Rechargeable battery

Patent metadata

Field	Value
Publication number	US-11189889-B2
Application number	US-201716319206-A
Country	US
Kind code	B2
Filing date	Aug 11, 2017
Priority date	Aug 11, 2016
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

The present disclosure relates to a rechargeable battery including a cell assembly including a plurality of unit cells disposed to be separated by a predetermined interval, a casing member receiving the cell assembly, a first connection part connecting the plurality of unit cells, and a second connection part disposed parallel to the first connection part and connecting the plurality of unit cells, wherein each of the plurality of unit cells includes a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode.

First claim

The invention claimed is:

1. A rechargeable battery comprising:
a cell assembly including a plurality of unit cells spaced apart from one another along a lengthwise direction;
a casing member receiving the cell assembly;
a first connection part connecting the plurality of unit cells; and
a second connection part disposed parallel to the first connection part and connecting the plurality of unit cells,
wherein each of the plurality of unit cells includes a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode and spiral-wound with the first electrode and the second electrode, and the unit cells are spiral-wound about a same shared axis extending in the lengthwise direction, and
the separator included in each of the plurality of unit cells is configured as a single separator included in all of the plurality of unit cells.

2. The rechargeable battery of claim 1 , wherein
the first connection part electrically connects the first electrode included in each of the plurality of unit cells to configure a first electrode tab.

3. The rechargeable battery of claim 2 , wherein
the second connection part electrically connects the second electrode in each of the plurality of unit cells to configure a second electrode tab.

4. The rechargeable battery of claim 1 , wherein
the first connection part is configured as a single connection part.

5. The rechargeable battery of claim 1 , wherein
the second connection part is configured as a single connection part.

6. The rechargeable battery of claim 1 , wherein
the casing member is configured as a single casing.

7. The rechargeable battery of claim 1 , wherein
the first electrode includes a first coated region and a first uncoated region, and
the first connection part is connected to the first uncoated region.

8. The rechargeable battery of claim 1 , wherein
the second electrode includes a second coated region and a second uncoated region, and
the second connection part is connected to the second uncoated region.

9. The rechargeable battery of claim 1 , wherein
the first connection part includes:
a first region enclosed by the casing member and exposed between the plurality of unit cells; and
a second region exposed in one end of the cell assembly without being enclosed by the casing member.

10. The rechargeable battery of claim 9 , wherein
the second connection part includes:
a third region enclosed by the casing member and exposed between the plurality of unit cells; and
a fourth region exposed in one end of the cell assembly without being enclosed by the casing member.

11. The rechargeable battery of claim 10 , wherein
the cell assembly includes an insulating member disposed at a partial region where the plurality of unit cells are respectively adjacent to each other and where the first region and the third region face each other.

12. The rechargeable battery of claim 1 , wherein
the first connection part and the second connection part are disposed to face to each other and are spiral-wound at one side of the plurality of unit cells.

13. The rechargeable battery of claim 12 , wherein,
in the cell assembly,
the plurality of unit cells are spiral-wound in one direction with respect to the first connection part and the second connection part.

14. The rechargeable battery of claim 1 , wherein
the first connection part is disposed at one side of the plurality of unit cells, and the second connection part is disposed at the other side of the plurality of unit cells parallel in a diagonal direction on a cross-section perpendicular to the first connection part to be spiral-wound.

15. The rechargeable battery of claim 14 , wherein
in the cell assembly, the plurality of unit cells are spiral-wound in one direction based on one of the first connection part and the second connection part.

Assignees

• Samsung Sdi Co Ltd
• Ulsan Nat Inst Science & Tech Unist

Inventors

• Han Da-Un
• Park Minjoon
• Cho Jaephil
• Cha Hyungyeon

Classifications

• H01M10/0587 Primary

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

• H01M50/534

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

• H01M50/516

  by welding, soldering or brazing · CPC title

• H01M50/538 Primary

  Connection of several leads or tabs of wound or folded electrode stacks · CPC title

• H01M50/264 Primary

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title