How to charge mobile phone lithium-ion battery for the first time

1. The origin of 12-14 hours: The first generation of nickel-cadmium batteries should be charged at a small rate. Generally, the charging current is recommended to be 1/10C. For example, if your battery capacity is 600mAh, then 1C is 600mA, and 1/10C is 60mA. Therefore, it takes more than 10 hours to fully charge the battery. For nickel-cadmium batteries, charging at a small rate is beneficial. 2. The battery situation of mobile phones in 2013: all mobile phones use lithium-ion batteries. The closest thing to our impression should be the 3210 released in 1999. The nickel-metal hydride batteries are equipped. We can no longer find mobile phones with nickel-metal hydride batteries around us. Up. 3. Knowledge of lithium-ion batteries: We only talk about capacity. There are two detection methods to measure the capacity of a lithium-ion battery: 1C charge and 0.2C discharge; 0.2C charge and 0.2C discharge. No matter what charging system is used, it should meet the standard. Because the lithium-ion battery is different from the previous nickel-cadmium battery, the high rate charging of 1C can be usually accepted, and it must be accepted. And if a 600mAh battery is charged at 1C, it should be fully charged in about 1 hour. If the direct charging of the mobile phone is designed like this (mostly 0.5C-0.8C), 12-14 hours is nonsense. According to the GB/T182872000 national standard, when the constant current is charged to 4.2V, it is converted to constant voltage. When the current drops to 0.01C, the charging is considered to be terminated. For example, the charger charging current is 0.5C, charging a 600mAh battery, the charging current will drop to 6mAh in about 2 hours, and it is considered fully charged at this time. Why would it drop to 0.01C? Because it is full, this is a reflection of the battery cell. For nickel-metal hydride power, the national standard has also stipulated high-rate charging and discharging indicators. 4. What counts as activation? The lithium-ion battery itself is alive. If the design capacity is 600mAh, I will be full after charging for 2 hours, and then discharged, I can get a capacity of 600mAh. When the designed capacity is reached, it is enough. What is the problem of whether it is alive or not? The technical supervision department implements the national standard. The test capacity is charged with 1C, and then discharged. Once in 5 times, the capacity is qualified. So use it normally, charge it normally, and use the new battery as it is, don’t worry about the activation. 5. Charging for 14 hours is: Most of the mobile phone batteries produced in 2012 are lithium-ion batteries. Direct charging with the mobile phone is full in about 2 hours. This step is the result of constant current charging; the rest of the time is constant voltage charging. That is, trickle charging makes the battery capacity of the mobile phone more sufficient and the standby time is longer. Lithium-ion batteries are used in mobile phones, which have no memory effect. Generally, they can be fully charged in 2-3 hours, which is enough. If the first three charging and discharging of the new battery can really reach 12 hours or more, it will cause great damage to the battery, and may cause the battery to swell or even burn. Fortunately, both the mobile phone and the charger have protection circuits. When it is charged to 100%, it will automatically power off, and it will not continue to charge when it is plugged into the charger. However, we must all be aware of safety. At this time, it is better to unplug the charger to prevent the charger protection circuit from overcharging in case something goes wrong with the battery, causing serious damage to the battery materials and affecting the capacity and life of the 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: Introduction to the types of cylindrical lithium-ion batteries