how to make a 18650 li-ion battery pack! - lithium ion rechargeable battery
18650 Li-
Ion batteries are a great way to power the project.
A nominal voltage of 3 is provided.
7 v is not enough for most applications, say, you want to power the BLDC motor with ESC that requires a 9 v start.
Therefore, we need more voltage, which is realized by series.
So in this tutorial I will show you how to make 18650 Li-
Ion battery pack with BMS circuit and everything you need to know before you build one!
Watch video tutorials if you don't want to read everything I made for you!
First of all, we need to check the capacity of all batteries & make sure all batteries are at the same voltage.
All batteries must be at the same voltage, otherwise the battery will eventually charge each other, which can lead to unexpected results.
The 18650 battery can provide a nominal voltage of 3.
7 V, minimum voltage 3 v, maximum voltage 4. 2V.
So if we consider the nominal voltage, the series 6 batteries will give us 22.
2 v for 6s1 p configuration.
Where 6 s represents 6 cells in series and 1 p represents 1 cell in parallel.
By adding another 6 batteries in parallel, we can not only double the capacity, but also provide the number of current packets.
Keep these things in my head and I decided to build the 6s1 p configuration.
To make the battery pack, I brought some small black plastic gaskets that broke like Lego blocks and were very useful because we didn't need to use the adhesive.
Now make 2 pairs of 6 plastic gaskets to insert cells in alternating mode.
Now I measured the spacing between the two cells, about 25mm.
So I used the nickel band marked 25mm on it and snapped it with sharp scissors.
Now, place the nickel sheet on the top of the battery and use the spot welding machine to melt the nickel tape and the top of the battery for a series connection.
Now we can add and XT60 plug and call it in a day, but we can also add a BMS that adds some balance charging of overcharge, overdischarge and battery pack.
As shown on the board, we just need to weld it to the battery pack.
Also, some BMS like me don't offer balanced charging, so you need to add and balance the charging connector and you're done!