# US 11,114,897 B2 · Wireless power transmission system enabling bidirectional energy flow > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,897 B2 - Document ID: US11114897B2 - Status: Granted - Kind: B2 - Application number: 16/724,714 - Filed: 2019-12-23 - Published: 2020-09-03 - Granted: 2021-09-07 - Earliest claimed: 2008-09-27 - Assignees: WiTricity Corporation - Applicants: WiTricity Corporation - Inventors: Andre B. Kurs; Andrew J. Campanella; Aristeidis Karalis; Katherine L. Hall; Morris P. Kesler - Web page: https://patentgrep.com/patent/US11114897B2 ## CPC - G06F 1/16: Constructional details or arrangements - B60L 53/12: Inductive energy transfer - B60L 53/122: Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil - B60L 53/124: Detection or removal of foreign bodies - B60L 53/126: Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver - B60L 53/38: specially adapted for charging by inductive energy transfer - H01F 38/14: Inductive couplings - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 50/12: of the resonant type - H02J 50/60: responsive to the presence of foreign objects, e.g. detection of living beings - H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - H02J 50/80: involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices - H02J 50/90: involving detection or optimisation of position, e.g. alignment - H04B 5/79: for data transfer in combination with power transfer - H04L 9/3278: {using physically unclonable functions [PUF]} - H04N 5/64: Constructional details of receivers, e.g. cabinets or dust covers (furniture aspects {of television cabinets} A47B81/06) - H01F 2003/005: {Magnetic cores for receiving several windings with perpendicular axes, e.g. for antennae or inductive power transfer} - H04N 21/42222: {Additional components integrated in the remote control device, e.g. timer, speaker, sensors for detecting position, direction or movement of the remote control, microphone or battery charging device} - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y02T 90/12: Electric charging stations - Y02T 90/14: Plug-in electric vehicles - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A wireless power system for powering a television includes a source resonator, configured to generate an oscillating magnetic field, and at least one television component attached to at least one device resonator, wherein the at least one device resonator is configured to wirelessly receive power from the source resonator via the oscillating magnetic field when the distance between the source resonator and the at least one device resonator is more than 5 cm, and wherein at least one television component draws at least 10 Watts of power. ## Claims ### Claim 1 A wireless power transmission system enabling bidirectional energy flow, the system comprising: a device resonator mounted to a vehicle, the device resonator capable of (i) receiving first power wirelessly from a first source resonator of a first source via a first electromagnetic field generated by the first source resonator to provide the first power to an energy storage device of the vehicle and (ii) transferring second power wirelessly to a second source resonator via a second electromagnetic field generated by the device resonator to provide the second power to a second source; and power and control circuitry coupled to the device resonator to control a direction of flow of the first power or the second power, including a first direction of flow via the first electromagnetic field during a first time period and a second direction of flow via the second electromagnetic field during a second time period, the power and control circuitry comprising a processor configured to monitor a state of the power and control circuitry corresponding to the direction of flow. ### Claim 2 (depends on 1) The system of claim 1 further comprising a user interface coupled to the power and control circuitry and configured to report information based on the monitored state of the power and control circuitry. ### Claim 3 (depends on 2) The system of claim 2 wherein the information reported comprises position information of the device resonator relative to the first source resonator or the second source resonator. ### Claim 4 (depends on 2) The system of claim 2 wherein the information reported is designed to help a human operator properly position the vehicle for wireless power transmission. ### Claim 5 (depends on 2) The system of claim 2 wherein the information reported is an audio or visual indication that the vehicle is positioned for wireless power transmission. ### Claim 6 (depends on 1) The system of claim 1 wherein the power and control circuitry comprises measurement circuitry to measure a magnitude and/or phase of voltage signals associated with the device resonator. ### Claim 7 (depends on 1) The system of claim 1 wherein the power and control circuitry comprises measurement circuitry to measure a magnitude and/or phase of current signals associated with the device resonator. ### Claim 8 (depends on 1) The system of claim 1 further comprising wireless communication circuitry to exchange control signals received from the power and control circuitry to control the direction of flow between the first source or the second source and the vehicle. ### Claim 9 (depends on 1) The system of claim 1 further comprising wireless communication circuitry configured to provide authentication capability to confirm that the first source resonator or the second source resonator and the device resonator are compatible with one another for bidirectional energy flow. ### Claim 10 (depends on 1) The system of claim 1 wherein the first electromagnetic field provides a power of at least 3 kW. ### Claim 11 (depends on 1) The system of claim 1 wherein the second electromagnetic field provides a power of at least 3 kW. ### Claim 12 (depends on 1) The system of claim 1 wherein the device resonator is a capacitively-loaded inductor loop resonator. ### Claim 13 (depends on 12) The system of claim 12 wherein the device resonator has an intrinsic quality factor Q greater than 100. ### Claim 14 (depends on 1) The system of claim 1 wherein the first time period is at night when the electric grid is underutilized and the second time period is during episodes of peak demand occurring during the day. ### Claim 15 (depends on 1) The system of claim 1 wherein the vehicle is an autonomous vehicle. ### Claim 16 (depends on 1) The system of claim 1 wherein the vehicle is a drone. ### Claim 17 (depends on 1) The system of claim 1 wherein the second source is connected to a power grid. ### Claim 18 (depends on 1) The system of claim 1 wherein the second source includes an energy storage unit. ### Claim 19 (depends on 1) The system of claim 1 wherein the first source resonator and the second source resonator are the same resonator. ### Claim 20 (depends on 1) The system of claim 1 wherein the vehicle is located at first location while receiving the first power wirelessly and the vehicle is located at second location while transferring the second power wirelessly.