Calibration method for a current measuring system

Calibration method for a current measuring system for measuring an electrical current of an electrochemical energy storage system having a plurality of electrochemical energy stores, comprising the following steps: storing first data in a data memory of the energy store during a tape end test of the energy storage; Reading out first data from the respective data memories of the plurality of energy stores and checking the first data when the energy storage system is put into operation; Calibrating a current measurement of an electrical current flowing through the energy storage system and / or the energy store; Determining a correction factor for the energy storage system and / or correction factors for the energy storage based on the calibration in one of the previous steps; Determining replacement values for correction factors of those energy stores of the energy storage system for which no correction factor can be determined in a previous step; Saving second data in a memory of a control device of the energy storage system, comprising at least one determined in a previous step correction factor and / or a determined substitute value for the energy storage system and / or the energy storage.