Lithium-Ion Battery Fire Safety for Collision Shops
Lithium-ion battery fire safety has become a real concern for any collision shop that takes in electric and hybrid vehicles, because the battery pack in an EV behaves nothing like a gas tank when things go wrong. These fires happen less often than gasoline fires, but when they start they burn far hotter, spread faster, and resist being put out. The single most dangerous feature is thermal runaway, where one failing cell ignites the cells next to it and sets off a chain reaction that can swallow the whole pack in seconds.
What makes thermal runaway a different animal than anything we grew up fighting is the reignition. A pack you believe is dead cold can flare back up anywhere from a few minutes to several days later. That one fact should reshape how a shop stores these vehicles, trains its people, and stocks its fire equipment. After decades around booths and frame racks, I can tell you the old habits that worked on an engine fire will get somebody hurt here.
Train Every Person in the Shop, Not Just the EV Techs
Prevention is the whole ballgame, and prevention starts with people. Technicians who are certified to work high-voltage systems already respect the risk, but a fire does not check certifications before it spreads. Everyone on the floor, from the detailer to the front counter, needs to know the warning signs and the emergency plan.
Lithium batteries typically go bad through swelling, cracking, or overcharging. Train your crew to ask customers about their charging habits, and let the owner know that habitually overcharging degrades the pack and raises the fire risk. That conversation does two things: it flags a possible hazard before the car ever gets on a lift, and it puts the customer on notice.
Even with a certified tech, watch how these vehicles get handled. A puncture, a crack, or a simple drop can trigger a fire, so battery components get treated gently, every time. The warning signs to drill into everyone are bulging, cracks, and a sharp acrid or metallic smell. Any of those means the pack is a hazard. The tech should pull it from the vehicle and move it to a proper storage container away from the building, following the protocol your local fire prevention office lays out, since those requirements change from place to place.
Even if you think the fire is out, call the fire department anyway. The battery can reignite minutes or days later.
One rule gets no exceptions: never fight one of these fires with water. In a shop you never know what oil or grease the flames have reached, and water is not your friend around a lithium pack. If a fire does start, use the proper equipment to contain it, call the fire department immediately, and do not try to be the hero.
Stock the Right Fire Equipment Before You Need It
A standard ABC extinguisher will not handle a lithium fire. You need extinguishers built specifically for lithium-ion and thermal runaway, and they have to be positioned within 30 feet of any vehicle that could catch. How many you need depends on the size of your shop and how many EVs you move through it.
Lithium-ion fire blankets are the other essential, but go in understanding what a blanket does and does not do. It will not put the fire out. It buys time by containing the blaze until the fire department arrives, and time is tight. A pack can erupt into intense flames in roughly 10 seconds and turn into a room-wide fire within minutes. Keep the blanket close to where you work on these cars.
Then actually train on the gear. Hands-on fire safety courses are easy to find, and some instructors will run group sessions for several shops at once to keep the cost down. Equipment nobody has practiced with is just decoration.
Keep EVs in a Separate, Dedicated Area
Any vehicle with a lithium battery, especially one where the pack is exposed, belongs in its own area. A punctured or cracked battery vents flammable vapors, so it has to stay away from heat sources and sparks. A dedicated bay for electric and hybrid work is not overkill, it is basic hazard control.
Stay ahead of it. By the time you see flames, the situation has already gotten away from you. For an AW Collision customer, that discipline is exactly why OEM-certified shops invest in training and the right equipment before an EV ever rolls in, and it is worth asking any shop how they handle high-voltage work before you schedule your repair. A little preparation now costs a lot less than a fire later.
Read the original story.