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    • mesastou
      mesastou @mesastou last edited by

      Από chatGTP:

      For a Battery Electric Vehicle (BEV), it’s recommended to have a fire extinguisher suitable for lithium-ion battery fires, as well as general vehicle fires. The following types are most appropriate:
      1. Class D Fire Extinguishers: Specifically designed for fires involving flammable metals (including lithium). However, they are not commonly available for vehicle use and can be expensive.
      2. Multipurpose Dry Chemical Fire Extinguisher (Class ABC): These are versatile and can handle fires involving combustible materials (Class A), flammable liquids (Class B), and electrical equipment (Class C). While they won’t extinguish a lithium-ion battery fire completely, they can help control it and prevent it from spreading.
      3. Clean Agent Fire Extinguishers: These use gases like Halotron or CO2 to suppress fires and are effective for electrical and engine fires. However, they are not suitable for lithium battery thermal runaway fires.
      4. Lithium Fire Extinguishers (Specialized): These extinguishers, such as those containing Aqueous Vermiculite Dispersion (AVD), are specifically made for lithium-ion battery fires and are highly recommended for BEVs.

      Recommendation:
      • For general preparedness in a BEV, a Class ABC extinguisher is practical and widely available.
      • If you want to be specifically prepared for lithium-ion battery thermal runaway, consider an AVD extinguisher or similar specialized product.

      Also, always prioritize safety. If a battery fire occurs, evacuate and contact emergency services immediately, as battery fires can reignite even after being extinguished.

      mouths are for eating, noses for breathing.

      1 Reply Last reply Reply Quote 0
      • mesastou
        mesastou last edited by

        Lithium iron phosphate (LFP) batteries are considered among the safest types of lithium-ion batteries, with a significantly lower risk of fire or thermal runaway compared to other lithium battery chemistries (like NMC or NCA). Here’s why:

        Why LFP Batteries Are Safer
        1. Thermal Stability:
        LFP batteries have a more stable chemical structure. They are less likely to overheat, even under high temperatures or overcharging conditions.
        2. Lower Energy Density:
        While this means slightly less range for electric vehicles compared to other chemistries, it also makes them less prone to fire hazards as they store less energy in the same volume.
        3. Resistance to Overcharging:
        LFP batteries can tolerate overcharging and deep discharging better, reducing risks associated with improper use.
        4. Non-Toxic Materials:
        The cathode material (iron phosphate) is less reactive than the cobalt or nickel used in other lithium-ion chemistries, minimizing the chances of catastrophic failure.
        5. Slower Thermal Runaway:
        Even if a thermal runaway event begins (e.g., from physical damage or a short circuit), the reaction propagates more slowly and less violently compared to NMC or NCA chemistries.

        Risk Assessment for LFP Batteries
        • Fire Risk: Very low under normal conditions. Most incidents involving EV battery fires occur with NMC or NCA batteries.
        • Key Risks: Like all lithium-ion batteries, LFP batteries can still catch fire due to extreme damage (e.g., severe crash), manufacturing defects, or exposure to extreme heat for prolonged periods. However, such events are rare.
        • Overall: If your BEV uses an LFP battery, the risk of a fire or thermal runaway is minimal, especially with proper vehicle maintenance and adherence to manufacturer guidelines.

        Should You Worry?

        For daily use and safety, the fire risk with LFP batteries is negligible compared to other battery types. However, having a small fire extinguisher (like a Class ABC or AVD extinguisher) is still a good precaution, not just for battery fires but for any type of fire in the vehicle.

        mouths are for eating, noses for breathing.

        1 Reply Last reply Reply Quote 0
        • k-m
          k-m last edited by

          Τα ηλεκτρικά δεν σβήνουν. Αξιωματικός της πυροσβεστικής σε εκπαίδευση μας, μας ειπε οτι απλα τα αφηνουν να καουν γιατι θα έπρεπε να εχουν τεραστιες ποσότητες νερου για να καταφερουν να το σβησουν. Για αυτό και σε πλοια δεν τα ηθελαν ή εβαλαν τωρα οτι η μπαταρία πρέπει να ειναι στο 40 ή 60 % το πολυ.

          Για συμβατικό αυτοκίνητο εγω εχω 2 μονοκιλους κατω απο τα ποδια οδηγου και συνοδηγού.

          Πισω κατω απο 2 βαλιτσες και 3 σακουλες κτλ, αντε να τον βρεις αν γινει κατι.

          1 Reply Last reply Reply Quote 2
          • k-m
            k-m last edited by k-m

            540d5c8e-d8ec-49a8-a310-818b016c1587-image.png

            και βρηκα και αυτο που λεει για εναν αλλα με βάσει κατασβεστική ικανότητα

            https://www.dsanet.gr/Epikairothta/Nomothesia/ya50292_09.htm

            1 Reply Last reply Reply Quote 0
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