Simple 18650 Battery Charger Circuit Diagram

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.

Simple 18650 battery charger circuit diagram. Let us dive into the project by taking a look at the circuit diagram or rather the connection diagram of this diy solar battery charger for 18650. This is a very simple li ion battery charger circuit diagram with auto cut off current control features. If the battery is partially discharged full charge will be attained in one hour. This is the circuit of a simple 12 volt battery charger for lead acid battery.

I am an electric and electronics final year student. All the components which i will list out in the next section are very easy to acquire and are easily available in local electronics stores you can get them online as well. I mean both theory and pcb circuit. My final year thesis is portable smart solar battery charger for li ion battery 3 7v 1200mah from solar panel 5v 1000mah which have leds indicator overvoltage and overcurrent protection etc.

A battery charger is a device used to put energy into a secondary cell or rechargeable battery by forcing an electric current through it. Here is the circuit diagram of a simple and straight forward 12 v battery charger circuit with diagram. Charging li ion battery can be critical a li ion battery as we all know needs to be charged under controlled conditions if it s charged with ordinary means could lead to damage or even explosion of the battery. You can use this circuit to charge 12v sla battery or 12v gel cell battery and so on.

You can use mobile charger or computer usb as input. The circuit is nothing but a 12v dc power supply with an ammeter for monitoring the charging current. This circuit can be used to charge all type of 12v rechargeable batteries including car batteries. Simple 12 volt battery charger circuit diagram designed by using few easily available components and this circuit is suitable for different types of batteries needs 12 volt.

Now a days so many rechargeable batteries are coming like 1 2 v 3 7 v 4v 6v 9v 12v 24v etc you can check all types of battery charger circuit diagram at this page. The circuit uses a 0 14 volt 5 ampere step down transformer and a 10 amps bridge rectifier module to convert ac to dc. Below is the circuit diagram for our power bank. As we can see its fairly easy to make a power bank with li ion battery tp4056 module and a boost converter.

The second simple design explains a straightforward yet precise automatic li ion battery charger circuit using the ubiquitous ic 555. This circuit is designed to provide charging current upto 3 amps and this circuit don t have reverse polarity protection or over. Power bank circuit diagram. At the heart of the circuit is one microchip mcp73831 available in sot 23 5 package.