MÜLLER SAFETY BOX
The Müller Safety Box (also known under the name AB Hochvolt) enables the safe transportation of damaged electric vehicles. At the same time, it meets the highest standard (according to German VDA recommendations) for equipping quarantine areas for high-voltage vehicles. The Müller Safety Box meets fire resistance class F90 (fire resistant) according to DIN 4102-2. The six-metre-long rolling container can be hitched onto an interchangeable-body truck using a hook lift. It can also be loaded onto platform vehicles and trailers. The Safety Box can be placed on the carrier vehicle using a forklift by means of the attached forklift guides. 
Damaged vehicles are pulled into the container using a cable winch attached to the carrier vehicle. For this purpose, an extra bulkhead fitted with a fairlead for feeding through the towing cable is installed at the front end of the box. It is also possible to steer drivable electric vehicles into the Safety Box or to load them by crane. The top of the box can be opened vertically by means of a hand-operated container winch. A loading ramp is mounted at the rear, which is spring loaded for easy opening and closing by hand.
The roof is completely made of sheet steel. The sides of the loading space are covered by a non-combustible tarpaulin made of stainless steel-reinforced glass fabric (EN 13501-1: A2-s1, d0). The tarpaulin material can withstand temperatures of up to 1,100 °C. Thanks to the silicone coating on both sides, the protective tarpaulin is weatherproof, watertight and airtight up to 250 °C. The material is resistant to a multitude of alkalis, acids, oils and solvents. If the batteries are ignited while transporting a damaged electric vehicle, the fire is contained inside the Müller Safety Box.
Either dry extinguishing granulates or extinguishing water can be used for the extinguishing process. The dry extinguishing agent Extover® has proven to be very efficient in everyday use. Its ease of use and rapid extinguishing effect have been particularly well received by emergency services on site. The box can also be flooded with water up to a height of 700 mm. For standard cars and small vans, this water level is sufficient to completely cover the built-in lithium batteries. A Storz A fixed coupling is attached to the outside of the high-voltage roll-off container for filling.
