3 Cell Lithium Ion Battery Charger Circuit

The circuit is powered at 5v through a micro usb connector.

3 cell lithium ion battery charger circuit.

Hi friends today in this video i have shown 3 7v lithium battery charger circuit very easy if you have enjoyed this video then pleas like share comment and. Using the current setup i was able to set the limits from 7 08v to 9v. It is a tiny module with all the components mentioned in the above circuit diagram. The booster part is used to boost the battery voltage from 3 7v to 4 5v 6v.

See if this link helps. It s a simple circuit that will effectively charge your li ion batteries. Circuit diagram and explanation. Based on the tp4056 lithium ion battery charger controller ic and the above shown circuit diagram several li ion battery charger modules are developed.

The shown current controlled li ion battery charger circuit illustrates a low drop out linear li ion battery charger design which is capable of charging a single 3 7v li ion cell. Here is a tried and tested sample circuit of a li ion battery charger that can be used to charge any 3 7v li ion battery using a 5vdc usb solar panel power supply. To charge a 3 7v cell you might have to change the value of r2. Lithium ion battery charger circuit.

This circuit is for a 2 cell li ion battery pack and successfully charged my 7 4v battery. The following image shows the module used in this project. The circuit is designed using a microchip mcp73831 2 ic. Tp4056 li ion battery charger module.

The 10 k preset positioned at pin3 of the opamp is used for setting the over charge level for a 3 7 v li polymer battery this may be set such that the output of the opamp goes high as soon as the battery is charged to 4 2 v for a single cell. This circuit has two main parts one is the battery charging circuit and the second is dc to dc boost converter part. The circuit diagram for 18650 lithium battery charger booster module is given above. When the usb is powered the fet q1 is turned off and current flows to the lithium ion charger ic and to the 3 3v regulator mcp1603.

Under usb power the lithium ion battery charges. Contain 3 leds and that will indicating power on off charging indicator and full charging indicator. I have to confess that i m faced with the same problem and feel changing r2 to 1k might be the. For enabling low voltage detection the switches j1 and j2 may be appropriately selected the ic starts the charging process by first detecting the voltage of the cell.

The circuit presented here is a usb powered lithium ion charger combined in a backup powered supply.