Contactless power reception device and reception method

Patent metadata

Field	Value
Publication number	US-11038377-B2
Application number	US-202016803475-A
Country	US
Kind code	B2
Filing date	Feb 27, 2020
Priority date	May 26, 2014
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A wireless power reception device and a wireless communication method thereby are provided. The wireless communication method by the wireless power reception device may comprise the steps of: receiving a wireless power signal from a wireless power transmission device; measuring the strength of the wireless power signal; modulating the amplitude of the wireless power signal according to the measured strength of the wireless power signal; and performing communication with the wireless power transmission device by using the signal having the amplitude modulated.

First claim

The invention claimed is:

1. A method by a wireless power reception device, the method comprising:
receiving a wireless power signal from a wireless power transmission device via a secondary coil of the wireless power reception device; and
communicating with the wireless power transmission device using a modulator positioned between the secondary coil and a rectifier of the wireless power reception device, wherein the modulator includes a first resistor and a first transistor connected in series on a first terminal of the secondary coil and the modulator includes a second resistor and a second transistor connected in series on a second terminal of the secondary coil.

2. The method of claim 1 , wherein the at least one transistor is any one of a metal oxide silicon field effect transistor (MOSFET) and a bipolar junction transistor (BJT).

3. The method of claim 1 , wherein the modulator is coupled to an alternating current (AC) terminal of the wireless power reception device.

4. The method of claim 1 , wherein the modulator does not include a capacitor, and wherein the at least one resistor in used in place of the capacitor that would otherwise be included in a traditional modulator design.

5. A wireless power reception device comprising:
at least one secondary coil to receive a wireless power signal from a wireless power transmission device;
a rectifier configured to rectify the received wireless power signal;
a modulator positioned between the secondary coil and the rectifier, wherein the modulator includes a first resistor and a first transistor connected in series on a first terminal of the secondary coil and the modulator includes a second resistor and a second transistor connected in series on a second terminal of the secondary coil; and
a controller configured to communicate with the wireless power transmission device using the modulator.

6. The wireless power reception device of claim 5 , wherein the at least one transistor is any one of a metal oxide silicon field effect transistor (MOSFET) and a bipolar junction transistor (BJT).

7. The wireless power reception device of claim 5 , wherein the modulator is coupled to an alternating current (AC) terminal of the wireless power reception device.

8. The wireless power reception device of claim 5 , wherein the modulator does not include a capacitor, and wherein the at least one resistor in used in place of the capacitor that would otherwise be included in a traditional modulator design.

Assignees

• Ge Hybrid Tech Llc

Inventors

• Jung Chun-Kil
• Kim Hak Do
• Noh Sang Youn

Classifications

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J50/80 Primary

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/402

  the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas · CPC title

• H02J50/40

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title