Frequent charging method of 18650 lithium ion battery

　　Author ：Iflowpower – Dodávateľ prenosných elektrární

First, constant current charging: This approach is derived from the previous and last circuit, but it is limited to high charging current. The constant current constant pressure is actually a limited flow limit, a silly father, or a fool This circuit is relatively popular, such as Nanfu, and Xinyu's stream, not completely deadline after flying, change the trickle floating–Today, the small current charging is one of the protector of the battery. Second, high pressure charging: This charging method does not have a special control circuit, straight 5V power head (or string one diode buck) pair with protector Battery charging, completely relying on the high pressure limit of the protector.

Features is very large at the beginning, then gradually decrease, floating at any time; most of which will be fried is this, common in low-end card MP3, etc., high-end can't afford, don't know–I don't dare to say that such a expensive machine should have a charging circuit–There are many things that should be done, but there is nothing to do.

Third, smart charging: This is the ideal charging management method, follow the charging algorithm that starts in this section, integrated in a small patch IC In the middle, the peripheral circuit is simple, stable and reliable, such as TP4054 / 4055/4056/4057, TP4002 / 5000, MAX1879, etc. The tight feature of this chip is that the determination is not overflowing while monitoring voltage and current, 4.2V stop, or charging current is less than 0.

01c (usually 50mA) stop; after the oil is completely closed, there is no trickle Charge, but monitor the voltage at any time, if the battery voltage drops to a certain value, then start charging. Fourth, constant pressure charging: This method is similar to the last, constant pressure is actually a limiting, set a relatively accurate high voltage, then death, less than 4.2V vow, the rivers and lakes said silly, this If the charger is very accurate, if it is too safe, if it is high, it has to rely on the protector, as for the bare battery to ask Du Fu.

It is common in this mobile phone to fully charge and flashlight. This charger costs less than a dollar. It is entirely struggled by inferior parts.

Taobao retail prices range from 2.00 to 15.00, how long can you use it?.