Flexible battery

Patent metadata

Field	Value
Publication number	US-10916745-B2
Application number	US-201514955191-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Aug 5, 2015
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A flexible battery includes a first substrate, a second substrate, and a first unit cell and a second unit cell arranged between the first substrate and the second substrate in lengthwise directions of the first substrate and the second substrate, the first and second unit cells being electrically connected to each other.

First claim

What is claimed is:

1. A flexible battery, comprising:
a first substrate;
a second substrate; and
a first unit cell and a second unit cell arranged between the first substrate and the second substrate in lengthwise directions of the first substrate and the second substrate, the first and second unit cells being electrically connected to each other,
wherein each of the first and second unit cells includes:
a first conductive pattern on the first substrate,
a first active material layer coated on the first conductive pattern,
a second conductive pattern on the second substrate,
a second active material layer coated on the second conductive pattern, and
a separator between the first active material layer and the second active material layer, the first and second active material layers facing each other,

wherein a single end of the first conductive pattern of the first unit cell extends in a direction oriented away from the first substrate,
wherein a single end of the second conductive pattern of the second unit cell extends in a direction oriented away from the second substrate, the extending single ends of the first and second conductive patterns contacting each other and being electrically connected to each other,
wherein the first substrate includes a first dimple overlapping a contact point of the extending single ends of the first and second conductive patterns and having a predetermined depth that is less than a thickness of the first substrate, and
wherein the second substrate includes a second dimple overlapping the contact point of the extending single ends of the first and second conductive patterns having a predetermined depth that is less than a thickness of the second substrate, the first and second dimples overlapping each other and curving toward each other.

2. The flexible battery as claimed in claim 1 , further comprising sealing members along peripheries between the first substrate and the second substrate.

3. The flexible battery as claimed in claim 2 , wherein the sealing members are between the first and second unit cells.

4. The flexible battery as claimed in claim 2 , wherein the sealing members include first and second sealing members on the first and second substrates, respectively, each of the first and second sealing members extends along an entire combined perimeter of the first and second unit cells.

5. The flexible battery as claimed in claim 4 , wherein each of the first and second sealing members has a closed shape, the first and second sealing members being stacked on each other, and the electrically connected ends of the first and second conductive patterns extending between two opposite sides of the closed shape.

6. The flexible battery as claimed in claim 1 , wherein the first and second unit cells are directly electrically connected or indirectly electrically connected via a conductive adhesive layer.

7. The flexible battery as claimed in claim 1 , further comprising electrical connector parts electrically connecting the first conductive pattern of the first unit cell and the second conductive pattern of the second unit cell to each other.

8. The flexible battery as claimed in claim 7 , further comprising sealing members on exterior sides of the electrical connector parts.

9. The flexible battery as claimed in claim 7 , wherein each of the electrical connector parts includes a protrusion on the first conductive pattern or on the second conductive pattern, the protrusions on the first and second conductive patterns facing and contacting each other.

10. The flexible battery as claimed in claim 7 , wherein each of the electrical connector parts includes a conductive adhesive layer between the first conductive pattern and the second conductive pattern.

11. The flexible battery as claimed in claim 1 , wherein the first conductive pattern of the first unit cell has a first side, the second conductive pattern of the second unit cell has a second side, and the first side and the second side are entirely electrically connected to each other.

12. The flexible battery as claimed in claim 1 , wherein the first conductive pattern of the first unit cell has a first side, the second conductive pattern of the second unit cell has a second side, and some regions of the first side and the second side are electrically connected to each other in forms of points.

13. The flexible battery as claimed in claim 1 , further comprising a sealing member between the first and second substrates and surrounding the first and second unit cells, an electrical connection between the first and second unit cells extends between two opposite sides of the sealing member.

14. The flexible battery as claimed in claim 1 , wherein the first and second unit cells have separate electrolytes.

15. The flexible battery as claimed in claim 1 , wherein the first and second unit cells are electrically connected to each other only via the extending single ends of the first and second conductive patterns.

16. The flexible battery as claimed in claim 1 , wherein the separator of the first unit cell is separated from the separator of the second unit cell.

17. The flexible battery as claimed in claim 1 , wherein the extending single ends of the first and second conductive patterns that extend away from the first and second substrates are inside an interior of the flexible battery.

18. The flexible battery as claimed in claim 1 , wherein:
the first and second unit cells have lateral sides facing each other, and
the extending single ends of the first and second conductive patterns that extend away from the first and second substrates extend along the lateral sides of the first and second unit cells and completely overlap the lateral sides of the first and second unit cells.

19. The flexible battery as claimed in claim 1 , wherein the extending single ends of the first and second conductive patterns span the width of the first unit cell to seal an edge of the first unit cell.

20. A flexible battery, comprising:
a first substrate;
a second substrate; and
a first unit cell and a second unit cell arranged between the first substrate and the second substrate in lengthwise directions of the first substrate and the second substrate, the first and second unit cells being electrically connected to each other,
wherein each of the first and second unit cells includes:
a first conductive pattern on the first substrate,
a first active material layer coated on the first conductive pattern,
a second conductive pattern on the second substrate,
a second active material layer coated on the second conductive pattern, and
a separator between the first active material layer and the second active material layer, the first and second active material layers facing each other,

wherein the separator directly contacts and completely covers surfaces of the first active material layer, and the separator exposes at least an edge of the first conductive pattern,
wherein a single end of the first conductive pattern of the first unit cell extends in a direction oriented away from the first substrate and a single end of the second conductive pattern of the second unit cell extends in a direction oriented away from the second substrate, the extending single ends of the first and second conductive patterns contacting each other and being electrically connected to each other,
wherein the first substrate includes a first dimple overlapping a contact point of the extending single ends of the first and second conductive patterns and having a predeter

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Hyunchul

Classifications

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title

• H01M50/533

  characterised by the shape of the leads or tabs · CPC title

• H01M50/186

  characterised by the disposition of the sealing members · CPC title