What are the ways to charge the lithium battery for the first time?

Lithium battery charging method: ⑴Standard charging method: use 0.2C5 constant current to charge the battery terminal voltage to 4.20V, change to constant voltage charging, until the charging current u003c0.01C5 is regarded as overflow. The standard charging method is often used for the calibration of battery capacity. Because the charging is too slow, it is rarely used in daily use. ⑵Fast charging method: charge with 1C5 constant current until the battery terminal voltage is 4.20V, change to constant current charge, until the charging current is u003c0.01C5. Precautions for the fast charging method: ①The initial charging current should not be too large to prevent the battery from overheating, leaking, and bursting. ②When the battery terminal voltage reaches 4.20V, it must be switched to constant voltage immediately. The voltage requirement is relatively high (error u003c0.5%), and it must be measured with a four-and-a-half-digit multimeter. Lithium battery discharge method: (1) Standard discharge method: discharge at a constant current of 0.2C5 until the battery terminal voltage is 2.75V. Because it is difficult to meet this condition in daily use, it is of little significance. This method is mainly used for the calibration of battery capacity. ⑵Fast discharge method: Because the internal resistance of lithium battery is very small, high current discharge is allowed. At room temperature, it can discharge at 1C5 current for more than 54 minutes (above 90%); 1.5C5 discharge time is more than 30 minutes; 2C5 discharge time is 23 minutes Above; and allow short-term larger current discharge. How long does it take to charge the lithium battery for the first time? 1. Regardless of whether the lithium battery is a new battery or not, it can be unplugged and used. Generally, it will be full after 2-4 hours. Do not charge for more than 8 hours to 12 hours, which is harmful. It is not helpful; 2. When the phone battery is too low prompt, you should try to start charging as soon as possible; 3. The activation of the lithium battery does not require special methods, it has been activated before the battery leaves the factory. If you insist on using the circulated first three 12-hour long charge activation methods, it will actually not be effective. The most important tips for the charging and discharging problems of lithium battery mobile phones in use: 1. Charge according to the standard time and procedure, even if it is the first three times, first plug the charger (line charging) into the power source and then plug the charger Plug the mobile phone charging port into the output end of the mobile phone (switching and charging can be done) 2. When the mobile phone battery is too low prompt, you should try to start charging as soon as possible; the lithium battery is most easily damaged in the case of over-discharge! 3. The activation of the lithium battery Don't take any special measures, the lithium battery will be naturally activated during normal use of the mobile phone. Is it necessary to charge the lithium battery for 12 hours the first three times? Does the lithium battery need to be activated? The correct charging method of the lithium battery Regarding the activation of the lithium battery, many opinions are: the charging time must be more than 12 hours, repeat three times in order to activate the battery . This statement that the first three charges should be charged for more than 12 hours is clearly a continuation of the statement that nickel batteries (such as nickel-cadmium and nickel-metal hydride). So this statement can be said to be misinformation at the beginning. The charge and discharge characteristics of lithium batteries and nickel batteries are very different, and I can tell you very clearly that all the serious official technical materials I have consulted emphasize that overcharge and overdischarge will affect lithium batteries, especially liquid lithium. The battery causes great damage. Therefore, it is best to charge according to the standard time and standard method, especially not to charge for more than 12 hours. Usually, the charging method analyzed in the mobile phone manual is the standard charging method suitable for the mobile phone. In addition, lithium battery mobile phones or chargers will automatically stop charging after the battery overflows, and there is no such thing as a trickle charge of nickel battery chargers that continues for 10 hours. In other words, if your lithium battery is overflowing, it will be white charged on the charger. And none of us can guarantee that the characteristics of the battery's charging and discharging protection circuit will never change and the quality will be foolproof, so your battery will be on the verge of danger for a long time. This is another reason why we oppose long charging. In addition, on some mobile phones, after charging for more than a certain period of time, if the charger is not removed, the system will not only stop charging at this time, but also start a discharge-charge cycle. Perhaps the manufacturer of this approach has its own purpose, but it is clearly detrimental to the life of the battery and mobile phone/charger. 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 batteries are very delicate, and their ability to withstand fluctuations in charge and discharge is much worse than that of nickel batteries, so this brings additional dangers. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.