US 6,296,965 B1Granted

Cell electrical path breaking mechanism

AssigneeAlps Electric Co., Ltd.

InventorTadamitsu Azema

Life of this patent

Estimating the term…

Loading patent…

Abstract

A cell electrical path breaking mechanism in which an electrical path is formed between a cell case and an external cathode through a diaphragm and a connection member. When the internal pressure in the cell case increases to a value equal to or greater than a predetermined value, causing the diaphragm to be displaced upward, the connection member is severed, so that the electrical path is broken. Even when flammable gas or the like is generated in the cell due to an abnormality in the cell, the cell electrical path breaking mechanism makes the cell safe to use by preventing an arc produced when the connection member is severed as a result of the displacement of the diaphragm from igniting the flammable gas.

Claims9

Dependent claims

A cell electrical path breaking mechanism comprising:

a cell case connected to a generating element accommodated in the cell case;
a cell cover for hermetically sealing the cell case;
a diaphragm formed at a portion of the cell cover, the diaphragm being displaceable in accordance with changes in internal pressure in the battery case;
a connection member disposed above the diaphragm for connection to the diaphragm;
an external electrode electrically connected to the connection member;
and
a holding member for holding the external electrode, with the connection member being joined to the diaphragm;
wherein an electrical path is formed between the cell case and the external electrode through the diaphragm and the connection member;
and
wherein when the internal pressure in the cell case increases to a value equal to or greater than a predetermined value, causing the diaphragm to be displaced upward or turned, the connection member is severed, causing the electrical path to be broken.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/392,345Filed 8 Sep 1999
Priority: JP 10-25731910 Sep 1998
Granted: 2 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01M 50/578
Devices or arrangements for the interruption of current: in response to pressure
H01M 50/574
Means for preventing undesired use or discharge: devices or arrangements for the interruption of current
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
Y02E 60/10
Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation: energy storage using batteries

Family

No related US applications are recorded in the indexed filing history.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key