The Samsung Note7 battery explosion incident caused a great deal of controversy. So why do mobile phone lithium batteries explode? What exactly causes lithium batteries to catch fire? Here's an explanation.
Why do mobile phone lithium batteries explode?
Charging too fast
A lithium-ion battery is mainly composed of lithium alloy metal oxide as the positive electrode material, graphite as the negative electrode material, and a non-aqueous electrolyte solution to realize the chemical reaction and provide electricity. During charging, lithium ions are located at the positive electrode, and during discharging, they move to the negative electrode; the principle is very simple.
The problem is that lithium ions have a limited mobility; once this is exceeded, they become unstable, leading to things like short circuits. While companies like Qualcomm are actively promoting fast charging technology, the charging speed needs to meet the limits of lithium ions and a stable environment needs to be created through certain technologies to prevent short circuits.
If this step is not handled properly, a short circuit will heat the electrolyte solution, and the battery will catch fire.
This concludes my explanation of why mobile phone lithium batteries can explode. I hope this information is helpful.
