Micro power generation device and electronic apparatus with the same

Patent metadata

Field	Value
Publication number	US-11539307-B2
Application number	US-202016770208-A
Country	US
Kind code	B2
Filing date	Jan 14, 2020
Priority date	Jan 18, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

The present disclosure proposes a micro power generation device including a plurality of generators stacked one above the other. Each of the plurality of generators includes: an upper electrode and a lower electrode spaced up and down; a spacer provided between peripheral edges of the upper electrode and the lower electrode; an upper friction material layer provided on a side of the upper electrode facing the lower electrode; and a lower friction material layer provided on a side of the lower electrode facing the upper electrode. The upper friction material layer, the lower friction material layer and the spacer together form a cavity. An intermediate spacer is provided between each adjacent two generators, each adjacent two generators and the intermediate spacer together form an intermediate cavity, and the intermediate cavity is filled with gas. A cavity of an upper one of any two adjacent generators communicates with the intermediate cavity between the two adjacent generators.

First claim

What is claimed is:

1. A micro power generation device, comprising a plurality of generators stacked one above the other, wherein each of the plurality of generators comprises:
an upper electrode and a lower electrode spaced up and down;
a peripheral spacer provided between peripheral edges of the upper electrode and the lower electrode;
an upper friction material layer provided on a side of the upper electrode facing the lower electrode; and
a lower friction material layer provided on a side of the lower electrode facing the upper electrode,
wherein the upper friction material layer, the lower friction material layer, and the peripheral spacer together form an internal cavity, and an intermediate spacer is provided between any two adjacent generators among the plurality of generators, wherein any two adjacent generators and the intermediate spacer together form an intermediate cavity, and the intermediate cavity is filled with gas; and the internal cavity of an upper generator of any two adjacent generators is interconnected with the intermediate cavity between the two adjacent generators.

2. The micro power generation device according to claim 1 , wherein the upper generator of any two adjacent generators is provided with a through hole, and the through hole is configured to communicate the internal cavity of the upper generator with the intermediate cavity between the two adjacent generators.

3. The micro power generation device according to claim 2 , wherein an orifice at one end of the through hole is opened on a surface of the lower friction material layer facing the upper friction material layer, and an orifice at the other end of the through hole is opened on a surface of the lower electrode facing the upper electrode of an adjacent generator below the generator.

4. The micro power generation device according to claim 3 , wherein the upper generator of any two adjacent generators is provided with a plurality of through holes.

5. The micro power generation device according to claim 4 , wherein the plurality of through holes are arranged in at least one of the following manners:
the plurality of through holes are arranged in an array; and
the plurality of through holes are evenly arranged.

6. The micro power generating device according to claim 2 , wherein an orifice at one end of the through hole is opened on a side wall of the internal cavity, and an orifice at the other end of the through hole is opened on a side wall of the intermediate cavity.

7. The micro power generation device according to claim 2 , wherein:
the through hole of at least one of the plurality of generators comprises at least one first through hole and at least one second through hole;
an orifice at one end of the first through hole is opened on a surface of the lower friction material layer facing the upper friction material layer, and an orifice at the other end of the first through hole is opened on a surface of the lower electrode facing the upper electrode of an adjacent generator below the generator; and
an orifice at one end of the second through hole is opened on a side wall of the internal cavity, and an orifice at the other end of the second through hole is opened on a side wall of the intermediate cavity.

8. The micro power generation device according to claim 2 , wherein the through hole is a round hole, a square hole, or a polygonal hole.

9. The micro power generation device according to claim 1 , wherein at least one of the upper electrode and the lower electrode is made from indium tin oxide.

10. The micro power generation device according to claim 1 , wherein a material of the upper friction material layer is polydimethylsiloxane, and a material of the lower friction material layer is nylon.

11. The micro power generation device according to claim 1 , wherein a surface of the upper friction material layer of each of the generators facing the lower friction material layer has a micro-nano structure.

12. The micro power generation device according to claim 1 , wherein the gas is an inert gas.

13. The micro power generation device according to claim 1 , wherein the micro power generation device comprises two of the plurality of generators stacked one above the other.

14. An electronic apparatus, comprising:
a power generation device and multiple power consumption devices, wherein the power generation device is a micro power generation device comprising a plurality of generators stacked one above the other, wherein each of the plurality of generators comprises:
an upper electrode and a lower electrode spaced up and down;
a peripheral spacer provided between peripheral edges of the upper electrode and the lower electrode;
an upper friction material layer provided on a side of the upper electrode facing the lower electrode; and
a lower friction material layer provided on a side of the lower electrode facing the upper electrode, wherein the upper friction material layer, the lower friction material layer and the peripheral spacer together form an internal cavity, and an intermediate spacer is provided between any two adjacent generators among the plurality of generators, wherein any two adjacent generators and the intermediate spacer together form an intermediate cavity, and the intermediate cavity is filled with gas; the internal cavity of an upper generator of any two adjacent generators is interconnected with the intermediate cavity between the two adjacent generators; and

multiple power consumption devices, wherein the multiple power consumption devices are electrically connected to multiple ones of the plurality of generators of the micro power generation device, respectively, and the multiple ones of the plurality of generators are configured to supply power to the multiple power consumption devices, respectively.

15. The electronic apparatus according to claim 14 , further comprising a plurality of power supply loops, and the plurality of power supply loops are electrically connected between the multiple generators and the multiple power consumption devices, respectively.

16. The micro power generation device according to claim 1 , wherein a material of the upper friction material layer is nylon, and a material of the lower friction material layer is poly dim ethyl siloxane.

17. The micro power generation device according to claim 1 , wherein a surface of the lower friction material layer of each of the generators facing the upper friction material layer has a micro-nano structure.

18. The micro power generation device according to claim 11 , wherein a surface of the lower friction material layer of each of the generators facing the upper friction material layer has a micro-nano structure.

19. The electronic apparatus according to claim 14 , wherein the upper generator of any two adjacent generators is provided with a through hole, and the through hole is configured to communicate the internal cavity of the upper generator with the intermediate cavity between the two adjacent generators.

20. The electronic apparatus according to claim 19 , wherein an orifice at one end of the through hole is opened on a side wall of the internal cavity, and an orifice at the other end of the through hole is opened on a side wall of the intermediate cavity.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Zhidong
• Zhou Quanguo
• Zhou Lijia
• Lan Ronghua

Classifications

• B81B2201/03

  Microengines and actuators · CPC title

• H02N1/04 Primary

  Friction generators · CPC title

• B81B7/007

  Interconnections between the MEMS and external electrical signals · CPC title

• B81B1/004

  Through-holes, i.e. extending from one face to the other face of the wafer · CPC title