Energy storage device and method for cooling such an energy storage device

Electrical energy storage (2) 1.1 a plurality of capacitors (3), 1.2 of each of which are connected electrically to some of a memory module (1), wherein 1.3 each of the memory modules (1) in a housing (10) is arranged, wherein 1.4 the individual capacitors (3) are arranged in heat-conducting contact with the housing (10), wherein 1.5 a plurality of the housing (10) are stacked above or next to each other so that at least partial regions between the housings are flowed through by a fluid and wherein 1.6 the housing (10) consists of two wave-like or with successive convexities (5) provided with sheet metal parts (4) are constructed, which are closed along mutually connected via U-profiles (8) and at the end faces on the cover elements (9).