Why Standard Extinguishers Struggle With EV Car Battery Fires

Why Standard Extinguishers Struggle With EV Car Battery Fires

Let's start with perspective: electric vehicles are not fire-prone. EV FireSafe — a private research body funded by the Australian Department of Defence — had verified 772 high-voltage battery fires worldwide as of October 2025, roughly one in 100,000 of the 78 million plug-in EVs on the road (National Roads and Motorists' Association, 2026). In Australia, only around 13 EV battery fires had been recorded since 2021 (National Roads and Motorists' Association, 2026). The point of this post isn't fear — it's that when a battery fire does happen, it behaves unlike anything a conventional extinguisher was built for.

Thermal runaway, briefly

An EV pack fire usually begins with thermal runaway: a single cell is damaged, short-circuits and heats until it bursts above roughly 170°C, then ignites and cascades into neighbouring cells (Allianz Australia, n.d.). Because the reaction produces its own heat and oxygen, dousing or smothering the surface does not reliably stop it — UL's Fire Safety Research Institute has shown that traditional suppression approaches simply aren't as effective on EVs as on petrol cars (UL Research Institutes, n.d.). That's also why emergency crews often use large volumes of water to cool a pack rather than try to "put it out", and why reignition hours later is a real risk.

What this means for owners

You are not expected to extinguish an EV battery fire. Your job is early detection, containment, evacuation and calling 000. The equipment you keep on hand should support that goal:

  • An 4L EV fire extinguisher — manufactured to EN 3-7:2004/A1:2007 — can help cool and knock down flames in surrounding materials and during the earliest stage of an incident, before a pack is fully involved.
  • An EV car fire blanket is a containment tool: it helps confine flames, limit spread to other vehicles or structures, and reduce radiant heat and debris while crews are en route. Our blanket materials carry EN 13501 reaction-to-fire classification.

We're deliberately careful with language here: neither product is a certified means of "extinguishing" a battery in full thermal runaway. They are control and containment layers that buy time and protect surroundings.

Most Australian EV fires aren't the EV's fault

It's worth knowing the local pattern. Of the verified Australian EV car battery fires analysed up to early 2025, several were caused by exposure to another fire (including home garage fires and arson) rather than a fault in the car itself, with only one connected to charging at the time (Vehicle Emissions Star Rating, 2025). That's a strong argument for treating your garage as a fire-safe zone and keeping containment equipment where you park and charge. Browse the full range of EV fire blankets to match your vehicle.

If your EV catches fire: Don't try to fight a fully involved pack. Move clear of toxic smoke, keep others back, and call 000 — tell them it's an electric vehicle so crews arrive prepared.

References

  1. Allianz Australia. (n.d.). What is thermal runaway in EVs? https://www.allianz.com.au/car-insurance/articles/thermal-runaway-evs.html
  2. National Roads and Motorists' Association. (2026). Understanding electric vehicle fires: A comprehensive guide. https://www.mynrma.com.au/open-road/advice-and-how-to/understanding-electric-vehicle-fires
  3. UL Research Institutes. (n.d.). Fire safety of batteries and electric vehicles. Fire Safety Research Institute. https://fsri.org/research/fire-safety-batteries-and-electric-vehicles
  4. Vehicle Emissions Star Rating. (2025, January 23). Essential information about electric vehicle (EV) fire safety. https://www.vesr.gov.au/news/essential-information-about-electric-vehicle-ev-fire-safety
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