Lithium Ion Battery Charging Circuit Diagram

Circuit diagram and explanation.

Lithium ion battery charging circuit diagram.

Connected 3v lithium ion batteries in series will produce a high voltage with less size and easy to transport. A lithium polymer battery or simply a lipo battery is an advanced breed of the more popular lithium ion battery and just like it s older counterpart is specified with stringent charging and discharging parameters. I am building a solar charging circuit to charge a 3 7v 10000mah lithium ion battery. The following li ion battery charger circuit very efficiently follows the above conditions such that the connected battery is never allowed to exceed its over charge limit.

Based on the tp4056 lithium ion battery charger controller ic and the above shown circuit diagram several li ion battery charger modules are developed. 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. The circuit diagram for 18650 lithium battery charger booster module is given above. At the heart of the circuit is one microchip mcp73831 available in sot 23 5 package.

This is an excellent tutorial if a little above my current abilities. In a li ion battery lithium ions move from one intercalation compound to another while electrons flow around the circuit to power the load. This circuit has two main parts one is the battery charging circuit and the second is dc to dc boost converter part. The booster part is used to boost the battery voltage from 3 7v to 4 5v 6v.

Tp4056 li ion battery charger module. When the ic 555 is used as a comparator its pin 2 and pin 6 become effective sensing inputs for detecting the lower and the upper voltage threshold limits depending upon. Referring to the shown lipo battery charger circuit diagram the entire design could be seen configured around the ic lm317. I would also like to see a parts list for this circuit.

The following image shows the module used in this project. Charging the battery forces the ions to move back across the electrolyte and embed themselves in the negative electrode ready for the next discharge cycle figure 1. Diy lithium battery charger circuit is working based on an op amp of lm358 ic.