WO2012039245A1 - Coil module for contactless electric power transfer, and battery pack and charging device provided with same - Google Patents

Coil module for contactless electric power transfer, and battery pack and charging device provided with same Download PDF

Info

Publication number
WO2012039245A1
WO2012039245A1 PCT/JP2011/069581 JP2011069581W WO2012039245A1 WO 2012039245 A1 WO2012039245 A1 WO 2012039245A1 JP 2011069581 W JP2011069581 W JP 2011069581W WO 2012039245 A1 WO2012039245 A1 WO 2012039245A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
coil module
module
magnetic sheet
protrusion
Prior art date
Application number
PCT/JP2011/069581
Other languages
French (fr)
Japanese (ja)
Inventor
恭平 加田
山下　幹弘
鈴木　一敬
宇宙 松元
Original Assignee
パナソニック株式会社
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
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2012039245A1 publication Critical patent/WO2012039245A1/en

Links

Images

Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Definitions

  • the present invention includes a first coil wound in a planar shape and a magnetic sheet on which the first coil is disposed, and the first coil and a second coil disposed to face the first coil.
  • the present invention relates to a coil module for non-contact power transmission that transmits power by electromagnetic induction between and a battery pack and a charging device including the coil module.
  • a coil module for non-contact power transmission that performs power transmission without using a connection terminal is known.
  • Such a coil module performs power transmission by the action of electromagnetic induction generated between two coils arranged opposite to each other.
  • both the coil modules 100 and 200 are arranged to face each other in the vertical direction in FIG. 7, and the side from the coil module 200 toward the coil module 100 is referred to as “upper side”, and the coil module 100 toward the coil module 200. Let the side be “lower”.
  • the coil module 100 includes a magnetic sheet 110 and a planar first coil 120 provided on the lower surface 111 of the sheet 110.
  • the coil module 200 includes a magnetic sheet 210 and a planar second coil 220 provided on the upper surface 211 of the sheet 210.
  • the present invention has been made in view of such a situation, and the purpose thereof is a coil module for non-contact power transmission capable of reducing the amount of leakage magnetic flux between coils arranged facing each other, Another object of the present invention is to provide a battery pack and a charging device including the same.
  • the first aspect of the present invention is a coil module for non-contact power transmission.
  • the coil module includes a first coil wound in a planar shape and a magnetic sheet on which the first coil is disposed, and a second coil disposed opposite to the first coil. Electric power is transmitted to and from the coil by electromagnetic induction.
  • the magnetic sheet includes a protrusion that protrudes toward the second coil at the center of the first coil and at least one outside the first coil. According to this configuration, the amount of leakage magnetic flux between the first and second coils arranged to face each other is reduced.
  • a second aspect of the present invention is a battery pack that includes the above-described coil module for non-contact power transmission and a secondary battery that is charged by an induced electromotive force generated in a first coil of the coil module. .
  • a third aspect of the present invention is a charging device including the coil module for non-contact power transmission and a circuit board that supplies an alternating current to the first coil of the coil module.
  • Sectional drawing which shows the cross-section of the mobile telephone provided with the battery pack which incorporated the coil module for non-contact-type electric power transmission concerning 1st Embodiment of this invention, and a charging device.
  • the disassembled perspective view which shows the structure of the coil module of FIG. 1 incorporated in the battery pack.
  • FIG. 2 is a cross-sectional structure diagram showing a magnetic flux formed between the coil module of FIG. 1 built in the battery pack and the coil module disposed in the charging device facing the coil module.
  • Sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission concerning 2nd Embodiment of this invention.
  • (A) And (b) is sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission concerning other embodiment of this invention.
  • (A) And (b) is sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission concerning other embodiment of this invention. Sectional drawing which shows the cross-section of the conventional coil module for non-contact-type electric power transmission, and the coil module facing this. Sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission of a comparative example.
  • FIG. 1 shows each cross-sectional structure of the mobile phone 1 in which the battery pack 33 is built in and the charging device 2 for charging the secondary battery 36 of the battery pack 33.
  • FIG. 1 shows a state where the mobile phone 1 is placed on the upper side of the charging device 2 in order to charge the mobile phone 1.
  • the mobile phone 1 includes a housing 30 made of a non-magnetic material such as a resin material.
  • the housing 30 is provided with a display unit 31 for displaying various information and an operation unit 32 for operating the mobile phone 1.
  • a battery pack 33 serving as a power source for the mobile phone 1 is detachably housed in the housing 30.
  • the battery pack 33 includes a coil module 35, a secondary battery 36 electrically connected to the coil module 35, and a case 34 for storing these.
  • the charging device 2 includes a housing 10 made of a non-magnetic material such as a resin material, and the housing 10 is provided with a coil module 11 and a circuit board 12.
  • the coil module 11 is referred to as a primary coil module 11
  • the coil module 35 is referred to as a secondary coil module 35.
  • the primary side coil module 11 or the secondary side coil module 35 corresponds to a “coil module for non-contact power transmission”.
  • the primary coil module 11 of the charging device 2 and the secondary coil module 35 of the mobile phone 1 face each other in close proximity.
  • an alternating current having a predetermined frequency is supplied from the circuit board 12 to the primary coil module 11, an alternating magnetic flux is generated in the primary coil module 11. Due to this alternating magnetic flux, an induced electromotive force having the same frequency as the above-mentioned frequency is generated in the secondary coil module 35.
  • the alternating current generated by the induced electromotive force is rectified into a direct current, and the direct current is supplied to the secondary battery 36, whereby the secondary battery 36 is charged. Then, based on the secondary battery 36 being fully charged, the charging apparatus 2 stops charging the mobile phone 1.
  • the configuration of the secondary coil module 35 will be described with reference to FIGS.
  • the secondary coil module 35 includes a planar first coil 41 and a magnetic sheet 40 on which the first coil 41 is disposed.
  • the magnetic sheet 40 is formed by sintering soft magnetic ferrite powder.
  • the first coil 41 is formed by winding a conductive wire in an annular shape. In the center of the first coil 41, an air core portion 45 which is a hollow space is provided.
  • the magnetic sheet 40 on which the first coil 41 is disposed includes a flat portion 42 formed in an annular shape in plan view.
  • a cylindrical outer protrusion 44 is provided on the outer peripheral edge of the flat portion 42 so as to protrude upward from the flat portion 42, that is, toward the primary coil module 11 (see FIG. 1).
  • the inner projecting portion 43 and the outer projecting portion 44 project perpendicularly to the plane portion 42.
  • the inner protrusion 43 is formed with a recess 47 that opens upward and is recessed downward in the cross-sectional shape. It should be noted that the thickness T1 of the flat portion 42 and the thickness T2 of the inner protrusion 43 are equal to each other.
  • the outer protrusion 44 is provided with an annular extension 46 extending outward from the lower end thereof. The thickness T3 of the outer protrusion 44 and the thickness T1 of the flat surface 42 are equal to each other.
  • the inner protrusion 43 is inserted through the air core 45.
  • the outer peripheral surface of the inner protrusion 43 and the inner periphery of the air core 45 are close to each other.
  • the inner peripheral surface of the outer protrusion 44 and the outer peripheral edge of the first coil 41 are close to each other. That is, the inner peripheral surface of the outer protrusion 44 and the outer periphery of the first coil 41 are in contact with each other, or the outer protrusion via a slight gap due to a dimensional error of the outer protrusion 44 and the first coil 41 or the like.
  • the inner peripheral surface of the portion 44 and the outer peripheral edge of the first coil 41 are adjacent to each other.
  • the primary coil module 11 is formed by sintering soft magnetic ferrite powder in the same manner as the secondary coil module 35.
  • the primary coil module 11 includes a magnetic sheet 50 and a planar second coil 51 attached to the magnetic sheet 50. Since the magnetic sheet 50 and the second coil 51 are substantially the same in configuration as the magnetic sheet 40 and the first coil 41, the corresponding parts are denoted by reference numerals in the 50s and the description thereof is omitted. . As shown in FIG. 3, the outer dimension of the inner protrusion 43 of the magnetic sheet 40 is larger than the outer dimension of the inner protrusion 53 of the magnetic sheet 50.
  • a magnetic circuit formed between the primary coil module 11 and the secondary coil module 35 will be described.
  • the second coil 51 moves from the inner peripheral side of the first coil 41 toward the inner peripheral side of the first coil 41, and the second coil from the outer peripheral side of the first coil 41 through the magnetic sheet 40.
  • a magnetic path is formed which faces the outer peripheral side of 51 and returns to the inner peripheral side of the second coil 51 via the magnetic sheet 50.
  • a magnetic circuit having a magnetic flux flow opposite to that of the magnetic circuit is formed.
  • the above-mentioned magnetic circuit and the magnetic flux opposite to this magnetic circuit is formed alternately.
  • the magnetic flux generated in the second coil 51 passes through the inner protrusion 53 and toward the inner protrusion 43.
  • the magnetic flux toward the air core portion 55 of the second coil 51 is directed toward the secondary coil module 35 by passing through the inner protrusion portion 53.
  • the magnetic flux emitted from the inner protrusion 53 is directed toward the inner protrusion 43.
  • the magnetic flux of the primary coil module 11 reaches the secondary coil module 35
  • the magnetic flux passes through the flat portion 42 via the inner protrusion 43, and then passes from the outer protrusion 44 to the second coil. Head to 51.
  • the outer protruding portion 44 reduces the amount of leakage magnetic flux that flows outside the secondary coil module 35.
  • the magnetic flux which goes to the 2nd coil 51 from the outer side projection part 44 goes to the outer side projection part 54 of the magnetic sheet 50, the quantity of the leakage magnetic flux which flows outside both the coil modules 11 and 35 decreases.
  • the magnetic sheet 40 when the magnetic flux is directed from the secondary coil module 35 to the primary coil module 11, the magnetic sheet 40 is directed toward the air core 45 of the first coil 41.
  • the flowing magnetic flux flows from the inner protrusion 43 toward the primary coil module 11. Therefore, the amount of leakage magnetic flux between the two coil modules 11 and 35 can be reduced.
  • the primary coil module 11 is similarly provided with an inner protrusion 53 and an outer protrusion 54. Therefore, the magnetic flux between the coil modules 11 and 35 flows between the inner protrusions 43 and 53 and between the outer protrusions 44 and 54, respectively. Therefore, the amount of leakage magnetic flux between both the coil modules 11 and 35 can be further reduced.
  • the air core coil 310 is attached to the magnetic sheet 300 formed into a flat plate shape, and the portion 320 outside the air core coil 310 of the magnetic sheet 300. It is conceivable to bend and attach to the case 34. According to such a configuration, the amount of leakage magnetic flux can be reduced as compared with the configuration shown in FIG.
  • the portion 320 is inclined outward in the radial direction toward the upper side, when the magnetic flux from the portion 320 flows toward the primary coil module 11 (see FIG. 3), the magnetic flux is along the portion 320. The magnetic flux may flow and spread outward. As a result, the effect of reducing the leakage magnetic flux flowing outside the coil modules 11 and 35 is reduced. Note that the same problem occurs even when the configuration of FIG. 8 is applied to the primary coil module 11.
  • the magnetic flux flowing from the outer protrusion 44 is lower than the configuration shown in FIG. (See Fig. 3). For this reason, the amount of leakage magnetic flux between the two coil modules 11 and 35 can be reduced as compared with the configuration shown in FIG.
  • the secondary coil module 35 is built in the battery pack 33. Therefore, the charging efficiency of the secondary battery 36 of the battery pack 33 by the charging device 2 can be improved.
  • the outer protrusion 44 is provided with an extension 46. Therefore, when the magnetic flux flows from the primary side coil module 11 toward the secondary side coil module 35 as compared with the outer side protruding part in which the extension part 46 is omitted, it flows from the outer side protruding part 54 toward the outer side protruding part 44. The area receiving the magnetic flux increases. For this reason, the amount of leakage magnetic flux between the two coil modules 11 and 35 can be further reduced. Further, when the magnetic flux flows from the secondary coil module 35 toward the primary coil module 11, an effect similar to the effect produced by the extension 46 of the outer projection 44 is obtained by the extension 56 of the outer projection 54. .
  • the thickness T1 of the planar portion 42 of the magnetic sheet 40, the thickness T2 of the inner protrusion 43, and the thickness T3 of the outer protrusion 44 are formed to be equal to each other.
  • a magnetic sheet 60 is used instead of the magnetic sheet 40.
  • the magnetic sheet 60 is formed so that the thickness of each part of the sheet 60 is different. The configuration described below can also be applied to the primary coil module 11.
  • the magnetic sheet 60 includes a flat surface portion 62 in which the air-core coil 61 is disposed and formed in an annular shape in plan view.
  • An inner protrusion 63 having a cylindrical outer shape extending from the flat portion 62 toward the opening is provided on the inner peripheral edge of the flat portion 62.
  • a cylindrical outer protrusion 64 is provided on the outer peripheral edge of the flat portion 62 and extends from the flat portion 62 toward the opening.
  • the inner protrusion 63 has a protruding shape that protrudes from the bottom surface 66 of the magnetic sheet 60 in the cross-sectional shape.
  • the inner protrusion 63 is not formed with a recess like the inner protrusion 43 of the first embodiment.
  • the inner projecting portion 63 is formed so that the portion corresponding to the air core portion 65 of the air core coil 61 is directed to the opening side and the thickness is increased more than the flat surface portion 62. Therefore, the thickness H1 of the inner protrusion 63 is thicker than the thickness T1 of the flat portion 62. Further, the thickness H3 of the inner protrusion 63 is thicker than the thickness T1 of the flat portion 62.
  • the outer protruding portion 64 has a protruding shape that protrudes from the bottom surface 66 of the magnetic sheet 60 toward the opening in the cross-sectional shape. That is, the outer protrusion 64 is formed so that the outer peripheral edge of the flat portion 62 is thicker than the portion of the flat portion 62 where the air-core coil 61 is disposed. Therefore, the thickness H2 of the outer protrusion 64 is thicker than the thickness T1 of the flat portion 62. Further, the thickness H4 of the outer protrusion 64 is thicker than the thickness T1 of the flat portion 62.
  • the inner protrusion 63 is formed by locally increasing the thickness of the magnetic sheet 60. For this reason, the amount of magnetic flux flowing from the air core coil 61 toward the air core portion 65 can be increased by the inner protrusion portion 63 as compared with the inner protrusion portion 43 of the first embodiment. For this reason, the amount of leakage magnetic flux between the coil modules 11 and 35 can be further reduced.
  • the outer protrusion 64 is formed by locally increasing the thickness of the magnetic sheet 60. For this reason, compared with the structure in which the recessed part like the inner side projection part 43 is provided, the magnetic flux amount which flows into the outer side projection part 64 can be increased. For this reason, the amount of leakage magnetic flux between the coil modules 11 and 35 can be further reduced.
  • the outer side protrusion part 44 can also be abbreviate
  • the flat portion 42 extends outward from the outer peripheral edge of the first coil 41 in the radial direction of the first coil 41.
  • the inner protrusion 43 can be omitted from the magnetic sheet 40.
  • an effect according to the effect (1) of the first embodiment can be obtained.
  • the configurations shown in FIGS. 5A and 5B can also be applied to the primary coil module 11.
  • the primary coil module 11 having both the protrusions 53 and 54 is referred to as a “first primary coil module”, and the one having only the inner protrusion 53 is referred to as a “second primary coil module”.
  • the one having only the outer projection 54 is referred to as a “third primary coil module”.
  • the secondary coil module 35 having both protrusions 43 and 44 is referred to as a “first secondary coil module”, and the one having only the inner protrusion 43 is referred to as a “second secondary coil module”.
  • a module having only the outer projection 44 is referred to as a “third secondary coil module”.
  • the outer protrusion 64 can be omitted from the magnetic sheet 60 as shown in FIG. In this case, it is preferable that the planar portion 62 extends outward from the outer peripheral edge of the first coil 61 in the radial direction of the first coil 61.
  • the amount of magnetic flux leakage to the outside in the radial direction of the first coil 61 can be reduced as compared with the coil modules 100 and 200 shown in FIG. Further, as shown in FIG. 6B, the inner protrusion 63 can be omitted from the magnetic sheet 60. Also in the configuration shown in FIGS. 6A and 6B, the effect according to the effect (1) of the first embodiment can be obtained.
  • the configurations shown in FIGS. 6A and 6B can also be applied to the primary coil module 11.
  • the outer protrusions 44, 54, 64 may be shaped to incline outward in the radial direction from the flat portions 42, 52, 62 toward the opening side. Even in this case, the effect (1) of the first embodiment can be achieved.
  • the magnetic sheets 40, 50, 60 are formed by sintering ferrite powder having soft magnetism, but the forming method of the magnetic sheets 40-60 is not limited thereto.
  • the ferrite powder can be formed into a sheet by using a polymer material such as rubber as a binding material.
  • the material forming the magnetic sheets 40 to 60 is not limited to ferrite powder, and may be other soft magnetic materials such as silicon steel plate, permalloy, iron and the like.
  • information indicating the charging state of the secondary battery 36 between the charging device 2 and the mobile phone 1 by the electromagnetic induction between the primary coil module 11 and the secondary coil module 35 is an electric signal. Can also be sent and received.
  • input / output of power for charging the secondary battery 36 as in each of the above embodiments is omitted by electromagnetic induction between the coil module for non-contact power transmission and the coil module facing the coil module. Thus, only the transmission and reception of the electric signal can be performed.

Abstract

A coil module (35) for contactless electric power transfer is provided with a first coil (41) which is wound in a plane and a magnetic sheet (40) on which the first coil is disposed. The coil module (35) transfers, by means of electromagnetic induction, electric power between the first coil and a second coil (51) which is disposed so as to face the first coil. The magnetic sheet (40) includes protrusions (43, 44) protruding toward the second coil (51) and located either at the center of the first coil (41) and/or outside the first coil (41).

Description

非接触式電力伝送用のコイルモジュール、およびこれを具備する電池パックおよび充電装置Non-contact power transmission coil module, and battery pack and charging device including the same
　本発明は、平面状に巻回された第１のコイルと、この第１のコイルが配設される磁性シートとを備え、第１のコイルとこれに対向して配置される第２のコイルとの間で電磁誘導による電力の伝送を行う非接触式電力伝送用のコイルモジュール、およびこれを具備する電池パックおよび充電装置に関する。 The present invention includes a first coil wound in a planar shape and a magnetic sheet on which the first coil is disposed, and the first coil and a second coil disposed to face the first coil. The present invention relates to a coil module for non-contact power transmission that transmits power by electromagnetic induction between and a battery pack and a charging device including the coil module.
　例えば特許文献１に記載されるように、接続端子を用いずに電力伝送を行う非接触式電力伝送用のコイルモジュールが知られている。このようなコイルモジュールは、互いに対向して配置される２つのコイル間に生じる電磁誘導の作用により電力伝送を行う。 For example, as described in Patent Document 1, a coil module for non-contact power transmission that performs power transmission without using a connection terminal is known. Such a coil module performs power transmission by the action of electromagnetic induction generated between two coils arranged opposite to each other.
　図７を参照して、従来の非接触式電力伝送用のコイルモジュール１００およびこのコイルモジュール１００に対向して配置されるコイルモジュール２００の構成について説明する。以下では、図７中の上下方向に両コイルモジュール１００，２００が対向して配置されるとともに、コイルモジュール２００からコイルモジュール１００に向かう側を「上側」とし、コイルモジュール１００からコイルモジュール２００に向かう側を「下側」とする。 With reference to FIG. 7, the structure of the conventional coil module 100 for non-contact-type electric power transmission and the coil module 200 arrange | positioned facing this coil module 100 are demonstrated. In the following, both the coil modules 100 and 200 are arranged to face each other in the vertical direction in FIG. 7, and the side from the coil module 200 toward the coil module 100 is referred to as “upper side”, and the coil module 100 toward the coil module 200. Let the side be “lower”.
　コイルモジュール１００は、磁性シート１１０と、同シート１１０の下面１１１に設けられた平面状の第１のコイル１２０とにより構成されている。また、コイルモジュール２００は、磁性シート２１０と、同シート２１０の上面２１１に設けられた平面状の第２のコイル２２０とにより構成されている。 The coil module 100 includes a magnetic sheet 110 and a planar first coil 120 provided on the lower surface 111 of the sheet 110. The coil module 200 includes a magnetic sheet 210 and a planar second coil 220 provided on the upper surface 211 of the sheet 210.
特開２００９－２７０２５号公報JP 2009-27025 A
　ところで、上記の両コイルモジュール１００，２００では、図７の一点鎖線の矢印に示すように、各コイル１２０，２２０の中心を通過することなく外部に漏洩する漏れ磁束の量が多くなる。このため、こうした漏れ磁束の存在により電力の伝送効率を向上させるうえでなお改善の余地を残すものとなっていた。 Incidentally, in both the coil modules 100 and 200 described above, the amount of leakage magnetic flux that leaks to the outside without passing through the centers of the coils 120 and 220 increases as shown by the dashed-dotted arrows in FIG. For this reason, the presence of such leakage magnetic flux still leaves room for improvement in improving the power transmission efficiency.
　本発明はこのような実情に鑑みてなされたものであり、その目的は、互いに対向して配置されるコイル間の漏れ磁束の量を少なくすることのできる非接触式電力伝送用のコイルモジュール、およびこれを具備する電池パックおよび充電装置を提供することにある。 The present invention has been made in view of such a situation, and the purpose thereof is a coil module for non-contact power transmission capable of reducing the amount of leakage magnetic flux between coils arranged facing each other, Another object of the present invention is to provide a battery pack and a charging device including the same.
　本発明の第一の態様は、非接触式電力伝送用のコイルモジュールである。該コイルモジュールは、平面状に巻回された第１のコイルと、この第１のコイルが配設される磁性シートとを備え、第１のコイルとこれに対向して配置される第２のコイルとの間で電磁誘導による電力の伝送を行う。磁性シートは、第１のコイルの中央および第１のコイルよりも外側の少なくとも一方において、第２のコイルに向けて突出する突起部を含む。この構成によれば、互いに対向して配置される第１及び第２コイル間の漏れ磁束の量が低減される。 The first aspect of the present invention is a coil module for non-contact power transmission. The coil module includes a first coil wound in a planar shape and a magnetic sheet on which the first coil is disposed, and a second coil disposed opposite to the first coil. Electric power is transmitted to and from the coil by electromagnetic induction. The magnetic sheet includes a protrusion that protrudes toward the second coil at the center of the first coil and at least one outside the first coil. According to this configuration, the amount of leakage magnetic flux between the first and second coils arranged to face each other is reduced.
　本発明の第二の態様は、上記の非接触式電力伝送用のコイルモジュールと、同コイルモジュールの第１のコイルに発生する誘導起電力により充電される二次電池とを含む電池パックである。 A second aspect of the present invention is a battery pack that includes the above-described coil module for non-contact power transmission and a secondary battery that is charged by an induced electromotive force generated in a first coil of the coil module. .
　本発明の第三の態様は、上記の非接触式電力伝送用のコイルモジュールと、同コイルモジュールの第１のコイルに交流電流を供給する回路基板とを含む充電装置である。 A third aspect of the present invention is a charging device including the coil module for non-contact power transmission and a circuit board that supplies an alternating current to the first coil of the coil module.
本発明の第１実施形態にかかる非接触式電力伝送用のコイルモジュールを内蔵した電池パックを備えた携帯電話および充電装置の断面構造を示す断面図。Sectional drawing which shows the cross-section of the mobile telephone provided with the battery pack which incorporated the coil module for non-contact-type electric power transmission concerning 1st Embodiment of this invention, and a charging device. 電池パックに内蔵された図１のコイルモジュールの構造を示す分解斜視図。The disassembled perspective view which shows the structure of the coil module of FIG. 1 incorporated in the battery pack. 電池パックに内蔵された図１のコイルモジュールとこれに対向して充電装置内に配置されるコイルモジュールとの間に形成される磁束を示す断面構造図。FIG. 2 is a cross-sectional structure diagram showing a magnetic flux formed between the coil module of FIG. 1 built in the battery pack and the coil module disposed in the charging device facing the coil module. 本発明の第２実施形態にかかる非接触式電力伝送用のコイルモジュールの断面構造を示す断面図。Sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission concerning 2nd Embodiment of this invention. （ａ）および（ｂ）は本発明のその他の実施形態にかかる非接触式電力伝送用のコイルモジュールの断面構造を示す断面図。(A) And (b) is sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission concerning other embodiment of this invention. （ａ）および（ｂ）は本発明のその他の実施形態にかかる非接触式電力伝送用のコイルモジュールの断面構造を示す断面図。(A) And (b) is sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission concerning other embodiment of this invention. 従来の非接触式電力伝送用のコイルモジュールとこれに対向するコイルモジュールとの断面構造を示す断面図。Sectional drawing which shows the cross-section of the conventional coil module for non-contact-type electric power transmission, and the coil module facing this. 比較例の非接触式電力伝送用のコイルモジュールの断面構造を示す断面図。Sectional drawing which shows the cross-section of the coil module for non-contact-type electric power transmission of a comparative example.
　（第１実施形態）
　図１～図３を参照して、本発明の第１実施形態について説明する。 (First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.
　図１は、電池パック３３が内蔵された携帯電話１、およびその電池パック３３の二次電池３６を充電するための充電装置２の各断面構造を示している。なお、図１では、携帯電話１を充電するために充電装置２の上側に携帯電話１が置かれた状態を示している。 FIG. 1 shows each cross-sectional structure of the mobile phone 1 in which the battery pack 33 is built in and the charging device 2 for charging the secondary battery 36 of the battery pack 33. FIG. 1 shows a state where the mobile phone 1 is placed on the upper side of the charging device 2 in order to charge the mobile phone 1.
　携帯電話１は、樹脂材料等の非磁性体からなるハウジング３０を含む。例えば、ハウジング３０には、各種情報を表示する表示部３１と、携帯電話１を操作する操作部３２とが設けられている。携帯電話１の電源となる電池パック３３は、このハウジング３０に着脱可能に収納されている。 The mobile phone 1 includes a housing 30 made of a non-magnetic material such as a resin material. For example, the housing 30 is provided with a display unit 31 for displaying various information and an operation unit 32 for operating the mobile phone 1. A battery pack 33 serving as a power source for the mobile phone 1 is detachably housed in the housing 30.
　電池パック３３は、コイルモジュール３５と、コイルモジュール３５に電気的に接続される二次電池３６と、これらを収納するケース３４とを含む。 The battery pack 33 includes a coil module 35, a secondary battery 36 electrically connected to the coil module 35, and a case 34 for storing these.
　充電装置２は、樹脂材料等の非磁性体からなるハウジング１０を含み、ハウジング１０には、コイルモジュール１１および回路基板１２が設けられている。以下、本明細書では、コイルモジュール１１を１次側コイルモジュール１１といい、コイルモジュール３５を２次側コイルモジュール３５という。なお、１次側コイルモジュール１１または２次側コイルモジュール３５が、「非接触式電力伝送用のコイルモジュール」に相当する。 The charging device 2 includes a housing 10 made of a non-magnetic material such as a resin material, and the housing 10 is provided with a coil module 11 and a circuit board 12. Hereinafter, in this specification, the coil module 11 is referred to as a primary coil module 11, and the coil module 35 is referred to as a secondary coil module 35. The primary side coil module 11 or the secondary side coil module 35 corresponds to a “coil module for non-contact power transmission”.
　携帯電話１の電池パック３３を充電装置２によって充電する際の充電動作を説明する。 The charging operation when the battery pack 33 of the mobile phone 1 is charged by the charging device 2 will be described.
　携帯電話１が充電装置２のハウジング１０上に載置されると、充電装置２の１次側コイルモジュール１１と携帯電話１の２次側コイルモジュール３５とが対向して近接した状態となる。 When the mobile phone 1 is placed on the housing 10 of the charging device 2, the primary coil module 11 of the charging device 2 and the secondary coil module 35 of the mobile phone 1 face each other in close proximity.
　ここで、回路基板１２から１次側コイルモジュール１１に所定周波数の交流電流が供給されると、１次側コイルモジュール１１に交番磁束が発生する。この交番磁束により２次側コイルモジュール３５には上記周波数と同じ周波数の誘導起電力が発生する。この誘導起電力により発生する交流電流が直流電流に整流され、その直流電流が二次電池３６に供給されることにより、二次電池３６は充電される。そして、二次電池３６が満充電になったことに基づいて、充電装置２は携帯電話１の充電を停止する。 Here, when an alternating current having a predetermined frequency is supplied from the circuit board 12 to the primary coil module 11, an alternating magnetic flux is generated in the primary coil module 11. Due to this alternating magnetic flux, an induced electromotive force having the same frequency as the above-mentioned frequency is generated in the secondary coil module 35. The alternating current generated by the induced electromotive force is rectified into a direct current, and the direct current is supplied to the secondary battery 36, whereby the secondary battery 36 is charged. Then, based on the secondary battery 36 being fully charged, the charging apparatus 2 stops charging the mobile phone 1.
　図２および図３を参照して、２次側コイルモジュール３５の構成について説明する。 The configuration of the secondary coil module 35 will be described with reference to FIGS.
　図２に示すように、２次側コイルモジュール３５は、平面状の第１のコイル４１と、これが配設される磁性シート４０とを含む。磁性シート４０は、軟磁性のフェライト粉末を焼結させることにより成形されている。 As shown in FIG. 2, the secondary coil module 35 includes a planar first coil 41 and a magnetic sheet 40 on which the first coil 41 is disposed. The magnetic sheet 40 is formed by sintering soft magnetic ferrite powder.
　第１のコイル４１は、導電線を環状に巻回することで形成されている。第１のコイル４１の中央には、中空空間である空芯部４５が設けられている。 The first coil 41 is formed by winding a conductive wire in an annular shape. In the center of the first coil 41, an air core portion 45 which is a hollow space is provided.
　第１のコイル４１が配置される磁性シート４０は、平面視において円環状に形成される平面部４２を含む。図２に示すように、平面部４２の内周縁には、平面部４２から上側に、つまり１次側コイルモジュール１１（図１参照）に向かい突出する円柱状の外形を有する内側突起部４３が設けられている。平面部４２の外周縁には、平面部４２から上側に、つまり１次側コイルモジュール１１（図１参照）に向かい突出する円筒形状の外側突起部４４が設けられている。内側突起部４３および外側突起部４４は、平面部４２に対して垂直に突出している。 The magnetic sheet 40 on which the first coil 41 is disposed includes a flat portion 42 formed in an annular shape in plan view. As shown in FIG. 2, an inner protrusion 43 having a cylindrical outer shape that protrudes upward from the flat portion 42, that is, toward the primary coil module 11 (see FIG. 1), is provided on the inner peripheral edge of the flat portion 42. Is provided. A cylindrical outer protrusion 44 is provided on the outer peripheral edge of the flat portion 42 so as to protrude upward from the flat portion 42, that is, toward the primary coil module 11 (see FIG. 1). The inner projecting portion 43 and the outer projecting portion 44 project perpendicularly to the plane portion 42.
　図３に示すように、内側突起部４３には、断面形状において上側に開口するとともに下側に凹む凹部４７が形成されている。なお、平面部４２の厚さＴ１と内側突起部４３の厚さＴ２とは互いに等しい。また、外側突起部４４には、その下端部から外側に向けて延びる円環状の延長部４６が設けられている。この外側突起部４４の厚さＴ３と平面部４２の厚さＴ１とは互いに等しい。 As shown in FIG. 3, the inner protrusion 43 is formed with a recess 47 that opens upward and is recessed downward in the cross-sectional shape. It should be noted that the thickness T1 of the flat portion 42 and the thickness T2 of the inner protrusion 43 are equal to each other. The outer protrusion 44 is provided with an annular extension 46 extending outward from the lower end thereof. The thickness T3 of the outer protrusion 44 and the thickness T1 of the flat surface 42 are equal to each other.
　磁性シート４０に第１のコイル４１を取り付けた状態において、内側突起部４３は空芯部４５に挿通されている。このとき、内側突起部４３の外周面と空芯部４５の内周縁とは近接している。また、外側突起部４４の内周面と第１のコイル４１の外周縁とは近接している。すなわち、外側突起部４４の内周面と第１のコイル４１の外周縁とは接触しているか、もしくは外側突起部４４および第１のコイル４１の寸法誤差等により僅かな隙間を介して外側突起部４４の内周面と第１のコイル４１の外周縁とが隣り合っている。 In the state where the first coil 41 is attached to the magnetic sheet 40, the inner protrusion 43 is inserted through the air core 45. At this time, the outer peripheral surface of the inner protrusion 43 and the inner periphery of the air core 45 are close to each other. Further, the inner peripheral surface of the outer protrusion 44 and the outer peripheral edge of the first coil 41 are close to each other. That is, the inner peripheral surface of the outer protrusion 44 and the outer periphery of the first coil 41 are in contact with each other, or the outer protrusion via a slight gap due to a dimensional error of the outer protrusion 44 and the first coil 41 or the like. The inner peripheral surface of the portion 44 and the outer peripheral edge of the first coil 41 are adjacent to each other.
　１次側コイルモジュール１１は、２次側コイルモジュール３５と同様に軟磁性のフェライト粉末を焼結させることにより成形されている。１次側コイルモジュール１１は、磁性シート５０と、磁性シート５０に取り付けられる平面状の第２のコイル５１とを含む。磁性シート５０および第２のコイル５１は、磁性シート４０および第１のコイル４１とその構成が概ね共通しているため、対応する部位の符号を５０番台の数字を付してその説明を省略する。なお、図３に示すように、磁性シート４０の内側突起部４３の外形寸法は、磁性シート５０の内側突起部５３の外形寸法よりも大きい。 The primary coil module 11 is formed by sintering soft magnetic ferrite powder in the same manner as the secondary coil module 35. The primary coil module 11 includes a magnetic sheet 50 and a planar second coil 51 attached to the magnetic sheet 50. Since the magnetic sheet 50 and the second coil 51 are substantially the same in configuration as the magnetic sheet 40 and the first coil 41, the corresponding parts are denoted by reference numerals in the 50s and the description thereof is omitted. . As shown in FIG. 3, the outer dimension of the inner protrusion 43 of the magnetic sheet 40 is larger than the outer dimension of the inner protrusion 53 of the magnetic sheet 50.
　１次側コイルモジュール１１と２次側コイルモジュール３５との間に形成される磁気回路について説明する。 A magnetic circuit formed between the primary coil module 11 and the secondary coil module 35 will be described.
　１次側コイルモジュール１１と２次側コイルモジュール３５とが近接した状態において、第２のコイル５１に交流電流が供給されたときには、以下の磁気回路が形成する。すなわち、図３に示すように、第２のコイル５１の内周側から第１のコイル４１の内周側に向かい、磁性シート４０を介して第１のコイル４１の外周側から第２のコイル５１の外周側に向かい、磁性シート５０を介して第２のコイル５１の内周側に戻る磁路が形成される。なお、第２のコイル５１の電流の向きによっては、上記磁気回路とは反対の磁束の流れとなる磁気回路が形成される。すなわち、１次側コイルモジュール１１と２次側コイルモジュール３５との間で、１次側コイルモジュール１１に供給される交流電流に基づいて、上述の磁気回路と、この磁気回路とは反対の磁束の流れとなる磁気回路とが交番的に形成されるようになる。 When the alternating current is supplied to the second coil 51 in a state where the primary coil module 11 and the secondary coil module 35 are close to each other, the following magnetic circuit is formed. That is, as shown in FIG. 3, the second coil 51 moves from the inner peripheral side of the first coil 41 toward the inner peripheral side of the first coil 41, and the second coil from the outer peripheral side of the first coil 41 through the magnetic sheet 40. A magnetic path is formed which faces the outer peripheral side of 51 and returns to the inner peripheral side of the second coil 51 via the magnetic sheet 50. Depending on the direction of the current in the second coil 51, a magnetic circuit having a magnetic flux flow opposite to that of the magnetic circuit is formed. That is, based on the alternating current supplied to the primary side coil module 11 between the primary side coil module 11 and the secondary side coil module 35, the above-mentioned magnetic circuit and the magnetic flux opposite to this magnetic circuit. The magnetic circuit that becomes the flow of the current is formed alternately.
　このように、第２のコイル５１に生じる磁束は、内側突起部５３を通るとともに内側突起部４３に向かう。このとき、第２のコイル５１の空芯部５５に向かう磁束は内側突起部５３を通過することにより２次側コイルモジュール３５に向かうようになる。そして、内側突起部５３から出る磁束は、内側突起部４３に向かうようになる。 Thus, the magnetic flux generated in the second coil 51 passes through the inner protrusion 53 and toward the inner protrusion 43. At this time, the magnetic flux toward the air core portion 55 of the second coil 51 is directed toward the secondary coil module 35 by passing through the inner protrusion portion 53. Then, the magnetic flux emitted from the inner protrusion 53 is directed toward the inner protrusion 43.
　また、１次側コイルモジュール１１の磁束が２次側コイルモジュール３５に到達したとき、同磁束は、内側突起部４３を介して平面部４２を通過した後、外側突起部４４から第２のコイル５１に向かう。このとき、外側突起部４４は、２次側コイルモジュール３５よりも外側に流れる漏れ磁束の量を低減する。そして、外側突起部４４から第２のコイル５１に向かう磁束は、磁性シート５０の外側突起部５４に向かうため、両コイルモジュール１１，３５よりも外側に向かい流れる漏れ磁束の量が少なくなる。 Further, when the magnetic flux of the primary coil module 11 reaches the secondary coil module 35, the magnetic flux passes through the flat portion 42 via the inner protrusion 43, and then passes from the outer protrusion 44 to the second coil. Head to 51. At this time, the outer protruding portion 44 reduces the amount of leakage magnetic flux that flows outside the secondary coil module 35. And since the magnetic flux which goes to the 2nd coil 51 from the outer side projection part 44 goes to the outer side projection part 54 of the magnetic sheet 50, the quantity of the leakage magnetic flux which flows outside both the coil modules 11 and 35 decreases.
　第１実施形態によれば、以下の効果を奏することができる。 According to the first embodiment, the following effects can be achieved.
　（１）磁性シート４０に外側突起部４４が設けられることにより、２次側コイルモジュール３５よりも外側に向かい流れる漏れ磁束の量を少なくすることができる。 (1) By providing the outer protrusion 44 on the magnetic sheet 40, the amount of leakage magnetic flux that flows outward from the secondary coil module 35 can be reduced.
　さらに、磁性シート４０に内側突起部４３が設けられることにより、磁束が２次側コイルモジュール３５から１次側コイルモジュール１１に向かう場合には、第１のコイル４１の空芯部４５に向けて流れる磁束が、内側突起部４３から１次側コイルモジュール１１に向けて流れるようになる。したがって、両コイルモジュール１１，３５間の漏れ磁束の量を少なくすることができる。 Furthermore, by providing the inner protrusion 43 on the magnetic sheet 40, when the magnetic flux is directed from the secondary coil module 35 to the primary coil module 11, the magnetic sheet 40 is directed toward the air core 45 of the first coil 41. The flowing magnetic flux flows from the inner protrusion 43 toward the primary coil module 11. Therefore, the amount of leakage magnetic flux between the two coil modules 11 and 35 can be reduced.
　加えて、１次側コイルモジュール１１にも同様に内側突起部５３および外側突起部５４が設けられている。このため、両コイルモジュール１１，３５との間の磁束は、内側突起部４３，５３間および外側突起部４４，５４間にそれぞれ流れる。したがって、両コイルモジュール１１，３５間の漏れ磁束の量を一層少なくすることができる。 In addition, the primary coil module 11 is similarly provided with an inner protrusion 53 and an outer protrusion 54. Therefore, the magnetic flux between the coil modules 11 and 35 flows between the inner protrusions 43 and 53 and between the outer protrusions 44 and 54, respectively. Therefore, the amount of leakage magnetic flux between both the coil modules 11 and 35 can be further reduced.
　（２）図８に示すように、２次側コイルモジュール３５の構成として、平板状に成形した磁性シート３００に空芯コイル３１０を取り付け、磁性シート３００の空芯コイル３１０よりも外側の部位３２０を折り曲げてケース３４に取り付けるものが考えられる。このような構成によれば、図７に示す構成と比較して漏れ磁束の量を低減することができる。 (2) As shown in FIG. 8, as the configuration of the secondary coil module 35, the air core coil 310 is attached to the magnetic sheet 300 formed into a flat plate shape, and the portion 320 outside the air core coil 310 of the magnetic sheet 300. It is conceivable to bend and attach to the case 34. According to such a configuration, the amount of leakage magnetic flux can be reduced as compared with the configuration shown in FIG.
　ただし、上記部位３２０が上側に向かうにつれて径方向の外側に傾斜するため、上記部位３２０からの磁束が１次側コイルモジュール１１（図３参照）に向かい流れるとき、磁束が上記部位３２０に沿って流れて磁束が外側に広がるおそれがある。その結果、両コイルモジュール１１，３５の外側に流れる漏洩磁束を少なくする効果が低くなる。なお、図８の構成を１次側コイルモジュール１１に適用しても同様の問題が生じることとなる。 However, since the portion 320 is inclined outward in the radial direction toward the upper side, when the magnetic flux from the portion 320 flows toward the primary coil module 11 (see FIG. 3), the magnetic flux is along the portion 320. The magnetic flux may flow and spread outward. As a result, the effect of reducing the leakage magnetic flux flowing outside the coil modules 11 and 35 is reduced. Note that the same problem occurs even when the configuration of FIG. 8 is applied to the primary coil module 11.
　その点、第１実施形態では、外側突起部４４が平面部４２に対して垂直に突出する形状であるため、図８に示す構成と比較して、外側突起部４４から流れる磁束は垂直下側に向かい流れる（図３参照）。このため、図８に示す構成よりも両コイルモジュール１１，３５間の漏れ磁束の量を少なくすることができる。 In that respect, in the first embodiment, since the outer protrusion 44 protrudes perpendicularly to the flat portion 42, the magnetic flux flowing from the outer protrusion 44 is lower than the configuration shown in FIG. (See Fig. 3). For this reason, the amount of leakage magnetic flux between the two coil modules 11 and 35 can be reduced as compared with the configuration shown in FIG.
　（３）２次側コイルモジュール３５が電池パック３３に内蔵されている。したがって、充電装置２による電池パック３３の二次電池３６の充電効率を向上させることができる。 (3) The secondary coil module 35 is built in the battery pack 33. Therefore, the charging efficiency of the secondary battery 36 of the battery pack 33 by the charging device 2 can be improved.
　また、２次側コイルモジュール３５と１次側コイルモジュール１１との間で電圧信号の送受信を行う場合には、両コイルモジュール１１，３５間での漏れ磁束の量が少ないため、より適切に電圧信号の送受信を行うことができる。 In addition, when voltage signals are transmitted and received between the secondary coil module 35 and the primary coil module 11, the amount of leakage magnetic flux between both the coil modules 11 and 35 is small, so that the voltage is more appropriately set. Signals can be transmitted and received.
　（４）外側突起部４４には延長部４６が設けられている。したがって、延長部４６が省略された外側突起部と比較して、１次側コイルモジュール１１から２次側コイルモジュール３５に向けて磁束が流れるとき、外側突起部５４から外側突起部４４に向かい流れる磁束を受ける面積が大きくなる。このため、両コイルモジュール１１，３５間の漏れ磁束の量をより一層少なくすることができる。また、２次側コイルモジュール３５から１次側コイルモジュール１１に向けて磁束が流れるときには、外側突起部５４の延長部５６により外側突起部４４の延長部４６が奏する効果と同様の効果が得られる。 (4) The outer protrusion 44 is provided with an extension 46. Therefore, when the magnetic flux flows from the primary side coil module 11 toward the secondary side coil module 35 as compared with the outer side protruding part in which the extension part 46 is omitted, it flows from the outer side protruding part 54 toward the outer side protruding part 44. The area receiving the magnetic flux increases. For this reason, the amount of leakage magnetic flux between the two coil modules 11 and 35 can be further reduced. Further, when the magnetic flux flows from the secondary coil module 35 toward the primary coil module 11, an effect similar to the effect produced by the extension 46 of the outer projection 44 is obtained by the extension 56 of the outer projection 54. .
　（第２実施形態）
　図４を参照して、本発明の第２実施形態について説明する。第２実施形態では、第１実施形態と比較して異なる部分について詳細に説明するとともに、同一構成には同一符号を付してその説明を省略する。 (Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. In the second embodiment, portions different from those in the first embodiment will be described in detail, and the same components are denoted by the same reference numerals and description thereof will be omitted.
　第１実施形態では、磁性シート４０の平面部４２の厚さＴ１と、内側突起部４３の厚さＴ２および外側突起部４４の厚さＴ３とが互いに等しくなるように形成されていた。これに対して、第２実施形態では、磁性シート４０に代えて磁性シート６０を用いている。磁性シート６０は、同シート６０の各部位の厚みが異なるように形成されている。なお、以下に説明する構成は、１次側コイルモジュール１１にも適用することが可能である。 In the first embodiment, the thickness T1 of the planar portion 42 of the magnetic sheet 40, the thickness T2 of the inner protrusion 43, and the thickness T3 of the outer protrusion 44 are formed to be equal to each other. In contrast, in the second embodiment, a magnetic sheet 60 is used instead of the magnetic sheet 40. The magnetic sheet 60 is formed so that the thickness of each part of the sheet 60 is different. The configuration described below can also be applied to the primary coil module 11.
　図４に示すように、磁性シート６０は、空芯コイル６１が配置されるとともに平面視において円環状に形成される平面部６２を含む。 As shown in FIG. 4, the magnetic sheet 60 includes a flat surface portion 62 in which the air-core coil 61 is disposed and formed in an annular shape in plan view.
　平面部６２の内周縁には、同平面部６２から開口部側に向かい延びる円柱状の外形を有する内側突起部６３が設けられている。平面部６２の外周縁には、同平面部６２から開口部側に向かい延びる円筒形状の外側突起部６４が設けられている。 An inner protrusion 63 having a cylindrical outer shape extending from the flat portion 62 toward the opening is provided on the inner peripheral edge of the flat portion 62. A cylindrical outer protrusion 64 is provided on the outer peripheral edge of the flat portion 62 and extends from the flat portion 62 toward the opening.
　内側突起部６３は、断面形状において磁性シート６０の底面６６から突出する突形状となる。すなわち、内側突起部６３には、第１実施形態の内側突起部４３のような凹部が形成されていない。換言すれば、内側突起部６３は、空芯コイル６１の空芯部６５に対応する部分を開口部側に向けて平面部６２よりも厚みを増大させるように形成されている。それゆえ、内側突起部６３の厚さＨ１は、平面部６２の厚さＴ１よりも厚い。また、内側突起部６３の厚さＨ３は、平面部６２の厚さＴ１よりも厚い。 The inner protrusion 63 has a protruding shape that protrudes from the bottom surface 66 of the magnetic sheet 60 in the cross-sectional shape. In other words, the inner protrusion 63 is not formed with a recess like the inner protrusion 43 of the first embodiment. In other words, the inner projecting portion 63 is formed so that the portion corresponding to the air core portion 65 of the air core coil 61 is directed to the opening side and the thickness is increased more than the flat surface portion 62. Therefore, the thickness H1 of the inner protrusion 63 is thicker than the thickness T1 of the flat portion 62. Further, the thickness H3 of the inner protrusion 63 is thicker than the thickness T1 of the flat portion 62.
　外側突起部６４は、断面形状において磁性シート６０の底面６６から開口部側に突起する突形状となる。すなわち、外側突起部６４は、平面部６２の外周縁を同平面部６２の空芯コイル６１が配置される部位よりも厚みを増大させるように形成されている。それゆえ、外側突起部６４の厚さＨ２は、平面部６２の厚さＴ１よりも厚い。また、外側突起部６４の厚さＨ４は、平面部６２の厚さＴ１よりも厚い。 The outer protruding portion 64 has a protruding shape that protrudes from the bottom surface 66 of the magnetic sheet 60 toward the opening in the cross-sectional shape. That is, the outer protrusion 64 is formed so that the outer peripheral edge of the flat portion 62 is thicker than the portion of the flat portion 62 where the air-core coil 61 is disposed. Therefore, the thickness H2 of the outer protrusion 64 is thicker than the thickness T1 of the flat portion 62. Further, the thickness H4 of the outer protrusion 64 is thicker than the thickness T1 of the flat portion 62.
　第２実施形態によれば第１実施形態の効果（１）～（３）に加え、以下の効果を奏することができる。 According to the second embodiment, in addition to the effects (1) to (3) of the first embodiment, the following effects can be obtained.
　（５）内側突起部６３は、磁性シート６０の厚みを局所的に増大させることにより形成されている。このため、第１実施形態の内側突起部４３と比較して、空芯コイル６１から空芯部６５に向かい流れる磁束量を内側突起部６３によって増大させることができる。このため、両コイルモジュール１１，３５間の漏れ磁束の量を一層少なくすることができる。 (5) The inner protrusion 63 is formed by locally increasing the thickness of the magnetic sheet 60. For this reason, the amount of magnetic flux flowing from the air core coil 61 toward the air core portion 65 can be increased by the inner protrusion portion 63 as compared with the inner protrusion portion 43 of the first embodiment. For this reason, the amount of leakage magnetic flux between the coil modules 11 and 35 can be further reduced.
　（６）外側突起部６４は、磁性シート６０の厚みを局所的に増大させることにより形成されている。このため、内側突起部４３のような凹部が設けられる構成と比較して、外側突起部６４に流れる磁束量を増大させることができる。このため、両コイルモジュール１１，３５間の漏れ磁束の量を一層少なくすることができる。 (6) The outer protrusion 64 is formed by locally increasing the thickness of the magnetic sheet 60. For this reason, compared with the structure in which the recessed part like the inner side projection part 43 is provided, the magnetic flux amount which flows into the outer side projection part 64 can be increased. For this reason, the amount of leakage magnetic flux between the coil modules 11 and 35 can be further reduced.
　（その他の実施形態）
　本発明の非接触式電力伝送用のコイルモジュールおよびこれを備える電池パックの具体的な構成は、上記各実施形態の内容に限定されるものではなく、例えば以下の変更が可能である。また、以下の変形例は、上記各実施形態についてのみ適用されるものではなく、異なる変形例同士を互いに組み合わせて実施することもできる。 (Other embodiments)
The specific configurations of the coil module for non-contact power transmission and the battery pack including the same according to the present invention are not limited to the contents of the above embodiments, and for example, the following modifications are possible. Further, the following modifications are not applied only to the above-described embodiments, and different modifications can be combined with each other.
　・第１実施形態において、図５（ａ）に示すように、磁性シート４０から外側突起部４４を省略することもできる。この場合、第１のコイル４１の径方向において、平面部４２が第１のコイル４１の外周縁よりも外側に延びることが好ましい。このような構成により、図７のコイルモジュール１００，２００と比較して、第１のコイル４１の径方向の外側への漏れ磁束の量を少なくすることができる。また、図５（ｂ）に示すように、磁性シート４０から内側突起部４３を省略することもできる。図５（ａ）、（ｂ）に示す構成においても、第１実施形態の効果（１）に準じた効果を奏することができる。なお、図５（ａ）、（ｂ）に示す構成は１次側コイルモジュール１１についても適用することができる。 -In 1st Embodiment, as shown to Fig.5 (a), the outer side protrusion part 44 can also be abbreviate | omitted from the magnetic sheet 40. FIG. In this case, it is preferable that the flat portion 42 extends outward from the outer peripheral edge of the first coil 41 in the radial direction of the first coil 41. With such a configuration, the amount of magnetic flux leakage to the outside in the radial direction of the first coil 41 can be reduced as compared with the coil modules 100 and 200 of FIG. Further, as shown in FIG. 5B, the inner protrusion 43 can be omitted from the magnetic sheet 40. Also in the configuration shown in FIGS. 5A and 5B, an effect according to the effect (1) of the first embodiment can be obtained. The configurations shown in FIGS. 5A and 5B can also be applied to the primary coil module 11.
　・第１実施形態においては、両突起部５３，５４を有する１次側コイルモジュール１１と両突起部４３，４４を有する２次側コイルモジュール３５との組み合わせであったが、両コイルモジュール１１，３５の組み合わせはこれに限られない。以下にその他のコイルモジュールの組み合わせについて説明する。 -In 1st Embodiment, although it was the combination of the primary side coil module 11 which has both the protrusion parts 53 and 54, and the secondary side coil module 35 which has both the protrusion parts 43 and 44, The combination of 35 is not limited to this. Hereinafter, combinations of other coil modules will be described.
　ここでは、両突起部５３，５４を有する１次側コイルモジュール１１を「第１の１次側コイルモジュール」とし、内側突起部５３のみを有するものを「第２の１次側コイルモジュール」とし、外側突起部５４のみを有するものを「第３の１次側コイルモジュール」とする。一方、両突起部４３，４４を有する２次側コイルモジュール３５を「第１の２次側コイルモジュール」とし、内側突起部４３のみを有するものを「第２の２次側コイルモジュール」とし、外側突起部４４のみを有するものを「第３の２次側コイルモジュール」とする。このとき、その他のコイルモジュールの組み合わせは以下の通りとなる。
（Ａ）第１の１次側コイルモジュールと第２の２次側コイルモジュール
（Ｂ）第１の１次側コイルモジュールと第３の２次側コイルモジュール
（Ｃ）第２の１次側コイルモジュールと第１の２次側コイルモジュール
（Ｄ）第２の１次側コイルモジュールと第２の２次側コイルモジュール
（Ｅ）第２の１次側コイルモジュールと第３の２次側コイルモジュール
（Ｆ）第３の１次側コイルモジュールと第１の２次側コイルモジュール
（Ｇ）第３の１次側コイルモジュールと第２の２次側コイルモジュール
（Ｈ）第３の１次側コイルモジュールと第３の２次側コイルモジュール
　・第２実施形態において、図６（ａ）に示すように、磁性シート６０から外側突起部６４を省略することもできる。この場合、第１のコイル６１の径方向において、平面部６２が第１のコイル６１の外周縁よりも外側に延びることが好ましい。このような構成により、図７に示すコイルモジュール１００，２００と比較して、第１のコイル６１の径方向の外側への漏れ磁束の量を少なくすることができる。また、図６（ｂ）に示すように、磁性シート６０から内側突起部６３を省略することもできる。図６（ａ）、（ｂ）に示す構成においても、第１実施形態の効果（１）に準じた効果を奏することができる。なお、図６（ａ）、（ｂ）に示す構成は１次側コイルモジュール１１についても適用することができる。 Here, the primary coil module 11 having both the protrusions 53 and 54 is referred to as a “first primary coil module”, and the one having only the inner protrusion 53 is referred to as a “second primary coil module”. The one having only the outer projection 54 is referred to as a “third primary coil module”. On the other hand, the secondary coil module 35 having both protrusions 43 and 44 is referred to as a “first secondary coil module”, and the one having only the inner protrusion 43 is referred to as a “second secondary coil module”. A module having only the outer projection 44 is referred to as a “third secondary coil module”. At this time, combinations of other coil modules are as follows.
(A) 1st primary side coil module and 2nd secondary side coil module (B) 1st primary side coil module and 3rd secondary side coil module (C) 2nd primary side coil Module, first secondary coil module (D), second primary coil module, second secondary coil module (E), second primary coil module, and third secondary coil module (F) Third primary coil module and first secondary coil module (G) Third primary coil module and second secondary coil module (H) Third primary coil Module and Third Secondary Coil Module In the second embodiment, the outer protrusion 64 can be omitted from the magnetic sheet 60 as shown in FIG. In this case, it is preferable that the planar portion 62 extends outward from the outer peripheral edge of the first coil 61 in the radial direction of the first coil 61. With such a configuration, the amount of magnetic flux leakage to the outside in the radial direction of the first coil 61 can be reduced as compared with the coil modules 100 and 200 shown in FIG. Further, as shown in FIG. 6B, the inner protrusion 63 can be omitted from the magnetic sheet 60. Also in the configuration shown in FIGS. 6A and 6B, the effect according to the effect (1) of the first embodiment can be obtained. The configurations shown in FIGS. 6A and 6B can also be applied to the primary coil module 11.
　・上記各実施形態において、外側突起部４４，５４，６４は、平面部４２，５２，６２から開口部側に向かうにつれて径方向の外側に傾斜する形状とすることもできる。この場合においても、第１実施形態の効果（１）を奏することができる。 In each of the above embodiments, the outer protrusions 44, 54, 64 may be shaped to incline outward in the radial direction from the flat portions 42, 52, 62 toward the opening side. Even in this case, the effect (1) of the first embodiment can be achieved.
　・上記各実施形態では、軟磁性を有するフェライト粉末を焼結することにより磁性シート４０，５０，６０を成形したが、磁性シート４０～６０の成形方法はこれに限られない。例えば、ゴム等の高分子素材を結合材料として用いることによりフェライト粉末をシート状に成形することもできる。また、磁性シート４０～６０を形成する材料は、フェライト粉末に限られず、ケイ素鋼板、パーマロイ、鉄等の他の軟磁性材料であってもよい。 In the above embodiments, the magnetic sheets 40, 50, 60 are formed by sintering ferrite powder having soft magnetism, but the forming method of the magnetic sheets 40-60 is not limited thereto. For example, the ferrite powder can be formed into a sheet by using a polymer material such as rubber as a binding material. The material forming the magnetic sheets 40 to 60 is not limited to ferrite powder, and may be other soft magnetic materials such as silicon steel plate, permalloy, iron and the like.
　・上記各実施形態において、１次側コイルモジュール１１と２次側コイルモジュール３５との電磁誘導により、充電装置２と携帯電話１との間で二次電池３６の充電状態を示す情報を電気信号として送受信を行うこともできる。また、このような非接触式電力伝送用のコイルモジュールと、これに対向するコイルモジュールとの電磁誘導により、上記各実施形態のような二次電池３６を充電するための電力の入出力を省略して、上記電気信号の送受信のみを行うこともできる。 In each of the embodiments described above, information indicating the charging state of the secondary battery 36 between the charging device 2 and the mobile phone 1 by the electromagnetic induction between the primary coil module 11 and the secondary coil module 35 is an electric signal. Can also be sent and received. In addition, input / output of power for charging the secondary battery 36 as in each of the above embodiments is omitted by electromagnetic induction between the coil module for non-contact power transmission and the coil module facing the coil module. Thus, only the transmission and reception of the electric signal can be performed.

Claims (6)

  1. 　平面状に巻回された第１のコイルと、この第１のコイルが配設される磁性シートとを備え、前記第１のコイルとこれに対向して配置される第２のコイルとの間で電磁誘導による電力の伝送を行う非接触式電力伝送用のコイルモジュールにおいて、
    　前記磁性シートは、前記第１のコイルの中央および前記第１のコイルよりも外側の少なくとも一方において、前記第２のコイルに向けて突出する突起部を含むことを特徴とする非接触式電力伝送用のコイルモジュール。     A first coil wound in a planar shape and a magnetic sheet on which the first coil is disposed, and between the first coil and a second coil disposed to face the first coil In the coil module for non-contact power transmission that transmits power by electromagnetic induction at
    The magnetic sheet includes a protrusion that protrudes toward the second coil at least one of the center of the first coil and the outer side of the first coil. Coil module.
  2. 　前記突起部は、前記磁性シートの厚さを局所的に増大させることにより形成されてなる請求項１に記載の非接触式電力伝送用のコイルモジュール。 2. The coil module for non-contact power transmission according to claim 1, wherein the protrusion is formed by locally increasing the thickness of the magnetic sheet.
  3. 　前記突起部は、前記磁性シートの底面から垂直に突出していることを特徴とする請求項１に記載の非接触式電力伝送用のコイルモジュール。 2. The coil module for non-contact power transmission according to claim 1, wherein the protrusion protrudes vertically from the bottom surface of the magnetic sheet.
  4. 　前記第１のコイルの外側において前記磁性シートに形成される前記突起部は、前記第１のコイルの径方向外側に延出する延長部を含むことを特徴とする請求項１に記載の非接触式電力伝送用のコイルモジュール。 2. The non-contact according to claim 1, wherein the protrusion formed on the magnetic sheet outside the first coil includes an extension extending outward in the radial direction of the first coil. Coil module for power transmission.
  5. 　請求項１～４のいずれか一項に記載の非接触式電力伝送用のコイルモジュールと、同コイルモジュールの前記第１のコイルに発生する誘導起電力により充電される二次電池とを含む電池パック。 A battery comprising: the non-contact power transmission coil module according to any one of claims 1 to 4; and a secondary battery charged by an induced electromotive force generated in the first coil of the coil module. pack.
  6. 　請求項１～４のいずれか一項に記載の非接触式電力伝送用のコイルモジュールと、同コイルモジュールの前記第１のコイルに交流電流を供給する回路基板とを含む充電装置。 A charging device comprising: the coil module for non-contact power transmission according to any one of claims 1 to 4; and a circuit board that supplies an alternating current to the first coil of the coil module.
PCT/JP2011/069581 2010-09-24 2011-08-30 Coil module for contactless electric power transfer, and battery pack and charging device provided with same WO2012039245A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010213949A JP2012070557A (en) 2010-09-24 2010-09-24 Non-contact type electric power transmission coil module and battery pack equipped with the same
JP2010-213949 2010-09-24

Publications (1)

Publication Number Publication Date
WO2012039245A1 true WO2012039245A1 (en) 2012-03-29

Family

ID=45873735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/069581 WO2012039245A1 (en) 2010-09-24 2011-08-30 Coil module for contactless electric power transfer, and battery pack and charging device provided with same

Country Status (3)

Country Link
JP (1) JP2012070557A (en)
TW (1) TW201214915A (en)
WO (1) WO2012039245A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108199436A (en) * 2018-01-15 2018-06-22 杭州电子科技大学 Wireless charging system
CN108306428A (en) * 2018-01-15 2018-07-20 杭州电子科技大学 Charging equipment method for detecting position based on wireless charging
CN108321946A (en) * 2018-01-15 2018-07-24 杭州电子科技大学 Wireless charging device
CN108390463A (en) * 2018-01-15 2018-08-10 杭州电子科技大学 Charging equipment position detecting device based on wireless charging
CN108565982A (en) * 2018-06-13 2018-09-21 北京有感科技有限责任公司 Coil winding arrangement and wireless power supply system
WO2019051109A1 (en) 2017-09-06 2019-03-14 Wireless Advanced Vehicle Electrification, Inc. Wireless power transfer pad with ferrite chimney
EP3525220A4 (en) * 2016-10-06 2020-04-08 LG Innotek Co., Ltd. Coil block for wireless charging and method for manufacturing same
US11437855B2 (en) 2017-12-22 2022-09-06 Wireless Advanced Vehicle Electrification, Llc Wireless power transfer pad with multiple windings and magnetic pathway between windings

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012101729A1 (en) 2011-01-26 2012-08-02 パナソニック株式会社 Non-contact charging module and non-contact charging instrument
EP2712053A4 (en) 2011-06-14 2014-11-05 Panasonic Corp Communication apparatus
JP5988146B2 (en) * 2011-11-15 2016-09-07 パナソニックＩｐマネジメント株式会社 Transmission coil and portable radio terminal
US10204734B2 (en) 2011-11-02 2019-02-12 Panasonic Corporation Electronic device including non-contact charging module and near field communication antenna
JP2013169122A (en) 2012-02-17 2013-08-29 Panasonic Corp Non-contact charge module and portable terminal having the same
JP6168500B2 (en) 2012-04-10 2017-07-26 パナソニックＩｐマネジメント株式会社 Wireless power transmission device, power transmission device, and power reception device
JP5885570B2 (en) * 2012-04-13 2016-03-15 キヤノン株式会社 Wireless power transmission system, wireless power transmission device, wireless power transmission method, wireless power transmission device control method, and program.
JP6112383B2 (en) 2012-06-28 2017-04-12 パナソニックＩｐマネジメント株式会社 Mobile device
JP6094016B2 (en) * 2013-10-10 2017-03-15 ホシデン株式会社 Contactless power supply mechanism and secondary coil for contactless power supply mechanism
CN109065342A (en) * 2014-03-24 2018-12-21 苹果公司 Magnetic screen in induction power transmission
KR102166881B1 (en) * 2014-04-03 2020-10-16 엘지이노텍 주식회사 Wireless power transmitting apparatus
JP2016061656A (en) * 2014-09-17 2016-04-25 株式会社東芝 Automatic analyzer
CN104319076B (en) * 2014-10-08 2018-03-23 中兴通讯股份有限公司 A kind of non-contact transformer
US20180286550A1 (en) 2017-03-28 2018-10-04 Tdk Corporation Soft magnetic ribbon for magnetic core, magnetic core, coil unit, and wireless power transmission unit
JP7318309B2 (en) * 2019-05-28 2023-08-01 京セラドキュメントソリューションズ株式会社 image forming device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008235862A (en) * 2007-02-20 2008-10-02 Seiko Epson Corp Coil unit and electronic instrument
WO2008156025A1 (en) * 2007-06-20 2008-12-24 Panasonic Electric Works Co., Ltd. Non-contact power transmitting device and method for fabricating its secondary side

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008235862A (en) * 2007-02-20 2008-10-02 Seiko Epson Corp Coil unit and electronic instrument
WO2008156025A1 (en) * 2007-06-20 2008-12-24 Panasonic Electric Works Co., Ltd. Non-contact power transmitting device and method for fabricating its secondary side

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3525220A4 (en) * 2016-10-06 2020-04-08 LG Innotek Co., Ltd. Coil block for wireless charging and method for manufacturing same
WO2019051109A1 (en) 2017-09-06 2019-03-14 Wireless Advanced Vehicle Electrification, Inc. Wireless power transfer pad with ferrite chimney
EP3679639A4 (en) * 2017-09-06 2021-06-02 Wireless Advanced Vehicle Electrification, Inc. Wireless power transfer pad with ferrite chimney
US11437855B2 (en) 2017-12-22 2022-09-06 Wireless Advanced Vehicle Electrification, Llc Wireless power transfer pad with multiple windings and magnetic pathway between windings
US11764613B2 (en) 2017-12-22 2023-09-19 Wireless Advanced Vehicle Electrification, Llc Wireless power transfer pad with multiple windings and magnetic pathway between windings
CN108199436A (en) * 2018-01-15 2018-06-22 杭州电子科技大学 Wireless charging system
CN108306428A (en) * 2018-01-15 2018-07-20 杭州电子科技大学 Charging equipment method for detecting position based on wireless charging
CN108321946A (en) * 2018-01-15 2018-07-24 杭州电子科技大学 Wireless charging device
CN108390463A (en) * 2018-01-15 2018-08-10 杭州电子科技大学 Charging equipment position detecting device based on wireless charging
CN108565982A (en) * 2018-06-13 2018-09-21 北京有感科技有限责任公司 Coil winding arrangement and wireless power supply system
CN108565982B (en) * 2018-06-13 2024-01-09 合肥有感科技有限责任公司 Coil winding structure and wireless power supply system

Also Published As

Publication number Publication date
JP2012070557A (en) 2012-04-05
TW201214915A (en) 2012-04-01

Similar Documents

Publication Publication Date Title
WO2012039245A1 (en) Coil module for contactless electric power transfer, and battery pack and charging device provided with same
US10218222B2 (en) Non-contact charging module having a wireless charging coil and a magnetic sheet
US10291069B2 (en) Mobile terminal and chargeable communication module
JP5118394B2 (en) Non-contact power transmission equipment
US20180109139A1 (en) Mobile terminal including wireless charging module
JP5942084B2 (en) Non-contact charging module, non-contact charging device and portable device using the same
JP5845405B2 (en) Receiving side non-contact charging module and receiving side non-contact charging device
US20140306656A1 (en) Non-contact charging module and portable terminal provided with same
JP5721001B2 (en) Coil component and power supply device and charging device using the same
JP4835795B1 (en) Receiving side non-contact charging module and receiving side non-contact charging device
JP4835796B1 (en) Receiving side non-contact charging module and receiving side non-contact charging device
US20150326055A1 (en) Mobile terminal
CN107800197B (en) Wireless power transmission module and electronic device with same
KR101489391B1 (en) Soft magnetism sheet
JP4900525B1 (en) Non-contact charging module, transmitting-side non-contact charging device and receiving-side non-contact charging device provided with the same
JP5700289B2 (en) Transmission coil device and power receiving device and power feeding device using the same
JP6394534B2 (en) Power receiving device and power transmitting device
JP5003834B1 (en) Transmission-side non-contact charging module and transmission-side non-contact charging device using the same
JP5845407B2 (en) Receiving side non-contact charging module and receiving side non-contact charging device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11826691

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11826691

Country of ref document: EP

Kind code of ref document: A1