The correct way to activate a lithium battery

In the use of lithium batteries , it should be noted that after the battery is placed for a period of time, it enters a sleep state. At this time, the capacity is lower than the normal value, and the use time is also shortened. However, lithium battery easily activated, as long as after 3-5 times the normal charge-discharge cycle battery can be activated to restore normal capacity. 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 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 overdischarge will make lithium batteries, especially liquid 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 instruction manual is the standard charging method.

At the same time, long charging takes a long time and often needs to be carried out at night. In the case of China's power grid, the voltage at night is high in many places and fluctuates greatly. As mentioned earlier, lithium batteries are very delicate, and they are much less resistant to fluctuations in charge and discharge than nickel, which in turn poses additional risks.

In addition, another aspect that cannot be ignored is that lithium batteries are also not suitable for over-discharge, and over-discharge is also disadvantageous for lithium batteries.

Tools/Materials

Lithium Batteries, NiMH Batteries, Lithium Batteries Chargers, NiMH Batteries Chargers

Steps/Methods

When to start charging in normal use,

You can often see this statement because the number of charge and discharge cycles is limited. Therefore, the battery 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 as follows:

Cycle life (10% DOD): >1000

Cycles life (100% DOD): >200 times

Among them, DOD is the abbreviation of depth of discharge. 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 you convert to the relative total capacity of the actual charge: 10% * 1000 = 100, 100% * 200 = 200, the latter's full charge and discharge is still better, but the former netizen's statement to do some correction: in normal In this case, you should reserve the charge according to the principle that the remaining battery power is used up and recharge, but if your battery is not likely to last for two hours on the second day, you should start charging in time. Of course, if you are willing Carrying the charger to the office is another matter.

You need to charge to cope with the expected inconvenience or the condition is not allowed to charge, even if the battery still has a lot of power, then you only charge in advance, because you did not really lose "1" charge cycle life, that is, " 0.x" only, and often this x will be small.

The principle of recharging the remaining battery power is not to go to extremes. One of the more widely spread arguments like long charging is that "try to run out of battery power, it is best to use automatic shutdown." This practice is actually only a nickel battery, the purpose is to avoid the memory effect, unfortunately it is also circulating on the lithium battery. The battery is too low due to excessive discharge, so that it does not have normal charging and power-on conditions.

The right way for lithium batteries

To sum up, my most important tips for charging and discharging of lithium batteries in use are:

1, in accordance with standard procedures and charging time, even the first three have to do so;

2, when there is electricity When it is too low, it should start charging as soon as possible.

3. The activation of lithium battery does not require special methods. In normal use, the lithium battery will naturally activate. If you insist on using the "first three 12-hour long charge activation" method, it will not actually work.

Therefore, all the pursuit of 12 to 16 hours of ultra-long charging and the use of lithium batteries to automatically shut down is wrong. If you have done it in the wrong way, please correct it in time, maybe it is not too late.

Precautions

Under the condition that the original charger's own protection and control circuit is of good quality, the protection of the lithium battery is quite guaranteed. So the understanding of the charging rules is the focus, and in some cases it is also possible to make some concessions. For example, if you think the battery must be charged before you go to sleep at night, you can also start charging before going to bed. The point is that you should know what the right approach is and don't deliberately follow the wrong way.