Abstract: Individual cells defined by metallic housing elements which at the same time serve as leads or pole plates (1, 2), have a narrow annular insulating body (3) which is arranged in the edge zone of the housing elements and holds the pole plates (1, 2) at a mutual distance. To obtain a stable cell assembly with precisely defined and reproduceable dimensions, an insulating body (3) is proposed which consists of a metal core (4) and an electrically insulating oxide-ceramic layer, formed thereon, as the potential insulation. The insulating body (3) is irreleasably joined to the pole plates (1, 2) by means of a connecting layer (8) which is resistant to chemicals.