Non-contact charging station with planar spiral power transmission coil and method for controlling the same

• US 9,130,395 B2
• Filed: 01/06/2012
• Issued: 09/08/2015
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: Hanrim Postech Co., Ltd.
• Inventors: Jung, Chun-Kil
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): TORRES RUIZ, JOHALI ALEJANDRA
• Application Number:
  US13/344,741
• Publication Number:
  US 20120098486A1
• Time in Patent Office: 1,341 Days
• Field of Search: 320/108
• US Class Current: 1/1
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• 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 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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

Abstract

Various embodiments of a non-contact power transmission station with a planar spiral power transmission coil are disclosed. In one exemplary embodiment, a non-contact power transmission station may include: a transmission controller for transmitting power to a non-contact power-receiving apparatus and transmitting/receiving data; and a station part electrically connected with the transmission controller to generate an induced magnetic field and transmit power to the non-contact power-receiving apparatus, which is disposed on a top thereof. The station part may include a primary core where the induced magnetic field is generated. The primary core may include a core base, a central coil and two side coils which are fastened to the station part. The central coil and the two side coils may selectively generate an induced magnetic field under control of the transmission controller.

Claims

1. A non-contact power-receiving apparatus which receives induced electric power for charging from a non-contact charging station, the power signal being caused by an induced magnetic field, the non-contact power-receiving apparatus comprising:

a secondary core which receives a first signal for selecting a primary core from each of multiple primary cores included in the non-contact charging station in a standby mode, transmits a response signal including information on received signal intensity of the first signal to the non-contact charging station, and transmits a second signal for power control including information regarding a degree of voltage calibration to the non-contact charging station in a charging mode;

a rectifier block connected with the secondary core to rectify an induced current in the secondary core; and

a controller which detects the received signal intensity of the first signal and, processes the response signal in the standby mode and the second signal in the charging mode,

wherein the secondary core includes a shielding section for shield the magnetic field, from other electronic elements mounted on the non-contact power-receiving apparatus,

wherein the secondary core receives the induced electric power for charging from a primary core which is selected based on the information on the received signal intensity of the first signal and receives a compensated electric power according to the information regarding the degree of voltage calibration from the non-contact power charging station in the charging mode,

wherein charging operation is stopped when it is detected that metallic object other than the non-contact power-receiving apparatus is placed on the non-contact power charging station, and

wherein the selected primary core has the best received signal intensity for the first signal among the multiple primary cores.

2. The non-contact power-receiving apparatus in accordance with claim 1, wherein the response signal further includes a unique ID of the non-contact power-receiving apparatus.

3. The non-contact power-receiving apparatus in accordance with claim 1, further comprises:

a charge circuit block allowing electric power supplied from the rectifier block to be charged to a battery cell; and

a charge monitor circuit block monitoring a level of charge of the battery cell.

4. The non-contact power-receiving apparatus in accordance with claim 1, wherein the shielding section includes a shielding panel, a shielding mesh, and a metal thin film.

5. The non-contact power-receiving apparatus in accordance with claim 1, wherein the secondary core has a pattern core on a printed circuit board base, which is fastened to an inside of the non-contact power-receiving apparatus, and wherein the pattern core comprises a planar-spiral power transmission core.

6. The non-contact power-receiving apparatus in accordance with claim 1, wherein the response signal further includes a unique ID of each of the multiple primary cores.

7. A method of receiving induced electric power for charging from multiple primary cores of a non-contact charging station performed by a non-contact power-receiving apparatus, the method comprising:

receiving, at a secondary core of the non-contact power-receiving apparatus, a first signal for selecting a primary core from each of multiple primary cores in a standby mode;

detecting received signal intensity of the first signal in the standby mode;

transmitting, to the non-contact charging station, a response signal including information on received signal intensity of the first signal in the standby mode;

receiving at the secondary core, the induced electric power for charging from a primary core which is selected based on the information on the received signal intensity of the first signal in a charging mode, wherein the selected primary core has the best received signal intensity for the first signal among the multiple primary cores;

transmitting, to the non-contact charging station, a second signal for power control including information regarding a degree of voltage calibration; and

receiving at the secondary core, a compensated electric power according to the information regarding the degree of voltage calibration from the non-contact power charging station in the charging mode,

wherein the secondary core includes a shielding section for shield a magnetic field, from other electronic elements mounted on the non-contact power-receiving apparatus, and

wherein charging operation is stopped when it is detected that metallic object other than the non-contact power-receiving apparatus is placed on the non-contact power charging station.

8. The method in accordance with claim 7, wherein the response signal further includes a unique ID of each of the multiple primary cores.