How to charge lithium ion power battery？
How to storage lithium-ion power battery？
Before understanding how to charge the lithium-ion power battery, let's take a look at the storage method of the lithium-ion power battery.
The lithium-ion power battery needs to be fully charged and stored. It can be stored at 20°C for more than half a year, which shows that lithium-ion power batteries are suitable for storage at low temperatures. It has been suggested to store rechargeable batteries in the freezer compartment of the refrigerator, which is indeed a good idea. Lithium-ion power batteries have a self-discharge phenomenon. Long-term storage will lead to over-discharge of the battery and damage to the internal structure of the battery, reducing battery life. Therefore, long-term storage of lithium-ion power batteries should be replenished every 3-6 months, that is, charging to a voltage of 3.8-3.9V (the best storage voltage of lithium-ion batteries is about 3.85V).
The use of lithium-ion batteries, pay attention to three points
How to charge lithium ion power battery?
For the "activation" of lithium-ion power batteries, there are many sayings: the charging time must be more than 12 hours, and it must be repeated three times in order to activate the battery. This statement that "the first three charges should be charged for more than 12 hours" is obviously a continuation of the statement from nickel batteries (such as nickel-cadmium and nickel-metal hydride). Therefore, this statement can be said to be misrepresented from the beginning. The charging and discharging characteristics of lithium-ion power batteries and nickel batteries are very different. All serious official technical documents emphasize that overcharge and overdischarge will cause huge damage to lithium batteries, especially liquid lithium-ion batteries. Therefore, it is best to charge according to the standard time and standard method, especially not to charge for more than 12 hours. In addition, lithium-ion power batteries or chargers will automatically stop charging after the battery is fully charged, and there is no so-called "trickle" charging that lasts for more than 10 hours for nickel-electric chargers. That is to say, if your lithium-ion power battery is fully charged, it will also be white-charged on the charger. And no one can guarantee that the characteristics of the charging and discharging protection circuit of the battery will never change and the quality will be foolproof, so the battery will be on the verge of danger for a long time. This is another argument against long charging.
Because the number of charges and discharges is limited, the lithium battery should be recharged as much as possible. However, the experimental table data about the charge-discharge cycle of lithium-ion batteries are listed as follows:
Cycle life (10%DOD):>1000 times
Cycle life (100%DOD):>200 times where DOD is the English abbreviation of depth of discharge. It can be seen from the table that the number of rechargeable times is related to the depth of discharge, and the cycle life at 10% DOD is much longer than that at 100% DOD. Of course, if it is converted to the relative total capacity of actual charging: 10%*1000=100, 100%*200=200, the latter's full charge and discharge is still better. Under normal circumstances, you should reserve according to the remaining battery capacity. Charge it on the principle of recharging after the power is used up, but if it is expected that it is impossible to last 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 will be another matter.
When charging is required to cope with the upcoming important event that is expected to cause heavy communication, even when the battery still has a lot of remaining power, just charge it in advance, because there is no real loss of "1" charge cycle life, which is "0.x" times only, and often this x will be very small.
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