NASA has conducted a special study on how to extend battery life. The results of the study show that the more full the battery is charged, the greater the loss will be. If lithium battery power is kept in the middle state, the battery life will be longer. This means that neither recharging the lithium battery to 100%, nor depleting the battery, the smaller the charge and discharge interval, the better.

Do you understand the common charging methods for lithium battery charging?

1. Constant-current charging: constant-current charging is the most common way to charge the battery during the charging process, and constant-current charging is commonly used in chargers.

2. Constant current and constant voltage charging: the charging voltage is the line voltage that the battery can withstand, and the current is the set constant current.

3. non constant current charging: linear power supply, simple control circuit, low cost.

In order to avoid overcharging, it is necessary to control or terminate the charging process when necessary or when charging is completed. There are 4 common charging control methods:

1. Time control: By setting a certain charging time to control the charging terminal, generally according to the charging capacity of 120% ~ 150% of the corresponding time required to control.

2-delta V control: When the battery is charged, the battery voltage will reach a peak, and then the voltage will drop. When the voltage drops to a certain value, the charge is stopped.

3. Peak Voltage Control: The terminal point of charging is judged by detecting the voltage of the battery. When the voltage reaches the peak value, the charging is terminated.

4. TCO control: stop charging when the battery temperature rises a certain value.