Analysis of the correct charging method of 18650 battery

It should be noted that in the use of lithium-ion batteries, the battery will enter a dormant state after being left 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, it is determined that it has almost no memory effect. Therefore, during the activation process of the new lithium-ion battery in the user's mobile phone, no other methods and equipment are required. Not only in theory, but from my own practice, it is best to choose a standard method of charging from the beginning, which is a natural activation method. Regarding the activation of lithium-ion batteries, many claims are: the charging time must exceed 12 hours, repeated three times in order to activate the battery. The statement that the first three charges should be charged for more than 12 hours is obviously a continuation of the statement that nickel batteries (such as nickel-cadmium and nickel-metal hydride). Therefore, this statement can be said to be misinformation at the beginning. The charge and discharge characteristics of lithium-ion batteries and nickel batteries are very different, and I can tell you very clearly that all the serious formal technical materials I have reviewed emphasize that overcharge and overdischarge will affect lithium-ion batteries, especially Liquid lithium-ion batteries cause huge damage. Therefore, it is best to charge according to the standard time and standard method, especially not to charge more than 12 hours. Usually, using the charging method described in the manual is the standard charging method. At the same time, long-term charging takes a long time, often at night. According to the situation of my country's power grid, the voltage at night in many places is relatively high and fluctuates greatly. As mentioned earlier, lithium-ion batteries are very delicate, and they are much less able to withstand shaking in terms of charge and discharge than nickel batteries, so this brings additional dangers. In addition, another aspect that cannot be ignored is that lithium-ion batteries are also not suitable for over-discharge, and over-discharge is also very detrimental to lithium-ion batteries. 18650 battery charging precautions_18650 battery correct charging method things/materials Li-ion batteries, nickel-hydrogen batteries, lithium-ion battery chargers, nickel-hydrogen battery chargers process/methods when normal use should start charging forums can often see This statement, because the number of charging and discharging is limited, so the battery should be used up as much as possible to recharge. But I found an experimental table about the charge and discharge cycle of lithium-ion batteries. The data about the cycle life is listed as follows: Cycle life (10% DOD): '1000 cycles (100% DOD): '200 times in between DOD is the abbreviation of Depth of Discharge. It can be seen from the table that the number of rechargeable times is related to the depth of discharge, and the cycle life at 10% DOD is much longer than that at 100% DOD. Of course, if it is converted to the relative total capacity of actual charging: 10%*1000u003d100, 100%*200u003d200, the latter's full charge and discharge is still better, but the previous netizen's statement needs to be revised: Under normal conditions, you should reserve the battery according to the remaining battery charge and recharge the rule, but if your battery cannot last for two hours on the second day, you should start charging in time. Of course you It's another matter if you are willing to carry the charger to the office. You have to charge to cope with the estimated inconvenience or the time when the condition does not allow charging. Even when the battery has a lot of remaining power, then you can just charge it in advance, because you have not really lost the life of one charge cycle, it is 0 .x times, and often this x will be very small. The criterion for recharging when the remaining battery power is used up is not to make you go to the extreme. As with long charging, a widely spread saying is to use up the battery as much as possible, and it is best to use automatic shutdown. This approach is actually only the approach on nickel batteries, the purpose is to prevent the memory effect from happening, unfortunately it is also spread on lithium-ion batteries. The battery voltage is too low due to over-discharge, so that it does not have normal charging and starting conditions. 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 are the precautions for the installation of lithium battery protection board