What are the methods of using lithium-ion batteries?
Instructions
1. How to charge a new battery,
In the use of lithium batteries, it should be noted that after the battery is left for a period of time, it will enter the dormant state. At this time, the capacity is lower than the normal value, and the use time is also shortened. But the lithium battery is easy to activate, as long as 3-5 normal charge and discharge cycles can activate the battery and 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.
Regarding the issue of "activation" of lithium batteries, many claims are: the charging time must be more than 12 hours, repeated three times in order to activate the battery. This statement of "the first three charges should be charged for more than 12 hours" is obviously a continuation of the statement of nickel batteries (such as nickel-cadmium and nickel-metal hydride). So this statement can be said to be misinformation at the beginning. The charging and discharging characteristics of lithium batteries and nickel batteries are very different, and I can tell you very clearly that all the serious official technical materials I have consulted emphasize that overcharge and overdischarge will affect lithium batteries, especially liquid lithium. Ion batteries cause great damage. Therefore, it is best to charge according to the standard time and standard method, especially not to charge for more than 12 hours (the charger shows that it is full).
In addition, the lithium battery or the charger 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 in the nickel battery charger. In other words, if your lithium battery is fully charged, it is also white charged on the charger. And none of us can guarantee that the characteristics of the battery's charging and discharging protection circuit will never change and the quality will be foolproof, so your battery will be on the verge of danger for a long time. This is another reason why we oppose long charging.
In addition, another aspect that cannot be ignored is that lithium batteries are also not suitable for overdischarge, and overdischarge is also very detrimental to lithium batteries.
2. When should charging start in normal use
You can often see this statement, because the number of charging and discharging is limited, so the battery of the mobile phone should be used up as much as possible to recharge, in fact, the life of the lithium battery has nothing to do with this. Here is an example of an experimental table about the charge-discharge cycle of a lithium-ion battery. The data about the cycle life is listed as follows:
Cycle life (50%DOD)>1000 times
Cycle life (100%DOD)>500 times
Among them, DOD is the 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, but the previous netizen's statement needs to be corrected: in normal In this case, you should reserve the battery according to the principle of recharging when the remaining battery power is used up, but if your battery is not likely to last the entire day on the second day, you should start charging in time. Of course, if you are willing to carry it back It's another matter of bringing the charger to the office.
The principle of recharging the remaining battery power is not to make you go to extremes. A saying that is as widespread as long-term charging is to "use up the battery as much as possible." This approach is actually only done on nickel batteries, the purpose is to avoid the memory effect, unfortunately it is also spread on lithium batteries. There was an example where someone continued to use the phone without charging after a warning that the battery level of the mobile phone was too low, until it was automatically shut down. As a result, the mobile phone in this example did not respond during subsequent charging and booting, and had to be sent to customer service for overhaul. This is actually caused by the battery's low voltage due to over-discharge, so that it does not have normal charging and starting conditions.
Do not charge the mobile phone lithium-ion battery too full or use it to the point of no electricity. Charge the battery before it runs out, and it will not cause damage to the battery. Charging should be within 2-3 hours, not necessarily full. However, you should fully charge the lithium battery 1-2 times (normal charging time) and discharge it every 3-4 months or so.
Lithium batteries that have not been used for a long time should be stored in a cool and dry place, in a half-charged state (70-80% of the full charge, if your mobile phone displays 4 cells when it is fully charged, then 3 cells are sufficient). Fully charged storage is dangerous and the battery will be damaged, and the battery will be destroyed if stored without power. Every 3-6 months, check whether you want to recharge.
Lithium-ion batteries can be divided into liquid lithium-ion batteries and polymer lithium-ion batteries according to the electrolyte. The electrolyte of polymer lithium-ion batteries is colloidal and will not flow, so there is no leakage problem and it is safer.
