What is the reason for the frequent explosion of lithium batteries?

There are few problems with the battery itself of the brand phone, and problems with the battery itself appear in the converter or second phone. In order to save costs, mobile phones or refurbishers tend to choose lower-cost low-quality batteries in mobile phone configurations. These batteries have low cost, excessive impurities, poor design processes, and high risk of self-explosion.

The electric core is overcharged for a long time: under the long-term charging state, overcharging and overcurrent will also lead to high temperature and high pressure, causing hidden dangers. Lithium batteries may be discharged instantaneously at special temperatures, humidity, and poor contact conditions, resulting in a large amount of current, spontaneous combustion or explosion.

Battery short circuit: When the mobile phone is in a high temperature, or when it is hit, metal friction, etc., it may cause the battery to short circuit and explode.

Charging causes the battery to explode: playing with the phone while charging can lead to longer charging times. Long-term charging can cause the phone to heat up and explode more easily.

Chargers and batteries do not match: general mobile phones have original charger. Chargers of the wrong type are prone to battery accidents. Apple phones are only charged with the original charger, which greatly reduces the chance of battery self-explosion.

Too high temperature: High temperature means that the internal heat of the battery has reached its limit. Long-term charging, high temperature irradiation, and baking can easily cause the battery temperature to be too high. In the south of our country, most families use electric ovens in winter. Many people like to play with mobile phones while baking by the fire. This is also very dangerous.

Heat out of control: Lithium-ion batteries are at risk of explosion due to a process called "heat out of control" in the internal reaction of the battery. "Heat out of control" is an energy positive feedback cycle: higher temperatures cause the system to heat up, and the system heats up, which in turn makes the system hotter. The above reasons, such as short circuit of the battery, high ambient temperature, frequent overcharging, unauthorized modification of the shell, etc., will cause heat runaway of the lithium ion battery, and may eventually cause fire or explosion.

But don't worry too much. Your electronics are not a ticking time bomb. As long as there is reasonable use in peacetime, lithium batteries will work safely and reliably. Whenever the battery drops to 50, you should charge it. Lithium-ion has no memory effect, but low voltage can seriously damage them.

The page contains the contents of the machine translation.