WIRELESS POWER TRANSMISSION AND CHARGING SYSTEM, AND POWER CONTROL METHOD OF WIRELESS POWER TRANSMISSION AND CHARGING SYSTEM

• US 20120306433A1
• Filed: 05/29/2012
• Published: 12/06/2012
• Est. Priority Date: 05/31/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Nam Yun, Kwon, Sang Wook, Park, Yun Kwon, Park, Eun Seok, Hong, Young Tack, Kim, Ki Young, Ryu, Young Ho, Kim, Dong Zo, Choi, Jin Sung, Yoon, Chang Wook
• Granted Patent: US 9,391,461 B2
• Time in Patent Office: Days
• US Class Current: 320/106
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/36 by positioning the vehicle
• 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
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/00308 Overvoltage protection
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

A wireless power transmission and charging system, and a power control method of the wireless power transmission and charging system are provided. The power control method may include generating charging power using the power amplifier. The charging power may be used to charge a target device. The charging power may be transmitted to the target device. The voltage supplied to the power amplifier may be adjusted based on a detected change in the current input to the power amplifier, a detected change in the temperature of the source device, a detected change in the amount of the power received to the target device, or a detected change in the temperature of the target device.

Claims

1. A power control method of a wireless power transmission and charging system, the power control method comprising:

generating charging power using the power amplifier, the charging power being used to charge a target device;

transmitting the charging power to the target device;

detecting a change in a current input to the power amplifier, a change in a temperature of the source device, a change in an amount of a power received to the target device, or a change in a temperature of the target device; and

adjusting a voltage supplied to the power amplifier, based on the detected change in the current input to the power amplifier, the detected change in the temperature of the source device, the detected change in the amount of the power received to the target device, or the detected change in the temperature of the target device.

2. The power control method of claim 1, further comprising:

assigning, by a source device, a control identifier (ID) to the at least one target device, the control ID being used to identify the target device.

3. The power control method of claim 2, further comprising:

determining an amount of a reference power, based on a battery state of the target device to which the control ID is assigned, the reference power being supplied to a power amplifier.

4. The power control method of claim 3, wherein the adjusting comprises:

adjusting the voltage supplied to the power amplifier, so that the reference power is supplied to the power amplifier.

5. The power control method of claim 1, wherein the adjusting comprises:

adjusting the voltage supplied to the power amplifier using a lookup table configured to store an amount of the voltage to be adjusted based on the change in the temperature of the source device.

6. The power control method of claim 1, wherein the change in the temperature of the target device is detected based on data received from the target device.

7. The power control method of claim 1, wherein the change in the amount of the power received to the target device is detected, based on data received from the target device, a pre-measured power transmission efficiency, and an output power amount of the power amplifier.

8. The power control method of claim 3, wherein the assigning comprises:

transmitting an access standard instruction comprising an access standard required to identify a plurality of target devices;

transmitting a call parameter to the plurality of target devices, to detect temporary IDs of the plurality of target devices, the temporary IDs being created based on the access standard; and

assigning control IDs to the plurality of target devices, based on a plurality of response signals received from the plurality of target devices in response to the call parameter.

9. The power control method of claim 8, wherein the access standard instruction comprises a reference point field, a call argument field, and a movement argument field, and

wherein the reference point field indicates a reference point that is used to create a temporary ID of a target device from a unique ID of the target device, and the call argument field indicates n consecutive bits starting from the reference point, and the movement argument field indicates a number of bits corresponding to a movement of the reference point.

10. The power control method of claim 8, wherein the transmitting of the call parameter comprises transmitting the call parameter at predetermined intervals, the call parameter being generated based on a value set in the call argument field.

11. The power control method of claim 8, wherein the assigning of the control IDs comprises assigning a control ID to a target device having a temporary ID identical to the call parameter, when the target device transmits an acknowledge (ACK) signal in response to the call parameter.

12. A wireless power transmitter of a wireless power transmission and charging system, the wireless power transmitter comprising:

a power converter configured to generate power;

a source resonator configured to transmit the power to a target device; and

a control/communication unit configured to adjust a voltage supplied to a power amplifier based on a change in a current input to the power amplifier,

wherein a change in a temperature of the source device, a change in an amount of a power received to the target device, or a change in a temperature of the target device.

13. The wireless power transmitter 12, wherein the power converter is configured to generate power by converting a direct current (DC) voltage to an alternating current (AC) voltage using a resonance frequency.

14. The wireless power transmitter 12, wherein the control/communication unit is further configured to:

assign a control identifier (ID) to the target device, and

determine an amount of a reference power based on a battery state of the target device to which the control ID is assigned,

wherein the control ID is used to identify the target device, and the reference power is supplied to the power amplifier.

15. A power receiving method of a wireless power transmission and charging system, the power receiving method comprising:

receiving a charging power for the charging operation from the source device;

transmitting, to the source device, information on an amount of a received power, or information on a change in a temperature of a target device, based on a request of the source device; and

receiving the charging power from the source device, after the source device adjusts a voltage supplied to a power amplifier of the source device based on the information on the amount of the received power or the information on the change in the temperature of the target device.

16. The power receiving method of claim 15, further comprising:

receiving a wake-up power and a wake-up request message from the source device; and

transmitting, to the source device, an acknowledge (ACK) message in response to the wake-up request message.

17. The power receiving method of claim 15, further comprising:

receiving, from the source device, an assigned control identifier (ID), the control ID being used in a charging operation.

18. The power receiving method of claim 17, wherein the receiving of the assigned control ID comprises;

receiving an access standard instruction comprising an access standard required to identify a plurality of target devices;

creating a temporary ID of a target device based on a value set in a reference point field, a value set in a call argument field, and a value set in a movement argument field, the reference point field, the call argument field, and the movement argument field being included in the access standard instruction;

receiving a call parameter generated based on the value set in the call argument field;

comparing the temporary ID with the call parameter;

transmitting, to the source device, a response signal in response to the call parameter, when the temporary ID is identical to the call parameter; and

receiving the assigned control ID from the source device.

19. The power receiving method of claim 18, further comprising:

receiving an access standard instruction from the source device, when the source device determines, based on a plurality of response signals, that a plurality of target devices have identical temporary IDs, the access standard instruction being updated by changing the value set in the movement argument field; and

updating the temporary IDs of the target devices based on the received access standard instruction.