Abstract: A storage battery of the conventional kind for supplying power to electrical devices has a supervising unit for determining the electric capacity. The supervising unit is electrically connected to terminal posts of the battery in order to measure the battery voltage and also measures the battery current. Measurement posts are connected to the end cells of the battery in parallel to the terminal posts and to the supervising unit through bridges. The supervising unit also measures the voltage between the measurement posts and the difference between the measured voltages is a measure of the current flowing through the battery, this difference voltage corresponding to a sum of the voltages over portions of the terminal posts and the bridges. From this difference voltage the current through the battery is calculated and therefrom the remaining electric capacity of the battery is determined by repeating regularly the measurement.

Abstract: A storage battery of the conventional kind for supplying power to electrical devices has a supervising unit (37) for determining the electric capacity. The supervising unit is electrically connected to terminal posts (19) of the battery in order to measure the battery voltage and also measures the battery current. Measurement posts (31) are connected to the end cells of the battery in parallel to the terminal posts (19) and to the supervising unit through bridges (34). The supervising unit (37) also measures the voltage between the measurement posts (31) and the difference between the measured voltages is a measure of the current flowing through the battery, this difference voltage corresponding to a sum of the voltages over portions of the terminal posts and the bridges (34). From this difference voltage the current through the battery is calculated and therefrom the remaining electric capacity of the battery is determined by repeating regularly the measurement.

Abstract: In a battery such as a starter battery for a motor vehicle semiconductor switches such as MOSFET-switches (11) are connected in parallel between the middle battery cells (7, 9). The switches (11) are controlled by a processor (15) which can receive signals from the exterior, such as rf-signals received by a receiver (25), for allowing a high but not too high current for powering a starter motor from the battery. In other cases only small currents can be drawn from the battery for powering a clock, illumination, etc. The processor also monitors the charge state and can block also small currents when there is too little charge left whereby also a sufficient charge can be left for starting the motor. The switches (15) are located inside the battery in a conducting contact with a metal plate, which is mounted directly on a terminal of one of the middle battery cells and which can be mounted against a bent cooling flange.

Abstract: A holder for holding electrode sets during the manufacture of an electric battery includes a pair of spaced partition holders and a pair of spaced wedge holders. The wedges are coplanar with the partitions and are wider than the partitions. The partition holders and wedge holders are movable toward one another to close around sets of electrodes disposed therebetween. The wedges continue to travel in overlying relation relative to said partitions to hold the electrode sets tightly. The partition holders carry blades which penetrate separator elements of the electrode sets and bear against the electrodes to center the latter. A plurality of holders can be interconnected so as to be driven by a common power source.