Ultracapacitor-based power supply for an electronic device

• US 20040036449A1
• Filed: 08/23/2002
• Published: 02/26/2004
• Est. Priority Date: 08/23/2002
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Bean, Heather N., Robins, Mark N., Flach, Matt
• Application Number:
  US10/226,544
• Publication Number:
  US 20040036449A1
• Time in Patent Office: Days
• US Class Current: 320/166
• CPC Class Codes: H02J 7/345 using capacitors as storage or buffering devices

Abstract

An ultracapacitor-based power supply (Ultracapacitor Supply) and method power a portable electronic device. The Ultracapacitor Supply includes an ultracapacitor that stores energy rapidly relative to a battery-based power supply. The stored energy is used to provide primary power to the device. The electronic device includes operational electronics that require power to operate and an integral power supply. The device uses the Ultracapacitor Supply as one or both of the integral power supply and an auxiliary power source. As an auxiliary source, the Ultracapacitor Supply provides primary power to the device operational electronics from external to the device on a temporary basis when the device integral supply is depleted or otherwise unavailable. The auxiliary source serves as an emergency or back-up power supply. As the integral source, the Ultracapacitor Supply provides primary power to the operational electronics from inside the device on a relatively regular basis.

Claims

1. An ultracapacitor-based power supply for a portable electronic device comprising:

an ultracapacitor, wherein energy stored in the ultracapacitor provides a source of primary operational power to power the portable electronic device.

2. The power supply of claim 1, wherein the ultracapacitor is integral to the portable electronic device to provide primary operational power on a regular basis.

3. The power supply of claim 1, wherein the ultracapacitor is separate from and connectable to the portable electronic device, the ultracapacitor providing auxiliary primary operational power to the electronic device on a temporary basis when connected to the electronic device, the auxiliary power temporarily replacing power from an integral primary power supply of the device when the integral primary power supply is one or both of depleted and unavailable.

4. The power supply of claim 3, wherein the portable electronic device comprises the integral primary power supply, the integral primary power supply being one of a battery-based power supply and the ultracapacitor-based power supply.

5. The power supply of claim 1, further comprising:

means for converting power acquired from an external energy source; and

means for connecting to the external energy source,

wherein an output of the power converting means is connected to the ultracapacitor, an output of the connecting means being connected to an input of the power converting means, and wherein the power acquired from the external energy source is stored as energy by the ultracapacitor.

6. The power supply of claim 5, wherein the power converter means comprises one or both of an alternating current (AC) to direct current (DC) converter to convert an AC external energy source and a DC-to-DC converter to convert a DC external energy source.

7. The power supply of claim 1, further comprising means for power conditioning connected to an output of the ultracapacitor, the power conditioning means modifying the energy stored in the ultracapacitor before the stored energy is provided to power the portable electronic device.

8. The power supply of claim 1, wherein the portable electronic device is one of a digital camera, a video camera, a laptop computer, a personal digital assistant, a pocket computer, a compact disk (CD) player, an MP3 player, a portable radio, an electronic toy, and a cellular telephone.

9. The power supply of claim 1, wherein the ultracpacitor is energized and re-energized rapidly relative to recharging a battery-based power supply.

10. A portable electronic device comprising:

operational electronics; and

an ultracapacitor-based power supply comprising an ultracapacitor,

wherein the ultracapacitor stores energy for and supplies primary operational power to the operational electronics, and

wherein the operational electronics and the power supply are enclosed together in a housing.

11. The device of claim 10, wherein the ultracpacitor-based power supply further comprises:

a charging port for connecting to an external energy source through a wall of the housing; and

means for converting power connected between the charging port and an input of the ultracapacitor,

wherein energy from the external energy source acquired with the charging port is converted by the power converting means into a form suitable for storage by the ultracapacitor.

12. The device of claim 11, wherein the charging port comprises a plug adapted to be received by one or both of an alternating current (AC) outlet connected to an AC energy source and a direct current (DC) auxiliary equipment port connected to a DC energy source.

13. The device of claim 12, wherein the charging port plug is integral to the housing, the plug being one of foldable against, retractable into and fixedly extended from the housing.

14. The device of claim 10, wherein the device is a digital camera, the operational electronics comprising:

a processor;

an imaging subsystem; and

memory,

wherein the processor controls the imaging subsystem and memory, the imaging subsystem being controlled to create digitized images as image files that are stored by the processor in the memory.

15. The device of claim 10, further comprising an integral electrical interface that extends externally from a wall of the housing, the interface being electrically connected through the housing wall to the enclosed ultracapacitor-based power supply, the interface being adapted to be received by an outlet of an external energy source, such that when the ultracapacitor periodically requires energizing, the interface is temporarily received by the outlet to energize the ultracapacitor.

16. An auxiliary ultracapacitor-based power supply for powering a portable electronic device comprising:

an ultracapacitor enclosed in a housing,

wherein the ultracapacitor serves as a short-term, auxiliary power source for the electronic device using energy stored in the ultracapacitor.

17. The auxiliary power supply of claim 16, wherein auxiliary power is provided to the electronic device as primary operational power when an integral power supply of the electronic device is one or both of depleted of power and unavailable to supply primary operational power.

18. The auxiliary power supply of claim 16, further comprising means for directly connecting the power supply housing externally to a wall of the electronic device, the connecting means temporarily attaching to the device wall to electrically connect the ultracapacitor to electronics within the device to provide auxiliary primary power.

19. The auxiliary power supply of claim 16, further comprising means for electrically connecting the ultracapacitor to electronics within the device to provide auxiliary primary power directly to the electronics, wherein the electrically connecting means comprises a power cord having a connector at one end that is adapted to be received by a mating connector of the device.

20. The auxiliary power supply of claim 16, further comprising:

a charging port for connecting to an external energy source through the housing; and

a power converter connected between the charging port and an input of the ultracapacitor,

wherein energy from the external energy source acquired through the charging port is converted by the power converter into a form suitable for storage by the ultracapacitor.

21. The auxiliary power supply of claim 20, wherein the charging port comprises an electrical plug that is one of foldable against, retractable into and fixedly extended from the housing, the plug being adapted to be received by one or both of an alternating current (AC) electrical outlet when the external energy source is an AC energy source and a direct current (DC) auxiliary equipment port when the external energy source is of a DC energy source.

22. An electronic device comprising:

operational electronics;

an integral power supply that supplies primary operational power to the electronics; and

means for receiving auxiliary primary power from a portable external power source when the integral power supply is unavailable, wherein the operational electronics, the integral power supply and the receiving means are enclosed by a device housing, and

wherein the receiving means receives auxiliary power from the portable external source, such that the portability of the electronic device is maintained while receiving the auxiliary primary power.

23. The portable electronic device of claim 22, wherein the portable external power source is an auxiliary ultracapacitor-based power supply comprising an ultracapacitor that stores energy that is used to provide the auxiliary primary power.

24. The portable electronic device of claim 23, wherein the ultracapacitor of the auxiliary ultracapacitor-based power supply is energized very rapidly relative to the integral power supply, such that auxiliary primary power is readily available when power from the integral power supply is depleted.

25. The portable electronic device of claim 22, wherein the auxiliary power receiving means comprises a device connector extending through a wall of the device housing, the portable auxiliary power source comprising a mating connector that is complementary to the device connector, such that when connected, the auxiliary power source is directly attached to the device housing wall and electrically connected to provide primary power to the operational electronics.

26. The portable electronic device of claim 22, wherein the auxiliary power receiving means comprises a device connector extending through a wall of the device housing, the portable auxiliary power source comprising a power cord and a mating connector at one end of the power cord, the mating connector being complementary to the device connector, such that when connected, the auxiliary power source is indirectly attached to the device housing wall and electrically connected to provide primary power to the operational electronics.

27. The portable electronic device of claim 23, wherein the auxiliary ultracapacitor-based power supply further comprises:

means for charging the ultracapacitor that is connectable to an external energy source; and

means for converting power from the external energy source to the ultracapacitor,

wherein the charging means is connected to an input of the power converting means, an output of the power converting means being connected to an input of the ultracapacitor, the charging port means comprising a port adapted to be received by one or both of an alternating current (AC) outlet of an AC external energy source and a direct current (DC) port of a DC external energy source, and

wherein the power converting means comprises one or both of an AC to DC converter and a DC-to-DC converter to convert energy from a respective external energy source into a DC energy that is suitable for storage in the ultracapacitor.

28. A method of powering an electronic device comprising:

energizing an ultracapacitor using energy acquired from an external energy source;

converting energy stored in the ultracapacitor into a form suitable for powering the device; and

powering the device using the converted energy.

29. The method of power of claim 28, wherein powering the device using the converted energy comprises one of applying the converted energy directly to circuitry of the electronic device and applying the converted energy to an external power supply port of the electronic device.

30. The method of claim 28, wherein the converted energy used for powering the device serves as a primary power source for the electronic device, and wherein powering the device using the converted energy is employed as one or both of an integral primary power source and as a temporary primary power source for the device, the temporary source being available when the integral primary power source is one or both of depleted and unavailable.