Trystan Casey
Electric vehicle (EV) fires are challenging to extinguish and pose unique problems for firefighters. While electric and hybrid vehicles catch fire less frequently than gas-powered cars, the fires can be difficult to put out and may take tens of thousands of gallons of water to extinguish. There are several methods to extinguish an EV fire, including the use of fire blankets, piercing nozzles, and submerging the vehicle in water. However, the most common approach is to simply wait for the battery to burn out and then extinguish the remaining fire. Firefighters must also be cautious of the high risk of injury or death associated with EV fires, especially when dealing with thermal runaway.
| Characteristics | Values |
|---|---|
| Firefighter strategy | Let the battery burn out, then extinguish remaining fire |
| Firefighter strategy | Submerge the vehicle in water |
| Firefighter strategy | Use piercing nozzles to deliver water inside the battery box |
| Firefighter strategy | Use fire blankets to envelop the vehicle |
| Firefighter strategy | Use a special hose nozzle to cool the battery cells |
| Firefighter strategy | Direct water into the battery pack |
| General strategy | Place the vehicle on a concrete surface, away from flammable materials |
| General strategy | Submerge the vehicle in water |
| General strategy | Use a Class D extinguisher |
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What You'll Learn
- Fire blankets can be used to envelop the vehicle, subduing toxic fumes and smoke
- Piercing nozzles can deliver large amounts of water to cool battery cells, but they are dangerous
- If the battery box is intact, it's best to wait for the battery to burn out and then extinguish remaining flames
- If the battery pack is torn open, direct water into the pack to cool the battery cells
- Anti-fire bags can be used to store devices to prevent fires
Fire blankets can be used to envelop the vehicle, subduing toxic fumes and smoke
Fire blankets are an effective solution to combat electric vehicle fires. They are large, heavy pieces of fire-resistant material designed to envelop burning electric vehicles and hybrids. Fire blankets are especially useful in high-risk locations such as gas stations, road tunnels, car parks, and passenger ferries, where a fire can quickly become a disaster.
Fire blankets can be used to envelop the electric vehicle, subduing toxic fumes and smoke. They are made from materials resistant to high temperatures and can endure the extreme heat produced by lithium-ion battery fires. Fire blankets are crucial safety devices that enhance safety by swiftly and effectively suppressing fires, protecting individuals and property. They also aid in environmental conservation by minimizing the emission of harmful chemicals and reducing water consumption.
To use a fire blanket, place it on the ground in front of or behind the vehicle and roll it out. Two people should each grab a handle and safely pull the fire blanket over the car in one continuous movement, ensuring it is tight all the way to the ground. It is important to note that the fire blanket should be left on when transporting the electric vehicle on a tow truck or until the vehicle has been moved to a safe place.
Fire blankets offer a rapid and efficient solution for managing electric vehicle fires. They can be used in conjunction with a special hose nozzle to cool down the battery cells. While single-use fire blankets can be costly, they provide a valuable tool for fire departments to combat the unique challenges posed by electric vehicle fires.
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Piercing nozzles can deliver large amounts of water to cool battery cells, but they are dangerous
Electric vehicle (EV) fires are considered immediately dangerous to life and health (IDLH) due to the risk of electric shock and toxic fumes. While EV fires are less frequent than those in gas-powered cars, they can be challenging to extinguish and may require tens of thousands of gallons of water.
One method to extinguish an EV fire is to use piercing nozzles, which are designed to puncture the battery box and deliver large amounts of water to cool the battery cells. This approach can be effective in mitigating fires in inaccessible areas, such as attics or void spaces.
However, piercing nozzles carry significant risks. Firstly, there is a danger of electrocution, especially if the EV is connected to a charging station. Piercing the battery compartment can also cause further mechanical damage and increase the risk of thermal runaway, worsening the situation. Additionally, crushing cells or shorting out electrical components inside the box can cause more battery cells to fail.
Furthermore, the placement of the piercing nozzle is critical. Many battery box structures have cross-car frame rails that cannot be penetrated. Sealed compartments within the box can also cause issues if the nozzle pierces the wrong area, potentially flooding unaffected compartments.
While piercing nozzles can deliver large amounts of water to cool battery cells, their use is hazardous and should be carefully considered. Alternative methods, such as using fire blankets or waiting for the battery to burn out, may be safer and more effective approaches to extinguishing EV fires.
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If the battery box is intact, it's best to wait for the battery to burn out and then extinguish remaining flames
If the battery box of an electric vehicle on fire is intact, it is best to wait for the battery to burn out and then extinguish the remaining flames. This is because attempting to extinguish the fire while the battery is intact can be dangerous and may not be effective.
Firstly, it is important to note that electric and hybrid vehicles catch fire less frequently than gas-powered cars. However, when they do, the fire can be challenging to extinguish and may take a long time, even several hours, and a large volume of water to put out.
If the battery box is intact, one option is to use a piercing nozzle to puncture the box and deliver large quantities of water inside to cool the battery cells. However, this method is hazardous due to the risk of electrocution and the possibility of crushing cells or shorting out electrical components, which could cause more battery cells to fail. NFPA and EV manufacturers advise against any attempts to access the inside of the battery box.
Another method is to use a fire blanket, a large, heavy piece of fire-resistant material designed to envelop the burning vehicle and subdue the flames, toxic fumes, and smoke. This method can be used in conjunction with a special hose nozzle to cool the battery cells from underneath. However, these methods may not be as effective as simply waiting for the fire to burn out.
Therefore, if there are no exposures and the battery box is intact, it is recommended to let the battery burn out, which should only take about an hour. This strategy may not be ideal for proactive firefighters, but it is the best approach. The alternative is to continually dump water on the vehicle for 6 to 8 hours.
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If the battery pack is torn open, direct water into the pack to cool the battery cells
If the battery pack of an electric vehicle is torn open, the best course of action is to direct water into the pack to cool the battery cells. This method has been proven safe and effective by firefighters who have successfully employed it to extinguish fires in electric vehicles involved in collisions.
It is important to note that this approach does not carry the risk of electrocution, unless the electric vehicle is still connected to an energised charging source. This is a crucial safety consideration that must be addressed before attempting to extinguish the fire.
While it is generally recommended to wait for the battery to burn out and then extinguish the remaining fire, this strategy is not ideal, especially for proactive firefighters. Directing water into the torn-open battery pack is a more efficient way to cool the battery cells and prevent the fire from spreading.
In addition to water, other cooling fluids can also be used. These include saltwater, as well as specialised fluids like those used in supercomputers. However, these specialised fluids are typically very expensive. It is worth noting that some products marketed to extinguish electric vehicle battery fires may not be effective and could potentially increase the risk to emergency responders. Therefore, it is essential to exercise caution and prioritise the safety of all individuals involved.
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Anti-fire bags can be used to store devices to prevent fires
Electric vehicles (EVs) are generally considered safe, but accidents can happen. When they do, the fire can take hours to extinguish and tens of thousands of gallons of water. Firefighters have a few options to tackle an EV fire. They can let the battery burn out and then extinguish the remaining fire, or they can dump water on the vehicle for 6 to 8 hours. In some cases, firefighters have been able to direct water into the torn-open battery pack to cool the battery cells directly. This method is safe unless the EV is connected to a power source.
Fire blankets are another option for subduing the flames and toxic fumes from an EV fire. These blankets are large, heavy pieces of fire-resistant material designed to envelop the burning vehicle. Fire departments have also started using special hose nozzles in conjunction with fire blankets to cool the battery cells.
To prevent fires, it is important to store devices properly. Anti-fire bags, such as the SentrySafe FBWLZ0 Fire Bag, can be used to store important documents, devices, and valuables, providing an added layer of protection. These bags are made of fire-resistant material and have fire-resistant stitching, offering four-layer protection. While these bags may not survive a significant structure fire, they can withstand brief fire exposure and keep interior temperatures safe. They are also water-resistant, protecting the contents from water damage, for example, from a sprinkler system. Anti-fire bags are a convenient way to store and protect important items, providing peace of mind and easy access in an emergency.
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Frequently asked questions
If your electric vehicle catches fire, the best thing to do is to put it on a concrete surface, away from anything flammable, and let the battery burn out. You can also try to submerge it in water, but this may not be possible or safe.
Fire services use a variety of methods to deal with electric vehicle fires, including fire blankets, piercing nozzles, and containment units. They may also choose to simply let the battery burn out, which can take up to an hour.
No, electric and hybrid vehicles catch fire less frequently than gas-powered cars. However, when they do catch fire, they can be more difficult to extinguish and may require a large amount of water.
There is no standard fire extinguisher that can effectively put out an electric vehicle fire. Fire blankets can be used to slow down the fire and prevent it from spreading, but they will not extinguish the fire completely.
