Rapid transfer of stored energy

• US 8,482,263 B2
• Filed: 07/23/2009
• Issued: 07/09/2013
• Est. Priority Date: 08/01/2008
• Status: Active Grant

• Current Assignee: Logitech Europe S A (Logitech International SA)
• Original Assignee: Logitech Europe S A (Logitech International SA)
• Inventors: Vexo, Frederic, Eichenberger, Pascal, Barrade, Philippe, Birbaum, Yves
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): TORRES RUIZ, JOHALI ALEJANDRA
• Application Number:
  US12/508,261
• Publication Number:
  US 20100026248A1
• Time in Patent Office: 1,447 Days
• Field of Search: 320/166
• US Class Current: 320/166
• CPC Class Codes: H02J 7/342 The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging with circuits for polarity protection H02J7/0034
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices

Abstract

A disclosed method (and system) corresponds to rapidly charging a rechargeable device. An embodiment of the method comprises charging a first supercapacitor attached to a charging unit. In response to the device coupling to the charging unit, determining whether the charging unit is authorized to charge the device. The first supercapacitor discharging in response to the determining that the charging unit is authorized to charge the device, the discharging of the first supercapacitor resulting in a first current being generated. The first current is transferred to the device through an output of the charging unit for charging a second supercapacitor included in the device. The amount of the first current generated is regulated. In response to the to the voltage at the output increasing at a rate above a set threshold, reducing the rate at which the voltage is increasing.

Claims

1. A method for rapidly charging a rechargeable device, the method comprising:

charging a first supercapacitor included in a charging unit;

responsive to the device coupling to the charging unit, determining whether the charging unit is authorized to charge the device;

responsive to determining that the charging unit is authorized to charge the device, discharging the first supercapacitor, the discharging of the first supercapacitor resulting in a first current being generated;

transferring the first current to the device through an output of the charging unit for charging a second supercapacitor included in the device;

responsive to a voltage at the output increasing at a rate above a set threshold, reducing, by a filter, the rate at which the voltage is increasing; and

responsive to reducing the rate at which the voltage is increasing, preventing, by a converter, the voltage from increasing at the output.

2. A charging unit for rapidly charging a rechargeable device, the charging unit comprising:

a supercapacitor charger controller configured to control the charging of a first supercapacitor included in the charging unit;

an output controller configured to determine whether the charging unit is authorized to charge the device in response to the device coupling to the charging unit;

the first supercapacitor configured to discharge in response to the output controller determining that the charging unit is authorized charge the device, the discharging of the first supercapacitor resulting in a first current being generated and transferred to the device through an output of the charging unit for charging a second supercapacitor included in the device;

a filter configured to reduce the rate at which a voltage at the output is increasing in response to the voltage at the output increasing at a rate above a set threshold; and

a converter configured to prevent the voltage from increasing at the output responsive to reducing the rate at which the voltage is increasing.

3. A method for rapidly charging a rechargeable device, the method comprising:

charging a first supercapacitor included in a charging unit;

responsive to the device coupling to the charging unit, discharging the first supercapacitor, the discharging of the first supercapacitor resulting in a first current being generated;

transferring the first current to the device through an output of the charging unit for charging a second supercapacitor included in the device;

responsive to a voltage at the output increasing at a rate above a set threshold, reducing, by a filter, the rate at which the voltage is increasing; and

responsive to reducing the rate at which the voltage is increasing, preventing, by a converter, the voltage from increasing at the output.

4. The method of claim 3, wherein charging a first supercapacitor further comprises:

responsive to measuring a voltage of the first supercapacitor at a maximum voltage of the first supercapacitor, stopping the charging of the first supercapacitor.

5. The method of claim 3, wherein discharging the first supercapacitor further comprises:

responsive to measuring a voltage of the first supercapacitor at half of a maximum voltage of the first supercapacitor, stopping the discharging of the first supercapacitor.

6. The method of claim 3, wherein discharging the first supercapacitor further comprises:

responsive to receiving from the device an indication that the second supercapacitor is fully charged, stopping the discharging of the first supercapacitor.

7. The method of claim 3, wherein discharging the first supercapacitor comprises:

determining whether the charging unit is authorized to charge the device; and

responsive to determining that the charging unit is authorized to charge the device, discharging the first supercapacitor.

8. The method of claim 7, wherein determining whether the charging unit is authorized to charge the device comprises:

receiving an identification code from the device;

comparing the received identification code to a plurality of stored identification codes; and

responsive to the identification code matching one of the plurality of stored identification codes, determining that the charging unit is authorized to charge the device.

9. The method of claim 7, wherein determining whether the charging unit is authorized to charge the device comprises:

transmitting a first signal to a radio frequency identification (RDIF) tag of the device;

receiving a second signal from the RFID tag;

identifying the RFID tag based on the second signal;

comparing the RFID tag to a stored set of RFID tags; and

responsive to the RFID tag matching an RFID tag included in the stored set, determining that the charging unit is authorized to charge the device.

10. The method of claim 3, further comprising regulating the amount of the first current being transferred to the device.

11. The method of claim 3, further comprising:

transferring a second current to the device through an additional output of the charging unit for charging a rechargeable battery included in the device.

12. The method of claim 11, wherein the second current is transferred at the same time as the first current is being transferred.

13. The method of claim 11, wherein the second current is transferred in response to stopping the transfer of the first current and the device remaining coupled to the charging unit.

14. The method of claim 3, wherein the device is a computer mouse, a remote control, a mobile telephone, or a keyboard.

15. A charging unit for rapidly charging a rechargeable device, the charging unit comprising:

a supercapacitor charger controller configured to control the charging of a first supercapacitor;

the first supercapacitor configured to discharge in response to the device coupling to the charging unit, the discharging of the first supercapacitor resulting in a first current being generated and transferred to the device through an output of the charging unit for charging a second supercapacitor included in the device;

a filter configured to reduce the rate at which a voltage at the output is increasing in response to the voltage at the output increasing at a rate above a set threshold; and

a converter configured to prevent the voltage from increasing at the output responsive to reducing the rate at which the voltage is increasing.

16. The charging unit of claim 15, wherein the supercapacitor charger controller is further configured to:

stop the charging of the first supercapacitor in response to measuring a voltage of the first supercapacitor at a maximum voltage of the first supercapacitor.

17. The charging unit of claim 15, wherein the converter is further configured to:

stop the discharging of the first supercapacitor in response to measuring a voltage of the first supercapacitor at half of a maximum voltage of the first supercapacitor.

18. The charging unit of claim 15, wherein the converter is further configured to:

stop the discharging of the first supercapacitor in response to receiving from the device an indication that the second supercapacitor is fully charged.

19. The charging unit of claim 15, further comprising:

an output controller configured to determine whether the charging unit is authorized to charge the device; and

the first supercapacitor configured to discharge in response the output controller determining that the charging unit is authorized to charge the device.

20. The charging unit of claim 19, wherein the output controller is further configured to:

receive an identification code from the device;

compare the received identification code to a plurality of stored identification codes; and

determine that the charging unit is authorized to charge the device in response to the identification code matching one of the plurality of stored identification codes.

21. The charging unit of claim 19, wherein the output controller is further configured to:

transmit a first signal to a radio frequency identification (RFID) tag of the device;

receive a second signal from the RFID tag;

identify the RFID tag based on the second signal;

compare the RFID tag to a stored set of RFID tags; and

determine that the charging unit is authorized to charge the device in response to the RFID tag being included in the stored set of RFID tags.

22. The charging unit of claim 15, wherein the converter is further configured to regulate the amount of the first current being transferred to the device.

23. The charging unit of claim 15, further comprising a second converter configured to transfer a second current to the device through an additional output of the charging unit for charging a rechargeable battery included in the device.

24. The charging unit of claim 23, wherein the second current is transferred at the same time as the first current is being transferred.

25. The charging unit of claim 23, wherein the second current is transferred in response to stopping the transfer of the first current and the device remaining coupled to the charging unit.

26. The charging unit of claim 23, wherein the device is a computer mouse, a remote control, a mobile telephone, or a keyboard.