What are the unsafe factors in the mobile power supply?

Unsafe factors in mobile power The structure of the charger consists of three parts: the shell, the battery and the circuit board. Customers are familiar with the charger shell. In addition to being beautiful, the shell also needs strength. Strength is reflected in strength and heat resistance. Strength Strength falls on the internal circuit board and the powerful defense of the core in an unexpected collision. Its heat resistance is manifested in accidents such as spontaneous combustion inside the power bank, which can play a certain flame retardant effect and reduce the damage caused by the accident. It can be roughly divided into two types: plastic and metal materials. In contrast, metal casings have advantages in terms of strength and heat resistance. The battery is a very critical part of the power bank. Its raw materials have a direct impact on the safety of the mobile power supply. A good battery can be used for a longer time and is relatively safe. Now, among mainstream mobile power products, we are the first ordinary battery of 18650 and polymer. From the outside, it is a cylinder of 18650, just like an extended version of no. 5. Batteries and polymer batteries are generally flat. In terms of material shape, 18650 uses liquid electrolyte, while polymer uses solid polymer electrolyte (whether dry or gel). The 18650 number representing the surface standard of the 18650 battery is 18, which means that the battery diameter is 18.0mm, and 650 means that the battery height is 65.0mm. There are usually three kinds of batteries, imported, domestic and second-hand. This time, the imported batteries are of higher quality processed by large foreign manufacturers such as Sanyo and Samsung. The domestic 18650 battery is the first battery processed by a domestic brand manufacturer, and the overall level must be separated from that of foreign ones. Second-hand telecommunications, also known as electro-mechanical cores, refer to the old products assembled from scratch in the past. This kind of battery is the culprit of many mobile power explosions and burning objects in recent years. Due to the low cost of 18650 batteries, many mobile power manufacturers are using 18650 batteries, and some even choose inferior 18650 batteries in order to reduce the price and cost. The 18650 battery is made of liquid electrolyte. The mobile power supply of the 18650 battery will cause the internal voltage to rise sharply in the charging state. If it encounters vibration and bumps, it is easy to cause electrolyte leakage, corrode the circuit board, and cause failure. Polymer batteries are usually made of a mixture of lithium cobalt oxide, lithium manganate and ternary lithium, and they are also afraid of leakage and short circuits. But it is safer than 18650. Assuming that a large-capacity mobile power supply, such as greater than 8000mAh, consists of multiple 18650 batteries in parallel, once the explosion has serious consequences, and the polymer battery will not explode, flames will occur in severe cases. The important function of the circuit board is the control of voltage and current during the input and output process, and it can also terminate other functions such as lighting and lightning. A good circuit board can increase the conversion rate, reduce the impact of the charging resistance on charging, and make the best use of the power bank. Excellent circuit design protects the battery, reduces loss and heat, converts battery energy into output energy to the greatest extent, and achieves voltage stabilization and flow stabilization. A good circuit board can automatically adjust when the power is overcharged or discharged, and automatically turn off the charging function after charging, which can protect the charging safety of mobile phones and other devices. 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 post: What are the types of customized lithium battery cells?