INPUT POWER APPRAISAL BASED WIRELESS POWER SYSTEM

• US 20160372963A1
• Filed: 08/31/2016
• Published: 12/22/2016
• Est. Priority Date: 07/28/2012
• Status: Active Grant

• Current Assignee: WiPQTUS Inc.
• Original Assignee: WiPQTUS Inc.
• Inventors: Sankar, Ganapathy
• Granted Patent: US 10,581,272 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02J 3/322 the battery being on-board an electric or hybrid vehicle, e.g. vehicle to grid arrangements [V2G], power aggregation, use of the battery for network load balancing, coordinated or cooperative battery charging
• CPC Class Codes: H02J 50/05 using capacitive coupling
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/00714 in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A wireless power system (WPS) has a wireless power transmitter (WPT) that appraises an input power available to a power inverter from one or more input power sources. The WPT comprises the power inverter that wirelessly transmits power to a wireless power receiver (WCR) of the WPS, and a power appraiser circuit (PAC). The PAC ascertains maximum input power available to the power inverter from the input power sources. The PAC includes a variable load connected to a path carrying the input power to the power inverter or one or more input pins that receive power ratings of the input power sources that indicate available maximum input power from the input power sources. The ascertaining of maximum input power available to the power inverter from the input power sources appraises the input power available to the power inverter. The WCR receives information representing maximum power deliverable by the WPT.

Claims

1. A wireless power system comprising:

a wireless power transmitter operatively connected to an input power source, said wireless power transmitter configured to deliver power from said input power source wirelessly to one or more wireless power receivers that are placed within its charging zone

one or more said wireless power receivers configured to receive power wirelessly, said wireless power receivers configured to deliver said received power to their respective load

wherein said wireless power transmitter performs one or more of;

sensing the removal of one or more said wireless power receivers from its said charging zone and taking appropriate action in conjunction with said wireless power receivers that are still within its said charging zone to ensure that said transfer of power to said load of said wireless power receivers that are still within its said charging zone remains stable.

sensing the insertion of one or more newly placed wireless power receivers into its said charging zone and taking appropriate action in conjunction with said wireless power receivers that are in its said charging zone to ensure that said transfer of power to said load of all said wireless power receivers that are within its said charging zone is stable.

5. The wireless power system of claim 1, wherein said wireless power transmitter flexibly partitions and distributes the available power from the input power source to one or more said wireless power receivers that are placed in its said charging zone based on one of a fixed algorithm and a dynamic algorithm.

7. The wireless power system of claim 1, wherein said wireless power transmitter negotiates a new amount of available power from said input power source to accommodate the needs of one or more said wireless power receivers that are in said wireless power transmitter'"'"'s charging zone.

2. A wireless power system comprising:

a wireless power transmitter operatively connected to an input power source, said wireless power transmitter configured to deliver power from said input power source wirelessly to one or more wireless power receivers that are placed within its charging zone

one or more said wireless power receivers configured to receive power wirelessly, said wireless power receivers configured to deliver said received power to their respective load

wherein said wireless power receiver senses violation of power transfer contract that said wireless power receiver had previously negotiated with said wireless power transmitter in whose said charging zone said wireless power receiver has been placed in, said wireless power receiver takes appropriate action in conjunction with said wireless power transmitter to renegotiate a new said power transfer contract and update its circuitry to ensure that said transfer of power to its said load is stable.

3. The wireless power system of claim 2, wherein said wireless power receiver senses violation of guaranteed maximum power delivery that said wireless power receiver had previously negotiated with said wireless power transmitter in whose said charging zone said wireless power receiver has been placed in, said wireless power receiver takes appropriate action in conjunction with said wireless power transmitter to renegotiate a new said guaranteed maximum power delivery based on which said wireless power receiver updates its circuitry to ensure that said transfer of power to its said load is stable.

4. The wireless power system of claim 2, wherein said wireless power receiver senses violation of safety limits of its operating parameters while receiving power from said wireless power transmitter in whose said charging zone said wireless power receiver has been placed in, said wireless power receiver takes appropriate action in conjunction with said wireless power transmitter to renegotiate a new said power transfer contract based on which said wireless power receiver updates its circuitry to ensure that said transfer of wireless power to its said load is stable and its said operating parameters do not violate their said safety limits.

6. The wireless power system of claim 2, wherein said wireless power transmitter flexibly partitions and distributes the available power from the input power source to one or more said wireless power receivers that are placed in its said charging zone based on one of a fixed algorithm and a dynamic algorithm.

8. The wireless power system of claim 2, wherein said wireless power transmitter negotiates a new amount of available power from said input power source to accommodate the needs of one or more additional said wireless power receivers that are in said wireless power transmitter'"'"'s charging zone.

9. A method for maintaining stability of power transfer from wireless power transmitter'"'"'s input power source to load of wireless power receiver when one or more said wireless power receivers are removed or inserted from charging zone of said wireless power transmitter,

said wireless power transmitter performing one or more of:

sensing removal of one or more said wireless power receivers from the said charging zone of said wireless power transmitter, recalculating the power distribution configuration among one or more said wireless power receivers that are still in the said charging zone of said wireless power transmitter and sending message to said wireless power receivers with information for said wireless power receivers to update their respective maximum output power limits of power delivery to their respective loads.

sensing insertion of one or more said wireless power receivers newly placed in the said charging zone of said wireless power transmitter, receiving messages from the newly placed said wireless power receivers, recalculating the power distribution configuration among said wireless power receivers that are in the said charging zone of said wireless power transmitter, sending a renegotiate message to one or more said wireless power receivers that were previously placed in the said charging zone of said wireless power transmitter, receiving various information from previously placed said wireless power receivers and sending message to said wireless power receivers with information for said wireless power receivers to update their respective maximum output power limits of power delivery to their respective loads.

sensing insertion of one or more said wireless power receivers into the said charging zone of said wireless power transmitter, momentarily terminating said power transfer to all said wireless power receivers, restarting power delivery to all said wireless power receivers, receiving various information from said wireless power receivers, recalculating the power distribution configuration among one or more said wireless power receivers that are in the said charging zone of said wireless power transmitter and sending message to said wireless power receivers with information for said wireless power receivers to update their respective maximum output power limits of power delivery to their respective loads.

sensing insertion of one or more said wireless power receivers newly placed in the said charging zone of said wireless power transmitter, receiving messages from the newly placed said wireless power receivers, sending a renegotiate message to said wireless power receivers that had been previously placed in the said charging zone of said wireless power transmitter, receiving various information from previously placed said wireless power receivers, recalculating the power distribution configuration among said wireless power receivers that are in the said charging zone of said wireless power transmitter, and sending message to said wireless power receivers with information for said wireless power receivers to update their respective maximum output power limits of power delivery to their respective loads.

said wireless power receiver potentially performing;

sensing violation of power transfer contract that said wireless power receiver had previously negotiated with said wireless power transmitter in whose said charging zone said wireless power receiver has been placed in, sending a renegotiate message to said wireless power transmitter and sharing other information needed to re-establish the power transfer contract, receiving message from said wireless power transmitter with information for said wireless power receiver to update its maximum output power limit for power delivery to said load.