Technical information

the high-voltage battery. When extinguishing the fire, audible processes can occur inside the high-voltage battery. This
takes place in the safety valves of the battery cells. This process is no source of danger. These audible processes can
also occur after extinguishing the fire.
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3.2.2 Determine de-energised state at burned down vehicle
There may still be electrical hazard potential after the fire. The insulation of the high-voltage cables can be damaged or
even removed by the heat.
In this case, the vehicle may only be approached when wearing personal protecting equipment.
After the fire has been extinguished, any high-voltage cables must be disconnected from the high-voltage battery, if they
are accessible. Therefore, the copper lines are to insulated against each other and to be cut through one by one in order
to prevent a short circuit. Afterwards, a short circuit to ground should be checked.
Note: The high-voltage cables can be recognised from their much larger cross-section. If the insulation has melted due to
the fire, only the copper wires can be identified.
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Position of the high-voltage components
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3.2.3 Procedure for fire residues of vehicle
Personal protective equipment must be used when disposing of fire residues.
In case of fire, the high-voltage battery can bond to the roadway due to the high temperature. In this case, no metallic
objects may be used to remove the high-voltage battery from the roadway. Since the carbon fibre structure no longer
provides any strength, the vehicle needs to be lifted directly beneath the high-voltage battery. Lifting via the wheels does
not help. The drive unit (front/rear axle) would disconnect from the life module.
The residues of the vehicle should be removed from the roadway using pointed wedges made of insulating material (for
example wood). Afterwards, the high-voltage battery must be supported using insulating material in order to feed through
the lifting sling. If a forklift truck is available, it can be used to lift the high-voltage battery (with insulating support between
the high-voltage battery and the truck) and the vehicle.
The residues of the vehicle can be lifted onto a truck with insulation on the loading platform and then covered with an
insulating cover. A corresponding high-voltage identification (warning sticker) must be attached.
First recovery of the vehicle with damaged high-voltage battery is secured by law.
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3.3 Vehicle in and under water
- BGI/GUV-I 8677 governing electrical hazards at fires
- Observe the following safety distance when extinguishing
1 m - spray jet
5 m - full jet
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