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Battery and protecting element therefor

  • US 5,939,217 A
  • Filed: 10/15/1997
  • Issued: 08/17/1999
  • Est. Priority Date: 10/29/1996
  • Status: Expired due to Term
First Claim
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1. A battery having a protecting element, which comprisesa cathode and an anode for effecting electrode reactions disposed in an electrode reaction part,a cathode terminal connected to the cathode,an anode terminal connected to the anode anda protecting element inserted in the connecting current path from the cathode to the cathode terminal or in the connecting current path from the anode to the anode terminal,said protecting element comprisinga base board composed of a first and a second conductor layer and an insulator layer interposed between said first and second conductor layers,a through-hole formed in the base board and a conductive member contained therein to provide electrical conduction between the first and the second conductor layers,at least one vacant space disposed in at least either one of said conductor layers in such a pattern as to leave a plurality of independent patches of conductor layer which are separated by the vacant space andone or more layers of a low-melting metal so arranged as to bridge the separated conductor patches to provide electrical conduction therebetween.

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