Destruction controlling mechanism for an electrochemical cell

Details Destruction controlling mechanism for an electrochemical cell Destruction controlling mechanism for an electrochemical cell

1998-05-08

2000-04-25

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

With control means responsive to battery condition sensing...

429 94, 429162, H01M 1002

Patent

active

060542330

ABSTRACT:
An electrochemical cell is disclosed that includes a cell housing and a spiral-wound electrode assembly including wound alternating layers of a positive electrode, a separator, and a negative electrode. The electrochemical cell further includes a destruction control mechanism provided proximate an interior surface of the cell housing for piercing a portion of the separator layer to create an internal short circuit between outermost layers of the positive and negative electrodes of the spiral-wound electrode assembly when an excessive force is applied to the destruction control mechanism. The destruction control mechanism preferably includes burrs formed on the trailing end of the negative electrode that protrude toward the positive electrode so as to penetrate through the adjacent separator layer to create an internal short circuit when excessive force is applied to the burrs. Preferably, the burrs are created by stitching a conductive tab to an exposed portion of the conductive foil strip forming a portion of the negative electrode. To further increase the likelihood that the first internal short circuit will occur when the burrs penetrate the separator, the portion of the positive electrode underlying the burrs may be formed of exposed conductive foil to provide an inert region for the short circuit to occur.

REFERENCES:
patent: 4129686 (1978-12-01), Kaduboski
patent: 5508122 (1996-04-01), Narukawa et al.
patent: 5747188 (1998-05-01), Von Sacken et al.
patent: 5925482 (1999-07-01), Yamashita
Linden, Handbook of Batteries, Second Edition, McGraw-Hill, New York p. 36.43, 1995.
Japanese Patent Abstract for Publication No. 62229761, published Oct. 8, 1987.

Affiliated with

Also associated with

Rating

Destruction controlling mechanism for an electrochemical cell does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Destruction controlling mechanism for an electrochemical cell, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Destruction controlling mechanism for an electrochemical cell will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-991829