Secondary battery

Patent metadata

Field	Value
Publication number	US-9620747-B2
Application number	US-201414580947-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Apr 11, 2014
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A secondary battery includes a case including an accommodating space therein, an electrode assembly in the accommodating space of the case, a collecting plate electrically connected to the electrode assembly, a cap plate sealing the case, the collecting plate passing through the cap plate, a terminal plate coupled to an exposed end of the collecting plate, and an insulation member between the cap plate and the terminal plate, the insulation member including a sealing member on at least one surface thereof.

First claim

What is claimed is:

1. A secondary battery, comprising:
a case including an accommodating space therein;
an electrode assembly in the accommodating space of the case;
a cap plate sealing the case;
a collecting plate including a first portion, the first portion passing through the cap plate and being electrically connected to the electrode assembly;
a terminal plate coupled to the first portion of the collecting plate;
an insulation member between the cap plate and the terminal plate in a first direction; and
a sealing member on at least one surface of the insulation member, wherein
at least one portion of the insulation member is between the sealing member and the first portion of the collecting plate in a second direction perpendicular to the first direction.

2. The secondary battery as claimed in claim 1 , wherein the sealing member is in a form of an O-ring located along a periphery of the first portion of the collecting plate.

3. The secondary battery as claimed in claim 1 , wherein:
the insulation member includes a penetration hole through which the collecting plate passes, and
the sealing member surrounds the periphery of the penetration hole.

4. The secondary battery as claimed in claim 3 , wherein the sealing member is continuously formed along the periphery of the penetration hole.

5. The secondary battery as claimed in claim 1 , wherein the insulation member includes a sealing groove at a region corresponding to the sealing member, the sealing groove accommodating the sealing member.

6. The secondary battery as claimed in claim 1 , wherein the sealing member is adhered to the insulation member by an adhesion member and presses the cap plate and the terminal plate.

7. The secondary battery as claimed in claim 1 , wherein the sealing member includes at least one selected from the group of foamed sponge, ethylene propylene diene rubber, acrylic rubber, silicone rubber, an elastomer, a thermoplastic elastomer, a thermoplastic urethane, a rubber-like material, and a polymer plastic.

8. The secondary battery as claimed in claim 1 , wherein the sealing member protrudes relative to the insulation member in a state prior to the cap plate and terminal plate being coupled to each other, and is compressed in a state that the cap plate and the terminal plate are coupled thereto.

9. The secondary battery as claimed in claim 1 , wherein;
the sealing member is on a surface on which the insulation member makes contact with the cap plate, and
the insulation member further includes a ventilation groove on the surface, the ventilation groove overlapping the sealing member.

10. The secondary battery as claimed in claim 9 , wherein:
one end of the ventilation groove is positioned within the periphery of the sealing member, and
another end of the ventilation groove extends to the exterior of the periphery of the sealing member.

11. The secondary battery as claimed in claim 10 , wherein the other end of the ventilation groove extends to an exterior edge of the insulation member.

12. The secondary battery as claimed in claim 9 , wherein the sealing member is a foamed sponge.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Kim Dukjung
• Kim Taeahn

Classifications

• H01M50/394 Primary

  Gas-pervious parts or elements · CPC title

• H01M50/567

  by fixing means, e.g. screws, rivets or bolts · CPC title

• H01M50/188

  the sealing members being arranged between the lid and terminal · CPC title

• H01M50/562

  characterised by the material · CPC title

• H01M50/184

  characterised by their shape or structure · CPC title