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Sealed type battery

  • US 5,595,835 A
  • Filed: 05/22/1995
  • Issued: 01/21/1997
  • Est. Priority Date: 07/22/1993
  • Status: Expired due to Term
First Claim
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1. A sealed battery including a safety valve device in which metal plates in a laminate are integrally fixed by laser welding, said laminate being comprised of a cover plate having a hole, a metal thin plate, and a holding plate having a hole defined by a perimeter, characterized in that the hole of the holding plate extends throughout an entire area between the perimeter, and the metal thin plate is arranged between the cover plate and the holding plate so as to contact a bottom surface of the cover plate and a top surface of the holding plate and interrupt a gas discharging hole formed by the holes of the metal thin plate and cover plate.

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