Abstract: A device for measuring the cell parameters of an entire storage battery having several series-connecter cells. A non-linear circuit is connected between each electric connecting point of the cells and a common measurement point. The non-linear circuits have known current-voltage characteristics which can be varied by an element connected between the common measurement point and an end pole or a selected connecting point of the entire battery. The parameters of the individual cells can be determined from the electric variables established at the common measurement point, for different values of the element, and the corresponding operating points of the individual non-linear circuits, as defined by the known current-voltage characteristics.

Abstract: A process for charging a multi-cell battery by the use of a battery recharging device and a device controlled by a microcontroller and containing a potential-free battery recharging device to analyze and optimize the charged state of a multi-cell battery, with a device for the switchable connection of selectable terminal voltages of battery sections or cells by means of a voltage measuring device. The microcontroller generates a charge current control signal for the battery recharging device which is calculated from the control algorithm of the microcontroller such that the voltage of the cell with the respectively highest terminal voltage is brought to and maintained at the level of a desired voltage value. Preferably the voltage threshold value is associated with the respective point in time of a characteristic charge curve recommended as being optimal for the type of cell used.