WO2021101328A1 - 무선충전 장치 및 이를 포함하는 이동 수단 - Google Patents
무선충전 장치 및 이를 포함하는 이동 수단 Download PDFInfo
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- WO2021101328A1 WO2021101328A1 PCT/KR2020/016500 KR2020016500W WO2021101328A1 WO 2021101328 A1 WO2021101328 A1 WO 2021101328A1 KR 2020016500 W KR2020016500 W KR 2020016500W WO 2021101328 A1 WO2021101328 A1 WO 2021101328A1
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- Prior art keywords
- magnetic
- wireless charging
- charging device
- coil
- heat dissipation
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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
-
- 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
- B60L53/30—Constructional details of charging stations
- B60L53/302—Cooling of charging equipment
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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
- H01F27/02—Casings
- H01F27/025—Constructional details relating to cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- 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
- H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and 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—ELECTRIC POWER NETWORKS; 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—ELECTRIC POWER NETWORKS; 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; 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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- 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
Definitions
- the embodiment relates to a wireless charging device and a moving means including the same. More specifically, the embodiment relates to a wireless charging device with improved charging efficiency by applying a heat dissipation structure, and a moving means such as an electric vehicle including the same.
- the wireless power transmission power is wirelessly transmitted through space using an electromagnetic field resonance structure such as inductive coupling, capacitive coupling, or an antenna without physical contact between a transmitter supplying power and a receiver receiving power.
- an electromagnetic field resonance structure such as inductive coupling, capacitive coupling, or an antenna without physical contact between a transmitter supplying power and a receiver receiving power.
- the wireless power transmission is suitable for portable communication devices, electric vehicles, etc. that require a large-capacity battery, and since the contact point is not exposed, there is little risk of a short circuit, and a wired charging failure phenomenon can be prevented.
- Patent Document 1 Korean Patent Application Publication No. 2011-0042403
- a magnetic part 300 ′ is disposed adjacent to the coil part 200 ′ to improve wireless charging efficiency, and a shield part for electromagnetic shielding ( 400 ′) is disposed to be spaced apart from the magnetic part 300 ′ by a predetermined distance.
- the wireless charging device generates heat due to the resistance of the coil unit and the magnetic loss of the magnetic unit during the wireless charging operation.
- the magnetic part in the wireless charging device generates heat near the coil part with high electromagnetic wave energy density, and the generated heat changes the magnetic properties of the magnetic part, causing impedance mismatch between the transmitter and the receiver, reducing charging efficiency.
- the fever worsened again.
- a wireless charging device since such a wireless charging device is installed under the electric vehicle, it is difficult to implement a heat dissipation structure because it employs a sealed structure for dustproof, waterproof, and shock absorption.
- the object of the embodiment is to provide a wireless charging device and a moving means including the same with effective heat dissipation.
- the coil unit including a conductive wire; A shield part disposed on the coil part; A magnetic portion disposed between the coil portion and the shield portion; And an insulating heat dissipation part disposed inside the magnetic part or between the magnetic part and the coil part.
- a moving means including a wireless charging device, the wireless charging device comprising: a housing; A coil unit disposed in the housing and including a conductive wire; A shield part disposed on the coil part; A magnetic portion disposed between the coil portion and the shield portion; And an insulating heat dissipation part disposed inside the magnetic part or between the magnetic part and the coil part.
- the wireless charging device may effectively dissipate heat by providing a heat dissipation unit near the coil unit or the magnetic unit that generates heat.
- the heat dissipation unit is disposed between the magnetic unit and the coil unit to simultaneously process heat generated from the magnetic unit and the coil unit, or is disposed inside the magnetic unit to generate inside the magnetic unit. Can handle heat effectively.
- the heat dissipation unit may be connected to the shield unit to effectively discharge heat to the outside.
- the wireless charging device can be usefully used in a mobile means such as an electric vehicle that requires a large amount of power transmission between a transmitter and a receiver.
- FIG. 1 is an exploded perspective view of a wireless charging device according to an embodiment.
- FIGS. 2A to 2C show various examples of cross-sectional views of a wireless charging device.
- FIG. 3 is an exploded perspective view of a conventional wireless charging device.
- FIG. 4 shows an electric vehicle to which a wireless charging device is applied as a receiver.
- one component is formed above or below another component, in which one component is directly above or below another component, or indirectly through another component. It includes all that are formed by.
- FIG. 1 is an exploded perspective view of a wireless charging device according to an embodiment.
- a wireless charging device 10 includes a coil unit 200 including a conductive wire; A shield part 400 disposed on the coil part 200; A magnetic part 300 disposed between the coil part 200 and the shield part 400; And an insulating heat dissipation part 500 disposed inside the magnetic part 300 or between the magnetic part 300 and the coil part 200.
- the coil part includes a conductive wire.
- the conductive wire includes a conductive material.
- the conductive wire may include a conductive metal.
- the conductive wire may include at least one metal selected from the group consisting of copper, nickel, gold, silver, zinc, and tin.
- the conductive wire may have an insulating sheath.
- the insulating shell may include an insulating polymer resin.
- the insulating shell may include polyvinyl chloride (PVC) resin, polyethylene (PE) resin, Teflon resin, silicone resin, polyurethane resin, and the like.
- the diameter of the conductive wire may be, for example, in the range of 1 mm to 10 mm, in the range of 1 mm to 5 mm, or in the range of 1 mm to 3 mm.
- the conductive wire may be wound in a flat coil shape.
- the planar coil may include a planar spiral coil.
- the planar shape of the coil may be a circular shape, an oval shape, a polygonal shape, or a polygonal shape having rounded corners, but is not particularly limited.
- the outer diameter of the flat coil may be 5 cm to 100 cm, 10 cm to 50 cm, 10 cm to 30 cm, 20 cm to 80 cm, or 50 cm to 100 cm.
- the planar coil may have an outer diameter of 10 cm to 50 cm.
- the inner diameter of the flat coil may be 0.5 cm to 30 cm, 1 cm to 20 cm, or 2 cm to 15 cm.
- the number of windings of the flat coil may be 5 to 50 times, 10 to 30 times, 5 to 30 times, 15 to 50 times, or 20 to 50 times.
- the planar coil may be formed by winding the conductive wire 10 to 30 times.
- the spacing between the conductive wires in the planar coil shape may be 0.1 cm to 1 cm, 0.1 cm to 0.5 cm, or 0.5 cm to 1 cm.
- the shield part is disposed on the coil part.
- the shield unit suppresses electromagnetic interference (EMI) that may occur due to leakage of electromagnetic waves to the outside through electromagnetic wave shielding.
- EMI electromagnetic interference
- the shield part may be disposed to be spaced apart from the coil part by a predetermined distance.
- the separation distance between the shield part and the coil part may be 10 mm or more or 15 mm or more, and specifically 10 mm to 30 mm, or 10 mm to 20 mm.
- the material of the shield part may be, for example, metal, and accordingly, the shield part may be a metal plate, but is not particularly limited.
- the material of the shield unit may be aluminum, and other metal or alloy material having electromagnetic wave shielding ability may be used.
- the thickness of the shield portion may be 0.2 mm to 10 mm, 0.5 mm to 5 mm, or 1 mm to 3 mm.
- an area of the shield part may be 200 cm 2 or more, 400 cm 2 or more, or 600 cm 2 or more.
- the magnetic part is disposed between the coil part and the shield part.
- the magnetic part may be disposed to be spaced apart from the shield part by a predetermined distance.
- a separation distance between the magnetic part and the shield part may be 3 mm or more, 5 mm or more, 3 mm to 10 mm, or 4 mm to 7 mm.
- the magnetic part may be disposed to be spaced apart from the coil part by a predetermined distance.
- the separation distance between the magnetic part and the coil part may be 0.2 mm or more, 0.5 mm or more, 0.2 mm to 3 mm, or 0.5 mm to 1.5 mm.
- the magnetic part may be a polymer type magnetic material including a binder resin and magnetic powder.
- the magnetic part may include a metallic magnetic material, for example, a nanocrystalline magnetic material.
- the magnetic part may be a composite of the polymeric magnetic material and the nanocrystalline magnetic material.
- the magnetic part may include a polymer magnetic material, and specifically may include a binder resin and magnetic powder dispersed in the binder resin.
- magnetic powders are bonded to each other by the binder resin, so that defects may be reduced over a large area and damage due to impact may be reduced.
- the magnetic powder may be an oxide-based magnetic powder such as ferrite (Ni-Zn-based, Mg-Zn-based, Mn-Zn-based ferrite, etc.); Metallic magnetic powder such as permalloy, sanddust, and nanocrystalline magnetic material; Or it may be a mixture of these powders. More specifically, the magnetic powder may be sandblast particles having an Fe-Si-Al alloy composition.
- the magnetic powder may have a composition represented by Formula 1 below.
- X is Al, Cr, Ni, Cu, or a combination thereof
- Y is Mn, B, Co, Mo, or a combination thereof
- the average particle diameter of the magnetic powder may be in the range of about 3 nm to about 1 mm, about 1 ⁇ m to 300 ⁇ m, about 1 ⁇ m to 50 ⁇ m, or about 1 ⁇ m to 10 ⁇ m.
- the polymeric magnetic material may contain the magnetic powder in an amount of 50% by weight or more, 70% by weight or more, or 85% by weight or more.
- the polymeric magnetic material contains 50% to 99% by weight, 70% to 95% by weight, 70% to 90% by weight, 75% to 90% by weight, 75% to 95% by weight of the magnetic powder. It may be included in an amount of wt%, 80 wt% to 95 wt%, or 80 wt% to 90 wt%.
- the binder resin may be a curable resin.
- the binder resin may include a photocurable resin, a thermosetting resin, and/or a high heat-resistant thermoplastic resin, and preferably a thermosetting resin.
- a resin capable of being cured and exhibiting adhesiveness as described above it includes at least one functional group or moiety capable of curing by heat such as a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group or an amide group; Or it contains one or more functional groups or moieties that can be cured by active energy such as an epoxide group, a cyclic ether group, a sulfide group, an acetal group or a lactone group. You can use the resin.
- a functional group or moiety may be, for example, an isocyanate group, a hydroxyl group or a carboxyl group.
- the curable resin may be a polyurethane resin, an acrylic resin, a polyester resin, an isocyanate resin, or an epoxy resin having at least one or more functional groups or moieties as described above, but is not limited thereto.
- the binder resin may include a polyurethane-based resin, an isocyanate-based curing agent, and an epoxy-based resin.
- the polymeric magnetic material may contain the binder resin in an amount of 5% to 40% by weight, 5% to 20% by weight, 5% to 15% by weight, or 7% to 15% by weight.
- the high molecular weight magnetic body is, based on its weight, as the binder resin, 6% to 12% by weight of a polyurethane-based resin, 0.5% to 2% by weight of a isocyanate-based curing agent, and 0.3% to 1.5% by weight % Epoxy resin.
- the polymeric magnetic material can be prepared by a sheeting process such as mixing magnetic powder and a polymeric resin composition into a slurry, molding into a sheet, and curing.
- a sheeting process such as mixing magnetic powder and a polymeric resin composition into a slurry, molding into a sheet, and curing.
- Blocks can be manufactured by molding using a mold.
- a conventional sheeting or blocking method may be applied to the manufacturing method.
- the magnetic part may include a nanocrystalline magnetic material.
- the coil unit's quality factor Q factor: Ls/Rs
- Ls coil unit's inductance
- the nanocrystalline magnetic material may be an Fe-based nanocrystalline magnetic material, specifically, a Fe-Si-Al-based nanocrystalline magnetic material, a Fe-Si-Cr-based nanocrystalline magnetic material, or a Fe-Si-B It may be a Cu-Nb-based nanocrystalline magnetic material.
- the nanocrystalline magnetic material may be a Fe-Si-B-Cu-Nb-based nanocrystalline magnetic material, in which case, Fe is 70 element% to 85 element%, and the sum of Si and B is 10 element% To 29 element%, and the sum of Cu and Nb may be 1 element% to 5 element% (here, the element% means the percentage of the number of specific elements relative to the total number of elements).
- the Fe-Si-B-Cu-Nb-based alloy can be easily formed into a nanocrystalline magnetic material by heat treatment.
- the nanocrystalline magnetic material is prepared by, for example, a rapid cooling solidification method (RSP) by melt spinning of an Fe-based alloy, and no magnetic field for 30 minutes to 2 hours at a temperature range of 300° C. to 700° C. to obtain a desired magnetic permeability. It can be manufactured by performing heat treatment.
- RSP rapid cooling solidification method
- the heat treatment temperature is less than 300°C, nanocrystals are not sufficiently formed, so that the desired permeability is not obtained, and the heat treatment time may take a long time, and if the heat treatment temperature exceeds 700°C, the permeability may be significantly lowered by superheat treatment.
- the heat treatment temperature is low, it takes a long treatment time, and on the contrary, if the heat treatment temperature is high, the treatment time is preferably shortened.
- the nanocrystalline magnetic material is difficult to make a thick thickness in a manufacturing process, and may be formed as a thin film sheet having a thickness of, for example, 15 ⁇ m to 35 ⁇ m. Therefore, it is possible to form a magnetic portion by stacking several such thin-film sheets. In this case, an adhesive layer such as an adhesive tape may be inserted between the thin film sheets.
- the nanocrystalline magnetic material may be crushed by a pressure roll or the like at the rear end of the manufacturing process to form a plurality of cracks in the thin film sheet, thereby manufacturing a plurality of nanocrystalline fine pieces.
- the magnetic portion may be a magnetic sheet, a magnetic sheet stack, or a magnetic block.
- the magnetic part may have a large area, and specifically, may have an area of 200 cm 2 or more, 400 cm 2 or more, or 600 cm 2 or more. In addition, the magnetic part may have an area of 10,000 cm 2 or less.
- the large-area magnetic unit may be configured by combining a plurality of unit magnetic bodies, and in this case, the area of the unit magnetic body may be 60 cm 2 or more, 90 cm 2 , or 95 cm 2 to 900 cm 2 .
- the thickness of the magnetic sheet may be 15 ⁇ m or more, 50 ⁇ m or more, 80 ⁇ m or more, 15 ⁇ m to 150 ⁇ m, 15 ⁇ m to 35 ⁇ m, or 85 ⁇ m to 150 ⁇ m.
- Such a magnetic sheet may be manufactured by a method of manufacturing a conventional film or sheet.
- the stacked body of the magnetic sheet may be a stack of 20 or more magnetic sheets, or 50 or more magnetic sheets.
- the stacked body of the magnetic sheet may be a stack of 150 or less, or 100 or less magnetic sheets.
- the thickness of the magnetic block may be 1 mm or more, 2 mm or more, 3 mm or more, or 4 mm or more. In addition, the thickness of the magnetic block may be 6 mm or less.
- the magnetic unit may have a certain level of magnetic characteristics in the vicinity of a standard frequency for wireless charging of an electric vehicle.
- the standard frequency of wireless charging of the electric vehicle may be less than 100 kHz, for example, 79 kHz to 90 kHz, specifically 81 kHz to 90 kHz, and more specifically about 85 kHz, which may be used in mobile electronic devices such as mobile phones. It is a band that is distinct from the applied frequency.
- the magnetic permeability at a frequency of 85 kHz may vary depending on the material, but may be 5 or more, for example, 5 to 150,000, and may be 5 to 300, 500 to 3,500, or 10,000 to 150,000, depending on the specific material.
- the investment loss at the frequency of 85 kHz of the magnetic part may vary depending on the material, but may be 0 or more, for example, 0 to 50,000, and 0 to 1,000, 1 to 100, 100 to 1,000, or 5,000 to Can be 50,000.
- the magnetic part when the magnetic part is a polymer magnetic block containing magnetic powder and a binder resin, the magnetic permeability may be 5 to 130, 15 to 80, or 10 to 50 at a frequency of 85 kHz, and the investment loss is 0 to 20 , 0 to 15, or may be 0 to 5.
- the magnetic permeability may be 1,000 to 5,000, or 2,000 to 4,000 at a frequency of 85 kHz, and the investment loss may be 0 to 1,000, 0 to 100, or 0 to 50. have.
- the magnetic permeability at a frequency of 85 kHz may be 500 to 3,000, or 10,000 to 150,000, and the investment loss may be 100 to 1,000, or 8,000 to 50,000. have.
- the magnetic part may include a polymer type magnetic material, and the polymer type magnetic material may be elongated at a predetermined ratio.
- the elongation rate of the polymer magnetic material may be 0.5% or more.
- the elongation property is difficult to obtain in a ceramic-based magnetic material to which a polymer is not applied, and damage can be reduced even if a large-area magnetic portion is distorted by an impact.
- the elongation rate of the polymer magnetic material may be 0.5% or more, 1% or more, or 2.5% or more.
- the elongation is preferably 10% or less.
- the magnetic part Since the magnetic part has superior impact resistance compared to a general sintered ferrite magnetic body, there is little change in characteristics according to the impact of the wireless charging device using the magnetic part.
- the rate of change in properties before and after impact (%) can be calculated by the following equation.
- Characteristic change rate (%)
- the inductance change rate in the wireless charging device using the magnetic portion before and after the impact may be less than 5% or 3% or less. More specifically, the inductance change rate may be 0% to 3%, 0.001% to 2%, or 0.01% to 1.5%.
- the rate of change of the quality factor (Q factor) in the wireless charging device using the magnetic part before and after the impact is 0% to 5%, 0.001% to 4%, Alternatively, it may be 0.01% to 2.5%.
- the resistance change rate in the wireless charging device using the magnetic part before and after the impact is 0% to 2.8%, 0.001% to 1.8%, or 0.1% to 1.0 It can be %.
- the rate of change in charging efficiency in the wireless charging device using the magnetic part before and after the impact is 0% to 6.8%, 0.001% to 5.8%, or 0.01% to It could be 3.4%.
- the performance of the wireless charging device can be well maintained at a certain level even in an environment where actual shock or vibration is repeatedly applied.
- the wireless charging device may effectively discharge heat by providing a heat dissipation unit near the magnetic unit or coil unit that generates heat.
- the radiating part 500 may be disposed between the magnetic part 300 and the coil part 200.
- the radiating part 500 may be disposed between the magnetic part 300 and the coil part 200.
- the radiating part 500 may be disposed inside the magnetic part 300.
- the radiating part 500 may be disposed inside the magnetic part 300.
- the structure in which the heat dissipation part is disposed inside the magnetic part may be variously designed.
- the heat dissipation part may be inserted after molding a polymer-type magnetic body through a mold so as to have an inner space into which the heat dissipation part is inserted.
- a magnetic sheet laminate having a heat radiating part inserted therein may be manufactured.
- the heat dissipation unit may be selectively disposed in a portion where heat is generated.
- the heat dissipation part 500 may be disposed corresponding to a region in which the coil part 200 exists. Accordingly, the heat dissipation unit can effectively improve charging efficiency and heat dissipation characteristics even with a small area.
- the heat dissipation unit may effectively discharge heat by directly contacting a portion where heat is generated.
- the heat dissipation part may directly contact at least one of the magnetic part and the conductive wire.
- the heat dissipation part 500 may directly contact the magnetic part 300.
- the heat dissipation unit may be attached to a heat generating portion by a thermally conductive adhesive.
- the heat dissipation part may be attached to the magnetic part by a thermally conductive adhesive.
- the thermally conductive adhesive may include a thermally conductive material such as metal, carbon, ceramic, etc., and may be, for example, an adhesive resin in which thermally conductive particles are dispersed.
- the heat dissipation part may be thermally connected to the shield part in order to effectively discharge heat generated from the magnetic part or the coil part to the outside.
- the heat dissipation unit may be connected to the shield unit directly or through a thermally conductive medium.
- the heat dissipation part 500 may be connected to the shield part 400 through a thermally conductive medium 550.
- the thermally conductive medium may be composed of the same component as the heat dissipation unit or a different component.
- the thermally conductive medium may be made of a ceramic material or a carbon-based material.
- the thermally conductive medium may be made of the same material as the shield part, and may be made of, for example, aluminum.
- the heat dissipation unit may include a binder resin and insulating inorganic particles dispersed in the binder resin.
- binder resin polyimide resin, polyamide resin, polycarbonate resin, acrylonitrile-butadiene-styrene (ABS) resin, polypropylene resin, polyethylene resin, polystyrene resin, polyphenyl sulfide (PSS) resin, polyetheretherketone (PEEK) resin, silicone resin, acrylic resin, polyurethane resin, polyester resin, isocyanate resin, epoxy resin, etc.
- ABS acrylonitrile-butadiene-styrene
- PES polyphenyl sulfide
- PEEK polyetheretherketone
- the binder resin may be a curable resin.
- the binder resin may be a photocurable resin and/or a thermosetting resin, and in particular, may be a resin capable of being cured to exhibit adhesiveness.
- the binder resin includes at least one functional group or moiety capable of curing by heat such as a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group or an amide group; Or it contains one or more functional groups or moieties that can be cured by active energy such as an epoxide group, a cyclic ether group, a sulfide group, an acetal group or a lactone group. You can use the resin.
- Such a functional group or moiety may be, for example, an isocyanate group, a hydroxyl group, or a carboxyl group.
- the binder resin may be one or more of a silicone resin and an acrylic resin.
- the insulating inorganic particles may include a non-carbonous inorganic material. That is, the insulating inorganic particles are preferably not carbon-based fillers such as graphite or carbon nanotubes.
- the insulating inorganic particles may include ceramic particles.
- the insulating inorganic particles may include metal oxides or nitrides.
- the insulating inorganic particles may include at least one selected from the group consisting of silica, alumina, boron nitride, aluminum nitride, and magnesium oxide.
- the content of the insulating inorganic particles in the heat dissipation unit may be 70% to 90% by weight, 70% to 85% by weight, or 75% to 90% by weight. When the content of the insulating inorganic particles is within the above preferred range, it may be more advantageous in terms of thermal conductivity.
- the heat dissipation unit may have a sheet shape or a ribbon shape.
- the heat dissipation part may have the same area as the magnetic part, or may have a different area than the magnetic part.
- the heat dissipation part may have a large area like the magnetic part.
- the area of the radiating part may be 200 cm 2 or more, 400 cm 2 or more, or 600 cm 2 or more.
- the area of the heat dissipation part may be 10,000 cm 2 or less.
- the heat dissipation part may have an area smaller than that of the magnetic part.
- the heat dissipation part may have an area corresponding to the area of the coil part.
- the heat dissipation part may have a thickness of 0.1 mm to 10 mm, or 1 mm to 5 mm.
- the thickness of the heat dissipation part may be smaller than the thickness of the magnetic part.
- the thickness of the heat dissipation part may be 1/50 to 1/2, 1/10 to 1/2, or 1/5 to 1/3 of the thickness of the magnetic part.
- the heat dissipation part has insulation and thermal conductivity.
- the sheet resistance of the heat dissipation unit may be 10 4 ⁇ /sq or more, specifically 10 6 ⁇ /sq or more.
- the thermal conductivity of the heat dissipation unit may be 1 W/m ⁇ K or more, specifically 3 W/m ⁇ K or more, and more specifically 3 W/m ⁇ K to 30 W/m ⁇ K.
- the heat dissipation unit may have a sheet resistance of 10 4 ⁇ /sq or more and a thermal conductivity of 1 W/m ⁇ K or more.
- the thermal conductivity may be horizontal thermal conductivity.
- the wireless charging device may further include a housing accommodating the above-described components.
- the housing allows constituent elements such as the coil part, the shield part, and the magnetic part to be properly arranged and assembled.
- the material and structure of the housing may employ a material and structure of a conventional housing used in a wireless charging device, and may be appropriately designed according to the components included therein.
- a wireless charging device 10 includes a housing 600; A coil part 200 disposed in the housing 600 and including a conductive wire; A shield part 400 disposed on the coil part 200; A magnetic part 300 disposed between the coil part 200 and the shield part 400; And an insulating heat dissipating part 500 disposed inside the magnetic part 300 or between the magnetic part and the coil part 200.
- the wireless charging device 10 may further include a support part 100 supporting the coil part.
- the material and structure of the support part may be a material and structure of a conventional support part used in a wireless charging device.
- the support part may have a flat plate structure or a structure in which grooves are formed along the shape of the coil part to fix the coil part.
- the wireless charging device may further include a spacer for securing a space between the shield part and the magnetic part.
- the material and structure of the spacer may be a material and structure of a conventional spacer used in a wireless charging device.
- FIG. 4 shows a moving means to which a wireless charging device is applied, specifically an electric vehicle, and may be wirelessly charged in a parking area equipped with a wireless charging system for an electric vehicle by providing a wireless charging device at the bottom.
- the moving means 1 includes a wireless charging device according to the embodiment as a receiver 21.
- the wireless charging device serves as a wireless charging receiver 21 of the moving means 1 and can receive power from the wireless charging transmitter 22.
- the moving means includes a wireless charging device, and the wireless charging device includes a housing; A coil unit disposed in the housing and including a conductive wire; A shield part disposed on the coil part; A magnetic portion disposed between the coil portion and the shield portion; And an insulating heat dissipation part disposed inside the magnetic part or between the magnetic part and the coil part.
- the moving means may further include a battery receiving power from the wireless charging device.
- the wireless charging device may receive power wirelessly and transmit it to the battery, and the battery may supply power to a drive system of the moving means.
- the battery may be charged by power delivered from the wireless charging device or other additional wired charging device.
- the moving means may further include a signal transmitter for transmitting information on charging to a transmitter of a wireless charging system for a moving means.
- Information on such charging may include charging efficiency such as charging speed, charging status, and the like.
- the magnetic powder slurry prepared above was coated on a carrier film by a comma coater, and dried at a temperature of about 110° C. to form a polymer-type magnetic body.
- the polymeric magnetic material was compression-cured by a hot press process for about 60 minutes at a temperature of about 170° C. and a pressure of about 9 Mpa to obtain a sheet.
- the magnetic powder content in the sheet thus prepared was about 90% by weight, and the thickness of one sheet was about 100 ⁇ m. 40 to 50 sheets were stacked to obtain a magnetic portion having a thickness of about 4.8 mm.
- a PC-95 ferrite magnetic sheet (thickness 5 mm) manufactured by TDK was used as a comparative example.
- the elongation rate was measured using a UTM device (INSTRON 5982, INSTRON) on the magnetic part sample before impact by the method of ASTM D412 Type C.
- Characteristic change rate (%)
- SAE J2954 WPT1 Z2 Class standard TEST standard coil and frame are applied, and magnetic parts, spacers and aluminum plates are stacked to manufacture a receiving device (35.5 cm x 35.5 cm) and a transmitting device (67.48 cm x 59.1 cm). Measured at the kHz frequency.
- Inductance and resistance were measured using an LCR meter (IM3533, HIOKI).
- the quality factor (Q factor) was calculated by the equation of inductance x frequency x 2 ⁇ /resistance.
- Charging efficiency was measured under conditions of output power of 1000W and frequency of 85 kHz.
- the elongation of the ferrite sheet of Comparative Example was 0%, while the magnetic portion of Preparation Example 1 was measured to have an elongation of 3%.
- the magnetic portion of Preparation Example 1 was not only excellent in inductance, quality factor, and resistance of the device using the device before impact, but also the rate of change of the characteristics after impact was measured in the range of 0 to 1%.
- the ferrite sheet of the comparative example was measured to have a high rate of change in inductance, quality factor, and resistance of the device using the same after impact, and in particular, the rate of change (reduction rate) of charging efficiency was measured as high as 3%. From this, it was confirmed that the magnetic part of Preparation Example 1 compared to the conventional ferrite sheet is suitable for a wireless charging device in an environment where an impact is easily applied during a driving process such as an electric vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Transformer Cooling (AREA)
Abstract
Description
| 구 분 | 충격인가 | 신장율(%) | 인덕턴스(μH) | 품질계수 | 저항(mΩ) | 충전효율(%) |
| 비교예 | 전 | 0 | 230 | 481 | 263 | 94 |
| 후 | - | 218 | 414 | 290 | 91 | |
| 제조예 1 | 전 | 3 | 225 | 444 | 279 | 93 |
| 후 | - | 225 | 442 | 280 | 93 |
| 구 분 | 신장율(%) | 인덕턴스변화율(%) | 품질계수변화율(%) | 저항변화율(%) | 충전효율변화율(%) |
| 비교예 | 0 | 5.2 | 14 | 10.3 | 3 |
| 제조예 1 | 3 | 0 | 0.36 | 0.36 | 0 |
Claims (10)
- 전도성 와이어를 포함하는 코일부;상기 코일부 상에 배치된 쉴드부;상기 코일부와 상기 쉴드부 사이에 배치된 자성부; 및상기 자성부의 내부 또는 상기 자성부와 상기 코일부 사이에 배치된 절연성의 방열부를 포함하는, 무선충전 장치.
- 제 1 항에 있어서,상기 방열부가 바인더 수지 및 상기 바인더 수지 내에 분산된 절연성 무기 입자를 포함하는, 무선충전 장치.
- 제 2 항에 있어서,상기 절연성 무기 입자가 세라믹 입자를 포함하는, 무선충전 장치.
- 제 1 항에 있어서,상기 방열부는 104 Ω/sq 이상의 면저항 및 1 W/m·K 이상의 열전도도를 갖는, 무선충전 장치.
- 제 1 항에 있어서,상기 방열부가 상기 자성부 및 상기 전도성 와이어 중 적어도 하나에 직접 접촉하는, 무선충전 장치.
- 제 1 항에 있어서,상기 방열부가 상기 코일부가 존재하는 영역에 대응하여 배치되는, 무선충전 장치.
- 제 1 항에 있어서,상기 방열부가 상기 쉴드부와 직접 또는 열전도성 매개체를 통해 연결되는, 무선충전 장치.
- 제 1 항에 있어서,상기 자성부가 바인더 수지 및 상기 바인더 수지 내에 분산된 자성 분말을 포함하는, 무선충전 장치.
- 제 1 항에 있어서,상기 자성부가 나노결정성(nanocrystalline) 자성체를 포함하는, 무선충전 장치.
- 무선충전 장치를 포함하는 이동 수단으로서,상기 무선충전 장치가하우징;상기 하우징 내에 배치되고 전도성 와이어를 포함하는 코일부;상기 코일부 상에 배치된 쉴드부;상기 코일부와 상기 쉴드부 사이에 배치된 자성부; 및상기 자성부의 내부 또는 상기 자성부와 상기 코일부 사이에 배치된 절연성의 방열부를 포함하는, 이동 수단.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20890190.0A EP4064304A4 (en) | 2019-11-20 | 2020-11-20 | WIRELESS CHARGING DEVICE AND MEANS OF TRANSPORT THEREOF |
| US17/777,844 US12454188B2 (en) | 2019-11-20 | 2020-11-20 | Wireless charging device, and transportation means comprising same |
| CN202080080925.5A CN114730657B (zh) | 2019-11-20 | 2020-11-20 | 无线充电装置和包含该装置的交通工具 |
| JP2022527047A JP7638275B2 (ja) | 2019-11-20 | 2020-11-20 | 無線充電装置およびそれを含む移動手段 |
| JP2024175190A JP2025004136A (ja) | 2019-11-20 | 2024-10-04 | 無線充電装置およびそれを含む移動手段 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190149597A KR102755493B1 (ko) | 2019-11-20 | 2019-11-20 | 무선충전 패드, 무선충전 장치, 및 이를 포함하는 전기 자동차 |
| KR10-2019-0149597 | 2019-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021101328A1 true WO2021101328A1 (ko) | 2021-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2020/016500 Ceased WO2021101328A1 (ko) | 2019-11-20 | 2020-11-20 | 무선충전 장치 및 이를 포함하는 이동 수단 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12454188B2 (ko) |
| EP (1) | EP4064304A4 (ko) |
| JP (2) | JP7638275B2 (ko) |
| KR (1) | KR102755493B1 (ko) |
| CN (1) | CN114730657B (ko) |
| WO (1) | WO2021101328A1 (ko) |
Cited By (1)
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| JP2023088728A (ja) * | 2021-12-15 | 2023-06-27 | 大日本印刷株式会社 | コイル部品、送電装置、受電装置、及び電力伝送システム |
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| KR102923436B1 (ko) * | 2023-12-06 | 2026-02-05 | 주식회사 아모센스 | 차량용 시트의 무선 전력 송신 장치 |
| CN120881965B (zh) * | 2025-09-26 | 2025-12-12 | 长春汽车检测中心有限责任公司 | 一种复合无功谐振屏蔽线圈结构及其稳健优化方法 |
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| JP7830918B2 (ja) | 2021-12-15 | 2026-03-17 | 大日本印刷株式会社 | コイル部品、送電装置、受電装置、及び電力伝送システム |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102755493B1 (ko) | 2025-01-17 |
| JP2025004136A (ja) | 2025-01-14 |
| JP7638275B2 (ja) | 2025-03-03 |
| EP4064304A4 (en) | 2023-12-27 |
| EP4064304A1 (en) | 2022-09-28 |
| CN114730657B (zh) | 2025-08-01 |
| US12454188B2 (en) | 2025-10-28 |
| KR20210061719A (ko) | 2021-05-28 |
| JP2023501499A (ja) | 2023-01-18 |
| CN114730657A (zh) | 2022-07-08 |
| US20220410730A1 (en) | 2022-12-29 |
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