WO2023234369A1 - 充電装置 - Google Patents

充電装置 Download PDF

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Publication number
WO2023234369A1
WO2023234369A1 PCT/JP2023/020347 JP2023020347W WO2023234369A1 WO 2023234369 A1 WO2023234369 A1 WO 2023234369A1 JP 2023020347 W JP2023020347 W JP 2023020347W WO 2023234369 A1 WO2023234369 A1 WO 2023234369A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
coil
detection
power transmission
unit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2023/020347
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
惇平 岩佐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2024524923A priority Critical patent/JPWO2023234369A1/ja
Priority to CN202380043156.5A priority patent/CN119278564A/zh
Priority to DE112023002501.0T priority patent/DE112023002501T5/de
Publication of WO2023234369A1 publication Critical patent/WO2023234369A1/ja
Priority to US18/958,864 priority patent/US20250088044A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—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—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • 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—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries

Definitions

  • the present disclosure relates to a charging device.
  • the power transmission coil starts moving toward the placement position of the terminal device, and wireless charging is started from the power transmission coil toward the terminal device.
  • wireless charging may be started unconditionally. Therefore, in the conventional technology, even if the terminal device is placed in a position where wireless charging is difficult, the power transmission coil may be moved or wireless charging may be started, resulting in increased power consumption.
  • the voltage value of the power transmission coil is compared with a predetermined constant value, and charging is started when it is determined that the voltage value is in an appropriate state.
  • it is assumed that communication between the power transmission coil and the terminal device is possible, and the effect is limited when the terminal device is placed in a position where wireless charging communication is difficult. In some cases, it was difficult to achieve this goal.
  • An object of the present disclosure is to provide a charging device that can save power.
  • a charging device is a charging device that wirelessly charges a terminal device that includes a power receiving unit that is placed on a mounting surface and receives wirelessly transmitted power.
  • the charging device includes a power transmission coil, a power transmission control section, a detection coil, a signal output section, a signal detection section, and a determination section.
  • the power transmission coil transmits power to the terminal device.
  • the power transmission control unit causes the power transmission coil to transmit power.
  • the detection coil detects the placement position of the terminal device on the placement surface.
  • the signal output section outputs a first signal for generating a detection magnetic field to the detection coil.
  • the signal detection unit detects an echo signal sent from the terminal device to the detection coil in response to the detection magnetic field.
  • the determination unit determines whether or not the terminal device exists within an estimated chargeable range by the power transmission coil, based on the detection result of the echo signal.
  • FIG. 1 is a diagram showing an example of a schematic configuration of a charging system according to an embodiment.
  • FIG. 2 is a hardware configuration diagram of an example of the control section.
  • FIG. 3 is a block diagram showing an example of the configuration of the charging device.
  • FIG. 4 is an explanatory diagram of an example of the detection coil of the embodiment.
  • FIG. 5 is a diagram showing an example of a pulse signal and an echo signal.
  • FIG. 6 is a schematic diagram showing an example of the positional relationship between the estimated chargeable range and the terminal device.
  • FIG. 7 is a diagram showing an example of an echo signal detection result.
  • FIG. 8 is a flowchart showing an example of the flow of charging processing according to the embodiment.
  • FIG. 9 is a flowchart showing an example of the flow of conventional charging control.
  • FIG. 10A is an explanatory diagram of an example of the effect of the charging device of this embodiment.
  • FIG. 10B is an explanatory diagram of an example of the effect of the charging device of this embodiment.
  • FIG. 11 is a flowchart illustrating an example of the flow of charging processing according to the embodiment.
  • FIG. 12A is an explanatory diagram of an example of the effect of the charging device of this embodiment.
  • FIG. 12B is an explanatory diagram of an example of the effect of the charging device of this embodiment.
  • FIG. 13 is a flowchart illustrating an example of the flow of charging processing according to the embodiment.
  • FIG. 14 is a block diagram showing an example of the configuration of a modified charging device.
  • FIG. 1 is a diagram showing an example of a schematic configuration of a charging system 1 according to the present embodiment.
  • the charging system 1 includes a charging device 10A and a terminal device 20.
  • the charging device 10A is an example of the charging device 10.
  • the charging device 10 is a device that wirelessly charges a terminal device 20 that includes a battery 24.
  • Wireless charging means charging wirelessly.
  • wireless charging means charging by magnetic induction an example in which wireless charging means charging by magnetic induction will be described.
  • the terminal device 20 is a device with a built-in battery 24.
  • the terminal device 20 is, for example, a smartphone, a tablet terminal, an audio player, a mobile phone, or the like.
  • the terminal device 20 includes at least a power receiving section 22 and a battery 24.
  • the power receiving unit 22 is a mechanism that receives power wirelessly transmitted from the charging device 10A.
  • the power receiving unit 22 is, for example, an inductive coil that is electromagnetically coupled to a power transmitting coil 30 of a charging device 10A, which will be described later.
  • the battery 24 is charged by the electric power induced into the power receiving section 22 .
  • the housing 12 of the charging device 10A is provided with a mounting surface 12A.
  • the placement surface 12A is a surface on which the terminal device 20 to be wirelessly charged is placed.
  • the mounting surface 12A is a part of the outer surface of the housing 12 and is a two-dimensional planar region.
  • the mounting surface 12A is a two-dimensional plane along a plane defined by a first direction and a second direction orthogonal to the first direction. Further, as shown in FIG. 1, the description will be made assuming that the first direction is the X-axis direction and the second direction is the Y-axis direction.
  • the X-axis direction and the Y-axis direction are directions perpendicular to each other along the two-dimensional plane of the mounting surface 12A.
  • the Z-axis direction which is orthogonal to the X-axis direction and the Y-axis direction, will be described as coinciding with the thickness direction of the housing 12.
  • a power transmission coil 30, a movement mechanism 34, a detection coil 40, a control unit 50, and the like are provided in the casing 12 of the charging device 10A.
  • the power transmission coil 30 is a coil for transmitting power to the terminal device 20. Specifically, the power transmission coil 30 is a coil for guiding power to the power receiving section 22 of the terminal device 20 placed on the placement surface 12A.
  • the moving mechanism 34 is a mechanism that moves the power transmitting coil 30 along the mounting surface 12A.
  • the moving mechanism 34 includes a drive motor 34A and a drive motor 34B.
  • the drive motor 34A is a motor for moving the power transmission coil 30 along the Y-axis direction.
  • the drive motor 34B is a motor for moving the power transmission coil 30 along the X-axis direction.
  • the drive motor 34A and the drive motor 34B are connected to the support member 32.
  • the support member 32 includes a threaded rod member 32A, a guide rod 32B, a threaded rod member 32C, a guide rod 32D, a nut 32E, a nut 32F, and a nut 32G.
  • the threaded rod member 32A and the guide rod 32B are rod-shaped members extending in the Y-axis direction, and support the power transmission coil 30 via the nut 32G.
  • the threaded rod member 32A and the guide rod 32B have one end in the Y-axis direction connected to the nut 32E, and the other end in the Y-axis direction connected to the nut 32F.
  • One end of the threaded rod member 32A in the Y-axis direction is connected to a drive motor 34A.
  • the nut 32G supporting the power transmission coil 30 moves in the Y-axis direction, which is the direction in which the guide rod 32B extends, and the power transmission coil 30 moves in the Y-axis direction. do.
  • the threaded rod member 32C and the guide rod 32D are rod-shaped members extending in the X-axis direction, and support the nuts 32E and 32F, respectively.
  • One end of the threaded rod member 32C in the extending direction is connected to a nut 32G, and the nut 32G is provided with a drive motor 34B.
  • the nuts 32E and 32F that support the power transmission coil 30 via the threaded rod member 32A and the guide rod 32B are rotated by the threaded rod member 32C and the guide rod 32D. along each in the X-axis direction. Movement of the nuts 32E and 32F in the X-axis direction causes the power transmission coil 30 to move in the X-axis direction.
  • the power transmission coil 30 is configured to be movable in the X-axis direction and the Y-axis direction along the mounting surface 12A by driving the drive motor 34A and the drive motor 34B included in the moving mechanism 34. That is, the power transmission coil 30 is configured to be movable within a movable range 62 along the placement surface 12A by the movement mechanism 34.
  • the movable range 62 is a range in which the power transmission coil 30 can be moved by the moving mechanism 34.
  • the movable range 62 is an area along the two-dimensional plane of the placement surface 12A, and is an area that occupies a part of the placement surface 12A.
  • the moving mechanism 34 may be any mechanism that moves the power transmitting coil 30 along the mounting surface 12A, and is not limited to the configuration shown in FIG. 1.
  • the detection coil 40 is a coil for detecting the placement position of the terminal device 20 on the mounting surface 12A.
  • the arrangement position of the terminal device 20 represents the arrangement position of the power receiving unit 22 provided in the terminal device 20.
  • the arrangement position of the terminal device 20 is represented by the position on the mounting surface 12A.
  • the detection coil 40 is arranged inside the mounting surface 12A along the mounting surface 12A. Details of the detection coil 40 will be described later.
  • the control unit 50 executes information processing in the charging device 10.
  • FIG. 2 is a hardware configuration diagram of an example of the control unit 50.
  • the control unit 50 has a hardware configuration using a normal computer, with a CPU (Central Processing Unit) 11A, a ROM (Read Only Memory) 11B, a RAM 11C, an I/F 11D, etc. connected to each other by a bus 11E. ing.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random Access Memory
  • I/F I/F
  • the CPU 11A is a calculation device that controls the charging device 10A of this embodiment.
  • the ROM 11B stores programs and the like that implement various processes by the CPU 11A.
  • the RAM 11C stores data necessary for various processing by the CPU 11A.
  • the I/F 11D is an interface for transmitting and receiving data.
  • a program for executing information processing executed by the charging device 10A of this embodiment is provided by being pre-installed in the ROM 11B or the like.
  • the program executed by the charging device 10A of this embodiment is a file in a format that can be installed in the charging device 10A or an executable format, and can be stored on a CD-ROM, a flexible disk (FD), a CD-R, or a DVD (Digital Versatile). It may be configured to be recorded and provided on a computer-readable recording medium such as a computer-readable disk.
  • FIG. 3 is a block diagram showing an example of the configuration of the charging device 10A.
  • the charging device 10A includes a power transmission coil 30, a moving mechanism 34, a detection coil 40, an AC power source 42, a selector 44, a signal output section 46, a signal detection section 48, and a control section 50.
  • the detection coil 40 is a coil for detecting the placement position of the terminal device 20 on the mounting surface 12A.
  • FIG. 4 is an explanatory diagram of an example of the detection coil 40 of this embodiment.
  • the sensing coil 40 includes a first sensing coil 40A and a second sensing coil 40B.
  • the first detection coil 40A is a coil for detecting the position of the terminal device 20 in the estimated chargeable range 64 on the mounting surface 12A.
  • the estimated chargeable range 64 is an estimated range in which it is estimated that the terminal device 20 on the mounting surface 12A can be charged.
  • the actual chargeable range of the terminal device 20 on the mounting surface 12A is determined by the movable range 62 of the power transmitting coil 30, the compatibility between the power receiving unit 22 of the terminal device 20 and the power transmitting coil 30, and the like. That is, the actual chargeable range is a range that becomes clear only when the power receiving unit 22 receives power from the power transmitting coil 30. Although it is essential that the actual chargeable range is wider than the movable range 62 of the power transmission coil 30, the maximum range varies depending on the compatibility between the power transmission coil 30 and the power receiving unit 22 of the terminal device 20, etc.
  • the movable range 62 of the power transmitting coil 30 in a two-dimensional plane along the mounting surface 12A is wider than the range in which the power transmitting coil 30 can be moved, and the range is based on the possible relationship between the power transmitting coil 30 and the power receiving unit 22. It is assumed that a range that is estimated to be chargeable is predetermined as an estimated chargeable range 64.
  • the first detection coil 40A is arranged to be able to detect the position of the terminal device 20 placed at least in the estimated chargeable range 64 on the placement surface 12A.
  • the first sensing coil 40A extends in the X-axis direction in a two-dimensional plane along the mounting surface 12A, and has a plurality of first sensing coils extending in the Y-axis direction intersecting the X-axis direction in the two-dimensional plane. Arranged. Moreover, the plurality of first sensing coils 40A are arranged so as to cover at least the entire area corresponding to the estimated chargeable range 64 in the two-dimensional plane along the mounting surface 12A. 4 and 3 show, as an example, a configuration in which four first sensing coils 40A extending in the X-axis direction are arranged along the Y-axis direction. Note that the number of first sensing coils 40A is not limited to four, as long as it is plural.
  • the second detection coil 40B is a coil for detecting the position of the terminal device 20 outside the estimated chargeable range 64 on the mounting surface 12A.
  • the second detection coil 40B is arranged to be able to detect the position of the terminal device 20 placed outside the estimated chargeable range 64 on the placement surface 12A.
  • the second sensing coil 40B extends in the Y-axis direction, and is disposed at both ends of the first sensing coil 40A in the X-axis direction, which is the extending direction. Further, the second sensing coil 40B is arranged so as to selectively cover an area corresponding to the outside of the estimated chargeable range 64 in the two-dimensional plane along the mounting surface 12A.
  • the second sensing coil 40B1 is arranged at one end of the first sensing coil 40A in the X-axis direction
  • the second sensing coil 40B2 is arranged at the other end of the first sensing coil 40A in the X-axis direction.
  • the second sensing coil 40B1 and the second sensing coil 40B2 are examples of the second sensing coil 40B.
  • FIGS. 4 and 3 show, as an example, an example in which the second sensing coil 40B is arranged in an overlapping manner in the Z-axis direction with respect to both ends of the first sensing coil 40A in the extending direction.
  • the second sensing coil 40B may be arranged non-overlappingly at both ends of the first sensing coil 40A in the extending direction.
  • the second sensing coil 40B may be disposed on each of the outer sides of both ends of the first sensing coil 40A in the extending direction along the X-axis direction.
  • the detection range 60 of the terminal device 20 by the sensing coil 40 including the first sensing coil 40A and the second sensing coil 40B is a movable range 62 and a charging range.
  • This range includes the entire range of possible estimation ranges 64 and is wider than these ranges.
  • the first sensing coil 40A and the second sensing coil 40B are electrically connected to each of the signal output section 46 and the signal detection section 48 via the selector 44.
  • the signal output unit 46 outputs a first signal to the detection coil 40 for generating a detection magnetic field.
  • the signal output unit 46 selectively outputs the first signal to a predetermined detection coil 40 by switching the connection of the selector 44 .
  • the first signal is a signal for generating a detection magnetic field from the detection coil 40.
  • the first signal is, for example, a pulse signal.
  • the detection coil 40 When the first signal is input, the detection coil 40 generates a magnetic field for detection.
  • the signal detection unit 48 detects, via the selector 44, an echo signal sent from the terminal device 20 to the detection coil 40 in response to the detection magnetic field generated by the detection coil 40.
  • the signal detection unit 48 selectively detects the echo signal responded to a predetermined detection coil 40 by switching the connection of the selector 44 .
  • the signal detection section 48 outputs the detection result of the echo signal to the control section 50.
  • the control unit 50 includes a placement position specifying unit 50A, a determining unit 50B, a moving mechanism control unit 50C, a communication determining unit 50D, and a power transmission control unit 50E.
  • a part or all of the arrangement position specifying unit 50A, the determining unit 50B, the moving mechanism control unit 50C, the communication determining unit 50D, and the power transmission control unit 50E for example, cause a processing device such as the CPU 11A to execute a program, that is, a software It may be realized by hardware such as an IC (Integrated Circuit), or it may be realized by using a combination of software and hardware.
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 based on the detection result of the signal detection unit 48.
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 based on the level of the echo signal that is the detection result of the signal detection unit 48.
  • FIG. 5 is a diagram showing an example of a pulse signal and an echo signal.
  • the horizontal axis represents time
  • the vertical axis represents signal level.
  • the detection coil 40 generates a detection magnetic field when the first signal, which is a pulse signal, is input.
  • the echo signal excited by the pulse signal and induced from the power receiving unit 22 to the sensing coil 40 after a predetermined time elapses is as follows.
  • the echo signal becomes a predetermined level or higher.
  • an echo signal is excited by the pulse signal and is induced from the power receiving unit 22 to the sensing coil 40 after a predetermined period of time has elapsed. becomes an echo signal below a predetermined level.
  • the arrangement position specifying unit 50A responds to the magnetic field for detection by the first signal output from the signal output unit 46 to at least the first sensing coil 40A, and detects an echo sent from the terminal device 20 to at least the first sensing coil 40A.
  • the placement position is specified based on the signal detection results.
  • the arrangement position specifying unit 50A determines which of the plurality of first sensing coils 40A the echo signal responded to is higher than a predetermined level. Through this determination, the placement position specifying unit 50A specifies the placement position of the terminal device 20 in the estimated chargeable range 64 on the placement surface 12A. Specifically, the arrangement position specifying unit 50A outputs an echo signal having a maximum level and a signal having a predetermined level or higher among the echo signals of each of the plurality of first sensing coils 40A detected by the signal detecting unit 48. The position of the first sensing coil 40A is specified as the location of the terminal device 20. In this embodiment, a plurality of first sensing coils 40A are arranged along the Y-axis direction. Therefore, the arrangement position identifying unit 50A identifies the position in the Y-axis direction on the mounting surface 12A as the arrangement position of the terminal device 20.
  • the determining unit 50B determines whether the terminal device 20 exists within the estimated chargeable range 64 by the power transmitting coil 30 based on the detection result of the echo signal.
  • FIG. 6 is a schematic diagram showing an example of the positional relationship between the estimated chargeable range 64 and the power receiving unit 22 of the terminal device 20.
  • the detection range 60 of the terminal device 20 by the detection coil 40 is wider than the movable range 62 and the estimated chargeable range 64. This is because, from the viewpoint of widening the actual chargeable range as much as possible, it is necessary to ensure a detection range 60 that is wider than the movable range 62 of the power transmission coil 30.
  • the power receiving unit 22 of the terminal device 20 is placed within the estimated chargeable range 64.
  • the terminal device 20 is wirelessly charged.
  • FIG. 6 a case is assumed in which the power receiving unit 22 of the terminal device 20 is placed outside the estimated chargeable range 64.
  • the power transmission coil 30 is moved toward the arrangement position of the terminal device 20, the power transmission coil 30 cannot reach a position where the terminal device 20 can be charged. Therefore, in this case, even if the power transmission coil 30 is moved, it is difficult to charge the terminal device 20 with the power transmission coil 30.
  • the determination unit 50B determines whether the terminal device 20 is within the estimated chargeable range 64 of the power transmission coil 30 based on the echo signal detection result by the signal detection unit 48.
  • the determination unit 50B detects an echo transmitted from the terminal device 20 to the second detection coil 40B in response to a magnetic field for detection by the first signal output from the signal output unit 46 to the second detection coil 40B. Accepts the signal detection results. Then, the determining unit 50B determines whether the terminal device 20 exists within the estimated chargeable range 64 based on the detection result.
  • FIG. 7 is a diagram showing an example of the detection results of the echo signals responded to each of the second sensing coil 40B1 and the second sensing coil 40B2.
  • the horizontal axis indicates the deviation in the X-axis direction. “0”, which is the origin of the horizontal axis, corresponds to an intermediate position in the X-axis direction between the second sensing coil 40B1 and the second sensing coil 40B2. Further, the position of the deviation X1 on the horizontal axis corresponds to the position of the second sensing coil 40B1 in the X-axis direction. The position of the deviation X2 on the horizontal axis corresponds to the position of the second sensing coil 40B2 in the X-axis direction.
  • the echo signals responded to these second sensing coils 40B are as follows. In FIG. 7, this is shown in line diagram 70A or line diagram 70B.
  • the determination unit 50B determines that the terminal device 20 is outside the estimated chargeable range 64 on the mounting surface 12A. Determine if it exists.
  • the determining unit 50B determines that the terminal device 20 exists outside the estimated chargeable range 64 on the mounting surface 12A. It is determined that it does not. That is, in this case, the determining unit 50B determines that the terminal device 20 is present within the estimated chargeable range 64.
  • the moving mechanism control section 50C controls the moving mechanism 34 based on the detection result by the signal detection section 48.
  • the moving mechanism control unit 50C controls the moving mechanism 30 so as not to move the power transmitting coil 30. control. Controlling the moving mechanism 34 so as not to move means not transmitting a signal regarding a movement instruction to the moving mechanism 34.
  • the moving mechanism control unit 50C places the power transmitting coil at the arrangement position specified by the arrangement position identification unit 50A.
  • a moving mechanism 34 is controlled to move 30.
  • the moving mechanism control unit 50C moves the power transmission coil 30 to the arrangement position specified by the arrangement position identification unit 50A. Further, the moving mechanism control unit 50C does not move the power transmission coil 30 when the terminal device 20 exists outside the estimated chargeable range 64.
  • the moving mechanism control unit 50C identifies the location of the terminal device 20 based on the detection result, and determines that the terminal device 20 exists within the estimated chargeable range 64 based on the detection result.
  • the moving mechanism 34 is controlled to move the power transmission coil 30 to the specified placement position.
  • the moving mechanism control unit 50C avoids unnecessary movement of the power transmission coil 30 when the terminal device 20 is placed outside the estimated chargeable range 64, that is, in a position where wireless charging is difficult. be able to.
  • the communication determination unit 50D determines whether the power transmission coil 30 can communicate with the terminal device 20. In the present embodiment, the communication determining unit 50D determines whether the power transmitting coil 30 is capable of communicating with the terminal device 20 when the power transmitting coil 30 is moved to the arrangement position of the terminal device 20 under the control of the moving mechanism control unit 50C. Determine.
  • the communication determination unit 50D causes the power transmission coil 30 to transmit a communication signal via the AC power supply 42.
  • the communication signal is, for example, PING.
  • PING is a power signal transmitted from the charging device 10 in order to start the terminal device 20.
  • the communication determination unit 50D of the control unit 50 may determine whether communication is possible by determining a response signal to a communication signal.
  • the power transmission control unit 50E causes the power transmission coil 30 to transmit power.
  • the power transmission control unit 50E controls the power transmission coil 30 to transmit power to the terminal device 20 when the communication determination unit 50D determines that communication is possible.
  • the power transmission control unit 50E controls the AC power supply 42 to supply AC power from the AC power supply 42 to the power transmission coil 30.
  • the power transmitting coil 30 is electromagnetically coupled to the power receiving unit 22 of the terminal device 20 to supply AC power to the power receiving unit 22 .
  • the AC power supplied to the power receiving unit 22 is converted into DC power by a rectifier provided in the terminal device 20, and the battery 24 is charged. Therefore, the battery 24 of the terminal device 20 is wirelessly charged.
  • FIG. 8 is a flowchart showing an example of the flow of charging processing performed by the charging device 10A of this embodiment.
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 based on the detection result of the signal detection unit 48 (step S100).
  • the arrangement position specifying unit 50A responds to the magnetic field for detection by the first signal output from the signal output unit 46 to the first sensing coil 40A, and detects the echo signal returned from the terminal device 20 to the first sensing coil 40A. Accept the detection results. Then, the placement position specifying unit 50A specifies the placement position based on the received detection result.
  • the determining unit 50B determines whether the terminal device 20 exists within the estimated chargeable range 64 by the power transmitting coil 30 (step S102). The determining unit 50B determines whether the terminal device 20 is within the estimated chargeable range 64 by determining whether the echo signals responded to the second sensing coil 40B1 and the second sensing coil 40B2 are less than the threshold value Vth. Determine whether or not.
  • step S104 the moving mechanism control unit 50C controls the moving mechanism 34 so as not to move the power transmitting coil 30 (step S104). That is, the moving mechanism control unit 50C does not transmit a signal regarding the movement instruction to the moving mechanism 34. Then, the process returns to step S100.
  • step S106 the moving mechanism control unit 50C controls the moving mechanism 34 to move the power transmission coil 30 to the arrangement position specified in step S100 (step S106). Through the process of step S106, the power transmission coil 30 moves to the location where the terminal device 20 is placed.
  • the communication determination unit 50D determines whether the power transmission coil 30 can communicate with the terminal device 20 (step S108).
  • the communication determining unit 50D determines whether the power transmitting coil 30 can communicate with the terminal device 20 when the power transmitting coil 30 reaches the arrangement position of the terminal device 20 through the process of step S106.
  • the communication determination unit 50D determines whether the power transmission coil 30 can communicate with the terminal device 20, for example, by using PING as a communication signal.
  • step S108: No If the communication determination unit 50D determines that communication is impossible (step S108: No), the process returns to step S100. If the communication determination unit 50D determines that communication is possible (step S108: Yes), the process advances to step S110.
  • step S110 the power transmission control unit 50E causes the power transmission coil 30 to transmit power (step S110).
  • step S110 wireless charging of the battery 24 of the terminal device 20 is started. Then, this routine ends.
  • the charging device 10A of the present embodiment is the charging device 10 that wirelessly charges the terminal device 20 that is disposed on the mounting surface 12A and includes the power receiving unit 22 that receives wirelessly transmitted power.
  • 10 A of charging devices of this embodiment are equipped with the power transmission coil 30, the power transmission control part 50E, the detection coil 40, the signal output part 46, and the determination part 50B.
  • the power transmission coil 30 transmits power to the terminal device 20.
  • the power transmission control unit 50E causes the power transmission coil 30 to transmit power.
  • the detection coil 40 is a coil for detecting the placement position of the terminal device 20 on the mounting surface 12A.
  • the signal output unit 46 outputs 40 first signals to the detection coil for generating a detection magnetic field.
  • the signal detection unit 48 detects an echo signal sent from the terminal device 20 to the detection coil 40 in response to the detection magnetic field.
  • the determining unit 50B determines whether the terminal device 20 exists within the estimated chargeable range 64 by the power transmitting coil 30 based on the detection result of the echo signal.
  • the power transmission coil is moved toward the placement position of the terminal device 20 placed on the placement surface 12A. started, and wireless charging started from the power transmission coil to the terminal device. For this reason, in the prior art, even when the terminal device 20 is placed in a position where wireless charging is difficult, the power transmission coil may be moved or wireless charging may be started, resulting in increased power consumption.
  • the determination unit 50B determines whether the terminal device 20 is present within the estimated chargeable range 64 by the power transmission coil 30.
  • wireless charging, movement of the power transmission coil 30, etc. can be controlled using the determination result of whether the terminal device 20 is present within the estimated chargeable range 64. That is, in the charging device 10A, control such as unnecessary movement of the power transmission coil 30 and unnecessary start of wireless charging can be suppressed.
  • the charging device 10A of this embodiment can save power.
  • the charging device 10A of this embodiment can include an arrangement position specifying section 50A and a movement mechanism control section 50C.
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 based on the detection result of the signal detection unit 48.
  • the moving mechanism 34 moves the power transmitting coil 30.
  • the moving mechanism control unit 50C controls the moving mechanism 34 based on the detection result.
  • the arrangement position specifying unit 50A controls the moving mechanism 34 so as not to move the power transmitting coil 30. Furthermore, when it is determined that the terminal device 20 is within the estimated chargeable range 64, the placement position specifying unit 50A controls the moving mechanism 34 to move the power transmission coil 30 to the placement position of the terminal device 20.
  • the arrangement of the terminal device 20 placed on the mounting surface 12A is fixed regardless of whether the arrangement position of the terminal device 20 is within the estimated chargeable range 64 or not.
  • the power transmitting coil 30 started moving toward the position, and wireless charging started from the power transmitting coil 30 toward the terminal device 20.
  • FIG. 9 is a flowchart showing an example of the flow of charging control of a conventional charging device.
  • control unit of the conventional charging device specifies the location of the terminal device 20 (step S1000), it controls the movement of the power transmission coil 30 to the location (step S1020). Then, the control unit of the conventional charging device determines whether the power transmission coil 30 that has been controlled to move to the placement position can communicate with the terminal device 20 (step S1040). If it is determined that the control unit cannot communicate (step S1040: No), the process returns to step S1000. If the control unit determines that communication is possible (step S1040: Yes), it transmits power to the terminal device 20 (step S1060), and ends this routine.
  • the terminal device 20 is placed on the mounting surface 12A without determining whether or not it exists within the estimated chargeable range 64 by the power transmission coil 30.
  • the power transmission coil 30 had started to move toward the location where the terminal device 20 was placed. Therefore, in the conventional technology, even when the terminal device 20 is placed in a position where wireless charging is not possible, the movement of the power transmission coil 30 is controlled, and the motors such as the drive motor 34A and the drive motor 34B are not driven. etc., the power consumption was increasing.
  • the charging device 10A of the present embodiment determines whether the terminal device 20 exists within the estimated chargeable range 64 by the power transmission coil 30.
  • the moving mechanism 34 is controlled to move the power transmission coil 30 to the location where the terminal device 20 is located.
  • the charging device 10A of this embodiment can suppress unnecessary movement of the power transmission coil 30. That is, in addition to the above effects, the charging device 10A of this embodiment can effectively save power.
  • FIGS. 10A and 10B are explanatory diagrams of an example of the effects of the charging device 10A of this embodiment.
  • FIG. 10A is an explanatory diagram of an example of the control content by the conventional charging device when the power receiving unit 22 of the terminal device 20 is located in each region of the space on the mounting surface 12A.
  • FIG. 10B is an explanatory diagram of an example of the content of control by the charging device 10A of this embodiment when the power receiving unit 22 of the terminal device 20 is located in each region of the space on the mounting surface 12A.
  • the horizontal axis represents the distance in the X-axis direction on the mounting surface 12A.
  • FIGS. 10A and 10B show distances in the X-axis direction, with the origin "0" being the midpoint between the second sensing coil 40B1 and the second sensing coil 40B2 in the X-axis direction of the mounting surface 12A.
  • the vertical axis represents the distance in the Z-axis direction between the mounting surface 12A and the power receiving unit 22 of the terminal device 20 when the mounting surface 12A is set as the origin "0".
  • region 72 represents the region in real space where charging is started.
  • the region 74 represents a region where the arrangement position is detected by the detection coil 40 but charging is not started.
  • Region 76 represents a region where movement of power transmission coil 30 is not controlled and charging is not started.
  • the area 76 in which the movement of the power transmitting coil 30 is not controlled in the space above the mounting surface 12A is wider than in the conventional charging device shown in FIG. 10A. .
  • the charging device 10A of this embodiment can more effectively save power than conventional charging devices.
  • FIG. 3 is a block diagram showing an example of the configuration of the charging device 10B of this embodiment.
  • Charging device 10B is an example of charging device 10.
  • the charging device 10B has the same configuration as the charging device 10A of the above embodiment, except that it includes a control section 52 instead of the control section 50.
  • the control unit 52 includes a placement position specifying unit 50A, a determining unit 52B, a moving mechanism control unit 52C, a communication determining unit 50D, and a power transmission control unit 50E.
  • the control unit 52 is the same as the control unit 50 of the embodiment described above, except that it includes a discrimination unit 52B instead of the discrimination unit 50B, and a movement mechanism control unit 52C instead of the movement mechanism control unit 50C.
  • the moving mechanism control section 52C controls the moving mechanism 34 based on the detection result by the signal detection section 48, similar to the moving mechanism control section 50C of the above embodiment.
  • the moving mechanism control unit 52C moves the power transmission coil 30 to the placement position.
  • the moving mechanism 34 is controlled as follows.
  • the moving mechanism control unit 52C moves the power transmitting coil 30 to the specified placement position before it is determined whether or not the terminal device 20 exists in the estimated chargeable range 64. Controls the moving mechanism 34.
  • the movement mechanism control section 52C may control the movement of the movement mechanism 34 in the same manner as the movement mechanism control section 50C, except that the timing of movement control of the movement mechanism 34 is different from that of the movement mechanism control section 50C of the above embodiment.
  • the determination unit 52B determines whether the terminal device 20 is within the estimated chargeable range 64 by the power transmission coil 30 based on the detection result of the echo signal by the signal detection unit 48. Determine.
  • the discriminating section 52B receives the second detecting coil from the terminal device 20 in response to a magnetic field for detection caused by the first signal output from the signal output section 46 to the second detecting coil 40B.
  • the echo signal detection result sent as a response to 40B is accepted.
  • the determining unit 52B determines whether the terminal device 20 exists within the estimated chargeable range 64 based on the detection result.
  • the determining section 52B determines whether the power transmitting coil 30, which has been controlled to move to the arrangement position, is unable to communicate with the terminal device 20 based on the detection result of the signal detecting section 48. exists within the estimated chargeable range 64.
  • the determination unit 52B determines whether the terminal device 20 is within the estimated chargeable range 64 when the power transmission coil 30 is controlled to move toward the arrangement position and it is determined that communication with the terminal device 20 is impossible. Determine whether it exists or not.
  • the determining unit 52B may determine whether the terminal device 20 is within the estimated chargeable range 64 in the same manner as the determining unit 50B, except that the timing of determination is different from the determining unit 50B of the above embodiment. .
  • FIG. 11 is a flowchart showing an example of the flow of charging processing performed by the charging device 10B of this embodiment.
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 based on the detection result of the signal detection unit 48 (step S200).
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 in the same manner as in step S100 (see FIG. 8) of the above embodiment.
  • the moving mechanism control unit 52C controls the moving mechanism 34 to move the power transmitting coil 30 to the arrangement position specified in step S200 (step S202). Through the process of step S202, the power transmission coil 30 is controlled to move toward the location where the terminal device 20 is placed.
  • the communication determination unit 50D determines whether the power transmission coil 30 can communicate with the terminal device 20 (step S204).
  • the communication determination unit 50D determines whether the power transmission coil 30 can communicate with the terminal device 20 by using PING as a communication signal, similarly to the above embodiment.
  • step S204 the process advances to step S206.
  • step S206 the power transmission control unit 50E causes the power transmission coil 30 to transmit power (step S206).
  • step S206 wireless charging of the battery 24 of the terminal device 20 is started. Then, this routine ends.
  • step S208 the placement position specifying unit 50A specifies the placement position of the terminal device 20 based on the detection result of the signal detection unit 48 (step S208).
  • the process in step S208 is similar to step S200 above.
  • the determining unit 52B determines whether the terminal device 20 exists within the estimated chargeable range 64 by the power transmitting coil 30, based on the echo signal detection result (step S210). Similar to the determining unit 50B of the above embodiment, the determining unit 52B determines whether the echo signals responded to the second sensing coil 40B1 and the second sensing coil 40B2 are less than the threshold value Vth, thereby determining whether the terminal device 20 is within the estimated chargeable range 64.
  • step S210: Yes If it is determined that the terminal device 20 exists within the estimated chargeable range 64 (step S210: Yes), the process advances to step S202. If it is assumed that the terminal device 20 exists outside the estimated chargeable range 64 (step S210: No), the process proceeds to step S208.
  • the moving mechanism control unit 52C moves the power transmission coil 30 to the location.
  • the moving mechanism 34 is controlled as follows. When it is determined that the power transmitting coil 30 whose movement has been controlled to the placement position is unable to communicate with the terminal device 20, the determination unit 52B determines the estimated chargeable range of the terminal device 20 based on the detection result of the signal detection unit 48. 64 is present.
  • the movement control of the power transmitting coil 30 is repeated until it is determined that the communication is possible. was running.
  • step S1040 movement control of the power transmitting coil 30 is repeatedly executed until it is determined that communication is possible (step S1040: Yes). (Step S1040: No, see Step S1000 and Step S1020).
  • the moving mechanism control unit 52C controls the movement of the power transmission coil 30 toward the arrangement position, and after the communication determination unit 50D determines that communication is impossible, the terminal device 20 can be charged. It is determined whether the object exists within the estimated range 64 (see FIG. 11). In the charging device 10B of the present embodiment, when it is determined that the terminal device 20 exists within the estimated chargeable range 64, the moving mechanism 34 is controlled to move the power transmitting coil 30 to the arrangement position.
  • the charging device 10B of the present embodiment can suppress repeated unnecessary movements of the power transmission coil 30, compared to conventional charging devices. That is, the charging device 10B of this embodiment can effectively save power similarly to the charging device 10A of the above embodiment.
  • the charging device 10B of the present embodiment expands the range of the chargeable area on the mounting surface 12A while minimizing the movement of the power transmission coil 30. be able to.
  • FIGS. 12A and 12B are explanatory diagrams of an example of the effects of the charging device 10B of this embodiment.
  • FIG. 12A is an explanatory diagram of an example of the control content by the conventional charging device when the power receiving unit 22 of the terminal device 20 is located in each region of the space on the mounting surface 12A.
  • FIG. 12B is an explanatory diagram of an example of the content of control by the charging device 10B of this embodiment when the power receiving unit 22 of the terminal device 20 is located in each region of the space on the mounting surface 12A.
  • the horizontal axis represents the distance in the X-axis direction on the mounting surface 12A.
  • 12A and 12B show the distance in the X-axis direction, with the origin "0" being the midpoint between the second sensing coil 40B1 and the second sensing coil 40B2 in the X-axis direction of the mounting surface 12A.
  • the vertical axis represents the distance in the Z-axis direction between the mounting surface 12A and the power receiving unit 22 of the terminal device 20 when the mounting surface 12A is set as the origin "0".
  • region 72, region 74, and region 76 are the same as in the above embodiment. That is, the area 72 represents an area in real space where charging is started.
  • the region 74 represents a region where the arrangement position is detected by the detection coil 40 but charging is not started.
  • Region 76 represents a region where movement of power transmission coil 30 is not controlled and charging is not started.
  • a region 78 represents a region where charging is started without controlling the movement of the power transmitting coil 30 if the power transmitting coil 30 and the power receiving unit 22 can communicate.
  • the charging device 10B of this embodiment compared to the conventional charging device shown in FIG. 12A, the area 76 in which the movement of the power transmitting coil 30 is not controlled in the space above the mounting surface 12A is wider. . Therefore, it can be said that the charging device 10B of this embodiment can more effectively save power than the conventional charging device.
  • the charging device 10B of this embodiment expands the range of the chargeable area on the mounting surface 12A while minimizing the movement of the power transmission coil 30. It can be said that it is possible to do so.
  • FIG. 3 is a block diagram showing an example of the configuration of the charging device 10C of this embodiment.
  • Charging device 10C is an example of charging device 10.
  • the charging device 10C has the same configuration as the charging device 10A of the above embodiment, except that it includes a control section 53 instead of the control section 50.
  • the control unit 53 includes an arrangement position specifying unit 50A, a determining unit 53B, a moving mechanism control unit 52C, a communication determining unit 53D, and a power transmission control unit 50E.
  • the arrangement position specifying section 50A, the moving mechanism control section 52C, and the power transmission control section 50E are the same as those in the above embodiment.
  • the determination unit 53B determines whether the terminal device 20 is charged based on the detection result of the signal detection unit 48 when the movement mechanism control unit 52C controls the movement of the power transmission coil 30 to the placement position specified by the placement position specification unit 50A. It is determined whether or not it exists within the possible estimation range 64.
  • the determining unit 53B may determine whether the terminal device 20 is within the estimated chargeable range 64 in the same manner as the determining unit 50B, except that the timing of determination is different from the determining unit 50B of the above embodiment. .
  • the communication determining unit 53D determines whether the power transmitting coil 30 can communicate with the terminal device 20.
  • the communication determination unit 53D determines whether or not it is possible to communicate with the terminal device 20 using a communication signal such as PING, similarly to the communication determination unit 50D.
  • the communication determination unit 53D determines whether communication with the terminal device 20 is possible using a communication signal with a voltage level according to the determination result by the determination unit 53B.
  • the communication determination unit 53D controls the terminal device 20 to move to the placement position using a communication signal with a first voltage that is less than or equal to the first threshold. It is determined whether the power transmission coil 30 can communicate with the terminal device 20.
  • the communication determination unit 53D uses a communication signal of a second voltage equal to or higher than a second threshold, which is greater than the first threshold, to move the terminal device 20 to the placement position. It is determined whether the controlled power transmission coil 30 can communicate with the terminal device 20.
  • the first threshold value may be determined in advance.
  • the first threshold value may be predetermined as a value at which a communication signal with a first voltage equal to or less than the first threshold value becomes the voltage level of a communication signal used for normal communication confirmation.
  • the second threshold value may be predetermined to be larger than the first threshold value.
  • the second threshold is set such that when a communication signal with a second voltage equal to or higher than the second threshold exceeds the voltage level of a communication signal used for normal communication confirmation and reaches the power receiving unit 22 of the terminal device 20, the terminal device 20 What is necessary is to predetermine a value at a voltage level at which the voltage is not electrically destroyed by high voltage.
  • control unit 53 of the charging device 10C may start wireless charging of the terminal device 20 when it is determined that communication is possible using the communication signal of the first voltage or the communication signal of the second voltage.
  • FIG. 13 is a flowchart showing an example of the flow of charging processing performed by the charging device 10C of this embodiment.
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 based on the detection result of the signal detection unit 48 (step S300).
  • the placement position specifying unit 50A specifies the placement position of the terminal device 20 in the same manner as in step S100 (see FIG. 8) of the above embodiment.
  • the moving mechanism control unit 52C controls the moving mechanism 34 to move the power transmitting coil 30 to the arrangement position specified in step S300 (step S302). Through the process of step S302, the power transmission coil 30 is controlled to move toward the location where the terminal device 20 is placed.
  • the determining unit 53B determines whether the terminal device 20 exists within the estimated chargeable range 64 by the power transmitting coil 30, based on the echo signal detection result (step S304). Similar to the determining unit 50B of the above embodiment, the determining unit 53B determines whether the echo signals responded to the second sensing coil 40B1 and the second sensing coil 40B2 are less than the threshold value Vth, thereby determining whether the terminal device 20 is within the estimated chargeable range 64.
  • step S304 If it is determined that the terminal device 20 exists within the estimated chargeable range 64 (step S304: Yes), the process advances to step S306.
  • step S306 the communication determination unit 53D determines whether the power transmission coil 30 is capable of communicating with the terminal device 20 within the estimated chargeable range 64 using the communication signal with the first voltage equal to or lower than the first threshold. (Step S306). If it is determined in step S306 that communication is possible (step S306: Yes), the process advances to step S310, which will be described later. If it is determined in step S306 that communication is not possible (step S306: No), the process returns to step S300.
  • step S304 determines that the terminal device 20 exists outside the estimated chargeable range 64 (step S304: No). If it is determined that the terminal device 20 exists outside the estimated chargeable range 64 (step S304: No), the process advances to step S308.
  • step S308 the communication determination unit 53D determines whether the power transmission coil 30 can communicate with the terminal device 20 outside the estimated chargeable range 64 using the communication signal with the second voltage equal to or higher than the second threshold. (Step S308). If it is determined in step S308 that communication is not possible (step S308: No), the process returns to step S300. If it is determined in step S308 that communication is possible (step S308: Yes), the process advances to step S310.
  • step S310 the power transmission control unit 50E causes the power transmission coil 30 to transmit power (step S310).
  • step S310 wireless charging of the battery 24 of the terminal device 20 is started. Then, this routine ends.
  • the determination unit 53B determines whether the terminal device 20 exists within the estimated chargeable range 64 based on the detection result when the power transmission coil 30 is controlled to move to the arrangement position. Determine whether or not to do so. If it is determined that the terminal device 20 is within the estimated chargeable range 64, the communication determination unit 50D uses a communication signal of a first voltage that is less than or equal to the first threshold value to move the power transmission coil 30 that has been controlled to move to the arrangement position. It is determined whether communication with the terminal device 20 is possible.
  • the communication determination unit 50D uses a communication signal of a second voltage equal to or higher than a second threshold, which is greater than the first threshold, to move the terminal device 20 to the placement position. It is determined whether the controlled power transmission coil 30 can communicate with the terminal device 20.
  • step S1040 No, see step S1000 and step S1020.
  • the power transmission coil 30 can communicate with the terminal device 20 using the communication signal of the second voltage depending on whether the terminal device 20 exists within the estimated chargeable range 64. Determine whether or not. That is, when the charging device 10C determines that the terminal device 20 is outside the estimated chargeable range 64, the power transmitting coil 30 uses the communication signal of the second voltage equal to or higher than the second threshold, which is larger than the first threshold, to cause the power transmitting coil 30 to connect to the terminal device. It is determined whether communication with 20 is possible.
  • the charging device 10C if it is determined that communication is possible, wireless charging of the terminal device 20 is started, and if it is determined that communication is not possible, the charging device 10C specifies the placement position of the terminal device 20 and executes movement control of the power transmission coil 30. do.
  • the charging device 10C of the present embodiment uses communication signals of different voltage levels depending on whether the terminal device 20 exists within the estimated chargeable range 64 or outside the estimated chargeable range 64. , determines whether communication with the terminal device 20 is possible.
  • the charging device 10C of the present embodiment can suppress repeated unnecessary movements of the power transmission coil 30 compared to conventional charging devices. That is, the charging device 10C of the present embodiment can effectively save power similarly to the charging device 10A of the above embodiment.
  • the charging device 10C of the present embodiment determines that the terminal device 20 exists outside the estimated chargeable range 64
  • the charging device 10C uses a communication signal of a second voltage equal to or higher than a second threshold, which is larger than the first threshold, to charge the power transmitting coil. 30 is able to communicate with the terminal device 20. Therefore, compared to a configuration in which wireless charging is not started when the terminal device 20 exists outside the estimated chargeable range 64, it is possible to expand the area on the mounting surface 12A in which charging can be started.
  • Modification 1 In the embodiment described above, the configuration in which the sensing coil 40 is configured from the first sensing coil 40A and the second sensing coil 40B has been described as an example. In this modification, a configuration in which a plurality of sensing coils 40 are extended in each of the X-axis direction and the Y-axis direction and arranged so as to intersect with each other will be described as an example.
  • FIG. 14 is a block diagram showing an example of the configuration of a charging device 10D of this modification.
  • Charging device 10D is an example of charging device 10.
  • the charging device 10D is the same as the above implementation except that the detection coil 40 includes a plurality of coils 41 in place of the first detection coil 40A and the second detection coil 40B, and the control unit 54 is provided in place of the control unit 50.
  • the configuration is similar to that of the charging devices 10A to 10C of the present invention.
  • the sensing coil 40 extends in a first direction (X-axis direction) in a two-dimensional plane along the mounting surface 12A, and extends along a second direction (Y-axis direction) that intersects the first direction. It consists of a plurality of coils 41 arranged in plurality, extended in the second direction (Y-axis direction), and arranged in plurality along the first direction (X-axis direction).
  • the coil 41 includes a coil 41A and a coil 41B.
  • the coils 41A are coils extending in the Y-axis direction and arranged in plurality along the X-axis direction.
  • the coils 41B are coils extending in the X-axis direction and arranged in plurality along the Y-axis direction.
  • the detection range 60 on the mounting surface 12A is an area where the detection coil 40, which is the coil 41 composed of the plurality of coils 41A and the plurality of coils 41B, is arranged. Similar to the embodiment described above, the detection range 60 includes the entire movable range 62 and the estimated chargeable range 64, and is wider than these ranges.
  • a detection coil 40 made up of a plurality of coils 41 is electrically connected to each of a signal output section 46 and a signal detection section 48 via a selector 44.
  • the signal output section 46 and the signal detection section 48 are the same as those in the above embodiment.
  • the control unit 54 includes a placement position identification unit 54A, a determination unit 54B, a moving mechanism control unit 54C, a communication determination unit 54D, and a power transmission control unit 54E.
  • the placement position specifying unit 54A specifies the placement position of the terminal device 20 based on the detection result of the signal detection unit 48, similar to the placement position specifying unit 50A of the above embodiment.
  • the arrangement position specifying section 54A specifies the arrangement position of the terminal device 20 based on the level of the echo signal which is the detection result of the signal detection section 48, similarly to the arrangement position specifying section 50A.
  • the arrangement position specifying unit 54A responds to the magnetic field for detection by the first signal output from the signal output unit 46 to each of the coils 41 included in the detection coil 40, and moves the coil 41 from the terminal device 20.
  • the placement position is specified based on the detection result of the echo signal responded to.
  • the arrangement position specifying unit 54A determines which of the plurality of coils 41A arranged along the X-axis direction the echo signal responded to is higher than a predetermined level. . Through this determination, the arrangement position specifying unit 54A specifies the position of the terminal device 20 in the X-axis direction in the detection range 60 on the mounting surface 12A. Specifically, the arrangement position specifying unit 54A selects the coil 41A that outputs the echo signal of the maximum level and that has a signal of a predetermined level or higher among the echo signals of each of the plurality of coils 41A detected by the signal detection unit 48. The position is specified as the position of the terminal device 20 in the X-axis direction.
  • the arrangement position specifying unit 54A determines which of the plurality of coils 41B arranged along the Y-axis direction, to which of the coils 41B the echo signal responded is at a predetermined level or higher. Through this determination, the arrangement position specifying unit 54A specifies the position of the terminal device 20 in the Y-axis direction in the detection range 60 on the mounting surface 12A. Specifically, the arrangement position specifying unit 54A selects a coil 41B that outputs an echo signal of a maximum level and a signal of a predetermined level or higher among the echo signals of each of the plurality of coils 41B detected by the signal detection unit 48. The position is specified as the position of the terminal device 20 in the Y-axis direction.
  • the placement position specifying unit 54A specifies the placement position of the terminal device 20, which is represented by the position in the X-axis direction and the position in the Y-axis direction, on the two-dimensional plane of the mounting surface 12A.
  • the placement position specifying unit 54A specifies the placement position of the terminal device 20 at the same timing as the placement position specifying unit 50A of the above embodiment, except that the method of specifying the placement position of the terminal device 20 is different.
  • the determining unit 54B determines whether the terminal device 20 is within the estimated chargeable range 64 by the power transmitting coil 30 based on the detection result of the echo signal. Determine whether or not to do so.
  • the determination unit 54B performs the determination process using the placement position of the terminal device 20 specified by the placement position identification unit 54A based on the detection result of the echo signal.
  • the placement position specifying unit 54A determines the placement position of the terminal device 20, which is represented by the position in the X-axis direction and the position in the Y-axis direction, on the two-dimensional plane of the mounting surface 12A. Identify. Therefore, the determining unit 54B determines whether or not the placement position specified by the placement position specifying unit 54A is located within the estimated chargeable range 64 stored in advance, so that the terminal device 20 can be charged. It is determined whether or not it exists within the estimated range 64.
  • the determining unit 54B is the same as the determining unit 50B, the determining unit 52B, or the determining unit 53B of the above embodiment, except that the method of determining whether or not the terminal device 20 is present within the estimated chargeable range 64 is different from the above embodiment. It is determined whether or not the terminal device 20 exists within the estimated chargeable range 64 at the same timing as each of the above.
  • the processing of the moving mechanism control unit 54C, communication determination unit 54D, and power transmission control unit 54E is the same as in the above embodiment. That is, the movement mechanism control section 54C is similar to the movement mechanism control section 50C or the movement mechanism control section 52C of the above embodiment.
  • the communication determining section 54D is similar to the communication determining section 50D or the communication determining section 53D of the above embodiment.
  • the power transmission control section 54E is similar to the power transmission control section 50E of the above embodiment.
  • the control unit 54 of the charging device 10D of this modification is different from the control unit 50 of the above embodiment, except that the method of specifying the placement position by the placement position specifying unit 54A and the discrimination method by the discrimination unit 54B are different from those of the above embodiment.
  • the same processing as each of the section 52 and the control section 53 is executed.
  • the position represented by the position in the X-axis direction and the position in the Y-axis direction on the two-dimensional plane of the mounting surface 12A is used as the arrangement position of the terminal device 20, similarly to the above embodiment. , power saving can be achieved.

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  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
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DE112023002501.0T DE112023002501T5 (de) 2022-06-02 2023-05-31 Ladegerät
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