Non-contact power transmission apparatus

• US 10,886,780 B2
• Filed: 11/22/2016
• Issued: 01/05/2021
• 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): Fureman, Jared
• Assistant Examiner(s): Barnett, Joel
• Application Number:
  US15/358,436
• Publication Number:
  US 20170141617A1
• Time in Patent Office: 1,505 Days
• Field of Search: None
• 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 method of operating a non contact power transmission apparatus comprising:

detecting a load change of a primary core in the non-contact power transmission apparatus when an object is placed adjacent the primary core;

in response to detecting the load change, transmitting an ID requesting signal via the primary core to the object;

receiving an ID response signal from the object; and

transmitting the wireless power signal via the primary core to the object in response to the ID response signal from the object;

wherein transmitting the ID requesting signal comprises;

transmitting a header ID requesting signal; and

transmitting a full ID requesting signal if a header ID code is received from the object in response to the header ID requesting signal.

2. The method of claim 1, comprising:

receiving a pulse signal from the object, wherein the pulse signal is generated based on a comparison result of the wireless power signal and a reference voltage; and

controlling an intensity of the wireless power signal according to the pulse signal.

3. The method of claim 2, comprising extracting a code data from the pulse signal.

4. The method of claim 2, wherein the pulse signal comprises any one of a power-off code, a power-up code, a gauge code, and a power-down code.

5. A non-transitory computer readable medium comprising instructions to direct a controller to:

detect a load change of a primary core in a non-contact power transmission apparatus when an object is placed adjacent the primary core;

transmit an ID requesting signal via the primary core to the object in response to the load change;

receive an ID response signal from the object; and

transmit the wireless power signal via the primary core to the object in response to the ID response signal from the object;

wherein to transmit the ID requesting signal, the instructions direct the controller to;

transmit a header ID requesting signal; and

transmit a full ID requesting signal if a header ID code is received from the object in response to the header ID requesting signal.

6. The computer readable medium of claim 5, comprising instructions to direct the controller to:

receive a pulse signal from the object, wherein the pulse signal is generated based on a comparison result of the wireless power signal and a reference voltage; and

control an intensity of the wireless power signal according to the pulse signal.

7. The computer readable medium of claim 6, comprising instructions to direct the controller to extract a code data from the pulse signal.

8. The computer readable medium of claim 6, wherein the pulse signal comprises any one of a power-off code, a power-up code, a gauge code, and a power-down code.