Battery Pack From Old Laptop

Make a 3S battery from old Laptop Battery

I needed a battery for my gimbal, and wanted to make it as small as possible and still have enough power to run the gimbal properly. The top bar of the gimbal is an old carbon bike handlebar. And I thought it would be cool to have the battery inside that. So that meant that i had to find some round batteries that would fit inside the handlebar.

I found a old defect laptop battery, and took i apart.

Lenovo Laptop BatteryThis one was from and old Lenovo, 9 Cell. My plan was to use as many as possible, but could only fit 3 in series to make a 3S battery.

nrc18650 li-ion cellI then seperated the cells. And was careful not short them.

The voltage on a NRC18650 cell should not be under 3.0v. The cells i used messured 3.6v so they should be fine to use.

3S Lipo NCR18650 Wiring Diagram

The 3 cells are wired like the diagram above so i have the possibilty to balance the cells, thou this require a charger that can do that.

My plan was to use a Battery Protection Board (BMS). So i can use other power sources. this protect the cell from discharging below a certain voltage and also from overcharging. Some of the board can also balance the cells.

 


Doradus 12.6V 8A w/Balance is the one i was thinking of ordering, but for now i’m testing to see if the battery exceeds my needs for the gimbal.

NCR18650 Charging
The charger was set to balance the batteries. And when it was done all the cells voltage was on 4.2V each which is perfect. It’s working which is great now i can begin to install them in my gimbal. Which is going to be a challenge.

I have to mention that i am no expert on Li-ion batteries, the information i have on this is what i could find around the internet. But if you have any questions i will try to answer.

If you want to follow my progress on my gimbal you can take a look at this YouTube playlist. https://www.youtube.com/playlist?list=PL5KFJk7C88CyACT3uYYr-Nyx273IVfg3U or the articles on this blog.

Related posts

Arduino code for the Camera Slider.

Arduino code for the Camera Slider.


Arduino code for the Camera Slider.

//Recently i have gotten some request for sharing the Arduino code for my homemade camera slider.To start with i just want to say, I'm no master in this, so there can be bugs, and the code is still early and not complete. Recently i haven't had much time for these kind of projects...

Homemade Camera Gimbal Finished

Homemade Camera Gimbal Finished


Homemade Camera Gimbal Finished

Homemade Camera Gimbal Finished (Almost) So my Gimbal project is reached a state where i can call it almost finished. Of course such a project will always have place for improvements, But for now it is in a working order.A lot of people have been asking me for the drawings / plans for the...

Camera Gimbal Update.

Camera Gimbal Update.


Camera Gimbal Update.

Update I released the next part of the Camera Gimbal build. https://youtu.be/OFVIN5ThFhMIt's taken a little while longer to build that i anticipated, i haven't had much time for this project but it is moving forward slowly. I need to build the handle, and mount the electronics properbly...

Reef Build – W00tifrutti

Reef Build - W00tifrutti


Reef Build - W00tifrutti

Reefbuild This reefbuild is not mine, i just helped a friend build this Saltwater aquarium.The Tank is ordered with measurement to fit the furniture. 

Mostly Printed CNC(MPCNC) Project

Mostly Printed CNC(MPCNC) Project


Mostly Printed CNC(MPCNC) Project

My newest project is building the mostly printed CNC machine. Created by vicious1My goal with this is to share what I experienced with this build so other maybe benefit from it. I am certainly not an expert on CNC machines. and all of this has been a learning experience for me.I choose...

DIY Gimbal Project (AlexMos) Worklog

DIY Gimbal Project (AlexMos) Worklog


DIY Gimbal Project (AlexMos) Worklog

Today i ordered the first parts for my Gimbal project.I have ordered Battery, Motors, and Controller, when i receive the parts i can begin to design the frame. The Gimbal is going the be used with a Sony A6000 Camera.This is the fist gimbal i ever made so this is Not a how to guide(at...

Leave a Reply