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 |
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.
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