NOVELTY - The device (110) has a detection unit (111) to inductively couple with an electrically conductive layer (105), which is deflectable by the pressure (P) of a medium. The detection unit is designed to inductively detect a distance, which is dependent on the pressure of the medium, between the electrically conductive layer and the detection unit, so as to determine the pressure of the medium from the distance. A support element (112) for supporting the detection unit includes a circuit board and/or a plastic plate, and a media passage opening (113).    USE - Eddy current pressure sensor device for determining a pressure of a medium e.g. gas or gas mixture, liquid or liquid mixture, and gas-liquid mixture, located inside a housing of an electrochemical energy store of an electric car. Uses include but are not limited to an electrochemical secondary cell, a battery cell, a battery, or an accumulator.    ADVANTAGE - The detection unit and the electrically conductive layer, which induces the eddy current losses, do not have to be electrically connected to one another, thus enabling the sensor device to be implementable cost-effectively, without design intervention in the structure of the electrochemical energy store while enabling the prevailing pressure of the medium in the electrochemical energy store to be determined in a very simple manner. The sensor device is not exposed to the medium or the gas atmosphere of the electrochemical energy store, thus avoiding the need for medium resistance.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) an electrochemical energy store    (2) a method for manufacturing an electrochemical energy store    (3) a method for determining a pressure of a medium located inside an electrochemical energy store    (4) a computer readable storage device storing a computer program for determining a pressure of a medium located inside a housing of an electrochemical energy store.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of an electrochemical energy stores having an eddy current pressure sensor device.    Pressure (P)    Electrically conductive layer (105)    Eddy current pressure sensor device (110)    Detection unit (111)    Support element (112)    Media passage opening (113)