Patent ID: 9281714
Filing Date: 2016-03-08
CPC Classification: H02J

Claim Text:
1. An uninterruptible power system comprising: a plurality of uninterruptible power units each including a rechargeable battery, a charging circuit configured to charge the rechargeable battery using input power, and an output circuit configured to output power stored in the rechargeable battery in place of the input power when supply of the input power stops, the uninterruptible power units being connected in parallel to the input power; a path switching unit configured to perform switching of a path for power received among the charging circuit, the rechargeable battery and the output circuit in the plurality of uninterruptible power units; and a control unit configured to control the path switching unit so that switching of the path is performed according to states of the uninterruptible power units, wherein the control unit controls the path switching unit to switch to a path via which rapid charging of the rechargeable battery that is a charging target, whose remaining amount is smaller than or equal to a first threshold amount, is performed by the charging circuit in the uninterruptible power unit including the rechargeable battery that is the charging target, as well as by the charging circuits of the uninterruptible power units other than the uninterruptible power unit including the rechargeable battery that is the charging target, and wherein the control unit controls the path switching unit to switch to a path via which slow charging of the rechargeable battery that is a charging target, whose remaining amount is greater than or equal to a second threshold amount, is performed by the charging circuit in the uninterruptible power unit including the rechargeable battery that is the charging target, the second threshold amount being greater than the first threshold amount.