Patent ID: 9209639
Filing Date: 2015-12-08
Classification: G08B,H01M,H02J,H02M,Y02E,Y02P

Abstract:
1. A storage battery system comprising: electric storage units connected with a common direct current (DC) bus in parallel, and each including at least one storage battery; and voltage conversion units, each provided between one of the electric storage units and the DC bus, for controlling amounts of charge in and amounts of discharge from the electric storage units, wherein each of the voltage conversion units includes: a voltage sensor for detecting a voltage value at a connection point between the DC bus and the voltage conversion unit; a communication unit configured to communicate with the other voltage conversion units; an obtainment unit configured to obtain, via the communication unit, voltage values detected by the voltage sensors of the other voltage conversion units; and a control unit configured to, when a difference value between (i) a statistic of the voltage values obtained by the obtainment unit and (ii) the voltage value detected by the voltage sensor is not less than a predetermined threshold value, approximate the voltage value detected by the voltage sensor to a predetermined target value by changing an amount of charge in and an amount of discharge from a corresponding one of the electric storage units.