Method and device for cell voltage equalization of battery cells of multi-cell energy storage

摘要

The invention relates to a method for cell voltage equalization between individual battery cells (Z) of an energy store (3) consisting of several battery cells (Z), the cell voltage equalization between the battery cells (Z) being controlled by an electronic control device (2). Before cell voltage equalization is carried out operationally, overall efficiencies (1) for cell voltage equalization are determined in advance by the electronic control device (2) with different numbers of simultaneously balanced battery cells (Z). When cell voltage equalization is carried out operationally by the electronic control device (2), the number of battery cells (Z) to be equalized at the same time is selected, taking into account the overall efficiency (1) determined in advance, so that the overall efficiency (1) when cell voltage equalization is carried out operationally by the electronic The invention also relates to an electronic control device (2) for controlling a cell voltage equalization between individual battery cells (Z) of an energy store (3) consisting of several battery cells (Z).