An electrical energy storage cell having - an at least partially electrically conductive housing, - at least two terminals (11, 12) on the electrically conductive housing, of which a first terminal is insulated from the housing and a second terminal is electrically conductively connected to the housing, and - a bridging device, which can be actuated by an external signal to connect the two terminals (11, 12) of the energy storage cell electrically to one another, characterised in that the bridging device acts between the first terminal and the housing of the energy storage cell, that the bridging device, when actuated by the external signal, produces an electrically conductive connection between a first electrical conductor and a second electrical conductor, wherein the first electrical is connected to the first terminal or is formed by the first terminal and the second electrical conductor is connected to the housing, and that the first and second electrical conductor are arranged such that at least one first surface region of the first conductor oriented in one spatial direction is distanced by a gap from at least one second surface region of the second conductor oriented in the same spatial direction, an electrically conductive bridging element is arranged above the two surface regions, the surface regions and/or a side of the bridging element directed towards the surface regions are provided with a solderable electrically conductive coating (16, 18, 22), and a reactive element is arranged above the surface regions, in which reactive element an exothermic reaction is triggered by the actuation of the bridging device by the external signal, the heat generated by said reaction fusing the solderable layers (16, 18, 22) to one another and/or producing a soldered connection between the bridging element and the two electrical conductors. - an at least partially electrically conductive housing, - at least two terminals (11, 12) on the electrically conductive housing, of which a first terminal is insulated from the housing and a second terminal is electrically conductively connected to the housing, and - a bridging device, which can be actuated by an external signal to connect the two terminals (11, 12) of the energy storage cell electrically to one another, characterised in that the bridging device acts between the first terminal and the housing of the energy storage cell, that the bridging device, when actuated by the external signal, produces an electrically conductive connection between a first electrical conductor and a second electrical conductor, wherein the first electrical is connected to the first terminal or is formed by the first terminal and the second electrical conductor is connected to the housing, and that the first and second electrical conductor are arranged such that at least one first surface region of the first conductor oriented in one spatial direction is distanced by a gap from at least one second surface region of the second conductor oriented in the same spatial direction, an electrically conductive bridging element is arranged above the two surface regions, the surface regions and/or a side of the bridging element directed towards the surface regions are provided with a solderable electrically conductive coating (16, 18, 22), and a reactive element is arranged above the surface regions, in which reactive element an exothermic reaction is triggered by the actuation of the bridging device by the external signal, the heat generated by said reaction fusing the solderable layers (16, 18, 22) to one another and/or producing a soldered connection between the bridging element and the two electrical conductors.