WIRELESS POWER TRANSMISSION SYSTEM AND METHOD OF CONTROLLING THE SAME

• US 20130050889A1
• Filed: 08/07/2012
• Published: 02/28/2013
• Est. Priority Date: 08/29/2011
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Hwang, Sang Hoon, Park, Tah Joon, Han, Kyung Joon
• Granted Patent: US 9,178,389 B2
• Time in Patent Office: Days
• US Class Current: 361/86
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

Disclosed herein is a wireless power transmission system, including: a transmission unit generating and transmitting power for charging a battery; a reception unit receiving the transmitted power and charging the battery with power; and a transmission control unit detecting a charging status of the battery by using the transmitted power, and, if the charging status of the battery is in a damage section due to reflective power, controlling the transmission unit to transmit power lower than power of a normal operation, whereby damage of transmission and reception devices due to a reflective wave can be minimized.

Claims

1. A wireless power transmission system, comprising:

a transmission unit generating and transmitting power for charging a battery;

a reception unit receiving the transmitted power and charging the battery with power; and

a transmission control unit detecting a charging status of the battery by using the transmitted power, and, if the charging status of the battery is in a damage section due to reflective power, controlling the transmission unit to transmit power lower than power of a normal operation.

2. The wireless power transmission system according to claim 1, wherein the transmission control unit detects a charging voltage of the battery by using the transmitted power, and, if the charging voltage of the battery corresponds to a voltage range of the damage section due to the reflective power, controls the transmission unit to transmit power lower than the power of the normal operation.

3. The wireless power transmission system according to claim 1, further comprising:

a first detection unit detecting current by using the transmitted power;

a second detection unit detecting a voltage status of the battery;

a reception control unit combining the current detected by the first detection unit and the voltage status of the battery detected by the second detection unit and generating code information; and

a reception communication unit transmitting the code information generated by the reception control unit to the transmission control unit.

4. The wireless power transmission system according to claim 3, wherein the transmission control unit determines a range of the transmitted code information, and, if the range of the transmitted code information corresponds to the voltage range of the damage section due to the reflective power, controls the transmission unit to transmit power lower than the power of the normal operation.

5. The wireless power transmission system according to claim 1, wherein the damage section due to the reflective power is a section in which a constant current (CC) mode in which the battery is charged with constant current is converted into a constant voltage (CV) mode in which the battery is charged with constant voltage.

6. The wireless power transmission system according to claim 1, wherein the damage section due to the reflective power is a section in which the voltage charged in the battery is completely discharged.

7. The wireless power transmission system according to claim 1, wherein the damage section due to the reflective power is an initial charging section of the battery.

8. The wireless power transmission system according to claim 2, wherein the transmission unit includes:

a power generator generating and transmitting the power for charging the battery; and

a transmitter transmitting the transmitted power to the reception unit.

9. The wireless power transmission system according to claim 1, wherein the transmission control unit controls the transmission unit to transmit the power of the normal operation if the charging status of the battery is not in the damage section due to the reflective power.

10. A method of controlling a wireless power transmission system, the method comprising:

generating and transmitting power for charging a battery;

receiving the transmitted power and charging the battery with power;

detecting a charging status of the battery by using the transmitted power;

if the charging status of the battery is in a damage section due to reflective power, controlling power lower than power of a normal operation to be transmitted.

11. The method according to claim 10, wherein the detecting and the controlling are repeatedly performed until the battery is completely charged.

12. The method according to claim 10, wherein the detecting includes detecting a charging voltage of the battery by using the transmitted power,

wherein the controlling includes, if the charging voltage of the battery is in the damage section due the reflective power, controlling power lower than the power of the normal operation to be transmitted.

13. The method according to claim 10, wherein the detecting includes:

detecting current by using the transmitted power;

detecting a voltage status of the battery;

combining the detected current and the detected voltage status of the battery, generating code information, and detecting the charging status of the battery.

14. The method according to claim 10, wherein the damage section due to the reflective power is a section in which a CC mode in which the battery is charged with constant current is converted into a CV mode in which the battery is charged with constant voltage.

15. The method according to claim 10, wherein the damage section due to the reflective power is a section in which the voltage charged in the battery is completely discharged.

16. The method according to claim 10, wherein the damage section due to the reflective power is an initial charging section of the battery.

17. The method according to claim 10, wherein the controlling includes controlling the power of the normal operation to be transmitted if the charging status of the battery is not in the damage section due to the reflective power.