The batteries in various devices can store power, after which the internal chemicals release the power in any way possible. But there are also problems, such as a sudden fire. So how is this fire phenomenon caused?
According to American experts, if the battery is over-discharged, the internal chemicals will decompose, generating excessive amounts of lithium oxide, burning it, and generating more lithium oxide. The chemists call it "thermal runaway," and the average person sees the fire, which is why the Boeing 787 is banned by the US Airways Administration (FAA). The same happens when the battery is punctured, so the US Transportation Security Administration (TSA) recommends that passengers carefully place the battery in their carry-on baggage instead of consignment.
At the same time, due to the possibility of fire, the lithium battery must be tightly controlled. Battery manufacturers use a charge controller to manage the current to achieve this. In fact, each battery has a built-in small computer to prevent it from over-discharging. This component also controls the current that enters the battery during charging, slowing down the current when it is almost full, and avoids overcharging.
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