The electrochemical energy storage for vehicles and method for cooling or heating of such an electrochemical energy storage device

An electrochemical energy storage (1) has a housing (2) in which a plurality of flat galvanic cells (3) is arranged. Between two adjacent flat galvanic cells, a flat heat conducting element (4) and / or a flat elastic body (5) is arranged in each case. Preferably, the flat galvanic cells, the flat thermal conductors and / or the flat elastic body on the contact surfaces exert a force (11) in terms of a surface pressure from each other, and the housing has a wall with a structure or structures (8, 9) in which a heat conducting element (4) engages so that the heat-conducting body is displaceable in the direction of the acting force on the contact surfaces (11).