SEMICONDUCTOR THERMOELECTRIC MODULE CHARGER FOR MOBILE COMPUTING DEVICE

• US 20140176041A1
• Filed: 12/20/2012
• Published: 06/26/2014
• Est. Priority Date: 12/20/2012
• Status: Abandoned Application

• Current Assignee: NVIDIA Corporation
• Original Assignee: NVIDIA Corporation
• Inventors: Sun, Xiang
• Application Number:
  US13/722,387
• Publication Number:
  US 20140176041A1
• Time in Patent Office: Days
• US Class Current: 320/101
• CPC Class Codes: G06F 1/32 Means for saving power
• CPC Class Codes: H02J 50/001 Energy harvesting or scavenging
• 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: H10N 10/13 characterised by the heat-exchanging means at the junction

Abstract

A system and method for recycling the electrical energy that has been consumed and converted into unwanted thermal energy. A power source for supplying power to a mobile computing system comprises a rechargeable battery and a semiconductor thermoelectric module coupled to the rechargeable battery and a charring circuit. The thermoelectric module is disposed proximate to a heat generating member of the computing system and operable to sense the thermal energy released by the member and convert it into electrical energy based on Seeback effect. The converted electrical energy can be regulated and stored in the rechargeable battery.

Claims

1. A computing system comprising:

a first component operable to generate thermal energy during operation hereof;

a battery system comprising a thermoelectric module operable to sense the thermal energy generated by said first component, and further operable to convert said thermal energy generated by said first component into converted electrical energy.

2. The computing system as described in claim 1, wherein said battery system further comprises:

a rechargeable battery coupled with said thermoelectric module and operable to supply power to the first component; and

a charging circuit coupled with said rechargeable battery, and

wherein said thermoelectric module is operable to output said converted electrical energy as converted current and charge said rechargeable battery with said converted current through said charging circuit.

3. The computing system as described in claim 2, wherein said battery system further comprises a control circuit that is operable to:

activate charging said rechargeable battery by said thermoelectric module when said converted electrical energy is above a threshold value; and

deactivate the charging said rechargeable battery by said thermoelectric module when said rechargeable battery is determined to be sufficiently charged.

4. The computing system as described in claim 2 further comprising a second component, said second component maintaining a lower temperature than said first component during said operation of said first component;

and wherein further said thermoelectric module is disposed proximate to said second component.

5. The computing system as described in claim 4, wherein an amount of said converted current is proportional to a temperature difference between said first component and said second component.

6. The computing system as described in claim 5, wherein said first component comprises a core chip, and wherein said second component is an exterior housing of the computing system.

7. The computing system as described in claim 2, wherein said first component is said rechargeable battery.

8. The computing system as described in claim 1, wherein said thermoelectric module is disposed proximate to said first component.

9. The computing system as described in claim 1, wherein said thermoelectric module is configured as an exterior housing of the computing system.

10. The computing system as described in claim 1, wherein said thermoelectric module comprises at least one thermal electrical material selected from a group consisting of Bi₂Te₃, Bi₂Se₃, PbTe and alloys thereof.

11. The computing system as described in claim 1, wherein said thermoelectric module is operable to convert said thermal energy into said converted electrical energy at a rate independent of an accumulative operating time of the battery system.

12. A power source for supplying power to a mobile computing system, said power source comprising:

a rechargeable battery;

an internal charging circuit;

a thermoelectric battery, coupled to said rechargeable battery, having a first surface and a second surface, and operable to;

sense a temperature difference between said first surface and said second surface;

generate electrical energy responsive to said temperature difference; and

charge said rechargeable battery with said electrical energy through said internal charging circuit.

13. The power source as described in claim 12, wherein said thermoelectric battery comprises at least one thermal electrical material selected from a group consisting of Bi₂Te₃, Bi₂Se₃, PbTe and alloys thereof;

and wherein said rechargeable battery is a Li-ion polymer battery.

14. The power source as described in claim 12, wherein said temperature difference is caused by an operation of said mobile computing system.

15. The power source as described in claim 12, wherein said first surface of said thermoelectric battery is disposed proximate to a core chip of said mobile computing system.

16. The power source as described in claim 12, wherein said first surface of said thermoelectric battery is disposed proximate to said rechargeable battery;

and wherein said second surface of said thermoelectric battery is disposed proximate to an exterior housing of said mobile computing system.

17. The power source as described in claim 12, wherein said internal charging circuit comprises charging control logic operable to:

activate charging said rechargeable battery with said electrical energy when said temperature difference is above a threshold value; and

deactivate said charging said rechargeable battery with said electrical energy when said rechargeable battery is determined to be sufficiently charged.

18. A method for supplying power to a mobile computing system, said method comprising:

sensing thermal energy generated by operation of said mobile computing system;

converting said thermal energy into an electrical current; and

charging a rechargeable battery with said electrical current, wherein said rechargeable battery is operable to supply power demanded by said mobile computing system.

19. The method as described in claim 18, wherein said converting said thermal energy into electrical current comprises:

creating a voltage difference between a first area and a second area of a thermoelectric module; and

producing said electrical current in response to said voltage difference.

20. The method as described in claim 19 further comprising:

activating said charging said rechargeable battery with said electrical current when said voltage difference is above a threshold value; and

deactivating said charging said rechargeable battery with said electrical current when said rechargeable battery is determined to be fully charged.

21. The method as described in claim 18, wherein said sensing thermal energy generated by operation of said mobile computing system comprises sensing thermal energy through thermal conduction.