Controlling method of charging and discharging device

A controlling method of a charging and discharging device, using a charging and discharging device including a plurality of units, wherein the units include a plurality of chambers accommodated in the units, wherein the chambers include a plurality of channels accommodated in the chambers, and wherein the channels charge or discharge secondary batteries, comprising:

• selecting a plurality of channels, each of which is connected to a secondary battery;
• and
• charging-and-discharging each of the secondary batteries connected to the selected plurality of channels,
• wherein the selecting a plurality of channels includes selecting the plurality of channels in a same unit, and
• wherein the charging-and-discharging includes:
• first charging for fully charging all secondary batteries connected to the plurality of channels at a first temperature;
• first standing for allowing all the secondary batteries connected to the plurality of channels that have completed the first charging to stand at a second temperature;
• first discharging for fully discharging all the secondary batteries connected to the plurality of channels that have completed the first standing, at the second temperature;
• second standing for allowing all the secondary batteries connected to the plurality of channels that have completed the first discharging to stand at a third temperature;
• and
• second charging for fully charging all the secondary batteries connected to the plurality of channels that have completed the second standing, at the third temperature,
• wherein each step of the charging-and-discharging is simultaneously initiated in the plurality of channels.