Rechargeable battery

Patent metadata

Field	Value
Publication number	US-9412992-B2
Application number	US-201414227223-A
Country	US
Kind code	B2
Filing date	Mar 27, 2014
Priority date	May 28, 2013
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A rechargeable battery includes a case, a cap plate coupled with the case, a terminal passing though a terminal hole in the cap plate, the terminal hole, and a sealing member in the terminal hole partially enclosing the terminal. The terminal includes an upper connecting part extending outside the case from a middle connecting part, and a current collector connecting part extending inside the case from the middle connecting part. The sealing member includes an upper sealing part seated on the cap plate and a lower sealing part disposed in and affixed to the terminal hole in a sealing relationship with respect thereto, the upper sealing part being between the cap plate and the upper connecting part to support the upper connecting part in a spaced apart relationship with the cap plate, the lower sealing part being between the current collector connecting part and an entirety of the terminal hole.

First claim

What is claimed is:

1. A rechargeable battery, comprising:
a case having an electrode assembly therein;
a cap plate coupled with the case;
a terminal that passes through a terminal hole in the cap plate, the terminal hole having a length in a first direction, the terminal being in a form of an elongated plate including a middle connecting part, an upper connecting part and a current collector connecting part, the upper connecting part and the current collector connecting part being bent from the middle connecting part;
a sealing member in the terminal hole, the sealing member partially enclosing the terminal; and
a block part on an inside of the terminal hole and a supporting part in the sealing member, the supporting part being fitted and coupled with the block part,
wherein:
the middle connecting part extends through the terminal hole in a direction perpendicular to the cap plate, the upper connecting part extends outside the case parallel to the cap plate in the first direction from the middle connecting part to partially overlap the cap plate outside the case, and the current collector connecting part-extends from the middle connecting part parallel to the cap plate in the first direction inside the case, a lower surface of the current collector connecting part including a protrusion extending in a direction away from the cap plate, the protrusion being inserted into a current collector member that connects the terminal with the electrode assembly, and
the sealing member includes an upper sealing part seated on the cap plate and a lower sealing part disposed in and affixed of the terminal hole in a sealing relationship with respect thereto, the upper sealing part being between the cap plate and the upper connecting part to support the upper connecting part in a spaced apart relationship with the cap plate such that an entire surface of the upper connecting part facing the cap plate directly contacts the upper sealing part, the lower sealing part being between the current collector connecting part and an entirety of the terminal hole.

2. The rechargeable battery as claimed in claim 1 , wherein the upper sealing part isolates and electrically insulates the upper connecting part from the cap plate.

3. The rechargeable battery as claimed in claim 1 , wherein the current collector connecting part has a length in the first direction less than the length of the terminal hole such that the current collector connecting part does not overlap the cap plate.

4. The rechargeable battery as claimed in claim 3 , wherein the length of the current collector connecting part is about 60% to about 95% of the length of the terminal hole.

5. The rechargeable battery as claimed in claim 3 , wherein:
the terminal hole has an elongated configuration in the first direction, and
the current collector connecting part is positioned under the terminal hole.

6. The rechargeable battery as claimed in claim 1 , wherein:
the block part includes a protrusion, and
the supporting part includes a groove into which the block part is inserted.

7. The rechargeable battery as claimed in claim 1 , wherein:
the block part includes a groove, and
the supporting part includes a protrusion that is inserted into the groove.

8. The rechargeable battery as claimed in claim 1 , wherein the block part has a concave-convex shape in which a concave portion and a convex portion are alternately disposed, the concave-convex shape being formed along an inner circumferential surface of the terminal hole, and the supporting part has a concave-convex shape that is inserted into the block part.

9. The rechargeable battery as claimed in claim 1 , wherein the block part and the supporting part mesh with each other in a serrated, toothed, or zigzag configuration.

10. The rechargeable battery as claimed in claim 1 , wherein:
the supporting part in the sealing member is formed at a circumference of the lower sealing part.

11. The rechargeable battery as claimed in claim 10 , wherein:
the lower sealing part includes a hole through which the middle connecting part extends, and
a lower surface of the lower sealing part includes a seating groove into which the current collector connecting part is inserted alongside the terminal hole.

12. The rechargeable battery as claimed in claim 11 , wherein the sealing member is one piece.

13. The rechargeable battery as claimed in claim 12 , wherein the sealing member is formed by insert injection.

14. The rechargeable battery as claimed in claim 1 , wherein:
the upper connecting part extends toward a center of the cap plate from the middle connecting part, and
the current collector connecting part extends in the first direction toward a side end of the cap plate from the middle connecting part.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Song Jang-Hyun
• Kim Yong-Sam

Classifications

• H01M50/176 Primary

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

• H01M50/15

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · 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