Non-contact type charger, non-contact type battery, and non-contact type power transmission method

• US 9,929,583 B2
• Filed: 05/28/2015
• Issued: 03/27/2018
• Est. Priority Date: 09/12/2014
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Jeong, In Wha, Park, Jong Heum, Kim, Hugh
• Primary Examiner(s): Williams, Arun
• Application Number:
  US14/723,511
• Publication Number:
  US 20160079796A1
• Time in Patent Office: 1,034 Days
• Field of Search: 320108
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence

Abstract

A non-contact type power charger may include: 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 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 transmitted to each of the plurality of power receiving coils is controlled depending on coupling coefficients between the plurality of power transmitting coils and the plurality of power receiving coils.

Claims

1. A non-contact type charger comprising:

a plurality of power transmitting coils, each of the plurality of power transmitting coils configured to directly transmit power to a power receiving device in a non-contact manner; and

a power converting unit configured to control the power transmitted by the plurality of power transmitting coils, depending on coupling coefficients 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 update the coupling coefficients.

2. The non-contact type charger of claim 1, wherein the power converting unit updates the coupling coefficients according to a preset period.

3. The non-contact type charger of claim 1, wherein the power converting unit updates the coupling coefficients when a charging state is varied by a predetermined reference level or more.

4. The non-contact type charger of claim 1, 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 to control the power transmitted by a corresponding power transmitting coil.

5. The non-contact type charger of claim 4, wherein the switching control unit detects information regarding the transmitted power by using power state changes in the plurality of power transmitting coils, and calculates the coupling coefficients on the basis of the information.

6. The non-contact type charger of claim 4, wherein the switching control unit detects power state changes in the plurality of power transmitting coils to receive the coupling coefficients.

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

8. The non-contact type charger of claim 4, further comprising a communications unit receiving information regarding the transmitted power, and

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

9. The non-contact type charger of claim 4, 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.

10. The non-contact type charger of claim 4, 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.

11. A non-contact type battery comprising:

a plurality of power receiving coils, each of the plurality of power receiving coils configured to directly receive power from a power transmitting device in a non-contact manner;

a charging control unit configured to calculate a coupling coefficient between each of the plurality of power receiving coils and a corresponding power transmitting coil, depending on a state of the power received by each of the plurality of power receiving coils, convert the received power into charging power, and update the coupling coefficient; and

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

12. The non-contact type battery of claim 11, wherein the charging control unit updates the coupling coefficient according to a preset period.

13. The non-contact type battery of claim 11, wherein the charging control unit updates the coupling coefficient when a charging state is varied by a predetermined reference level or more.

14. The non-contact type battery of claim 11, 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 calculating the coupling coefficient depending on the state of the power received by the corresponding power receiving coil and controlling an operational state of at least one of the rectifying unit and the regulator depending on the state of the power.

15. The non-contact type battery of claim 14, wherein the control unit controls the operating 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 transmits information regarding the coupling coefficient.

16. The non-contact type battery of claim 11, wherein the charging control unit comprises a plurality of charging control units corresponding to the plurality of power receiving coils.

17. A non-contact type power charger comprising:

a power transmitting device including a plurality of power transmitting coils, each of the plurality of power transmitting coils configured to directly transmit power to a power receiving device in a non-contact manner; and

the power receiving device including a plurality of power receiving coils, each of the plurality of power receiving coils configured to directly receive the power from the power transmitting device 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 transmitted to each of the plurality of power receiving coils is controlled depending on coupling coefficients between the plurality of power transmitting coils and the plurality of power receiving coils, and

the coupling coefficients are updated under predetermined conditions.

18. The non-contact type power charger of claim 17, 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 set 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.

19. The non-contact type power charger of claim 17, 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 set 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.

20. The non-contact type power charger of claim 17, wherein the coupling coefficients are updated according to a preset period.

21. The non-contact type power charger of claim 17, wherein the coupling coefficients are updated when a charging state is varied by a predetermined reference level or more.

22. A non-contact type power transmission method performed by a non-contact type charger or a non-contact type battery comprising:

detecting power states of a plurality of power transmitting coils, each of the plurality of power transmitting coils configured to directly transmit power to a power receiving device in a non-contact manner and power states of a plurality of power receiving coils, each of the plurality of power receiving coils configured to directly receive the power transmitted by the plurality of power transmitting coils of a power transmitting device and transferring the power to a plurality of battery cells respectively connected thereto; and

calculating coupling coefficients between the plurality of power transmitting coils and the plurality of power receiving coils, depending on the detected power states.

23. The non-contact type power transmission method of claim 22, wherein the calculating of the coupling coefficients includes selectively operating one of the plurality of power transmitting coils to set 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.

24. The non-contact type power transmission method of claim 22, wherein the calculating of the coupling coefficients includes selectively varying a level of the power transmitted by one of the plurality of power transmitting coils to set a power receiving coil, receiving power having the highest amount of change 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.

25. The non-contact type power transmission method of claim 22, wherein the power states of the plurality of power transmitting coils and the power states of the plurality of power receiving coils are detected according to a preset period.

26. The non-contact type power transmission method of claim 22, wherein the power states of the plurality of power transmitting coils and the power states of the plurality of power receiving coils are detected when a charging state is varied.