The invention relates to an open-loop and/or closed loop control system (1) for a secondary battery (3). Each cell electronics unit (4) is configured to detect a respective state of the battery cell (2), to generate a state parameter assigned to the respectively detected state, to weight, with the respective state parameter, a value of a probability of the battery cell (2) being switched on and to control the state of the battery cell (2) as a function of the respective control signal and the value, weighted with the respective state parameter, of the probability of the battery cell (2) being switched on. A control signal contains at least one information item according to which the values, stored in the cell electronics units (4), of the probability of the respective battery cell (2) being switched on are retained, incrementally increased, incrementally reduced or reset to a predefined output value.