Secondary battery

Patent metadata

Field	Value
Publication number	US-9379371-B2
Application number	US-95585010-A
Country	US
Kind code	B2
Filing date	Nov 29, 2010
Priority date	Dec 1, 2009
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

A secondary battery including: an electrode assembly including a plurality of first and second electrode plates, and a plurality of separators between the first and second electrode plates; a first electrode tab on the first electrode plate, and a second electrode tab on the second electrode plate; a case housing the electrode assembly, and the first and second electrode tabs; and first and second external lead terminals at an outer side of the case and electrically coupled to the first and second electrode tabs, respectively.

First claim

What is claimed is:

1. A secondary battery comprising:
an electrode assembly comprising at least one first electrode plate, at least one second electrode plate, and at least one separator between the first and second electrode plates;
a first electrode tab connected to the first electrode plate, and a second electrode tab connected to the second electrode plate;
a case housing the electrode assembly, and the first and second electrode tabs, the case having an outer surface and a plurality of through-holes;
first and second external lead terminals located on an outer side of the case and electrically coupled to the first and second electrode tabs, respectively; and
first and second internal lead terminals within the case and directly contacting the first and second external lead terminals, respectively,
wherein the first internal lead terminal and the first external lead terminal are fused together as a single integral component and wherein the second internal lead terminal and the second external lead terminal are fused together as a single integral component such that a portion of at least the first internal or external terminal is within a first one of the through-holes and a portion of at least the second internal or external terminal is within a second one of the through-holes.

2. The secondary battery as claimed in claim 1 , wherein the first and second external lead terminals are encompassed by the case.

3. The secondary battery as claimed in claim 1 , wherein the first and second external lead terminals are encompassed by sealing portions of the case.

4. The secondary battery as claimed in claim 1 , wherein sealing portions of the case are folded to encompass the first and second external lead terminals.

5. The secondary battery as claimed in claim 1 , wherein sealing portions of the case are folded to encompasses the first and second external lead terminals, and the first and second external lead terminals are oriented in parallel with surfaces of the case.

6. The secondary battery as claimed in claim 1 , wherein the first and second external lead terminals are coupled to the first and second electrode tabs, respectively, through a respective one of the through holes.

7. The secondary battery as claimed in claim 1 , wherein the first and second internal lead terminals are located between the first and second electrode tabs, and the first and second external lead terminals, respectively.

8. The secondary battery as claimed in claim 1 , wherein the first and second internal lead terminals are located between the first and second electrode tabs, and the case, respectively.

9. The secondary battery as claimed in claim 1 , wherein the first and second external lead terminals are electrically coupled to the first and second internal lead terminals.

10. The secondary battery as claimed in claim 7 , further comprising insulating layers between the case, and the first and second internal lead terminals, respectively.

11. The secondary battery as claimed in claim 1 , wherein the electrode assembly is stacked, wherein the plurality of first electrode plates, the plurality of separators, and the plurality of second electrode plates are sequentially stacked.

12. The secondary batter as claimed in claim 1 , wherein the electrode assembly is a jelly roll electrode assembly in which the plurality of first electrode plates, the plurality of separators, and the plurality of second electrode plates are sequentially stacked and wound.

13. The secondary battery as claimed in claim 1 , wherein the first and second electrode tabs are attached to the first and second electrode plates, respectively, at opposite sides of the electrode assembly.

14. The secondary battery as claimed in claim 1 , wherein the case is a pouch.

15. The secondary battery as claimed in claim 1 , wherein the case comprises a laminate sheet comprising aluminum or an alloy thereof.

Assignees

• Ahn Changbum
• Shin Jeongsoon
• Sohn Youngbae
• Samsung Sdi Co Ltd

Inventors

• Ahn Changbum
• Shin Jeongsoon
• Sohn Youngbae

Classifications

• H01M50/124 Primary

  having a layered structure · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M50/55

  on the same side of the cell · CPC title

• H01M50/119

  Metals · CPC title

• H01M50/536

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