Heat dissipation assembly and electronic device

Patent metadata

Field	Value
Publication number	US-10497641-B2
Application number	US-201816140522-A
Country	US
Kind code	B2
Filing date	Sep 24, 2018
Priority date	Mar 18, 2014
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

The present invention provides a heat dissipation assembly and an electronic device, where the heat dissipation assembly includes: a shielding element, where a via hole is disposed on the shielding element, the shielding element is electrically connected to ground copper of a PCB board, and a heat-generating electronic element is disposed on the PCB board; a heat pipe, located on the via hole, where the heat pipe is electrically connected to the shielding element, and the heat pipe, the PCB board, and the shielding element form an electromagnetic shielding can that is used to accommodate the heat-generating electronic element; and an elastic thermal interface material, disposed between the heat pipe and the heat-generating electronic element and mutually fitted to the heat pipe and the heat-generating electronic element.

First claim

What is claimed is:

1. An electronic device, comprising:
an enclosure; and
a heat dissipation assembly, located in the enclosure, wherein the heat dissipation assembly comprises a shielding element having a via hole, a heat pipe, and a first elastic thermal interface material; and
a thermally conductive support connected to the heat pipe in a lateral direction;
wherein the shielding element is electrically connected to a ground copper of a printed circuit board (PCB),
wherein a heat-generating electronic element is disposed on the PCB,
wherein the heat-generating electronic element is located in a cavity of the shielding element,
wherein the first elastic thermal interface material is fitted onto the heat-generating electronic element through the via hole, and
wherein the heat pipe is located on the first elastic thermal interface material.

2. The electronic device according to claim 1 , wherein the heat pipe is electrically connected to the shielding element by using an electrically conductive elastomer or an electrically conductive interface material.

3. The electronic device according to claim 1 , wherein the heat dissipation assembly further comprises:
a second elastic thermal interface material; and
a thermally conductive metal block, disposed between the second elastic thermal interface material and the PCB, wherein the thermally conductive metal block is connected to the heat-generating electronic element by using a thermally conductive layer of the PCB.

4. The electronic device according to claim 3 , wherein the second elastic thermal interface material is an elastic electrically conductive thermal interface material or an elastic insulated thermal interface material.

5. The electronic device according to claim 1 , wherein the first elastic thermal interface material is an elastic insulated thermal interface material or is an elastic electrically conductive thermal interface material.

6. The electronic device according to claim 1 , wherein further comprises an electrically conductive interface material, disposed around the via hole, and located between the shielding element and the heat pipe.

7. The electronic device according to claim 1 , wherein further comprises an electrically conductive elastomer, the electrically conductive elastomer is disposed around the via hole, and the electrically conductive elastomer is electrically connected to the heat pipe.

8. The electronic device according to claim 1 , wherein heat generated by the heat-generating electronic element is transferred to the first elastic thermal interface material and the heat pipe; and heat on the heat pipe is transferred to the thermally conductive support and spread out.

9. The electronic device according to claim 1 , wherein the electronic device is a mobile phone.

10. An electronic device, comprising:
an enclosure; and
a heat dissipation assembly, located in the enclosure, wherein the heat dissipation assembly comprises a shielding element, a heat pipe, and a first elastic thermal interface material, wherein the shielding element covers a heat-generating electronic element of a print circuit board (PCB), and the shielding element is electrically connected to a ground copper layer of the PCB, the first elastic thermal interface material is located on the shielding element, and the heat pipe is located on the first elastic thermal interface material; and
a thermally conductive support connected to the heat pipe in a lateral direction.

11. The electronic device according to claim 10 , wherein the heat dissipation assembly further comprises:
a thermally conductive metal block, disposed on the PCB, wherein the thermally conductive metal block is connected to the heat-generating electronic element by using a ground copper layer; and
a second elastic thermal interface material, located between the thermally conductive metal block and the heat pipe.

12. The electronic device according to claim 10 , wherein the electronic device is a mobile phone.

13. The electronic device according to claim 3 , wherein the thermally conductive layer of the PCB is a ground copper layer of the PCB.

14. The electronic device according to claim 1 , wherein the heat pipe and the shielding element are electrically connected to each other.

15. The electronic device according to claim 1 , wherein the thermally conductive support is a metal support.

16. The electronic device according to claim 1 , wherein the thermally conductive support is a graphite support.

17. The electronic device according to claim 10 , wherein heat generated by the heat-generating electronic element is transferred to the first elastic thermal interface material and the heat pipe, heat on the heat pipe is transferred to the thermally conductive support and spread out.

Assignees

• Huawei Device Co Ltd

Inventors

• Jin Linfang
• Xiao Yongwang
• Wang Guoping
• Zou Jie
• Li Hualin

Classifications

• H10W42/265

  Shielding wires, e.g. constant potential wires · CPC title

• H10W42/20

  protecting against electromagnetic or particle radiation, e.g. light, X-rays, gamma-rays or electrons · CPC title

• H10W40/258

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

• H10W40/251

  Organics · CPC title

• H10W40/22

  characterised by their shape, e.g. having conical or cylindrical projections · CPC title