two electrically non-conductive cell body halves, both cell body halves comprising at least one and one cell body half comprising at least three feedthroughs, both cell body halves each having a recess on an inside, the recesses together forming a receiving space for receiving a solid electrolyte battery cell comprising at least an anode, a cathode, and a solid electrolyte, and the feedthroughs each extending from an outer side of the cell body half towards the receiving space;

an electrically conductive retaining element for each feedthrough, the retaining element being equipped to be mechanically connectable to the respective cell body half;

an electrical contact element for each retaining element, the electrical contact element being attachable to the retaining element towards the receiving space and being adapted to change its length in dependence on force acting on the electrical contact element; and

two flat current conductors comprising electrically conductive and electrically non-conductive regions, at least one of the current conductors being equipped to form at least three separate, electrically conductive connections between the electrical contact elements and an electrode of the solid electrolyte battery cell,