How do you charge 18650 batteries.
18650 lithium batteries themselves have a certain degree of self discharge, and there is also microampere level power consumption on the protection board. Therefore, in long-term storage, we need to regularly charge 18650 lithium batteries. Today, let's take a look at the three major charging methods for 18650 lithium batteries.
1、 Intelligent charging:
This is currently considered an ideal charging management method, following the charging algorithm mentioned at the beginning of this section, integrated into small ICs, with simple peripheral circuits, stable and reliable, such as TP4054/4055/4056/4057, TP4002/5000, MAX1879, etc. The main feature of this chip is to simultaneously monitor voltage and current when determining whether it is fully charged, stop charging, or stop charging when the charging current is less than (usually around 50mA), completely stop charging after being fully charged, without trickle floating charging, but constantly monitor voltage, and start charging when the battery voltage drops to a certain value.
2、 Constant voltage charging:
This method is similar to a method where constant voltage is actually used to limit the pressure, set a relatively correct high voltage, and then kill the voltage. Without swearing, people in the martial arts world call it a fool to charge. The charger correctly stops the voltage in reverse, and low is actually safe, while high relies on a protective board. Bare batteries are now common for universal charging of mobile phones and direct charging of flashlights. The cost of this charger is less than one yuan, and it is made up of inferior parts. The retail price on Taobao is different, so it cannot be said how much it can be used.
3、 Constant current charging:
This method still originates from the previous and previous circuits, but limits the high charging current. Constant current and constant voltage are actually current and voltage limiting. This circuit is quite popular, such as Nanfu and Xinyu. After being fully charged, it does not completely cut off and is replaced by trickle float charging - now long-term low current charging
4、 High voltage charging:
This charging method does not have a professional control circuit, and directly charges the battery with a protective board using a 5V power head (or a series diode step-down), relying entirely on the high voltage limit of the protective board. The characteristic is that the current is initially high, then gradually decreases and fluctuates at any time.
