The correct use method of lithium battery (Part 2)

   The correct use method of lithium battery. Although lithium-ion batteries are widely used in automobiles, electric cars, mobile phones, tablets, notebooks and other devices in the near future, there may be more equipment to use it, but at present, mobile phones and devices such as equipment, is still the closest to our lithium battery power equipment. Therefore, it is necessary to make a special use of mobile phone lithium battery instructions.

1. How to charge.

 In the use of lithium batteries, we should note that the battery placed after a period of time into the dormant state, at this time the capacity is lower than normal, the use of time is also shortened. But lithium battery is easy to activate, as long as after 3-5 normal charge and discharge cycle can activate the battery, restore normal capacity. Because of the characteristic of lithium battery itself, it is decided that it has little memory effect. Therefore, in the new lithium battery activation process, we do not require special methods and equipment. Not only in theory, but in my own practice, the "natural activation" approach is best from the start by using standard methods of charging. For lithium Battery "activation" problem, a lot of saying is: Charging time must be more than 12 hours, repeatedly done three times, in order to activate the battery. The claim that "the first three charges are more than 12 hours" is clearly a continuation of nickel batteries, such as nickel cadmium and nickel hydride. So this argument can be said to be misinformation at first. The charge and discharge characteristics of lithium and NI batteries are very different, and it is very clear that all the serious formal technical data I have consulted emphasize that overcharge and discharge can cause great damage to lithium batteries, especially liquid lithium-ion batteries. Thus charging is best charged in accordance with standard time and standard method, especially not for over 12 hours of extra long charge. Typically, the charging method described in the phone's manual is the standard charging method for the phone.

In addition, lithium battery cell phone or charger after the battery will automatically stop charging, there is no nickel electric charger called "trickle" charge for 10 hours. In other words, if your lithium battery is filled, it is also white charge on the charger. And none of us can guarantee that the battery charge and discharge protection circuit features never change and the quality of the foolproof, so your battery will be long on the brink of danger hovering. That's another reason we're against long charges. In addition, on some mobile phones, charging more than a certain period of time, if not to remove the charger, then the system not only stops charging, will also start the discharge-charging cycle. Perhaps the manufacturers of this approach have their own purpose, but obviously the battery, cell phone and the life of the charger is unfavorable. At the same time, long time charging often need to be carried out at night, the voltage at night is relatively high, and fluctuations. As has been said before, lithium battery is very delicate, it is more than nickel electricity in charge and discharge of the ability to withstand fluctuations, so this brings additional danger. In addition, the other area that cannot be overlooked is that the discharge is also bad for lithium batteries. This leads to the following questions.


2 When should we start charging for normal use of lithium battery charger.

We can often see this, because the number of charge and discharge is limited, so the cell phone battery should be used as far as possible to recharge the electricity. But I found a test sheet for lithium-ion battery charging and discharging cycle, the data on cycle life are listed as follows:

Cycle Life (10%DOD): > 1000 times

Cycle Life (100%DOD): > 200 times

DoD is the English abbreviation for the depth of discharge. It can be seen from the table, the number of rechargeable and discharge is relative to the  depth, 10%dod cycle life is much longer than the 100%dod. Of course, if the relative total capacity of the actual charge: 10%*1000=100,100%*200=200, the latter full charge or discharge or to be better, but the previous netizen that said to do some corrections: Under normal circumstances, you should be charged with the remaining battery charge, but if your battery is not expected on the 2nd day of the day, you should start charging in time, of course, if you are willing to carry a charger to the office and when the vessels. The principle of the battery remaining charge is not to go to extremes. And long charge as widely circulated a saying, is "as far as possible to the cell phone battery consumption, the best use of automatic shutdown." This practice is actually just nickel battery practice, the purpose is to avoid the memory effect, unfortunately it is also spread in lithium batteries today. There has been an example of an automatic shutdown that has been used for a long time because of the low warning of cell phone battery charge. The results of this example in the mobile phone in the later charge and the boot did not respond, had to go out to take maintenance. This is because the battery due to excessive discharge of the voltage is too low, so that there is no normal charging and start-up conditions caused.


3 Important tips for correct use of lithium cell phone  

To sum up, my most important clue to the charge and discharge problem of lithium cell phone is:

1. Charge according to standard Time and procedure, even the first three times.

2. When the mobile phone battery is low, should start charging as soon as possible.

3. Lithium battery activation does not require a special method, in the normal use of mobile phone lithium battery will naturally activate.

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