Electrode assembly and rechargeable battery having electrode tab

Patent metadata

Field	Value
Publication number	US-9825274-B2
Application number	US-201514969823-A
Country	US
Kind code	B2
Filing date	Dec 15, 2015
Priority date	Jan 28, 2015
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

An electrode assembly and a rechargeable battery having electrode tab are disclosed. In one aspect, the electrode assembly includes a first electrode and a second electrode which are wound with a separator placed therebetween The first electrode includes a first coated portion coated with an active material and a plurality of first electrode tabs T 1 −Tn protruding outwardly from the first coated portion, wherein n is a natural number greater than 1. The first electrode, when spread in a plane form, includes first to nth portions on which the first electrode tabs T 1 −Tn are respectively formed, wherein the first and nth portions of the first electrode respectively define the innermost and outermost portions thereof. Each of the first electrode tabs T 1 −Tn includes at least one tab, and wherein the number of the first electrode tab Tn is different from the number of each of the first electrode tabs T 1 −Tn−1.

First claim

What is claimed is:

1. An electrode assembly for a secondary battery, comprising:
a first electrode and a second electrode which are wound with a separator placed therebetween,
wherein the first electrode includes a first coated portion coated with an active material and a plurality of first electrode tabs T 1 −Tn protruding outwardly from the first coated portion, wherein n is a natural number greater than 2,
wherein the first electrode, when spread in a plane form, includes first to nth portions on which the first electrode tabs T 1 −Tn are respectively formed, wherein the first and nth portions of the first electrode respectively define innermost and outermost portions thereof, wherein each of the first electrode tabs T 1 −Tn includes at least one tab, and wherein the number of the first electrode tab Tn is different from the number of each of the first electrode tabs T 1 −Tn−1.

2. The electrode assembly of claim 1 , wherein the first electrode tab Tn includes a plurality of tabs spaced apart from each other in a lateral direction, and wherein each of the electrode tabs T 1 −Tn−1 includes a single tab.

3. The electrode assembly of claim 2 , wherein the tabs of the first electrode tab Tn do not overlap each other.

4. The electrode assembly of claim 3 , wherein the tabs of the first electrode tab Tn are connected to the first electrode tab Tn−1 placed at a second outermost portion of the first electrode.

5. The electrode assembly of claim 3 , wherein the distance between the tabs of the first electrode tab Tn is in the range of about 0.5 mm to about 5 mm.

6. The electrode assembly of claim 2 , wherein each of the tabs of the first electrode tab Tn has a smaller width than the tab each of the other first electrode tabs T 1 −Tn−1.

7. The electrode assembly of claim 2 , wherein the width of each of the first electrode tabs T 1 −Tn−1 is about 1.5 times to about 2.5 times the width of each of the tabs of the electrode tab Tn.

8. The electrode assembly of claim 1 , wherein each of the first electrode tabs T 1 −Tn−1 includes a plurality of tabs spaced apart from each other in a lateral direction, and wherein the first electrode tab Tn includes a single tab.

9. The electrode assembly of claim 8 , wherein the distance between the tabs of each of the first electrode tabs T 1 −Tn−1 is in the range of about 0.5 mm to about 5 mm.

10. The electrode assembly of claim 8 , wherein the tab of the first electrode tab Tn has a greater width than each of the tabs of the other first electrode tabs T 1 −Tn−1.

11. The electrode assembly of claim 8 , wherein the width of the tab of the first electrode tab Tn is about 1.5 times to about 2.5 times the width of each of the tabs of the electrode tabs T 1 −Tn−1.

12. A rechargeable battery, comprising:
an electrode assembly including a first electrode and a second electrode that are wound with a separator placed therebetween;
a case containing the electrode assembly; and
a cap plate connected to the case,
wherein the first electrode includes a first coated portion coated with an active material and a plurality of first electrode tabs T 1 −Tn protruding outwardly from the first coated portion, wherein n is a natural number greater than 2,
wherein the first electrode, when spread in a plane form, includes first to nth portions on which the first electrode tabs T 1 −Tn are respectively formed, wherein the first and nth portions of the first electrode respectively define innermost and outermost portions thereof, wherein each of the first electrode tabs T 1 −Tn includes at least one tab, and wherein the number of the first electrode tab Tn is different from the number of each of the first electrode tabs T 1 −Tn−1.

13. The rechargeable battery of claim 12 , wherein the first electrode tab Tn includes a plurality of tabs spaced apart from each other in a lateral direction, and wherein each of the first electrode tabs T 1 −Tn−1 includes a single tab.

14. The rechargeable battery of claim 13 , wherein the tabs of the first electrode tab Tn do not overlap each other.

15. The rechargeable battery of claim 14 , wherein the tabs of the first electrode tab Tn are connected to the tab of the first electrode tab Tn−1 placed at a second outermost portion of the first electrode.

16. The rechargeable battery of claim 15 , wherein the distance between the tabs of the first electrode tab Tn is in the range of about 0.5 mm to about 5 mm.

17. The rechargeable battery of claim 13 , wherein each of the tabs of the first electrode tab Tn has a smaller width than the tab of each of the first electrode tabs T 1 −Tn−1.

18. The rechargeable battery of claim 12 , wherein each of the first electrode tabs T 1 −Tn−1 includes a plurality of tabs spaced apart from each other in a lateral direction, and wherein the first electrode tab Tn includes a single tab.

19. The rechargeable battery of claim 18 , wherein the tab of the first electrode tab Tn has a greater width than each of the tabs of the first electrode tabs T 1 −Tn−1.

20. The rechargeable battery of claim 18 , wherein the width of the tab of the first electrode tab Tn is greater than the sum of the widths of the tabs of each of the first electrode tabs T 1 −Tn−1.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Yu-Na
• Yoon Jang-Ho

Classifications

• H01M10/0431 Primary

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title

• H01M50/533

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

• H01M50/538 Primary

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

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/536

  characterised by the method of fixing the leads to the electrodes, e.g. by welding · CPC title