Wireless charging system having different charging modes

• US 9,438,067 B2
• Filed: 08/28/2012
• Issued: 09/06/2016
• Est. Priority Date: 08/29/2011
• Status: Active Grant

• Current Assignee: KthePower, Inc.
• Original Assignee: KthePower, Inc.
• Inventors: Na, Gi-Yong, Kim, Si-Han
• Primary Examiner(s): Williams, Arun
• Application Number:
  US14/241,758
• Publication Number:
  US 20140210406A1
• Time in Patent Office: 1,470 Days
• Field of Search: 320/108
• US Class Current: 1/1
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• 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 7/007182 in response to battery voltage

Abstract

Provided is a wireless charging system having different wireless modes, the system comprising: a method of providing a coil having different charging modes in one set, which is performed by providing separate coils or providing a lead wire in the middle of one coil, when the coil having at least two different charging modes is provided in the one set in a receiver for the wireless charging system using non-contact magnetic induction, wherein when one charging mode is selected for one coil set, a status value of the coil for transmitting and receiving wireless power energy is detected, thereby enabling the one charging mode to be selected, and different charging modes is mounted in one wireless charging system so that a charging mode appropriate for optimum conditions can be selected according to states and charging conditions wireless power transmitting and receiving devices.

Claims

1. A wireless charging transmitter comprising:

at least an antenna set having a base plate, a first antenna formed on the base plate which transmits a wireless charging energy at a frequency less than 1 MHz, and a second antenna formed on the base plate which transmits the wireless charging energy at a frequency more than 1 MHz;

a sensor sensing at least a sense value selected from currents, impedances, capacities, voltages and frequencies of the first antenna and the second antenna;

a MCU selecting a charging mode using the sense value sensed from the sensor; and

a switch selecting the first antenna or the second antenna according to the charging mode.

2. The wireless charging transmitter of claim 1,

wherein a spiral shape antenna having one end terminal at a center and the other end terminal at an outermost end is provided on the base plate and the first antenna has two lead wires connected to one end terminal and the other end terminal, and the second antenna has at least a lead wire connected to the selected mid-point between one end terminal and the other end of the spiral shape antenna.

3. The wireless charging transmitter of claim 2,

wherein at least two antenna sets are provided and a part of an area occupied by each antenna set overlap each other.

4. The wireless charging transmitter of claim 2, wherein the first antenna is a WPC antenna.

5. A wireless charging system having a wireless charging transmitter and a wireless charging receiver,

wherein the wireless charging transmitter comprises:

at least an antenna set having a base plate, a first antenna formed on the base plate for transmitting the wireless charging energy at a frequency less than 1 MHz, and a second antenna formed on the base plate for transmitting the wireless charging energy at a frequency more than 1 MHz;

a sensor which senses at least a sense value selected from currents, impedances, capacities, voltages and frequencies of the first antenna and the second antenna;

a MCU which selects a charging mode using the sense value sensed from the sensor; and

a switch which selects the first antenna or the second antenna according to the charging mode,

and wherein the wireless charging receiver receives wireless charging energy at a frequency more than 1 MHz.

6. The wireless charging system of claim 5,

wherein a spiral shape antenna having one end terminal at a center and the other end terminal at outermost end is provided on the base plate and the first antenna has two lead wires connected to one end terminal and the other end terminal, and the second antenna has at least a lead wire connected to the selected mid-point between one end terminal and the other end of the spiral shape antenna.

7. The wireless charging system of claim 6, wherein at least two antenna sets are provided and a part of an area occupied by each antenna set overlap each other.

8. The wireless charging system of claim 6, wherein the first antenna is a WPC antenna.

9. The wireless charging system of claim 6, wherein the wireless charging receiver further comprises an NFC antenna.

10. The wireless charging system of claim 5, wherein at least two antenna sets are provided and a part of an area occupied by each antenna set overlap each other.

11. The wireless charging system of claim 5, wherein the first antenna is a WPC antenna.

12. The wireless charging system of claim 5, wherein the wireless charging receiver further comprises an NFC antenna.

13. A wireless charging system having a wireless charging transmitter and a wireless charging receiver,

wherein the wireless charging transmitter comprises:

at least an antenna set having a base plate, a first antenna formed on the base plate for transmitting the wireless charging energy at a frequency less than 1 MHz, and a second antenna formed on the base plate for transmitting the wireless charging energy at a frequency more than 1 MHz;

a sensor sensing at least a sense value selected from currents, impedances, capacities, voltages and frequencies of the first antenna and the second antenna;

a MCU which selects a charging mode using the sense value sensed from the sensor; and

a switch which selects the first antenna or the second antenna according to the charging mode,

and wherein the wireless charging receives wireless charging energy at a selected frequency between a frequency more than 1 MHz and a frequency less than 1 MHz.

14. The wireless charging system of claim 13,

wherein a spiral shape antenna having one end terminal at a center and the other end terminal at an outermost end is provided on the base plate and the first antenna has two lead wires connected to one end terminal and the other end terminal, and the second antenna has at least a lead wire connected to the selected mid-point between one end terminal and the other end of the spiral shape antenna.

15. The wireless charging system of claim 13, wherein at least two antenna sets are provided and a part of an area occupied by each antenna set overlap each other.

16. The wireless charging system of claim 13, wherein the first antenna is a WPC antenna.

17. The wireless charging system of claim 13, wherein the wireless charging receiver further comprises an NFC antenna.

18. The wireless charging system of claim 14, wherein at least two antenna sets are provided and a part of an area occupied by each antenna set overlap each other.

19. The wireless charging system of claim 14, wherein the first antenna is a WPC antenna.

20. The wireless charging system of claim 14, wherein the wireless charging receiver further comprises an NFC antenna.