18650 lithium battery charging method and maintenance method

Correct Lithium Battery Charging Method 1. High-voltage charging: There is no special control circuit for this charging method. The battery with the protection board is directly charged from the 5V power supply, which depends entirely on the high voltage limit of the protection board. The characteristic is that the current is very large at the beginning, and then gradually decreases, and there is a floating charge at any time; most of the ones that can be blown up are this kind. It is usually used to insert the card MP3 and so on in the low-level. The words like the charging circuit of the machine should be a lot of things, it should be done but not done more; 2, constant voltage charging: this method is similar, the constant voltage is actually the limit, set a relatively accurate maximum voltage, and then Lie down until the charge is less than 4.2V, which is called stupid. If this charger does a very accurate cut-off voltage, it is low and safe. On the contrary, if it is too high, it still depends on the protection board. As for the bare cell since then. Commonly used are mobile phone universal charging and flashlight charging. This charger costs less than $1, all of which are inferior parts of the building. The retail price of Taobao ranges from 2.00 to 15.00. How long can it be used? 3. Constant current charging, this This method still comes from a circuit. In order to limit the maximum charging current, constant current, constant voltage, current limit, and voltage limit are stupid sons and fools. This kind of circuit is more popular, such as digititan, and Xinyu's flow, full of After the incomplete period, with the trickle of floating, now think about it, long-term low-current charging is one of the reasons for the flatulence of 18650 lithium batteries. 4. Smart charging: It is currently considered to be an ideal charging management method. It follows the charging algorithm described at the beginning of this section and is integrated in a small chip IC. The peripheral circuit is simple, stable and reliable, such as tp4054/4055/4056/4057, tp4002/5000, MAX1879, etc. The important feature of this chip is that it can monitor voltage and current at the same time when judging whether it is full. Stop charging at 4.2v, or the charging current is less than 0.01c (usually around 50mA). Stop completely after charging, don't charge by dripping, monitor the voltage at any time. If the voltage of the 18650 lithium battery drops to a certain value, it will start charging. Do not use special methods to activate the lithium battery. The lithium battery will be naturally activated during normal use. If you insist on using the popular first three 12-hour charging activation method, it will actually not work. In the case that the original charger has good protection and control circuit quality, the protection of the 18650 lithium battery is guaranteed. Charges according to standard time and procedures, even the first three times. 18650 lithium battery maintenance method ● The temperature is appropriate to prevent cold and heat. It is best to use an ambient temperature of about 25, because too high ambient temperature will cause gas to overcharge the battery, and too low ambient temperature will cause the battery to overcharge. The correct way to use 18650 lithium batteries is the most important one, because incorrect charging methods can cause safety problems. The impact of discharge and daily maintenance is only the service life of the lithium battery, and the lithium battery itself is also a material. No matter what way we can prevent the loss, in the end, we use the right way to delay aging. ●In order to give full play to the maximum efficiency of lithium batteries, we must use them frequently to keep the electrons in the lithium battery in a flowing state. If you don't use lithium batteries frequently, please remember to complete the charging cycle of lithium batteries once a month and do a battery calibration, that is, deep charge. ●Pay attention to the charging voltage. If the charging voltage is too high, the battery will be overcharged; otherwise, the battery will be undercharged, which is harmful. Pay attention to the 18650 lithium 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 post: Pay attention to capacity and anti-counterfeiting when purchasing mobile phone lithium batteries