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When should I start charging the lithium battery in normal use?

Date of Issue:2020-07-15 Click:

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 and discharge cycle of lithium-ion batteries. 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 English abbreviation for 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 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 turned off automatically. 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 repair. This is actually caused by the low voltage of the battery 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, the lithium battery should be fully charged 1-2 times (normal charging time) and discharged every 3-4 months.

Lithium batteries that have not been used for a long time should be stored in a cool and dry place, with 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 fine). 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.

 

 


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