System, apparatus and method for supplying electric power, apparatus and method for receiving electric power

• US 10,559,978 B2
• Filed: 11/14/2017
• Issued: 02/11/2020
• Est. Priority Date: 03/03/2005
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kozuma, Yosuke, Nishikawa, Shinpei, Kimura, Shinji, Hori, Yusuke, Mikano, Goro, Iwasaki, Yuuki, Onitsuka, Shigetoshi
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Warmflash, Michael J
• Application Number:
  US15/812,763
• Publication Number:
  US 20180069422A1
• Time in Patent Office: 819 Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/00304 Overcurrent protection

Abstract

An electric power supply system includes an electric power reception apparatus and an electric power supply apparatus adapted to supply electric power to the electric power reception apparatus when the electric power reception apparatus is placed on the electric power supply apparatus. The electric power supply apparatus includes a plurality of electric power supply units adapted to supply electric power by electromagnetic induction to the electric power reception apparatus. A selection unit of the electric power supply apparatus selects, from the total plurality of electric power supply units, a plurality of electric power supply units whose location corresponds to a position where the electric power reception apparatus is placed, and a control unit controls the supply of electric power such that electric power is supplied to the electric power reception apparatus from the selected plurality of electric power supply units.

Claims

1. An electric power supply device, comprising:

at least one electric power supply section configured to supply electric power to at least one electric power reception device wirelessly;

a selection section configured to select the at least one electric power supply section for the supply of the electric power to the at least one electric power reception device wirelessly, wherein a location of the selected at least one electric power supply section is entirely within an area of the electric power reception device;

a detection section configured to detect a foreign substance; and

a control section configured to stop the electric power supplied to the at least one electric power reception device based on a presence of the foreign substance on a surface of the at least one electric power supply section, wherein the foreign substance is in contact with the surface of the at least one electrical power supply section.

2. The electric power supply device according to claim 1, further comprising a communication section configured to transmit or receive control information to control the supply of the electric power to the at least one electric power reception device, wherein the control section is further configured to transmit and receive information to or from the electric power reception device via the communication section to authenticate the electric power reception device.

3. The electric power supply device according to claim 1, further comprising a communication section configured to transmit or receive control information to control the supply of the electric power to the at least one electric power reception device,

wherein based on reception of information by the communication section from the electric power reception device, the selection section is further configured to select the at least one electric power supply section as a first electric power supply section at the location, and

wherein the at least one electric power supply section is further configured to generate a magnetic field at a point of time at which the communication section received the information.

4. The electric power supply device according to claim 3, wherein the control information is wirelessly transmitted from the electric power reception device such that the electric power is supplied to the electric power reception device from the selected at least one electric power supply section.

5. The electric power supply device according to claim 1, further comprising a communication section configured to transmit or receive control information to control the supply of the electric power to the at least one electric power reception device,

wherein the detection section is further configured to detect an overcurrent that flows through the at least one electric power supply section,

wherein based on the detection of the overcurrent by the detection section before reception of information by the communication section, the selection section is further configured to restrict the selection of the at least one electric power supply section through which the detected overcurrent flows, and

wherein the information indicates the supply of the electric power to the at least one electric power reception device.

6. The electric power supply device according to claim 1, wherein the at least one electric power supply section includes at least one coil.

7. The electric power supply device according to claim 6, wherein the at least one coil is further configured to generate a magnetic field.

8. The electric power supply device according to claim 1, further comprising a communication section configured to transmit or receive control information to control the supply of the electric power to the at least one electric power reception device.

9. The electric power supply device according to claim 1, wherein the control section is further configured to control the supply of the electric power based on control information.

10. An electric power reception device, comprising:

at least one electric power reception section configured to receive electric power supplied by at least one electric power supply section of an electric power supply device, wherein a location of the at least one electric power supply section is entirely within an area of the electric power reception device;

a detection section configured to detect a foreign substance; and

a control section configured to transmit information to indicate the foreign substance to the electric power supply device based on a presence of the foreign substance on a surface of the at least one electric power reception section, wherein the foreign substance is in contact with the surface of the at least one electric power reception section.

11. The electric power reception device according to claim 10, further comprising a communication section configured to transmit or receive the information to control the supply of the electric power, wherein, the control section is further configured to transmit and receive the information to or from the electric power supply device via the communication section to authenticate the electric power reception device.

12. The electric power reception device according to claim 10, wherein the electric power supply device includes at least one coil.

13. The electric power reception device according to claim 12, wherein the at least one coil is further configured to generate a magnetic field.

14. The electric power reception device according to claim 10, further comprising a communication section configured to transmit or receive the information to control the supply of the electric power.

15. The electric power reception device according to claim 10, wherein the control section is further configured to periodically transmit the information based on determination of the supply of the electric power from the electric power supply device.