Why Lithium-Ion Batteries Explode?

Battery problems on brand-name phones are relatively rare and are more common in refurbished or second-hand phones. 2. To save costs, mobile phones or refurbished machines often choose batteries with lower-cost performance in mobile phone equipment. These batteries are low cost, have too many impurities, have a poor planning process, and risk self-destruction.

Long-term overcharge of the battery: If the battery is in an overcharged state for a long time, overcharge and overcurrent will also lead to high temperature and high pressure, causing hidden dangers. Lithium-ion batteries can be instantaneously discharged and a large amount of current spontaneously ignited or exploded under special temperatures, humidity, and poor contact conditions.

Battery short circuit: When the mobile phone is in a high-temperature state or subjected to shock, mental conflict, and other conditions, it may cause a battery short circuit and burst.

Low-temperature lithium iron phosphate battery 3.2V 20A
Low-temperature lithium iron phosphate battery 3.2V 20A
-20℃ charge, -40℃ 3C discharge capacity≥70%
Charging temperature: -20~45℃
-Discharge temperature: -40~+55℃
-40℃ support maximum discharge rate: 3C
-40℃ 3C discharge capacity retention rate≥70%

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Charging will cause the battery to explode: Playing with the phone while charging will cause the charging time to become longer, and long-term charging will cause the phone to heat up and explode more easily.

Charger and battery do not match: Generally, mobile phones have original chargers. The wrong charger will only lead to battery accidents. The iPhone is only charged with the original charger, which greatly reduces the possibility of the battery self-destructing.

High temperature: High temperature means that the internal heat of the battery reaches the limit, long-term charging, high-temperature irradiation, and baking are all simply caused by the excessive temperature of the battery. In southern my country, ordinary families use electric furnaces in winter. Many people like to play with their phones while heating up on an electric stove, which can also be dangerous.

Thermal runaway: Lithium-ion batteries are at risk of explosion due to a reaction that occurs inside the battery called thermal runaway. Thermal runaway is a process of positive energy feedback: an increase in temperature causes the system to heat up, which in turn heats the system. The above reasons, such as battery short circuit, high ambient temperature, frequent overcharging, unauthorized modification of the casing, etc., can lead to thermal runaway of lithium-ion batteries, which can eventually lead to fire or explosion.

But don't worry too much, your device is not a time bomb. As long as it is used reasonably in peacetime, lithium-ion batteries will operate safely and reliably. You should charge it when it drops to 50%. Lithium ions have no memory effect, but voltages that are too low can seriously damage them.