Abstract: A method for diagnosis of a temperature control means (30) of a battery pack (10) that comprises a plurality of battery cells (20) and a plurality of temperature sensors for measuring temperatures of the individual battery cells (20), the battery cells (20) being arranged side by side in the battery pack (10), in a longitudinal direction (12) of the battery pack (10), and mechanically connected to each another, and the battery cells (20) being arranged on the temperature control means (30) and mechanically and thermally connected to it. A battery management system, and/or a battery pack (10) may be configured to execute the method. A vehicle may be fitted with a battery pack that carries out the method.

Abstract: The invention relates to a method for determining a model error in a mathematical model of an electrical energy storage unit, which method comprises the following steps: a) providing a mathematical error model for determining the model error in the mathematical model, wherein the mathematical error model is provided in at least a two-part form, wherein a first model error of an open-circuit voltage curve of the mathematical model of the electrical energy storage unit is modelled by the first part of the error model, and a second model error of a voltage curve of the mathematical model is modelled on the basis of an electrical current by the second part of the error model; b) determining at least one current value, wherein the electrical current flows in the electrical energy storage unit; c) applying the determined current value to the mathematical error model as the input value for the mathematical error model; d) determining the model error of the mathematical model as an output value for the mathematical e

Abstract: A method for ascertaining at least one performance characteristic for the operation of an electrical energy store is described, comprising the steps of: a) receiving operating data, in particular current and/or voltage and/or temperature measured values, of a multiplicity of electrical energy stores, wherein the multiplicity of electrical energy stores satisfy a predefined criterion, for example a predefined number of operating hours; b) ascertaining at least one ageing state variable, in particular an electrical capacitance, of the multiplicity of electrical energy stores by evaluating the operating data of the multiplicity of electrical energy stores; c) ascertaining at least one performance characteristic for the operation of an electrical energy store, in particular a maximum charging current, on the basis of the at least one ageing state variable; d) transmitting the at least one performance characteristic to a further multiplicity of electrical energy stores.

Abstract: A method for diagnosis of a temperature control means (30) of a battery pack (10) that comprises a plurality of battery cells (20) and a plurality of temperature sensors for measuring temperatures of the individual battery cells (20), the battery cells (20) being arranged side by side in the battery pack (10), in a longitudinal direction (12) of the battery pack (10), and mechanically connected to each another, and the battery cells (20) being arranged on the temperature control means (30) and mechanically and thermally connected to it. A battery management system, and/or a battery pack (10) may be configured to execute the method. A vehicle may be fitted with a battery pack that carries out the method.