Non-contact power transmission apparatus

• US 9,531,197 B2
• Filed: 07/13/2015
• Issued: 12/27/2016
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Jung, Chun-Kil, Kuk, Yoon-Sang
• Primary Examiner(s): KAPLAN, HAL IRA
• Application Number:
  US14/798,440
• Publication Number:
  US 20150318715A1
• Time in Patent Office: 533 Days
• Field of Search: 307/104
• US Class Current: 1/1
• CPC Class Codes: H01F 37/00 Fixed inductances not covered by group H01F17/00
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 2310/22 The load being a portable electronic device
• CPC Class Codes: H02J 3/322 the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A non-contact power transmission apparatus accurately determines the kind of object that is placed on the charging deck of the non-contact power transmission apparatus, and, only when a non-contact power receiving apparatus is placed on the power transmission apparatus, allows power transmission and data communication to take place, thereby accurately determining the state of the receiver side and efficiently controlling the transmission of power. In the power transmission apparatus, the power supplied to the non-contact power receiving apparatus is measured, and the output power of the wireless power signal output from two different cores is controlled, thereby allowing the charging operation to be stably conducted even if the non-contact power receiving apparatus is moved anywhere on the power transmission apparatus. The power transmission apparatus improves both the reliability of operation of the non-contact charging system, and the competitiveness of related products, such as portable terminals, battery packs and the like.

Claims

1. A non-contact power transmission apparatus comprising:

a board comprising a control module;

a shielding plate disposed on the board; and

a primary core located on the shielding plate and configured to electrically connect to the control module, the primary core comprising a first power transmission core and a second power transmission core,

wherein an overlapping region is formed between the first power transmission core and the second power transmission core,

wherein the control module is configured to detect an object, and determine that the object is a wireless power receiving device, and

wherein the primary core is configured to transmit a wireless power signal via at least one of the first power transmission core and the second power transmission core to the wireless power receiving device.

2. The apparatus of claim 1, wherein the control module detects the object based on a change in the load of the primary core.

3. The apparatus of claim 1, wherein the control module is configured to control each of the first power transmission core and the second power transmission core to transmit ID requesting signal.

4. The apparatus of claim 3, wherein the control module is configured to select at least one of the first power transmission core and the second power transmission core.

5. The apparatus of claim 4, wherein the control module is configured to control at least one of the first power transmission core and the second power transmission core to receive ID response signal, and

wherein the control module selects at least one of the first power transmission core and the second power transmission core which received the ID response signal.

6. The apparatus of claim 4, wherein the control module is configured to control the primary core to transmit the wireless power signal via the selected at least one of the first power transmission core and the second power transmission core.

7. The apparatus of claim 6, wherein if the primary core transmits the wireless power signal via selected both of the first power transmission core and the second power transmission core, the control module controls the sum of output power of the first power transmission core and the second power transmission core to correspond to a predetermined value.

8. The apparatus of claim 6, wherein the wireless power receiving device comprises a power receiving core, and

wherein the control module selects both of the first power transmission core and the second power transmission core, if the power receiving core is positioned in the overlapping region.

9. The apparatus of claim 3, wherein the control module determines that the object is the wireless power receiving device based on ID response signal.

10. The apparatus of claim 3, wherein the control module is configured to determine that the object is foreign substance if both of the first power transmission core and the second power transmission core do not receive ID response signal corresponding to the ID requesting signal.

11. The apparatus of claim 4, wherein, the control module is configured to receive a power control requesting signal from the wireless power receiving device and to control an intensity of the wireless power signal based on the power control requesting signal, and the power control requesting signal is generated by comparing the received wireless power signal with a predetermined voltage.

12. A method of transmitting wireless power by a non-contact power transmission apparatus having a primary core comprising:

detecting an object;

determining that, the object is a wireless power receiving device; and

transmitting a wireless power signal to the wireless power receiving device,

wherein the primary core comprises a first power transmission core and a second power transmission core, an overlapping region is formed between the first power transmission core and the second power transmission core, and the wireless power signal is transmitted via at least one of the first power transmission core and the second power transmission core.

13. The method of claim 12, wherein the object is detected based on a change in the load of the primary core.

14. The method of claim 12, further comprising:

controlling each of the first power transmission core and the second power transmission core to transmit ID requesting signal.

15. The method of claim 14, further comprising:

selecting at least one of the first power transmission core and the second power transmission core.

16. The method of claim 15, further comprising:

controlling at least one of the first power transmission core and the second power transmission core to receive ID response signal, and

selecting at least one of the first power transmission core and the second power transmission core which received the ID response signal.

17. The method of claim 15, further comprising:

transmitting the wireless power signal via the selected at least one of the first power transmission core and the second power transmission core.

18. The method of claim 17, further comprising:

controlling the sum of output power of the first power transmission core and the second power transmission core to correspond to a predetermined value if the wireless power signal is transmitted via both of the first power transmission core and the second power transmission core.

19. The method of claim 17, wherein both of the first power transmission core and the second power transmission core are selected if the power receiving device is positioned in the overlapping region.

20. The method of claim 14, wherein the object is determined as the wireless power receiving device based on ID response signal.