Inductively coupled wireless charger

Patent metadata

Field	Value
Publication number	US-11043832-B2
Application number	US-201916418600-A
Country	US
Kind code	B2
Filing date	May 21, 2019
Priority date	May 21, 2018
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

An inductively coupled wireless charging system produces a high magnetic flux density to induce voltages in one or more coils of an electronic device via magnetic induction. These induced voltages are used to operate or charge batteries in the one or more electronic devices. The high magnetic flux density may cause electromagnetic interference to other adjacent devices, including other adjacent wireless charging systems. Methods, systems, and devices of the present disclosure are directed to reducing interference among adjacent wireless charging systems during concurrent operation of the adjacent wireless charging systems.

First claim

What is claimed is:

1. A wireless charging system for avoiding shutdown in adjacent active wireless charging components comprising:
a first wireless charging component, the first wireless charging component electromagnetically coupled to a first electronic device;
a second wireless charging component, the second wireless charging component being positioned adjacent to the first wireless charging component and electromagnetically coupled to a second electronic device; and
the first wireless charging component detects an increase in a first voltage of the first wireless charging component above a predetermined voltage threshold;
wherein, in response to detecting the increase in the first voltage above the predetermined voltage threshold, the first wireless charging component adjusts a first Control Error Packet (CEP) timeout period of the first wireless charging component.

2. The system according to claim 1 , wherein the increase in the first voltage of the first wireless charging component occurs when the first electronic device is decoupled from the first wireless charging component.

3. The system according to claim 1 , wherein the first CEP timeout period of the first wireless charging component is reduced below a default CEP timeout period.

4. The system according to claim 2 , further comprising:
the second wireless charging component detecting a second voltage of the second wireless charging component is below the predetermined voltage threshold.

5. The system according to claim 4 , wherein a second CEP timeout period of the second wireless charging component is increased above a default CEP timeout period.

6. The system according to claim 4 , wherein the second wireless charging component detects a primary coil current of the second wireless charging component is below a predetermined current threshold.

7. The system according to claim 1 , wherein the first wireless charging component detects a primary coil current of the first wireless charging component exceeding a predetermined current threshold.

8. The system according to claim 1 , wherein the first voltage comprises a primary coil voltage gain.

9. The system according to claim 5 , further comprising:
the second wireless charging component detects an absence of receipt from the second electronic device of a non-corrupt control error packet during a default CEP timeout period and detects the receipt of the non-corrupt control error packet prior to an end of the second CEP timeout period, and wherein a second voltage of the second wireless charging component remains below the predetermined voltage threshold.

10. A method for avoiding shutdown in adjacent active wireless charging components comprising:
detecting, by a first wireless charging component, an increase in a first voltage of the first wireless charging component above a predetermined voltage threshold; and
in response to detecting the increase in the first voltage above the predetermined voltage threshold, adjusting, by the first wireless charging component, a first Control Error Packet (CEP) timeout period of the first wireless charging component.

11. The method according to claim 10 , wherein the increase in the first voltage of the first wireless charging component occurs when a first electronic device is decoupled from the first wireless charging component.

12. The method according to claim 10 , wherein the first CEP timeout period of the first wireless charging component is reduced below a default CEP timeout period.

13. The method according to claim 11 , further comprising:
detecting an increase of a second voltage of a second wireless charging component adjacent to the first wireless charging component and a second electronic device coupled to the second wireless charging component, wherein the increase in the second voltage occurs when the first electronic device is decoupled from the first wireless charging component, and wherein the second voltage is below the predetermined voltage threshold.

14. The method according to claim 13 , wherein a second CEP timeout period of the second wireless charging component is increased above a default CEP timeout period.

15. The method according to claim 13 , wherein detecting a primary coil current of the second wireless charging component is below a predetermined current threshold.

16. The method according to claim 14 , further comprising:
detecting receipt from the second electronic device of a non-corrupt control error packet prior to an end of the second CEP timeout period.

Assignees

• Flex Ltd

Inventors

• Melgarejo Manolo Mariano M
• Lin Zheng-An
• Sun Sunny

Classifications

• H02J7/42

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

• H02J50/40

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

• H01F38/14 Primary

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H02J50/70

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title