Secondary battery

Patent metadata

Field	Value
Publication number	US-2017018756-A1
Application number	US-201615204882-A
Country	US
Kind code	A1
Filing date	Jul 7, 2016
Priority date	Jul 16, 2015
Publication date	Jan 19, 2017
Grant date	—

Abstract

A secondary battery includes: an electrode assembly; a case accommodating the electrode assembly; an electrode tab extending from the electrode assembly; a sealing part for insulating the electrode tab from the case; and an insulation film around the electrode tab and between the sealing part and the electrode assembly.

First claim

What is claimed is:

1 . A secondary battery comprising:
an electrode assembly; a case accommodating the electrode assembly; an electrode tab extending from the electrode assembly; a sealing part for insulating the electrode tab from the case; and an insulation film around the electrode tab and between the sealing part and the electrode assembly.

2 . The secondary battery of claim 1 , wherein the insulation film extends into the electrode assembly through an end of the electrode assembly along a length direction of the electrode tab.

3 . The secondary battery of claim 1 , wherein the insulation film comprises a recessed portion facing the electrode assembly that is inwardly recessed with respect to a width direction of the insulation film.

4 . The secondary battery of claim 3 , wherein the recessed portion is gradually recessed in the width direction of the insulation film.

5 . The secondary battery of claim 3 , wherein the recessed portion is recessed in a stepped shape in the width direction of the insulation film.

6 . The secondary battery of claim 3 , wherein the insulation film comprises recessed portions at both sides of the insulation film in the width direction of the insulation film.

7 . The secondary battery of claim 3 , wherein the electrode tab is at a winding center region of the electrode assembly.

8 . The secondary battery of claim 7 , wherein the insulation film comprises recessed portions at both sides of the insulation film next to an end of the winding center region.

9 . The secondary battery of claim 1 , wherein the insulation film is integral with the sealing part and extends from the sealing part.

10 . The secondary battery of claim 1 , wherein the electrode tab comprises a first electrode tab and a second electrode tab having different polarities.

11 . The secondary battery of claim 10 , wherein the first electrode tab comprises nickel or copper,
wherein the case comprises a thin aluminum plate, and wherein the insulation film is around the first electrode tab.

12 . The secondary battery of claim 10 , wherein the first and second electrode tabs are at a winding center region of the electrode assembly, and are spaced from each other.

13 . The secondary battery of claim 10 , wherein the sealing part comprises a one-piece sealing part that insulates the first and second electrode tabs.

14 . The secondary battery of claim 10 , wherein the insulation film comprises a first insulation film and a second insulation film that are respectively around the first and second electrode tabs, and that are integrally formed with each other.

15 . The secondary battery of claim 14 , wherein the insulation film is integral with the sealing part and extends from the sealing part.

16 . The secondary battery of claim 14 , wherein the first and second insulation films comprise recessed portions at ends of the first and second insulation films facing the electrode assembly that are inwardly recessed in a width direction of the first and second insulation films.

17 . The secondary battery of claim 16 , wherein the recessed portions are at both sides of each of the first and second insulation films in the width direction of the first and second insulation films.

18 . The secondary battery of claim 16 , wherein the recessed portions are at sides of the first and second insulation films next to ends of a winding center region of the electrode assembly.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Taegon
• Kim Andrew
• Yun Youngkwang
• Kim Joonsup
• Kim Jaehyung
• Kim Hoseong
• Ham Kichul
• Lee Minhee
• Ro Daesung
• Ha Jaehee
• Lee Junhyung
• Kang Jungmin
• Lim Junggun
• Kyoung Jaehee
• Kim Jinwoo

Classifications

• H01M10/0431 Primary

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

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M50/186

  characterised by the disposition of the sealing members · CPC title

• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M50/55

  on the same side of the cell · CPC title