Actively modifying output voltage of a wirelessly chargeable energy storage apparatus
AssigneeOssia Inc.
InventorsHatem Ibrahim Zeine, Benjamin Todd Renneberg
Life of this patent
Estimating the term…
Abstract
Embodiments of the present disclosure describe systems, methods, and apparatuses that actively regulate output voltage of wirelessly chargeable energy storage devices, e.g., wirelessly chargeable batteries. More specifically, techniques are described to emulate low-battery behavior of a standard battery, e.g., a typical AA battery, based on an internal state of the apparatus. The internal state can be determined based on commands provided by or to the apparatus or based on analog information such as, for example, an internal charge state, e.g., of a lithium-ion battery or capacitor.
Claims21
A wirelessly chargeable energy storage apparatus comprising:
- one or more antennas for receiving wireless radio frequency (RF) power from a wireless power delivery system;
- power reception circuitry for converting the received wireless RF power to direct current (DC) power;
- one or more energy storage devices configured to store the converted DC power;
- and
- voltage regulator circuitry configured to actively modify an output voltage (VOUT) of the wirelessly chargeable energy storage apparatus based on an internal state of the apparatus, the voltage regulator circuitry including:
- control circuitry coupled to the one or more energy storage devices for receiving a voltage of the one or more energy storage devices, and configured to:
- determine the internal state;
- and
- transmit an adjustment control signal including an adjustment voltage (VADJ) based on the internal state;
- an output voltage regulator coupled to the control circuitry for receiving a feedback voltage (VFB);
- and
- a resistor network for modifying the adjustment voltage (VADJ) coupled to and between the control circuitry and the output voltage regulator,
- wherein the output voltage regulator is configured to provide the output voltage (VOUT) based on the feedback voltage (VFB), and
- wherein the feedback voltage (VFB) is based on the adjustment voltage (VADJ) as modified by the resistor network.
A method for actively regulating output voltage (VOUT) of a wirelessly chargeable energy storage apparatus, the method comprising:
- receiving, by the wirelessly chargeable energy storage apparatus, directed wireless radio frequency (RF) power from a wireless power delivery system;
- converting the received wireless RF power to direct current (DC) power;
- storing the converted DC power in one or more energy storage devices;
- receiving, by control circuitry of the wirelessly chargeable energy storage apparatus, a voltage of the one or more energy storage devices;
- determining, by the control circuitry, an internal state of the wirelessly chargeable energy storage apparatus;
- transmitting, by the control circuitry, an adjustment control signal including an adjustment voltage (VADJ) based on the internal state;
- receiving, by an output voltage regulator of the wirelessly chargeable energy storage apparatus coupled to the control circuitry, a feedback voltage (VFB);
- modifying, by a resistor network coupled to and between the control circuitry and the output voltage regulator, the adjustment voltage (VADJ);
- and
- providing, by the output voltage regulator, the output voltage (VOUT) of the wirelessly chargeable energy storage apparatus based on the feedback voltage (VFB),
- wherein the feedback voltage (VFB) is based on the adjustment voltage (VADJ) as modified by the resistor network.
A voltage regulator circuit comprising:
- control circuitry operable to:
- receive a voltage of one or more energy storage devices of a wirelessly chargeable energy storage apparatus;
- determine an internal state of the wirelessly chargeable energy storage apparatus;
- and
- responsively induce an adjustment voltage (VADJ) based on the internal state;
- an output voltage regulator coupled to the control circuitry, and operable to:
- induce a power supply feedback voltage (VFB);
- and
- induce an output voltage (VOUT) of the wirelessly chargeable energy storage apparatus based on the adjustment voltage (VADJ);
- and
- a resistor network coupled to and between the control circuitry and the output voltage regulator, and operable to adjust the output voltage (VOUT) based on the power supply feedback voltage (VFB) and the adjustment voltage (VADJ).
Dependencies are inferred from the claim text.