JP2018038111A - Power transmission relay apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission relay device which allows for efficient power supply from a power transmission coil to a power reception coil included in an electronic product, by interposing between the power transmission coil and power reception coil, even though the distance therebetween is far away, when charging the electronic product.SOLUTION: In a power transmission relay device, a mobile device 1 moving between a power transmission coil 7 and a power reception coil 8, and the relay coil body 2b of a relay coil l2 fixed to the mobile device 1 are arranged so that a distance allowing appropriate resonance with a magnetic field generated in the power transmission coil body 7b of the power transmission coil 7 is ensured for any position of the surface. When a current flows through the relay coil body 2b of a relay coil l2, and a magnetic field generated by the current and the power reception coil body 8b of the power reception coil 8 resonate, power is supplied efficiently from the power transmission coil body 7b to the power reception coil body 8b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power transmission relay device that moves between a power transmission coil and a power reception coil that perform charging by supplying power to an electronic product in a non-contact manner and efficiently supplies power from the power transmission coil to the power reception coil. About.

  As one of methods for charging an electronic product, a method is known in which power is supplied in a contactless manner with a power receiving coil provided in the electronic product facing a power transmission coil connected to a power supply that supplies power. . In this charging method, in order to supply electric power, it is required to arrange the power transmission coil and the power reception coil so that the power transmission coil and the power reception coil are disposed at appropriate positions. However, when power is supplied from the power transmission coil to the power reception coil, if the distance between the power transmission coil and the power reception coil is large, there is a problem that power cannot be appropriately supplied to the electronic product. Therefore, an apparatus that can supply power is important even when the power receiving coil provided in the electronic product cannot be disposed at a position suitable for power supply with the power transmission coil.

  Here, as a conventional technique, in order to enable power supply even when the distance between the power transmission coil and the power reception coil is large, a relay antenna (hereinafter referred to as a power transmission relay unit) is provided inside the airbag. There is known a technique in which a device provided with the above is provided on an upper part of a power transmission coil (see, for example, Patent Document 1). When charging an electric vehicle, the air bag provided on the upper part of the power transmission coil is inflated, and the power transmission relay unit provided inside the air bag is lifted up so that the power transmission coil and the power receiving coil are It is interposed near the middle position between. Thus, when power is supplied from the power transmission coil to the power reception coil, the power transmission relay unit resonates with the magnetic field generated in the power transmission coil, and a current flows through the power transmission relay unit. The magnetic field generated by the current flowing in the power transmission relay unit and the power receiving coil resonate, so that power can be efficiently supplied from the power transmitting coil to the power receiving coil and the vehicle can be efficiently charged. Become.

JP-A-2015-177633 (paragraphs [0047] to [0051], [FIG. 12], etc.)

  However, for example, in an apparatus provided with a power transmission relay unit inside an air bag provided in the upper part of a power transmission coil described in Patent Document 1, when supplying power, first, the air bag is connected to the power transmission coil. It expands from the position in the direction of the power receiving coil, and at the same time, the power transmission relay unit moves in the direction of the power receiving coil. At this time, since the airbag does not inflate to a certain shape, the surface of the power transmission relay portion is easily inclined from the horizontal direction of the opposing surfaces of the power transmission coil and the power reception coil, and in this state, the power transmission relay portion is between the coils. Easy to place. Therefore, the distance between the power transmission relay unit and both coils differs depending on the position of the surface, and it is difficult to achieve a distance suitable for magnetic field resonance with both coils. Therefore, it is insufficient for the power transmission relay unit to relay and efficiently supply power from the power transmission coil to the power reception coil.

  Therefore, in the present invention, when the distance between the power transmission coil and the power reception coil is long, or the center position of the power transmission coil and the power reception coil is slightly shifted, there is a possibility that the power supply efficiency may be reduced. However, it is an object of the present invention to provide a power transmission relay device that improves the efficiency of charging electronic products by interposing a power transmission relay unit.

  In order to solve such a problem, the invention described in claim 1 is directed to a moving device that moves between a power transmission coil and a power receiving coil, and a magnetic field that is fixed to the moving device and that is generated in the power transmission coil. And a power transmission relay unit that resonates a magnetic field generated by the flowing current with the power receiving coil and supplies power from the power transmitting coil to the power receiving coil.

  The invention according to claim 2 adds to the configuration according to claim 1, and a position detection device that detects that the power transmission coil is disposed at a position facing the power reception coil and transmits a signal; A control device is provided that receives a signal from the position detection device, causes the moving device to control operation, and moves the moving device between the power receiving coil and the power transmitting coil.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the moving device is provided with foreign matter removing means for removing foreign matter interposed between the power transmission coil and the power receiving coil. It is characterized by that.

  According to the present invention, when the distance between the power transmission coil and the power reception coil is long, or the center position of the power transmission coil and the power reception coil is slightly shifted, there is a possibility that the power supply efficiency may be reduced. However, the charging efficiency of the electronic product can be improved by interposing the power transmission relay unit.

It is a perspective view which shows the structure of the electric power transmission relay apparatus etc. which concern on Embodiment 1 of this invention. It is a side view which shows the usage method of the electric power transmission relay apparatus which concerns on this Embodiment 1. FIG. It is a perspective view which shows the state which the relay coil which concerns on this Embodiment 1 moves between the coil for power transmission and the coil for power reception. It is a side view which shows the state which the moving apparatus of the relay coil which concerns on this Embodiment 1 intervenes between the coil for power transmission and the coil for power reception. It is a perspective view which shows the state which has arrange | positioned the relay coil which concerns on this Embodiment 1 in the accommodating part provided in the standby charging box. It is a perspective view which shows the state which the relay coil which concerns on this Embodiment 1 interposes between the coil for power transmission and the coil for power reception. (A) A schematic diagram showing a state in which power is supplied from a power transmission coil to a power receiving coil via the relay coil body according to the first embodiment, and (b) via a relay resonator according to the second embodiment of the present invention. It is the schematic which shows the state which supplies electric power from the coil for power transmission to the coil for power reception.

Embodiment 1 of the Invention
1 to 7 (a) show Embodiment 1 of the present invention.
As shown in FIGS. 1 and 2, the power transmission relay device 100 according to the first embodiment includes a power receiving coil 8 provided in a vehicle 9 from a power transmitting coil body 7 b of a power transmitting coil 7 provided on the ground. When power is supplied to the power receiving coil body 8b, as shown in FIG. 4, the power is transferred between the power transmitting coil 7 and the power receiving coil 8 to transfer power from the power transmitting coil body 7b to the power receiving coil body 8b. As a “power transmission relay unit” that relays supply, a mobile device 1 having a relay coil 2 fixed thereto and a standby charging box 3 in which the mobile device 1 is stored are provided.

  The power transmission coil 7 is provided on the ground as shown in FIG. In addition, as shown in FIGS. 1, 3 to 6, the power transmission coil 7 includes a circular power transmission coil body 7 b provided inside a circular cylindrical power transmission casing 7 a. It is configured.

  On the other hand, the power receiving coil 8 is provided in the vehicle 9 as shown in FIG. In addition, as shown in FIGS. 1 and 3 to 6, the power receiving coil 8 has a circular power receiving coil body 8 b provided inside a casing 8 a of a circular cylindrical power receiving coil. It is configured. Further, the power receiving coil 8 is provided with a circular lower surface of the power receiving coil body 8b facing the ground at a position away from the ground of the vehicle 9.

  As shown in FIG. 1, the moving device 1 according to the first embodiment has a flat box-shaped device body 10, and the device body 10 is provided with four wheels 12 that roll on the ground. A drive source (not shown) for rolling the wheel 12 is provided. Further, a foreign substance removing means 6 is provided in the front portion of the apparatus main body 10, and the apparatus main body 10 receives a signal from the position detection device 4 that detects the position of the power receiving coil 8 provided in the vehicle 9. Thus, a control device 5 for controlling the driving source and controlling the foreign matter removing means 6 is provided. The position detection device 4 is provided in the standby charging box 3. Further, in the center of the apparatus main body 10, as a “power transmission relay unit” that relays the supply of power from the power transmission coil 7 provided on the ground to the power reception coil 8 provided on the vehicle 9, as shown in FIG. A relay coil 2 as shown in FIG. Further, the wheel 12, the drive source, the foreign matter removing means 6, and the control device 5 are provided outside the relay coil 2.

  As shown in FIGS. 1, 5 and 6, the relay coil 2 is configured such that a circularly formed relay coil body 2b is provided inside a casing 2a of a circular cylindrical relay coil. . The central portion of the circular relay coil body 2b is made of resin. In addition, the relay coil body 2b is configured to include a coil around which an electric wire is wound, as shown in FIG. Furthermore, as shown in FIG. 6, the size of the outer periphery of the relay coil main body 2b is configured to be larger than the outer periphery of the power transmitting coil main body 7b and the power receiving coil main body 8b. In the first embodiment, the relay coil body 2b is provided inside the housing 2a. However, the housing 2a of the moving device 1 is not necessary and may be provided as it is inside the device body 10. good. The inside of the relay coil body 2b is made of resin, but is not limited thereto, and may be a magnetic body, metal, or a cavity.

  Further, the foreign matter removing means 6 is constituted by a rotary brush, and when the moving device 1 moves between a power transmission coil 7 provided on the ground and a power reception coil 8 provided on the vehicle 9, It is configured to sweep out foreign matter existing on the upper part of the coil 7 and remove it from the region between the power transmission coil 7 and the power reception coil 8. The foreign matter removing means 6 may be a wind pressure device that generates a wind pressure and blows away the foreign matter.

  The wheel 12 may be an endless track, for example, and the control device 5 is provided in the moving device 1 in this embodiment, but may be provided in the standby charging box 3.

  On the other hand, as shown in FIG. 1, the standby charging box 3 of the power transmission relay device 100 is provided with a recess-shaped storage portion 13 that can store the mobile device 1. The standby charging box 3 is provided with a charging device for charging the mobile device 1 while the mobile device 1 is waiting in the storage unit 13.

  In addition, as shown in FIG. 2, the standby charging box 3 is connected to the power transmission coil body 7 b of the power transmission coil 7 and charges the power reception coil body 8 b of the power reception coil 8 provided in the vehicle 9. It also serves as a power supply device for supplying power to the power transmission coil body 7b. In addition to this configuration, a power supply device (not shown) connected to the power transmission coil body 7 b may be provided separately from the standby charging box 3.

  Further, as shown in FIG. 1, the standby charging box 3 is provided with the position detection device 4 described above, and the position detection device 4 has moved to a position where the power receiving coil 8 faces the power transmission coil 7. Is detected, and a signal is transmitted to the control device 5 provided in the mobile device 1. The operations of the position detection device 4 and the control device 5 will be described later.

  Although the position detection device 4 is provided in the standby charging box 3 in this embodiment, the position detection device 4 may be provided in the mobile device 1 and may be provided in the power transmission coil 7 that can easily detect the position of the power reception coil 8. It may be provided near the position.

Next, a method of using the power transmission relay device 100 according to the first embodiment will be described.
First, in order to charge the vehicle 9, as shown in FIG. 2, the driver moves the vehicle 9 so that the power receiving coil 8 provided on the vehicle 9 faces the power transmitting coil 7 provided on the ground. Stop. At this time, the position detection device 4 provided in the standby charging box 3 detects that the power receiving coil 8 has moved to a position facing the power transmission coil 7 and sends a signal to the control device 5 provided in the moving device 1. Send. The control device 5 records the distance from the storage unit 13 provided in the standby charging box 3 to the power transmission coil 7. The control device 5 receives the signal from the position detection device 4 and receives the signal from the mobile device 1. Controls the driving source. As a result, the moving device 1 automatically moves to the outside from the storage unit 13 provided in the standby charging box 3 as shown in FIG. 3, and between the power transmitting coil 7 and the power receiving coil 8 as shown in FIG. Move to.

  At this time, the moving device 1 pushes out and removes foreign matter interposed between the power transmission coil 7 and the power reception coil 8.

  Further, the position detecting device 4 detects that the power receiving coil 8 has moved to a position facing the power transmitting coil 7 and causes the control device 5 to receive a signal, so that the foreign matter removing device 6 provided in the moving device 1 is Control. As a result, the foreign matter removing means 6 operates the rotary brush to sweep out foreign matter existing on the upper part of the power transmission coil 7 from the region between the power transmission coil 7 and the power reception coil 8 and remove it. Thereafter, the moving device 1 stops in a state of being interposed between the power transmission coil 7 and the power reception coil 8.

  In this state, the driver stops the vehicle 9 and manually operates the switch of the standby charging box 3 to start charging the vehicle 9. Since the vehicle 9 has a vehicle height higher than the ground and the power receiving coil 8 provided on the vehicle 9 is disposed at a position higher than the ground, the power transmitting coil main body 7b is changed to the power receiving coil main body 8b. It is in a state of being away from a distance where power can be supplied.

  Even when the vehicle 9 is charged, the relay coil body 2b of the relay coil 2 provided in the moving device 1 interposed between the power transmission coil 7 and the power receiving coil 8 provided on the ground transmits power. The coil 7 resonates with the magnetic field generated in the power transmission coil main body 7b, and a current flows through the relay coil main body 2b. The magnetic field generated by the current flowing through the relay coil main body 2b and the power receiving coil main body 8b of the power receiving coil 8 Resonates. Accordingly, even when the distance between the coils is increased and the coupling of the magnetic field is low, power can be supplied from the power transmitting coil body 7b to the power receiving coil body 8b.

  Further, at this time, the relay coil main body 2b is fixed to the moving device 1 that travels on the ground, and therefore is positioned horizontally with respect to the opposing surface of the power transmission coil main body 7b. Moreover, it is located substantially horizontal also with respect to the opposing surface of the coil main body 8b for electric power reception provided in the vehicle and facing the coil main body 7b for electric power transmission. That is, the relay coil main body 2b is inclined with respect to the opposing surfaces of the coil main bodies 7b and 8b and is moved in this state, unlike the “power transmission relay portion” provided inside the airbag. It is not disposed between 7b and 8b, but is disposed horizontally with respect to the opposing surfaces of both coil bodies 7b and 8b. Therefore, the relay coil body 2b is not different in distance from both the coil bodies 7b and 8b depending on the position of the surface, and is suitable for coupling both the coil bodies 7b and 8b and the magnetic field at any position on the surface. It is easy to become a distance. Accordingly, the relay coil body 2b is not prevented from relaying power supply, and power can be efficiently supplied from the power transmission coil body 7b to the power reception coil body 8b.

  Further, when the moving device 1 moves between the power transmitting coil 7 and the power receiving coil 8, the moving device 1 pushes out and removes the foreign matter interposed between them, so that the power transmitting coil body 7b and the power receiving coil are removed. It is possible to prevent the electromagnetic field from being shielded between the main bodies 8b, and it is possible to prevent the supply efficiency of the amount of electricity from the power transmitting coil main body 7b to the power receiving coil main body 8b from being lowered.

  Further, the foreign matter removing means 6 provided in the moving device 1 removes the fine foreign matter existing on the upper part of the power transmission coil 7 in addition to removing the foreign matter by pushing out the moving device 1, thereby further transmitting power. It is possible to prevent the electromagnetic field from being shielded between the coil main body 7b and the power receiving coil main body 8b. Thereby, the fall of the supply efficiency of the electric power from the coil main body 7b for electric power transmission to the coil main body 8b for electric power reception can be prevented.

  Furthermore, before charging the vehicle 9, the moving device 1 is waiting in the storage unit 13 provided in the standby charging box 3, so that foreign matter is prevented from being placed on the upper portion of the moving device 1. Therefore, it is possible to prevent the moving device 1 from moving between the power transmission coil 7 and the power reception coil 8 and foreign matter intervening between the power transmission coil 7 and the power reception coil 8. The shielding of the magnetic field generated in the coil body 8b can be prevented.

  Furthermore, the wheel 12, the drive source, the foreign matter removing means 6 and the control device 5 provided in the moving device 1 are provided outside the relay coil 2, and the relay coil main body provided inside the relay coil 2. 2b is comprised so that the magnitude | size of outer periphery may become larger than the outer periphery of the coil main body 7b for electric power transmission, and the coil main body 8b for electric power reception. Therefore, while electric power is being supplied from the power transmission coil body 7b to the power reception coil body 8b, the electromagnetic field generated between the power transmission coil body 7b and the power reception coil body 8b is removed from these wheels 12, the drive source, and foreign matter. It is not shielded by the means 6 and the control device 5. Thereby, the fall of the supply efficiency of the electric power from the coil main body 7b for electric power transmission to the coil main body 8b for electric power reception can be prevented.

  After the charging of the vehicle 9 is completed, a display (not shown) provided in the vehicle 9 notifies the driver that the charging has been completed. The driver who recognizes that the charging has been completed by the notification of the display device manually operates the switch of the standby charging box 3 in order to stop the power supply from the power transmitting coil body 7b to the power receiving coil body 8b. The charging of the vehicle 9 is stopped. After the driver confirms that the power supply to the standby charging box 3 has stopped, when the vehicle 9 is moved so that the power receiving coil 8 is separated from the power transmitting coil 7, the position detection device 4 is connected to the power receiving coil 8. Is detected to be separated from the power transmission coil 7 and transmits a signal to the control device 5 of the mobile device 1. The control device 5 records the distance from the storage unit 13 provided in the standby charging box 3 to the power transmission coil 7, and the control device 5 that receives the signal from the position detection device 4 is the drive source of the mobile device 1. The mobile device 1 is automatically moved to the standby charging box 3 into the storage unit 13 to be on standby. The mobile device 1 is charged by the standby charging box 3 while waiting in the storage unit 13.

  As described above, in the first embodiment, when the relay coil main body 2b fixed to the moving device 1 traveling on the ground is moved and arranged between the power transmitting coil main body 7b and the power receiving coil main body 8b. Since it is disposed horizontally with respect to the opposing surfaces of both coil bodies 7b and 8b, it is disposed at a distance that allows appropriate coupling of both coil bodies 7b and 8b and the magnetic field to any position on the surface of relay coil body 2b. The Therefore, the relay coil body 2b is not prevented from relaying power supply, and when power is transmitted from the power transmission coil body 7b, it can be efficiently supplied to the power receiving coil body 8b.

[Embodiment 2 of the Invention]
FIG. 7B shows a second embodiment of the present invention.

  The power transmission relay device 100 according to the second embodiment is different from the power transmission relay device 100 according to the first embodiment in place of the relay coil body 2b of the relay coil 2 fixed as the “power transmission relay unit”. As shown in FIG. 7B, the relay resonator 11 is fixed. The relay resonator 11 is configured as a resonator including a coil around which an electric wire is wound and a capacitor. When the relay resonator 11 is fixed as the “power transmission relay section”, the relay resonator 11 is different from the relay coil main body 2b, and the relay coil main body 2b is fixed in order to enable transmission at high output. Even when the power receiving coil main body 7b and the power receiving coil main body 8b of the power receiving coil 8 provided in the vehicle 9 are separated in the facing direction, the power receiving coil main body 7b is separated from the power receiving coil main body 7b. It becomes possible to transmit power to 8b with good supply efficiency.

  Moreover, although the standby charging box 3 is provided in the power transmission relay device 100 according to each of the above embodiments, the standby charging box 3 may not be provided depending on the configuration.

  Further, the power transmission relay device 100 according to each of the above embodiments is used in a non-contact power transmission device for charging a vehicle, but is not limited thereto, and is a large electronic product driven by an industrial robot or the like. You may use for the non-contact electric power transmission apparatus for charging.

  Note that each of the above embodiments is an exemplification of the present invention, and it is needless to say that the present invention is not limited to the above embodiment.

DESCRIPTION OF SYMBOLS 1 ... Moving device 2 ... Relay coil 2a ... Relay coil housing 2b ... Relay coil main body 3 ... Standby charging box 4 ... Position detection device 5 ... Control device 6. ··· Foreign matter removing means 7 ··· Coil for power transmission 7a · Case for power transmission coil 7b · Coil body for power transmission · 8 · Coil for power reception · 8a · Case for power reception coil 8b · · · Power receiving coil body 9 ... Vehicle 10 ... Body 11 ... Relay resonator 12 ... Wheel 13 ... Storage unit 100 ... Power transmission relay device

Claims (3)

  A moving device that moves between the power transmission coil and the power receiving coil, and a current that flows in resonance with the magnetic field generated in the power transmission coil, fixed to the moving device, and that is generated by the flowing current. A power transmission relay device comprising a power transmission relay unit that resonates with a coil and supplies power from the power transmission coil to the power reception coil.   A position detection device that detects that the power transmission coil and the power reception coil have moved to a position facing each other, and transmits a signal, and receives the signal from the position detection device and causes the movement device to control operation. The power transmission relay device according to claim 1, further comprising a control device that moves between the power receiving coil and the power transmitting coil.   The power transmission relay device according to claim 1 or 2, wherein the moving device is provided with foreign matter removing means for removing foreign matter interposed between the power transmission coil and the power receiving coil.

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