Study on the actual situation of lithium ion battery heated to 250 degrees Celsius under thermal imaging

Lithium-ion batteries are almost everywhere in life, and electronic products such as mobile phones, tablets, cameras, and notebook computers need to be powered by lithium-ion batteries. However, lithium batteries sometimes cause overheating or explosion due to some unexpected conditions. Today, as battery capacity is growing, user security issues are particularly interesting.

Recently, researchers at the University of London used 3D thermal imaging technology to track the heating process of lithium-ion batteries.

We saw that the lithium battery in the video was heated to 250 degrees Celsius (482 degrees Fahrenheit) and the volume expanded rapidly until it exploded. The researchers called this process "thermal runaway."

The results show that the internal structure of the lithium battery does not change before the "thermal runaway", but at the moment of the explosion, the copper material inside the battery melts to raise the temperature to 1000 degrees Celsius, and the generated heat spreads from the inside to cause "thermal runaway." "Lithium batteries are usually installed inside the device and connected to other electronic components. "Thermal runaway" not only causes the battery core to collapse, but also increases the risk of internal short circuits and damage to nearby objects.

Researchers say the significance of this test is to provide valuable experience for their research on lithium-ion battery degradation and hope to help in the future safety design of batteries.

In fact, as long as the user standardizes the use of the device in hand, the occurrence of overheating of the battery component is rare. After all, the battery is heated to 250 degrees Celsius for no reason, and most people will not risk doing it.

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