Abstract: A cell for the electrochemical storage of electrical energy includes: a first sub-cell and a second sub-cell, which are each designed for the electrochemical storage of electrical energy; and a first electrolyte-stable insulation body for thermally insulating the first sub-cell and the second sub-cell from each other. The insulation body is arranged in an interstice between the first and second sub-cells, which is delimited by a side face of the first sub-cell and a side face of the second sub-cell, wherein the first insulation body has a first thermally insulating material having a thermal conductivity of at most 1 W/(m K) and a first heating structure designed to heat the first sub-cell and the second sub-cell, and wherein the first insulation body is electrically insulated from both the first sub-cell and the second sub-cell. A battery with such a cell and a vehicle with such a battery are also disclosed.

Abstract: A method for diagnosing lithium plating in lithium ion batteries includes performing electrochemical impedance spectroscopy analysis on complete or undisassembled lithium-ion batteries under different temperatures.

Abstract: A battery cell has a plurality of electrode units in a common battery cell housing. Each of the electrode units includes a protective film having an inner layer and an outer layer, where the inner layer is arranged on the electrode unit and the outer layer is arranged on the inner layer. The outer layer has a higher melting point than the inner layer.

Abstract: Please replace the original Abstract with the following new Abstract: A method for detecting abnormal self-discharge in a battery system by monitoring the balancing charge for each cell and a battery system which is configured to use this method are provided. The method makes it possible to predict the probability of the occurrence of a safety-critical state, for example, an internal short circuit, with the result that suitable countermeasures can be taken in good time.