2 Z2 Class standard TEST standard coil and frame were applied, and 5T (mm) thick magnetic material, spacer, and aluminum plate were stacked to manufacture a receiving pad (35cmX35cm) and a transmitting pad (75cmX60cm), and output at 85 kHz frequency. The charging efficiency was evaluated under the same conditions with a power of 6 kw.
- Example 2 In the case of the composite sheet of Example 1, the density was low and the weight was relatively light in the same volume, which was excellent, the increase in inductance per unit density was also excellent, and the increase in resistance was also excellent with a negative value. In the case of Example 2, the increase in inductance was evaluated to be excellent at a level similar to that of ferrite or the magnetic nanocrystalline material itself, and the density was evaluated to be low compared to the ferrite as well as the magnetic nanocrystalline material, and thus had excellent physical properties.
- Example 1 Compared with Example 1, the resistance increase per unit density showed a slightly lower result, but due to the characteristics of the receiving pad mounted on an electric vehicle, there is a practical limit to the size of the receiving pad itself and the volume that the magnetic composite layer can occupy, In terms of application to volume, it was experimentally confirmed that it can bring about better charging efficiency than Example 1.
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Abstract
Description
충격인가 | 파단연신율 | 인덕턴스 | Q Factor | 저항 | 충전효율 | |
비교예 1 |
전 | 0 | 230 | 481 | 263 | 94 |
후 | 0 | 218 | 414 | 290 | 91 | |
실시예 1 |
전 | 3% | 225 | 444 | 279 | 93 |
후 | 3% | 225 | 442 | 280 | 93 |
(%) | 파단연신율 | 인덕턴스 변화량 |
Q Factor 변화율 | 저항 변화율 |
충전효율 감소 |
비교예 1 | 0 | 5.2 | 14 | 10.3 | 3 |
실시예 1 | 3 | 0 | 0.36 | 0.36 | 0 |
인덕턴스 증가량 (%) |
저항 증가량 (%) |
충전 효율 (%) |
밀도 (g/cm3) |
단위밀도당 인덕턴스증가량 (%·cm3/g)* |
단위밀도당 저항증가량 (%·cm3/g)* |
단위밀도당 충전효율 (%·cm3/g)* |
|
비교예 1 | 169 | -13 | 91 | 4.81 | 35.14 | -2.70 | 18.92 |
비교예 2 | 175 | 425 | 91 | 7.13 | 24.54 | 59.61 | 12.76 |
실시예 1 | 156 | -19 | 89 | 4.32 | 36.11 | -4.40 | 20.60 |
실시예 2 | 167 | 113 | 91 | 4.38 | 38.13 | 25.80 | 20.78 |
Claims (9)
- 수신코일을 지지하는 수신패드; 외부와 와이어로 연결되며 상기 수신패드 상에 위치하는 수신코일; 그리고 상기 수신코일의 위 또는 아래에 배치되는 자성복합체층;을 포함하는 조립된 패드조립체로,조립 전을 기준으로 하는 조립 후의 상기 패드조립체의 인덕턴스 증가량은 상기 자성복합체층의 단위밀도당 25 (%·cm3/g) 이상인, 전동 이동수단의 전력수신용 패드조립체.
- 제1항에 있어서,상기 자성복합체층은, 고분자 수지에 의해 서로 결합되는 자성분말들을 포함하고 파단연신율이 0.5 % 이상인 자성복합체를 포함하는, 전동 이동수단의 전력수신용 패드조립체.
- 제1항에 있어서,상기 자성복합체층은, 고분자 수지에 의해 서로 결합되는 자성분말들을 포함하는 자성복합체와 나노결정립 자성체의 적층체를 포함하는, 전동 이동수단의 전력수신용 패드조립체.
- 제1항에 있어서,조립 전을 기준으로 조립 후의 상기 패드조립체의 저항 증가량은 상기 자성복합체층의 단위밀도당 40.0 (%·cm3/g) 이하인, 전동 이동수단의 전력수신용 패드조립체.
- 제1항에 있어서,상기 패드조립체는 35cm X 35cm 크기의 수신패드에 5mm 두께의 자성복합체층을 적용한 것을 기준으로 충전효율이 85% 이상인, 전동 이동수단의 전력수신용 패드조립체.
- 수신코일을 지지하는 수신패드; 외부와 와이어로 연결되며 상기 수신패드 상에 위치하는 수신코일; 그리고 상기 수신코일의 위 또는 아래에 배치되는 자성복합체층;을 포함하는 조립된 패드조립체로,조립 전을 기준으로 하는 조립 후의 상기 패드조립체의 충전효율은 상기 자성복합체층의 단위밀도당 19 (%·cm3/g) 이상인, 전동 이동수단의 전력수신용 패드조립체.
- 제6항에 있어서,상기 자성복합체층은, 고분자 수지에 의해 서로 결합되는 자성분말들을 포함하는 자성복합체와 나노결정립 자성체의 적층체를 포함하는, 전동 이동수단의 전력수신용 패드조립체.
- 제6항에 있어서,조립 전을 기준으로 조립 후의 상기 패드조립체의 저항 증가량은 상기 자성복합체층의 단위밀도당 40.0 (%·cm3/g) 이하인, 전동 이동수단의 전력수신용 패드조립체.
- 제1항 또는 제6항에 따른 전동 이동수단의 전력수신용 패드조립체를 포함하는 전동 이동수단.
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JP2023532438A JP2023551276A (ja) | 2021-01-12 | 2021-11-08 | 電動移動手段充電用複合型磁性複合体、これを含むパッド組立体及びこれを含む電動移動手段 |
EP21919852.0A EP4254447A1 (en) | 2021-01-12 | 2021-11-08 | Composite-type magnetic composite for charging electric transportation means, pad assembly comprising same, and electric transportation means comprising same |
CN202180087947.9A CN116670788A (zh) | 2021-01-12 | 2021-11-08 | 用于充电电动交通工具的复合型磁性复合物、包括其的垫组件及包括其的电动交通工具 |
US18/334,536 US20230322099A1 (en) | 2021-01-12 | 2023-06-14 | Electric vehicle and pad assembly with composite type magnetic complex material |
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KR10-2021-0003726 | 2021-01-12 | ||
KR1020210003726A KR102540793B1 (ko) | 2021-01-12 | 2021-01-12 | 전기차 충전용 복합형 자성복합체, 이를 포함하는 패드조립체 및 이를 포함하는 전기차 |
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US18/334,536 Continuation US20230322099A1 (en) | 2021-01-12 | 2023-06-14 | Electric vehicle and pad assembly with composite type magnetic complex material |
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EP (1) | EP4254447A1 (ko) |
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KR (1) | KR102540793B1 (ko) |
CN (1) | CN116670788A (ko) |
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TW201812807A (zh) * | 2018-01-04 | 2018-04-01 | 富達通科技股份有限公司 | 由多個磁導體組成之磁導體結構 |
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US20230322099A1 (en) | 2023-10-12 |
JP2023551276A (ja) | 2023-12-07 |
KR20220101804A (ko) | 2022-07-19 |
EP4254447A1 (en) | 2023-10-04 |
TWI777864B (zh) | 2022-09-11 |
KR102540793B1 (ko) | 2023-06-05 |
TW202235303A (zh) | 2022-09-16 |
CN116670788A (zh) | 2023-08-29 |
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