WO2016111496A1 - Feuille de blindage magnétique et module de transfert d'énergie sans fil la comprenant - Google Patents

Feuille de blindage magnétique et module de transfert d'énergie sans fil la comprenant Download PDF

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Publication number
WO2016111496A1
WO2016111496A1 PCT/KR2015/014391 KR2015014391W WO2016111496A1 WO 2016111496 A1 WO2016111496 A1 WO 2016111496A1 KR 2015014391 W KR2015014391 W KR 2015014391W WO 2016111496 A1 WO2016111496 A1 WO 2016111496A1
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WO
WIPO (PCT)
Prior art keywords
sheet
sheet layer
layer
wireless power
magnetic
Prior art date
Application number
PCT/KR2015/014391
Other languages
English (en)
Korean (ko)
Inventor
장길재
이동훈
장민식
Original Assignee
주식회사 아모센스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020150042149A external-priority patent/KR101656260B1/ko
Application filed by 주식회사 아모센스 filed Critical 주식회사 아모센스
Priority to CN201580072256.6A priority Critical patent/CN107112811B/zh
Priority to US15/541,463 priority patent/US10477743B2/en
Publication of WO2016111496A1 publication Critical patent/WO2016111496A1/fr

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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
    • 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
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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

Definitions

  • the present invention relates to a magnetic shielding sheet, and more particularly, when the shielding sheet is made of a magnetic material containing a metal component, it is possible to prevent oxidation of the side exposed to the outside and to prevent detachment of fine pieces from the side. Sheets and a wireless power transmission module comprising the same.
  • RFID Radio Frequency Identification
  • NFC Near Field Communication
  • WPC Wireless Charging
  • Interactive Pen Tablet have been added to mobile terminals including mobile phones and tablet PCs.
  • NFC is an electronic tag, a non-contact short-range communication module that uses the 13.56MHz frequency band and transmits data between terminals at a close distance of 10 cm.
  • NFC is not only mobile payment but also file transfer method, and is widely used in supermarkets or general stores to transmit goods information or travel information for visitors, transportation, and access control lock.
  • Android Beam a smartphone recently announced by Google, has a near field communication (NFC) -based short-range information transmission / reception function, which allows not only mobile payment but also photos, business cards, files, maps, websites, etc. It provides the ability to transfer to a phone.
  • NFC near field communication
  • the mobile terminal is provided with a wireless charging function for wirelessly charging the built-in battery
  • the wireless charging is a wireless power transmission module for supplying power to the wireless power receiving module and the wireless power receiving module built in the mobile terminal. Is made by the module.
  • a portable (combo) antenna unit including a NFC antenna for near field communication and a WPC antenna (or A4WP) antenna for wireless charging of a battery is installed in a portable terminal such as a smartphone.
  • the hybrid antenna unit is a magnetic field applied to generate a magnetic field of 100kHz to several tens of MHz in the process of performing a near field communication with a neighboring portable terminal or performing a wireless charging function to charge a battery.
  • the magnetic field shielding sheet is also laminated by using the first magnetic sheet and the second magnetic sheet to simultaneously satisfy the improvement of short range wireless communication performance and wireless charging performance.
  • the magnetic shielding sheet is exposed to the punching surface during the manufacturing process through the punching process after stacking the first magnetic sheet and the second magnetic sheet.
  • a punching surface is used in a product in a state of being exposed to the outside, a problem arises in that the fine pieces are separated from the punching surface and short the electronic circuit.
  • the salt spray test which is a kind of reliability test, is being strengthened.
  • the present invention has been made in view of the above, and when the shielding sheet is made of a magnetic material containing a metal component, the exposed surface of the shielding sheet is prevented from being oxidized or desorption of fine pieces of the metal component from the exposed surface.
  • An object of the present invention is to provide a magnetic shielding sheet capable of improving reliability and a wireless power transmission module including the same.
  • the present invention provides a magnetic shielding sheet applied to a combo-type antenna unit having at least two antennas using magnetic fields of different frequency bands, and shielding the magnetic field of the first frequency band.
  • a first sheet layer comprising a metal component to focus in the direction of?
  • a second sheet layer shielding the magnetic field of the second frequency band and focusing in a desired direction; It provides a magnetic shielding sheet comprising a; and fine stripping and anti-oxidation member provided on the side of the first sheet layer in order to prevent detachment or oxidation of the fine strip from the side of the first sheet layer.
  • the fine strip detachment and antioxidant member may be a protective film or a coating layer.
  • the first sheet layer may have the same size as the second sheet layer.
  • the fine strip detachment and oxidation prevention member may include a first portion covering the upper surface of the first sheet layer and a second portion extending from the first portion to cover the side surface of the first sheet layer, The second portion may extend to cover the side surface of the second sheet layer.
  • the first sheet layer may have a smaller size than the second sheet layer.
  • the micro scrap detachment and oxidation preventing member is formed from a first portion covering the upper surface of the first sheet layer and a second portion extending from the first portion and covering the side surface of the first sheet layer and the second portion. It may include a third portion extending to cover a portion of the second sheet layer, the upper surface of the second sheet layer is provided with a buffer layer on the outer periphery of the first sheet layer to surround the first sheet layer and The two sheet layer may be provided to match the size of the sum of the first sheet layer and the buffer layer.
  • the buffer layer may be made of nonmagnetic material.
  • the magnetic field of the first frequency band is for wireless power transmission
  • the magnetic field of the second frequency band is for short range communication
  • the first sheet layer is disposed to correspond to the antenna for wireless power transmission
  • the second sheet layer May be disposed to correspond to the antenna for short range communication.
  • the fine strip detachment and antioxidant member is a polymer resin including at least one selected from wax, epoxy resin, melanin resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA) It may include.
  • first sheet layer and the second sheet layer may be made of a magnetic material having different permeability.
  • first sheet layer is a ribbon sheet including at least one of an amorphous alloy and a nano grain alloy
  • second sheet layer may be a ferrite sheet or a polymer sheet.
  • the first sheet layer may be laminated in multiple layers of a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy
  • the ferrite sheet may be made of Mn-Zn ferrite or Ni-Zn ferrite.
  • first sheet layer and the second sheet layer may be separated into a plurality of fine pieces.
  • the plurality of fine pieces may be entirely insulated or partially insulated between neighboring fine pieces, the plurality of fine pieces may have a size of 1 ⁇ m ⁇ 3mm, the plurality of fine pieces are made of atypical Can be.
  • micro scrap detachment and antioxidant member may be attached via an adhesive including a non-conductive component.
  • the present invention includes an antenna unit including a wireless power transmission antenna and a near field communication antenna; And the above-described shielding sheet disposed on one surface of the antenna unit and focusing in a required direction by shielding a magnetic field generated by the antenna unit.
  • the antenna unit may further include an antenna for MST.
  • the total thickness of the wireless power transmission module may be 0.15 ⁇ 0.6mm.
  • the total thickness of the wireless power transmission module may be 0.3mm.
  • the present invention by providing a fine stripping and anti-oxidation member on the side of the sheet layer exposed to the outside to prevent oxidation through contact with air and / or moisture and to prevent the separation of the fine strip from the side separated It is possible to prevent the short circuit of the internal circuit due to fine fragments.
  • FIG. 1 is a cross-sectional view showing a magnetic shielding sheet according to an embodiment of the present invention
  • 2a to 2d is a view showing a variety of modifications of the fine strip detachment and oxidation prevention member applied to the magnetic shielding sheet according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional view showing another form of the first sheet layer in the magnetic shielding sheet according to the embodiment of the present invention.
  • FIG. 4 is a perspective view schematically showing a wireless power transmission module according to an embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of FIG. 4,
  • FIG. 6 is a view schematically showing a state in which the wireless power transmission module according to an embodiment of the present invention is applied to a portable terminal.
  • the wireless power transmission module 100 includes an antenna unit 110, a shielding sheet 120, and a fine stripping and oxidation preventing member 130. Include.
  • the antenna unit 110 includes a portable electronic device such as a mobile phone, a PDA, a PMP, a tablet, a multimedia device, and the like and at least one antenna operating in a predetermined frequency band.
  • a portable electronic device such as a mobile phone, a PDA, a PMP, a tablet, a multimedia device, and the like and at least one antenna operating in a predetermined frequency band.
  • the antenna may be composed only of a circular, oval or square flat coil wound around the clockwise or counterclockwise direction, but is not limited thereto, and a conductor such as a copper foil is looped on at least one surface of the circuit board 112.
  • the pattern may be formed in a shape or may be formed as a loop-shaped metal pattern on the circuit board 112 using conductive ink.
  • the antenna when the antenna is formed in a metal pattern on the circuit board 112, the metal pattern may be formed on one surface of the circuit board or both surfaces.
  • the antenna unit 110 may have one surface of the circuit board 112 having at least one antenna formed in a printed pattern attached to one surface of the shielding sheet 120.
  • the circuit board 112 is a material which is a substrate on which at least one antenna pattern and a circuit portion are formed, and is a material having heat resistance and pressure resistance and having flexibility.
  • a film such as PI or PET, which is a thermosetting polymer film, may be employed as the circuit board 112.
  • the antenna unit 110 may be provided on one surface of the shielding sheet 120, may be provided in plurality, it may be fixed to one surface of the shielding sheet 120 via an adhesive layer.
  • the adhesive layer may be a bond, PVC, rubber or double-sided tape and the like having adhesive properties, and may include a component having conductivity.
  • Such an antenna unit 110 may be configured as a combo type of a plurality of antennas operating in different frequency bands.
  • the antenna unit 110 may include an antenna operating in a first frequency band and an antenna operating in a second frequency band, as shown in FIG. 4.
  • the first frequency band may be 100 to 350 kHz or 6.78 MHz
  • the second frequency band may be 13.56 MHz
  • the antenna operating in the first frequency band is for wireless power transfer. It may be an antenna 114c and the antenna 114a operating in the second frequency band may be an antenna for near field communication.
  • the wireless power transmission antenna 114c serves to wirelessly transmit power by using an inductive coupling method or a magnetic resonance method.
  • the wireless power transmission antenna 114c may also function as a receiving antenna (Rx coil) or a transmitting antenna ( It may also serve as a Tx coil.
  • the wireless power transmission antenna 114c may be a wireless charging antenna for charging a main battery of a portable device through a magnetic induction method or a magnetic resonance method, or wireless power delivered in a magnetic induction method or a magnetic resonance method. It may be a power feeding antenna or a power receiving antenna for transmitting and receiving a signal to use as a driving power source.
  • the antenna is formed in a conductive pattern in a rectangular shape having a fine line width along the periphery of the circuit board 112, and the antenna for wireless power transmission. Since 114c is required to transmit power and uses a lower frequency band than the near field communication antenna 114a, the line 114c may have a line width wider than the line width of the near field communication antenna 114a inside the near field communication antenna 114a.
  • the antenna unit 110 may further include an antenna for magnetic secure transmission (MST) 114b in a region between the near field communication antenna 114a and the wireless power transmission antenna 114c.
  • MST magnetic secure transmission
  • the shielding sheet 120 is made of a plate-like member having a predetermined area, and serves to shield the magnetic field generated by the antenna unit 110 and to focus in the direction of the required.
  • the shielding sheet 120 may include sheet layers 121 and 122 of different types so as to increase the performance of the antenna in response to a plurality of antennas operating in different frequency bands.
  • the shielding sheet 120 shields the magnetic field of the first frequency band, and shields the magnetic field of the first sheet layer 121 and the second frequency band while focusing in the required direction, and also the required direction.
  • the second sheet layer 122 is focused to.
  • the first sheet layer 121 is disposed in an area corresponding to the antenna operating in the first frequency band
  • the second sheet layer 122 is an area corresponding to the antenna operating in the second frequency band. Is placed on.
  • the first sheet layer 121 is to increase the performance of the wireless power transmission antenna 114c operating in the first frequency band, for example, charging efficiency or power transmission efficiency, and the second sheet layer 122 ) Can increase the performance of the near field communication antenna 114a operating in the second frequency band, for example, wireless recognition.
  • the first sheet layer 121 and the second sheet layer 122 may be provided to have different permeability.
  • the first sheet layer 121 may be provided to have a magnetic permeability of 100 to 1000, preferably 900.
  • the permeability of the first sheet layer 121 is not limited thereto, and may be appropriately changed according to design conditions.
  • the first sheet layer 121 may be a ribbon sheet including at least one of an amorphous alloy and a nano grain alloy
  • the second sheet layer 122 may be a polymer sheet or a ferrite sheet.
  • the shielding sheet 120 is configured by stacking a plurality of magnetic sheets having different magnetic permeability and by placing the plurality of magnetic sheets corresponding to the corresponding antennas, thereby increasing the performance of each antenna.
  • the amorphous alloy and the nano-crystalline alloy may be used a Fe-based or Co-based magnetic alloy, it is preferable to use a Fe-based magnetic alloy in consideration of the material cost.
  • the amorphous alloy and the nanocrystalline alloy may include a three-element alloy or a five-element alloy, for example, the three-element alloy includes Fe, Si and B, the five-element alloy is Fe, Si, It may include B, Cu and Nb.
  • the ferrite sheet may be made of a sintered ferrite sheet, and may be made of Mn-Zn ferrite or Ni-Zn ferrite.
  • the ferrite sheet may be made of Ni-Zn sintered ferrite.
  • the polymer sheet may be made of magnetic powder and resin having a high permeability such as amorphous alloy powder, soft magnetic powder, and sand dust.
  • the first sheet layer 121 may be provided to have a relatively smaller size than the second sheet layer 122 disposed below, as shown in FIG. 1.
  • the first sheet layer 121 is provided to have a size including an area of the wireless power transmission antenna 114c disposed inside the short range communication antenna 114a. Accordingly, by covering the entire area of the wireless power transmission antenna 114c through the first sheet layer 121, it is possible to effectively improve the performance of the wireless power transmission antenna.
  • the first sheet layer 121 for improving the performance of the wireless power transmission antenna 114c is not disposed directly above the short range communication antenna 114a, the first sheet layer 121 is near. This is to prevent affecting the performance of the communication antenna 114a.
  • the first sheet layer 121 is provided to have an area that does not exceed an inner region of the near field communication antenna 114a.
  • the first sheet layer 121 is provided to have an appropriate area including an inner region of the near field communication antenna 114a but not including an area directly above the near field antenna 114a.
  • the first sheet layer 121 may be provided to have a size including an upper region of the MST antenna 114b. Note that it may be provided to have a size that does not include the area directly above the antenna (114b).
  • the buffer layer 136 is disposed to surround the outer periphery of the first sheet layer 121 Can be.
  • the combined size of the first sheet layer 121 and the buffer layer 136 may be provided to match the size of the second sheet layer 122 (see FIG. 2C).
  • the buffer layer 136 when the buffer layer 136 is disposed to surround the side of the first sheet layer 121, the buffer layer 136 may be formed of a nonmagnetic material so as not to affect the performance of the near field communication antenna 114a disposed below. Note that the same material as the second sheet layer 122 may be used to increase the performance of the near field communication antenna 114a.
  • first sheet layer 121 ′ may be provided to have the same size as the second sheet layer 122 for convenience of manufacture (see FIGS. 2A and 2B).
  • the same size means that the width and the length excluding the thickness have the same value, or the radius except the thickness has the same value, and the cross-sectional areas facing each other are the same.
  • the first sheet layer (121, 121 ′) is a thin ribbon sheet (121a, 121b, 121c) containing at least one of a plurality of amorphous alloys and nano-crystalline alloy may be revealed that may be composed of a multilayer (Fig. 3).
  • the bonding member 121d is interposed between the ribbon sheets to form a multilayer.
  • the ribbon sheet of the will be integrated.
  • the bonding member 121d may include a non-conductive component, and the bonding member 121d may be provided as or may be provided in a form in which is applied to one or both surfaces of the substrate provided in a film form. .
  • the first sheet layers 121 and 121 'for improving the performance of the wireless power transmission antenna operating in the first frequency band are flake-processed to reduce the generation of eddy currents by increasing the overall resistance and separating the plurality of fine pieces into pieces.
  • the plurality of fine pieces may be entirely insulated or partially insulated from neighboring fine pieces, and each of the fine pieces may be irregularly random.
  • the fine pieces may have a size of 1 ⁇ m ⁇ 3mm.
  • the ribbon sheet is flake-treated after heat treatment to be separated into a plurality of fine pieces.
  • the plurality of microflakes may be entirely insulated or partially insulated from neighboring fine pieces.
  • each of the fine pieces may be provided with a size of 1 ⁇ m ⁇ 3mm, each of the fine pieces may be randomly formed in a shape irregular.
  • each ribbon sheet may be integrated into a multilayer through the bonding member.
  • the bonding member may include a non-conductive component.
  • first sheet layers 121 and 121 are not limited to the above-mentioned types, and any materials having magnetic properties may be used.
  • the second sheet layer 122 for improving the performance of the short-range communication antenna operating in the second frequency band may also be formed into a plurality of pieces by being flaked.
  • the second sheet layer 122 is formed of a brittle ferrite sheet, the ferrite sheet is separated into a plurality of fine pieces, thereby increasing the flexibility of the sheet itself and changing the characteristics of the sheet itself due to cracking and separation. It can be minimized.
  • the fine strip detachment and oxidation preventing members 130, 130 ', 130 ", 230 are provided on the exposed surface of the magnetic shielding sheet according to the present invention so that at least some of the exposed surfaces of the shielding sheet are not exposed to the outside.
  • the fine strip detachment and oxidation prevention member (130,130 ', 130 ", 230) is a case where the shielding sheet is made of a magnetic material containing a metal component to prevent the side of the shielding sheet corresponding to the punching surface to be exposed to the outside And / or to prevent oxidation through contact with moisture and to prevent detachment of fine pieces of metal from the side surface, thereby improving product reliability.
  • the first sheet layers 121 and 121 ' are made of a magnetic material containing a metal component, such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy
  • the side surfaces of the first sheet layers 121 and 121' are formed. Becomes the punching surface formed by the punching process in the manufacturing process. Accordingly, when the fine pieces of the metal component such as ribbon pieces fall off from the punching surface, the separated fine pieces generate a short in the electronic circuit.
  • the first sheet layers 121 and 121 ' are made of a magnetic material containing a metal component, such as a ribbon sheet containing at least one of an amorphous alloy and a nanocrystalline alloy, the first sheet layers 121 and 121 corresponding to the punched surface
  • the fine stripping and anti-oxidation members 130, 130 ', 130 ", 230 are provided to surround the side surface of the " To prevent them from being separated from the side surfaces of the first sheet layers 121 and 121 ', which are punched surfaces.
  • the first sheet layers 121 and 121 ' are made of a material containing a metal component, such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy, fine pieces of the metal component are detached from the side surface.
  • a metal component such as a ribbon sheet including at least one of an amorphous alloy and a nano-crystalline alloy
  • the adhesive 134 that is applied to at least one surface of the micro scrap detachment and oxidation preventing members 130, 130 ′, 130 ′′, 230 may include fine pieces separated from the side surfaces of the first sheet layers 121 and 121 ′ on the punching surface. It may be provided with an adhesive including a non-conductive component to be kept in the bonded state.
  • the fine strip detachment and oxidation preventing members 130, 130 ', 130 ", 230 may be provided in the form of a sheet of a protective film, the liquid or gel-like coating layer through the dipping, spraying, printing, etc., the first sheet layer It may be provided in the form applied to the side of (121,121 ').
  • the fine stripping and anti-oxidation member (130,130 ', 130 ", 230) is a wax, epoxy resin, melanin resin, silicone resin, acrylic resin, ethylene propylene rubber resin (EPDM) and polyvinyl alcohol resin (PVA) It may be a polymer resin containing at least one selected.
  • the protective film is polyethylene terephthalate (PET) film, polypropylene (PP) film, polyterephthalate Fluorine resin films such as (PTFE) may be used.
  • the fine stripping and oxidation preventing members 130, 130 ′ and 130 ′′ include a second portion 132 covering at least the side surfaces of the first sheet layers 121 and 121 ′ as shown in FIGS. 1 and 2.
  • a first portion 131 covering the upper surfaces of the first sheet layers 121 and 121 ′ may be included for convenience of manufacturing and increase of adhesiveness.
  • the fine strip detachment and oxidation preventing member 230 may be provided so as to cover only the side surface of the first sheet layer 121, as shown in Figure 2d.
  • the fine stripping and anti-oxidation member 130 may be formed as shown in FIGS. 1 and 2C. It may include a third portion 133 extending from the portion 132 to cover the top surface of the second sheet layer 122.
  • the third portion 133 extends from the second portion 132 covering the side surface of the first sheet layer 121 to the upper surface of the second sheet layer 122, thereby preventing fine stripping and oxidation.
  • the member 130 is provided in the form of a protective film, it is possible to increase the adhesive force of the protective film by increasing the adhesive area.
  • the fine flake stripping and oxidation preventing member 130 ′′ is formed as shown in FIG. 2B. It may extend from the second portion 132 to cover the side of the sheet layer 122.
  • the extended portion extending from the second portion 132 has a lower portion of the second sheet layer 122 so as to increase the adhesion of the fine flake stripping and oxidation preventing member 130 ′′ by increasing the adhesion area. It may extend to cover part of the face.
  • the buffer layer 136 when the buffer layer 136 is disposed on the side of the first sheet layer 121, the second portion 132 and the third portion 133 of the fine stripping and oxidation preventing member 130 may be formed on both surfaces thereof.
  • An adhesive 134 may be applied to fix the buffer layer 136 through the adhesive.
  • the fine stripping and oxidation preventing members 130, 130 'and 130 " are provided on the side and / or top surfaces of the first sheet layer 121 and / or the second sheet layer 122.
  • the present invention is not limited thereto, and it may be provided to cover only the side surfaces of the first sheet layer 121 and the second sheet layer 122 at the same time.
  • 130, 130 ′, 130 ′′, 230 may be applied to all exposed surfaces of the shield sheets 120, 120 ′ 120 ′′, 220 exposed to the outside in the process of applying the shield sheets 120, 120 ′ 120 ′′, 220 to the product. Put it.
  • both the first sheet layer 121 and the second sheet layer 122 are made of a magnetic material including a metal component
  • the fine stripping and oxidation preventing members 130, 130 ′, 130 ′′ may be exposed to the outside. It is preferable to arrange
  • a separate cover film 140 may be provided on a lower surface of the second sheet layer 122 in which the micro scrap detachment and oxidation preventing members 130, 130 ′, 130 ′′, and 230 are not disposed.
  • the wireless power transmission module 100 can be manufactured to a thickness of 0.15 ⁇ 0.6mm, and can also be used as a thickness of 0.3mm in accordance with the needs of light and thin shortening of electronic devices such as portable terminals. Put it.
  • the entire thickness of the wireless power transmission module 100 is illustrated as 0.15 ⁇ 0.6mm, it should be understood that the overall thickness of the wireless power transmission module has a thin thickness, the total thickness of the wireless power transmission module Note that it is not limiting.
  • the antenna unit 110 is shown to be attached to one surface of the second sheet layer 122 of the shielding sheet, but is not limited thereto, and may be attached to one surface of the first sheet layers 121 and 121 '. To reveal.
  • Such a wireless power transmission module 100 can be installed inside the rear case or the back cover 92 of the mobile terminal 90, as shown in Figure 6, It may be installed in a case that is combined separately.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

La présente invention concerne une feuille de blindage magnétique et un module de transfert d'énergie sans fil la comprenant. La feuille de blindage magnétique, selon un exemple de mode de réalisation de la présente invention, qui est appliquée à une unité d'antenne du type combiné qui comprend au moins deux antennes utilisant des bandes de fréquence de champs magnétiques différentes, comprend : une première couche de feuille qui comprend un composant métallique qui arrête une première bande de fréquence d'un champ magnétique et le concentre dans une direction prédéterminée; une seconde couche de feuille qui arrête une seconde bande de fréquence d'un champ magnétique et le concentre dans une direction prédéterminée; et un élément de prévention du détachement de micro-pièces et de l'oxydation disposé sur une surface latérale de la première couche de feuille de manière à empêcher qu'une micro-pièce se détache de la surface latérale de la première feuille ou à empêcher que la surface latérale s'oxyde. Selon la présente invention, en vertu de l'élément de prévention du détachement de micro-pièces et de l'oxydation disposé sur la surface latérale de la première couche de feuille, il est possible de prévenir une oxydation de la surface latérale et de prévenir un court-circuit dû à des particules.
PCT/KR2015/014391 2015-01-05 2015-12-29 Feuille de blindage magnétique et module de transfert d'énergie sans fil la comprenant WO2016111496A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580072256.6A CN107112811B (zh) 2015-01-05 2015-12-29 磁场屏蔽片及包括其的无线电力传输模块
US15/541,463 US10477743B2 (en) 2015-01-05 2015-12-29 Magnetic field shielding sheet and wireless power transmitting module including same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20150000572 2015-01-05
KR10-2015-0000572 2015-01-05
KR1020150042149A KR101656260B1 (ko) 2015-01-05 2015-03-26 무선충전용 차폐유닛 및 이를 포함하는 무선전력 충전모듈
KR10-2015-0042149 2015-03-26

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107134340A (zh) * 2017-07-05 2017-09-05 深圳市金核科技股份有限公司 一种带保护膜的隔磁片及制备方法
US10477743B2 (en) 2015-01-05 2019-11-12 Amosense Co., Ltd Magnetic field shielding sheet and wireless power transmitting module including same
CN111698898A (zh) * 2020-07-07 2020-09-22 宁波中科毕普拉斯新材料科技有限公司 一种宽幅复合电磁屏蔽材料及其制备方法

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US10477743B2 (en) 2015-01-05 2019-11-12 Amosense Co., Ltd Magnetic field shielding sheet and wireless power transmitting module including same
CN107134340A (zh) * 2017-07-05 2017-09-05 深圳市金核科技股份有限公司 一种带保护膜的隔磁片及制备方法
CN111698898A (zh) * 2020-07-07 2020-09-22 宁波中科毕普拉斯新材料科技有限公司 一种宽幅复合电磁屏蔽材料及其制备方法
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