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

Abstract

The present invention relates to a method for equalizing states of charge of a plurality of battery modules () of a battery (). The method comprises identifying each of the battery modules () which is to be discharged by means of a load resistor () which is associated with the respective battery module for the purpose of equalizing the states of charge. The method comprises carrying out, for each battery module () or each identified battery module (), a first evaluation, which is associated with the respective battery module, of its state of charge which occurs at a first time on a first day and/or of a first quantity of electrical energy and/or of a second quantity of electrical energy. An estimate for the first quantity of energy can be supplied by an energy conversion system to the battery () during the first day. An estimate for the second quantity of energy is supplied by the battery () to a load during the first day. The method comprises determining for each identified battery module (), on the basis of the first evaluation which is associated with the respective battery module, whether a discharge time, at which the respective battery module () is discharged by means of the load resistor () which is associated with it, occurs during the first day.