Patent ID: 8586232

Claim:
A button cell with a housing and without flanging comprising: a cell cup and a cell cover connected to one another via a thermoplastic film seal, wherein the cell cup comprises a base region, a lateral region, an edge region lying therebetween and a cut edge, the cell cover comprises a cover region, a lateral region, an edge region lying therebetween and a cut edge, the cell cover is inserted into the cell cup such that within an overlapping area between 20 and 99% of the lateral region of the cell cup overlap with the lateral region of the cell cover, and an internal radius of the cell cup is constant in the overlapping area in a direction of the cut edge, and wherein at least a part of the lateral region of the cell cup which does not overlap the lateral region of the cell cover is drawn radially inwardly such that an external radius of this part of the lateral region of the cell cup is smaller than an external radius of the lateral region of the cell cup in the overlapping area.