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Electrochemical Element

  • US 20080206635A1
  • Filed: 02/25/2008
  • Published: 08/28/2008
  • Est. Priority Date: 02/27/2007
  • Status: Active Grant
First Claim
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1. An electrochemical element, comprising:

  • a container having an end portion and an outer surface, where the end portion defines an opening, a metal film is formed on the end portion, a pair of external terminals are formed on the outer surface and the metal film is electrically connected to one of the pair of external terminals;

    a sealing plate for sealing an opening of the container, where a brazing material is placed on the sealing plate, and the container is sealed with the sealing plate by welding a portion of the brazing material on the sealing plate and a portion of the metal film of the container which make contact with each other together in a state where a first electrode active material, a separator, a second electrode active material and an electrolyte are contained in the container; and

    an electricity collector sheet, which is electrically connected to the first electrode active material or the second electrode active material, whichever is closer to the opening of the container, where at least a portion of the electricity collector sheet extends to the end portion of the container so that the container and the sealing plate are welded together with the extending portion of the electricity collector sheet in between.

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