US 12,362,414 B2
Battery pack with airgap sizing for preventing ejecta debris clogging
Sam Wagner, South Burlington, VT (US); and Nathan Goldsberry, South Burlington, VT (US)
Assigned to BETA AIR LLC, South Burlington, VT (US)
Filed by BETA AIR, LLC
Filed on Mar. 15, 2024, as Appl. No. 18/606,206.
Application 18/606,206 is a continuation of application No. 17/966,798, filed on Oct. 15, 2022, granted, now 11,967,693.
Prior Publication US 2024/0222742 A1, Jul. 4, 2024
Int. Cl. H01M 10/6557 (2014.01); H01M 10/04 (2006.01); H01M 10/6551 (2014.01); H01M 10/6564 (2014.01); H01M 50/317 (2021.01); H01M 10/613 (2014.01); H01M 10/625 (2014.01)
CPC H01M 10/6557 (2015.04) [H01M 10/04 (2013.01); H01M 10/6551 (2015.04); H01M 10/6564 (2015.04); H01M 50/317 (2021.01); H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 2220/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A battery pack for an electric vehicle, the battery pack comprising:
a battery module including a plurality of battery cells, each battery cell having a cylindrical surface and opposite first and second ends;
a firewall configured to intercept ejecta debris from the battery cells, wherein the firewall includes an ablative layer configured to ablate and detach as ablative material from the firewall when contacted by ejecta debris;
an airgap extending between the ablative layer of the firewall and the first ends of the plurality of battery cells and configured to receive a first portion of the ejecta debris flowing between the battery cells and the ablative layer, and to receive ablative material detached from the ablative layer;
an ejecta vent configured to vent the ejecta debris and the ablative material; and
a headspace defined in the battery pack and adjacent at least a portion of the cylindrical surfaces of the plurality of battery cells, the headspace sized to accommodate a second portion of the ejecta debris and ablative material flowing from the airgap to the ejecta vent.