Reasons for lithium battery fire and explosion. 1 article amazing makes it clear!

Reasons for lithium battery fire and explosion

Reasons for lithium battery fire: Lithium batteries are both combustible and ignition sources. Once collision, extrusion, overcharging, and short circuit occur, they may cause safety accidents such as lithium battery fire and explosion, causing casualties.

With the rapid development of science and technology, the lithium battery industry has been widely used in our daily lives, from mobile phones, and laptops to electric vehicles. However, this battery, which is known as the “energy of the 21st century”, also brings a hidden worry.

Reasons for lithium battery fire and explosion

The working principle of lithium batteries is to rely on the movement of lithium ions between the positive and negative electrodes to realize the charging and discharging process. In this process, the battery will accumulate a lot of heat. If the heat cannot be dissipated in time, it may cause a thermal runaway of the battery, which will cause fire or explosion. Specifically, the main factors causing lithium battery explosions are overcharging and short circuits.


Overcharge mainly occurs during the charging process of lithium batteries. Due to the internal resistance of the battery, a large amount of heat will be accumulated in the battery during charging. To protect the battery, a protection device is usually installed in the lithium battery to provide a certain degree of protection against overcharging by detecting the voltage.

However, when the overcharging time is too long and the voltage is too high, the lithium-ion battery is prone to a dendrite short circuit inside, causing the temperature and pressure of the lithium battery to continue to rise, thereby creating the risk of lithium battery fire.

Short circuit

Short circuit mainly occurs during the use of lithium batteries. When the lithium battery is in use, its temperature will continue to rise, and the battery also maintains normal heat dissipation.

If the battery temperature is too high due to external factors, such as long-term exposure to a high-temperature environment or using a charger that does not meet the specifications, it is easy to cause damage to the battery diaphragm and cause a short circuit. A short circuit will cause excessive internal heat accumulation, triggering a chain chemical reaction, and eventually causing the lithium battery to catch fire, explode and burn.

The lithium battery fire was initiated due to thermal runaway
The lithium battery fire was initiated due to thermal runaway

Characteristics of lithium battery fire

Lithium battery fire has several significant characteristics: fast ignition speed, long duration, high burning temperature, and difficulty in extinguishing. Once a lithium battery catches fire, the fire tends to spread rapidly and burn for a long time, which makes it extremely difficult to extinguish the fire.

In addition, the temperature generated by lithium battery fire is extremely high, which can reach more than 600℃, which makes conventional fire extinguishing methods often difficult to work. Worse, even if the flame is extinguished, the short-circuit reaction inside the battery may continue, and there is a risk of long-term spontaneous combustion or even explosion.

How to deal with the risk of lithium battery fire and explosion

Faced with the risk of lithium battery fire and explosion, we should take a series of measures to reduce this risk:

Use regular-brand lithium batteries and chargers: Purchasing and using regular-brand lithium batteries and chargers can reduce safety risks caused by product quality problems.

Avoid overcharging: Reasonably control the charging time and avoid long-term overcharging to reduce the risk of dendrite short circuits.

Control battery temperature: Avoid exposing lithium batteries to high-temperature environments and ensure that the battery operates within the normal operating temperature range.

Prevent physical damage: Avoid physical damage to the battery such as collision and extrusion to prevent internal short circuits.

Understand safety knowledge: Learn and understand the knowledge about the safe use of lithium batteries to improve self-protection awareness.

Although the advantages of lithium batteries are very obvious and bring many conveniences to people, we also need to pay attention to their safety risks. By understanding the causes and characteristics of lithium battery fires and explosions and taking corresponding preventive measures, we can better ensure the safety of ourselves and others.

The risk of a lithium battery fire increases with overcharging
The risk of a lithium battery fire increases with overcharging

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