US 11,990,593 B2
Battery pack design and method
Peter Delioussine, Newbury Park, CA (US); and Brian Jensen, West Hills, CA (US)
Assigned to SoftBank Corp., Tokyo (JP)
Filed by SoftBank Corp., Tokyo (JP)
Filed on Oct. 25, 2021, as Appl. No. 17/452,068.
Application 17/452,068 is a continuation of application No. PCT/US2020/029971, filed on Apr. 24, 2020.
Claims priority of provisional application 62/898,543, filed on Sep. 10, 2019.
Claims priority of provisional application 62/854,711, filed on May 30, 2019.
Claims priority of provisional application 62/838,926, filed on Apr. 25, 2019.
Claims priority of provisional application 62/838,783, filed on Apr. 25, 2019.
Prior Publication US 2022/0045385 A1, Feb. 10, 2022
Int. Cl. H01M 10/625 (2014.01); H01M 10/6552 (2014.01); H01M 10/658 (2014.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01); H01M 50/308 (2021.01)
CPC H01M 10/625 (2015.04) [H01M 10/6552 (2015.04); H01M 10/658 (2015.04); H01M 50/204 (2021.01); H01M 50/249 (2021.01); H01M 50/308 (2021.01); H01M 2220/20 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A battery pack for a vehicle, the battery pack comprising:
a thin firebox for enclosing batteries and containing thermal runaway gases;
thermal insulation surrounding the firebox;
a vent hole extending through the firebox and the thermal insulation to an exterior of the vehicle;
a vent hole plug; and
a pressure relief frangible vent cover at least partially covering the vent hole plug to retain it within the vent hole, wherein
the pressure relief frangible vent cover comprises:
a frangible flexure comprising a vent plug cover portion and a weakened region; and
a pad portion surrounding the frangible flexure, the pad portion being separated from the vent plug cover portion by a gap between the vent plug cover portion and the pad portion, the pad portion being connected to the frangible flexure by the weakened region.