Introduce Li-ion battery charging principles and daily survival essentials

Lithium-ion battery charging theory The current accepted basic theory of lithium-ion batteries is the so-called rocking chair theory. The charging and discharging of lithium-ion batteries does not realize the transfer of electrons through traditional methods, but the energy transformation through the in and out of lithium ions in the crystals of the layered substance. In a normal charge and discharge environment, the entry and exit of lithium ions generally only causes the change of the layer spacing, but does not cause the smashing of the crystal layout. Therefore, from the charge and discharge reaction, the lithium ion battery is an ideal reversible battery. During charging and discharging, lithium ions move back and forth between the positive and negative poles of the battery, just like a rocking chair that communicates between the positive and negative poles. So some people call the lithium-ion battery a rocking chair battery. We often say that the advantages of lithium-ion batteries are related to traditional nickel-cadmium batteries (Ni/Cd) and nickel-hydrogen batteries (Ni/MH). It has the advantages of high working voltage, high specific energy, long cycle life, low self-discharge rate, and no image effect. Precautions for discharging lithium-ion batteries ●The discharge current should not be too large. Excessive current will cause a fever inside the battery, which may cause permanent damage; ●It must not be over-discharged. Li-ion batteries are most afraid of over-discharge. Once the discharge voltage is low At 2.7V, it will probably cause the battery to be scrapped. Daily maintenance and survival of lithium-ion batteries The self-discharge of lithium-ion batteries is very low, and generally can survive as long as 3 years. Survival under refrigerated conditions, the result will be better. It is a good way to store lithium-ion batteries in low-temperature places. Lithium-ion batteries can be stored for more than half a year at 20°C. This is due to its low self-discharge rate and most of the capacity can be restored. The self-discharge phenomenon of lithium-ion batteries, if the battery voltage is below 3.6V for a long time, it will cause the battery to over-discharge and crush the internal layout of the battery and eliminate the battery life. Therefore, long-lived lithium-ion batteries should be recharged every 3-6 months, that is, charged to a voltage of 3.8~3.9V (the best storage voltage of lithium-ion batteries is 3.85V or so), and should not be full. Lithium-ion batteries have a wide range of application temperatures. They can still be used outdoors in winter in the north, but the capacity will be much lower. If they return to room temperature, the capacity can be restored, subject to certain temperature effects. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What is the basic layout and rationale of the lithium-ion battery pack?