| CPC B65D 51/1638 (2013.01) [B65D 7/045 (2013.01); B65D 25/14 (2013.01); B65D 25/34 (2013.01); B65D 51/18 (2013.01); B65D 79/0087 (2020.05); B65D 85/68 (2013.01); B65D 2251/0018 (2013.01); B65D 2251/0031 (2013.01); B65D 2251/0093 (2013.01); B65D 2585/88 (2013.01); B65F 2240/108 (2013.01)] | 13 Claims |

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1. A drum for transporting and/or storing batteries, comprising:
a drum body;
an internal storage space inside the drum body, the storage space having a volume; and
a lid to close off the storage space,
wherein the lid is provided with two or more groups of openings for venting gas from the storage space to the atmosphere, in which a first group of openings is present on a top plate positioned above a bottom plate, and a second group of openings is present on the bottom plate adjacent to the drum body's internal storage space, and wherein a sheet of foil covers the first group of openings of the two or more groups of openings, wherein the sheet of foil is attached to the lid completely around the first group of openings; and
a layer of gas-permeable flame-retardant material extends across each of the two or more groups of openings,
wherein the sheet of foil has a first partial surface with which the sheet of foil is attached to the lid, wherein the sheet of foil has a second partial surface which is completely surrounded by the fire t partial surface, the second partial surface having a perimeter C and an area A, wherein the lid of the drum is circular with a diameter (D) of 0.45 m or less, wherein (A/C)>0.035 m.
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