Wireless power supplying system

• US 9,166,413 B2
• Filed: 01/07/2011
• Issued: 10/20/2015
• Est. Priority Date: 01/15/2010
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hashiguchi, Takaaki
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): PEREZ BORROTO, ALFONSO
• Application Number:
  US12/986,634
• Publication Number:
  US 20110175455A1
• Time in Patent Office: 1,747 Days
• Field of Search: 307/104, 307/149, 307/151
• US Class Current: 1/1
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

Disclosed herein is a wireless power supplying system, including a power transmission device adapted to transmit power supplied thereto, a repeater device adapted to repeat the transmission power of the power transmission device, and a power reception device adapted to receive the power repeated by said repeater device.

Claims

1. A wireless power supplying system, comprising:

a power transmission device configured to transmit power supplied thereto;

a repeater device configured to repeat the transmitted power of said power transmission device; and

a power reception device configured to receive the power repeated by said repeater device;

wherein

said power transmission device includes a first resonance element for receiving the power supplied to the power transmission device and transmitting the received power,

said repeater device includes a second resonance element for receiving and transmitting the power transmitted to the repeater device through a magnetic field resonance relationship,

said power reception device includes a third resonance element for receiving the power transmitted to the power reception device from said repeater device through the magnetic field resonance relationship,

at least one of said power transmission and power reception devices includes a directional coupler configured to detect passing and reflected power and supply a control signal indicating a power transmission efficiency, and

said repeater device includes a driving section configured to adjust a linear position of said second resonance element by displacing said second resonance element along a plurality of planar directions in response to the control signal.

2. The wireless power supplying system according to claim 1, wherein:

(a) said power transmission device includes

(1) a power generation section configured to generate power to be supplied to said first resonance element,

(2) a variable matching section having an impedance matching function configured to match the impedance at a power supplying point of said first resonance element in accordance with the control signal, and

(3) a first control section configured to receive the result of the detection and output the control signal to said variable matching section so as to raise the power transmission efficiency by impedance matching by said variable matching section based on the received result of the detection; and

(b) said repeater device includes a second control section configured to receive the control signal and control said driving section so as to adjust at least one of an angle and the linear position of said second resonance element based on the power transmission efficiency indicated in the control signal.

3. The wireless power supplying system according to claim 2, wherein said repeater device is integrated with said power transmission device or said power reception device.

4. The wireless power supplying system according to claim 2, wherein the first and second control sections of the respective power transmission device and the repeater device are integrated.

5. The wireless power supplying system according to claim 1, wherein:

(a) said power reception device includes

(1) a variable matching section having an impedance matching function configured to match the impedance at a connection portion of said third resonance element to a load in response to the control signal, and

(2) a first control section configured to receive the result of the detection and output the control signal to said variable matching section so as to raise the power transmission efficiency by impedance matching by said variable matching section based on the received result of the detection; and

(b) said repeater device includes a second control section configured to receive the control signal and control said driving section so as to adjust at least one of an angle and the linear position of said second resonance element based on the power transmission efficiency indicated in the control signal.

6. The wireless power supplying system according to claim 5, wherein said repeater device is integrated with said power transmission device or said power reception device.

7. The wireless power supplying system according to claim 5, wherein the first and second control sections of the respective power reception device and the repeater device are integrated.

8. The wireless power supplying system according to claim 1, wherein:

(a) said power transmission device includes

(1) a power generation section configured to generate power to be supplied to said first resonance element,

(2) a first variable matching section having an impedance matching function configured to match the impedance at a power supplying point of said first resonance element in accordance with the control signal, and

(3) a first control section configured to receive the result of the detection and output the control signal to said first variable matching section so as to raise the power transmission efficiency by impedance matching by said first variable matching section based on the received result of the detection;

(b) said power reception device includes

(1) a second variable matching section having an impedance matching function configured to match the impedance at a connection portion of said third resonance element to a load in response to a control signal, and

(2) a second control section configured to receive the result of the detection and output the control signal to said second variable matching section so as to raise the power transmission efficiency by impedance matching by said second variable matching section based on the received result of the detection; and

(c) said repeater device includes a third control section configured to receive the control signal and control said driving section so as to adjust at least one of an angle and the linear position of said second resonance element based on the power transmission efficiency indicated in the control signal.

9. The wireless power supplying system according to claim 8, wherein said repeater device is integrated with said power transmission device or said power reception device.

10. The wireless power supplying system according to claim 9, wherein the control sections of the respective integrated devices are integrated.