US 11,658,363 B2
Battery for an aircraft
Johannes Roethinger, Harburg (DE); Manuel Kempf, Donauworth (DE); and Maximo Henares-Extremera, Augsburg (DE)
Assigned to AIRBUS HELICOPTERS DEUTSCHLAND GMBH, Donauworth (DE)
Filed by AIRBUS HELICOPTERS DEUTSCHLAND GMBH, Donauworth (DE)
Filed on Jun. 17, 2021, as Appl. No. 17/350,674.
Claims priority of application No. 20400018 (EP), filed on Oct. 15, 2020.
Prior Publication US 2022/0123409 A1, Apr. 21, 2022
Int. Cl. H01M 50/231 (2021.01); H01M 50/249 (2021.01); H01M 50/24 (2021.01); H01M 50/213 (2021.01); B64D 41/00 (2006.01); H01M 10/0525 (2010.01); H01M 10/054 (2010.01)
CPC H01M 50/231 (2021.01) [B64D 41/00 (2013.01); H01M 10/054 (2013.01); H01M 10/0525 (2013.01); H01M 50/213 (2021.01); H01M 50/24 (2021.01); H01M 50/249 (2021.01); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A battery for an aircraft, comprising:
a battery casing with a casing wall that forms an interior volume;
a plurality of battery cells that is arranged in the interior volume; and
a functional layer that is arranged at the casing wall between the plurality of battery cells and the battery casing, wherein the functional layer comprises an intumescent material that, in case of a breach of the battery casing, is adapted to ensuring flame containment within the interior volume and mitigation of uncontrolled heat and gas emission from the interior volume through the breach of the battery casing; and
a structural support layer that encloses the plurality of battery cells and separates the plurality of battery cells from the functional layer,
wherein the functional layer further comprises:
a fibrous mat that comprises the intumescent material, wherein the fibrous mat remains evenly distributed in a predetermined arrangement between the structural support layer and the casing wall in case of an exposure to a temperature that is below a predetermined threshold, and wherein the fibrous mat is free to move between the structural support layer and the casing wall in case of an exposure to a temperature that is equal to or above the predetermined threshold.