Energy accumulator emulator and method for emulation of an energy accumulator emulator

An energy accumulator emulator comprising:

• an energy accumulator model configured and arranged for emulation of an electrical energy accumulator, the electrical energy accumulator including
• a plurality of cells, and
• at least one real reference cell which is connected by means of a cell tester to the energy accumulator emulator;
• wherein the energy accumulator emulator is configured and arranged to convert an electrical load current demand on the electrical energy accumulator to a load current demand on the at least one reference cell on the basis of the configuration of the electrical energy accumulator, and to apply the load current demand to the at least one reference cell by means of the cell tester in the form of a cell tester load current, and the cell tester is configured and arranged to
• detect the cell voltage of the at least one reference cell in response to the cell tester load current, and
• supply it to the energy accumulator emulator;
• and
• wherein the energy accumulator emulator is further configured and arranged to
• convert the cell voltage of the reference cell into a first energy accumulator voltage on the basis of the configuration of the electrical energy accumulator, and
• calculates a second energy accumulator voltage from the load current demand on the basis of the energy accumulator model, and
• compares the first energy accumulator voltage and the second energy accumulator voltage, and
• adapts the energy accumulator model if the first energy accumulator voltage deviates by a predetermined tolerance range from the second energy accumulator voltage.