As electric vehicles (EVs) like Tesla continue to grow in popularity, safety questions about lithium battery fires are becoming more common.
While these incidents are extremely rare, understanding how to put out a lithium battery fire — especially in high-energy EVs — is vital for both public safety and professional response teams.
At Jiangmen Hongli Energy Co., Ltd., a specialist in 3V primary lithium batteries, we deeply understand the chemistry behind lithium power and the safety standards required to prevent combustion. In this article, we’ll explain why EV battery fires happen, how professionals respond, and how Hongli’s design principles ensure maximum safety.
1. Why Lithium Battery Fires Occur
Lithium batteries, including those in Tesla vehicles, store a massive amount of energy in compact cells. When this energy is released uncontrollably — a process called thermal runaway — the battery may overheat, ignite, or even explode.
Common causes of thermal runaway:
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Physical damage: from crashes or punctures
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Manufacturing defects: internal short circuits or impurities
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Overheating: caused by rapid charging or poor cooling
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Electrical abuse: overcharge, deep discharge, or current surge
Once a lithium cell reaches about 150–200°C, internal components begin to break down, releasing flammable gases such as ethylene, methane, and hydrogen — which can self-ignite.
2. Why Lithium Battery Fires Are Different from Normal Fires
Lithium battery fires are chemical fires, not fuel fires. Unlike gasoline or wood, these reactions create their own oxygen, which means they can reignite even after flames are suppressed.
That’s why traditional methods — such as water or foam extinguishers — are often ineffective and can even worsen the fire if applied incorrectly.
3. Can You Use Water on a Tesla Lithium Battery Fire?
Yes, but only in a controlled, professional way.
While metallic lithium reacts dangerously with water, Tesla EV batteries use lithium-ion chemistry, which does not contain pure lithium metal.
Therefore:
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Small EV battery fires: Water can be used for cooling and containment, but not to smother the flames.
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Large or uncontrolled fires: Continuous flooding with large amounts of water (up to 10,000 liters) is often required to reduce temperature and stop re-ignition.
In these cases, fire departments use directed water streams to cool battery packs and surrounding structures while preventing further spread.
⚠️ Important: Never attempt to extinguish a large EV battery fire yourself. These situations require trained emergency personnel and protective gear.
4. Recommended Steps to Handle a Tesla Battery Fire
When a lithium battery fire occurs — whether in an electric vehicle or storage facility — time, distance, and cooling are key.
Step 1: Call Emergency Services Immediately
Report it as a “lithium battery fire” so first responders can prepare the correct equipment.
Step 2: Keep a Safe Distance
Lithium battery fires release toxic gases (hydrogen fluoride, carbon monoxide).
Stay at least 15–20 meters away and avoid inhaling smoke.
Step 3: Do Not Use Small Fire Extinguishers
Portable CO₂ or foam extinguishers cannot stop thermal runaway once it begins. They may suppress surface flames but not internal heat.
Step 4: Professional Response
Firefighters use:
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Large water streams for sustained cooling (to prevent re-ignition)
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Thermal imaging cameras to detect remaining hot cells
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Immersion tanks for isolating damaged battery packs underwater (for days if needed)
Tesla provides detailed emergency guidelines to local fire departments on how to safely manage their battery systems.
5. Why Flooding Works for EV Batteries
In the case of EV batteries, water acts primarily as a coolant, not as a chemical suppressant.
It helps dissipate the enormous heat stored in thousands of interconnected lithium-ion cells.
For instance:
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A typical Tesla battery pack contains up to 7,000 cells.
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Even if a few cells ignite, neighboring ones can reach ignition temperature.
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Continuous cooling prevents this chain reaction from spreading.
This is why professional responders often submerge burning or damaged battery packs in water containers for several hours or days.
6. Alternatives to Water: Class D and Dry Agents
When dealing with metallic lithium (as in some industrial or primary lithium batteries), water must be avoided. Instead, use:
| Fire Type | Recommended Extinguisher | Description |
|---|---|---|
| EV Lithium-ion Fire (Tesla) | Water (controlled flooding) | For cooling and preventing re-ignition |
| Metallic Lithium Fire (Primary batteries) | Class D (dry powder) | Uses graphite, sodium carbonate, or copper powder |
| Mixed or external material fires | Foam or dry chemical | To contain surrounding materials, not battery core |
Hongli Energy’s 3V lithium primary batteries belong to the latter category — using lithium metal — and thus follow Class D safety standards, never extinguished with water.
7. How Hongli Energy Prevents Lithium Battery Fire Risks
At Hongli Energy, we incorporate advanced materials and safety systems that make our lithium batteries exceptionally stable and resistant to thermal events.
7.1 Advanced Cell Design
Our CR series batteries (CR123A, CR14505, CR17450, etc.) use lithium-manganese dioxide (Li/MnO₂) chemistry, which is thermally stable and non-reactive under normal operation.
7.2 Precision Manufacturing
All batteries are produced in clean, humidity-controlled workshops with laser-welded stainless-steel casings — preventing contamination and gas leakage.
7.3 Built-In Safety Features
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PTC (Positive Temperature Coefficient) device to limit current
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Pressure relief vent to release gas safely if pressure builds
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Multi-layer seals to eliminate electrolyte leakage
7.4 Rigorous Testing
Each batch passes:
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Overcharge and short-circuit tests
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High-temperature exposure (70°C)
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Drop, vibration, and impact testing
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UN38.3 certification for international transport
These measures ensure fire-free operation and long-term reliability in industrial and consumer applications.
8. Safety Tips for EV and Battery Users
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Avoid physical damage — Never puncture or crush a lithium battery.
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Use proper chargers — Always use manufacturer-approved equipment.
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Keep batteries cool and ventilated — Avoid direct sunlight or enclosed heat.
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Dispose safely — Recycle through certified collection centers.
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Do not use damaged batteries — Replace immediately if bulging, leaking, or hot.
9. Hongli Energy’s Commitment to Safe Power
As a National High-Tech Enterprise founded in 2015, Jiangmen Hongli Energy Co., Ltd. focuses on delivering safe, stable, and high-performance 3V primary lithium batteries for global partners.
With an annual capacity exceeding 40 million cells, certified by CE, RoHS, and UN38.3, we guarantee superior quality, OEM/ODM flexibility, and long-term stability across every production line.
Conclusion
So, how do you put out a lithium battery fire in a Tesla or electric vehicle?
The correct approach is controlled cooling using large volumes of water, handled by professionals — never small extinguishers or foam.
For metallic lithium-based batteries, like those manufactured by Hongli Energy, the proper solution is dry powder (Class D) extinguishing agents and strict prevention through quality engineering.
At Hongli Energy, safety begins with design.
Our advanced materials, precise sealing, and rigorous testing ensure our batteries deliver power without risk — trusted by industries worldwide.
Visit www.honglienergy.com to learn more about our high-safety lithium batteries or inquire about OEM/ODM partnerships.