WO2012081519A1 - Plateforme de chargement en énergie - Google Patents

Plateforme de chargement en énergie Download PDF

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Publication number
WO2012081519A1
WO2012081519A1 PCT/JP2011/078557 JP2011078557W WO2012081519A1 WO 2012081519 A1 WO2012081519 A1 WO 2012081519A1 JP 2011078557 W JP2011078557 W JP 2011078557W WO 2012081519 A1 WO2012081519 A1 WO 2012081519A1
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WO
WIPO (PCT)
Prior art keywords
coil
charging
power supply
position detection
induction coil
Prior art date
Application number
PCT/JP2011/078557
Other languages
English (en)
Japanese (ja)
Inventor
遠矢　正一
雄次 新井
恭三 寺尾
Original Assignee
三洋電機株式会社
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 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP2012548769A priority Critical patent/JPWO2012081519A1/ja
Publication of WO2012081519A1 publication Critical patent/WO2012081519A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • 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
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • 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
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a charging stand that can be charged contactlessly or wirelessly by carrying power by electromagnetic induction to a battery pack housed in a battery-driven device such as a mobile phone.
  • Battery driven devices represented by mobile devices such as mobile phones and portable music players are often driven by a battery pack in order to improve portability.
  • To charge a battery pack stored in such a battery-powered device with the battery pack stored in the battery-powered device, set the battery-powered device in the charger and physically connect the contacts to each other. Do.
  • the power is transferred from the power supply coil built in the charging stand to the induction coil built in the battery pack by using the action of electromagnetic induction. Has been developed (see Patent Document 1).
  • Patent Document 1 discloses a structure in which a power supply coil that is excited by an AC power supply is built in a charging stand, and an induction coil that is electromagnetically coupled to the power supply coil is built in a battery pack. Further, the battery pack also includes a circuit for rectifying the alternating current induced by the induction coil and supplying the rectified current to the battery for charging. According to this structure, the battery pack can be charged in a non-contact state by placing the battery pack on the charging stand.
  • a moving mechanism for detecting the position of the battery-driven device placed on the charging stand and moving the power supply coil to this position is provided.
  • a moving mechanism 13 movable in two axes is provided to move the power supply coil in the XY directions.
  • the power supply coil 11X is moved by the moving mechanism 13X so as to approach the induction coil 51X of the battery drive device 50X.
  • the moving mechanism 13X moves the power supply coil 11X along the charging surface 21X in the X-axis direction and the Y-axis direction to approach the induction coil 51X.
  • the moving mechanism 13X rotates the screw rods 23A and B with a servo motor controlled by a position detection controller, moves the nut members 24A and B screwed into the screw rods 23A and B, and moves the power coil 11X.
  • the servo motor 22 includes an X-axis servo motor 22A that moves the power supply coil 11X in the X-axis direction, and a Y-axis servo motor 22B that moves in the Y-axis direction.
  • the screw rod 23 includes a pair of X-axis screw rods 23A that move the power supply coil 11X in the X-axis direction, and a Y-axis screw rod 23B that moves the power supply coil 11X in the Y-axis direction.
  • the pair of X-axis screw rods 23A are arranged in parallel to each other, driven by the belt 25, and rotated together by the X-axis servomotor 22A.
  • the nut member 24 includes a pair of X-axis nut members 24A screwed into the respective X-axis screw rods 23A and a Y-axis nut member screwed into the Y-axis screw rods 23B.
  • the Y-axis screw rod 23B is coupled so that both ends thereof can be rotated to a pair of X-axis nut members 24A.
  • the power coil 11X is connected to the Y-axis nut material.
  • a main object of the present invention is to provide a charging stand in which a position detection coil can be easily arranged at a predetermined position.
  • a charging stand for charging a battery pack for driving the battery driving device 50, the battery pack or the battery on the upper surface.
  • the main body case 20 provided with a charging surface 21 for placing and charging the battery-driven device 50 with the pack mounted thereon, and with the battery-driven device 50 with the battery pack or battery pack mounted thereon mounted on the charging surface 21
  • the power supply coil 11 incorporated in the main body case 20 in a posture facing the induction coil 51 side on the inner surface of the charging surface 21 so as to enable electromagnetic coupling with the circular induction coil 51 provided in the battery pack.
  • a moving mechanism 13 for moving the power supply coil 11 within the range of the charging surface 21, a power transmission circuit for supplying power to the power supply coil 11, and the charging surface 21.
  • the main body case 20 is divided into an upper case 20A and a lower case 20B, and the upper case 20A includes the charging surface 21, and the upper case 20A is provided with a plurality of fixed cylinders 41 provided with screw holes 42 at the ends in a posture protruding to the lower case 20B side in a state of being joined to the lower case 20B.
  • a fixed hole 46 is formed at the position of the fixed cylinder 41 in a state where it is joined to the case 20A, and the screw hole 42 of the fixed cylinder 41 is substantially aligned with the central axis.
  • a cylindrical hole 38 into which the 41 can be inserted is opened, and the fixed cylinder 41 is inserted into the cylindrical hole 38 in a state where the printed circuit board 37 is in contact with the surface of the upper case 20A constituting the charging surface 21.
  • Insert and further The lower case 20B can fixably constructed by inserting the screws 70 into the screw hole 42 from the fixing hole 46 is joined to the upper case 20A.
  • the upper case and the lower case can be fixed together with the printed board by screwing in a state where the printed board is in contact with the inner surface of the charging surface of the upper case.
  • the upper case and the lower case can be held and fixed without being screwed directly to the printed circuit board.
  • the upper case and the lower case can be fixed. Man-hours can be reduced. Further, since the screw is inserted from the lower case side, it cannot be exposed from the upper surface of the main body case, and the appearance of the charging stand can be made clear.
  • the lower case 20B can further include a holding cylinder 44 for holding the outer periphery of the fixed cylinder 41 around the fixing hole 46.
  • the holding cylinder 44 holds the fixed cylinder 41, and the printed circuit board 37 is placed on the charging surface 21 side at the edge 45 of the holding cylinder 44. It can comprise so that it may contact
  • the height of the holding cylinder 44 is equivalent to the thickness of the printed circuit board 37 with the fixed cylinder 41 inserted into the holding cylinder 44.
  • the charging surface 21 can be separated from the inner surface side. This allows the printed circuit board to be sandwiched between the inner surface of the upper case and the holding cylinder edge of the lower case in a state where the upper case and the lower case are joined, without providing a separate structure for fixing the printed circuit board,
  • the fixing structure of the upper case and the lower case and the fixing structure of the printed circuit board can be made common.
  • the holding cylinder 44 is further extended from the side holding the fixing cylinder 41 to the opposite side to the fixing hole 46, and the fixing hole 46 is
  • the fixing hole 46 can be surrounded by a part of the holding cylinder 44 which is opened at a position recessed from the surface of the lower case 20B and extends to the opposite side.
  • the fixed cylinder 41 can be provided at the four corners of the upper case 20A. Thereby, an upper case, a lower case, and a printed circuit board can be fixed stably.
  • the printed circuit board 37 includes a coil pattern region 37a in which the position detection coil 30 is pattern-wired and a circuit mounting region 37b in which the power transmission circuit is mounted.
  • the coil pattern region 37 a can face the charging surface 21, and the circuit mounting region 37 b can be disposed so as not to overlap the charging surface 21.
  • the empty part which does not provide a position detection coil among printed circuit boards can be used effectively as mounting space for power transmission circuits, and it can contribute to size reduction of a charging stand.
  • the moving mechanism 13 includes an X slide portion 66A that moves in the X direction and a Y slide portion 66B that moves in the Y direction, and the X slide portion.
  • 66A and Y slide portion 66B are slidably connected to each other in an intersecting posture. Thereby, a power supply coil can be freely moved to XY direction.
  • each of the X slide portion 66A and the Y slide portion 66B can be slidably supported in the main body case 20. Accordingly, the X slide portion and the Y slide portion can be moved while being supported in a cantilever manner within the main body case.
  • the power transmission circuit can be mounted on the printed circuit board 37.
  • a power transmission circuit and a position detection coil can be provided on the same board, and the advantage that an electronic component can be arranged efficiently inside a main part case is acquired.
  • FIG. 1 It is a perspective view which shows the state which mounts a battery drive apparatus on a charging stand. It is a disassembled perspective view which shows the inside of the charging stand of FIG. It is a perspective view which shows the lower case of FIG. It is the perspective view seen from diagonally downward which shows the moving stand of FIG. It is the perspective view which looked at the upper case of FIG. 2 from diagonally downward. It is a perspective view which shows the printed circuit board of FIG. It is a block diagram which shows a charging stand and a battery drive apparatus. It is a schematic block diagram of the charging stand concerning one Example of this invention. It is a vertical cross-sectional view of the charging stand shown in FIG. It is a vertical longitudinal cross-sectional view of the charging stand shown in FIG.
  • FIG. 3 is a vertical sectional view taken along line XIII-XIII in FIG. It is an expanded sectional view which shows the fixing structure of FIG. It is a top view which shows the example which made it possible to save a power supply coil out of a charging surface.
  • each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.
  • the contents described in some examples and embodiments may be used in other examples and embodiments.
  • FIG. 1 to 2 show a charging system including a battery-powered device 50 and a charging stand 10 according to an embodiment of the present invention.
  • FIG. 1 is a perspective view of the charging stand 10
  • FIG. 2 shows the internal structure of the charging stand 10 of FIG.
  • the charging stand 10 mounts the battery driving device 50 on the charging stand 10 and charges the secondary battery 52 built in the battery driving device 50 by magnetic induction.
  • the battery drive device 50 includes an induction coil 51 that is electromagnetically coupled to the power supply coil 11.
  • a secondary battery 52 that is charged with electric power induced in the induction coil 51 is incorporated.
  • the battery drive device 50 may be a battery pack BP.
  • the main body case 20 containing the power supply coil 11 is provided with a flat charging surface 21 on which the battery drive device 50 is placed on the upper surface.
  • the charging stand 10 in FIG. 1 is disposed horizontally with the entire charging surface 21 being flat.
  • the charging surface 21 has such a size that various battery drive devices 50 having different sizes and outer shapes can be placed thereon, for example, a quadrangle having a side of 10 cm to 30 cm, or a circle having a diameter of 10 cm to 30 cm.
  • the charging stand has a charging surface that is large enough to mount a plurality of battery-powered devices at the same time, and can also charge a built-in battery in order by mounting a plurality of battery-driven devices together.
  • the charging surface 21 of the main body case 20 has translucency so that the power supply coil 11 moving inside can be visually recognized from the outside. Since this charging stand 10 allows the user to visually confirm that the power supply coil 11 approaches the battery-powered device 50, the user can confirm that the battery-driven device 50 is reliably charged. Therefore, the user can use the charging stand 10 with peace of mind. Furthermore, by providing a light emitting diode that irradiates light to the power supply coil 11, the moving power supply coil 11 and its surroundings are lighted up with the light emitting diode, and the excellent design and the state of movement of the power supply coil 11 are appealed. be able to.
  • FIG. 1 It can also be set as the structure which the light of a light emitting diode permeate
  • FIG. The charging stand 10 irradiates the battery-driven device 50 with a light-emitting diode while charging the battery-driven device 50, or changes the lighting state of the light-emitting diode, such as the emission color and the flashing pattern, in the charged state. It is also possible to clearly notify the state of charge of the battery-powered device 50.
  • the charging stand 10 has a main body case 20 with a plate-like outer shape.
  • the plate-shaped main body case 20 is rectangular.
  • the rectangular main body case may be rectangular or square. Further, the corners of the main body case may be chamfered.
  • the outer shape of the main body case can be polygonal or circular.
  • the body case 20 is made of a resin such as plastic having excellent insulating properties.
  • the upper case 20A and the lower case 20B are divided into two parts, and the printed circuit board 37, the moving mechanism 13, the power supply coil 11 and the like are accommodated therein. ing. Further, on the inner surface of the upper case 20 ⁇ / b> A, a printed board 37 including a position detection coil 30 described later is disposed so as to be interposed between the charging surface 21 and the power supply coil 11. (Charging surface 21)
  • the main body case 20 is provided with a charging surface 21 on the upper surface thereof for mounting and charging the battery drive device 50.
  • the charging stand 10 performs charging by detecting that the battery driving device 50 is placed on the charging surface 21. In other words, even if it is placed on a surface other than the charging surface, it is not charged correctly. Therefore, in order to indicate to the user which part is a chargeable region and which part cannot be charged, an identification means for distinguishing this is provided.
  • the charging surface is enclosed in a frame shape, the surface is satin-finished or textured, colored in a darker color than the area other than the charging surface, or the charging surface is matte while the surface other than the charging surface is glossy For example, a process for distinguishing from other areas is performed.
  • the charging surface can be structurally divided by providing a peripheral wall or the like around the periphery. In this way, the user can distinguish between the area that can be charged and the area that is not so according to the appearance and / or tactile sensation. (Anti-slip means)
  • the charging surface 21 is preferably provided with anti-slip means for preventing the battery driving device 50 from slipping when the battery driving device 50 is placed on the charging surface 21.
  • anti-slip means include various means such as sticking a rubber sheet on the charging surface, providing irregularities on the charging surface, or providing a convex enclosure at a part that distinguishes the charging surface from other regions. Can be used. (Battery drive device 50)
  • the battery drive device 50 is a device driven by the battery pack BP, and for example, a mobile phone, a smartphone, a PDA, a digital camera, a portable music player, a slate type PC, or the like can be used.
  • the battery pack BP can be taken out and charged with only the battery pack BP.
  • the battery pack BP includes not only a replaceable battery pack but also a non-replaceable form built in a battery-driven device. (Induction coil 51)
  • the battery-powered device 50 includes an induction coil 51 as a power receiving coil that is electromagnetically coupled to a power supply coil 11 of the charging stand 10 to be described later and receives power without contact. That is, in a state where the battery pack BP or the battery driving device 50 with the battery pack BP mounted is placed on the charging surface 21 of the charging base 10, the induction coil 51 is moved by the moving mechanism 13 on the inner surface of the charging surface 21, The induction coil 51 is electromagnetically coupled. And the secondary battery built in battery pack BP is charged with the electric power sent from the charging stand 10 without a contact.
  • the induction coil 51 is formed in a substantially circular shape as shown in FIGS.
  • the induction coil 51 is preferably built in the battery pack BP. Thereby, it is possible to take out the battery pack BP from the battery drive device 50 and charge only the battery pack BP.
  • the battery pack is provided with a charging circuit connected to the induction coil.
  • an induction coil may be arranged separately from the battery pack.
  • the charging stand 10 that charges a large number of battery packs BP and battery driving devices 50 (hereinafter also referred to as “battery packs”).
  • the charging surface 21 of the charging stand is configured to be large.
  • the first battery pack has a predetermined capacity
  • the battery packs can be additionally charged so that the remaining capacity is charged again and fully charged.
  • the predetermined capacity can be appropriately set depending on the charging method and the charging time. For example, when a lithium ion secondary battery is used for the battery pack, if constant current charging is performed first and then switching to constant voltage charging is used, constant current charging is compared to constant voltage charging. Since the battery pack can be completed in a short time, it is possible to switch the battery pack or the like to be charged so that only constant current charging is performed on each battery pack first and then constant voltage charging is performed sequentially. (Charging stand 10)
  • the charging stand 10 accommodates the power supply coil 11, the printed circuit board 37, and the moving mechanism 13. (Power supply coil 11)
  • the power supply coil 11 is a power transmission coil for transmitting electric power to the induction coil 51 by electromagnetically coupling the battery pack BP or the induction coil 51 of the battery driving device 50 to which the battery pack BP is mounted. For this reason, the power supply coil 11 is built in the main body case 20 so as to face the induction coil 51 on the inner surface of the charging surface 21.
  • the power supply coil 11 is preferably formed in a circular shape having a size substantially equal to that of the induction coil 51.
  • the circular power supply coil 11 and the induction coil 51 are configured so that the power supply coil 11 is moved so that the power supply coil 11 and the induction coil 51 coincide with each other regardless of the posture of the battery pack placed on the charging surface 21. Can be adjusted.
  • the power supply coil and the induction coil may be formed in an elliptical shape or an oval shape. For example, by making the induction coil into a circular shape and making the power supply coil into a track-like ellipse, the induction coil can be moved to fit within the area of the power supply coil without being completely aligned with the induction coil. Thus, electromagnetic coupling can be realized, and the advantage of simplifying the power coil alignment operation can be obtained. (Movement mechanism 13)
  • the power supply coil 11 is movable by the moving mechanism 13.
  • the power supply coil 11 shown in FIG. 3 is moved in the XY directions by the moving mechanism 13.
  • the power supply coil may be movable only in the X-axis direction or only in the Y-axis direction.
  • the configuration can be greatly simplified by using a single-axis moving mechanism.
  • the power coil is formed in an elongated shape, and the longitudinal direction of the power coil is arranged in a direction (width direction) intersecting the moving direction, so that alignment with the power coil in the width direction can be omitted.
  • matching the central axes of the induction coil and the power supply coil is important for increasing the coupling efficiency. This is because if the centers of the coils are slightly shifted, the coupling efficiency is significantly reduced. For this reason, such a positional shift can be compensated by extending the induction coil in the width direction of the moving mechanism. (Moving table 18)
  • the moving mechanism 13 can move the power supply coil 11 in the XY directions on the square charging surface 21.
  • the power supply coil 11 is disposed on the upper surface of the moving table 18, and the moving mechanism 13 moves the moving table 18 in the X direction and the Y direction.
  • the movable table 18 is slidably mounted on the slide member 66 and moves along the slide member 66.
  • the slide member 66 includes two parts, that is, an X slide part 66A and a Y slide part 66B, and these X slide part 66A and Y slide part 66B are arranged so as to intersect in a cross shape.
  • the movable table 18 is slidably attached to the X slide portion 66A and the Y slide portion 66B.
  • slits for inserting the slide member 66 are provided on the lower surface of the movable table 18 in two upper and lower stages, and the respective slits intersect each other in a posture orthogonal to each other.
  • the X slide part 66A is inserted into one slit
  • the Y slide part 66B is inserted into the other slit
  • the moving base 18 freely moves in the XY direction along these X slide part 66A and Y slide part 66B. it can.
  • the X slide part 66A and the Y slide part 66B each have an outer shape that is substantially T-shaped, and the upper ends of the T-shape are slidably mounted on guide bars 59A and 59B (described later).
  • the lower end of the T-shape is a plate-like portion 66a extended in a plate shape, and is inserted into the slit of the movable table 18.
  • the length of the plate-like portion 66 a is defined according to the moving range of the moving table 18. Preferably, the length is designed so that the plate-like portion 66a does not fall out of the slit in a state where the movable table 18 is moved to the maximum range.
  • a guide bar 59A that guides movement in the X direction and a guide bar 59B that guides movement in the Y direction are fixed to the lower case 20B in an orthogonal posture.
  • a groove portion for holding or inserting the guide rod is formed at the upper ends of the X slide portion 66A and the Y slide portion 66B.
  • the guide bars 59A and 59B are preferably cylindrical.
  • Each X slide portion 66A and Y slide portion 66B are slid along the guide rod while the guide rod is inserted into the groove.
  • the slide member 66 supports the movable table 18 in a cantilever manner that moves only on one side.
  • rack gears 19A and 19B are provided at the ends of the X slide portion 66A and the Y slide portion 66B, respectively.
  • Pinion gears 60A and 60B are arranged in the lower case 20B so as to mesh with the rack gears 19A and 19B.
  • the slide portion is moved along the guide bars 59A and 59B.
  • each pair of pinion gears is paired and spaced apart. The separation distance between the pinion gears is almost equal to that of the rack gear.
  • the rack gear can be moved by the rotational drive of any of the pinion gears without arranging the rack gear over the entire moving distance.
  • the pinion gears 60A and 60B are respectively arranged at about 1/3 of the guide bar, and the length of the rack gears 19A and 19B is also about 1/3 of the guide bar. Accordingly, the rack gear having a short length can be stably moved by the two pinion gears arranged apart from each other.
  • worm wheels 63A and 63B are fixed coaxially to the pinion gears 60A and 60B, and the pinion gears 60A and 60B fixed coaxially are rotated by rotating the worm wheels 63A and 63B.
  • the lower case 20 ⁇ / b> B includes a servo motor 61, and a lead screw 62 (feed screw) is rotated by the servo motor 61.
  • the lead screw 62 is a worm gear, and meshes with worm wheels 63A and 63B fixed coaxially with the two pinion gears 60A and 60B.
  • the power supply coil 11 fixed to the movable table 18 can be moved in the X direction and the Y direction.
  • the drive mechanism including the pinion gears 60A and 60B, the worm wheels 63A and 63B, the lead screw 62, and the servo motor 61 is unitized.
  • a common unitized drive mechanism is used on the X-axis side and the Y-axis side.
  • the rack gears 19A and 19B of the slide members have different heights. For this reason, the unitized drive mechanism is fixed to the X-axis side and the Y-axis side in a mutually inverted posture.
  • the heights of the pinion gears 60A and 60B that mesh with the rack gears 19A and 19B having different heights are changed between the X-axis side and the Y-axis side.
  • the X slide portion 66A intersects with the Y slide portion 66B so as to be located on the upper side. Therefore, in order to mesh with the rack gear 19A of the X slide portion 66A, the unitized drive mechanism is fixed in a posture in which the pinion gear 60A is located on the upper surface side and the worm wheel 63A is located on the lower surface side.
  • the unitized drive mechanism is fixed in a posture in which the pinion gear 60B is located on the lower surface side and the worm wheel 63B is located on the upper surface side.
  • the power supply coil 11 and the printed board 37 are connected by a flexible board 48. As shown in FIGS. 2 and 3, one end of the flexible substrate 48 is connected to the power supply coil, and the other end is connected to the printed circuit board 37. (Printed circuit board 37)
  • a printed circuit board 37 is disposed between the moving area of the power supply coil 11 and the charging surface 21.
  • the printed circuit board 37 is configured to be smaller than the inner wall of the main body case 20 so that it can be incorporated in the main body case 20, and is preferably configured to substantially match the inner surface of the upper case 20 ⁇ / b> A.
  • a rib 43 is provided on the inner surface of the upper case 20A and a notch 39 is provided at a corresponding position on the printed circuit board 37 as shown in the perspective view of FIG.
  • the position detection coil 30 is disposed on the upper surface side of the printed circuit board 37 as shown in FIG.
  • the position detection coil 30 is a member for detecting the position of the induction coil 51 prior to the operation of moving the power supply coil 11 by the moving means so as to coincide with the induction coil 51.
  • a plurality of the position detection coils 30 are arranged on the charging surface 21.
  • the position detection coil 30 is a planar coil and is disposed uniformly on the charging surface 21.
  • the charging surface 21 is not the entire surface of the upper case 20A, and there is a region in the upper case 20A that does not constitute the charging surface 21.
  • the printed circuit board 37 is configured to be approximately the same size as the upper case 20A, there is a region where the position detection coil 30 is not provided.
  • the area of the printed circuit board 37 can be effectively used by using this area as a mounting area for an electronic component such as a power transmission circuit.
  • an electronic component such as a power transmission circuit.
  • the printed circuit board 37 includes a coil pattern region 37a in which the position detection coil 30 is pattern-wired and a circuit mounting region 37b in which the power transmission circuit is mounted.
  • the coil pattern region 37a faces the charging surface 21 in a state where the printed circuit board 37 is fixed to the upper case 20A.
  • the circuit mounting area 37 b does not overlap with the charging surface 21. Accordingly, the electronic component and the position detection coil 30 can be efficiently arranged, and in particular, the empty space of the position detection coil 30 can be effectively used as a storage space for the electronic component.
  • a position detection controller 14 such as a movement control circuit for controlling the movement mechanism 13 and a power transmission circuit for driving the power supply coil 11 is mounted on the circuit mounting area 37 b of the printed circuit board 37.
  • FIG. 7 the circuit diagram of the battery drive apparatus 50 and the charging stand 10 is shown.
  • This battery-driven device 50 has a capacitor 53 connected in parallel with the induction coil 51.
  • the capacitor 53 and the induction coil 51 constitute a parallel resonance circuit 54.
  • the resonance frequency of the capacitor 53 and the induction coil 51 can be efficiently transferred from the power supply coil 11 to the induction coil 51 as a frequency that approximates the frequency of power transfer from the power supply coil 11.
  • a rectifier circuit 57 including a diode 55 that rectifies the alternating current output from the induction coil 51, a smoothing capacitor 56 that smoothes the rectified pulsating flow, and an output from the rectifier circuit 57.
  • a charge control circuit 58 that charges the secondary battery 52 with a direct current.
  • the charging control circuit 58 detects full charge of the secondary battery 52 and stops charging. Note that this circuit is an example, and it is needless to say that an alternative configuration capable of realizing the same function, such as using a diode bridge for the rectifier circuit or using a switching element such as a transistor for the charge control circuit, can be adopted as appropriate. Nor.
  • one charging stand 10 is connected to an AC power supply 12 to induce an electromotive force in the induction coil 51, and the power supply coil 11 moves along the inner surface of the charging surface 21 described above.
  • a position detection controller 14 for detecting the position of the battery driving device 50 placed on the charging surface 21 and controlling the moving mechanism 13 to bring the power supply coil 11 closer to the induction coil 51 of the battery driving device 50.
  • the charging stand 10 incorporates a power supply coil 11, an AC power supply 12, a moving mechanism 13, and a position detection controller 14 in a main body case 20.
  • the charging stand 10 charges the built-in secondary battery 52 of the battery drive device 50 by the following operation. Although this charging stand 10 is not shown in figure, it can also provide separately the power switch which starts operation
  • the position detection controller 14 that has detected the position of the battery-driven device 50 controls the moving mechanism 13 to move the power supply coil 11 along the charging surface 21 with the moving mechanism 13 to Approach the induction coil 51.
  • the power supply coil 11 approaching the induction coil 51 is electromagnetically coupled to the induction coil 51 and carries AC power to the induction coil 51.
  • the battery drive device 50 rectifies the AC power of the induction coil 51 and converts it to DC, and charges the built-in secondary battery 52 with this DC.
  • the charging stand 10 that charges the secondary battery 52 of the battery-powered device 50 by the above operation has the power supply coil 11 connected to the AC power supply 12 built in the main body case 20.
  • the power supply coil 11 is disposed below the charging surface 21 of the main body case 20 and is disposed so as to move along the charging surface 21.
  • the efficiency of power transfer from the power supply coil 11 to the induction coil 51 can be improved by narrowing the interval between the power supply coil 11 and the induction coil 51.
  • the distance between the power supply coil 11 and the induction coil 51 is set to 7 mm or less with the power supply coil 11 approaching the induction coil 51. Therefore, the power supply coil 11 is disposed below the charging surface 21 and as close to the charging surface 21 as possible. Since the power supply coil 11 moves so as to approach the induction coil 51 of the battery drive device 50 mounted on the charging surface 21, the power supply coil 11 is disposed so as to be movable along the lower surface of the charging surface 21.
  • the power supply coil 11 is wound in a spiral shape on a surface parallel to the charging surface 21 and radiates an alternating magnetic flux above the charging surface 21.
  • the power supply coil 11 radiates an alternating magnetic flux orthogonal to the charging surface 21 above the charging surface 21.
  • the power supply coil 11 is supplied with AC power from the AC power supply 12 and radiates AC magnetic flux above the charging surface 21.
  • the power supply coil 11 can increase the inductance by winding a wire around a core 15 made of a magnetic material.
  • the core 15 is made of a magnetic material such as ferrite having a high magnetic permeability, and has a bowl shape that opens upward.
  • the bowl-shaped core 15 has a shape in which a cylindrical portion 15A disposed at the center of the power coil 11 wound in a spiral shape and a cylindrical portion 15B disposed outside are connected at the bottom.
  • the power supply coil 11 having the core 15 can concentrate the magnetic flux to a specific portion and efficiently transmit power to the induction coil 51.
  • the power supply coil does not necessarily need to be provided with a core, and can be an air-core coil. Since the air-core coil is light, a moving mechanism for moving it on the inner surface of the charging surface can be simplified.
  • the power supply coil 11 is substantially equal to the outer diameter of the induction coil 51 and efficiently conveys power to the induction coil 51.
  • the AC power supply 12 supplies high frequency power of, for example, 20 kHz to 1 MHz to the power supply coil 11.
  • the AC power supply 12 is connected to the power supply coil 11 via a connecting member 16 such as a flexible lead wire or a flexible substrate. This is because the power supply coil 11 is moved so as to approach the induction coil 51 of the battery drive device 50 placed on the charging surface 21.
  • the AC power supply 12 includes a self-excited oscillation circuit and a power amplifier that amplifies the AC output from the oscillation circuit.
  • the self-excited oscillation circuit uses the power supply coil 11 as an oscillation coil. Therefore, the oscillation frequency of this oscillation circuit changes due to the inductance of the power supply coil 11.
  • the inductance of the power supply coil 11 changes at the relative position between the power supply coil 11 and the induction coil 51. This is because the mutual inductance between the power supply coil 11 and the induction coil 51 changes at the relative position between the power supply coil 11 and the induction coil 51. Therefore, the self-excited oscillation circuit that uses the power supply coil 11 as the oscillation coil changes as the AC power supply 12 approaches the induction coil 51. For this reason, the self-excited oscillation circuit can detect the relative position between the power supply coil 11 and the induction coil 51 based on a change in the oscillation frequency, and can be used together with the position detection controller 14.
  • the power supply coil 11 is moved by the moving mechanism 13 so as to approach the induction coil 51.
  • 8 to 10 show other examples of the moving mechanism 13.
  • the moving mechanism 13 shown in these drawings moves the power supply coil 11 along the charging surface 21 in the X-axis direction and the Y-axis direction to approach the induction coil 51.
  • the moving mechanism 13 shown in FIGS. 8 to 9 rotates the screw rod 23 by the servo motor 22 controlled by the position detection controller 14 to move the nut member 24 screwed into the screw rod 23, and the power supply coil 11. Is brought close to the induction coil 51.
  • the servo motor 22 includes an X-axis servo motor 22A that moves the power supply coil 11 in the X-axis direction, and a Y-axis servo motor 22B that moves the power coil 11 in the Y-axis direction.
  • the screw rod 23 includes a pair of X-axis screw rods 23A that move the power supply coil 11 in the X-axis direction, and a Y-axis screw rod 23B that moves the power supply coil 11 in the Y-axis direction.
  • the pair of X-axis screw rods 23A are arranged in parallel to each other, driven by the belt 25, and rotated together by the X-axis servomotor 22A.
  • the nut member 24 includes a pair of X-axis nut members 24A screwed into the respective X-axis screw rods 23A, and a Y-axis nut member 24B screwed into the Y-axis screw rods 23B.
  • the Y-axis screw rod 23B is coupled so that both ends thereof can be rotated to a pair of X-axis nut members 24A.
  • the power coil 11 is connected to the Y-axis nut member 24B.
  • the moving mechanism 13 shown in FIG. 9 is provided with a guide rod 26 parallel to the Y-axis screw rod 23B in order to move the power supply coil 11 in the Y-axis direction in a horizontal posture. Both ends of the guide rod 26 are connected to the pair of X-axis nut members 24A and move together with the pair of X-axis nut members 24A. The guide rod 26 penetrates the guide portion 27 connected to the power supply coil 11 so that the power supply coil 11 can be moved along the guide rod 26 in the Y-axis direction.
  • the power supply coil 11 moves in the Y-axis direction in a horizontal posture through the Y-axis screw rod 23B and the Y-axis nut member 24B that moves along the guide rod 26 and the guide portion 27 that are arranged in parallel to each other. To do.
  • the X-axis servo motor 22A rotates the X-axis screw rod 23A
  • the pair of X-axis nut members 24A move along the X-axis screw rod 23A
  • the Y-axis screw rod 23B and the guide rod 26 is moved in the X-axis direction.
  • the Y-axis servo motor 22B rotates the Y-axis screw rod 23B
  • the Y-axis nut member 24B moves along the Y-axis screw rod 23B and moves the power supply coil 11 in the Y-axis direction.
  • the guide part 27 connected to the power supply coil 11 moves along the guide rod 26 to move the power supply coil 11 in the Y-axis direction in a horizontal posture.
  • the rotation of the X-axis servo motor 22A and the Y-axis servo motor 22B can be controlled by the position detection controller 14 to move the power supply coil 11 in the X-axis direction and the Y-axis direction.
  • the charging stand of the present invention does not specify the moving mechanism as the above mechanism. This is because any mechanism that can move the power supply coil in the X-axis direction and the Y-axis direction can be used as the moving mechanism.
  • an actuator such as a stepping motor may be used instead of the servo motor.
  • the charging base moving mechanism is not specified as a mechanism for moving the power supply coil in the X-axis direction and the Y-axis direction.
  • the charging stand may be structured such that a linear guide wall is provided on the charging surface and the battery drive device is placed along the guide wall so that the power supply coil can be moved linearly along the guide wall.
  • this charging stand is not shown, the power supply coil can be moved linearly along the guide wall as a moving mechanism that can move the power supply coil only in one direction, for example, the X-axis direction.
  • the position detection controller 14 detects the position of the battery-powered device 50 placed on the charging surface 21.
  • the position detection controller 14 of FIGS. 7 to 9 detects the position of the induction coil 51 built in the battery-powered device 50 and causes the power supply coil 11 to approach the induction coil 51.
  • the position detection controller 14 includes a first position detection controller 14A that roughly detects the position of the induction coil 51, and a second position detection controller 14B that precisely detects the position of the induction coil 51.
  • the position detection controller 14 roughly detects the position of the induction coil 51 by the first position detection controller 14A, and controls the moving mechanism 13 to bring the position of the power supply coil 11 closer to the induction coil 51.
  • the moving mechanism 13 is controlled while accurately detecting the position of the induction coil 51 by the second position detection controller 14B, so that the position of the power supply coil 11 is brought close to the induction coil 51 accurately.
  • the charging stand 10 can approach the power coil 11 to the induction coil 51 quickly and more accurately.
  • the first position detection controller 14 ⁇ / b> A includes a plurality of position detection coils 30 fixed to the inner surface of the charging surface 21, and a pulse power supply 31 that supplies a pulse signal to the position detection coil 30.
  • a receiving circuit 32 that receives an echo signal that is excited by a pulse supplied from the pulse power supply 31 to the position detection coil 30 and that is output from the induction coil 51 to the position detection coil 30, and an echo signal that the reception circuit 32 receives And an identification circuit 33 for determining the position of the power supply coil 11. (Position detection coil 30)
  • the position detection coil 30 is pattern-wired on the printed circuit board 37.
  • the position detection coil 30 includes a plurality of rows of coils, and the plurality of position detection coils 30 are fixed to the inner surface of the charging surface 21 at a predetermined interval.
  • the position detection coil 30 includes a plurality of X-axis detection coils 30A that detect the position of the induction coil 51 in the X-axis direction, and a plurality of Y-axis detection coils 30B that detect the position in the Y-axis direction.
  • Each X-axis detection coil 30A has a loop shape elongated in the Y-axis direction, and the plurality of X-axis detection coils 30A are fixed to the inner surface of the charging surface 21 at a predetermined interval.
  • the position detection coil 30 in FIG. 11 is a coil wound in two turns.
  • the position detection coil may be a one-turn coil or a three-turn or more coil.
  • the position detection coil may be a linear coil without being wound in a loop.
  • a pulse signal can be output as a position detection coil.
  • the position detection coil 30 is provided on the upper surface of the printed circuit board 37 in this example in order to reduce the distance from the induction coil 51 and increase the efficiency, but pattern wiring may be provided on the lower surface of the printed circuit board.
  • the interval (d) between the adjacent X-axis detection coils 30A is smaller than the outer diameter (D) of the induction coil 51, and preferably the interval (d) between the X-axis detection coils 30A is equal to the outer diameter (D) of the induction coil 51. 1 times to 1/4 times.
  • the X-axis detection coil 30A can accurately detect the position of the induction coil 51 in the X-axis direction by narrowing the interval (d).
  • Each Y-axis detection coil 30B has a loop shape elongated in the X-axis direction, and the plurality of Y-axis detection coils 30B are fixed to the inner surface of the charging surface 21 at a predetermined interval.
  • the interval (d) between the adjacent Y-axis detection coils 30B is also smaller than the outer diameter (D) of the induction coil 51, and preferably the interval (d) between the Y-axis detection coils 30B is the same as the X-axis detection coil 30A.
  • the outer diameter (D) of the induction coil 51 is 1 to 1/4 times.
  • the Y-axis detection coil 30B can also accurately detect the position of the induction coil 51 in the Y-axis direction by narrowing the interval (d).
  • the position detection coil 30 is a linear wiring line provided on the surface of the printed circuit board 37.
  • the position detection coils 30 are preferably arranged in a matrix. Thus, by arranging the plurality of position detection coils 30 almost uniformly on the charging surface 21, the accuracy of position detection can be maintained constant over the entire charging surface. (Fixed structure of printed circuit board 37)
  • the printed circuit board 37 is fixed in a posture as close as possible to the inner surface of the charging surface 21. Specifically, the printed circuit board 37 is disposed between the charging surface 21 and the moving region of the power supply coil 11 on the back side of the upper case 20 ⁇ / b> A, and is fixed so as to contact the inner surface of the charging surface 21. .
  • This fixing structure will be described with reference to FIGS.
  • the coupling efficiency can be increased by arranging the position detection coil 30 close to the induction coil 51.
  • the power supply coil 11 is positioned on the back side of the printed circuit board 37. If it leaves
  • a structure for fixing the printed circuit board 37 inside the main body case 20 is also required.
  • a boss is provided on the lower case 20B, and a printed circuit board 37X is placed on the boss, and the boss is cut from above.
  • a structure in which the screw 70 is inserted into the formed screw groove and screwed is employed. In this configuration, since the screw head 71 is positioned on the printed circuit board 37X in a screwed state, if the printed circuit board 37X in this state is brought into contact with the inner surface of the upper case 20A, the thickness of the screw head 71 is increased.
  • a gap is generated between the printed circuit board 37X and the inner surface of the upper case 20A by t. Even at a short distance, the coupling efficiency is lowered, so that it is impossible to avoid an increase in detection time and charging time due to a decrease in position detection accuracy and a reduction in efficiency during charging. Furthermore, in this configuration, when the upper case is further fixed to the lower case 20B, a separate screwing operation is required. On the other hand, in order to avoid the adverse effects of such screwing, a configuration in which a printed circuit board is bonded to the inner surface of the upper case using a double-sided tape or the like may be considered, but the mechanical strength is insufficient and the reliability is reduced. There was a problem of being inferior. (Fixed cylinder 41)
  • a fixed cylinder 41 is provided on the upper case 20 ⁇ / b> A side provided with the charging surface 21 among the upper case 20 ⁇ / b> A and the lower case 20 ⁇ / b> B constituting the main body case 20.
  • the fixed cylinder 41 has a screw hole 42 at the tip.
  • the upper case 20A is provided with fixed cylinders 41 at four corners. (Holding cylinder 44)
  • the lower case 20B is provided with a holding cylinder 44 at a position corresponding to the fixed cylinder 41 of the upper case 20A.
  • the holding cylinder 44 is opened to an inner diameter having a size matching the outer periphery of the fixed cylinder 41 so that the outer periphery of the fixed cylinder 41 can be held.
  • the holding cylinder 44 is cylindrical, and the size and shape are set so that the fixed cylinder 41 is fitted into the holding cylinder 44.
  • the present invention is not limited to this configuration, and it is sufficient if the fixed cylinder 41 can be held in a positioned state. For example, it may be configured in two or more arcs.
  • the height of the holding cylinder 44 is designed to be separated from the inner surface side of the charging surface 21 by an amount corresponding to the thickness of the printed circuit board 37 with the fixed cylinder 41 inserted into the holding cylinder 44. Yes. With this configuration, the printed circuit board 37 can be held between the inner surface of the upper case 20A and the holding cylinder edge 45 of the lower case 20B in a state where the upper case 20A and the lower case 20B are joined. (Fixing hole 46)
  • the holding cylinder 44 is provided with a fixing hole 46 in the center thereof, and the fixing hole 46 is opened and exposed on the surface side of the lower case 20B.
  • the fixing hole 46 is sized so that the screw 70 can be inserted. Further, the center axis is aligned so that the fixing hole 46 coincides with the screw hole 42 of the fixing cylinder 41 in a state where the fixing cylinder 41 is inserted into the holding cylinder 44.
  • the fixing hole 46 is opened at a position recessed from the surface of the lower case 20B.
  • a stepped portion 47 is provided around the fixing hole 46.
  • the depth of the stepped portion 47 is formed larger than the screw head 71.
  • a partition wall is provided around the fixing hole 46 in order to configure the stepped portion 47, and the holding cylinder 44 is configured by surrounding the fixing hole 46 and extending the partition wall.
  • stepped portion 47 is covered with a cap 72 as shown in FIG. 2 after the screw 70 is screwed, so that a situation in which the screw head 71 is exposed from the main body case 20 is avoided. (Cylinder hole 38)
  • the printed circuit board 37 has a cylindrical hole 38 into which the fixed cylinder 41 can be inserted.
  • the printed circuit board 37 is printed from the opening surface side of the upper case 20A as shown in FIG.
  • the lower case 20B is joined to the upper case 20A in a state of being inserted and positioned in the cylindrical hole 38 of the substrate 37.
  • the fixed cylinder 41 protruding from the cylinder hole 38, it is inserted into the holding cylinder 44 of the lower case 20B, and the lower case 20B is positioned with the upper case 20A. Join to the state.
  • the screw 70 is inserted into the screw hole 42 of the fixed cylinder 41 from the fixing hole 46 of the lower case 20B and screwed.
  • the screw 70 may be a rivet, a pin, a wood screw, a nail or the like instead of a screw having a thread groove.
  • These fixing members are generically referred to as “screws” in this specification.
  • a position detection coil 30 is mounted on the printed circuit board 37 as a circuit pattern.
  • the screw head 71 is not interposed between the printed circuit board 37 and the charging surface 21 by inserting the screw 70 in the reverse direction, and is wasted between the printed circuit board 37 and the charging surface 21. Generation of a gap can be avoided, and the distance between the position detection coil 30 or the power supply coil 11 and the induction coil 51 can be shortened to increase the coupling efficiency.
  • the printed circuit board 37 is positioned by the cylindrical hole 38. Furthermore, since the structure for fixing the printed circuit board 37 inside the main body case 20 and the structure for fixing the upper case 20A and the lower case 20B can be made common, the number of necessary parts such as the number of screws can be reduced and the number of manufacturing steps can be reduced. And cost reduction can be achieved. In particular, as shown in FIG.
  • the holding cylinder edge 45 is pressed and held from the lower surface and the upper surface of the upper case 20A from the upper surface. Therefore, there is no need to screw the printed circuit board 37 directly to the lower case 20B as in the prior art, and the number of manufacturing steps can be reduced and the fixing structure can be simplified.
  • the upper case 20A and the lower case 20B can be fixed by screwing together with the printed circuit board 37 while the printed circuit board 37 is in contact with the inner surface of the charging surface 21 of the upper case 20A. That is, the upper case 20A and the lower case 20B can be sandwiched between the upper case 20A and the lower case 20B without being screwed directly to the printed circuit board 37, and the upper case 20A and the lower case 20B can be fixed at the same time. As a result, cost and manufacturing man-hours can be reduced. Moreover, since the screw 70 is inserted from the lower case 20B side, it cannot be exposed from the upper surface of the main body case 20, and the external appearance of a charging stand can also be made clear.
  • contacting means pressing the printed circuit board 37 against the back side of the charging surface, but does not prevent a slight gap from being generated due to manufacturing tolerances.
  • the edge of the printed circuit board 37 is cut out as described above, and the rib 43 is provided at a position corresponding to the cutout 39 on the inner surface of the upper case 20A.
  • Positioning is realized by configuring the ribs 43 to be fitted into the notches 39 in a state where the printed circuit board 37 is mounted on the inner surface of the upper case 20A.
  • Such a cutout 39 is preferably provided at a portion other than the cylindrical hole 38.
  • the charging stand 10 detects the position of the induction coil 51 such as a battery pack placed on the charging stand 10 by the position detection coil 30. At this time, if the position detection coil 30 is disposed so as to overlap the power supply coil 11, the radio wave is shielded. For example, when a mobile phone is used as the battery-driven device 50, the mobile phone is difficult to receive the radio wave. It may be in such a state. In addition, the detection sensitivity may be reduced. Therefore, in order to avoid such a situation, when the position detection coil 30 detects the position of the power supply coil 11, an extra coil, that is, the power supply coil 11, does not interfere with the position detection coil 30. It is preferable to retreat to a position where it does not become.
  • the retracted position of the power supply coil 11 is a position that does not overlap with the position detection coil 30, for example, a corner of the charging surface 21 or a portion other than the charging surface 21.
  • the moving mechanism 13 can move the power supply coil 11 not only inside the charging surface 21 but also outside the charging surface 21, so that when detecting the position of the induction coil 51, When the position of the induction coil 51 is specified and charging is started while the power supply coil 11 is moved to such a retracted position to avoid the above-described problem, the moving mechanism 13 is again connected to the power supply coil 11. The charging surface 21 is moved to a predetermined position.
  • Such a position is also preferably a standby position of the power supply coil 11, that is, an initial position where the power supply coil 11 waits when charging is not performed.
  • a standby position of the power supply coil 11 that is, an initial position where the power supply coil 11 waits when charging is not performed.
  • the position of the induction coil 51 can be detected smoothly and the subsequent power coil can be evacuated to the standby position in advance without moving the power coil 11 to the predetermined waiting position at the time of position detection. 11 moving operations can be carried out.
  • the power supply coil 11 is returned to the initial position, that is, the retracted position to prepare for the next charging.
  • Such a standby position or a standby position is preferably at the corner of the charging surface 21 or outside the charging surface 21.
  • the position detection coil can be omitted by substituting the power supply coil for the position detection coil. That is, at the time of position detection, a signal is transmitted from the power supply coil 11 to the induction coil 51 while changing the position of the power supply coil 11 by the moving means, and the position of the induction coil 51 is detected by the echo.
  • the position detection coil can be omitted and the configuration can be simplified, and the presence of the position detection coil can also avoid the situation in which the reception sensitivity of the radio wave receiving device such as a mobile phone placed on the charging stand is deteriorated. It is done.
  • the second position detection controller 14B fine adjustment is further performed by the second position detection controller 14B to bring the power supply coil 11 closer to the induction coil 51.
  • the method is not limited to this method.
  • the power supply coil 11 can be brought closer to the induction coil 51 without fine adjustment.
  • the position detection controller 64 supplies a plurality of position detection coils 30 fixed to the inner surface of the charging surface and pulse signals to the position detection coils 30.
  • a pulse power supply 31 that receives the echo signal that is excited by a pulse supplied from the pulse power supply 31 to the position detection coil 30 and that is output from the induction coil 51 to the position detection coil 30, and the reception circuit 32 And an identification circuit 73 for determining the position of the power supply coil 11 from the echo signal received. Furthermore, the position detection controller 64 pulses the position detection coil 30 to the discrimination circuit 73, as shown in FIG. 18, the level of the echo signal induced in each position detection coil 30 with respect to the position of the induction coil 51.
  • a storage circuit 77 is provided for storing the level of an echo signal that is induced by a signal and is induced after a predetermined time has elapsed.
  • the position detection controller 64 detects the level of the echo signal induced in each position detection coil 30, compares the level of the detected echo signal with the level of the echo signal stored in the storage circuit 77, and The position of the induction coil 51 is detected. According to this configuration, the power supply coil 11 can be brought close to the induction coil 51 by the moving mechanism 13 without performing fine adjustment.
  • the position detection controller 64 obtains the position of the induction coil 51 from the level of the echo signal induced in each position detection coil 30 as follows.
  • the position detection coil 30 shown in FIG. 16 includes a plurality of Y axis detection coils 30 that detect the position of the induction coil 51 in the Y axis direction, and the plurality of position detection coils 30 are fixed to the inner surface of the charging surface 21 at predetermined intervals. is doing.
  • Each Y-axis detection coil 30 has a loop shape elongated in the X-axis direction.
  • FIG. 17 shows the level of the echo signal induced by the Y-axis position detection coil 30 in a state where the induction coil 51 is moved in the Y-axis direction
  • the horizontal axis shows the position of the induction coil 51 in the Y-axis direction
  • the vertical axis indicates the level of the echo signal induced in each Y-axis position detection coil 30.
  • the position detection controller 64 can determine the position of the induction coil 51 in the Y-axis direction by detecting the level of the echo signal induced in each Y-axis position detection coil 30. As shown in this figure, when the induction coil 51 is moved in the Y-axis direction, the level of the echo signal induced in each Y-axis position detection coil 30 changes.
  • the center of the induction coil 51 is at the center of the first Y-axis position detection coil 30, the level of the echo signal induced by the first Y-axis position detection coil 30, as shown by the point A in FIG. Is the strongest. Further, when the induction coil 51 is in the middle between the first Y-axis position detection coil 30 and the second Y-axis position detection coil 30, the first Y-axis position detection coil 30 is indicated by a point B in FIG. And the level of the echo signal induced in the second Y-axis position detection coil 30 is the same.
  • each Y-axis position detection coil 30 the level of the echo signal that is induced when the induction coil 51 is closest is the strongest, and the level of the echo signal decreases as the induction coil 51 moves away. Therefore, it can be determined which Y-axis position detection coil 30 is closest to the induction coil 51 based on which Y-axis position detection coil 30 has the strongest echo signal level. In addition, when an echo signal is induced in the two Y-axis position detection coils 30, the echo signal is induced in the Y-axis position detection coil 30 in which direction from the Y-axis position detection coil 30 that detects a strong echo signal.
  • the induction coil 51 can be determined in which direction the induction coil 51 is displaced from the Y-axis position detection coil 30 having the strongest echo signal, and the relative position between the two Y-axis position detection coils 30 can be determined by the level ratio of the echo signal. Can be judged. For example, if the level ratio of the echo signals of the two Y-axis position detection coils 30 is 1, it can be determined that the induction coil 51 is located at the center of the two Y-axis position detection coils 30.
  • the identification circuit 73 stores in the storage circuit 77 the level of the echo signal induced in each Y-axis position detection coil 30 with respect to the position of the induction coil 51 in the Y-axis direction.
  • the identification circuit 73 detects that the induction coil 51 is mounted by an echo signal that is guided to the Y-axis position detection coil 30, that is, that the battery built-in device 50 is mounted on the charging stand 10. Further, the level of the echo signal induced in any one of the Y-axis position detection coils 30 can be compared with the level stored in the storage circuit 77 to determine the position of the induction coil 51 in the Y-axis direction.
  • the identification circuit stores in the storage circuit a function that specifies the position of the induction coil in the Y-axis direction from the level ratio of the echo signal induced in the adjacent Y-axis position detection coil, and determines the position of the induction coil from this function. You can also This function is obtained by moving the induction coil between the two Y-axis position detection coils and detecting the level ratio of the echo signal induced in each Y-axis position detection coil.
  • the discriminating circuit 73 detects the level ratio of the echo signals induced in the two Y-axis position detection coils 30, and the induction between the two Y-axis position detection coils 30 based on this function from the detected level ratio.
  • the position of the coil 51 in the Y-axis direction can be calculated and detected.
  • the pulse power supply 31 outputs a pulse signal to the position detection coil 30 at a predetermined timing.
  • the position detection coil 30 to which the pulse signal is input excites the induction coil 51 that approaches with the pulse signal.
  • the excited induction coil 51 outputs an echo signal to the position detection coil 30 with the energy of the flowing current. Therefore, as shown in FIG. 18, the position detection coil 30 near the induction coil 51 induces an echo signal from the induction coil 51 with a predetermined time delay after the pulse signal is input.
  • the echo signal induced in the position detection coil 30 is output to the identification circuit 33 by the reception circuit 32. Therefore, the identification circuit 33 determines whether or not the induction coil 51 is approaching the position detection coil 30 using the echo signal input from the reception circuit 32. When echo signals are induced in the plurality of position detection coils 30, the identification circuit 33 determines that the position detection coil 30 with the highest echo signal level is closest.
  • the position detection controller 14 shown in FIG. 11 connects each position detection coil 30 to the reception circuit 32 via the switching circuit 34. Since this position detection controller 14 switches the input in order and connects it to the plurality of position detection coils 30, it is possible to detect the echo signals of the plurality of position detection coils 30 with one receiving circuit 32. However, an echo signal can also be detected by connecting a receiving circuit to each position detection coil.
  • the position detection controller 14 of FIG. 11 connects the plurality of position detection coils 30 in order with the switching circuit 34 controlled by the identification circuit 33 and connects to the receiving circuit 32.
  • the pulse power supply 31 is connected to the output side of the switching circuit 34 and outputs a pulse signal to the position detection coil 30.
  • the level of the pulse signal output from the pulse power supply 31 to the position detection coil 30 is extremely higher than the echo signal from the induction coil 51.
  • the receiving circuit 32 has a limiter circuit 35 made of a diode connected to the input side.
  • the limiter circuit 35 limits the signal level of the pulse signal input from the pulse power supply 31 to the reception circuit 32 and inputs the pulse signal to the reception circuit 32.
  • An echo signal having a low signal level is input to the receiving circuit 32 without being limited.
  • the receiving circuit 32 amplifies and outputs both the pulse signal and the echo signal.
  • the echo signal output from the receiving circuit 32 is a signal delayed from the pulse signal by a predetermined timing, for example, several ⁇ sec to several hundred ⁇ sec. Since the delay time that the echo signal is delayed from the pulse signal is a fixed time, a signal after a predetermined delay time from the pulse signal is used as an echo signal, and the induction coil 51 approaches the position detection coil 30 from the level of this echo signal. Determine whether or not.
  • the receiving circuit 32 is an amplifier that amplifies and outputs an echo signal input from the position detection coil 30.
  • the receiving circuit 32 outputs a pulse signal and an echo signal.
  • the identification circuit 33 determines whether or not the induction coil 51 is set close to the position detection coil 30 from the pulse signal and echo signal input from the reception circuit 32.
  • the identification circuit 33 includes an A / D converter 36 that converts a signal input from the reception circuit 32 into a digital signal.
  • the digital signal output from the A / D converter 36 is calculated to detect an echo signal.
  • the identification circuit 33 detects a signal input after a specific delay time from the pulse signal as an echo signal, and further determines whether the induction coil 51 is approaching the position detection coil 30 from the level of the echo signal.
  • the identification circuit 33 detects the position of the induction coil 51 in the X-axis direction by controlling the switching circuit 34 so that the plurality of X-axis detection coils 30A are sequentially connected to the reception circuit 32. Each time the identification circuit 33 connects each X-axis detection coil 30A to the reception circuit 32, the identification circuit 33 outputs a position detection signal to the X-axis detection coil 30A connected to the reception circuit 32, and a specific delay from the position detection signal. Whether or not the induction coil 51 is approaching the X-axis detection coil 30A is determined based on whether or not an echo signal is detected after time.
  • the identification circuit 33 connects all the X-axis detection coils 30A to the reception circuit 32, and determines whether or not the induction coil 51 is close to each X-axis detection coil 30A.
  • the identification circuit 33 can detect the position of the induction coil 51 in the X-axis direction from the X-axis detection coil 30A that can detect an echo signal.
  • echo signals are detected from the plurality of X-axis detection coils 30A.
  • the identification circuit 33 determines that it is closest to the X-axis detection coil 30A from which the strongest echo signal, that is, the echo signal having a high level is detected.
  • the identification circuit 33 similarly controls the Y-axis detection coil 30B to detect the position of the induction coil 51 in the Y-axis direction.
  • the identification circuit 33 controls the moving mechanism 13 from the detected X-axis direction and Y-axis direction positions to move the power supply coil 11 to a position approaching the induction coil 51.
  • the identification circuit 33 controls the X-axis servomotor 22A of the moving mechanism 13 to move the power supply coil 11 to the position of the induction coil 51 in the X-axis direction.
  • the Y-axis servomotor 22B of the moving mechanism 13 is controlled to move the power supply coil 11 to the position of the induction coil 51 in the Y-axis direction.
  • the first position detection controller 14 ⁇ / b> A moves the power supply coil 11 to a position approaching the induction coil 51.
  • the charging stand 10 charges the battery pack by transferring power from the power supply coil 11 to the induction coil 51 after the power supply coil 11 approaches the induction coil 51 by the first position detection controller 14A. Can do.
  • the charging stand can further accurately control the position of the power supply coil to approach the induction coil, and then carry the power to charge the battery pack.
  • the power supply coil 11 is brought closer to the induction coil 51 more accurately by the second position detection controller 14B.
  • the second position detection controller 14B controls the moving mechanism 13 by accurately detecting the position of the power supply coil 11 from the oscillation frequency of the self-excited oscillation circuit using the AC power supply 12 as a self-excited oscillation circuit.
  • the second position detection controller 14B controls the X-axis servo motor 22A and the Y-axis servo motor 22B of the moving mechanism 13 to move the power supply coil 11 in the X-axis direction and the Y-axis direction. Detect the oscillation frequency.
  • FIG. 19 shows the characteristic that the oscillation frequency of the self-excited oscillation circuit changes. This figure shows changes in the oscillation frequency with respect to the relative displacement between the power supply coil 11 and the induction coil 51.
  • the oscillation frequency of the self-excited oscillation circuit is highest at the position where the power supply coil 11 is closest to the induction coil 51, and the oscillation frequency is lowered as the relative position is shifted. Therefore, the second position detection controller 14B controls the X-axis servomotor 22A of the moving mechanism 13 to move the power supply coil 11 in the X-axis direction, and stops at the position where the oscillation frequency becomes the highest.
  • the Y-axis servo motor 22B is similarly controlled to move the power supply coil 11 in the Y-axis direction and stop at the position where the oscillation frequency becomes the highest.
  • the second position detection controller 14B can move the power supply coil 11 to the position closest to the induction coil 51 as described above.
  • the charging stand 10 supplies AC power to the power supply coil 11 with the AC power supply 12 in a state where the position detection controller 14 controls the moving mechanism 13 to bring the power supply coil 11 close to the induction coil 51.
  • the AC power of the power supply coil 11 is transferred to the induction coil 51 and used to charge the battery cell 52.
  • the position detection controller 14 shown in FIG. 18 includes a detection circuit 17 that detects battery information conveyed from the battery drive device 50.
  • the detection circuit 17 charges the battery cell 52 by controlling the voltage and current for charging the battery cell 52 based on the battery information transmitted from the battery drive device 50.
  • the full charge of the battery cell 52 is transmitted from the battery driving device 50 as battery information. Therefore, the detection circuit 17 detects the full charge of the battery cell 52 from the battery information transmitted from the battery drive device 50, stops the supply of AC power to the power supply coil 11, and ends the charging.
  • the second position detection controller 14B determines the relative position of the power supply coil 11 and the induction coil 51 from the change in the oscillation frequency of the self-excited oscillation circuit.
  • the method of detecting the position of the power supply coil and controlling the moving mechanism is not limited to this method, and various methods can be used.
  • the second position detection controller that finely adjusts the relative position between the power supply coil and the induction coil is a voltage of the power supply coil, power consumption of an AC power supply that supplies power to the power supply coil, or current induced in the induction coil.
  • the relative position of the power supply coil to the induction coil can be detected. Since the second position detection controller does not need to change the oscillation frequency, it can be a separately-excited oscillation circuit.
  • the second position detection controller 14 ⁇ / b> C that detects the relative position of the power supply coil 11 with respect to the induction coil 51 from the voltage of the power supply coil 11 uses the AC voltage generated in the power supply coil 11.
  • a voltage detection circuit 83 that rectifies and converts the voltage into a DC voltage and detects the voltage is incorporated.
  • the second position detection controller 14 ⁇ / b> C moves the power supply coil 11 and detects the voltage of the power supply coil 11 with the voltage detection circuit 83.
  • the characteristic that the voltage of the power supply coil 11 changes with respect to the relative position of the power supply coil 11 and the induction coil 51 is shown in FIG.
  • This figure shows a change in the voltage of the power supply coil 11 with respect to the relative displacement between the power supply coil 11 and the induction coil 51.
  • the voltage of the power supply coil 11 is the lowest at the position where the power supply coil 11 is closest to the induction coil 51, and the voltage is increased as the relative position is shifted. Therefore, the second position detection controller 14C controls the X-axis servomotor 22A of the moving mechanism 13 to move the power supply coil 11 in the X-axis direction, and stops at a position where the voltage of the power supply coil 11 is lowest.
  • the Y-axis servo motor 22B is similarly controlled to move the power coil 11 in the Y-axis direction and stop at a position where the voltage of the power coil 11 is lowest.
  • the second position detection controller 14 ⁇ / b> C can move the power supply coil 11 to the position closest to the induction coil 51.
  • the second position detection controller 14 ⁇ / b> C that detects the relative position of the power supply coil 11 with respect to the induction coil 51 from the power consumption of the AC power supply 82 that supplies power to the power supply coil 11 uses the power consumption of the AC power supply 82.
  • a power consumption detection circuit 84 for detection is incorporated.
  • the second position detection controller 14 ⁇ / b> C moves the power supply coil 11 and detects the power consumption of the AC power supply 82 by the power consumption detection circuit 84.
  • the characteristic that the power consumption of the AC power supply 82 changes with respect to the relative position of the power supply coil 11 and the induction coil 51 is shown in FIG.
  • This figure shows a change in the power consumption of the AC power supply 82 with respect to the relative displacement between the power supply coil 11 and the induction coil 51.
  • the power consumption of the AC power supply 82 is the smallest at the position where the power supply coil 11 is closest to the induction coil 51, and the power consumption is increased as the relative position is shifted. Therefore, the second position detection controller 14C controls the X-axis servomotor 22A of the moving mechanism 13 to move the power supply coil 11 in the X-axis direction, and stops at a position where the power consumption of the AC power supply 82 is minimized. .
  • the Y-axis servo motor 22B is similarly controlled to move the power supply coil 11 in the Y-axis direction and stop at a position where the power consumption of the AC power supply 82 is lowest.
  • the second position detection controller 14 ⁇ / b> C can move the BR> A power supply coil 11 to the position closest to the induction coil 51.
  • the second position detection controller 14 ⁇ / b> C that detects the relative position of the power supply coil 11 with respect to the induction coil 51 from the current of the induction coil 51 incorporates a circuit that detects the current of the induction coil 51.
  • the second position detection controller 14C includes a transmission circuit 95 that modulates a carrier wave with a current detected by detecting the current of the induction coil 51 on the battery built-in device 90 side and wirelessly transmits it to the charging base 80, and the transmission circuit 95 is provided with a receiving circuit 85 that receives the signal transmitted from 95 on the charging stand 80 side, demodulates the signal, and detects the current of the induction coil 51.
  • the second position detection controller 14 ⁇ / b> C detects the current of the induction coil 51 by moving the power supply coil 11.
  • FIG. 23 shows the characteristic that the current of the induction coil 51 changes with respect to the relative position of the power supply coil 11 and the induction coil 51. This figure shows the change of the induction coil 51 with respect to the relative displacement between the power supply coil 11 and the induction coil 51. As shown in this figure, the current of the induction coil 51 becomes the largest at the position where the power supply coil 11 is closest to the induction coil 51, and the current becomes smaller as the relative position is shifted.
  • the second position detection controller 14C controls the X-axis servomotor 22A of the moving mechanism 13 to move the power supply coil 11 in the X-axis direction, and stops at the position where the current of the induction coil 51 becomes the largest.
  • the Y-axis servo motor 22B is similarly controlled to move the power supply coil 11 in the Y-axis direction and stop at a position where the current of the induction coil 51 becomes the largest.
  • the second position detection controller 14C can move the power supply coil 11 to the position closest to the induction coil 51 as described above.
  • the above moving mechanism 13 moves the power supply coil 11 in the X-axis direction and the Y-axis direction to move the power supply coil 11 to a position closest to the induction coil 51.
  • the moving mechanism is in the X-axis direction.
  • the power coil is moved in the Y-axis direction and the position of the power coil is not specified as a structure for approaching the induction coil, and the power coil can be moved in various directions to approach the induction coil.
  • the present invention is not limited to this example.
  • the position where the battery drive device is installed is guided using a magnet or the like.
  • the present invention can also be applied to a structure that is mechanically defined by a guide member or the like for guiding the placement position.
  • the charging stand according to the present invention can be suitably used not only for charging a mobile phone or a portable music player but also for charging an assist bicycle or an electric vehicle.
  • Fixing hole 47 ... Stepped portion 48 Flexible substrates 50 and 50X ... Battery drive devices 51 and 51X ... Inductive coil 52 ... Secondary battery 53 ... capacitor 54 ... resonant circuit 55 ... diode 56 ... smoothing capacitor 57 ... rectifier circuit 58 ... charge control circuits 59A, 59B ... guide rods 60A, 60B ... pinion gear 61 ... servo motor 62 ... lead screw 63A, 63B ... worm wheel 64 ... Position detection controller 66 ... slide member 66A ... X slide part 66B ... Y slide part 66a ... plate 70 ... Screw 71 ... Screw head 72 ... Cap 73 ... Identification circuit 77 ... Memory circuit 80 ... Charging stand 82 ... AC power supply 83 ... Voltage detection circuit 84 ... Power consumption detection circuit 85 ... Reception circuit 90 ... Battery built-in device 95 ... Transmitter circuit BP ... Battery pack t ... Screw head thickness

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne une plateforme de chargement en énergie qui permet de disposer et de fixer une bobine de détection de position dans une position optimale et qui présente : une bobine de source d'énergie (11) qui est incorporée à l'intérieur du boîtier principal (20) et disposée sur la surface intérieure d'une surface de chargement en énergie (21), de sorte que lorsqu'un bloc-batterie ou un dispositif alimenté par batterie ayant un bloc-batterie installé (50) est monté sur la surface de chargement en énergie (21), la bobine source d'énergie (11) soit orientée de façon à faire face au côté d'une bobine d'induction circulaire (51), qui est disposée dans le bloc-batterie, afin de permettre un couplage électromagnétique entre la bobine source d'énergie (11) et la bobine d'induction (51); un mécanisme de déplacement (13) pour déplacer la bobine source d'énergie (11) à la portée de la surface de chargement en énergie (21); un circuit de transmission d'énergie pour distribuer de l'énergie électrique à la bobine source d'énergie (11); une pluralité de bobines de détection de position (30) afin de détecter la position de la bobine d'induction (51) et disposées de façon à affleurer la surface de chargement en énergie (21); une carte de circuit imprimé (37) câblée avec les bobines de détection de position (30) et disposée à l'intérieur du boîtier principal (20) entre la surface de chargement en énergie (21) et la région de déplacement du mécanisme de déplacement (13) de la bobine source d'énergie (11), et maintenue en contact avec la surface de chargement en énergie (21).
PCT/JP2011/078557 2010-12-15 2011-12-09 Plateforme de chargement en énergie WO2012081519A1 (fr)

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EP2876772A1 (fr) 2013-10-28 2015-05-27 Panasonic Corporation Appareil de transmission d'énergie et système de transmission d'énergie sans fil
EP3163590A1 (fr) * 2015-10-27 2017-05-03 Continental Automotive GmbH Dispositif de positionnement de bobine
US9705338B2 (en) 2013-10-29 2017-07-11 Panasonic Corporation Wireless power transmission apparatus and wireless power transfer system
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JPWO2014024480A1 (ja) * 2012-08-08 2016-07-25 パナソニックＩｐマネジメント株式会社 無接点充電装置と、そのプログラム、およびそれを用いた自動車
WO2014024480A1 (fr) * 2012-08-08 2014-02-13 パナソニック株式会社 Dispositif de charge sans fil, son programme et véhicule automobile le mettant en œuvre
US9859730B2 (en) 2013-06-13 2018-01-02 Panasonic Intellectual Property Management Co., Ltd. Mobile terminal charger and vehicle equipped with same
WO2014199638A1 (fr) * 2013-06-13 2014-12-18 パナソニックＩｐマネジメント株式会社 Chargeur de terminal mobile et véhicule équipé de celui-ci
JPWO2014199638A1 (ja) * 2013-06-13 2017-02-23 パナソニックＩｐマネジメント株式会社 携帯端末充電装置と、それを用いた自動車
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JP2015053794A (ja) * 2013-09-06 2015-03-19 ローム株式会社 位置ずれ検出装置および電子機器
US10075029B2 (en) 2013-09-06 2018-09-11 Rohm Co., Ltd. Position misalignment detection device and electronic apparatus
US9866033B2 (en) 2013-10-28 2018-01-09 Panasonic Corporation Power transmission apparatus and wireless power transmission system
EP2876772A1 (fr) 2013-10-28 2015-05-27 Panasonic Corporation Appareil de transmission d'énergie et système de transmission d'énergie sans fil
US10277038B2 (en) 2013-10-28 2019-04-30 Panasonic Corporation Power transmission apparatus and wireless power transmission system
US9853457B2 (en) 2013-10-29 2017-12-26 Panasonic Corporation Wireless power transmission apparatus and wireless power transmission system
US9705338B2 (en) 2013-10-29 2017-07-11 Panasonic Corporation Wireless power transmission apparatus and wireless power transfer system
US9997930B2 (en) 2013-10-29 2018-06-12 Panasonic Corporation Wireless power transmission apparatus and wireless power transfer system
EP3163590A1 (fr) * 2015-10-27 2017-05-03 Continental Automotive GmbH Dispositif de positionnement de bobine
WO2019151445A1 (fr) 2018-02-02 2019-08-08 ダイキン工業株式会社 Appareil électronique
KR20200105685A (ko) 2018-02-02 2020-09-08 다이킨 고교 가부시키가이샤 전자 기기
WO2019179850A1 (fr) * 2018-03-19 2019-09-26 Panasonic Automotive Systems Europe Gmbh Dispositif de charge sans fil

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