US 2020/0091482 A1 · Secondary Battery

Abstract

The disclosed secondary battery is capable of preventing a short-circuit pressure at which the safety vent is ruptured from being reduced due to deformation of the safety vent during assembly of the battery. The secondary battery of the present invention includes a can member accommodating an electrode assembly and a top cap assembly covering an opening of the can member. A safety vent is provided in the top cap assembly to discharge a gas when an inner pressure of the can member increases, wherein the safety vent includes a main body and a bending unit, in which an outer edge of the main body is bent, and wherein a buffering space is defined between the bending unit and the main body.

Claims13

Dependent claims

A secondary battery comprising:

a can member accommodating an electrode assembly;
a top cap assembly covering an opening of the can member;
and
a safety vent provided in the top cap assembly to discharge a gas when an inner pressure of the can member increases,
wherein the safety vent comprises:
a main body;
and
a bending unit in which an outer edge of the main body is bent,
wherein a buffering space is defined between the bending unit and the main body.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/614,262Filed 7 Nov 2018

Priority

KR 10-2017-015364917 Nov 2017

Published

19 Mar 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H01M 50/3425
Non-re-sealable arrangements: in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
H01M 50/147
Primary casings; Jackets or wrappings: lids or covers
H01M 50/152
Characterised by their shape: for cells having curved cross-section, e.g. round or elliptic
H01M 50/167
Characterised by the methods of assembling casings with lids: by crimping

Secondary Battery

Life of this patent

Secondary Battery

Life of this patent

Abstract

Claims13