The working principle of lithium-ion battery protection chip and how to charge without protection chip?

The working principle of lithium-ion battery protection chip The lithium-ion battery that people use is actually composed of several small lithium-ion batteries connected in parallel. There are several plastic-like plates separating them in the gaps between the internal lithium-ion batteries. These small plastic boards are actually lithium-ion battery protection boards. In fact, the lithium-ion battery protection board is not made of plastic. It is composed of several non-conductive fiberboards wrapped with a layer of oil. On the other hand, we mentioned that the lithium-ion battery protection board also has the function of protecting the battery and preventing the battery from overcharging. When the external power supply continues to charge the battery quickly, the lithium-ion battery protection board will be used for protection. When the internal power of the lithium-ion battery reaches the saturation level, the internal circuit of the lithium-ion battery protection board will automatically cut off the external fast charging power supply. So that external power cannot enter the battery. This is exactly the principle that the lithium-ion battery protection board protects the battery from overcharging. We also consider the use of lithium-ion battery protection chips to protect lithium-ion batteries and prevent over-discharge of lithium-ion batteries. When the lithium-ion battery is discharged too much, the internal memory of the lithium-ion battery will undergo a qualitative change. At this time, the lithium-ion battery protection board can perceive this, so as to quickly disconnect the discharge power supply and prompt the lithium-ion battery to fail. As for the discharge of all the electricity, the internal current of the lithium-ion battery is guaranteed to be stable and the over-discharge of the lithium-ion battery is prevented. How to charge a lithium-ion battery without a protection chip? The lithium-ion battery protection chip is designed to protect the safety of the battery, that is, to prevent the battery from overcharging and exploding, and to prevent the battery from being easily damaged due to over-discharge. The lithium-ion battery protection board is a protection circuit installed on the negative terminal of the battery. Its important purpose is to prevent overcharging from damaging the battery cell, over-discharging from damaging the battery cell, and overcurrent from damaging the battery cell. If the lithium-ion battery used in these three important uses does not have a battery protection board, overcharging can be prevented by the charger protection circuit. Overcurrent is not something we have to worry about if the quality of the cell is too high. Lithium-ion batteries require the protection of charging overvoltage, discharge undervoltage, overcurrent, and short circuit. During the charging process, the problem of balanced charging of the entire group of batteries is introduced. A single-cell lithium-ion battery protection chip is introduced for any series connection. Design method of battery pack protection board with equalizing charging function for protecting groups of lithium-ion batteries. Lithium battery protection chip.jpg●It should be noted that when using a lithium-ion battery, the battery will enter a dormant state after being placed for a period of time. At this time, the capacity is lower than the normal value, and the use time is also shortened. But lithium-ion batteries are easy to activate, as long as 35 normal charge and discharge cycles can activate the battery and restore normal capacity. ●Due to the characteristics of the lithium-ion battery itself, it is determined that it has almost no memory effect. Therefore, the new lithium-ion battery in the user's mobile phone does not require special methods and equipment during the activation process. Not only is this true in theory, but from my own practice, it is best to use the standard method of charging from the beginning, which is the natural activation method. ●If the original charger's own protection and control circuit are of good quality, the protection of the 18650 lithium-ion battery is still quite guaranteed. Charge according to standard time and procedures, even the first three times. ●The temperature is suitable to prevent cold and heat. The ambient temperature for use is preferably around 25, because too high ambient temperature will cause gas to overcharge the battery, and too low ambient temperature will cause the battery to be undercharged. ●Pay attention to the charging voltage. If the charging voltage is too high, the battery will be overcharged, and vice versa, the phenomenon of undercharging will occur. This is all detrimental to the lithium-ion battery. 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 article: What factors affect the performance of lithium-ion batteries?