Method for transmitting wireless power in wireless charging system including a wireless power transmitting unit and wireless power receiving unit

• US 10,170,926 B2
• Filed: 07/27/2016
• Issued: 01/01/2019
• Est. Priority Date: 07/27/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Kyung-Woo, Jung, Hee-Won
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): Omar, Ahmed
• Application Number:
  US15/221,148
• Publication Number:
  US 20170033590A1
• Time in Patent Office: 888 Days
• Field of Search: 320108
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/007192 in response to temperature
• CPC Class Codes: H02J 7/007194 of the battery
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A method for transmitting wireless power in a wireless charging system is provided and includes receiving at least one of information on an available maximum temperature and maximum voltage value information of a back end of a rectification unit from at least one wireless power receiving unit (PRU) from among a plurality of PRUs, receiving at least one of information on a current temperature and current voltage value information of the back end of the rectification unit from each of the plurality of PRUs, and determining a dominant PRU among the plurality of PRUs based on the at least one of information.

Claims

1. A method for transmitting wireless power in a wireless charging system, the method comprising:

receiving information related to a temperature from each of a plurality of power receiving units (PRUs);

identifying a temperature ratio of each of the plurality of PRUs based on the received information, wherein the temperature ratio is a current temperature relative to an available maximum temperature;

determining a PRU from among the plurality of PRUs based on the identified temperature ratio; and

adjusting transmission power according to a voltage setting value of the determined PRU.

2. The method of claim 1, wherein the determined PRU is regarded as a dominant PRU.

3. The method of claim 1, wherein the determined PRU is a PRU having the highest temperature ratio from among the plurality of the PRUs.

4. The method of claim 1, wherein the information related to the temperature is transmitted through a PRU dynamic signal that is transmitted by the PRU in a low power mode.

5. The method of claim 1, wherein the information related to the temperature is transmitted through a PRU dynamic signal that is transmitted by the PRU in a power transmission mode.

6. A wireless power transmitting unit (PTU), comprising:

a communication unit configured to receive information related to a temperature from each of a plurality of power receiving units (PRUs);

a processor configured to identify a temperature ratio of each of the plurality of PRUs based on the received information, and determine a PRU from among the plurality of PRUs based on the identified temperature ratio, wherein the temperature ratio is a current temperature relative to an available maximum temperature; and

a power transmitter configured to transmit power to the plurality of PRUs based on a voltage setting value of the determined PRU.

7. The PTU of claim 6, wherein the processor adjusts transmission power of the power transmitter according to the voltage setting value of the determined PRU.

8. The PTU of claim 6, wherein the information related to the temperature is transmitted through PRU dynamic signal that is transmitted by the PRU in a low power mode.

9. The PTU of claim 6, wherein the information related to the temperature is transmitted through a PRU dynamic signal which is transmitted by the PRU in a power transmission mode.

10. The PTU of claim 6, wherein the determined PRU is regarded as a dominant PRU.

11. The PTU of claim 6, wherein the determined PRU is a PRU having the highest temperature ratio from among the plurality of the PRUs.