Abstract: Apparatus for supplying voltage to a motor vehicle, in particular a storage module, includes a cell stack with a plurality of storage cells, which each have a storage cell housing and, a front and a rear plate-like element, which are each connected to one another via a left-hand and a right-hand clamping element. The cell stack is clamped in between the plate-like elements by use of the clamping elements. In addition, outer wall insulation is provided which extends in the manner of a ring or sleeve along storage cell outer walls around the cell stack and electrically insulates the cell stack with respect to the plate-like elements and/or the clamping elements.