Non-contact type charger and non-contact type battery

• US 10,003,212 B2
• Filed: 05/28/2015
• Issued: 06/19/2018
• Est. Priority Date: 09/11/2014
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, In Wha, Park, Jong Heum, Kim, Hugh
• Primary Examiner(s): Diao, M'Baye
• Application Number:
  US14/723,535
• Publication Number:
  US 20160079797A1
• Time in Patent Office: 1,118 Days
• Field of Search: 320108, 307104, 455 411, 455573
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/0018 using separate charge circuits

Abstract

There is provided a non-contact type charger including: a plurality of power transmitting coils transmitting power in a non-contact manner; and a power converting unit controlling the power transmitted by the plurality of power transmitting coils depending on coupling coefficients, wherein the coupling coefficients are set by transmitting power state information between each of the plurality of power transmitting coils and a plurality of power receiving coils which receive the power transmitted by the plurality of power transmitting coils to charge a plurality of battery cells connected thereto with the power.

Claims

1. A non-contact type charger comprising:

a plurality of power transmitting coils transmitting power in a non-contact manner; and

a power converting unit controlling the power transmitted by the plurality of power transmitting coils depending on coupling coefficients,

wherein the coupling coefficients are calculated on the basis of power state information of the plurality of power transmitting coils and a plurality of power receiving coils which receive the power transmitted by the plurality of power transmitting coils to charge a plurality of battery cells connected thereto with the power,

wherein the power converting unit includes;

a switching unit switching the power transmitted by the plurality of power transmitting coils; and

a switching control unit controlling the power switching of the switching unit, depending on the coupling coefficients.

2. The non-contact type charger of claim 1, wherein the switching control unit selectively operates one of the plurality of power transmitting coils to calculate the coupling coefficients between the corresponding power transmitting coil and the plurality of power receiving coils.

3. The non-contact type charger of claim 1, wherein the switching control unit selectively varies power transmitted by one of the plurality of power transmitting coils to calculate the coupling coefficients between the corresponding power transmitting coil and the plurality of power receiving coils.

4. The non-contact type charger of claim 1, further comprising a communications unit receiving the coupling coefficients.

5. The non-contact type charger of claim 1, further comprising a communications unit receiving information regarding the received power, and

the switching control unit calculates the coupling coefficients on the basis of the information received from the communications unit.

6. A non-contact type charger comprising:

a power unit supplying direct current (DC) power;

a switching unit switching the DC power supplied by the power unit;

a plurality of power transmitting coils transmitting the power in a non-contact manner, depending on the power switching of the switching unit;

a detecting unit detecting power state changes in the plurality of power transmitting coils to provide power state information to be transmitted between each of the plurality of power transmitting coils and a plurality of power receiving coils which receive the power transmitted by the plurality of power transmitting coils to charge a plurality of battery cells connected thereto with the power; and

a control unit controlling the power switching of the switching unit based on coupling coefficients between the plurality of power transmitting coils and the plurality of power receiving coils, depending on a detection result of the detecting unit.

7. The non-contact type charger of claim 6, wherein the control unit selectively operates one of the plurality of power transmitting coils to calculate coupling coefficients between the corresponding power transmitting coil and the plurality of power receiving coils.

8. The non-contact type charger of claim 6, wherein the control unit selectively varies power transmitted by one of the plurality of power transmitting coils to calculate coupling coefficients between the corresponding power transmitting coil and the plurality of power receiving coils.

9. The non-contact type charger of claim 6, wherein the detecting unit detects power states of the plurality of power transmitting coils which are varied depending on power state changes in the plurality of power receiving coils receiving the power transmitted by the plurality of power transmitting coils.

10. A non-contact type battery comprising:

a plurality of power receiving coils receiving power from at least one of a plurality of power transmitting coils in a non-contact manner, depending on coupling coefficients calculated by power state information transferred between a power receiving side and a power transmitting side;

a charging control unit converting the received power into charging power; and

a plurality of battery cells receiving the charging power from the charging control unit to be charged with the charging power,

wherein the charging control unit includes;

a rectifying unit rectifying the power received from a corresponding power receiving coil;

a regulator regulating the power rectified by the rectifying unit into the charging power; and

a control unit controlling an operational state of at least one of the rectifying unit and the regulator, depending on a state of the power received by the corresponding power receiving coil,

wherein the control unit calculates a coupling coefficient between the corresponding power receiving coil and the corresponding power transmitting coil, depending on the state of the power received by the corresponding power receiving coil, and controls the operational state of at least one of the rectifying unit and the regulator to adjust the state of the power received by the corresponding power receiving coil and transmit information regarding the coupling coefficient to the power transmitting side.

11. The non-contact type battery of claim 10, further comprising a communications unit transmitting the power state information to the power transmitting side.

12. The non-contact type battery of claim 10, wherein the charging control unit comprises a plurality of charging control units corresponding to the plurality of power receiving coils.

13. A non-contact type charger comprising:

a power transmitting device including a plurality of power transmitting coils transmitting power in a non-contact manner; and

a power receiving device including a plurality of power receiving coils receiving the power transmitted by the plurality of power transmitting coils in a non-contact manner to charge a plurality of battery cells, respectively connected to the plurality of power receiving coils, with the power,

wherein the power charged in each of the plurality of battery cells is controlled depending on coupling coefficients between the plurality of power transmitting coils and the plurality of power receiving coils,

wherein the power transmitting device and the power receiving device perform bidirectional communications to calculate a coupling coefficient therebetween.

14. The non-contact type charger of claim 13, wherein at least one of the power transmitting device and the power receiving device selectively operates one of the plurality of power transmitting coils to calculate a power receiving coil, receiving the highest level of power from the selected power transmitting coil among the plurality of power receiving coils, as having a high coupling coefficient with the corresponding power transmitting coil.

15. The non-contact type charger of claim 13, wherein at least one of the power transmitting device and the power receiving device selectively varies a level of power transmitted by one of the plurality of power transmitting coils to calculate a power receiving coil, having the highest amount of change in levels of the power received from the selected power transmitting coil among the plurality of power receiving coils, as having a high coupling coefficient with the corresponding power transmitting coil.

16. The non-contact type charger of claim 13, wherein the coupling coefficients are calculated by power state changes in the plurality of power transmitting coils of the power transmitting device generated by the plurality of power receiving coils of the power receiving device.