Rechargeable battery

Patent metadata

Field	Value
Publication number	US-2017170450-A1
Application number	US-201615231598-A
Country	US
Kind code	A1
Filing date	Aug 8, 2016
Priority date	Dec 14, 2015
Publication date	Jun 15, 2017
Grant date	—

Abstract

A rechargeable battery includes an electrode assembly; a case accommodating the electrode assembly; a cap plate covering the case and including an injection hole sealed by a ball; and a terminal plate covering the injection hole and the ball.

First claim

What is claimed is:

1 . A rechargeable battery comprising:
an electrode assembly; a case accommodating the electrode assembly; a cap plate covering the case and including an injection hole sealed by a ball; and a terminal plate covering the injection hole and the ball.

2 . The rechargeable battery of claim 1 , wherein the terminal plate is welded to a region of the cap plate outside the injection hole.

3 . The rechargeable battery of claim 1 , wherein the cap plate includes a first surface that is planar and faces the electrode assembly, a second surface that is planar, is located opposite to the first surface, and faces the terminal plate, a first protrusion part protruding from the first surface towards the electrode assembly, and a second protrusion part protruding from the second surface towards the terminal plate.

4 . The rechargeable battery of claim 3 , wherein the injection hole includes a throughhole centrally formed in the first protrusion part, and a recess formed in the second surface and connected to the throughhole.

5 . The rechargeable battery of claim 4 , wherein the ball is coupled to the throughhole.

6 . The rechargeable battery of claim 4 , wherein the terminal plate includes a planar first region contacting a bottom surface of the recess, a slanted second region extending from the first region and contacting side surfaces of the recess, a planar third region extending from the second region and contacting the second surface of the cap plate, a slanted fourth region extending away from the third region and the second surface of the cap plate, a planar fifth region extending from the fourth region and welded to a bus bar, a planar sixth region extending from the fifth region and towards the second surface of the cap plate, and a planar seventh region extending from the sixth region and contacting the second surface of the cap plate.

7 . The rechargeable battery of claim 6 , wherein a groove is formed in the seventh region of the terminal plate and wherein the second protrusion part of the cap plate is coupled to the groove.

8 . The rechargeable battery of claim 6 , wherein the seventh region of the terminal plate is welded to the second protrusion part.

9 . The rechargeable battery of claim 6 , wherein the third region of the terminal plate is welded to one region of the second surface of the cap plate.

10 . The rechargeable battery of claim 6 , wherein the space is defined by the fourth, fifth, and sixth regions of the terminal plate.

11 . The rechargeable battery of claim 1 , wherein the ball comprises a metal core and a resin coated on a surface of the metal core.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Guen Minhyung

Classifications

• H01M50/15

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

• H01M50/593

  Spacers; Insulating plates · CPC title

• H01M50/191

  Inorganic material · CPC title

• H01M50/184

  characterised by their shape or structure · CPC title

• H01M50/186

  characterised by the disposition of the sealing members · CPC title