Secondary battery

Patent metadata

Field	Value
Publication number	US-9590225-B2
Application number	US-201514721836-A
Country	US
Kind code	B2
Filing date	May 26, 2015
Priority date	Jan 7, 2015
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A secondary battery including: an electrode assembly including an electrode tab; a case accommodating the electrode assembly; and a lead tab forming a coupling portion inside the case together with the electrode tab, the lead tab drawn out to an outside of the case, and the coupling portion includes a first bent portion including a bent end of the electrode tab, and a second bent portion including a bent end of the lead tab coupled to the bent end of the electrode tab.

First claim

What is claimed is:

1. A secondary battery comprising:
an electrode assembly comprising an electrode tab;
a case comprising a pouch-shaped portion accommodating the electrode assembly and a terrace portion having a thickness less than a thickness of the pouch-shaped portion; and
a lead tab forming a coupling portion inside the terrace portion of the case together with the electrode tab, the lead tab drawn out to an outside of the case,
wherein the coupling portion comprises a first bent portion including a bent end of the electrode tab, and a second bent portion including a bent end of the lead tab coupled to the bent end of the electrode tab.

2. The secondary battery of claim 1 , further comprising an insulation tape surrounding an outside of the coupling portion.

3. The secondary battery of claim 1 , wherein the coupling portion comprises a welding portion at which the electrode tab and the lead tab are welded to each other, the welding portion being positioned inside the coupling portion.

4. The secondary battery of claim 1 , wherein the first bent portion and the second bent portion are bent in a U-shaped configuration.

5. A secondary battery comprising:
an electrode assembly comprising an electrode tab;
a case accommodating the electrode assembly; and
a lead tab forming a coupling portion inside the case together with the electrode tab, the lead tab drawn out to an outside of the case,
wherein the coupling portion comprises a first bent portion including a bent end of the electrode tab, and a second bent portion including a bent end of the lead tab coupled to the bent end of the electrode tab, and
wherein the secondary battery further comprises an insulation tape attached to the coupling portion, wherein the insulation tape is bent together with the bent end of the electrode tab and the bent end of the lead tab and positioned at both an outside of the coupling portion and an inside of the coupling portion.

6. A secondary battery comprising:
an electrode assembly comprising an electrode tab;
a case comprising a pouch-shaped portion accommodating the electrode assembly and a terrace portion having a thickness less than a thickness of the pouch-shaped portion; and
a lead tab forming a coupling portion inside the terrace portion of the case together with the electrode tab, the lead tab drawn out to an outside of the case,
wherein the coupling portion comprises an end of the electrode tab and an end of the lead tab that are bent in a wound configuration.

7. The secondary battery of claim 6 , further comprising an insulation tape surrounding an outside of the coupling portion.

8. The secondary battery of claim 6 , wherein the coupling portion comprises a welding portion at which the electrode tab and the lead tab are welded to each other, the welding portion being positioned inside the coupling portion.

9. The secondary battery of claim 6 , wherein the end of the electrode tab and the end of the lead tab are bent more than twice in a folded S-shaped configuration.

10. A secondary battery comprising:
an electrode assembly comprising an electrode tab;
a case accommodating the electrode assembly; and
a lead tab forming a coupling portion inside the case together with the electrode tab, the lead tab drawn out to an outside of the case,
wherein the coupling portion comprises an end of the electrode tab and an end of the lead tab that are bent in a wound configuration, and
wherein the secondary battery further comprises an insulation tape attached to the coupling portion, wherein the insulation tape is wound together with the electrode tab and the lead tab and positioned at both an outside of the coupling portion and an inside of the coupling portion.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Hakkyu

Classifications

• H01M50/528 Primary

  Fixed electrical connections, i.e. not intended for disconnection · CPC title

• H01M50/543 Primary

  Terminals · CPC title

• H01M50/536

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

• H01M50/534

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

• H01M50/54

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