• US 20170025703A1
  • Filed: 10/03/2016
  • Published: 01/26/2017
  • Est. Priority Date: 02/09/2009
  • Status: Active Grant
First Claim
Patent Images

1. A button cell comprising:

  • a housing cup and a housing top separated from one another by an electrically insulating seal and which form a housing with a flat bottom area and a flat top area parallel to it, andan electrode-separator assembly within the housing comprising at least one positive and at least one negative electrode in the form of flat layers and connected to one another by at least one flat separator,whereinthe electrode layers are aligned essentially at right angles to the flat bottom area and the flat top area and the electrode-separator assembly is a spiral winding having end faces defining side surfaces of the spiral winding facing in an axial direction relative to the flat bottom area and the flat top area,one of the electrodes connects to the flat bottom area or the flat top area via an output conductor comprising a thin foil resting flat between an end face of the spiral winding and the flat top or the flat bottom area to which it is connected, andat least one insulating means preventing direct mechanical and electrical contact between the end faces of the winding and the flat bottom and flat top areas.

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