US 9,865,864 B2Granted

Rechargeable battery

AssigneeSamsung SDI Co., Ltd.

InventorsChi-Young Lee, Myung-Jae Jang, Seung-Ho Kwak

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Abstract

A rechargeable battery that simplifies a structure that implements an external short circuit and that reduces a production cost is provided. The rechargeable battery includes: an electrode assembly that is formed by spiral-winding a first electrode and a second electrode that are disposed at respective surfaces of a separator interposed therebetween; a case that houses the electrode assembly; a cap plate that closes and seals an opening of the case; a first electrode terminal that is connected to the first electrode and that is installed in an insulation state in the cap plate; a second electrode terminal that is connected to the second electrode and that is electrically connected to the cap plate; and a vent plate that is installed in a vent hole of the cap plate and that is short-circuited with the first electrode terminal when the vent hole is opened.

Claims16

Dependent claims

A rechargeable battery, comprising:

an electrode assembly that includes a first electrode and a second electrode that are disposed at respective surfaces of a separator interposed therebetween;
a case having an opening and a vent hole that houses the electrode assembly;
a cap plate that closes and seals the opening of the case;
a first electrode terminal that is connected to the first electrode and that is installed in an insulation state in the cap plate;
a second electrode terminal that is connected to the second electrode and that is electrically connected to the cap plate;
and
a vent plate that is installed in the vent hole of the cap plate and that is short-circuited with the first electrode terminal when the vent hole is opened wherein the first electrode terminal is positioned over the vent plate and wherein the vent plate has a hinge and a notch wherein the hinge is interposed between the first electrode terminal and the notch wherein the notch is dimensioned so that the vent plate separates from the cap plate at a first pressure so that the vent plate rotates about the hinge such that an upper surface of the vent plate physically contacts the first electrode terminal.

4 more elements

A battery comprising:

an electrode assembly with a first and second electrode;
a case having a cap plate wherein the cap plate includes a vent opening wherein the electrode assembly is positioned within the case;
a first electrode terminal connected to the first electrode wherein the first electrode terminal extends outward of the cap plate wherein the first electrode terminal is insulated from the cap plate;
a vent plate that is formed to cover the vent opening of the cap plate, wherein the first electrode terminal is positioned over the vent plate and wherein the vent plate is formed to the cap plate such that the vent plate has a hinge and a notch wherein the hinge is interposed between the first electrode terminal and the notch and wherein the notch is dimensioned so that the vent plate deforms and opens the vent opening in response to a pre-determined pressure within the case so that the vent plate rotates about the hinge such that an upper surface of the vent plate contacts the first electrode terminal when opened in response to the pre-determined pressure.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 14/925,808Filed 28 Oct 2015
Priority: KR 10-2015-00293332 Mar 2015
Published: US 2016/0260961 A18 Sep 2016
Granted: 9 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H01M 50/578
Devices or arrangements for the interruption of current: in response to pressure
H01M 10/0431
Construction or manufacture in general: cells with wound or folded electrodes
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 50/55
Characterised by the disposition of the terminals on the cells: on the same side of the cell