List the rumors about lithium batteries charging

Some people say that cell phone batteries need to be used up before charging. It was also said that the previous batteries had to be recharged for 12 hours. Others say it's bad for batteries to have a charger for a long time. Whether or not these arguments are correct, this article will discuss the correctness and error of these arguments from a scientific point of view, so that there is no place for rumors to hide.

Let's see where these rumors come from first.

Some of the rumors about lithium batteries actually come from nickel batteries. The concepts of "memory charge" and "trickle-down charge" are all derived from nickel batteries. Nickel batteries do need to be filled and used up every time. However, almost 100 % of appliances on the market now use lithium ion batteries. Therefore, the "rules of use" for nickel batteries have long since ceased to apply, so that false rumors have become rumors of lithium batteries.

Lithium-ion batteries have evolved from the original lithium-cobalt batteries to the current lithium-manganese and lithium-iron batteries.

Compared with the nickel-cadmium batteries, nickel-metal hydride batteries, and lead batteries that have appeared before, lithium-ion batteries have the advantages of high energy density, small environmental pollution, and stable discharge platforms.

What "personality" does lithium-ion battery have?

How to better use lithium-ion batteries? This starts with the discharge plate of a lithium-ion battery.

It is seen that more than 40 % of the discharges are basically stable, and batteries with low power levels are inherently unstable. In general, when there are 30 to 40 % left, they can be charged. What is more important is that overcharging and over discharge will cause changes in the internal material characteristics of the battery, resulting in irreversible capacity losses. Therefore, there is no need to overcharge and discharge like a nickel battery. However, manufacturers now have protection in this area. After being fully charged, the mobile phone will automatically cut off the charge to protect the battery.

As for the "electricity memory" is even more impossible, that is the characteristics of nickel batteries. Although the lithium battery also has a cycle of charging and discharging, its cycle calculation method is flexible. Unlike a nickel battery, if it is not used again, it will not be used again.

For a simple example, if you last used a battery of 40 inches of electricity, the battery was fully charged, and the next time you used 60 inches of electricity, the two charge and discharge uses were exactly the same. A complete charging cycle, And not two.

As for battery activation, lithium-ion batteries themselves must be charged at constant pressure before they are delivered, and then discharged. Such several cycles allow the electrodes to fully infiltrate the electrolyte and fully activate until the capacity meets the requirements. The lithium ion battery that comes out of this is already activated on the user's hand. Only after a long period of time does not need to be fully charged and discharged again to activate the battery.

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