Lithium-ion Battery Fire Risks | CheckFire
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Lithium-ion batteries are part of everyday life

In a world that’s always on the go, lithium-ion batteries are the silent energy source keeping our devices and lives running smoothly. But despite their widespread use, there are still dangerous fires risks associated with lithium-ion batteries.

Here, we discuss the risks associated with lithium-ion batteries and their potential to cause a lithium-ion battery fire.

What causes battery damage?

Damaged lithium-ion batteries can become unstable, posing a potential fire risk where compromised battery cells overheat and cause a state known as thermal runaway. There are numerous ways in which lithium-ion batteries can become damaged:

OVERCHARGING

OVERHEATING

CRUSHING

PENETRATION

SHORT CIRCUIT

DAMAGED DEVICES
& MALFUNCTION

What is thermal runaway?

Put simply, thermal runaway is an uncontrollable, self-heating state only stoppable through the removal of chemicals or heat. This process is triggered as a result of damage caused to lithium-ion batteries.

RISING TEMPERATURE

Thermal runaway occurs when the battery temperature reaches 60°C or more, at which point large amounts of toxic and flammable gases are released and a sharp rise in temperature occurs.

01

DOMINO EFFECT

Very soon after, the gases burst the battery and almost always ignite. This fire then rapidly propagates across all the cells in the battery, causing thermal runaway in otherwise undamaged cells.

02

EXPLOSION

The explosive nature of the molten metal and the degree of collateral fires it causes is huge, causing peripheral fires to spread to surrounding areas.

03

KNOWING THE FACTS

There has been a huge surge in Lithium-ion battery fires, where they have quadrupled in number since 2020.

150%

increase in fires by exploding batteries in e-scooters and e-bikes in 2021

48%

of all waste fires occurring in the UK each year

158M

cost to the UK economy annually with the occurrence of waste fires

190

people injured by e-bike and e-scooter fires

24

fires each week are started by chargers, batteries and cables

239

fires recorded in the UK were linked to electric vehicles

Advice

A. Put simply, thermal runaway is an uncontrollable, self-heating state that is only stoppable through the removal of chemicals or heat. Thermal runaway occurs when the battery temperature reaches 60°C or more, at which point large amounts of toxic and flammable gases are released and a sharp rise in temperature occurs. Very soon after, the gases burst the battery and almost always ignite. This fire then rapidly propagates across all the cells in the battery, causing thermal runaway in otherwise undamaged cells. The explosive nature of the molten metal and the degree of collateral fires it causes is huge, causing peripheral fires to spread to surrounding areas.
A. Mobile phones, smart watches, cordless vacuum cleaners, e-bikes and e-scooters, handheld tools, laptops and tablets, wireless speakers.
A. Overcharging devices. Exposing devices to high temperatures (e.g. in the sun), accidental dropping and spillages, using an incorrect charger.

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