NOVELTY - The cell (100) has a device for uncoupling and/or bridging terminals (125) of the cell. A mechanical safety element (120) separates and/or short-circuits the terminals of the cell. An integrated monitoring sensor (130) delivers a measured variable (160) in a state of the cell. A monitoring device (140) monitors the cell using the monitoring sensor, and outputs an electrical trigger signal (170). A triggering device (150) triggers the safety element using the electrical trigger signal based on the measured variable. The safety element bridges terminals (115) of an energy storage (110).    USE - Battery cell for a lithium-ion battery, which is used as a starter battery and a traction battery for storing electrical energy for an electric vehicle e.g. passenger car and lorry. Can also be used for a vehicle including a hybrid drive.    ADVANTAGE - The triggering device triggers the mechanical safety element using the electrical trigger signal based on the measured variable, thus allowing inexpensive irreversible triggering of the mechanical safety element, and hence reliably preventing irreversible damage of the cell, and achieving the intrinsically safe battery cell. The cell increases a total performance of the battery. The cell has an increased service life, an overall performance, an improved quality and temperature distribution.    DETAILED DESCRIPTION - The mechanical safety element is an overcharge protection circuit and a passive current interrupt device. The measured variable is a battery cell temperature. An INDEPENDENT CLAIM is also included for a method for uncoupling and/or bridging terminals of a battery cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a battery cell.    Lithium-ion battery cell (100)    Energy storage (110)    Terminals of an energy storage (115)    Mechanical safety element (120)    Terminals of a cell (125)    Integrated monitoring sensor (130)    Monitoring device (140)    Triggering device (150)    Measured variable (160)    Electrical trigger signal (170)