diy 18650 lithium ion cells charging grid - 18650 lithium ion cells

I have been driving my bike using a slow down DC motor and now I need a battery pack.
So in order to make the battery pack, I decided to use the popular 18650 lithium ion battery made of two old air pad batteries.
Since the battery comes from the old one, I need to balance the charging of all the batteries before making the battery pack.
Every time I use these 18650 batteries, I need to go through this stage when I need to balance charging all the batteries individually to make them have the same potential.
To get through efficiently, I decided to build a dedicated charger for 18650 batteries.
Also, I decided to make it a modular charger so that I could add up the modules to form a larger grid that would allow me to charge as many batteries as I want at the same time.
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Since we need the charger to be modular, easy to build and low cost, I have come across these TP-
4056 lithium battery charging board.
These boards are specifically designed to charge lithium-ion batteries with micro USB input, over-charge protection, and most importantly, they are very cheap.
For each module, I decided to use two unit brackets, which can hold up to four units per unit.
So for each module, we need eight TP-4056 modules.
For the main input of the board, I used XT-
60 connector, but we can also choose to charge two or three batteries using only the phone charger.
To keep it simple and tidy, I decided to design the printed circuit board.
I decided to order PCBs in order to save time.
So I visited Safeway and after going through a few options I ordered 10 boards.
These boards will be enough to build a charging grid capable of charging up to 80 batteries at the same time.
Once I uploaded the Gerber file, I waited for the design to be validated to make sure there was no problem with the motherboard.
This is one of many of their useful services and this project is what they have implemented, so be sure to check out their website for a good price to get a high quality pcb.
The pcb of the circuit board and the link to the Gerber file are: the discount coupon of the pcb look at the link: only a week, the pcb is on my workbench, the quality is almost on its own, so people can look at their website because they are implementing the project by sponsoring the project.
I have collected all the components. The BOM(
Bill of Materials)
Files are attached to this step.
We need basic welding materials for tools. TP-
4056 module: all we need to do to assemble the PCB is to put down all the components mentioned on the board.
I start by welding the charging board and then go to the larger assembly.
Once I 've finished welding all the widgets, I 've welded the battery stand.
Make sure the polarity on the battery holder matches the polarity mentioned on the pcb.
It took me almost 10 minutes to complete a module.
Now, I tested this module before I made more modules.
Now to test the module, I plug the phone charger into TP-
4056 board with micro USB cable.
This allows me to charge. to three cells.
To charge eight batteries, I used a PC power supply with a 5 v input, using XT-60 connector.
The module perfectly charges each unit.
When the battery is fully charged, the light on that particular charging board changes from red to blue, and we can turn the switch on for that particular battery to save power.
Now, in order to form the whole charging network, I do more modules because I have to charge a lot of batteries.
After making a few modules, I assembled them with some nuts and bolts as I didn't have the required brackets.
Now, to power the entire grid, I used the same power supply as I did in the previous step.
Since each module is connected in parallel on the stand, providing input through any module will provide power throughout the grid.
The whole project turned out to be very useful because now I have a custom charger that can charge as many batteries as I want.
The price of the whole charging network is a small part of the professional charger on the market and they don't have the ability to charge like they do.
The Pcb made everything tidy and the pre-made charging board saved a lot of trouble and I was very happy with the end result.
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