NOVELTY - The sensor device (110) has a terminal (114) that is provided for connecting the sensor device to a pad (104) in an electrically conductive manner. Specific connection material on a surface of the terminal (114) is arranged corresponding to a specific contact material on a surface of the pad (104). A terminal (116) is provided for connecting the sensor device to a pad (106) in an electrically conductive manner. Other connection material on a surface of terminal (116) is arranged corresponding to other contact material on a surface of pad (106).    USE - Sensor device for electrochemical energy store such as battery, battery cell, galvanic cell, electrochemical secondary cell and battery pack used in electric power tool, electrical appliance, electric car and hybrid car.    ADVANTAGE - Since the connection materials on the surface of terminals are respectively arranged corresponding to the contact materials on the surface of pads, the electrical interconnection between the sensor device and electrochemical energy store can be produced in simple, inexpensive, reliable and corrosion-avoiding manner. Since the terminals of sensor device and conductive pads of battery cell represent identical contact partners, the formation of local cells and contact corrosion can be avoided. Thus, the protection against corrosion of contact regions can be ensured effectively. As the sensor device is provided in the cell interior of electrochemical energy store, the reliability and durability of the sensor device can be improved.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an electrochemical energy store;    (2) a method for manufacturing sensor device for electrochemical energy store; and    (3) a method for performing electrical contact of sensor device in electrochemical energy store.    DESCRIPTION OF DRAWING(S) - The drawings show the schematic views of the electrochemical energy store and the sensor device.    Electrochemical energy store (100)    Pads (104,106)    Sensor device (110)    Sensor housing (112)    Terminals (114,116)