WO2014057920A1 - 複合コイルモジュール、及び携帯機器 - Google Patents
複合コイルモジュール、及び携帯機器 Download PDFInfo
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- WO2014057920A1 WO2014057920A1 PCT/JP2013/077300 JP2013077300W WO2014057920A1 WO 2014057920 A1 WO2014057920 A1 WO 2014057920A1 JP 2013077300 W JP2013077300 W JP 2013077300W WO 2014057920 A1 WO2014057920 A1 WO 2014057920A1
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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
- 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
- H01F27/2871—Pancake coils
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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
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
- H01F2038/143—Inductive couplings for signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/04—Details of telephonic subscriber devices including near field communication means, e.g. RFID
Definitions
- the present invention relates to a composite coil module having a plurality of coil modules, and more particularly to a composite coil module in which another loop coil is arranged on the inner diameter of the loop coil, and a portable device using the same.
- Recent wireless communication devices are equipped with a plurality of RF antennas such as a telephone communication antenna, a GPS antenna, a wireless LAN / BLUETOOTH (registered trademark) antenna, and an RFID (Radio Frequency Identification).
- RF antennas such as a telephone communication antenna, a GPS antenna, a wireless LAN / BLUETOOTH (registered trademark) antenna, and an RFID (Radio Frequency Identification).
- loop coils for power transmission include an electromagnetic induction method, a radio wave reception method, and a magnetic resonance method. These both use electromagnetic induction and magnetic resonance between the primary and secondary coils.
- the Qi standard for non-contact charging and the NFC (Near Field Communication) standard for RFID use electromagnetic induction. is doing.
- the space allocated for mounting a plurality of antennas as described above on electronic devices such as portable terminal devices has become extremely small. Therefore, in order to mount the antenna coil for RFID and the charging coil for non-contact charging in the same space, there is a demand for downsizing and thinning of the antenna module, and also for the combination and integration of a plurality of coil modules. It is getting stronger.
- an RFID antenna module 101 and a non-contact charging module 102 are laminated and integrated.
- the antenna module 101 is a spiral coil antenna formed by spirally winding a magnetic flux concentrating magnetic sheet 103 made of a magnetic material (for example, MnZn-based ferrite) suitable for drawing a communication magnetic field.
- the magnetic sheet 103 has an antenna coil 104 formed in a spiral coil shape on one surface.
- the charging module 102 is also formed by spirally winding a conductive wire with a magnetic flux concentrating magnetic sheet 105 made of a magnetic material (for example, NiZn-based ferrite) suitable for drawing a magnetic field for charging.
- a charging coil 106 having a spiral coil shape.
- Charging coil 106 has an outer diameter that fits on the inner circumference side of antenna coil 104.
- the magnetic sheet 105 has a charging coil 106 formed in a spiral coil shape attached to one surface.
- the composite coil module 100 is integrated by superimposing the charging module 102 on the inner peripheral side of the antenna coil 104 of the antenna module 101.
- an antenna coil and a charging coil are formed on one flexible printed circuit board, and a composite coil module 110 in which one magnetic sheet is attached. Has also been proposed.
- the composite coil module 110 includes, on a flexible substrate, a spiral coil-shaped antenna coil 112 that constitutes the antenna module 111, and a spiral coil-shaped charging coil 114 that is provided on the inner peripheral side of the antenna coil 112 and constitutes the charging module 113. However, both are formed of Cu foil or the like.
- the composite coil module 110 includes a flexible substrate in which the antenna coil 112 and the charging coil 114 are formed on one surface of a magnetic flux concentrating magnetic sheet 116 made of a magnetic material suitable for drawing a magnetic field for communication or charging. It is pasted.
- the composite coil module 110 uses a magnetic material suitable for drawing a magnetic field for communication or charging as the magnetic sheet 116 as described above, for example, a magnetic material (for example, when MnZn-based ferrite) is used, the communication characteristics of RFID deteriorate.
- a magnetic material for example, when MnZn-based ferrite
- NiZn-based ferrite when an optimum magnetic material (for example, NiZn-based ferrite) is used for the RFID antenna module, the non-contact charging characteristics are deteriorated.
- the present invention provides a composite coil module that can be thinned and can be mounted in a narrow space without impairing each characteristic of the plurality of coil modules, and a portable device using the same. Objective.
- a composite coil module according to the present invention is provided on a first magnetic sheet formed of a first magnetic material and the first magnetic sheet, and is wound in a planar shape.
- a first coil module including the first loop coil formed; a second magnetic sheet formed of a second magnetic material different from the first magnetic sheet; and the second magnetic sheet.
- a second coil module provided with a second loop coil wound in a planar shape, and the first magnetic sheet is provided inside the first loop coil. And the second coil module is provided.
- the portable device is a portable device in which a composite coil module is mounted in a device casing, and the composite coil module includes the first magnetic sheet formed of a first magnetic material, and A first coil module provided on the first magnetic sheet and including a first loop coil wound in a planar shape, and a second magnetic material different from the first magnetic sheet is formed.
- a second coil module comprising: a second magnetic sheet; and a second coil coil provided on the second magnetic sheet and wound in a planar shape. The first loop coil The first magnetic sheet is not provided inside and the second coil module is provided.
- the first magnetic sheet is not provided on the first coil module in accordance with the inner peripheral side of the first loop coil, and the second coil module is provided. Therefore, according to the present invention, the overall thickness of the module can be reduced as compared with the case where the first coil module and the second coil module are overlapped.
- the present invention since the present invention includes the first and second magnetic sheets using the most suitable magnetic material for each of the first coil module and the second coil module, the module without losing the characteristics of each module. Thinning can be realized.
- FIG. 1A is a plan view showing an example of a composite coil module to which the present invention is applied
- FIG. 1B is a cross-sectional view.
- FIG. 2 is a diagram showing an outline of a radio communication system for RFID using an antenna module.
- FIG. 3 is a diagram showing an outline of a non-contact charging system using a non-contact charging module.
- FIG. 4 is a plan view showing an example of a composite coil module to which the present invention is applied.
- FIG. 5 is a plan view showing an example of a composite coil module to which the present invention is applied.
- FIG. 6 is a plan view showing an example of a composite coil module to which the present invention is applied.
- FIG. 7 is a plan view showing an example of a composite coil module to which the present invention is applied.
- FIG. 1A is a plan view showing an example of a composite coil module to which the present invention is applied
- FIG. 1B is a cross-sectional view.
- FIG. 2 is a diagram showing
- FIG. 8 is a plan view showing the composite coil module superimposed on the metal plate.
- FIG. 9 is a perspective view showing the magnetic field strength distribution on the metal plate.
- FIG. 10A is a plan view showing an example of a composite coil module to which the present invention is applied, and FIG. 10B is a cross-sectional view.
- FIG. 11A is a plan view showing an example of a composite coil module to which the present invention is applied, and FIG. 11B is a cross-sectional view.
- FIG. 12A is a plan view showing an example of a conventional composite coil module, and FIG. 12B is a cross-sectional view.
- FIG. 13A is a plan view showing an example of a conventional composite coil module, and FIG. 13B is a cross-sectional view.
- the composite coil module 1 to which the present invention is applied is incorporated in a portable electronic device, and realizes both a short-range wireless communication function and a non-contact charging function.
- the composite coil module 1 to which the present invention is applied includes an antenna module 2 serving as a first coil module and a second coil provided inside the antenna module 2 as shown in FIGS. 1A and 1B. It has the non-contact charge module 3 used as a module.
- the antenna module 2 is a module for RFID such as NFC, and is provided on the first magnetic sheet 4 in the form of a magnetic material and the first magnetic sheet 4 and wound in a planar shape. And a spiral coil antenna coil 5.
- the non-contact charging module 3 is a module for non-contact charging such as Qi, a sheet-like second magnetic sheet 6 formed of a magnetic material different from the first magnetic sheet 4, and a second magnetic sheet.
- a spiral coil-shaped non-contact charging coil 7 provided on the sheet 6 and wound in a planar shape is provided.
- the first magnetic sheet 4 is made of, for example, a sintered body of NiZn ferrite.
- the first magnetic sheet 4 is formed by forming a sheet by sintering ferrite particles previously applied in a thin sheet shape in a high-temperature environment, and then punching into a predetermined shape.
- the first magnetic sheet 4 can be formed by previously applying ferrite particles in the same shape as the final shape in a sheet shape and sintering.
- the first magnetic sheet 4 is filled with ferrite particles in a mold having a rectangular cross section, and the ferrite particles are sintered in a rectangular parallelepiped in plan view, and the sintered body is thinly sliced to obtain a predetermined shape. A shape can also be obtained.
- the first magnetic sheet 4 may include magnetic particles made of soft magnetic powder and a resin as a binder.
- the magnetic particles include oxide magnetic materials such as ferrite, Fe-based materials such as Sendust and Permalloy, Co-based materials, Ni-based materials, Fe-Ni-based materials, Fe-Co-based materials, Fe-Al-based materials, Fe-Si-based materials, and Fe--based materials.
- Crystal system such as Si-Al system, Fe-Ni-Si-Al system, microcrystalline system, Fe-Si-B system, Fe-Si-BC system, Co-Si-B system, Co- Amorphous metal magnetic particles such as Zr-based, Co-Nb-based, and Co-Ta-based particles can be used.
- NiZn-based ferrite is preferably used as the magnetic material for the first magnetic sheet 4 used in the RFID antenna module 2 such as NFC.
- a resin that is cured by heat, ultraviolet irradiation, or the like can be used.
- a resin such as an epoxy resin, a phenol resin, a melamine resin, a urea resin, an unsaturated polyester, or a known material such as silicone rubber, urethane rubber, acrylic rubber, butyl rubber, or ethylene propylene rubber can be used.
- the binder may add an appropriate amount of a surface treatment agent such as a flame retardant, a reaction modifier, a crosslinking agent, or a silane coupling agent to the above-described resin or rubber.
- the first magnetic sheet 4 is not limited to a single magnetic material, and two or more kinds of magnetic materials may be used in combination, or may be formed by laminating multiple layers. Good. Further, the first magnetic sheet 4 may be made of the same magnetic material, may be mixed by selecting a plurality of particle sizes and / or shapes of magnetic particles, or may be formed by laminating in multiple layers. .
- the antenna coil 5 is formed by forming a conductive pattern made of Cu foil or the like in a spiral coil shape on a flexible substrate 10 made of polyimide or the like.
- the first magnetic sheet 4 and the flexible substrate 10 of the antenna coil 5 have the same shape.
- the inner peripheral side of the antenna coil 5 of the flexible substrate 10 is opened, and the first magnetic sheet 4 is also opened on the inner peripheral side of the antenna coil 5, thereby forming the opening 2a.
- the antenna module 2 has a non-contact charging module 3 disposed in the opening 2a.
- the composite coil module 1 is incorporated, for example, inside a housing 61 of a mobile phone 60, and the antenna module 2 is used as a radio communication system 70 for RFID.
- the reader / writer 71 accesses the memory module 73 incorporated in the mobile phone 60 together with the antenna module 2.
- the antenna module 2 and the reader / writer 71 are disposed so as to face each other in the xy plane of the three-dimensional orthogonal coordinate system xyz.
- the reader / writer 71 functions as a transmitter that transmits a magnetic field in the z-axis direction to the antenna coils 5 of the antenna module 2 that face each other in the xy plane. Specifically, the reader / writer 71 transmits a magnetic field toward the antenna coil 5. And a control board 74 that communicates with the memory module 73.
- the reader / writer 71 is provided with a control board 74 that is electrically connected to the antenna 72.
- a control circuit made of electronic components such as one or a plurality of integrated circuit chips is mounted.
- the control circuit executes various processes based on data received from the memory module 73 via the antenna coil 5. For example, when transmitting data to the memory module 73, the control circuit encodes the data, modulates a carrier wave of a predetermined frequency (for example, 13.56 MHz) based on the encoded data, and modulates the modulation.
- the signal is amplified, and the antenna 72 is driven by the amplified modulation signal.
- the control circuit When reading data from the memory module 73, the control circuit amplifies the modulation signal of the data received by the antenna 72, demodulates the modulation signal of the amplified data, and decodes the demodulated data.
- a coding system and a modulation system used in a general reader / writer are used. For example, a Manchester coding system or an ASK (Amplitude Shift Keying) modulation system is used.
- the antenna coil 5 receives a magnetic field transmitted from the reader / writer 71 and inductively couples with the reader / writer 71, and supplies a signal to the memory module 73 that is a storage medium incorporated in the mobile phone 60.
- the antenna coil 5 When the antenna coil 5 receives a magnetic field transmitted from the reader / writer 71, the antenna coil 5 is magnetically coupled to the reader / writer 71 by inductive coupling, receives the modulated electromagnetic wave, and receives a received signal via the terminal portions 8a and 8b. This is supplied to the memory module 73.
- the memory module 73 is driven by a current flowing through the antenna coil 5 and communicates with the reader / writer 71. Specifically, the memory module 73 demodulates the received modulation signal, decodes the demodulated data, and writes the decoded data to the internal memory of the memory module 73. The memory module 73 reads out data to be transmitted to the reader / writer 71 from the internal memory, encodes the read data, modulates a carrier wave based on the encoded data, and is magnetically coupled by inductive coupling. 5 is transmitted to the reader / writer 71.
- Non-contact charging module 3 is provided on a sheet-like second magnetic sheet 6 formed of a magnetic material different from the first magnetic sheet 4 and the second magnetic sheet 6 and is wound in a planar shape.
- the second magnetic sheet 6 is formed in a size that fits inside the opening 2 a of the antenna coil module 2. Moreover, the 2nd magnetic sheet 6 consists of a sintered compact of the magnetic particle formed in the sheet form similarly to the 1st magnetic sheet 4 mentioned above, for example, can use MnZn type ferrite suitably. The second magnetic sheet 6 may be formed of NiZn ferrite. The second magnetic sheet 6 can be manufactured in the same manner as the first magnetic sheet 4.
- the second magnetic sheet 6 may be formed into a sheet shape including magnetic particles made of soft magnetic powder and a resin as a binder, like the first magnetic sheet 4.
- the second magnetic sheet 6 may be made of the above-described materials that can also be used for the first magnetic sheet 4 with magnetic particles and a binder.
- the second magnetic sheet 6 is not limited to the case of being composed of a single magnetic material, like the first magnetic sheet 4, and two or more kinds of magnetic materials may be mixed and used. Or you may form by laminating
- the second magnetic sheet 6 may be made of the same magnetic material, may be mixed by selecting a plurality of magnetic particle diameters and / or shapes, or may be formed by laminating in multiple layers. .
- the contactless charging coil 7 receives a magnetic field transmitted from the power transmission coil and inductively couples it with the power transmission coil, thereby supplying a charging current to the battery of the portable device in which the composite coil module 1 is incorporated.
- the non-contact charging coil 7 is made of a conducting wire wound in a spiral coil shape, for example.
- the lead wire constituting the non-contact charging coil 7 is a case where the non-contact charging module 3 is used as a secondary charging coil for non-contact charging having a charging output capacity of about 5 W, for example, and used at a frequency of about 120 kHz. It is preferable to use a single wire made of Cu or an alloy containing Cu as a main component in a 0.20 to 0.45 mm system. Alternatively, in order to reduce the skin effect, the conductive wire may be a parallel line or a knitted line obtained by bundling a plurality of fine wires thinner than the above-described single wire, or a single layer using a thin rectangular wire or flat wire. It is good also as a 2 layer alpha winding. Further, the non-contact charging coil 7 may use Cu foil or the like patterned on a substrate such as a flexible substrate according to the current capacity.
- the antenna module 2 and the non-contact charging module 3 are physically separated. Therefore, since the antenna coil 5 and the non-contact charging coil 7 are arranged via air having a low magnetic permeability (low magnetic resistance), the magnetic coupling is weakened. Further, an insulating material having a high magnetic resistance, for example, a sub-board such as epoxy or phenol, or a flexible board made of polyimide or the like may be interposed between the antenna module 2 and the non-contact charging module 3.
- a sub-board such as epoxy or phenol, or a flexible board made of polyimide or the like
- Non-contact charging system Next, the non-contact charging function by the non-contact charging coil 7 will be described.
- the non-contact charging coil 7 is used as, for example, a Qi standard non-contact charging system 80.
- the non-contact charging system 80 charges the battery pack 81 connected to the non-contact charging coil 7 of the non-contact charging module 3 with the charging device 82.
- the non-contact charging coil 7 of the non-contact charging module 3 and the power transmission coil 83 of the charging device 82 are similar to the positional relationship between the antenna coil 5 and the reader / writer 71 described above, and xy of the three-dimensional orthogonal coordinate system xyz. It is assumed that they are arranged so as to face each other on a plane.
- the charging device 82 functions as a power transmission unit that transmits a magnetic field in the z-axis direction to the non-contact charging coils 7 of the non-contact charging module 3 facing each other in the xy plane, and specifically, the non-contact charging coil 7. And a power transmission control board 84 that controls the supply of power to the non-contact charging coil 7 that is inductively coupled via the power transmission coil 83.
- the charging device 82 is provided with a power transmission control board 84 electrically connected to the power transmission coil 83.
- a control circuit made of electronic components such as one or a plurality of integrated circuit chips is mounted. This control circuit supplies a charging current to the non-contact charging coil 7 inductively coupled to the power transmission coil 83.
- the power transmission control board 84 drives the power transmission coil 83 with a power transmission current having a predetermined frequency, for example, a relatively low frequency of 110 kHz.
- the non-contact charging module 3 is incorporated in the housing 61 of the mobile phone 60, and the non-contact charging coil 7 receives the magnetic field transmitted from the power transmission coil 83 and inductively couples with the power transmission coil 83, The received current is supplied to the battery pack 81 incorporated in the mobile phone 60.
- the non-contact charging coil 7 When the non-contact charging coil 7 receives a magnetic field transmitted from the charging device 82, the non-contact charging coil 7 is magnetically coupled to the charging device 82 by inductive coupling, receives the modulated electromagnetic wave, and is charged via the terminal portions 9a and 9b. Current is supplied to the battery pack 81.
- the battery pack 81 applies a charging voltage corresponding to the charging current flowing through the non-contact charging coil 7 to the battery cell inside the battery pack 81.
- the antenna coil 5 that realizes a short-range wireless communication function and the non-contact charging coil 7 that realizes a non-contact charging function are formed. It is possible to realize both the short-range wireless communication function and the non-contact charging function while reducing the size of the housing 61 when incorporated in the telephone 60.
- the antenna module 2 is formed with the opening 2a where the first magnetic sheet 4 is not provided in accordance with the inner peripheral side of the antenna coil 5, and the opening 2a A contact charging module 3 is provided. Therefore, the composite coil module 1 can realize a reduction in the thickness of the entire module as compared with the case where the antenna module 2 and the non-contact charging module 3 are overlapped. Moreover, since the composite coil module 1 includes the first and second magnetic sheets 4 and 6 using the optimum magnetic material for each of the antenna module 2 and the non-contact charging module 3, the antenna characteristics and the charging characteristics are impaired. Therefore, the module can be thinned.
- the composite coil module 1 is formed by forming a notch 6a in the second magnetic sheet 6 for pulling out the inner peripheral end of the non-contact charging coil 7 outward. Also good. Thereby, the composite coil module 1 can draw the inner peripheral side end of the non-contact charging coil 7 in the same plane as the second magnetic sheet 6, and overlaps the upper part of the non-contact charging coil 7 outward. The thickness can be reduced as compared with the case of pulling out.
- the composite coil module 1 is provided with an open portion 4a that is opened across the inner and outer peripheral directions of the antenna coil 5 in the first magnetic sheet 4, and is contactlessly charged from the open portion 4a.
- the coil 7 may be pulled out outward. Thereby, the composite coil module 1 can be pulled out of the module without increasing the thickness by superimposing both end portions 7a and 7b of the non-contact charging coil 7 on the antenna module 2.
- the open part 4 a has a width that allows at least the conducting wire of the non-contact charging coil 7 to pass therethrough, and may be provided at one or a plurality of locations of the first magnetic sheet 4.
- the composite coil module 1 has an open portion 4a formed in the first magnetic sheet with a width equal to or larger than the width of the non-contact charging module 3, and the open portion 4a is also contactless charged.
- the second magnetic sheet 6 of the module 3 may be provided.
- the opening 4a may be provided on one side or a plurality of sides of the first magnetic sheet 4.
- the composite coil module 1 is composed of three independent magnetic sheets each constituting one side as shown in FIG. You may comprise, or as shown in FIG. 6, you may comprise the other 3 sides with an integral magnetic sheet.
- the composite coil module 1 has an opening 4 a formed between two opposing sides of the first magnetic sheet 4, so that the first magnetic sheet 4 is opened. You may isolate
- the composite coil module 1 can arrange
- the composite coil module 1 has the opening portion 4 a formed between two opposite sides of the first magnetic sheet 4, so that the first magnetic sheet 4 is While being separated into two by the opening portion 4a, at least one of the separated first magnetic sheets 4 is disposed along the side edge of the metal plate 30 in the portable device in which the composite coil module 1 is incorporated. It is preferable.
- the composite coil module 1 is provided in a portable device so as to overlap with a metal plate 30 such as a battery pack or a reinforcing plate of a device housing, and each separated first magnetic sheet 4 is made of the metal It is disposed along both side edges of the plate 30.
- a metal plate 30 such as a battery pack or a reinforcing plate of a device housing
- each separated first magnetic sheet 4 is made of the metal It is disposed along both side edges of the plate 30.
- the magnetic flux directed to the metal plate 30 flows toward both side edges by the plate surface of the metal plate 30, and therefore both side edge portions of the metal plate 30.
- High magnetic field strength In FIG. 9, the strong magnetic field region is indicated by A, the magnetic field region weaker than A is indicated by B, and the magnetic field region weaker than B is indicated by C. Therefore, the composite coil module 1 can efficiently draw more magnetic flux and improve the communication characteristics of the antenna module 2 by arranging the first magnetic sheet 4 in the strong magnetic field region A.
- the composite coil module 1 can arrange the second magnetic sheet 6 between the separated first magnetic sheets 4, thereby increasing the area of the second magnetic sheet 6,
- the charging efficiency of the non-contact charging module 3 can be further improved.
- both of the separated first magnetic sheets 4 are disposed along two opposing side edges of the metal plate 30 in the portable device in which the composite coil module 1 is incorporated.
- the communication characteristics of the antenna module 2 can be further improved.
- the non-contact charging coil 7 may be covered with a magnetic resin layer 40 as shown in FIGS. 10A and 10B.
- the magnetic resin layer 40 includes magnetic particles made of soft magnetic powder and a resin as a binder, like the first and second magnetic sheets 4 and 6 described above. Moreover, as shown in FIG. 10A and FIG. 10B, the magnetic resin layer 40 may be formed of magnetic particles and a binder different from the second magnetic sheet 6 of the non-contact charging module 3. Alternatively, as shown in FIG. 11A and FIG. 11B, the magnetic resin layer 40 has a resin composition containing the magnetic particles constituting the second magnetic sheet 6 and the non-contact charging coil 7 when the second magnetic sheet 6 is formed. By embedding in a thing, you may form with the same magnetic particle and binder as the 2nd magnetic sheet 6. FIG.
- the magnetic particles are oxide magnetic materials such as ferrite, Fe-based, Co-based, Ni-based, Fe-Ni-based, Fe-Co-based, Fe-Al-based, Fe-Si-based, Fe-Si-Al-based, Fe- Ni-Si-Al-based crystal system, microcrystalline magnetic material, or Fe-Si-B system, Fe-Si-BC system, Co-Si-B system, Co-Zr system, Co-Nb system Co—Ta-based amorphous metal magnetic particles can be used.
- oxide magnetic materials such as ferrite, Fe-based, Co-based, Ni-based, Fe-Ni-based, Fe-Co-based, Fe-Al-based, Fe-Si-based, Fe-Si-Al-based, Fe- Ni-Si-Al-based crystal system, microcrystalline magnetic material, or Fe-Si-B system, Fe-Si-BC system, Co-Si-B system, Co-Zr system, Co-Nb system Co—Ta-
- the magnetic particles spherical or flat powder having a particle size of several ⁇ m to several tens of ⁇ m can be used, but crushed powder may be mixed.
- the complex permeability has frequency characteristics, and loss occurs due to the skin effect when the operating frequency becomes high, so the particle size and shape are adjusted according to the frequency band to be used. It is preferable.
- the inductance value of the composite coil module 1 is determined by the real part magnetic permeability (hereinafter simply referred to as magnetic permeability) of the magnetic material, and the magnetic permeability can be adjusted by the mixing ratio of the magnetic particles and the resin. it can.
- the volume filling rate of 40 vol% or more at which the interaction between the particles increases. It is preferable that The magnetic resin layer 40 also has improved thermal conductivity as the filling rate of magnetic particles increases.
- the magnetic resin layer 40 is not limited to a single magnetic material, and two or more kinds of magnetic materials may be used in combination, or may be formed by being laminated in multiple layers.
- the magnetic resin layer 40 may be made of the same magnetic material, may be selected and mixed with a plurality of particle sizes and / or shapes of magnetic particles, or may be formed by being laminated in multiple layers.
- a resin that is cured by heat, ultraviolet irradiation, or the like can be used.
- a resin such as an epoxy resin, a phenol resin, a melamine resin, a urea resin, an unsaturated polyester, or a known material such as silicone rubber, urethane rubber, acrylic rubber, butyl rubber, or ethylene propylene rubber can be used.
- the binder may add an appropriate amount of a surface treatment agent such as a flame retardant, a reaction modifier, a crosslinking agent, or a silane coupling agent to the above-described resin or rubber.
- 1 composite coil module 1 composite coil module, 2 antenna module, 2a opening, 3 non-contact charging module, 4 first magnetic sheet, 4a opening, 5 antenna coil, 6 second magnetic sheet, 7 non-contact charging coil, 10 flexible substrate 20 conductors, 30 metal plates, 40 magnetic resin layers, 60 mobile phones, 61 housings, 70 wireless communication systems, 71 reader / writers, 72 antennas, 73 memory modules, 74 control boards, 80 contactless charging systems, 81 battery packs , 82 charging device, 83 power transmission coil, 84 power transmission control board
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
Description
第1の磁性シート4は、例えば、NiZn系フェライトの焼結体からなる。第1の磁性シート4は、予め薄くシート状に塗布したフェライト粒子を高温環境下で焼結させることによりシート化し、その後、所定の形状に型抜きすることにより形成される。あるいは、第1の磁性シート4は、予め最終形状と同形状にフェライト粒子をシート状に塗布し、焼結することにより形成することもできる。その他、第1の磁性シート4は、長方形断面を持った型に、フェライト粒子を詰め込み、平面視矩形状の直方体にフェライト粒子を焼結し、この焼結体を薄くスライスすることにより、所定の形状を得ることもできる。
次に、アンテナモジュール2による近距離無線通信機能について説明する。例えば図2に示すように、複合コイルモジュール1は、例えば携帯電話機60の筐体61内部に組み込まれ、アンテナモジュール2は、RFID用の無線通信システム70として使用される。
非接触充電モジュール3は、第1の磁性シート4と異なる磁性材料により形成されたシート状の第2の磁性シート6と、第2の磁性シート6上に設けられ、面状に巻回されたスパイラルコイル状の非接触充電コイル7とを備える。
次に、非接触充電コイル7による非接触充電機能について説明する。例えば図3に示すように、非接触充電コイル7は、例えばQi規格の非接触充電システム80として使用される。
また、複合コイルモジュール1は、図1に示すように、第1の磁性シート4に、アンテナコイル5の内外周方向に亘って開放された開放部4aを設け、当該開放部4aより非接触充電コイル7を外方に引き出すようにしてもよい。これにより、複合コイルモジュール1は、非接触充電コイル7の両端部7a,7bをアンテナモジュール2に重畳させることで厚みを増すこともなく、モジュールの外方に引き出すことができる。
なお、非接触充電モジュール3は、図10A及ぶ図10Bに示すように、非接触充電コイル7が磁性樹脂層40によって被覆されるようにしてもよい。
Claims (10)
- 第1の磁性材料により形成された第1の磁性シートと、上記第1の磁性シート上に設けられ、面状に巻回された第1のループコイルとを備えた第1のコイルモジュールと、
上記第1の磁性シートと異なる第2の磁性材料により形成された第2の磁性シートと、上記第2の磁性シート上に設けられ、面状に巻回された第2のループコイルとを備えた第2のコイルモジュールとを有し、
上記第1のループコイルの内側には、上記第1の磁性シートが設けられておらず、かつ上記第2のコイルモジュールが設けられている複合コイルモジュール。 - 上記第1の磁性シートは、上記第1のループコイルの内外周方向に亘って開放され、上記第2のループコイルを外方に引き出す開放部が形成されている請求項1記載の複合コイルモジュール。
- 上記第1の磁性シートは、上記第1のループコイルの内外周方向に、上記第2のコイルモジュールの幅以上の幅で開放され、該開放部にも上記第2のコイルモジュールが設けられている請求項1記載の複合コイルモジュール。
- 上記開放部が上記第1の磁性シートの相対向する2辺間に亘って形成され、上記第1の磁性シートが該開放部によって2つに分離されている請求項3記載の複合コイルモジュール。
- 上記第1のコイルモジュールは、非接触通信用のコイルモジュールであり、
上記第2のコイルモジュールは、非接触充電用のコイルモジュールである請求項1~4のいずれか1項に記載の複合コイルモジュール。 - 上記第2のコイルモジュールは、上記第2のループコイルが磁性材料を含有する磁性樹脂層によって被覆されている請求項1記載の複合コイルモジュール。
- 上記第2のコイルモジュールは、上記第2のループコイルが磁性材料を含有する磁性樹脂層によって被覆されている請求項5記載の複合コイルモジュール。
- 機器筐体内に複合コイルモジュールが搭載された携帯機器であって、
上記複合コイルモジュールは、
第1の磁性材料により形成された第1の磁性シートと、上記第1の磁性シート上に設けられ、面状に巻回された第1のループコイルとを備えた第1のコイルモジュールと、
上記第1の磁性シートと異なる第2の磁性材料により形成された第2の磁性シートと、上記第2の磁性シート上に設けられ、面状に巻回された第2のループコイルとを備えた第2のコイルモジュールとを有し、
上記第1のループコイルの内側には、上記第1の磁性シートが設けられておらず、かつ上記第2のコイルモジュールが設けられている携帯機器。 - 上記複合コイルモジュールは、電子機器筐体に設けられた金属部材に重畳して配置され、
略矩形状に形成された上記第1のコイルモジュールは、すくなくとも1辺が、上記金属部材の一側縁部の近傍に位置される請求項8記載の携帯機器。 - 上記第1のコイルモジュールの相対向する2辺が、上記金属部材の相対向する2側縁部の近傍に位置される請求項9記載の携帯機器。
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CN201380053034.0A CN104704676A (zh) | 2012-10-10 | 2013-10-08 | 复合线圈模块及便携设备 |
US14/428,556 US20150279554A1 (en) | 2012-10-10 | 2013-10-08 | Composite coil module, and portable apparatus |
KR1020157010118A KR20150068400A (ko) | 2012-10-10 | 2013-10-08 | 복합 코일 모듈 및 휴대 기기 |
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