Rechargeable battery having insulation case

Patent metadata

Field	Value
Publication number	US-9570731-B2
Application number	US-201414279259-A
Country	US
Kind code	B2
Filing date	May 15, 2014
Priority date	Dec 16, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A rechargeable battery includes an electrode assembly including a first electrode, a second electrode, and a separator located between the first electrode and the second electrode; a case accommodating the electrode assembly; a cap plate sealing an opening of the case; and an insulation case located between the cap plate and the electrode assembly, the insulation case having a base and a side wall protruding from the base, the side wall including avoiding portions formed thereon.

First claim

What is claimed is:

1. A rechargeable battery comprising:
an electrode assembly including a first electrode, a second electrode, and a separator located between the first electrode and the second electrode;
a case accommodating the electrode assembly;
a cap plate sealing an opening of the case, the cap plate having an alignment protrusion protruding towards the electrode assembly;
an insulation case located between the cap plate and the electrode assembly, the insulation case having a base and a side wall protruding from the base, the side wall including recessed avoiding portions formed thereon,
a first tab on the first electrode, the first electrode electrically connected with the cap plate via the first tab;
a second tab on the second electrode; and
a connection plate electrically connected to the second tab and being rotatable with respect to the cap plate, wherein the connection plate has a pair of short circuit protrusions spaced from each other such that a first protrusion of the pair of short circuit protrusions is configured to contact the case and a second protrusion of the pair of short circuit protrusions is configured to contact the alignment protrusion if the case is bent.

2. The rechargeable battery of claim 1 , wherein the avoiding portions are recessed toward a lower portion from an upper end of the side wall, wherein a height of the avoiding portions is less than a height of the insulation case, and wherein at least part of the connection plate faces with the avoiding portions.

3. The rechargeable battery of claim 1 , wherein the avoiding portions are openings that penetrate the side wall.

4. The rechargeable battery of claim 1 , wherein the avoiding portions are provided between a side end of the connection plate and a side surface of the case, and wherein the side end of the connection plate faces with the side surface of the case.

5. The rechargeable battery of claim 1 , wherein the connection plate is fixed to the cap plate by a terminal that penetrates the cap plate and the connection plate.

6. The rechargeable battery of claim 5 , further comprising an insulation plate located between the cap plate and the connection plate.

7. The rechargeable battery of claim 6 , wherein the connection plate comprises a short-circuit step extending from lateral side ends and protruding in a width direction of the connection plate.

8. The rechargeable battery of claim 7 , wherein the avoiding portions are located between the short-circuit step and the side surfaces of the case.

9. The rechargeable battery of claim 5 , wherein the connection plate comprises a first portion to which the first tab is attached and a second portion through which the terminal penetrates, wherein the second portion has a greater width than the first portion.

10. The rechargeable battery of claim 9 , wherein a short-circuit step protruding to the outside from a side end of the first portion is formed at an intersection of the first portion and the second portion.

11. The rechargeable battery of claim 9 , wherein the avoiding portions are located between the second portion and the side surface of the case.

12. The rechargeable battery of claim 11 , wherein two avoiding portions separated from each other face each other along a width direction of the insulation case.

13. The rechargeable battery of claim 9 , wherein the short-circuit protrusions extend from an end of the second portion.

14. The rechargeable battery of claim 13 , wherein the alignment protrusion is located between the short-circuit protrusions.

15. The rechargeable battery of claim 14 , wherein a cut-out portion extending in a length direction of the short-circuit protrusion is formed in a portion where the short-circuit protrusions and the second portion are connected.

16. The rechargeable battery of claim 14 , wherein a groove is located between the short-circuit protrusions, and wherein the groove is recessed toward an inner side from the second portion.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Seong Jae-Il
• Yoshio Hideaki
• Yun Ji-Won
• Seo Kwang-Sik

Classifications

• H01M50/528 Primary

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

• H01M50/553

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

• H01M50/176

  for prismatic or rectangular cells (H01M50/181 takes precedence) · CPC title

• H01M2200/00

  Safety devices for primary or secondary batteries · CPC title

• H01M50/579

  in response to shock · CPC title