POWER TRANSMISSION CONTROL DEVICE, POWER TRANSMISSION DEVICE, POWER RECEPTION CONTROL DEVICE, POWER RECEPTION DEVICE, AND ELECTRONIC APPARATUS

• US 20090325651A1
• Filed: 06/23/2009
• Published: 12/31/2009
• Est. Priority Date: 06/25/2008
• Status: Active Grant

• Current Assignee: 138 East LCD Advancements Limited (Vector Capital Corporation)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: KAMIJO, Takahiro, KAMIYAMA, Masayuki, ONISHI, Kota, SHIOZAKI, Nobutaka, KONDO, Yoichiro
• Granted Patent: US 8,406,823 B2
• Time in Patent Office: Days
• US Class Current: 455/573
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A power transmission control device is provided in a contactless power transmission system that supplies electric power to a load of a power reception device such that a primary coil and a secondary coil are electromagnetically coupled to each other so as to transmit the electric power to the power reception device from the power transmission device. The power transmission control device includes a controller that controls the power transmission control device, and a storage section that stores information about a power transmitting side coil. The controller performs a collation process for collating the information about the power transmitting side coil with information about a power receiving side coil received from the power reception device, and determines whether or not the information about the power transmitting side coil is compatible with the information about the power receiving side coil.

Claims

1. A power transmission control device in a contactless power transmission system that supplies electric power to a load of a power reception device such that a primary coil and a secondary coil are electromagnetically coupled to each other so as to transmit the electric power to the power reception device from a power transmission device, the power transmission control device comprising:

a controller that controls the power transmission control device; and

a storage section that stores information about a power transmitting side coil,

the controller collating the information about the power transmitting side coil with information about a power receiving side coil received from the power reception device, and the controller determining whether or not the information about the power transmitting side coil is compatible with the information about the power receiving side coil.

2. The power transmission control device according to claim 1,

the storage section storing first identification information about the primary coil provided to the power transmission device as the information about the power transmitting side coil, the controller determining that the information about the power transmitting side coil is compatible with the information about the power receiving side coil in a case where the information about the power transmitting side coil is matched to the information about the power receiving side coil, and the information about the power receiving side coil is second identification information that is the identification information about the primary coil to which the power reception device is adaptable.

3. The power transmission control device according to claim 1,

the controller transmitting the information about the power transmitting side coil stored in the storage section to the power reception device in a case where it is determined that the information about the power transmitting side coil is compatible with the information about the power receiving side coil.

4. The power transmission control device according to claim 3,

the controller detecting a foreign object before transmitting the information about the power transmitting side coil to the power reception device, and the controller transmitting the information about the power transmitting side coil to the power reception device in a case where the foreign object is not detected.

5. The power transmission control device according to claim 3,

the storage section storing a plurality of pieces of information about the power transmitting side coil, and the controller transmits, to the power reception device, information about the coil that is selected from the plurality of pieces of information about the power transmitting side coil and is compatible with the information about the power receiving side.

6. The power transmission control device according to claim 1,

the controller collating the information about the power transmitting side coil with the information about the power receiving side coil before starting normal transmission of electric power to the power reception device from the power transmission device, and starts the normal transmission of electric power in a case where it is determined that the information about the power transmitting side coil is compatible with the information about the power receiving side coil.

7. A power transmission device comprising:

the power transmission control device according to claim 1; and

a power transmission section that generates an alternating current (AC) voltage and supply the AC voltage to the primary coil.

8. An electronic apparatus, comprising

the power transmission device according to claim 7.

9. A power reception control device that is in a contactless power transmission system that causes a power transmission device to transmit electric power to a power reception device so as to supply the electric power to a load of the power reception device by electromagnetically coupling a primary coil to a secondary coil, the power reception control device comprising:

a controller that controls the power reception control device; and

a storage section that stores information about a power receiving side coil,

the controller transmitting the information about the power receiving side coil stored in the storage section to the power transmission device.

10. The power reception control device according to claim 9,

the storage section storing identification information about the primary coil as the information about the power receiving side coil to which the power reception device is adaptable, and the controller transmitting the identification information about the primary coil to the power transmission device.

11. The power reception control device according to claim 10,

in a case where first to N-th types of secondary coils are adaptable to a first type of primary coil and the secondary coil of the power reception device is either one of the first to N-th types of the secondary coils, the controller transmitting the identification information about first type of the primary coil as the information about the power receiving side coil.

12. The power reception control device according to claim 9,

the controller collating information about a power transmitting side coil with the information about the power receiving side coil in a case where the controller receives the information about the power transmitting side coil from the power transmission device, and determines whether or not the information about the power transmitting side coil is compatible with the information about the power receiving side coil.

13. The power reception control device according to claim 9,

the controller transmitting the information about the power receiving side coil to the power transmission device in a case where it is determined whether or not a positional relationship between the primary coil and the secondary coil is adequate and it is determined that the positional relationship is adequate.

14. The power reception control device according to claim 9,

the controller transmitting the information about the power receiving side coil to the power transmission device before normal transmission of electric power to the power reception device from the power transmission device is started.

15. The power reception control device according to claim 9,

the power reception device including a coil unit having the secondary coil mounted thereon and a control unit having the power reception control device mounted thereon, the coil unit being provided with a coil information recording section having the information about the power receiving side coil recorded therein, and the controller transmitting the information about the power receiving side coil recorded in the coil information recording section to the power transmission device.

16. A power reception device, comprising:

the power reception control device according to claim 9; and

the power reception section that converts an induction voltage of the secondary coil to a direct current (DC) voltage.

19. An electronic apparatus comprising:

the power reception device according to claim 16; and

a load to which electric power is supplied from the power reception device.

17. A power reception device in a contactless power transmission system that transmits electric power to a power reception device from a power transmission device so as to supply the electric power to a load of the power reception device by electromagnetically coupling a primary coil to a secondary coil, the power reception device comprising

a coil unit having the secondary coil mounted thereon;

a control unit having the power reception control device mounted thereon; and

a coil information recording section that has information about a power receiving side coil recorded therein and is provided to the coil unit,

the power reception control device transmitting the information about the power receiving side coil recorded in the coil information recording section to the power transmission device.

18. The power reception device according to claim 17,

identification information about the primary coil to which the power reception device is adaptable being recorded in the coil information recording section as the information about the power receiving side coil, and the power reception control device transmitting the identification information about the primary coil to the power transmission device.