Electrical energy-generating heat sink system and method of using same to recharge an energy storage device

• US 20050029903A1
• Filed: 06/30/2004
• Published: 02/10/2005
• Est. Priority Date: 11/16/2001
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Tadayon, Pooya, Zaerpoor, Koorosh
• Granted Patent: US 7,411,337 B2
• Time in Patent Office: Days
• US Class Current: 310/314
• CPC Class Codes: F01K 3/185 using waste heat from outside the plant F02G5/00 takes precedence
• CPC Class Codes: F03G 7/00 Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
• CPC Class Codes: H02N 2/18 producing electrical output from mechanical input, e.g. generators for measurement devices G01

Abstract

An electrical energy-generating heat sink system provides a convenient and economical method for continuously recharging an energy storage device in electronic devices.

Claims

1. An electrical energy-generating system comprising:

a heat transfer device responsive to heat generated by a microprocessor;

a vapor-pressurizing device thermally coupled to the heat transfer device; and

an electricity-generating device thermally coupled to the vapor-pressurizing device, the electricity-generating device comprising a pressure plate and one or more piezoelectric crystals, the pressure plate adapted to contact the one or more piezoelectric crystals when exposed to a sufficiently high vapor pressure.

2. The electrical energy-generating system of claim 1 wherein the electricity-generating device is contained within the heat transfer device.

3. The electrical energy-generating system of claim 2 wherein the heat transfer device contains a working fluid.

4. The electrical energy-generating system of claim 3 wherein the working fluid is a dielectric.

5. The electrical energy-generating system of claim 4 wherein the dielectric is a hydrofluoroether or chlorofluorocarbon.

6. The electrical energy-generating system of claim 4 wherein the working fluid is selected from the group consisting of deionized water, ammonia, acetone and methanol.

7. The electrical energy-generating system of claim 1 wherein the vapor-pressurizing device is a compressor or a one-way pressure valve.

8. The electrical energy-generating system of claim 1 wherein the pressure plate comprises a base portion having a top surface and a bottom surface, the top surface having one or more spikes located thereon for contacting the one or more piezoelectric crystals, the bottom surface oriented for exposure to the sufficiently high vapor pressure.

9. The electrical energy-generating system of claim 8 wherein the pressure plate is made from aluminum or plastic.

10. The electrical energy-generating system of claim 1 wherein each of the one or more piezoelectric crystals is a quartz crystal.

11. The electrical energy-generating system of claim 1 wherein the one or more piezoelectric crystals are secured in place using physical vapor deposition or chemical vapor deposition.

12. The electrical energy-generating system of claim 1 wherein the sufficiently high vapor pressure is between 10 and 30 psi above equilibrium.

13. The electrical energy-generating system of claim 12 further comprising a cooling device, wherein vapor enters the cooling device when it reaches a sufficiently low vapor pressure.

14. The electrical energy-generating system of claim 13 wherein the sufficiently low vapor pressure is between 10 and 30 psi above equilibrium.

15. The electrical energy-generating system of claim 8 wherein the pressure plate moves a total distance of less than about 500 microns during exposure to the sufficiently high vapor pressure.

16. The electrical energy-generating system of claim 15 wherein each of the one or more piezoelectric crystals deforms when contacted by the one or more spikes.

17. The electrical energy-generating system of claim 2 wherein the heat transfer device is a heat pipe or thermosyphon.

18. The electrical energy-generating system of claim 17 wherein the heat transfer device is a vapor chamber heat sink.

19. The electrical energy-generating system of claim 18 wherein the vapor chamber heat sink contains separate evaporator and condenser sections fluidly coupled together.

20. The electrical energy-generating system of claim 18 wherein the vapor chamber heat sink is a heat pipe having a wick.

21. The electrical energy-generating system of claim 18 wherein the vapor chamber heat sink comprises a hollow vapor chamber base coupled to a plurality of fins.

22. The electrical energy-generating system of claim 21 further comprising a chamber contained within the hollow vapor chamber base, the chamber adapted to house the electricity-generating device.

23. The electrical energy-generating system of claim 22 wherein electricity generated by the electricity-generating device is routed to a rechargeable energy storage device.

24. The electrical energy-generating system of claim 23 wherein the rechargeable energy storage device is a battery.

25. The electrical energy-generating system of claim 1 wherein the vapor-pressurizing device and electricity-generating device are micro-electrical mechanical systems (MEMS) devices.

26. An electrical energy-generating heat sink system comprising:

a vapor chamber heat sink containing a working fluid;

a vapor-pressurizing device fluidly coupled to the vapor chamber heat sink;

one or more piezoelectric crystals in contact with the vapor chamber heat sink; and

an electricity-generating device thermally coupled to the vapor-pressurizing device, the electricity-generating device comprising a pressure plate adapted to contact the one or more piezoelectric crystals when exposed to a sufficiently high vapor pressure and configured to provide electrical energy to a rechargeable battery in an electronic device.

27. The electrical energy-generating heat sink system of claim 26 wherein the electronic device is a notebook computer.

28. The electrical energy-generating heat sink system of claim 27 wherein the system increases run-time of the rechargeable battery in the notebook computer by at least ten percent.

50. The electrical energy-generating heat sink system of claim 26 wherein the pressure plate comprises a base portion having a top surface and a bottom surface, the top surface having one or more spikes located thereon for contacting the one or more piezoelectric crystals, the bottom surface oriented for exposure to the sufficiently high vapor pressure.

51. The electrical energy-generating heat sink system of claim 50 wherein each of the one or more piezoelectric crystals is a quartz crystal.

29. An integrated circuit package comprising:

a heat transfer device having an integrated circuit mating surface;

a vapor-pressurizing device coupled to the heat transfer device; and

an electricity-generating device coupled to the vapor-pressurizing device, the electricity-generating device comprising a pressure plate and one or more piezoelectric crystals, the pressure plate adapted to contact the one or more piezoelectric crystals when exposed to a sufficiently high vapor pressure.

30. The integrated circuit package of claim 29 further comprising a cooling device coupled to the electricity-generating device and to the heat transfer device, the cooling device configured to cool excess vapor from the electricity-generating device for use again in the heat transfer device.

31. The integrated circuit package of claim 30 wherein the cooling device is a thermoelectric cooler, a condenser or a one-way pressure valve.

32. The integrated circuit package of claim 30 wherein the cooling device is integral with the heat generating device, further wherein the heat generating device is a vapor chamber heat sink.

33. The integrated circuit package of claim 32 further comprising a fan thermally coupled to the vapor chamber heat sink.

34. The integrated circuit package of claim 29 further comprising an integrated circuit die thermally coupled to the integrated circuit mating surface of the heat transfer device.

35. A notebook computer comprising:

a rechargeable battery; and

an electrical energy-producing heat sink system coupled to the rechargeable battery, the electrical energy-producing heat sink system comprising a pressure plate and one or more piezoelectric crystals, wherein the pressure plate is adapted to contact the one or more piezoelectric crystals when exposed to a sufficiently high vapor pressure.

36. The notebook computer of claim 35 further wherein the pressure plate comprises a base portion having a top surface and a bottom surface, the top surface having an array of spikes located thereon for contacting the one or more piezoelectric crystals, the bottom surface oriented for exposure to the sufficiently high vapor pressure.

37. The notebook computer of claim 36 wherein the system increases run-time for the notebook computer by at least ten percent.

38. A battery charger comprising:

a vapor-producing device;

a vapor-pressurizing device thermally coupled to the vapor-producing device, wherein the vapor-producing device is adapted to intake heat from an integrated circuit package and expel vapor to the vapor-pressurizing device;

a mechanical energy-producing device mechanically coupled to the vapor-pressurizing device;

an electrical energy-producing device mechanically coupled to the mechanical energy-producing device, the electrical energy-producing device comprising a pressure plate and one or more piezoelectric crystals, the pressure plate adapted to contact the one or more piezoelectric crystals when exposed to a sufficiently high vapor pressure; and

a current supplying device electrically connected to the electrical energy-producing device and to a battery.

39. The battery charger of claim 38 wherein the vapor producing device is a vapor chamber heat sink.

40. The battery charger of claim 38 further comprising a vapor reliquifying device coupled to the vapor-pressurizing device.

41. The battery charger of claim 38 wherein the current supplying device is an electrical wire.

42. A method for providing electrical energy to a rechargeable energy storage device comprising:

vaporizing a working fluid in thermal contact with a heat generating device to produce vapor;

pressurizing the vaporized fluid to produce pressurized vapor;

contacting a bottom surface of a pressure plate with the pressurized vapor to produce mechanical energy; and

converting the mechanical energy to electrical energy with one or more piezoelectric crystals.

43. The method of claim 42 further comprising routing the electrical energy to the rechargeable energy storage device.

44. The method of claim 43 further comprising reliquifying excess pressurized vapor.

45. The method of claim 44 wherein the energy storage device is located in an electronic device.

46. The method of claim 45 wherein the electronic device is a notebook computer.

47. A method for extending run-time for a battery-operated notebook computer comprising:

generating heat with a microprocessor;

transferring the heat through a heat sink to continuously produce electrical energy, the heat sink including a pressure plate and one or more piezoelectric crystals, wherein the pressure plate is adapted to contact the one or more piezoelectric crystals when exposed to a sufficiently high vapor pressure; and

providing the electrical energy to a battery in the notebook computer to recharge the battery, wherein run-time of the notebook computer is extended.

48. The method of claim 47 wherein run-time is extended by at least ten percent.

49. The method of claim 47 comprising continuously extending run-time while the battery-operated notebook is turned on.