Selecting a configuration of coils in response to a multi-coil wireless charging system initiating charging

Patent metadata

Field	Value
Publication number	US-9537337-B2
Application number	US-201414339025-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Jul 23, 2014
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A system and method for selecting a configuration of coils in response to a multi-coil wireless charging system initiating charging are provided. The system includes a ping generator to measure a reference coil peak voltage for each of the coils of the multi-coil wireless charging system; an object detector to detect that an object is placed on a surface associated with the wireless charging system; a charge detector to detect that the object is chargeable; and in response to the object being chargeable, a switch transmitter determines which of the coils of the multi-coil wireless charging system to connect to a power source.

First claim

We claim:

1. A system for selecting a configuration of coils in response to a multi-coil wireless charging system initiating charging, comprising:
a data store comprising a computer readable medium storing a program of instructions for the selecting of the configuration;
a processor that executes the program of instructions;
a ping generator to measure a reference coil peak voltage and a coil peak voltage for each of the coils of the multi-coil wireless charging system;
an object detector to detect that an object is placed on a surface associated with the wireless charging system, by cycling via the ping generator, to measure each coil of the multi-coil wireless charging system individually and storing an individual reading of the coil peak voltage for each coil, and correlating a position of the object based on the individual reading of the coil peak voltage,
a charge detector to detect that the object is chargeable by comparing the stored coil peak voltage and the reference coil peak voltage, and
in response to the object being chargeable, a switch transmitter determines which of the coils of the multi-coil wireless charging system to connect to a power source, the determination being based on a determined position based on the individual reading of the coil peak voltage for each coil.

2. The system according to claim 1 , wherein the object detector detects that an object is placed on the surface by detecting a change in coil peak voltage from the reference coil peak voltage for each of the coils.

3. The system according to claim 2 , wherein the charge detector determines that the object is chargeable by detecting a decrease in coil peak voltage from the reference coil peak voltage and a coil peak voltage measured when the object is placed on the surface.

4. The system according to claim 2 , wherein the charge detector determines that the object is chargeable by detecting a decrease in the coil peak voltage.

5. The system according to claim 4 , wherein the decrease is over a predetermined threshold.

6. The system according to claim 1 , wherein the ping generator scans each of the coils and individually measures each of the coils when a respective coil is being scanned.

7. The system according to claim 1 , wherein the selecting is periodically performed, with the switch transmitter being configured to update which of the multi-coils are powered based on the selecting being periodically performed.

Assignees

• Madau Dinu Petre
• Zack Gary Edward
• Visteon Global Tech Inc

Inventors

• Madau Dinu Petre
• Zack Gary Edward

Classifications

• H02J7/70

  characterised by the mechanical construction · CPC title

• H02J7/0042

  Electricity · mapped topic

• H02J7/0052 Primary

  Electricity · mapped topic

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J7/025

  Electricity · mapped topic