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The correct charging method for ternary lithium batteries

1. Using a matching charger, fully charge the ternary lithium battery and charge it for an hour.

2. Discharge to about 20% remaining before charging, excessive discharge will damage the ternary lithium battery.

3. Try to fully charge ternary lithium at once.

The correct charging method for lithium batteries

1、 New battery charging

A new battery usually needs to be activated, and after being left for a period of time, it will enter a sleep state. At this time, the capacity is lower than the normal value, and the usage time is also shortened, so activation is necessary. The activation method for lithium batteries is very simple. After 35 normal charging and discharging cycles, the battery can be activated and its normal capacity can be restored.

2、 Old battery charging

Charging method. Old batteries refer to batteries that have been charged and discharged multiple times, rather than discarded batteries. The lifespan of a lithium battery is independent of the number of charging and discharging cycles. It has no memory effect, and no matter how you charge it, it will not affect the number of charging cycles. Therefore, do not charge the battery until it is completely dead. It is best to try to fully charge the battery when you can, and the charging time should be within 2-3 hours. Of course, you do not necessarily have to fully charge it.

The charging and discharging principles of ternary lithium batteries

1. Charging of ternary lithium batteries

The maximum charging termination voltage for a single lithium battery is 4.2V and cannot be overcharged, otherwise the battery will be scrapped due to the loss of too much lithium ions from the positive electrode. When charging lithium batteries, dedicated constant current and constant voltage chargers should be used. First, charge the battery with constant current until the voltage at both ends of the battery is 4.2V, and then switch to constant voltage charging mode; When the constant voltage charging current drops to 100mA, the charging should be stopped.

The charging current (mA) can be 0.1-1.5 times the battery capacity, for example, for a 1350mAh lithium battery, the charging current can be controlled between 135mA and 2025mA. The conventional charging current can be selected at around 0.5 times the battery capacity, and the charging time is about 2-3 hours.

2. Discharge of ternary lithium batteries

Due to the internal structure of lithium batteries, during discharge, not all lithium ions can move towards the positive electrode, and a portion of lithium ions must be retained at the negative electrode to ensure smooth insertion of lithium ions into the channel during the next charge. Otherwise, the battery life will be shortened. In order to ensure that there are some lithium ions left in the graphite layer after discharge, it is necessary to strictly limit the minimum voltage for discharge termination, which means that lithium batteries cannot be over discharged. The discharge termination voltage of a single lithium battery is usually 3.0V, and the minimum cannot be lower than 2.5V. The length of battery discharge time is related to battery capacity and discharge current. Battery discharge time (hours)=battery capacity/discharge current, and the discharge current (mA) of a lithium battery should not exceed three times the battery capacity. For example, for a 1000mAh lithium battery, the discharge current should be strictly controlled within 3A, otherwise it may cause damage to the battery.

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