Device for controlling the charging and discharging of a storage battery

摘要

A device for controlling the charging and discharging of a storage battery has an input to which there is applied an input voltage proportional to the magnitude and sign of the current flowing through the battery. The input voltage is amplified and integrated to provide an integral which is an image of the state of charge of the battery. In this invention the input voltage is converted to a pulse train whose frequency is proportional to the magnitude of the input voltage and the pulses are added or subtracted according to its sign. The pulse total forms the said image of the state of charge of the battery.