How to Extinguish Lithium Battery Fires in Winter: Key Insights and Effective Measures

In today's era of rapid technological advancement, lithium batteries have become a widely used and efficient energy storage solution, powering devices from smartphones and laptops to electric vehicles. However, despite the continuous improvement in lithium battery technology, the potential safety risk of self-ignition remains a concern, especially during winter, a season that may seem low-risk but harbors hidden dangers. So, how should we effectively extinguish lithium battery fires in winter?

I. Understanding Lithium Battery Self-Ignition and Winter-Specific Risks  

Lithium batteries are primarily composed of components such as cathodes, anodes, electrolytes, and separators. Under normal conditions, they operate stably during charge and discharge cycles. However, issues like internal short circuits or overheating can trigger intense chemical reactions, rapidly raising the battery's temperature and potentially causing self-ignition.  

In winter, although ambient temperatures are lower, lithium batteries perform less efficiently in cold conditions. Internal resistance increases, making heat generation more likely during charge and discharge cycles. Additionally, improper measures such as using low-quality thermal insulation covers to keep batteries warm can hinder heat dissipation, increasing the risk of fire.  

1. Precautions Before Extinguishing a Fire  
2. Ensure Personal Safety:  

   Upon discovering a lithium battery fire, prioritize the safety of yourself and those around you. Quickly evacuate the area to avoid harm from flames and toxic fumes. Do not attempt to handle the fire unless you have professional knowledge and equipment.  

2. Call Emergency Services:  

   Dial the local fire emergency number and provide accurate information about the fire's location and intensity. This ensures a rapid response from firefighters equipped with suitable tools for extinguishing the blaze.  

1. Common Firefighting Methods  
2. Dry Powder Extinguishers:  

   Dry powder extinguishers are highly effective for lithium battery fires. They work by spraying a powder to cover the burning surface and cut off oxygen, thereby extinguishing the fire. To use, stand upwind at a distance of 3–5 meters, shake the extinguisher, pull out the safety pin, aim the nozzle at the fire's base, and press the handle to discharge the powder.  

4. Carbon Dioxide Extinguishers:  

   Carbon dioxide extinguishers can also be used. They suppress fires by suffocating the flames and cooling the area. Stand upwind to avoid exposure to leaked CO₂. Position the extinguisher near the fire, release the safety pin, hold the nozzle, and direct the spray at the fire's base.  

5. Large Amounts of Water:  

   In some situations, copious amounts of water can extinguish lithium battery fires. Continuous application of water helps lower the battery's temperature, preventing re-ignition. However, small amounts of water may evaporate instantly due to the high heat, proving ineffective and potentially exacerbating the fire. Avoid directing water streams directly at the battery to prevent rupturing it and causing electrolyte leakage.  

1. Ineffective Methods and Their Risks  
2. Foam Extinguishers:  

   Foam extinguishers are unsuitable for lithium battery fires. The water and chemicals in the foam may react with the battery's electrolyte, worsening the fire and potentially causing explosions.  

7. Sand Covering:  

   While sand can block oxygen, it does not effectively dissipate heat. The ongoing chemical reactions inside the battery may cause the fire to reignite, making sand an unreliable solution.  

1. Post-Fire Handling  
2. Avoid Touching Burnt Batteries:  

   Even after extinguishing the flames, burnt lithium batteries may remain hazardous due to residual heat or leaked electrolytes. Wait for professionals to handle and dispose of the debris safely.  

9. Clean Up the Site:  

   After ensuring safety, clean the affected area. If electrolyte leakage has occurred, follow environmental protection regulations to properly dispose of the waste and prevent pollution.  

Conclusion  

Understanding how to extinguish lithium battery fires in winter is crucial. Proper use and maintenance of lithium battery devices, including routine inspections, can help prevent accidents. By keeping these measures in mind, you can respond calmly to such emergencies, safeguarding lives and property.