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Why smartphone batteries sometimes explode?
Scientists have been able to track the entire process of what happens inside lithium-ion batteries that leads to their overheating and exploding. \"Understanding how Li-ion batteries fail and potentially cause a dangerous chain reaction of events is important for improving their design to making them safer to use and transport,\" said the scientists.
London: Scientists have been able to track the entire process of what happens inside lithium-ion batteries that leads to their overheating and exploding. "Understanding how Li-ion batteries fail and potentially cause a dangerous chain reaction of events is important for improving their design to making them safer to use and transport," said the scientists.
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"We combined high energy synchrotron X-rays and thermal imaging to map changes to the internal structure and external temperature of two types of Li-ion batteries as we exposed them to extreme levels of heat," said first author Donal Finegan from University College London (UCL).
The battery with an internal support remained largely intact up until the initiation of thermal runaway, at which point the copper material inside the cell melted indicating temperatures up to 1,000 degrees Celsius. This heat spread from the inside to the outside of the battery causing thermal runaway.
