How to Make a 3S 18650 Battery Pack

38,482

141

14

Introduction: How to Make a 3S 18650 Battery Pack

About: Hi my name is Steve and i'm a Creative and I got Technical skills i can build anything just stick to my account . I'm a YouTuber so you also can see my all videos here https://www.youtube.com/SteveWillsonKujur

Hey! everyone My name is Steve .

Today i'm going to show you How to make a 3S 18650 Battery Pack

3S batteries are widely used in many application such as Bluetooth Speaker , Rc Cars & and many things you can think of .

it can easily power any 12v application with no issues

Let's Get Started


Click Here to See The Video

Step 1: Features

Supply Output

  • Nominal voltage - 11.1 v
  • Maximum voltage - 12.6 v
  • low voltage - 9 v

Safety Features

  • Over-Discharge Protection
  • Over-Charge Protection
  • Short-Circuit Protection

Step 2: Stuff I Used

  • 18650 Battery " i've salvage this battery from a laptop battery Click here to see how "
  • 18650 Battery Holder
  • 10 A BMS Board

Buying Links

#Amazon

#Aliexpress

Step 3: The Things You Need to Know


• It is necessary to use same capacity battery little up and down will be be ok ( example - 1750 mah , 1740 mah , 1730 mah )
• If you want to know how to check your real battery capacity "Click Here to See The Video "
• And it is very necessary to keep all the battery at same voltage " I found a best way to do this by connecting all the batteries in parallel and leave it over night "
• Be careful while doing this don't reverse the polarity

Step 4: Attaching the BMS & Battery Holder

  • Put 3 battery on the 18650 Battery Holder
  • Use a double sided tape to stick BMS on the batteries

Step 5: Connection

  • Connect all the battery as shown in the schematic

Step 6: How to Charge Them

  • you can just use a 12.6 v lithium battery charger to charge this battery
  • By the way i'll make a lithium battery charger later on so stay tuned for that

Step 7: Finishing

  • Now check the output voltage

Click Here to See The Video

You Just Made It

Thank you for visiting my Instructables

Stay tuned for next Projects

1 Person Made This Project!

Recommendations

  • Pocket-Sized Speed Challenge

    Pocket-Sized Speed Challenge
  • Super-Size Speed Challenge

    Super-Size Speed Challenge
  • Audio Challenge 2020

    Audio Challenge 2020

14 Discussions

0
Hadi vong
Hadi vong

Question 6 months ago on Step 1

Hi,i got a bms that is 3s 30 amps.how many batteries that i can put in parallel? For example 3s 4p something like that? Im kinda confused with it

0
gravinakristamarie
gravinakristamarie

Question 10 months ago on Step 6

CAN I USE SOLAR W/ PWM SCC 12VOLTS SYSTEM TO CHARGE LIFEPO4 BATTERIES

0
gravinakristamarie
gravinakristamarie

Answer 10 months ago

GUD DAY, CAN I USE SOLAR PV AND PWM SCC 12VOLTS/ 30AMPS TO CHARGE LI-ION BATTERIES.

0
rosekreuze
rosekreuze

1 year ago

can i use this 3s battery pack that could act as ups? power interruption is quite annoying here in our country. atleast we could have time to power off 12v devices like diy tv and waking in the middle of the night with the tv still on when power back on

0
rosekreuze
rosekreuze

Reply 1 year ago

the tv is powered 12v 1amp. also with your setup, how much amps does it require to charge?

0
Robear51
Robear51

1 year ago

Great little instructable and thanks for sharing. My only question is :
I did everything according to directions but don't get any voltage on P- and P+... Any thoughts?
Thanks
edit : After looking on the net and reading the specs on the charger, there is a mention that you have to charge it first to trigger the output.... Who knew lol.
Problem solved

0
RicardoC209
RicardoC209

1 year ago

Hi, this is a fantastic post i will be trying this very soon. I was looking through your other posts and couldn't locate the 12v charger you mentioned you'd build for this please would you post that or post a way of charging this 3S 18650 piece with a charger around the house maybe. Thanks again (Y)

0
saadland
saadland

1 year ago

I plan to make a 3S battery pack like that, for a device, can I connect the pack to a TP4056 module to charge it?? even if it if be very slow charging.
I want the 3S pack to be embedded in the device,and be able to charge it, just by connecting to power charger,I dont want to remove everytime the 3S pack to charge it.
What do you think ? any idea ?

0
michael_nonan
michael_nonan

2 years ago

Hi, just a little clarification. in your 1st picture, the red and black wire is soldered to b- & b2, where does this wire go to?

0
DavidT577
DavidT577

2 years ago

DOH Kiselin please pay attention it's a balance charge board B+ & B- are the input/output.

Please correct me if I am wrong as I have amassed the parts and about to commence building this for a solar garden lamp PSU.

I will bookmark so if any help advice shortfalls...

David

0
DavidT577
DavidT577

Reply 2 years ago

Oops P+ and P- not B+ & B-

0
tnytvs
tnytvs

3 years ago

Hi Steve,

How long with this 12V last playing on a Bluetooth speaker?

0
IgorF2
IgorF2

3 years ago

Do you know if I can put cells in parallel to make a 3S2P battery pack?