Danger of electrocution and fire from high voltage systems in electric and hybrid electric vehicles is mitigated by isolating high voltage electric power sources, of vehicles involved in accidents, in a sealed enclosure.It involves the use of voltage disconnect devices to rapidly, manually or automatically disconnect and isolate the vehicle energy storage devices from the electrical system of the vehicle with ease and safety. The electrical power source may be a battery, a battery pack, a capacitor or other device which may be used to store electrical energy onboard a vehicle.