System and Method of Power Estimation for Wireless Power Transfers
AssigneeZebra Technologies Corporation
InventorsStalin Kumaravel, christopher P. Klicpera
Life of this patent
Estimating the term…
Abstract
A wireless power transmitter performs power monitoring based on detection of power transfer initiation and termination request messages inherent to a wireless power transfer protocol. By linking the power monitoring to the messages in the wireless power transfer protocol, the wireless power transmitter is capable of monitoring power without requiring the introduction of additional, special purpose hardware or circuitry, thereby reducing the cost, size, and complexity of a wireless power transmitter and/or receiver implementing these techniques.
Claims20
A wireless power transmitter comprising:
- one or more processors;
- and
- one or more non-transitory memories storing instructions that, when executed by the one or more processors, cause the wireless power transmitter to:
- obtain a first message comprising a device identification or a power transfer initiation request from a wireless power receiver via a wireless electrical coupling, the first message being transmitted by the wireless power receiver according to a wireless power transfer protocol;
- responsive to obtaining the first message, initiate a monitoring of power usage of the wireless power transmitter over a charging session corresponding to power transfer to a battery of the wireless power receiver over the wireless electrical coupling between the wireless power transmitter and the wireless power receiver;
- obtain a second message comprising a power transfer termination request from the wireless power receiver via the wireless electrical coupling, the second message being transmitted by the wireless power receiver according to the wireless power transfer protocol;
- responsive to obtaining the second message, terminate the monitoring of the power usage;
- and
- based on the monitoring, determine an amount of power used by the wireless power transmitter over the charging session between the obtaining of the first message and the obtaining of the second message.
A computer-implemented method performed via one or more processors of a wireless power transmitter, the method comprising:
- obtaining a first message comprising a device identification or a power transfer initiation request from a wireless power receiver via a wireless electrical coupling, the first message being transmitted by the wireless power receiver according to a wireless power transfer protocol;
- responsive to obtaining the first message, initiating a monitoring of power usage of the wireless power transmitter over a charging session corresponding to power transfer to a battery of the wireless power receiver over the wireless electrical coupling between the wireless power transmitter and the wireless power receiver;
- obtaining a second message comprising a power transfer termination request from the wireless power receiver via the wireless electrical coupling, the second message being transmitted by the wireless power receiver according to the wireless power transfer protocol;
- responsive to obtaining the second message, terminating the monitoring of the power usage;
- and
- based on the monitoring, determining an amount of power used by the wireless power transmitter over the charging session between the obtaining of the first message and the obtaining of the second message.
One or more non-transitory computer readable media storing instructions that, when executed via one or more processors of a wireless power transmitter, cause a wireless power transmitter to:
- obtain a first message comprising a device identification or a power transfer initiation request from a wireless power receiver via a wireless electrical coupling, the first message being transmitted by the wireless power receiver according to a wireless power transfer protocol;
- responsive to obtaining the first message, initiate a monitoring of power usage of the wireless power transmitter over a charging session corresponding to power transfer to a battery of the wireless power receiver over the wireless electrical coupling between the wireless power transmitter and the wireless power receiver;
- obtain a second message comprising a power transfer termination request from the wireless power receiver via the wireless electrical coupling, the second message being transmitted by the wireless power receiver according to the wireless power transfer protocol;
- responsive to obtaining the second message, terminate the monitoring of the power usage;
- and
- based on the monitoring, determine an amount of power used by the wireless power transmitter over the charging session between the obtaining of the first message and the obtaining of the second message.
Dependencies are inferred from the claim text.