Verfahren zum Betreiben einer Batterie für eine zweite Lebensdauer

Verfahren zum Betreiben einer Batterie für eine zweite Lebensdauer (,,Second-Life-Betrieb"). The invention relates to a method for operating a battery for a second life ("second life operation"), to a device for operating a battery, to a computer program, and to the use of a device for operating a battery. The method comprises the following steps: activating the battery by means of the control unit and detecting a voltage value representative of a voltage of the battery; starting the battery with a significantly lower electrical power than normal operation and increasing the current value representative of the maximum allowable current step by step; transmitting the current value to an inverter which can be electrically connected with the battery; detecting voltage and current values for each charge and discharge of the battery; an equivalent circuit diagram model of the battery is parameterized using the voltage and/or current values for learning and optimizing battery parameters. The device comprises an inverter and at least one means, in particular an electronic control unit, which is designed to carry out the steps of the method according to the invention.