Secondary battery

Patent metadata

Field	Value
Publication number	US-10490841-B2
Application number	US-201615336737-A
Country	US
Kind code	B2
Filing date	Oct 27, 2016
Priority date	Nov 12, 2015
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A secondary battery includes: a wound electrode assembly including a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate; a pouch accommodating the electrode assembly; and; an adhesive tape on an outer surface of the electrode assembly. The adhesive having adhesiveness through reaction with an electrolyte.

First claim

What is claimed is:

1. A secondary battery comprising:
a wound electrode assembly comprising a first electrode plate, a second electrode plate, and a separator between the first electrode plate and the second electrode plate, the electrode assembly having a first planar portion, a second planar portion, a first round portion, and a second round portion, the first and second round portions extending between the first and second planar portions;
a pouch accommodating the electrode assembly; and
a first adhesive tape and a second adhesive tape on an outer surface at the first planar portion and the second round portion of the electrode assembly and not covering at least one of the second planar portion and the first round portion of the electrode assembly, the first and second adhesive tapes having adhesiveness through reaction with an electrolyte and being separate from each other,
wherein the first adhesive tape extends from a top end of the electrode assembly toward a bottom end of the electrode assembly, and
wherein the second adhesive tape extends from the bottom end of the electrode assembly toward the top end of the electrode assembly.

2. The secondary battery of claim 1 , wherein the first and second adhesive tapes comprise an oriented polystyrene (OPS) film.

3. The secondary battery of claim 1 ,
wherein the first adhesive tape has a length that is one-third of the entire height of the electrode assembly, and
wherein the second adhesive tape has a length that is one-third of the entire height of the electrode assembly.

4. The secondary battery of claim 3 , further comprising a strength reinforcing tape on the electrode assembly between the first adhesive tape and the second adhesive tape,
wherein the strength reinforcing tape comprises a polyimide (P 1 ) film.

5. The secondary battery of claim 1 , wherein areas of each of the first and second planar portions being greater than areas of each of the first and second round portions.

6. The secondary battery of claim 5 , wherein the first and second adhesive tapes are on the first planar portion, the second round portion, and the second planar portion, and
wherein the first round portion is not covered by the first and second adhesive tapes.

7. The secondary battery of claim 5 , wherein the first and second adhesive tapes are on the first round portion and the second round portion, and
wherein at least one of the first planar portion and the second planar portion is not covered by the first and second adhesive tapes.

8. The secondary battery of claim 5 ,
wherein the first and second adhesive tapes are on the first round portion and the second round portion, and
wherein the first and second adhesive tapes extend from the first round portion onto the first planar portion and from the second round portion onto the second planar portion.

9. The secondary battery of claim 5 , wherein the first and second adhesive tapes are on the first round portion, the first planar portion, and the second round portion, and
wherein the second planar portion is not covered by the first and second adhesive tapes.

10. The secondary battery of claim 5 , wherein the first and second adhesive tapes are on the first planar portion, the second planar portion, the first round portion, and the second round portion.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Cho Kyunghoon
• Lee Jeawoan
• Lim Youngchang
• Eo Soomi
• Park Seunghee
• Lim Jaemin
• Kim Kwonchul
• Jung Euysun
• Kim Kyung

Classifications

• H01M10/0431 Primary

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

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/02

  Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title

• H01M2200/00

  Safety devices for primary or secondary batteries · CPC title