Battery and protecting element therefor

Details Battery and protecting element therefor Battery and protecting element therefor

1997-10-15

1999-08-17

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

With nonbattery electrical component electrically connected...

429 53, 429 56, 429 61, 429 62, H01M 212

Patent

active

059392177

ABSTRACT:
A battery having a protecting element which has a simple structure and is easy to be miniaturized to permit installation within the battery cell without altering the structure and the production plan of the battery cell to a considerable extent and which has a function of melting down reliably upon detection of an abnormal state of the temperature or current of the battery. The protecting element 1 is formed from a base board 5 which is composed of an insulator layer 2 interposed between a first and a second conductor layer 3 and 4 and is provided with a through-hole 6 so as to bring about electrical conduction between the first and second conductor layers, wherein one of the conductor layers (3) is subdivided into a plurality of independent conductor layer patches (3a and 3b) separated by a vacant space 7 and the so-separated patches (3a and 3b) are bridged with a low-melting metal layer 8 to provide electrical conduction therebetween to build up a fuse unit 11 sealed by a protection member 10 and a safety valve 15 is formed in the through-hole 6 by covering the through-hole 6 with a lamellar closure member 13, wherein the protecting element 1 is installed in the battery cell integrally with the cathode terminal 16 via a PTC element.

REFERENCES:
patent: 5750277 (1998-05-01), Vu et al.
patent: 5853912 (1998-12-01), Naing et al.

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