What are the requirements for fast charging lithium batteries?

Do you know how to charge and discharge a fast-charged lithium battery for a longer service time? Let me take a closer look at it:

The first is charging: According to the structural characteristics of the fast-charged lithium battery, the maximum charging termination voltage should be 4.2V, and it cannot be overcharged. Otherwise, the lithium ion of the positive electrode will be taken too much, and the battery will be scrapped. The charging and discharging demand is higher, can be used for constant current, constant voltage charger to charge. Usually constant current charging 4.2V/holiday turn to constant voltage charging, when constant voltage charging current dropped to 100MA, should stop charging. Charging current (MA) = 0.1 ~ 1.5 times the battery capacity (such as 2000mah battery, the charging current can be controlled between 200 ~ 4000MA).Conventional charging current can choose at about 0.5 times the battery capacity, charging time is about 2 ~ 3 hours.

Followed by the discharge: Due to the internal structure of the fast-charged lithium battery, lithium ions cannot all move to the positive electrode during discharge, and some lithium ions must be retained at the negative electrode to ensure that the lithium ions can be smoothly inserted into the channel during the next charge, otherwise, the battery life will be shortened accordingly. In order to ensure that some lithium ions remain in the graphite layer after discharge, the minimum voltage of discharge termination must be strictly limited, that is to say, the quick-charge lithium battery cannot be over-discharged. Discharging termination voltage of 3.0 V/usually section, the lowest not less than 2.5 V/section. The length of battery discharge is related to the battery capacity and discharge current. Battery discharge time (hours) = battery capacity / discharge current. The discharge current (MA) of a fast-charged lithium battery should not exceed 3 times the battery capacity. (Such as 1000mAH battery, the discharge current should be strictly controlled within 3A) otherwise the battery will be damaged.

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