A non-sealed apparatus for batteries with a containment structure for gasses that includes a battery enclosure with an upper portion and a lower portion. The apparatus further includes a plurality of batteries disposed in a lower portion of the battery enclosure. The apparatus has at least one battery containment structure disposed in an upper portion of the battery enclosure, which is configured to move downward thereby sealing the plurality of batteries upon a condition. Further, a transfer channel assembly is provided within the battery enclosure and configured to transfer and/or contain gases emitted by the plurality of batteries upon the condition. The apparatus also has at least one fan configured to circulate the air in and out of the battery enclosure through the first perforated opening and the second perforated opening.