Rechargeable battery

Patent metadata

Field	Value
Publication number	US-8993138-B2
Application number	US-56403309-A
Country	US
Kind code	B2
Filing date	Sep 21, 2009
Priority date	Oct 2, 2008
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

A rechargeable battery according to the present invention includes an electrode assembly that includes a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode, a case that contains the electrode assembly and a cap assembly that is connected to the case. The positive electrode includes a current collector and a positive active material layer that includes an NCM-based positive active material disposed at the collector. The cap assembly includes a vent plate having a notch, and a current interrupt portion that interrupts electrical connection in a case of an increase in pressure inside the case. When a current interrupt pressure of the current interrupt portion is “A,” a vent fracture pressure at which the vent plate fractures at the notch is “B,” and the capacity of the rechargeable battery is “X,” they satisfy a formula of A/B=1.22−0.39X+D (−0.08≦D≦0.08).

First claim

What is claimed is:

1. A rechargeable battery comprising:
an electrode assembly comprising a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode;
a case containing the electrode assembly; and
a cap assembly coupled to the case,
the positive electrode comprising a current collector and a positive active material coupled to the current collector, the positive active material comprising a lithium(li)-nickel(Ni) -co…

Assignees

• Kim Jin-Hee
• Samsung Sdi Co Ltd

Inventors

• Kim Jin-Hee

Classifications

• H01M50/574

  Electricity · mapped topic

• H01M2200/20

  Electricity · mapped topic

• H01M50/107

  Electricity · mapped topic

• H01M10/058

  Electricity · mapped topic

• Y02E60/10

  Cross-Sectional Technologies · mapped topic