Lithium-Ion Battery Charger || DIY Li-ion Battery Charger

3.7v Lithium Battery Charger

As we 3.7v lithium-ion batteries in various projects. These 3.7v batteries are rechargeable so we can use them again and again. But the main question is that “How can we charge these batteries safely and easily?

So to overcome this problem, here we create this circuit and PCB. Through this, you can charge your 3 lithium-ion batteries safely and easily. And there is a lot of features in this 3.7 Volt battery charger. You can also call this battery

Charger a 3.7 Volt lithium-ion battery charging station.📷

>>Introduction

To charge this lithium-ion battery we need a TP4056 charging module to charge it safely. But we have to connect our battery to a charging module with some wires which is done by soldering. And if your battery gets fully charged then you have to again solder the wires for the next battery.

Here in this 3.7 Volt lithium-ion battery charging station, you can charge your 3S 3.7v battery at the same time as well as you can also see the real-time voltages of the battery during the charging process. To show the real-time voltages yeah I have used volunteers. And there are 3 Battery holders which make it easy to put the battery in it.

JLC PCB is the largest and fastest PCB manufacturer company in China. From here you can get your prototype PCB for just $2. The quality of PCB is very high, so you can also use their PCB for professional work. You can also use their SMT service to solder the SMD components. You can also choose the PCB color, and traces color free of cost. So if you want to visit their website then click here JLC PCB.

>>Making

Making the process of this 3.7 Volt lithium-ion battery charging station is very easy. If you want to make this 3.7v lithium charger at home then follow these steps carefully.

>>Components Required

• 3x TP4056 Charging Module
• 3x 18650 Battery Holder
• 3x Mini Voltmeter
• Male Pin Headers
• 12v DC Female Socket
• 3x SPST Switch

>>Role Of JLC PCB

Step 1:- Circuit Diagram and PCB

At first, we have to design the circuit diagram of this PCB and to design this type of PCB I am using Easyeda Software which is free and no need to download, and then convert this circuit into a Gerber file. Here am using the JLC PCB service to print my PCB for just $2. You can also download the Circuit Diagram and Gerber file from the link given below. Click Here to Download Gerber file and Click here to download circuit diagram.

Step 2:- Components Assembly

After getting PCB from JLC PCB I start Assembling components on it. At first, I put some male pin headers on PCB and solder them. Here I have used these male min headers to mount the tp4056 charging module easily. After that, I put all components there one by one like the battery holder, 12v DC female socket, and SPST switch.

Step 3:- Soldering Process

After the components assembly soldering is the most important part. The soldering process is very easy, at first solder male pin headers at their desired place, and then after placing the charging module solder the rest of the components carefully.

Step 4:- PCB Ready

After the soldering process, our PCB board is ready to use. So in input, we have to use a 5v DC supply with a maximum of 2A. You can also use any mobile charger to power up this 3.7v Lithium-ion charger. Here I have provided a 12v DC female socket for input. So u can easily use it.

>>How To Use

After the soldering process, our PCB board is ready to use. This charger PCB contains an SPST switch which allows passing charging through the desired battery. There are a total of 3 switches for 3 separate batteries. Here I have provided a 12v DC female socket for input, so connect a 5v Adapter or mobile charger to it.

Now our PCB is ready, now put your Lithium-ion battery into a battery holder with suitable terminals. After that on the SPST switch, now see your battery get start charging and the voltmeter starts showing battery voltage. If you turn all 3 SPST switches, all voltmeter starts showing battery voltage and the batteries start charging.

>>Features

This Is a 3.7v lithium-ion battery charger. This battery charger can charge up to 3 batteries together. And the most important thing is, that this battery charger has a battery holder which means you can easily insert or remove batteries after charging. In this battery charger, for a separate battery, there is a separate SPST switch to ON and OFF the charging process for the desired battery.

To indicate the Voltage level in the battery during the charging process, I have used a mini voltmeter which gives the real-time voltage during the charging process.

>>How To Order PCB

As you can see that our board is printed by JLC PCB which is the largest and fastest PCB manufacturing company in China. From here you can get your prototype PCB for just $2. The ordering process is very simple, you just have to upload your Gerber files, choose layers, PCB color, quantity, etc. After that upload your delivery address and then click on order now. After 10-15 days later you will receive your PCB.

You can also use their SMT service for SMD components. JLC PCB also provides SMT for the assembly of SMD components. In this SMT service, you can go your PCB with assembled SMD components. And the charge for the SMTP service is very low so anyone can afford it.

Watch the Full Video -

>>Conclusion

So in the end, if you are going to make this project then make it without any hesitation because this project can help you a lot. Through this, you can charge your 3.7 Volt lithium-ion batteries easily and safely. And don’t forget to visit JLC PCB PC, which offers you high-quality PCB for just a few dollars. So all the details about this project are given above, so make it and enjoy.