Wirelessly chargeable portable power bank

Patent metadata

Field	Value
Publication number	US-10727686-B2
Application number	US-201816010318-A
Country	US
Kind code	B2
Filing date	Jun 15, 2018
Priority date	Jun 15, 2017
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

A power bank includes, in part, a rechargeable battery, a wireless power recovery unit adapted to receive power wirelessly, a battery charging circuit adapted to deliver the power recovered by the power recovery unit to the rechargeable battery, an output interface, and a voltage reconditioning circuit adapted to supply power from the rechargeable battery to the output interface for delivery to an external device. The wireless power recovery unit may include one or more of a multitude of photodiodes adapted to convert a coherent optical signal to electrical power, an acoustic transducer adapted to convert acoustic waves to an electrical power, an inductive coupling circuit adapted to convert time varying magnetic flux to electrical power, and an RF power recovery unit adapted to convert an RF signal to electrical power.

First claim

What is claimed is:

1. A power bank comprising:
a rechargeable battery;
a wireless power recovery unit adapted to receive power wirelessly;
a battery charging circuit adapted to deliver the power recovered by the power recovery unit to the rechargeable battery;
an output interface; and
a voltage reconditioning circuit adapted to supply power from the rechargeable battery to the output interface for delivery to an external device, wherein said wireless power recovery unit includes a plurality of photodiodes adapted to convert a coherent optical signal to electrical power.

2. A power bank comprising:
a rechargeable battery;
a wireless power recovery unit adapted to receive power wirelessly;
a battery charging circuit adapted to deliver the power recovered by the power recovery unit to the rechargeable battery;
an output interface; and
a voltage reconditioning circuit adapted to supply power from the rechargeable battery to the output interface for delivery to an external device, wherein said wireless power recovery unit includes an acoustic transducer adapted to convert acoustic waves to an electrical power.

3. A power bank comprising:
a wireless power recovery unit adapted to receive power wirelessly;
a battery charging circuit adapted to deliver the power recovered by the power recovery unit to the rechargeable battery;
an output interface; and
a voltage reconditioning circuit adapted to supply power from the rechargeable battery to the output interface for delivery to an external device, wherein said wireless power recovery unit includes an RF power recovery unit adapted to convert an RF signal to electrical power.

4. The power bank of claim 3 further comprising:
an input interface adapted to supply power to the power bank via a wired connection.

5. The power bank of claim 4 further comprising a voltage sensing circuitry adapted to select between the power supplied by the wireless power recovery unit and the power supplied by the input interface, the selected power being supplied to the rechargeable battery.

6. The power bank of claim 3 further comprising:
a controller adapted to monitor the rechargeable battery; and
a wireless link adapted to receive and transmit information.

7. The power bank of claim 6 wherein said controller is further adapted to notify a user, via a mobile device associated with the user, to cause the power bank to be charged.

8. The power bank of claim 6 wherein said controller is further adapted to receive instructions from a mobile device to cause the power bank to be charged when one or more conditions are satisfied.

9. The power bank of claim 8 wherein said instructions cause the power recovery unit to charge the rechargeable battery if the charge stored in the rechargeable battery is detected as falling below a threshold level.

10. A power bank comprising:
an RF power recovery unit adapted to convert an RF signal to electrical power; and
an inductive coupling circuit adapted to convert the power supplied by the RF power recovery unit to a time varying magnetic flux.

11. A method of power delivery comprising:
recovering power wirelessly;
delivering the recovered power to a rechargeable battery;
conditioning a voltage received from the rechargeable battery; and
supplying the conditioned voltage to an output interface for delivery to an external device, wherein said power is recovered by a plurality of photodiodes adapted to convert a coherent optical signal to electrical power.

12. A method of power delivery comprising:
recovering power wirelessly;
delivering the recovered power to a rechargeable battery;
conditioning a voltage received from the rechargeable battery; and
supplying the conditioned voltage to an output interface for delivery to an external device, wherein said power is recovered by an acoustic transducer adapted to convert acoustic waves to an electrical power.

13. A method of power delivery comprising:
recovering power wirelessly;
delivering the recovered power to a rechargeable battery;
conditioning a voltage received from the rechargeable battery; and
supplying the conditioned voltage to an output interface for delivery to an external device, wherein said power is recovered by an RF power recovery unit adapted to convert an RF signal to electrical power.

14. The method of claim 13 further comprising:
supplying power to the rechargeable battery via a wired connection.

15. The method of claim 14 further comprising:
selecting between the recovered power and the power supplied by the wired connection; and
delivering the selected power to the rechargeable battery.

16. The method of claim 13 further comprising:
monitoring a status of the rechargeable battery; and
wirelessly communicating the status.

17. The method of claim 16 further comprising:
notifying a user via a mobile device associated with the user to cause the rechargeable battery to be charged.

18. The method of claim 13 further comprising:
transmitting instructions wirelessly to cause the rechargeable battery to be charged when one or more conditions are satisfied.

19. The method of claim 18 wherein said condition defines a voltage level of the rechargeable battery.

20. A method of power delivery comprising:
converting an RF signal to electrical power; and
converting the electrical power to a time varying magnetic flux.

Assignees

• California Inst Of Techn

Inventors

• Abiri Behrooz
• Bohn Florian
• Hajimiri Seyed Ali

Classifications

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J2207/20

  Charging or discharging characterised by the power electronics converter · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/30

  using light, e.g. lasers · CPC title

• H02J2207/40

  adapted for charging from various sources, e.g. AC, DC or multivoltage · CPC title