Analysis of the first charging method of lithium battery

1. New lithium batteries usually have a certain amount of power when they are in hand, and they can be used immediately, rather than having to be charged before use. From the theoretical and practical point of view, the first charge of lithium batteries is to recharge after use or recharge. The effect is exactly the same. However, it should be noted that lithium batteries with a delivery date of more than half a year are best charged first, because the power is too low at this time. Separate the lithium battery from the charger immediately after stopping charging of the lithium battery. Lithium batteries will automatically stop charging after overflowing (temporarily), and there is no trickle charge that continues for a long time. This is the difference between lithium batteries and nickel-cadmium batteries. After the charger overflow indicator light is on, if it is not removed immediately, due to the battery self-discharge and the lithium battery protection IC still has a small current passing, the lithium battery voltage will drop to a voltage value that can be charged and then recharged (because at this time The charger is not removed), after another round of charging voltage drop and recharging, the lithium battery is in the process of countless charging and discharging cycles, which will eventually damage the lithium battery and affect the life of the lithium battery. 2. The choice between power-off charging and power-on charging (actually the difference between plug-in charging and cradle charging) does not need to be deliberate, because the impact on battery performance is the same. Some lithium batteries are designed to be charged in standby mode, but this The situation is relatively rare. 3. As far as electronic equipment is concerned, the charging time of lithium batteries is generally 2~4 hours. The first charging time of new lithium batteries may be longer because there is no loss of capacity. As a result, it is sufficient to charge more. It is also useless. The reason has already been mentioned above. If it has to say what uses it has, it is also a side-use. The first charging time of lithium batteries is often transformed into the concept of activation. In some lithium battery manuals, the requirement of using lithium batteries for three full charge and discharge for the first time seems to be activated, but the real purpose is not the same as that of nickel-hydrogen batteries to eliminate the memory effect. The important thing is to eliminate passivation, that is, some lithium crystals will appear during the transfer process of lithium batteries for up to 3 to 6 months, which will affect the activity. The process of eliminating passivation can be carried out during the first charge of the lithium battery, or it can be completed in a normal working environment, without deliberately doing it. 4. Overflowing: There is no activation problem when using lithium batteries for the first time. The reason is that the charging and discharging characteristics of lithium batteries and nickel-hydrogen batteries are very different. The deeper reason is that overcharging will affect the lithium battery. In particular, liquid lithium batteries cause great damage. Therefore, charging should be carried out according to standard time and standard methods, and never over-long charging. 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: How to improve the high temperature performance of lithium batteries