Method for equalizing states of charge of a plurality of battery modules of a battery and corresponding apparatus

A method for equalizing states of charge of a plurality of battery modules (20) of a battery (10) which are connected in series, for supplying a consumer with electrical energy and for storing electrical energy which is generated by a stationary energy conversion system via conversion of renewable energy, the method comprising:

• identifying each one of the battery modules (20) which is to be discharged via an associated load resistor (30), for equalizing the states of charge;
• carrying out, for each battery module (20) or each identified battery module (20), a first evaluation, which is associated with said battery module and which takes place at a first time of a first day, of (a) a state of charge of the respective battery module (20) occurring at the first time, (b) a first amount of electrical energy which is expected to be suppliable by the energy conversion system to the battery (10) during the first day, (c) of a second amount of electrical energy which is expected to be supplied by the battery (10) to the consumer during the first day or any combination of (a) (b), and (c);
• and
• determining, for each identified battery module (20), based on the first evaluation associated with said battery module, whether a time of discharge, at which the respective battery module (20) is discharged via its associated load resistor (30), occurs during the first day.