LITHIUM ION BATTERY FIRE:
HOW TO EXTINGUISH IT?
Controlling electric vehicle fires: challenges and solutions
Introduction :
Electric vehicles, powered by lithium ion batteries, represent a revolution in the automotive sector. However, these same batteries, if subjected to extreme conditions or manufacturing faults, can be the source of spectacular fires that are difficult to control.
The lithium ion battery is at the heart of this problem. A lithium ion battery fire has specific characteristics that distinguish it from traditional fires. The chain reaction that occurs during a thermal runaway, the production of flammable gases and the difficulty of extinguishing them make these fires a real challenge for fire-fighters.
In this context, it is essential to understand the mechanisms at work during such an event in order to implement effective extinguishing strategies and limit the risks.
Lithium ion battery fire: Combating thermal runaway
Thermal runaway of a lithium ion battery is a chain reaction that can quickly degenerate into a fire. Lowering the temperature of a battery on fire is therefore essential. Cooling slows down the reaction, limits the production of flammable gases and reduces the intensity of the flames. Without rapid, effective intervention, the fire can spread rapidly, endangering people and property.
On this page, we explore the different methods used to cool batteries in the event of a fire, as well as the latest advances in extinguishing technology. We’ll also look at regulatory issues and the preventive measures to be implemented to ensure the safety of electric vehicles.
Lithium ion battery fire: extinguishing techniques
Extinguishing fires involving lithium-ion batteries requires special techniques. Immersion in water, though simple, can provoke violent reactions. Traditional extinguishing agents are often ineffective. To control this type of fire, fire-fighters use specially designed extinguishing agents, capable of rapidly cooling the battery and forming a protective barrier. Thermal blankets are also used to insulate the battery and slow the spread of heat. However, as we shall see, blankets alone are not sufficiently effective. More and more electric vehicles are equipped with built-in fire extinguishing systems, activated automatically when a fire is detected.
Finally, we’ll look at the specific risks associated with electric vehicle fires, such as smoke toxicity and the dangers to responders.
Conclusion:
Controlling electric vehicle fires is a major challenge for road safety and the energy transition. By understanding the mechanisms behind these fires and developing appropriate solutions, we can minimize the risks and guarantee the safety of electric vehicle users.
Lowering the temperature during an electric car fire is crucial for several reasons:
- Limiting thermal runaway: Lithium-ion batteries used in electric vehicles are susceptible to thermal runaway if subjected to excessive heat. Thermal runaway is a chain reaction that can rapidly increase battery temperature, produce flammable gases and intensify fire. Cooling the battery considerably reduces the risk of thermal runaway.
- Reduced production of flammable gases: The intense heat generated by a battery fire can break down electrolytes and produce flammable gases such as hydrogen. Lowering the temperature reduces the production of these gases, and therefore the risk of explosion.
- Easier extinguishing: A cooler fire is easier to extinguish. By reducing the temperature of the battery, we reduce the intensity of the flames and facilitate the action of the extinguishing agents.
- Responder protection: Cooling the battery reduces the risk of splashing molten material and protects firefighters from burns.
Methods used to cool lithium ion batteries in the event of fire include:
Methods used to cool batteries in the event of fire include:
- Immersion in water: This method is often used, but has the disadvantage of provoking violent exothermic reactions on contact with water.
- Use of specific extinguishing agents: Some extinguishing agents are specially designed to cool batteries and form a protective barrier.
- Thermal blankets: These insulate the battery and slow the spread of heat.
- Aerosols: Combining a vehicle fire blanket with gaseous aerosols gives good results.
- Water fog: Increasingly used by firefighters, water fog has proven its effectiveness.
In short, cooling a burning battery is an essential step in controlling the fire and limiting the risk to people and property.
Techniques for extinguishing electric vehicle fires
Electric vehicle fires present specific challenges due to the nature of lithium-ion batteries. Traditional extinguishing methods are not always effective, and can even make the situation worse. Here are some of the techniques used by firefighters:
-
- Water immersion: Although this method may seem intuitive, it is not always recommended, as water can react violently with some lithium-ion batteries, causing an explosion.
- Use of specific extinguishing agents: Some extinguishing agents, such as special dry powders or synthetic foams, are designed to smother flames and cool the battery. These agents are generally more effective than water and less likely to cause violent reactions.
- Prolonged cooling: Once the flames have been brought under control, it is essential to cool the battery for an extended period to prevent any recurrence. This may require the use of large quantities of water or specialized cooling systems.
- Containment: In some cases, firefighters may decide to contain the burning vehicle in a special container filled with water or another extinguishing agent. This method helps to control the fire and limit damage to the environment.
Specific risks associated with electric vehicle fires
- Thermal runaway: As mentioned above, lithium-ion batteries can undergo thermal runaway, a chain reaction that leads to a rapid rise in temperature and the production of flammable gases.
- Fume toxicity: The fumes released by a battery fire may contain toxic substances such as heavy metals and volatile organic compounds.
- Fire duration: Electric vehicle fires can last longer than gasoline vehicle fires, due to the nature of the battery.
- Risks for responders: Firefighters are exposed to specific risks, such as burns, poisoning and explosions.
The challenges of firefighter training
Faced with these challenges, it is essential to train firefighters in intervention techniques specific to electric vehicle fires. This training must cover :
- Recognizing the signs of a battery fire: Firefighters need to be able to quickly identify a burning electric vehicle and assess the risks.
- Suitable extinguishing techniques: They must master the different extinguishing methods and know how to choose the most appropriate technique for the situation.
- Safety measures: Firefighters must be equipped with suitable protective clothing and be familiar with the safety measures to be taken to protect themselves and others.
In conclusion, electric vehicle fires present specific challenges that require tailored solutions. Technological advances and firefighter training are helping to improve safety and limit the risks associated with these types of fires.
The latest advances in electric vehicle fire extinguishing and current regulations
The rapid evolution of electric vehicles has created a need to develop specific extinguishing solutions adapted to the particular characteristics of lithium-ion battery fires. Here’s an overview of the latest technological advances and current regulations:
Innovative extinguishing technologies for lithium-ion batteries
- Integrated extinguishing systems: More and more electric vehicles are equipped with integrated extinguishing systems, activated automatically when a fire is detected. These systems often use specific extinguishing agents, such as inert gases or cooling agents, to bring the fire under control quickly.
- New-generation extinguishing agents: Research is focusing on the development of more effective extinguishing agents that are less harmful to the environment. Some agents are able to form a protective barrier around the battery, preventing oxygen from feeding the fire and promoting cooling.
- Robotics and drones: Firefighting robots equipped with thermal imaging cameras and manipulator arms can be used to reach hard-to-reach areas and accurately apply extinguishing agents. Drones can also play an important role in risk assessment and monitoring extinguishing operations.
- Fire extinguishing containers: Containers specially designed for electric vehicles have been developed. Equipped with automatic extinguishing systems, these containers confine the burning vehicle, reducing the risk of propagation.
Lithium ion battery: current and future regulations
Current and future regulations
Fire safety regulations for electric vehicles are evolving rapidly to meet new challenges. Here are a few key points:
- Construction standards: Construction standards for electric vehicles are becoming increasingly stringent in terms of fire safety. Batteries must be installed in secure compartments, and cooling systems must be reliable.
- Firefighter training: Firefighter training is essential to enable them to respond effectively to electric vehicle fires. Training programs must be regularly updated to take account of new technologies and specific risks.
- Charging infrastructures: Regulations concerning charging infrastructures are also evolving. Charging stations must be equipped with safety systems to prevent overloads and short circuits.
- Transport of damaged electric vehicles: Specific regulations govern the transport of damaged electric vehicles, particularly with regard to securing batteries and the choice of transport vehicles.
Challenges and prospects for lithium ion batteries
There are many issues related to fire safety for electric vehicles:
- Harmonizing international standards: Harmonizing international standards is essential to guarantee a uniform level of safety worldwide.
- Costs: New technologies and stricter regulations can lead to higher production costs for electric vehicles.
- Autonomy: Safety measures can have an impact on vehicle autonomy.
The outlook is encouraging, however. Research continues to advance rapidly, and new technologies offer increasingly effective solutions for controlling electric vehicle fires. Ultimately, the aim is to make electric vehicles as safe, if not safer, than internal combustion vehicles.
Lowering the temperature during an electric car fire is crucial for several reasons:
- Limiting thermal runaway: Lithium-ion batteries used in electric vehicles are susceptible to thermal runaway if subjected to excessive heat. Thermal runaway is a chain reaction that can rapidly increase battery temperature, produce flammable gases and intensify fire. Cooling the battery considerably reduces the risk of thermal runaway.
- Reduced production of flammable gases: The intense heat generated by a battery fire can break down electrolytes and produce flammable gases such as hydrogen. Lowering the temperature reduces the production of these gases, and therefore the risk of explosion.
- Easier extinguishing: A cooler fire is easier to extinguish. By reducing the temperature of the battery, we reduce the intensity of the flames and facilitate the action of the extinguishing agents.
- Responder protection: Cooling the battery reduces the risk of splashing molten material and protects firefighters from burns.
Methods used to cool lithium ion batteries in the event of fire include:
Methods used to cool batteries in the event of fire include:
- Immersion in water: This method is often used, but has the disadvantage of provoking violent exothermic reactions on contact with water.
- Use of specific extinguishing agents: Some extinguishing agents are specially designed to cool batteries and form a protective barrier.
- Thermal blankets: These insulate the battery and slow the spread of heat.
- Aerosols: Combining a vehicle fire blanket with gaseous aerosols gives good results.
- Water fog: Increasingly used by firefighters, water fog has proven its effectiveness.
In short, cooling a burning battery is an essential step in controlling the fire and limiting the risk to people and property.
Techniques for extinguishing electric vehicle fires
Electric vehicle fires present specific challenges due to the nature of lithium-ion batteries. Traditional extinguishing methods are not always effective, and can even make the situation worse. Here are some of the techniques used by firefighters:
-
- Water immersion: Although this method may seem intuitive, it is not always recommended, as water can react violently with some lithium-ion batteries, causing an explosion.
- Use of specific extinguishing agents: Some extinguishing agents, such as special dry powders or synthetic foams, are designed to smother flames and cool the battery. These agents are generally more effective than water and less likely to cause violent reactions.
- Prolonged cooling: Once the flames have been brought under control, it is essential to cool the battery for an extended period to prevent any recurrence. This may require the use of large quantities of water or specialized cooling systems.
- Containment: In some cases, firefighters may decide to contain the burning vehicle in a special container filled with water or another extinguishing agent. This method helps to control the fire and limit damage to the environment.
Specific risks associated with electric vehicle fires
- Thermal runaway: As mentioned above, lithium-ion batteries can undergo thermal runaway, a chain reaction that leads to a rapid rise in temperature and the production of flammable gases.
- Fume toxicity: The fumes released by a battery fire may contain toxic substances such as heavy metals and volatile organic compounds.
- Fire duration: Electric vehicle fires can last longer than gasoline vehicle fires, due to the nature of the battery.
- Risks for responders: Firefighters are exposed to specific risks, such as burns, poisoning and explosions.
The challenges of firefighter training
Faced with these challenges, it is essential to train firefighters in intervention techniques specific to electric vehicle fires. This training must cover :
- Recognizing the signs of a battery fire: Firefighters need to be able to quickly identify a burning electric vehicle and assess the risks.
- Suitable extinguishing techniques: They must master the different extinguishing methods and know how to choose the most appropriate technique for the situation.
- Safety measures: Firefighters must be equipped with suitable protective clothing and be familiar with the safety measures to be taken to protect themselves and others.
In conclusion, electric vehicle fires present specific challenges that require tailored solutions. Technological advances and firefighter training are helping to improve safety and limit the risks associated with these types of fires.
The latest advances in electric vehicle fire extinguishing and current regulations
-
The rapid evolution of electric vehicles has created a need to develop specific extinguishing solutions adapted to the particular characteristics of lithium-ion battery fires. Here’s an overview of the latest technological advances and current regulations:
Innovative extinguishing technologies for lithium-ion batteries
- Integrated extinguishing systems: More and more electric vehicles are equipped with integrated extinguishing systems, activated automatically when a fire is detected. These systems often use specific extinguishing agents, such as inert gases or cooling agents, to bring the fire under control quickly.
- New-generation extinguishing agents: Research is focusing on the development of more effective extinguishing agents that are less harmful to the environment. Some agents are able to form a protective barrier around the battery, preventing oxygen from feeding the fire and promoting cooling.
- Robotics and drones: Firefighting robots equipped with thermal imaging cameras and manipulator arms can be used to reach hard-to-reach areas and accurately apply extinguishing agents. Drones can also play an important role in risk assessment and monitoring extinguishing operations.
- Fire extinguishing containers: Containers specially designed for electric vehicles have been developed. Equipped with automatic extinguishing systems, these containers confine the burning vehicle, reducing the risk of propagation.
Lithium ion battery: current and future regulations
Current and future regulations
Fire safety regulations for electric vehicles are evolving rapidly to meet new challenges. Here are a few key points:
- Construction standards: Construction standards for electric vehicles are becoming increasingly stringent in terms of fire safety. Batteries must be installed in secure compartments, and cooling systems must be reliable.
- Firefighter training: Firefighter training is essential to enable them to respond effectively to electric vehicle fires. Training programs must be regularly updated to take account of new technologies and specific risks.
- Charging infrastructures: Regulations concerning charging infrastructures are also evolving. Charging stations must be equipped with safety systems to prevent overloads and short circuits.
- Transport of damaged electric vehicles: Specific regulations govern the transport of damaged electric vehicles, particularly with regard to securing batteries and the choice of transport vehicles.
Challenges and prospects for lithium ion batteries
There are many issues related to fire safety for electric vehicles:
- Harmonizing international standards: Harmonizing international standards is essential to guarantee a uniform level of safety worldwide.
- Costs: New technologies and stricter regulations can lead to higher production costs for electric vehicles.
- Autonomy: Safety measures can have an impact on vehicle autonomy.
The outlook is encouraging, however. Research continues to advance rapidly, and new technologies offer increasingly effective solutions for controlling electric vehicle fires. Ultimately, the aim is to make electric vehicles as safe, if not safer, than internal combustion vehicles.
Lithium ion battery: Specific risks and implications
Thermal runaway and propagation:
Chain reaction: Once a battery cell begins to overheat, it can trigger an exothermic chain reaction, affecting adjacent cells and rapidly raising the overall battery temperature.
Gas production: This reaction produces flammable gases such as hydrogen, considerably increasing the risk of explosion.
Speed of spread: The spread of fire inside the battery can be extremely rapid, making it difficult for the fire department to intervene.
Fume toxicity and health impact:
Harmful substances: The fumes released by the combustion of battery materials and electronic components can contain highly toxic substances, such as heavy metals (lead, cadmium), volatile organic compounds and fine particles.
Health risks: Inhalation of these fumes can cause respiratory tract irritation, heart problems, lung damage and, in the long term, increase the risk of developing certain diseases.
Difficulty of extinction and environmental consequences:
Limited extinguishing methods: Traditional extinguishing methods (water, foam) may be ineffective or even aggravate the situation by causing violent reactions with lithium.
Specific extinguishing agents: The use of specific extinguishing agents is often necessary, but these can have an environmental impact.
Prolonged cooling: Even after the fire is apparently extinguished, the battery may continue to generate heat and present a risk of recurrence.
Impact on infrastructure:
Extensive material damage: An electric vehicle fire can cause considerable damage not only to the vehicle itself, but also to surrounding buildings and infrastructure.
High costs: The costs associated with extinguishing a fire, repairs and economic losses can be very high.
Lithium ion battery: aggravating factors and prevention:
- Battery design: Battery design, the quality of the materials used and the integrated safety systems play a crucial role in fire prevention.
- Operating conditions: Improper use of the battery (overcharging, deep discharge, exposure to extreme temperatures) can increase the risk of an incident.
- Road accidents: violent shocks during an accident can damage the battery and cause a short-circuit.
- Maintenance: Regular and proper battery maintenance is essential to detect any problems before they lead to fire.
To sum up, lithium-ion battery fires present specific and significant risks, both for personal safety and for the environment. It is therefore crucial to develop innovative solutions to prevent these fires and improve response resources in the event of an incident.
French regulations governing electric vehicles and lithium-ion batteries
France, like many other countries, has put in place a regulatory framework to support the development of electric vehicles and ensure a high level of safety. This framework is regularly updated to keep pace with technological advances and new challenges.
General regulations
- Certification: Electric vehicles must comply with strict homologation standards, particularly in terms of safety, performance and pollutant emissions. These standards are defined at European level and transposed into French law.
- Battery safety: lithium-ion batteries used in electric vehicles undergo rigorous testing to guarantee their safety. Manufacturers are required to implement high-performance battery management systems (BMS) to prevent overheating, short-circuits and fires.
- Charging infrastructure: France has set up a plan to develop charging infrastructure for electric vehicles. Charging stations must comply with strict safety standards, particularly in terms of protection against overcurrents and short-circuits.
Specific fire regulations
- Firefighter training: Firefighters are trained in the specific risks associated with electric vehicle fires, and in appropriate response techniques.
- Transporting damaged vehicles: Specific regulations govern the transport of damaged electric vehicles, particularly with regard to securing batteries.
- Building construction and renovation: Building construction and renovation standards are increasingly taking into account the installation of electric vehicle charging stations, with specific fire safety requirements.
Lithium ion battery: aggravating factors and prevention:
-
- Battery design: Battery design, the quality of the materials used and the integrated safety systems play a crucial role in fire prevention.
- Operating conditions: Improper use of the battery (overcharging, deep discharge, exposure to extreme temperatures) can increase the risk of an incident.
- Road accidents: violent shocks during an accident can damage the battery and cause a short-circuit.
- Maintenance: Regular and proper battery maintenance is essential to detect any problems before they lead to fire.
To sum up, lithium-ion battery fires present specific and significant risks, both for personal safety and for the environment. It is therefore crucial to develop innovative solutions to prevent these fires and improve response resources in the event of an incident.
French regulations governing electric vehicles and lithium-ion batteries
France, like many other countries, has put in place a regulatory framework to support the development of electric vehicles and ensure a high level of safety. This framework is regularly updated to keep pace with technological advances and new challenges.
General regulations
- Certification: Electric vehicles must comply with strict homologation standards, particularly in terms of safety, performance and pollutant emissions. These standards are defined at European level and transposed into French law.
- Battery safety: lithium-ion batteries used in electric vehicles undergo rigorous testing to guarantee their safety. Manufacturers are required to implement high-performance battery management systems (BMS) to prevent overheating, short-circuits and fires.
- Charging infrastructure: France has set up a plan to develop charging infrastructure for electric vehicles. Charging stations must comply with strict safety standards, particularly in terms of protection against overcurrents and short-circuits.
Specific fire regulations
- Firefighter training: Firefighters are trained in the specific risks associated with electric vehicle fires, and in appropriate response techniques.
- Transporting damaged vehicles: Specific regulations govern the transport of damaged electric vehicles, particularly with regard to securing batteries.
- Building construction and renovation: Building construction and renovation standards are increasingly taking into account the installation of electric vehicle charging stations, with specific fire safety requirements.
Lithium ion battery: Challenges and prospects
Challenges and prospects
Current regulations in France aim to reconcile the development of electric vehicles with the safety of people and property. However, a number of challenges remain:
- Harmonizing international standards: Harmonizing international standards is essential to guarantee a uniform level of safety worldwide.
- Rapidly evolving technologies: Regulations need to be regularly updated to keep pace with rapidly evolving battery and electric vehicle technologies.
- Costs: New regulations may lead to higher production costs for electric vehicles and charging infrastructure.
For more precise and up-to-date information, I recommend the following websites:
- Ministry of Ecological Transition: This site will give you an overview of public policies on electric vehicles.
- Avere-France: This association brings together professionals in the electric vehicle sector, offering a wealth of information on regulations and the latest developments.
- Inéris: The Institut national de l’environnement industriel et des risques (Ineris) is a public industrial and commercial establishment under the supervision of the Ministry of the Environment.
Penalties for non-compliance with regulations governing electric vehicles and lithium-ion batteries in France can vary according to the nature of the offence and the entity involved (manufacturer, distributor, installer, etc.).
However, here are a few examples of potential sanctions:
- Administrative fines: Companies and individuals may be subject to administrative fines for non-compliance with applicable standards. The amount of these fines can be significant, and varies according to the seriousness of the infraction.
- Suspension or withdrawal of approval: Manufacturers and installers may have their approval or license withdrawn if their products or installations do not comply with safety standards.
- Compliance under penalty payment: In the event of non-compliance, the competent authorities can impose compliance under penalty payment, i.e. a daily financial penalty for as long as the situation remains unresolved.
- Criminal prosecution: In the most serious cases, notably those involving the endangerment of others, criminal proceedings may be instituted. Penalties can range from fines to imprisonment.
- Civil liability: In the event of an accident or damage caused by an electric vehicle or a non-compliant battery, the party responsible may be required to compensate the victims.
As regulations are constantly evolving, it’s important to keep abreast of the latest provisions, and to consult a specialist legal advisor if in doubt.
Examples of situations that may result in sanctions:
- Marketing an unlicensed electric vehicle
- Installation of a substandard charging station
- Failure to observe safety rules when transporting batteries
- Failure to meet consumer information obligations
It is essential to remember that failure to comply with regulations can have serious consequences, both financially and legally.
Electric vehicle fires, particularly those involving lithium-ion batteries, present specific extinguishing challenges. The extinguishing agents used for these types of fires must be adapted to their particular characteristics.
Differences between extinguishing agents used for electric vehicles and other types of fire :
Differences between extinguishing agents used for electric vehicles and other types of fire :
- Nature of the fire: Electric vehicle fires are often more difficult to extinguish, and can re-ignite quickly due to the chemical nature of lithium-ion batteries. They require extinguishing agents capable of rapidly cooling the battery and creating a barrier preventing oxygen from fuelling combustion.
- Specific risks: Lithium-ion batteries can undergo thermal runaway, which can lead to explosion. Extinguishing agents must therefore be capable of containing this exothermic reaction. What’s more, the fumes given off by these fires are often toxic, imposing additional safety requirements on responders.
- Specific extinguishing agents:
- Water-based agents: Water, commonly used for Class A fires (solids), can be ineffective or even dangerous for lithium-ion battery fires, as it can cause violent reactions with lithium.
- Dry powders: Dry powders are often used for Class B (flammable liquids) and C (electrical equipment) fires. However, they may not be sufficient to completely control a lithium-ion battery fire, and may leave corrosive residues.
- Specific extinguishing agents: Specific extinguishing agents have been developed for lithium-ion battery fires. They are generally based on chemicals capable of rapidly cooling the battery and creating a protective barrier.
- Inert gases: Inert gases such as argon, nitrogen and potassium nitrate can be used to smother fire by depriving combustion of oxygen.
Why special extinguishing agents?
- Rapid cooling: Specific extinguishing agents are designed to cool the battery rapidly, limiting heat propagation and chain reaction.
- Creating a barrier: They form a protective barrier around the battery, preventing oxygen from fuelling combustion and limiting the risk of explosion.
- Inhibition of chemical reactions: Some extinguishing agents are able to inhibit the chemical reactions at the origin of the fire, helping to extinguish it for longer.
In conclusion, fires involving electric vehicles require specific extinguishing agents to ensure a safe and effective response. It is therefore essential to train fire-fighters in the use of these products, and to have the appropriate equipment on site.
Why special extinguishing agents?
Why special extinguishing agents?
- Rapid cooling: Specific extinguishing agents are designed to cool the battery rapidly, limiting heat propagation and chain reaction.
- Creating a barrier: They form a protective barrier around the battery, preventing oxygen from fuelling combustion and limiting the risk of explosion.
- Inhibition of chemical reactions: Some extinguishing agents are able to inhibit the chemical reactions at the origin of the fire, helping to extinguish it for longer.
In conclusion, fires involving electric vehicles require specific extinguishing agents to ensure a safe and effective response. It is therefore essential to train fire-fighters in the use of these products, and to have the appropriate equipment on site.
You’re still here? It’s a pleasure. Continue reading by discovering our article “Vlitex vs Fire isolator fire blanket comparison”.
