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    • Fire protection curtains

      Fire protection curtains

      In case of fire, fire protection curtains close wall and ceiling openings. Their construction (roll-down or folding technique) and the use of different fabrics provide for a wide range of applications as well as different protection goals, classifications and time classes. The casing and guide rails of the highly flexible systems blend almost invisibly into the building and allow plenty of scope for sophisticated architecture and open room concepts.

    • Conveyor system closures

      Conveyor system closures

      Various production and logistics processes call for the most diverse types of conveyor systems. If these conveyor lines pass through fire-retardant or fire-resistant walls or ceilings, the openings required for this purpose must be provided with fire protection closures to prevent the spread of fire through the conveyor system or the goods conveyed. In the event of fire, conveyor system closures (CSC for short) must close these openings immediately and automatically. Fire resistance classified according to DIN EN 13501-2 is just as important as the smooth clearance of the closing areas in the event of a fire.

    • Smoke curtains

      Smoke curtains

      A smoke apron is a part of a smoke control system which also includes other components such as natural smoke and heat exhaust ventilators (EN 12101-2) and mechanical smoke and heat exhaust ventilators (EN 12101-3). Smoke aprons restrict the movement of combustion gases within a building in case of fire.

    • Smoke protection curtains

      Smoke protection curtains

      Once closed, smoke protection curtains (SPC) restrict the passage of smoke during the phase of fire formation, so that in the event of a fire, there is enough time to rescue people and animals from the room behind the curtain and to recover material assets without the need for respiratory equipment.

    • Tube sealings

      Tube sealings

      The solution for issues with fire protection dampers in ventilation and air conditioning systems in conveyor processes. Stöbich offers fire protection for pneumatic conveyor lines the closing elements of which are not exposed to the flow of conveyed material. This way, the closing element cannot be damaged or contaminated by abrasive conveyed goods.

    • Control units

      Control units

      Each automatic fire protection system needs a control unit. They are critical to safety, because a failure of this function means that the entire investment into a fire protection sealing has been in vain. Control units coordinate both fire detection and interaction with other control units, such as higher-level building control systems or clearing of the closing area of conveyor system closures.

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Fire protection for electricity storage systems

Fire protection for electricity storage systems

Fire protection for electricity storage systems

Lithium-ion batteries, cells and rechargeable batteries power electric cars, e-bikes, e-cigarettes, smartphones and more. Compared to other battery technologies, these special energy storage devices have a particularly high energy density.

In principle, lithium-ion technology is safe, but under certain circumstances, the batteries can fail, i.e. explode. In such a case, violent reactions occur in the form of fires, during which toxic and corrosive harmful gases are emitted. The high temperatures can also be dangerous for people and property.

We would like to clarify the possible causes and present our safe transport and storage solutions for lithium-ion batteries from the product series StrainBox.

Even a single small button cell in residual waste can trigger a major fire, e.g. from a carelessly discarded music greeting card. As the ➥ FAZ reports, fires worth millions occur time and again in waste disposal companies. This is why it is so important to always dispose of batteries and rechargeable batteries properly.

Why do batteries fail?

Lithium-ion batteries can self-ignite under certain conditions. In this case, we speak of an accident or thermal runaway - the battery overheats and "thermally burns out". The reasons for this can come from outside (external) or from the battery itself (internal), through a self-reinforcing heat-producing process.

  • Mechanical damage

    E.g. after a fall with the e-bike, battery dropped, etc.

    Deformation of a cell or penetration of a foreign object into the cell can cause damage to the separator*, which in turn leads to an internal short circuit.

  • Thermal effect

    E.g. externally due to an environmental fire, solar radiation or failure of a cooling system.

    Internally, so-called thermal propagation (= spreading) can occur from cell to cell - a dangerous chain reaction.

  • Chemical ageing

    Accelerated in particular by deep discharges.

    The metallic lithium is unevenly distributed in old cells; crystals grow at certain points. These so-called dendrites can penetrate the separator and lead to an internal short circuit.

  • Electrical impact

    E.g. due to overcharging (internal) or short-circuiting (external).

    In the case of overcharging, the electrical energy can no longer be converted into chemical energy at some point. A short circuit results in a high current flow. Both lead to the cell heating up.

    * The separator is the inner separating layer between the anode and cathode, which is intended to prevent uncontrolled charge exchange.

    What happens during a thermal runaway?

    It can happen that quickly: A battery ignites within a few seconds. We regularly carry out fire tests with lithium-ion batteries under real conditions in the test centre at the STÖBICH North site. In the short video you can see the four different stages of a classic battery fire.

    • The cell heats up and pressure is built up.

    • Electrolytes escape in the form of toxic noxious gases.

    • Sparks and flames escape.

    • The harmful gases ignite.

      Tested in the test centre

      As part of our product development, we regularly check the safe function of our storage and transport boxes. We also support customers in planning, carrying out, documenting and analysing their own tests. The tests take place in our in-house battery test centre, where products for the safe handling of lithium-ion batteries are tested in addition to battery tests.

      ADR: Legal regulation for battery transport

      Our transport boxes must be ADR-compliant, i.e. approved for the safe transport of dangerous goods by road: in accordance with the Agreement concerning the International Carriage of Dangerous Goods by Road (ADR).

      Burning electric cars are a regular topic in the media. There is often talk of a "technical defect" as a possible cause of the fire, such as the ➥ fire in an electric post office vehicle in Pirmasens.. Whether it is a battery fire can usually only be clarified later in the course of the investigation. Due to the potential danger described above, a connection between the energy storage system and the fire is relatively likely.

      What to do with the damaged battery?

      Even after a battery fire has been extinguished, the danger is far from over: What to do with the contaminated extinguishing water and the defective energy storage unit itself? The legal situation is not clear, and fire brigades are not officially responsible for the transport and disposal of damaged batteries. Nevertheless, the fire service can keep battery safety systems on hand for use - which makes sense given the increasing number of fires involving modern battery technologies.
      We at STÖBICH have handed over several StrainBoxes to the Goslar fire service. For space reasons, we store the largest StrainBox XL transport box on our factory premises. If required, the emergency services of all fire brigades in the district of Goslar can transport the box to the scene of the emergency using the "Logistics" equipment vehicle (GW-L).

      Demonstration on the premises of the fire brigade technical centre in Goslar: The StrainBox XL is prepared for transport by the fire brigade in an exercise. © Uwe Fricke
      These ➥ CirruX packaging bags are prescribed for the ADR-compliant transport of lithium-ion batteries. © Uwe Fricke

      In BRANDSchutz/Deutsche Feuerwehr Zeitung (issue 09/2022, p. 812 ff.), District Fire Chief Uwe Fricke explains the key advantages of these special transport boxes for firefighting operations: they are available in various sizes from XS for e-bike batteries to XL for photovoltaic storage units, and they are designed for dry transport. This means that the battery does not have to be extinguished (keyword "contaminated extinguishing water"), but can burn out in the box.

      Safe transport solutions for energy storage systems

      All boxes in the StrainBox series have an integrated filter system that filters out a large proportion of the toxic gases. Harmful dust and particles are retained and the escape of solids, liquids and flames is prevented. Thanks to the integrated thermal management system, there is no critical temperature increase in the outer walls. Should the batteries inside break down, contamination in the area surrounding the box is prevented.


      Gas filter systemMechanical resistance
      No leakage of sparks and flamesAlso for critical and defective lithium-ion batteriesbatteries
      Pressure-resistant constructionTested overall concept
      No leakage of liquids and solidsSafe and durable locking mechanism

      Click here for the innovative ➥ Battery safety solutions from STÖBICH.