Introduction to the use and maintenance of lithium-ion batteries

Date:2019-04-01 16:58
When using lithium-ion batteries, it should be noted that after a period of storage, the battery enters a dormant state. At this point, the capacity is below normal, and the usage time is also shortened. But lithium-ion batteries are very simple to activate, as they can be activated and restored to normal capacity after 35 normal charging and discharging cycles. Due to the inherent characteristics of lithium-ion batteries, they have almost no recall effect. Therefore, during the activation process of new lithium-ion batteries in users' mobile phones, special methods and devices should not be used. Special lithium-ion battery chargers should be used for charging lithium-ion batteries. Lithium ion batteries are charged using a constant current/constant voltage method, starting with constant current charging and changing to constant voltage charging when approaching the cutoff voltage. Like a battery with a capacity of 800mA. h, where the stop charging voltage is 4.2V. The battery is charged at a constant current of 800mA (charging rate of 1C). At the beginning, the battery voltage increases with a large slope. When the battery voltage approaches 4.2V, it is changed to 4.2V constant voltage charging. The current of lithium-ion batteries gradually decreases, and the voltage change is not significant. When the charging current drops to 1/10C (about 80mA), it is considered to be close to overcharging and charging can be stopped (some chargers start the timer after 10C, and charging will be completed after the time has passed). It is not possible to charge lithium-ion batteries with chargers that charge nickel cadmium batteries (three nickel cadmium batteries) (although the rated voltage is the same, both are 3.6V). Due to different charging methods, it simply constitutes overcharging.