US20220386221A1 - Wireless Network Pairing for Wireless Electric Vehicle Charging - Google Patents

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Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W48/00—Access restriction; Network selection; Access point selection
  • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/24—Accounting or billing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
  • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
  • B60L53/12—Inductive energy transfer
  • B60L53/126—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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
  • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
  • B60L53/12—Inductive energy transfer
  • B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
  • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
  • B60L53/12—Inductive energy transfer
  • B60L53/124—Detection or removal of foreign bodies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
  • B60L53/30—Constructional details of charging stations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
  • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
  • B60L53/30—Constructional details of charging stations
  • B60L53/305—Communication interfaces
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
  • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
  • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
  • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W36/00—Hand-off or reselection arrangements
  • H04W36/0005—Control or signalling for completing the hand-off
  • H04W36/0055—Transmission or use of information for re-establishing the radio link
  • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/30—Services specially adapted for particular environments, situations or purposes
  • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
  • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
• • H04W72/048—
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/50—Allocation or scheduling criteria for wireless resources
  • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W76/00—Connection management
  • H04W76/10—Connection setup
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2200/00—Type of vehicle
  • B60Y2200/90—Vehicles comprising electric prime movers
  • B60Y2200/91—Electric vehicles
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02T90/10—Technologies relating to charging of electric vehicles
  • Y02T90/12—Electric charging stations
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02T90/10—Technologies relating to charging of electric vehicles
  • Y02T90/14—Plug-in electric vehicles

Definitions

• This application relates to wireless network pairing, and in particular, to coordinating the pairing of an electric vehicle to a wireless network provided by a given wireless charging station.
• a vehicle is paired to a selected wireless charging station of a plurality of wireless charging stations by joining the vehicle to a first wireless network provided by a central access point, assigning a channel to use for pairing the vehicle to the selected wireless charging station by a network manager, transmitting a channel identifier to the vehicle over the first wireless network, and transmitting the channel identifier to the plurality of wireless charging stations.
• the vehicle then configures a beacon device coupled to the vehicle to use the assigned channel and moves into proximity of the selected wireless charging station.
• the selected wireless charging station detects a beacon signal of the beacon device, confirms that the beacon signal is using the identified channel, and transmits information identifying a second wireless network to the vehicle.
• the vehicle can then join the second wireless network using the transmitted information.
• Implementations may include any of the following, in any combination.
• Joining the vehicle to the first wireless network may include the vehicle detecting the first wireless network and automatically joining the first wireless network.
• Joining the vehicle to the first wireless network may include the vehicle receiving a user input selecting the first wireless network and instructing the vehicle to join the first wireless network.
• Joining the vehicle to the first wireless network may include determining that the vehicle is moving below a predetermined speed, searching for available wireless networks, detecting the first wireless network, determining that the first wireless network is associated with the plurality of wireless charging stations, and joining the first wireless network.
• the second wireless network may be provided by the selected wireless charging station.
• the plurality of wireless charging stations may each be connected to the first wireless network.
• Information identifying the vehicle may be provided to the plurality of wireless charging stations, and that information may be used to confirm, at the selected wireless charging station, that the detected beacon signal is provided by the identified vehicle.
• the second wireless network may be activated after detecting the beacon signal at the selected wireless charging station and confirming that the beacon signal is using the assigned channel.
• Alignment guidance may be provided from the selected wireless charging station to the vehicle over the first wireless network after detecting the beacon signal at the selected wireless charging station and confirming that the beacon signal is using the assigned channel.
• Alignment guidance may be provided from the selected wireless charging station to the vehicle over the second wireless network after the vehicle has joined the second wireless network.
• the network manager may determine which of the plurality of wireless charging stations are available for use by the vehicle, and the channel identifier may be transmitted to only the determined wireless charging stations that are available for use by the vehicle.
• a vehicle in general, in some aspects, includes a wireless network interface, a beacon device, and a processor.
• the processor establishes communication between the vehicle and a selected one of a plurality of wireless charging stations by performing operations, including joining the vehicle's wireless network interface to a first wireless network provided by a central access point.
• the operations also include receiving, over the first wireless network, a channel identifier of an assigned channel to use for pairing the vehicle to the selected one of the plurality of wireless charging stations.
• the operations include configuring, based on the channel identifier, the beacon device to use the assigned channel.
• the operations further include receiving, over the first wireless network, information identifying a second wireless network associated with the selected one of the plurality of wireless charging stations.
• the operations also include joining the vehicle's wireless network interface, based on the received information, to the second wireless network to pair with the selected one of the plurality of wireless charging stations.
• a wireless charging station includes a wireless network interface and a processor.
• the processor establishes communication with a vehicle by performing operations, including providing a first wireless network and receiving, from a network manager, a channel identifier of an assigned channel to use for pairing with the vehicle.
• the operations include detecting a beacon signal operating at the assigned channel.
• the operations also include transmitting, to the network manager, information associated with the detecting of the beacon signal.
• the operations further include receiving a request from the vehicle to join the first wireless network and enabling the vehicle to join the first wireless network.
• the processor may provide the first wireless network only after detecting the beacon signal.
• the processor may use the wireless network interface to communicate with the network manager over a second wireless network.
• the processor may communicate with the network manager over a network interface other than the wireless network interface.
• a network manager includes a wireless access point and a processor.
• the wireless access point is configured to provide a first wireless network.
• the processor is configured to coordinate pairing a vehicle to a selected wireless charging station of a plurality of wireless charging stations that are under control of the network manager by performing operations including receiving a request from the vehicle over the first wireless network and assigning a channel to use for pairing the vehicle to the selected wireless charging station.
• the operations also include transmitting a channel identifier of the assigned channel to the vehicle over the first wireless network to enable the vehicle to configure a beacon device coupled to the vehicle to provide a beacon signal using the assigned channel.
• the operations include transmitting the channel identifier to the plurality of wireless charging stations.
• the operations further include receiving an indication from the selected wireless charging station that the selected wireless charging station has detected the beacon signal using the identified channel.
• the operation also includes transmitting, to the vehicle, information identifying a second wireless network provided by the selected wireless charging station to enable the vehicle to pair with the selected wireless charging station.
• a secondary device can be paired to a selected one of a plurality of primary devices by a method including joining the secondary device to a first wireless network provided by a central access point, determining an identification of an assigned channel to use for pairing the secondary device to the selected one of the plurality of primary devices, and transmitting the channel identification to the secondary device over the first wireless network.
• the method also includes transmitting the channel identifier to the plurality of primary devices.
• the method further includes configuring a beacon device coupled to the secondary device to use the assigned channel and moving the secondary device into proximity of the selected primary device.
• the method includes detecting, at the selected one of a plurality of primary devices, a beacon signal of the beacon device using the identified channel.
• the method also includes, based on the detecting, transmitting information identifying a second wireless network to the secondary device, and joining the secondary device to the second wireless network based on the transmitted information.
• FIG. 1 illustrates an example electric vehicle charging environment including a parking facility with multiple wireless charging stations for use by electric vehicles.
• FIG. 2 depicts a flow chart of an example method for pairing a vehicle to one of multiple wireless charging stations in relation to the electric vehicle charging environment of FIG. 1 .
• FIG. 3 illustrates another example electric vehicle charging environment including a parking facility with multiple wireless charging stations for use by electric vehicles.
• FIG. 4 depicts a flow chart of an example method for pairing a vehicle to one of multiple wireless charging stations, in relation to the electric vehicle charging environment of FIG. 3 .
• FIG. 5 illustrates an example device diagram of the central network manager, the wireless charging station, and the vehicle in more detail.
• Wireless charging of electric vehicles is described in detail in patents such as U.S. Pat. No. 8,933,594, titled “Wireless energy transfer for vehicles,” and U.S. Pat. No. 9,561,730, titled “Wireless power transmission in electric vehicles,” which are incorporated here by reference in their entirety.
• One aspect of wireless electric vehicle charging to be addressed is establishing network communications between the electric vehicle and the wireless charging station at which the electric vehicle is parked. This establishment of network communications can be particularly difficult in a facility with multiple wireless charging stations, at which multiple electric vehicles may be attempting to park at the same time.
• a vehicle may establish network communications with a wireless charging station in an adjacent parking spot, determining that it has established communication with the correct wireless charging station in its own parking spot.
• the vehicle requests power and does not receive it (because it is in communication with the wrong wireless charging station), the vehicle may not detect the source of the problem.
• the wireless charging station in the adjacent parking spot may detect a fault because it is providing power and recognizing no load.
• This problem may be referred to as “cross-connect.”
• additional features e.g., vehicle alignment guidance
• safety features e.g., foreign-object detection
• FIG. 1 illustrates an example electric vehicle charging environment 100 including a parking facility with multiple wireless charging stations for use by electric vehicles.
• multiple wireless charging stations 102 e.g., GA 1 102 - 1 , GA 2 102 - 2 , GA 3 102 - 3 , GA 4 102 - 4 , GA 5 102 - 5
• CNM central network manager
• Any suitable number of wireless charging stations 102 can be implemented.
• the CNM 104 provides, or is coupled to, a first wireless network 106 with the network Service Set Identifier (SSID) (e.g., SSID WPT_CNM).
• SSID Service Set Identifier
• a wireless access point 108 (e.g., central access point) providing the first wireless network with the network SSID WPT_CNM may be an integral component of the CNM 104 .
• the wireless access point 108 may be a stand-alone device or part of other network infrastructure in communication with the CNM 104 through other mechanisms, including a wired network or an internal data bus.
• WiFi IEEE 802.11
• FIG. 1 is used in FIG. 1 and generally herein as an example communication standard
• other network physical layers and higher-level protocols may also be used, such as Bluetooth® or IEEE 802.15.4 (low-rate wireless networks, such as ZigBee®).
• each of the wireless charging stations GA 1 102 - 1 through GA 5 102 - 5 has a wireless network interface 110 (e.g., wireless network interfaces 110 - 1 , 110 - 2 , 110 - 3 , 110 - 4 , and 110 - 5 , respectively), and is capable of functioning as a wireless access point for its own private network 112 , indicated by network SSID corresponding to the station's number: GA 1 102 - 1 broadcasts a private network 112 - 1 with the network SSID WPT_ 01 , GA 2 102 - 2 broadcasts another private network 112 - 2 with the network SSIDWPT_ 02 , and so forth.
• a wireless network interface 110 e.g., wireless network interfaces 110 - 1 , 110 - 2 , 110 - 3 , 110 - 4 , and 110 - 5 , respectively
• the charging stations 102 can communicate with the CNM 104 over a network interface other than the wireless network interface 110 .
• GA 1 102 - 1 is already charging a vehicle 114 (VA 1 114 - 1 ) and using its own wireless network (e.g., private network 112 ) to communicate with the VA 1 114 .
• the other wireless charging stations (GA 2 102 - 2 through GA 5 102 - 5 ) are using their network interfaces to communicate with the CNM 104 over the first wireless network 106 with the network SSID WPT_CNM.
• a second vehicle (VA 2 114 - 2 ) is searching for a place to park and charge and has also joined the first wireless network 106 (WPT_CNM).
• FIG. 2 depicts a flow chart of an example method 200 for pairing a vehicle to one of multiple wireless charging stations, 102 in relation to the electric vehicle charging environment 100 of FIG. 1 .
• the method 200 depicted in FIG. 2 relates to pairing the second vehicle (e.g., VA 2 114 - 2 ) to an available wireless charging station of the wireless charging stations 102 .
• the second vehicle e.g., VA 2 114 - 2
• the vehicle 114 joins the wireless network 106 associated with the CNM 104 , as illustrated in FIG. 1 .
• This step may be automatically initiated when, at step 204 , the vehicle 114 is moving below a predetermined speed (e.g., a threshold speed) associated with parking the vehicle 114 , such as 5 km/h, and the vehicle 114 , at step 206 , searches for available wireless networks and detects a network SSID with prefix “WPT_”, indicating to the vehicle 114 that the wireless network 106 is a wireless charging control network. Using the network SSID, the vehicle 114 may determine that the wireless network 106 is associated with multiple wireless charging stations 102 .
• a predetermined speed e.g., a threshold speed
• WPT_ prefix
• the vehicle 114 may determine that the wireless network 106 is associated with multiple wireless charging stations 102 .
• the vehicle 114 may, at step 208 , display detected wireless networks on a user interface and, at step 210 , receive a user input selecting one of the detected networks (e.g., the wireless network 106 ) that the user (e.g., driver) knows or suspects is associated with the wireless charging stations 102 .
• the user input may also instruct the vehicle to join the wireless network 106 .
• the CNM 104 assigns a passive beacon (PB) channel to the vehicle 114 . Then, at step 214 , the CNM 104 transmits an identifier (ID) (e.g., channel identifier) of that PB channel to the vehicle 114 and to all the available wireless charging stations 102 .
• ID e.g., channel identifier
• the channel assignment is a specified frequency. In other examples, the channel assignment may include other characteristics, such as encoding schemes or encryption keys.
• the wireless charging stations 102 are only joined to the CNM's network (e.g., the wireless network 106 ) if they are available, so step 214 is simply to broadcast the PB channel to all wireless charging stations 102 that are on the network at that time.
• the CNM 104 determines which of the multiple wireless charging stations 102 are available for use by the vehicle and transmits the channel identifier to only those wireless charging stations determined to be available.
• the CNM 104 may be aware of a state of each wireless charging station 102 (e.g., available, charging, not in service, out of order) based on, for example, having received an indication of such status from each of the wireless charging stations 102 .
• the channel assignment and transmission of the channel identifier may be in response to a request from the vehicle 114 (not shown) or may be performed automatically in response to the vehicle 114 joining the wireless network 106 .
• Passive beacons are typically used for providing alignment guidance between the vehicle 114 and the wireless charging station, as described in U.S. patent application Ser. No. 16/052,445, titled “Hybrid Foreign-Object Detection and Positioning System,” which is incorporated here in its entirety. In this case, however, the passive beacon is re-purposed for use as a pairing identifier to prevent cross-connect problems.
• the vehicle 114 Upon receipt of the PB channel identifier, the vehicle 114 , at step 216 , configures its beacon device (e.g., passive beacon) to use the PB channel corresponding to the PB channel identifier, and the vehicle 114 proceeds towards a selected parking spot.
• the selection of which parking spot to use may be determined by the driver (human or autonomous) or may be assigned by the CNM 104 .
• Each of the available wireless charging stations 102 listens for the passive beacon by energizing its foreign object detection (FOD) system or other systems used for detecting passive beacons during the parking procedure.
• FOD foreign object detection
• the CNM 104 terminates the wireless network connection to the vehicle 114 to disconnect the vehicle 114 from the CNM network, and the vehicle 114 may be forced to restart or abort the pairing method 200 .
• the beacon signal (“YES” at step 218 )
• the wireless charging station 102 detects the passive beacon on the assigned channel and, thus, confirms that the passive beacon is using the assigned channel. Responsive to detecting the beacon signal using the assigned channel, the wireless charging station 102 , at step 224 , reports the PB detection to the CNM 104 . In some cases, the wireless charging station 102 may, in response to detecting the beacon signal and confirming that the beacon signal is using the assigned channel, provide alignment guidance to the vehicle 114 over the wireless network 106 .
• the CNM 104 When the CNM 104 receives the indication from one of the wireless charging stations 102 that the passive beacon has been detected using the assigned channel, then at step 226 , the CNM 104 instructs that particular wireless charging station 102 to activate its own wireless network and also, at step 228 , transmits information identifying the wireless charging station's wireless network to the vehicle 114 , such as the SSID of the wireless charging station's wireless network. In some instances, the wireless charging station 102 may activate its own wireless network in response to detecting the beacon signal and confirming that the beacon signal is using the assigned channel.
• the selected wireless charging station 102 may not broadcast the SSID of its own network (e.g., the SSID is hidden), but rather may depend on the vehicle 114 receiving the SSID from the CNM 104 so that other devices do not attempt to join the private network 112 of the selected wireless charging station 102 .
• the private network 112 is secured using a password, such as through the WiFi Protected Access standard WPA2, WPA3, or other security measures, the password may be provided to the vehicle 114 by the CNM 104 at the same time as the SSID.
• the password may be pre-configured in the vehicle's memory, for example, if the selected wireless charging station 102 is part of a subscription service to which the vehicle's operator subscribes.
• the vehicle 114 disconnects from the CNM network and connects to the private network 112 provided by the selected wireless charging station 102 . Because the selected wireless charging station 102 has already confirmed its close proximity to the vehicle 114 , per the detection of the beacon signal at the assigned channel, and only that particular vehicle 114 was given the wireless charging station's network SSID, it is assured that the vehicle 114 connecting to the wireless charging station's private network 112 is the correct vehicle.
• the pairing method is complete, and the vehicle 114 and the selected wireless charging station 102 can now use the network connection between them (over the wireless charging station's private network 112 ) to negotiate any further configuration that is needed, including alignment guidance such as fine alignment of the vehicle 114 to a wireless charging coil of the wireless charging station 102 , authorization to charge the vehicle 114 , and parameters of the wireless charging field.
• the assigned channel can be reused for the next pairing process, e.g., for a different vehicle to pair with one of the other wireless charging stations 102 .
• vehicle alignment to the wireless charging station 102 is completed while the vehicle 114 and the wireless charging station 102 are both still communicating over the CNM's network.
• only initial alignment e.g., getting the passive beacon into the detection range of the wireless charging station 102
• more-precise alignment is completed after the vehicle 114 has switched to the wireless charging station's network, possibly providing a lower-latency channel for communications as part of the alignment process.
• multiple vehicles 114 may simultaneously attempt to park.
• the CNM 104 can assign each vehicle 114 a different beacon channel and inform all the wireless charging stations 102 of all the assigned channels.
• the CNM 104 determines, based on the detected channel, which vehicle 114 to send the wireless charging station's SSID. More information can also be provided from the CNM 104 to the wireless charging stations 102 , such as the vehicle's own identification, to further confirm the correct matching of the wireless charging station to vehicle 114 . In this way, the wireless charging station 102 that detects the beacon signal can confirm that the detected beacon signal is provided by the identified vehicle 114 .
• FIG. 3 illustrates an example electric vehicle charging environment 300 including a parking facility with multiple wireless charging stations 102 for use by electric vehicles 114 (e.g., the VA 1114 - 1 and the VA 2 114 - 2 ).
• the wireless charging stations 102 e.g., GA 1 102 - 1 , GA 2 102 - 2 , GA 3 102 - 3 , GA 4 102 - 4 , GA 5 102 - 5
• each of the wireless charging stations 102 each keep its own local network (e.g., the private network 112 ) up continuously and may provide lower latency for communications between the wireless charging stations 102 and the CNM 104 .
• FIG. 4 depicts a flow chart of an example method 400 for pairing a vehicle to one of multiple wireless charging stations 102 , in relation to the electric vehicle charging environment 300 of FIG. 3 .
• the example method 400 is similar, although not identical, to the method 200 of FIG. 1 .
• the CNM 104 when the vehicle 114 , at step 202 , connects to the CNM 104 over the main wireless network 106 , the CNM 104 , at 212 , assigns a PB channel and, at 214 , communicates the PB channel to the vehicle 114 and the wireless charging stations 102 , as above.
• the wireless charging station 102 (if any) that detects a beacon signal using the assigned channel (at step 222 ) reports this, at step 224 , to the CNM 104 , which then, at step 228 , indicates to the vehicle 114 the SSID of the wireless charging station 102 that detected the beacon signal.
• the vehicle 114 can then, at step 230 , immediately connect to the wireless charging station's network (e.g., the private network 112 ), without waiting for the wireless charging station 102 itself to transition from being a client on the main wireless network 106 to being a source of its own private network 112 .
• the wireless charging station 102 can be both a client and an access point simultaneously, depending on the capabilities of its network hardware.
• the wireless charging stations 102 already have their private networks 112 activated, there is no need for the CNM 104 to instruct the wireless charging station 12 to activate its private network 112 .
• the vehicle 114 has joined the wireless charging station's network (e.g., the private network 112 ), then at step 232 , pairing is complete, and any further configuration and negotiation can be performed between the wireless charging station 102 and the vehicle 114 .
• FIG. 5 illustrates an example device diagram 500 of the central network manager 104 , the wireless charging station 102 , and the vehicle 114 in more detail.
• the device diagram 500 describes devices that can implement various aspects of wireless network pairing for wireless electric vehicle charging.
• the CNM 104 may include processor(s) 502 and memory 504 (computer-readable storage media).
• the vehicle 114 may include processor(s) 506 and memory 508 (computer-readable storage media).
• the wireless charging station(s) 102 may include processor(s) 510 and memory 512 (computer-readable storage media). Any of the processor(s) 502 , 506 , and 510 may be a single-core processor or a multiple-core processor composed of a variety of materials, such as silicon, polysilicon, high-K dielectric, copper, and so on.
• the computer-readable storage media described herein excludes propagating signals.
• the memories 504 , 508 , and 512 may include any suitable memory or storage device such as random-access memory (RAM), static RAM (SRAM), dynamic RAM (DRAM), non-volatile RAM (NVRAM), read-only memory (ROM), or Flash memory useable to store device data 514 of the CNM 104 , device data 516 of the vehicle 114 , and device data 518 of the wireless charging station QQ, respectively.
• the device data 514 of the CNM 104 includes applications and/or an operating system of the CNM 104 that are executable by processor(s) 502 to enable wireless communication with the wireless charging station(s) 102 and the vehicle(s) 114 .
• the device data 516 of the vehicle 114 includes user data, vehicle data (e.g., identification), applications, and/or an operating system of the vehicle 114 that are executable by processor(s) 506 to enable wireless communication with the wireless charging station(s) 102 and the CNM 104 .
• the device data 518 of the wireless charging station 102 includes applications and/or an operating system of the wireless charging station 102 that are executable by processor(s) 510 to enable wireless communication with the CNM 104 and the vehicle(s) 114 .
• the memory 504 of the CNM 104 provides data-storage mechanisms to store device data 514 , as well as various device applications (not shown) and any other types of information and/or data related to operational aspects of the CNM 104 .
• the memory 508 of the vehicle 114 provides data-storage mechanisms to store device data 516 , as well as various device applications (not shown) and any other types of information and/or data related to operational aspects of the vehicle 114 .
• the memory 512 of the wireless charging station 102 provides data-storage mechanisms to store device data 518 , as well as various device applications (not shown) and any other types of information and/or data related to operational aspects of the wireless charging station 102 .
• the memory 504 of the CNM 104 also includes an access-point manager 520 (access-point manager application).
• the access-point manager 520 may be implemented in whole or part as hardware logic or circuitry integrated with or separate from other components of the CNM 104 .
• the access-point manager 520 configures transceiver(s) 522 to implement the techniques described herein for pairing the vehicle 114 to the wireless charging station 102 for wireless electric vehicle charging.
• the access-point manager 520 also configures network interface(s) 524 to relay communications between the central network manager 104 , the wireless charging station 102 , and the vehicle 114 .
• the memory 512 of the wireless charging station 102 includes an access-point manager 526 (access-point manager application).
• the access-point manager 526 may be implemented in whole or part as hardware logic or circuitry integrated with or separate from other components of the wireless charging station 102 .
• the access-point manager 526 configures transceiver(s) 528 to implement the techniques described herein for pairing the wireless charging station 102 to the vehicle 114 for wireless electric vehicle charging.
• the access-point manager 526 also configures network interface(s) 530 for communications with the CNM 104 and/or the vehicle 114 .
• the memory 508 of the vehicle 114 also includes an access manager 532 (access manager application).
• the access manager 532 may be implemented in whole or part as hardware logic or circuitry integrated with or separate from other components of the vehicle 114 .
• the access manager 532 configures transceiver(s) 534 to implement the techniques described herein for communicating with the CNM 104 and for pairing the vehicle 114 to the wireless charging station 102 for wireless electric vehicle charging.
• the access manager 532 also configures network interface(s) 536 for communications between the vehicle 114 and the central network manager 104 and/or the wireless charging station 102 .
• the vehicle 114 also includes a beacon device 538 , which may include a beacon circuit coupled to one or more antenna circuits (not shown) and a controller 540 .
• the controller 540 is configured to control the beacon device 538 .
• the beacon device 538 is configured to control one or more antenna circuits of the vehicle 114 , which may be referred to or configured as beacon loop antennas, such as a passive beacon or an active beacon (e.g., active beacon as described in U.S. patent application Ser. No. 16/284,959 titled “Extended-Range Positioning System Based on Foreign Object Detection”, U.S. patent application Ser. No.
• the beacon device 538 may be integrated into a power receive element 542 , or any other region of the vehicle 114 or the components thereof.
• the controller 540 is configured to control the beacon device 538 by sending control signals to the beacon device 538 .
• the beacon device 538 is configured to change electrical characteristics of the beacon loop antenna in response to the controller's 540 control signals.
• the beacon device 538 can modulate, vary, or modify one or more electrical characteristics of the beacon antenna in response to the controller's 540 control signals.
• the beacon device 538 can impart a distinctive modulation onto the electrical characteristic of the passive beacon, and the distinct modulation pattern may be used by a FOD circuit 544 and controller 546 of the wireless charging station 102 to uniquely identify the beacon device 538 (e.g., passive beacon) from another foreign object, as described in U.S.
• the controller 546 of the wireless charging station 102 is operably coupled to transmit circuitry (not shown) and configured to control one or more aspects of the transmit circuitry or accomplish other operations relevant to wireless network pairing for wireless electric vehicle charging.
• the controller 546 may be a micro-controller or a processor.
• the controller 546 may be implemented as an application-specific integrated circuit (ASIC).
• ASIC application-specific integrated circuit
• the controller 546 may be operably connected, directly or indirectly, to each component of the transmit circuitry.
• the controller 546 may be further configured to receive information from each of the components of the transmit circuitry and perform calculations based on the received information.
• the controller 546 may be configured to generate control signals (e.g., the control signal) for a component that may adjust the operation of that component.
• the controller 546 may be configured to adjust or manage inductive power-transfer based on a result of the operations it performs.
• the memory 512 may be configured to store data, for example, instructions for causing the controller 546 to perform particular functions, such as those related to management of wireless power-transfer and/or foreign object detection and positioning.
• the FOD circuit 544 of the wireless charging station 102 is coupled to the controller 546 and is configured to communicate with the controller 546 .
• the controller 546 is configured to control the FOD circuit 544 .
• the FOD circuit 544 may be coupled to one or more FOD sense circuits (not shown), each including a FOD sense coils (not shown) used to inductively sense a foreign object within a magnetic field (e.g., a metal object, the vehicle 114 , the vehicle power receiving element 542 , the beacon device 538 of the vehicle 114 ).
• Each FOD sense circuit is configured to provide a detection signal indicative of a presence of the foreign object within a predetermined sensing area.
• the FOD circuit 544 then communicates a detection signals to the controller 546 , which is configured to determine the presence and a position of the foreign object relative to one or more of the FOD sense coils based on the detection signals.
• the wireless charging station 102 also includes a power-transmitting element 548 , which is driven by a driver circuit (not shown) at, for example, a resonant frequency of the power-transmitting element 548 based on an input voltage signal.
• the power-transmitting element 548 may generate an electromagnetic field 550 to wirelessly transfer power at a level sufficient for charging a battery (e.g., a battery of the vehicle 114 ) or otherwise powering a load.
• the power-receive element 542 may be used to couple to the electromagnetic field 550 and generate an output power for storing or consumption by the vehicle's battery (or load).
• DSP Digital Signal Processor
• ASIC Application-Specific Integrated Circuit
• FPGA Field-Programmable Gate Array
• a general-purpose hardware processor may be a microprocessor, but in the alternative, the hardware processor may be any conventional processor, controller, microcontroller, or state machine.
• a hardware processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
• a software module may reside in Random Access Memory (RAM), flash memory, Read-Only Memory (ROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, hard disk, a removable disk, a Compact Disc Read-Only Memory (CD-ROM), or any other form of storage medium known in the art.
• RAM Random Access Memory
• ROM Read-Only Memory
• EPROM Electrically Programmable ROM
• EEPROM Electrically Erasable Programmable ROM
• registers hard disk, a removable disk, a Compact Disc Read-Only Memory (CD-ROM), or any other form of storage medium known in the art.
• a storage medium is coupled to the hardware processor such that the hardware processor can read information from, and write information to, the storage medium.
• the storage medium may be integral to the hardware processor.
• Disk and disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-rayTM disc, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
• the hardware processor and the storage medium may reside in an ASIC.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Power Engineering (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Signal Processing (AREA)
• Radar, Positioning & Navigation (AREA)
• General Physics & Mathematics (AREA)
• Physics & Mathematics (AREA)
• Remote Sensing (AREA)
• Computer Security & Cryptography (AREA)
• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Charge And Discharge Circuits For Batteries Or The Like (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Current-Collector Devices For Electrically Propelled Vehicles (AREA)
• Mobile Radio Communication Systems (AREA)

Abstract

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• 2020
  • 2020-12-21 CN CN202080088160.XA patent/CN114867631B/en active Active
  • 2020-12-21 KR KR1020227023674A patent/KR102437818B1/en active Active
  • 2020-12-21 JP JP2022537739A patent/JP7379711B2/en active Active
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  • 2020-12-21 US US17/128,490 patent/US11452028B2/en active Active
  • 2020-12-21 KR KR1020227028834A patent/KR20220119770A/en active Pending
• 2022
  • 2022-08-09 US US17/818,658 patent/US20220386221A1/en not_active Abandoned

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