NOVELTY - The device (1) has a memory cell arrangement (10) comprising electro-chemical memory cells e.g. lithium-based battery cells and/or dual layer capacitors (11-1, 11-2, 12-1, 12-2). The arrangement is detachably connected in a force fit manner with a heat conducting cooling device (20), which discharges heat supplied from the cells or the capacitors. The certain memory cells and/or capacitors are thermally connectable with the cooling device. The cooling device stands in thermal contact with profile elements (30, 31-0, 32-0). A plastic supporting element is provided between the profile elements.    USE - Device for voltage supply of an electrical motor operated drive of a motor vehicle e.g. passenger car, lorry and a motorcycle (all claimed). Can also be used for an electrical vehicle, fuel cell vehicle and hybrid vehicle.    ADVANTAGE - The memory cell arrangement is detachably connected in a force fit manner with the heat conducting cooling device, which discharges heat supplied from the memory cells and/or the dual layer capacitors, thus ensuring uniform temperature distribution between memory cells and the capacitors, and hence achieving thermal balance between adjacent memory cells and/or dual layer capacitors. The sufficient cooling of the voltage supply device with increased safety is ensured, and the constructional expenditure is thus reduced. The uniform temperature distribution between the adjacent memory cells and/or the dual layer capacitors increases the service life of the voltage supply device.    DETAILED DESCRIPTION - The profile elements are made of good heat conducting material such as a metal sheet, metal frame or a filled plastic element. The memory cell arrangement is subjected with tensioning force by a tensioning device made of plastic. The profile elements are designed as extruding press profiles.    DESCRIPTION OF DRAWING(S) - The drawing shows a partial sectional view of a voltage supply device.    Voltage supply device (1)    Memory cell arrangement (10)    Dual layer capacitors (11-1, 11-2, 12-1, 12-2)    Heat conducting cooling device (20)    Profile elements (30, 31-0, 32-0)