Heat sink with carbon-nanostructure-based fibres

Patent metadata

Field	Value
Publication number	US-11906254-B2
Application number	US-201917290830-A
Country	US
Kind code	B2
Filing date	Oct 14, 2019
Priority date	Nov 5, 2018
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

The invention relates to a heat sink ( 1 ) having a main body ( 2 ) and a plurality of carbon-nanostructure-based fibres (CNB, 3 ), more particularly carbon nano tubes (CNT, 4 ) or graphene fibres, of which at least some are attached to the main body ( 2 ). According to the invention, the fibres ( 3, 4 ), by adhering to or supporting one another, form a volume structure ( 12 ), more particularly in the manner of cotton wool, felt or a spun yarn, or the fibres ( 3, 4 ) form loops ( 6 ) or a three-dimensional woven fabric.

First claim

The invention claimed is:

1. A heat sink ( 1 ) comprising:
a main body ( 2 );
a plurality of carbon nanostructure-based fibers (CNB, 3 ) of which at least some are secured to the main body ( 2 ) for heat transfer;
a counterbody ( 8 ) which is a distance away from the main body ( 2 ) and has at least some of the fibers ( 3 ) secured thereto; and
at least one support structure ( 14 , 15 ) which supports the fibers ( 3 , 4 );
wherein the at least one support structure ( 14 , 15 ) is grid-shaped and assists the securing to the main body ( 2 ) and/or the counterbody ( 8 ), and
wherein, due to mutual adhesion or support the fibers ( 3 ) form a volume structure ( 12 ), or wherein the fibers ( 3 ) form loops ( 6 ) or a three-dimensional fabric.

2. The heat sink as claimed in claim 1 , wherein the fibers ( 3 ) at least in regions form an ordered structure and/or at least in regions form an unordered structure.

3. The heat sink as claimed in claim 1 , wherein the securing to the main body ( 2 ) and/or to the counterbody ( 8 ) is in the form of adhesive bonding sites and/or casting sites.

4. The heat sink as claimed in claim 1 , wherein the loops ( 6 ) comprise end regions ( 7 , 9 ) and in that at least some of the end regions ( 7 , 9 ) of the loops ( 6 ) are secured to and/or in the main body ( 2 ) and/or the counterbody ( 8 ).

5. The heat sink as claimed in claim 1 , wherein at least some of the fibers ( 3 ) are provided with a mechanically stabilizing coating.

6. The heat sink as claimed in claim 1 , wherein at least some of the fibers ( 3 ) extend from a sheetlike fiber basis ( 11 , 13 ) formed by the fibers ( 3 ) and/or further carbon nanostructure-based fibers (CNB, 3 ).

7. The heat sink as claimed in claim 6 , wherein the fiber basis ( 11 , 13 ) is secured to/in the main body ( 2 ) and/or the counterbody ( 8 ).

8. The heat sink as claimed in claim 6 , wherein the fiber basis ( 11 , 13 ) is in the form of a fabric.

9. The heat sink as claimed in claim 1 , wherein at least some of the fibers ( 3 ) extend from the main body ( 2 ) to the counterbody ( 8 ) at an angle not equal to 90°.

10. The heat sink as claimed in claim 1 , wherein the plurality of carbon nanostructure-based fibers (CNB, 3 ) are carbon nanotubes (CNT, 4 ) or graphene fibers.

11. The heat sink as claimed in claim 1 , wherein the volume structure ( 12 ) is in the form of wadding, felt or yarn.

12. The heat sink as claimed in claim 1 , wherein the at least one support structure ( 14 , 15 ) is made of metal and/or of further carbon nanostructure-based fibers (CNB, 3 ).

13. The heat sink as claimed in claim 12 , wherein the at least one support structure ( 14 , 15 ) is made of further carbon nanostructure-based fibers (CNB, 3 ) in the form of carbon nanotubes (CNT, 4 ) or graphene fibers.

14. The heat sink as claimed in claim 1 , wherein the at least one support structure ( 14 , 15 ) is cast into the main body ( 2 ) and/or the counterbody ( 8 ).

15. The heat sink as claimed in claim 6 , wherein the sheetlike fiber basis ( 11 , 13 ) is formed by further carbon nanostructure-based fibers (CNB, 3 ) in the form of carbon nanotubes (CNT, 4 ) or graphene fibers.

16. The heat sink as claimed in claim 1 , wherein at least some of the fibers ( 3 ) extend from the main body ( 2 ) to the counterbody ( 8 ) at an angle of 90°.

17. A heat sink ( 1 ) comprising:
a main body ( 2 ); and
a plurality of carbon nanostructure-based fibers (CNB, 3 ) of which at least some are secured to the main body ( 2 ) for heat transfer;
wherein at least some of the fibers ( 3 ) extend from a sheetlike fiber basis ( 11 , 13 ) formed by the fibers ( 3 ) and/or further carbon nanostructure-based fibers (CNB, 3 );
wherein the fiber basis ( 11 , 13 ) is in the form of a fabric; and
wherein due to mutual adhesion or support the fibers ( 3 ) form a volume structure ( 12 ), or wherein the fibers ( 3 ) form loops ( 6 ) or a three-dimensional fabric.

18. A heat sink ( 1 ) comprising:
a main body ( 2 );
a plurality of carbon nanostructure-based fibers (CNB, 3 ) of which at least some are secured to the main body ( 2 ) for heat transfer; and
at least one support structure ( 14 , 15 ) which supports the fibers ( 3 , 4 );
wherein the at least one support structure ( 14 , 15 ) is made of metal and/or of further carbon nanostructure-based fibers (CNB, 3 ); and
wherein due to mutual adhesion or support the fibers ( 3 ) form a volume structure ( 12 ), or wherein the fibers ( 3 ) form loops ( 6 ) or a three-dimensional fabric.

19. The heat sink as claimed in claim 18 , wherein the at least one support structure ( 14 , 15 ) is made of further carbon nanostructure-based fibers (CNB, 3 ) in the form of carbon nanotubes (CNT, 4 ) or graphene fibers.

Assignees

• Bosch Gmbh Robert

Inventors

• Arenz Christine
• Buttice Giuseppe
• Ramsayer Reiner
• Groeger Ulrike

Classifications

• H10W40/257

  having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh or porous structures (H10W40/254, H10W40/251 take precedence) · CPC title

• H10W40/47

  by flowing liquids, e.g. forced water cooling · CPC title

• H10W40/70

  Fillings or auxiliary members in containers or in encapsulations for thermal protection or control · CPC title

• H10W40/258

  Metallic materials (H10W40/254, H10W40/257, H10W40/255, H10W40/251, H10W40/253 take precedence) · CPC title

• H10W40/25 Primary

  characterised by their materials · CPC title