Charging volatage configuring method for wireless charging and wireless power reception unit

• US 10,218,206 B2
• Filed: 07/18/2014
• Issued: 02/26/2019
• Est. Priority Date: 07/19/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Kyung-Woo, Byun, Kang-Ho, Jung, Hee-Won
• Primary Examiner(s): Fleming, Fritz M
• Application Number:
  US14/906,200
• Publication Number:
  US 20160181856A1
• Time in Patent Office: 1,684 Days
• CPC Class Codes: H02J 50/10 using inductive coupling
• 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 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge

Abstract

The present disclosure relates to a charging voltage configuring method for wireless charging to control a charging voltage of a wireless power reception unit in a wireless charging network. A charging voltage configuration method for wireless charging by a wireless Power Reception Unit (PRU) which receives wireless charging power from a wireless Power Transmission Unit (PTU) according to the present disclosure may include: measuring charging power received from the wireless power reception unit; when the measured charging power is smaller than a minimum power level for charging initiation or a difference between the measured charging power and the minimum power level is within a predetermined range, determining a voltage configuration value upwardly adjusted by a pre-configured level in comparison with a pre-configured voltage configuration value; and transmitting the determined voltage configuration value to the wireless power transmission unit.

Claims

1. A method for controlling a wireless power reception unit (PRU) which receives wireless charging power from a wireless power transmission unit (PTU), the method comprising:

transmitting a first message including a first voltage configuration value to the wireless PTU;

receiving, from the wireless PTU, a charging power which is determined based on the first voltage configuration value by the wireless PTU;

measuring the charging power received from the wireless PTU;

when the measured charging power is smaller than a minimum power level for charging initiation or a difference between the measured charging power and the minimum power level is within a predetermined range, identifying a second voltage configuration value by adjusting the first voltage configuration value;

transmitting a second message including the second voltage configuration value to the wireless PTU; and

receiving the charging power of which a size is adjusted based on the second voltage configuration value.

2. The method of claim 1, wherein the second message corresponds to PRU dynamic signal.

3. The method of claim 1, wherein the first voltage configuration value corresponds to at least one of a minimum voltage value VRECT_MIN of a rear end of a rectifier of the wireless PRU, an optimum voltage value VRECT_SET of the rear end of the rectifier of the wireless PRU, and a maximum voltage value VRECT_HIGH of the rear end of the rectifier of the wireless PRU.

4. The method of claim 1, wherein the measuring of the charging power comprises measuring the charging power at a rear end of a rectifier of the wireless PRU.

5. A method for controlling a wireless power reception unit (PRU) which receives wireless charging power from a wireless power transmission unit (PTU), the method comprising:

transmitting a first message including a first voltage configuration value to the wireless PTU and receiving a charging power corresponding to the first voltage configuration value from the wireless PTU;

determining whether a charging voltage corresponding to the charging power deviates from a pre-configured valid voltage range;

in response to determining that the charging voltage has deviated from the pre-configured valid voltage range, identifying a second voltage configuration value by adjusting the first voltage configuration value;

transmitting a second message including the second voltage configuration value to the wireless PTU; and

receiving the charging power of which a size is adjusted based on the second voltage configuration value.

6. The method of claim 5, wherein the second message corresponds to a PRU dynamic signal.

7. A method for controlling a wireless power transmission unit (PTU) which allows a wireless power reception unit (PRU) to be charged, the method comprising:

receiving a first message including a first voltage configuration value from the wireless PRU;

transmitting a charging power for charging of the wireless PRU in reference to the received first voltage configuration value;

receiving a second message including a second voltage configuration value which is identified by adjusting the first voltage configuration value upwardly by a pre-configured level at the wireless PRU from the wireless PRU; and

transmitting the charging power of which a size is adjusted based on the second voltage configuration value.

8. The method of claim 7, wherein the second voltage configuration value is received through a PRU dynamic signal transmitted from the wireless PRU.

9. A wireless power reception unit (PRU) for receiving wireless charging power from a wireless power transmission unit (PTU), the wireless PRU comprising:

a controller configured to;

transmit a first message including a first voltage configuration value to the wireless PTU,

control the PRU to receive a charging power corresponding to the first voltage configuration value from the wireless PTU,

measure the received charging power,

when the measured charging power is smaller than a minimum power for charging initiation or a difference between the measured charging power and the minimum power level is within a pre-configured range, identify a second voltage configuration value by adjusting the first voltage configuration value,

transmit a second message including the second voltage configuration value to the wireless PTU, and

control the PRU to receive the charging power of which a size is adjusted based on the second voltage configuration value.

10. The wireless PRU of claim 9, wherein the second message corresponds to a PRU dynamic signal.

11. The wireless PRU of claim 9, wherein the first voltage configuration value corresponds to at least one of a minimum voltage value VRECT_MIN of a rear end of a rectifier of the wireless power reception unit, an optimum voltage value VRECT_SET of the rear end of the rectifier of the wireless power reception unit, and a maximum voltage value VRECT_HIGH of the rear end of the rectifier of the wireless power reception unit.

12. The wireless PRU of claim 9, wherein the charging power is measured at a rear end of the rectifier of the wireless power reception unit.

13. A wireless power reception unit (PRU) for receiving wireless charging power from a wireless power transmission unit (PTU), the wireless Power Reception Unit comprising:

a controller configured to;

transmit a first message including a first voltage configuration value to the wireless PTU,

control the PRU to receive a charging power corresponding to the first voltage configuration value from the wireless PTU,

determine whether a charging voltage corresponding to the charging power deviates from a pre-configured valid voltage range,

in response to determining that the charging voltage has deviated from the pre-configured valid voltage range, identify a second voltage configuration value by adjusting the first voltage configuration value,

transmit a second message including the second voltage configuration value to the wireless PTU, and

control the PRU to receive the charging power of which a size is adjusted based on the second voltage configuration value.

14. A wireless power transmission unit (PTU) for receiving wireless charging power from a wireless power reception unit (PRU), the wireless PTU comprising:

a communication unit that receives a first message including a first voltage configuration value from the wireless PRU; and

a power transmission unit that transmits a charging power for charging of the wireless PRU in reference to the received first voltage configuration value,

wherein the communication unit receives a second message including a second voltage configuration value which is identified by adjusting the first voltage configuration value upwardly by a pre-configured level at the wireless PRU from the wireless PRU, and

the power transmission unit transmits the charging power of which a size is adjusted based on the second voltage configuration value.

15. The wireless PTU of claim 14, wherein the second message corresponds to a PRU dynamic signal.