Lithium batteries can be roughly divided into two categories?

Conventional lithium battery: A typical example of this battery is the 18650 lithium battery, which often appears in various charging banks (mobile power). The battery is named after its shape (diameter 18mm, height 65mm, cylindrical shape), and has become a fighter in the lithium battery market due to its low cost and durability. Traditional lithium batteries and other traditional batteries, because they contain the electrolyte to process electrons (because the battery charge and discharge is essentially a directional movement of electrons), so they need a certain packaging size (sometimes unportable) and difficult cases to protect the electrolyte. Lithium-ion polymer battery: Today, all portable electronic devices such as mobile phones, tablet computers and most notebook computers use this battery. Lithium-ion polymer batteries require a small amount of liquid electrolyte due to the polymer series battery structure, so they do not need hard shell protection, the shape is not restricted, and the packaging volume can be greatly reduced. Based on these characteristics, lithium-ion polymer batteries are used in many electronic products. These electronic products are simple and require device thickness, and are likely to replace traditional lithium batteries. Why is a lithium battery a bomb? The initial article described the explosion of the Samsung Galaxy Note 7. Samsung later proved that the explosion of mobile phones is closely related to the defects of the planned lithium battery, and electronic products have shown blasting in recent years (for example, Sony laptops are currently blasted in 2006. Sony finally led to a global recall of defective products), all but the explosion of lithium batteries. From a chemical point of view, there are many reasons for the explosion of lithium batteries, and a considerable part of the reasons have a lot to do with the manufacturer's planning flaws. As we all know, the blasting of a battery short circuit is an important reason (that is, the battery using an electrical circuit, so the phenomenon of excessive current in the battery in a short period of time), and overcharging is still a battery short circuit (another important reason for the explosion of lithium batteries) The reason is that the battery voltage is higher than the set upper limit), which can cause a large amount of heat and gas to accumulate in the lithium battery in a short period of time (gas will appear when the lithium battery is running). In order to release the pressure, the lithium battery either activates the internal pressure relief device or opens the casing, both of which will cause the internal data of the battery to contact the air and then burn. Generally speaking, blasting and incineration of lithium batteries are rarely due to external circuit problems, which means that most of the blasting and incineration of lithium batteries are due to defects in the internal planning of the battery. For example, in the aforementioned Sony laptop battery explosion case, metal impurities were detected in the electrolyte part of the battery in question. This is because the metal impurities formed unexpected conductivity and formed an internal short circuit. Similarly, the ignition of the lithium battery of the Boeing 787 is also related to the fact that the electrolyte function of the aircraft battery is greatly reduced under special circumstances, resulting in internal short circuits. Of course, in the two cases of lithium battery explosion and incineration, traditional lithium batteries are involved. In this case, the protagonist is a lithium-ion polymer battery. So in this case, what are the special features of lithium ion polymer batteries? In fact, in general, lithium ion polymer batteries do not have a hard shell, and the possibility of violent blasting and incineration has been greatly reduced. When the battery of blasting occurs, due to the poor impact resistance of the shell and premature blasting, it usually shows slow burning after blasting. However, the high degree of variability in the shape of lithium-ion polymer batteries allows equipment manufacturers to plan more freely, and often requires additional planning for parts of the battery pack. In this way, it is difficult to prevent the battery pack from being unclear and causing trouble. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Lithium battery and hydrogen fuel power battery have their own advantages and disadvantages