The present disclosure provides a method of discharging a battery, comprising the steps: applying an initial discharge current to the battery, and repeatedly modifying the discharge current according to a predetermined schedule, so that the battery is main...

The charging current value in the first trickle charge after the rapid charge is differentiated from the charging current value in the second and subsequent trickle charge. Thus, for example, in the first trickle charge, charging can be performed with the ...

A sodium-sulfur battery belongs to each of a plurality of operation units. An operation unit is a unit of paralleling in and paralleling off the sodium-sulfur battery to and from a grid. A first power consuming body and a second power consuming body are el...