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STACK TYPE BATTERY

  • US 20090197160A1
  • Filed: 02/02/2009
  • Published: 08/06/2009
  • Est. Priority Date: 01/31/2008
  • Status: Abandoned Application
First Claim
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1. A stack type battery comprising:

  • a stacked electrode assembly comprising a plurality of positive electrode plates having respective positive electrode current collector tabs extending outwardly therefrom, a plurality of negative electrode plates having respective negative electrode current collector tabs extending outwardly therefrom, and separators, the positive electrode plates and the negative electrode plates being alternately stacked one upon the other with the separators interposed therebetween;

    a square-shaped laminate battery case, for enclosing the stacked electrode assembly and an electrolyte solution in an accommodating space therein, being formed by welding peripheral edges of one or more laminate films each comprising a metal layer and a plastic layer;

    a positive electrode current collector terminal joined to the positive electrode current collector tabs being overlapped with each other and a negative electrode current collector terminal joined to the negative electrode current collector tabs being overlapped with each other, the positive and negative electrode current collector terminals protruding from one side of the laminate battery case in a separated manner with respect to its center line; and

    at least one insulative spacer, for compressing respective joined portions between the positive and negative electrode current collector tabs and the positive and negative electrode current collector terminals, the at least one insulative spacer being disposed in a tab-connecting space, the tab-connecting space being between an inner face of the laminate battery case through which the positive and negative electrode current collector terminals protrude and a face of the stacked electrode assembly from which the positive and negative electrode current collector tabs protrude, and having an inward displacement restricting protrusion, for restricting inward displacement of the positive and negative electrode current collector terminals, being provided at a location of the spacer corresponding to a region between the positive and negative electrode current collector terminals.

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