How long does a new lithium battery take to charge for the first time?

There are many places where we use batteries in our lives. The new lithium batteries used very widely, but many people first get a new lithium battery on the question of how to charge the battery, and made difficult. Need to charge for 12 hours? 

  First, how does a new lithium battery charge for the first time? Teach you the correct filling method of the new lithium battery. 

　In the use of lithium battery, it should be noted that after the battery is placed for a period of time, it will enter the sleep state. At this time, the capacity is lower than the normal value, and the use time is also It is shortened accordingly. However, the lithium battery is easy to activate, as long as the battery is activated after 3 to 5 normal charge and discharge cycles, and the normal capacity is restored. Due to the characteristics of the lithium battery itself, it is determined that it has almost no memory effect. Therefore, the new lithium battery in the user's mobile phone does not require special methods and equipment during the activation process. Not only in theory, but from my own practice, it is best to use a standard method of charging this "natural activation" method from the beginning. 

　For the "activation" problem of lithium batteries, there are many sayings: charging time must be more than 12 hours, repeated three times in order to activate the battery. This statement that "the first three charges have to be charged for more than 12 hours" is obviously a continuation of nickel batteries (such as nickel cadmium and nickel hydride). So this kind of 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 it is very clear to tell you that all the serious formal technical information I have reviewed emphasizes that overcharge and over discharge 

　It will make lithium batteries, especially liquids. Lithium-ion batteries cause great damage. Therefore, charging is preferably done in accordance with standard time and standard methods, especially for ultra-long charging of more than 12 hours. Usually, the charging method described in the mobile phone manual is a standard charging method suitable for the mobile phone. 

　Another way to charge new lithium batteries 

　Battery can often be seen on the forums of some websites, because the number of charge and discharge is limited, so the battery power of the mobile phone should be recharged as much as possible. But I found an experimental table on the charge and discharge cycle of lithium-ion batteries. The data on cycle life are listed below:

　Cycle life: 10% DOD>1000 times, ?100% DOD cycle life: >200 times. DOD is the abbreviation of discharge depth. As can be seen from the table, the number of chargeables is related to the depth of discharge, and the cycle life at 10% DOD is much longer than that of 100% DOD. Of course, if it is reduced to the actual total capacity of the charge: 10% * 1000 = 100, 100% * 200 = 200. 

　The latter a full charge and discharge, or better than some, but in front of friends do say that some of the amendments: Under normal circumstances, you should have reservations 

　In accordance with the principle of charging run out of battery charge remaining recharge, but if your battery When you don't expect to stick to the whole day on the second day, you should start charging in time. Of course, if you are willing to carry the charger to the office, it is a different matter. 

　Teach you the correct charging method for lithium battery: ( 

　1) Standard charging method: charge with constant current of 0.2C5 until the battery terminal voltage is 4.20V, and change to constant voltage charging. When the charging current is <0.01C5, it is considered full. 

　The standard charging method is often used for calibration of battery capacity, which is rarely used in daily use because it is too slow to charge. 

　(2) Fast charging method: charging with 1C5 constant current until the battery terminal voltage is 4.20V, changing to constant current charging, to charging current <0.01C5. 

　Precautions for fast charging method: 

　1 The initial charging current should not be too large, so as to avoid overheating of the battery and leakage and bursting. 

　2 When the battery terminal voltage reaches 4.20V, it must be switched to constant voltage immediately. The voltage requirement is high (error <0.5%), and must be measured with more than four and a half multimeters. 

　Second, the use of lithium battery 3 misunderstanding: 

　Misunderstanding 1: Overcharge and discharge, will cause the battery to explode. 

　The correct method: the mobile phone has a safety protection circuit and a variety of safety devices, as follows: a, excessive charge and discharge or short circuit, automatically cut off the battery circuit; b, when the internal pressure of the battery is too high, trigger the decompression of the exhaust device; c, battery temperature When it is too high, the hot melt protection device is triggered to stop the electrochemical reaction of the battery.

　Myth 2: The initial charging time is greater than 12 hours to activate the battery. 

　The correct way: Lithium-ion battery only needs to be fully charged to activate the battery. 

　Myth 3: The number of times the battery is charged and discharged is limited. The battery should be used up as much as possible or full. 

　The correct method: Different battery products require different methods to charge, must be used in strict accordance with the product description. In the past, nickel-cadmium batteries and nickel-hydrogen batteries required long-term charging to "activate" the battery. However, current lithium-ion batteries have been activated before leaving the factory, so there is no need to run out of power. 

　Third, discarded lithium-ion batteries, useless batteries also have "use", lithium-ion battery waste utilization methods: in the life of some used batteries, in fact, you can use a box to collect them, some companies on the Internet can recycle used batteries After collecting a certain amount, contact them and let the company specializing in used batteries use technology to dispose of the old batteries, so that the batteries will not be polluted. However, in our lives, there are few places where batteries can be recycled. You can consult them to see if some electronics companies and manufacturers can recycle this type of batteries. This way, your own garbage disposal, the company's manufacturers can also turn waste into treasure. 

　Fourth, how to maintain the lithium battery: Want to maintain the lithium battery, extend its life, usually can do this: 1. Do not deliberately ensure that each time the power is recharged; 

　2. A period of time can be done under the control of the protection circuit Deep charge to correct the battery's power statistics, but this will not increase the actual capacity of your battery. 

　3. Long-term unused batteries should be placed in a cool place to reduce the speed of their internal passivation reaction. 

　4. The protection circuit is also unable to monitor the self-discharge of the battery. The battery that has not been used for a long time should be charged with a certain amount of electricity to prevent the battery from being over-discharged due to excessive discharge during storage. 

　In fact, there is not much use in the battery to pay attention to, in other words, it is not too much to consider. How many times a battery can be used? Perhaps it is more different from the individual differences in the manufacture of the battery itself, rather than the method of use. Choosing a mobile phone brand with good reputation is undoubtedly one of the guarantees for the long life of battery use.