{"id":3001,"date":"2026-09-10T13:28:02","date_gmt":"2026-09-10T11:28:02","guid":{"rendered":"https:\/\/ap-citydesign.com\/lithium-fire-safety-why-conventional-extinguishing-agents-fail\/"},"modified":"2026-09-11T16:11:58","modified_gmt":"2026-09-11T14:11:58","slug":"lithium-fire-safety-why-conventional-extinguishing-agents-fail","status":"publish","type":"post","link":"https:\/\/ap-citydesign.com\/en\/lithium-fire-safety-why-conventional-extinguishing-agents-fail\/","title":{"rendered":"Lithium fire safety: why conventional extinguishing agents fail"},"content":{"rendered":"

Lithium-ion batteries sit in electric cars, e-bikes, forklifts, power stations and stationary storage. The technology is everyday kit. A fire from these cells still does not behave like a classic vehicle or warehouse fire: it can spread from cell to cell, release toxic gases and flare up again after it looks extinguished. <\/p>\n

Anyone responsible for a fleet, logistics or a workshop does not need a marketing promise. They need a clear picture: what happens inside the battery? What can staff do \u2014 and what should they not do? And what role does a fire blanket play until the fire service takes over?<\/p>\n<\/div>

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What happens in the cell: thermal runaway<\/h2><\/span>
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Specialist bodies use thermal runaway for a self-reinforcing, heat-generating reaction inside the cell. Typical triggers are mechanical damage, overcharging, an internal short circuit or heat from outside. <\/p>\n

Two points set the course apart from a wood or fuel fire:<\/p>\n

First, the reaction can continue from cell to cell (propagation). A local defect becomes a surface event across the pack. <\/p>\n

Second, some cathode materials break down at high temperature and release heat and oxygen. The reaction therefore carries part of its own oxidiser. That is what people mean when they say the fire cannot simply be smothered. <\/p>\n

Temperatures inside the cell can rise well above 1,000 \u00b0C. Outside you often see alternating light-grey and deep-black smoke, hissing venting and sometimes jet flames. In enclosed rooms the escaping electrolyte vapours can also form an explosive atmosphere.<\/p>\n<\/div>

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Why the works extinguisher often is not enough<\/h2><\/span>
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The misunderstanding usually starts with the word \u201cextinguish\u201d. For the fire service, water is the agent of choice: it cools and, if enough of it reaches the inside of the pack, can break the chain reaction. Fire-service guidance and DGUV say so explicitly. Foam on stored goods is viewed more critically: the reaction continues under the foam blanket and you lose sight of the load. <\/p>\n

On site you lack exactly what the fire service brings: large volumes of water, branch pipes, a thermal camera, respiratory protection. A handheld extinguisher cools the casing at best for a moment. Powder and CO\u2082 suppress external flames but do not reliably stop the process in the cell. That is why the German Social Accident Insurance treats staff attempts to fight lithium-ion battery fires as critical: priority is evacuate, warn, call the fire service \u2014 not a heroic attack with the 6 kg unit. <\/p>\n

Add the reignition risk. Damaged packs can run away again hours or days later. After the event the vehicle or device remains a job for specialists, not \u201cblanket off, back to work\u201d.<\/p>\n<\/div>