Metal-air battery having cylindrical structure

Patent metadata

Field	Value
Publication number	US-11108104-B2
Application number	US-201916679844-A
Country	US
Kind code	B2
Filing date	Nov 11, 2019
Priority date	Sep 30, 2016
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

A metal-air battery includes a unit cell wound into a roll. The unit cell includes a negative-electrode metal layer having a first surface located in a circumferential direction of the roll and a second surface facing the first surface and located in the circumferential direction of the roll; a first electrolyte film and a first positive-electrode layer sequentially disposed on the first surface of the negative-electrode metal layer; and a second electrolyte film and a second positive-electrode layer sequentially disposed on the second surface of the negative-electrode metal layer. The unit cell is wound in a way such that the first positive-electrode layer and the second positive-electrode layer face each other.

First claim

What is claimed is:

1. A metal-air battery comprising a unit cell wound into a roll,
wherein the unit cell comprises:
a negative-electrode metal layer having a first surface located in a circumferential direction of the roll, a second surface facing the first surface and located in the circumferential direction of the roll, a third surface between the first surface and the second surface, and a fourth surface facing the third surface;
a first electrolyte film and a first positive-electrode layer sequentially disposed on the first surface of the negative-electrode metal layer;
a second electrolyte film and a second positive-electrode layer sequentially disposed on the second surface of the negative-electrode metal layer;
a first sealing material which seals the third surface of the negative-electrode metal layer; and
a second sealing material which seals the fourth surface of the negative-electrode metal layer,
wherein the unit cell is wound into a roll in a way such that the first positive-electrode layer and the second positive-electrode layer face each other, and the first and second sealing materials extend in an axial direction of the roll.

2. The metal-air battery of claim 1 , wherein the first electrolyte film and the second electrolyte film are spaced apart from each other, and
wherein the first positive-electrode layer and the second positive-electrode layer are spaced apart from each other.

3. The metal-air battery of claim 1 , wherein the unit cell further comprises:
a first separation film disposed between the first electrolyte film and the first positive-electrode layer; and
a second separation film disposed between the second electrolyte film and the second positive-electrode layer,
wherein the first separation film and the second separation film are spaced apart from each other.

4. The metal-air battery of claim 1 , wherein the unit cell further comprises a negative-electrode current collector extended through the second sealing material and connected to the fourth surface of the negative-electrode metal layer.

5. The metal-air battery of claim 1 , wherein the unit cell is wound in the way such that the third surface of the negative-electrode metal layer is located at a center of the roll and the fourth surface of the negative-electrode metal layer is located at an outermost part of the roll.

6. The metal-air battery of claim 1 , wherein the first positive-electrode layer and the second positive-electrode layer extend beyond the third and fourth surfaces of the negative-electrode metal layer.

7. The metal-air battery of claim 6 , wherein the first separation film and the second separation film extend beyond the third and fourth surfaces of the negative-electrode metal layer.

8. The metal-air battery of claim 1 , wherein the unit cell further comprises:
a first gas-diffusion layer disposed on the first positive-electrode layer; and
a second gas-diffusion layer disposed on the second positive-electrode layer,
wherein the first gas-diffusion layer and the second gas-diffusion layer are spaced apart from each other, and
the unit cell is wound in the way such that the first gas-diffusion layer and the second gas-diffusion layer face each other.

9. The metal-air battery of claim 8 , wherein the first gas-diffusion layer and the second gas-diffusion layer extend beyond the third and fourth surfaces of the negative-electrode metal layer.

10. The metal-air battery of claim 1 , wherein
the first positive-electrode layer comprises a plurality of first positive-electrode plates arranged in the circumferential direction of the roll, wherein a first gap is defined between each two adjacent first positive-electrode plates,
the second positive-electrode layer comprises a plurality of second positive-electrode plates arranged in the circumferential direction of the roll, wherein a second gap is defined between each two adjacent second positive-electrode plates,
wherein the roll is wound in the way such that the second positive-electrode plates connect the two adjacent first positive-electrode plates across the first gap.

11. The metal-air battery of claim 1 , wherein
the metal-air battery comprises a plurality of unit cells wound into the roll,
wherein the plurality of unit cells are stacked in a way such that central axes of the roll do not coincide with one another and outer circumference surfaces of the roll are in contact with one another.

12. The metal-air battery of claim 1 , wherein
the metal-air battery comprises a plurality of unit cells wound into the roll,
wherein the plurality of unit cells are stacked in a way such that central axes of the roll coincide with one another.

13. A metal-air battery comprising:
a first cylindrical part and a second cylindrical part arranged in a concentric form to share a central axis,
wherein the second cylindrical part surrounds the first cylindrical part,
wherein the first cylindrical part comprises a first unit cell,
wherein the second cylindrical part comprises a plurality of second unit cells arranged in the circumferential direction, and each of the second unit cells of the second cylindrical part has an arc shape,
wherein each of the second unit cells of the second cylindrical part comprises:
a first negative-electrode metal layer having a first surface located in a circumferential direction, a second surface facing the first surface and located in the circumferential direction, a third surface between the first surface and the second surface and located in a radial direction, and a fourth surface facing the third surface and located in the radial direction;
a first electrolyte film and a first positive-electrode layer sequentially disposed on the first surface of the first negative-electrode metal layer; and
a second electrolyte film and a second positive-electrode layer sequentially disposed on the second surface of the first negative-electrode metal layer.

14. The metal-air battery of claim 13 , wherein the first unit cell of the first cylindrical part comprises:
a second negative-electrode metal layer having a first surface located in a circumferential direction, and a second surface facing the first surface and located in the circumferential direction;
a third electrolyte film and a third positive-electrode layer sequentially disposed on the first surface of the second negative-electrode metal layer; and
a fourth electrolyte film and a fourth positive-electrode layer sequentially disposed on the second surface of the second negative-electrode metal layer.

15. The metal-air battery of claim 14 , wherein
the first unit cell of the first cylindrical part has a cylindrical shape,
the fourth positive-electrode layer, the fourth electrolyte film, the negative-electrode metal layer, the third electrolyte film and the third positive-electrode layer of the first unit cell of the first cylindrical part are arranged in a concentric form.

16. The metal-air battery of claim 15 , wherein, in the first unit cell of the first cylindrical part,
the fourth electrolyte film is disposed to surround the fourth positive-electrode layer,
the second negative-electrode metal layer is disposed to surround the fourth electrolyte film,
the third electrolyte film is disposed to surround the second negative-electrode metal layer, and
the third positive-electrode layer is disposed to surround the third electrolyte film.

17. The metal-air battery of claim 13 , wherein
the first positive-electrode layer and the second positive-electrode layer extend in a radial direction such that the first positive

Assignees

• Samsung Electronics Co Ltd

Inventors

• Choi Wonsung
• Choi Kyounghwan
• Kwon Hyukjae
• Kim Taeyoung
• Lee Heungchan

Classifications

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/1385

  Hybrid cells · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title