Production process of lithium ion battery charger

The manufacturing process of lithium-ion battery chargers Those who have used lithium-ion batteries must be familiar with lithium-ion battery chargers. Li-ion battery chargers are not as complicated as we think. Today, the lithium-ion battery manufacturer shares with you: If you make a portable lithium-ion battery charger yourself: the charger we made can output an adjustable charging current of 100ma-1a, and the input voltage is VIN18V, which can be used on a laptop computer. Charge with a voltage of 19V. The charging time is generally determined by the size of the charging output current. Because I charge a 16.5v lithium-ion battery, the input voltage is 18V, which can be greater than 18V. The laptop charger is very good. The input voltage of 18V is protected by a 1.5a fuse and diode to the input end of the PNP power tube. Because the output of pin 1 of LM324 is high, the Q3 transistor is in the on state, the base of the PNP power tube is low, and the power tube is in the on state, so the power tube in the default state is in the on state. The RL1 resistance is 1 ohm and is used for current limiting. After sampling the voltage on the resistor, compare the reference voltage with LM324, and then take out a voltage value. The output current of the power tube is controlled by this voltage value. It is always at a limit current, or short circuit current. The voltage of the lithium-ion battery of another sample, when the last-stage protection diode resistance of the battery is inserted through the two divided voltages of the output voltage power tube voltage multiplied by 17.5v, the LM324 compares the output transistor with the reference, and the green light is turned on. Insert into the battery holder, the sampling resistor, R6, R7 voltage sampling becomes low, and the reference voltage after comparison of LM324 is given at the same time, the red light is on. When fully charged, the voltage of the sampling part is equal to the reference voltage, the green light turns on, and the charging is complete. However, it will still be charged with a small current during the charging process. Li-ion battery charger This is the front picture of the charger. On the left is the DC18V input, on the right is the VOUT charging output port, on the left is the potentiometer for adjusting the output current, and on the right is the potentiometer for adjusting the threshold of the two-color LED state. Do you think the charging and production of lithium-ion batteries is very simple? If you have such conditions, you may wish to make one yourself according to this method! Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete Previous post: The correct way to use lead-acid batteries