Non-contact power transmission apparatus

• US 9,269,490 B2
• Filed: 04/05/2013
• Issued: 02/23/2016
• 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:
  US13/857,858
• Publication Number:
  US 20140139033A1
• Time in Patent Office: 1,054 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 receiving apparatus comprising:

a secondary core configured to receive a signal requesting an ID code of the non-contact power receiving apparatus; and

an ID transmitter configured to generate a header ID code or a full ID code of the non-contact power receiving apparatus and to transmit the header ID code or the full ID code via the secondary core;

wherein the ID transmitter transmits the header ID code in response to a first signal requesting the header ID code, and transmits the full ID code in response to a second signal requesting the full ID code,

wherein the secondary core receives a wireless power from a non-contact power transmission apparatus when the non-contact power transmission apparatus receives the full ID code normally.

2. The apparatus of claim 1, wherein the ID transmitter transmits the header ID code when the non-contact power receiving apparatus receives the first signal requesting the header ID code while the non-contact power receiving apparatus is in standby mode.

3. A method of transmitting wireless power to a non-contact power receiving apparatus, the method comprising:

generating a signal requesting an ID code, in the form of either a header ID code or a full ID code, of the non-contact power receiving apparatus;

transmitting the request signal via a primary core;

checking whether the full ID code is received normally; and

transmitting a wireless power to the non-contact power receiving apparatus when the full ID code is received normally,

wherein the transmission of the request signal comprises;

transmitting a first signal requesting the header ID code; and

transmitting a second signal requesting the full ID code when the header ID code is received normally.

4. The method of claim 3, further comprising:

detecting a change in the load of the primary core; and

determining whether the change is induced by the non-contact power receiving apparatus,

wherein a secondary core receives the wireless power from a non-contact power transmission apparatus when the non-contact power transmission apparatus receives the full ID code normally.

5. The method of claim 4, wherein the transmission of the first signal requesting the header ID code occurs only when the change in the load is induced by the non-contact power receiving apparatus.

6. A method of receiving wireless power from a non-contact power transmission apparatus, the method comprising:

receiving via a secondary core a signal requesting an ID code of a non-contact power receiving apparatus;

generating a header ID code or a full ID code of the non-contact power receiving apparatus;

transmitting the header ID code or the full ID code via the secondary core; and

receiving a wireless power from the non-contact power transmission apparatus when the non-contact power transmission apparatus receives the full ID code normally;

wherein the transmission of the header ID code or the full ID code comprises;

transmitting the header ID code in response to a first signal requesting the header ID code; and

transmitting the full ID code in response to a second signal requesting the full ID code.

7. The method of claim 6, wherein the transmitting of the header ID code occurs when the non-contact power receiving apparatus receives the first signal requesting the header ID code while the non-contact power receiving apparatus is in standby mode.