NOVELTY - The electrochemical energy store comprises spatially delimited galvanic cell (1), which includes a component or a device, which causes the level of heat generated (2) within the galvanic cell to drop and/or below the level of heat dissipated (3) from the cell beyond the spatial boundaries of the cell when a threshold temperature inside the galvanic cell is locally exceeded. A chemical reaction and/or a mass transfer is locally inhibited by the component or the device within the galvanic cell. The thermal conductivity is locally increased within the galvanic cell.    USE - Used as an electrochemical energy store such as lithium-ion battery.    ADVANTAGE - The electrochemical energy store can be manufactured with good- durability and performance.    DETAILED DESCRIPTION - The electrochemical energy store comprises spatially delimited galvanic cell (1), which includes a component or a device, which causes the level of heat generated (2) within the galvanic cell to drop and/or below the level of heat dissipated (3) from the cell beyond the spatial boundaries of the cell when a threshold temperature inside the galvanic cell is locally exceeded. A chemical reaction and/or a mass transfer is locally inhibited by the component or the device within the galvanic cell. The thermal conductivity is locally increased within the galvanic cell temporarily or permanently by a heat pump within the galvanic cell. Within the galvanic cell, materials are stored, whose thermal conductivity increases with increasing temperature. The heat pump is controlled by sensor signals, which represent the measured temperatures within the inner cell. An INDEPENDENT CLAIM is included for a method for thermal stabilization of an electrochemical energy store with a galvanic cell.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of a heat generation in interior and the heat emission of an electrochemical energy store with galvanic cell.    Galvanic cell (1)    Generating heat (2)    Dissipating heat. (3)