The 18650 lithium battery is a type of lithium-ion battery and a pioneer of lithium-ion batteries. There are many situations where the 18650 battery cannot be charged, and it is necessary to take corresponding repair methods to effectively solve the problem that the 18650 battery cannot be charged. So what are the reasons and solutions for the battery not charging?

Low-temperature lithium-ion battery is a new type of lithium-ion battery, its main feature is that it can work normally at a lower temperature (usually -10°C to -50°C), suitable for power in cold regions or low temperature environments storage and use.

Lithium batteries in laptops have no memory effect, and lithium batteries produced by regular manufacturers have a fairly complete BMS (battery management system) to control overcharging and overdischarging problems.

Li-ion battery charging in low temperature environment has certain risks. Because with the decrease of temperature, the dynamic characteristics of graphite anode become worse and worse. During the charging process, the electrochemical polarization of the anode is significantly intensified. The precipitated metal lithium is easy to form lithium dendrites, break through the diaphragm and cause the positive and negative pole short circuit. Try to prevent lithium ion batteries from charging at low temperature.

Last year, Xiaomi announced 200W power fast charging technology, and it only takes 8 minutes to fully charge a 4000mAh battery.

Compared with traditional mobile phones, smart phones are updated faster, with more and more functions such as high-definition large screens, high-pixel cameras, face recognition, etc., and the promotion and application of 4G, coupled with the improvement of people's disposable income, the shipment of smart phones continues to grow.

The tab is a raw material for lithium-ion polymer battery products. For example, mobile phone batteries, Bluetooth batteries, laptop batteries, etc. used in our lives all need to use tabs.

Lithium battery separator is one of the key inner layer components of lithium battery. The performance of the separator determines the interface structure and internal resistance of the battery, which directly affects the capacity, cycle and safety performance of the battery. The separator with excellent performance plays an important role in improving the overall performance of the battery.

As one of the current battery types for electric vehicles, LiFePO4 batteries are characterized by relatively stable thermal stability, low production costs, and long service life. However, its low temperature resistance is very low. In the case of -10 ℃, although the battery can be used normally, the charging efficiency will be greatly reduced.

LiFePO4 battery is one of the Lithium battery, Because the cathode materials of LiFePO4 batteries are mainly compounds of phosphorus, acid, iron and lithium. Generally speaking, the voltage range of LiFePO4 battery is basically between 3.2V-3.6V. Among them, the nominal voltage is 3.2V, and the high-level termination charging voltage is 3.6V. However, the positive and negative materials, electrolytes, and production processes used by various manufacturers are different, so there will be differences in performance.