Abstract: In at least one embodiment, provided is a battery pack for a vehicle including a thin firebox for enclosing batteries and containing thermal runaway gases, thermal insulation surrounding the firebox, and a vent hole extending through the firebox and the thermal insulation to an exterior of the vehicle with 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.

Abstract: In at least one embodiment, provided is a battery pack for a vehicle including battery pack for a vehicle, the battery pack having a firebox for enclosing batteries, an electronics compartment, thermal insulation surrounding the firebox and the electronics compartment, and heat pipes. The heat pipes may include firebox heat pipes contacting the firebox on an evaporator end and extending to an exterior surface of the battery pack on a condenser end, and electronics compartment heat pipes extending from within the electronics compartment on an evaporators end and extending through the thermal insulation to the exterior surface of the battery pack on a condenser end.